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authorDimitri Sokolyuk <demon@dim13.org>2018-09-27 20:03:23 +0200
committerDimitri Sokolyuk <demon@dim13.org>2018-09-27 20:03:23 +0200
commit14bb08c1df8db9ec6c8a05520d4eee67971235d9 (patch)
treefc820e59c26ed4c5e87e65737909b47959f0faa5 /vendor/golang.org/x/image/draw
parent54eb169e8fc9bc0357139e7c259e977b184f8fbb (diff)
mod tidy
Diffstat (limited to 'vendor/golang.org/x/image/draw')
-rw-r--r--vendor/golang.org/x/image/draw/draw.go43
-rw-r--r--vendor/golang.org/x/image/draw/gen.go1404
-rw-r--r--vendor/golang.org/x/image/draw/go1_8.go49
-rw-r--r--vendor/golang.org/x/image/draw/go1_9.go57
-rw-r--r--vendor/golang.org/x/image/draw/impl.go6670
-rw-r--r--vendor/golang.org/x/image/draw/scale.go527
6 files changed, 0 insertions, 8750 deletions
diff --git a/vendor/golang.org/x/image/draw/draw.go b/vendor/golang.org/x/image/draw/draw.go
deleted file mode 100644
index dfaa7fc..0000000
--- a/vendor/golang.org/x/image/draw/draw.go
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package draw provides image composition functions.
-//
-// See "The Go image/draw package" for an introduction to this package:
-// http://golang.org/doc/articles/image_draw.html
-//
-// This package is a superset of and a drop-in replacement for the image/draw
-// package in the standard library.
-package draw
-
-// This file, and the go1_*.go files, just contains the API exported by the
-// image/draw package in the standard library. Other files in this package
-// provide additional features.
-
-import (
- "image"
- "image/draw"
-)
-
-// Draw calls DrawMask with a nil mask.
-func Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point, op Op) {
- draw.Draw(dst, r, src, sp, draw.Op(op))
-}
-
-// DrawMask aligns r.Min in dst with sp in src and mp in mask and then
-// replaces the rectangle r in dst with the result of a Porter-Duff
-// composition. A nil mask is treated as opaque.
-func DrawMask(dst Image, r image.Rectangle, src image.Image, sp image.Point, mask image.Image, mp image.Point, op Op) {
- draw.DrawMask(dst, r, src, sp, mask, mp, draw.Op(op))
-}
-
-// FloydSteinberg is a Drawer that is the Src Op with Floyd-Steinberg error
-// diffusion.
-var FloydSteinberg Drawer = floydSteinberg{}
-
-type floydSteinberg struct{}
-
-func (floydSteinberg) Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point) {
- draw.FloydSteinberg.Draw(dst, r, src, sp)
-}
diff --git a/vendor/golang.org/x/image/draw/gen.go b/vendor/golang.org/x/image/draw/gen.go
deleted file mode 100644
index 822bb6a..0000000
--- a/vendor/golang.org/x/image/draw/gen.go
+++ /dev/null
@@ -1,1404 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build ignore
-
-package main
-
-import (
- "bytes"
- "flag"
- "fmt"
- "go/format"
- "io/ioutil"
- "log"
- "os"
- "strings"
-)
-
-var debug = flag.Bool("debug", false, "")
-
-func main() {
- flag.Parse()
-
- w := new(bytes.Buffer)
- w.WriteString("// generated by \"go run gen.go\". DO NOT EDIT.\n\n" +
- "package draw\n\nimport (\n" +
- "\"image\"\n" +
- "\"image/color\"\n" +
- "\"math\"\n" +
- "\n" +
- "\"golang.org/x/image/math/f64\"\n" +
- ")\n")
-
- gen(w, "nnInterpolator", codeNNScaleLeaf, codeNNTransformLeaf)
- gen(w, "ablInterpolator", codeABLScaleLeaf, codeABLTransformLeaf)
- genKernel(w)
-
- if *debug {
- os.Stdout.Write(w.Bytes())
- return
- }
- out, err := format.Source(w.Bytes())
- if err != nil {
- log.Fatal(err)
- }
- if err := ioutil.WriteFile("impl.go", out, 0660); err != nil {
- log.Fatal(err)
- }
-}
-
-var (
- // dsTypes are the (dst image type, src image type) pairs to generate
- // scale_DType_SType implementations for. The last element in the slice
- // should be the fallback pair ("Image", "image.Image").
- //
- // TODO: add *image.CMYK src type after Go 1.5 is released.
- // An *image.CMYK is also alwaysOpaque.
- dsTypes = []struct{ dType, sType string }{
- {"*image.RGBA", "*image.Gray"},
- {"*image.RGBA", "*image.NRGBA"},
- {"*image.RGBA", "*image.RGBA"},
- {"*image.RGBA", "*image.YCbCr"},
- {"*image.RGBA", "image.Image"},
- {"Image", "image.Image"},
- }
- dTypes, sTypes []string
- sTypesForDType = map[string][]string{}
- subsampleRatios = []string{
- "444",
- "422",
- "420",
- "440",
- }
- ops = []string{"Over", "Src"}
- // alwaysOpaque are those image.Image implementations that are always
- // opaque. For these types, Over is equivalent to the faster Src, in the
- // absence of a source mask.
- alwaysOpaque = map[string]bool{
- "*image.Gray": true,
- "*image.YCbCr": true,
- }
-)
-
-func init() {
- dTypesSeen := map[string]bool{}
- sTypesSeen := map[string]bool{}
- for _, t := range dsTypes {
- if !sTypesSeen[t.sType] {
- sTypesSeen[t.sType] = true
- sTypes = append(sTypes, t.sType)
- }
- if !dTypesSeen[t.dType] {
- dTypesSeen[t.dType] = true
- dTypes = append(dTypes, t.dType)
- }
- sTypesForDType[t.dType] = append(sTypesForDType[t.dType], t.sType)
- }
- sTypesForDType["anyDType"] = sTypes
-}
-
-type data struct {
- dType string
- sType string
- sratio string
- receiver string
- op string
-}
-
-func gen(w *bytes.Buffer, receiver string, codes ...string) {
- expn(w, codeRoot, &data{receiver: receiver})
- for _, code := range codes {
- for _, t := range dsTypes {
- for _, op := range ops {
- if op == "Over" && alwaysOpaque[t.sType] {
- continue
- }
- expn(w, code, &data{
- dType: t.dType,
- sType: t.sType,
- receiver: receiver,
- op: op,
- })
- }
- }
- }
-}
-
-func genKernel(w *bytes.Buffer) {
- expn(w, codeKernelRoot, &data{})
- for _, sType := range sTypes {
- expn(w, codeKernelScaleLeafX, &data{
- sType: sType,
- })
- }
- for _, dType := range dTypes {
- for _, op := range ops {
- expn(w, codeKernelScaleLeafY, &data{
- dType: dType,
- op: op,
- })
- }
- }
- for _, t := range dsTypes {
- for _, op := range ops {
- if op == "Over" && alwaysOpaque[t.sType] {
- continue
- }
- expn(w, codeKernelTransformLeaf, &data{
- dType: t.dType,
- sType: t.sType,
- op: op,
- })
- }
- }
-}
-
-func expn(w *bytes.Buffer, code string, d *data) {
- if d.sType == "*image.YCbCr" && d.sratio == "" {
- for _, sratio := range subsampleRatios {
- e := *d
- e.sratio = sratio
- expn(w, code, &e)
- }
- return
- }
-
- for _, line := range strings.Split(code, "\n") {
- line = expnLine(line, d)
- if line == ";" {
- continue
- }
- fmt.Fprintln(w, line)
- }
-}
-
-func expnLine(line string, d *data) string {
- for {
- i := strings.IndexByte(line, '$')
- if i < 0 {
- break
- }
- prefix, s := line[:i], line[i+1:]
-
- i = len(s)
- for j, c := range s {
- if !('A' <= c && c <= 'Z' || 'a' <= c && c <= 'z') {
- i = j
- break
- }
- }
- dollar, suffix := s[:i], s[i:]
-
- e := expnDollar(prefix, dollar, suffix, d)
- if e == "" {
- log.Fatalf("couldn't expand %q", line)
- }
- line = e
- }
- return line
-}
-
-// expnDollar expands a "$foo" fragment in a line of generated code. It returns
-// the empty string if there was a problem. It returns ";" if the generated
-// code is a no-op.
-func expnDollar(prefix, dollar, suffix string, d *data) string {
- switch dollar {
- case "dType":
- return prefix + d.dType + suffix
- case "dTypeRN":
- return prefix + relName(d.dType) + suffix
- case "sratio":
- return prefix + d.sratio + suffix
- case "sType":
- return prefix + d.sType + suffix
- case "sTypeRN":
- return prefix + relName(d.sType) + suffix
- case "receiver":
- return prefix + d.receiver + suffix
- case "op":
- return prefix + d.op + suffix
-
- case "switch":
- return expnSwitch("", "", true, suffix)
- case "switchD":
- return expnSwitch("", "", false, suffix)
- case "switchS":
- return expnSwitch("", "anyDType", false, suffix)
-
- case "preOuter":
- switch d.dType {
- default:
- return ";"
- case "Image":
- s := ""
- if d.sType == "image.Image" {
- s = "srcMask, smp := opts.SrcMask, opts.SrcMaskP\n"
- }
- return s +
- "dstMask, dmp := opts.DstMask, opts.DstMaskP\n" +
- "dstColorRGBA64 := &color.RGBA64{}\n" +
- "dstColor := color.Color(dstColorRGBA64)"
- }
-
- case "preInner":
- switch d.dType {
- default:
- return ";"
- case "*image.RGBA":
- return "d := " + pixOffset("dst", "dr.Min.X+adr.Min.X", "dr.Min.Y+int(dy)", "*4", "*dst.Stride")
- }
-
- case "preKernelOuter":
- switch d.sType {
- default:
- return ";"
- case "image.Image":
- return "srcMask, smp := opts.SrcMask, opts.SrcMaskP"
- }
-
- case "preKernelInner":
- switch d.dType {
- default:
- return ";"
- case "*image.RGBA":
- return "d := " + pixOffset("dst", "dr.Min.X+int(dx)", "dr.Min.Y+adr.Min.Y", "*4", "*dst.Stride")
- }
-
- case "blend":
- args, _ := splitArgs(suffix)
- if len(args) != 4 {
- return ""
- }
- switch d.sType {
- default:
- return argf(args, ""+
- "$3r = $0*$1r + $2*$3r\n"+
- "$3g = $0*$1g + $2*$3g\n"+
- "$3b = $0*$1b + $2*$3b\n"+
- "$3a = $0*$1a + $2*$3a",
- )
- case "*image.Gray":
- return argf(args, ""+
- "$3r = $0*$1r + $2*$3r",
- )
- case "*image.YCbCr":
- return argf(args, ""+
- "$3r = $0*$1r + $2*$3r\n"+
- "$3g = $0*$1g + $2*$3g\n"+
- "$3b = $0*$1b + $2*$3b",
- )
- }
-
- case "clampToAlpha":
- if alwaysOpaque[d.sType] {
- return ";"
- }
- // Go uses alpha-premultiplied color. The naive computation can lead to
- // invalid colors, e.g. red > alpha, when some weights are negative.
- return `
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
- `
-
- case "convFtou":
- args, _ := splitArgs(suffix)
- if len(args) != 2 {
- return ""
- }
-
- switch d.sType {
- default:
- return argf(args, ""+
- "$0r := uint32($1r)\n"+
- "$0g := uint32($1g)\n"+
- "$0b := uint32($1b)\n"+
- "$0a := uint32($1a)",
- )
- case "*image.Gray":
- return argf(args, ""+
- "$0r := uint32($1r)",
- )
- case "*image.YCbCr":
- return argf(args, ""+
- "$0r := uint32($1r)\n"+
- "$0g := uint32($1g)\n"+
- "$0b := uint32($1b)",
- )
- }
-
- case "outputu":
- args, _ := splitArgs(suffix)
- if len(args) != 3 {
- return ""
- }
-
- switch d.op {
- case "Over":
- switch d.dType {
- default:
- log.Fatalf("bad dType %q", d.dType)
- case "Image":
- return argf(args, ""+
- "qr, qg, qb, qa := dst.At($0, $1).RGBA()\n"+
- "if dstMask != nil {\n"+
- " _, _, _, ma := dstMask.At(dmp.X + $0, dmp.Y + $1).RGBA()\n"+
- " $2r = $2r * ma / 0xffff\n"+
- " $2g = $2g * ma / 0xffff\n"+
- " $2b = $2b * ma / 0xffff\n"+
- " $2a = $2a * ma / 0xffff\n"+
- "}\n"+
- "$2a1 := 0xffff - $2a\n"+
- "dstColorRGBA64.R = uint16(qr*$2a1/0xffff + $2r)\n"+
- "dstColorRGBA64.G = uint16(qg*$2a1/0xffff + $2g)\n"+
- "dstColorRGBA64.B = uint16(qb*$2a1/0xffff + $2b)\n"+
- "dstColorRGBA64.A = uint16(qa*$2a1/0xffff + $2a)\n"+
- "dst.Set($0, $1, dstColor)",
- )
- case "*image.RGBA":
- return argf(args, ""+
- "$2a1 := (0xffff - $2a) * 0x101\n"+
- "dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*$2a1/0xffff + $2r) >> 8)\n"+
- "dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*$2a1/0xffff + $2g) >> 8)\n"+
- "dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*$2a1/0xffff + $2b) >> 8)\n"+
- "dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*$2a1/0xffff + $2a) >> 8)",
- )
- }
-
- case "Src":
- switch d.dType {
- default:
- log.Fatalf("bad dType %q", d.dType)
- case "Image":
- return argf(args, ""+
- "if dstMask != nil {\n"+
- " qr, qg, qb, qa := dst.At($0, $1).RGBA()\n"+
- " _, _, _, ma := dstMask.At(dmp.X + $0, dmp.Y + $1).RGBA()\n"+
- " pr = pr * ma / 0xffff\n"+
- " pg = pg * ma / 0xffff\n"+
- " pb = pb * ma / 0xffff\n"+
- " pa = pa * ma / 0xffff\n"+
- " $2a1 := 0xffff - ma\n"+ // Note that this is ma, not $2a.
- " dstColorRGBA64.R = uint16(qr*$2a1/0xffff + $2r)\n"+
- " dstColorRGBA64.G = uint16(qg*$2a1/0xffff + $2g)\n"+
- " dstColorRGBA64.B = uint16(qb*$2a1/0xffff + $2b)\n"+
- " dstColorRGBA64.A = uint16(qa*$2a1/0xffff + $2a)\n"+
- " dst.Set($0, $1, dstColor)\n"+
- "} else {\n"+
- " dstColorRGBA64.R = uint16($2r)\n"+
- " dstColorRGBA64.G = uint16($2g)\n"+
- " dstColorRGBA64.B = uint16($2b)\n"+
- " dstColorRGBA64.A = uint16($2a)\n"+
- " dst.Set($0, $1, dstColor)\n"+
- "}",
- )
- case "*image.RGBA":
- switch d.sType {
- default:
- return argf(args, ""+
- "dst.Pix[d+0] = uint8($2r >> 8)\n"+
- "dst.Pix[d+1] = uint8($2g >> 8)\n"+
- "dst.Pix[d+2] = uint8($2b >> 8)\n"+
- "dst.Pix[d+3] = uint8($2a >> 8)",
- )
- case "*image.Gray":
- return argf(args, ""+
- "out := uint8($2r >> 8)\n"+
- "dst.Pix[d+0] = out\n"+
- "dst.Pix[d+1] = out\n"+
- "dst.Pix[d+2] = out\n"+
- "dst.Pix[d+3] = 0xff",
- )
- case "*image.YCbCr":
- return argf(args, ""+
- "dst.Pix[d+0] = uint8($2r >> 8)\n"+
- "dst.Pix[d+1] = uint8($2g >> 8)\n"+
- "dst.Pix[d+2] = uint8($2b >> 8)\n"+
- "dst.Pix[d+3] = 0xff",
- )
- }
- }
- }
-
- case "outputf":
- args, _ := splitArgs(suffix)
- if len(args) != 5 {
- return ""
- }
- ret := ""
-
- switch d.op {
- case "Over":
- switch d.dType {
- default:
- log.Fatalf("bad dType %q", d.dType)
- case "Image":
- ret = argf(args, ""+
- "qr, qg, qb, qa := dst.At($0, $1).RGBA()\n"+
- "$3r0 := uint32($2($3r * $4))\n"+
- "$3g0 := uint32($2($3g * $4))\n"+
- "$3b0 := uint32($2($3b * $4))\n"+
- "$3a0 := uint32($2($3a * $4))\n"+
- "if dstMask != nil {\n"+
- " _, _, _, ma := dstMask.At(dmp.X + $0, dmp.Y + $1).RGBA()\n"+
- " $3r0 = $3r0 * ma / 0xffff\n"+
- " $3g0 = $3g0 * ma / 0xffff\n"+
- " $3b0 = $3b0 * ma / 0xffff\n"+
- " $3a0 = $3a0 * ma / 0xffff\n"+
- "}\n"+
- "$3a1 := 0xffff - $3a0\n"+
- "dstColorRGBA64.R = uint16(qr*$3a1/0xffff + $3r0)\n"+
- "dstColorRGBA64.G = uint16(qg*$3a1/0xffff + $3g0)\n"+
- "dstColorRGBA64.B = uint16(qb*$3a1/0xffff + $3b0)\n"+
- "dstColorRGBA64.A = uint16(qa*$3a1/0xffff + $3a0)\n"+
- "dst.Set($0, $1, dstColor)",
- )
- case "*image.RGBA":
- ret = argf(args, ""+
- "$3r0 := uint32($2($3r * $4))\n"+
- "$3g0 := uint32($2($3g * $4))\n"+
- "$3b0 := uint32($2($3b * $4))\n"+
- "$3a0 := uint32($2($3a * $4))\n"+
- "$3a1 := (0xffff - uint32($3a0)) * 0x101\n"+
- "dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*$3a1/0xffff + $3r0) >> 8)\n"+
- "dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*$3a1/0xffff + $3g0) >> 8)\n"+
- "dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*$3a1/0xffff + $3b0) >> 8)\n"+
- "dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*$3a1/0xffff + $3a0) >> 8)",
- )
- }
-
- case "Src":
- switch d.dType {
- default:
- log.Fatalf("bad dType %q", d.dType)
- case "Image":
- ret = argf(args, ""+
- "if dstMask != nil {\n"+
- " qr, qg, qb, qa := dst.At($0, $1).RGBA()\n"+
- " _, _, _, ma := dstMask.At(dmp.X + $0, dmp.Y + $1).RGBA()\n"+
- " pr := uint32($2($3r * $4)) * ma / 0xffff\n"+
- " pg := uint32($2($3g * $4)) * ma / 0xffff\n"+
- " pb := uint32($2($3b * $4)) * ma / 0xffff\n"+
- " pa := uint32($2($3a * $4)) * ma / 0xffff\n"+
- " pa1 := 0xffff - ma\n"+ // Note that this is ma, not pa.
- " dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)\n"+
- " dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)\n"+
- " dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)\n"+
- " dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)\n"+
- " dst.Set($0, $1, dstColor)\n"+
- "} else {\n"+
- " dstColorRGBA64.R = $2($3r * $4)\n"+
- " dstColorRGBA64.G = $2($3g * $4)\n"+
- " dstColorRGBA64.B = $2($3b * $4)\n"+
- " dstColorRGBA64.A = $2($3a * $4)\n"+
- " dst.Set($0, $1, dstColor)\n"+
- "}",
- )
- case "*image.RGBA":
- switch d.sType {
- default:
- ret = argf(args, ""+
- "dst.Pix[d+0] = uint8($2($3r * $4) >> 8)\n"+
- "dst.Pix[d+1] = uint8($2($3g * $4) >> 8)\n"+
- "dst.Pix[d+2] = uint8($2($3b * $4) >> 8)\n"+
- "dst.Pix[d+3] = uint8($2($3a * $4) >> 8)",
- )
- case "*image.Gray":
- ret = argf(args, ""+
- "out := uint8($2($3r * $4) >> 8)\n"+
- "dst.Pix[d+0] = out\n"+
- "dst.Pix[d+1] = out\n"+
- "dst.Pix[d+2] = out\n"+
- "dst.Pix[d+3] = 0xff",
- )
- case "*image.YCbCr":
- ret = argf(args, ""+
- "dst.Pix[d+0] = uint8($2($3r * $4) >> 8)\n"+
- "dst.Pix[d+1] = uint8($2($3g * $4) >> 8)\n"+
- "dst.Pix[d+2] = uint8($2($3b * $4) >> 8)\n"+
- "dst.Pix[d+3] = 0xff",
- )
- }
- }
- }
-
- return strings.Replace(ret, " * 1)", ")", -1)
-
- case "srcf", "srcu":
- lhs, eqOp := splitEq(prefix)
- if lhs == "" {
- return ""
- }
- args, extra := splitArgs(suffix)
- if len(args) != 2 {
- return ""
- }
-
- tmp := ""
- if dollar == "srcf" {
- tmp = "u"
- }
-
- // TODO: there's no need to multiply by 0x101 in the switch below if
- // the next thing we're going to do is shift right by 8.
-
- buf := new(bytes.Buffer)
- switch d.sType {
- default:
- log.Fatalf("bad sType %q", d.sType)
- case "image.Image":
- fmt.Fprintf(buf, ""+
- "%sr%s, %sg%s, %sb%s, %sa%s := src.At(%s, %s).RGBA()\n",
- lhs, tmp, lhs, tmp, lhs, tmp, lhs, tmp, args[0], args[1],
- )
- if d.dType == "" || d.dType == "Image" {
- fmt.Fprintf(buf, ""+
- "if srcMask != nil {\n"+
- " _, _, _, ma := srcMask.At(smp.X+%s, smp.Y+%s).RGBA()\n"+
- " %sr%s = %sr%s * ma / 0xffff\n"+
- " %sg%s = %sg%s * ma / 0xffff\n"+
- " %sb%s = %sb%s * ma / 0xffff\n"+
- " %sa%s = %sa%s * ma / 0xffff\n"+
- "}\n",
- args[0], args[1],
- lhs, tmp, lhs, tmp,
- lhs, tmp, lhs, tmp,
- lhs, tmp, lhs, tmp,
- lhs, tmp, lhs, tmp,
- )
- }
- case "*image.Gray":
- fmt.Fprintf(buf, ""+
- "%si := %s\n"+
- "%sr%s := uint32(src.Pix[%si]) * 0x101\n",
- lhs, pixOffset("src", args[0], args[1], "", "*src.Stride"),
- lhs, tmp, lhs,
- )
- case "*image.NRGBA":
- fmt.Fprintf(buf, ""+
- "%si := %s\n"+
- "%sa%s := uint32(src.Pix[%si+3]) * 0x101\n"+
- "%sr%s := uint32(src.Pix[%si+0]) * %sa%s / 0xff\n"+
- "%sg%s := uint32(src.Pix[%si+1]) * %sa%s / 0xff\n"+
- "%sb%s := uint32(src.Pix[%si+2]) * %sa%s / 0xff\n",
- lhs, pixOffset("src", args[0], args[1], "*4", "*src.Stride"),
- lhs, tmp, lhs,
- lhs, tmp, lhs, lhs, tmp,
- lhs, tmp, lhs, lhs, tmp,
- lhs, tmp, lhs, lhs, tmp,
- )
- case "*image.RGBA":
- fmt.Fprintf(buf, ""+
- "%si := %s\n"+
- "%sr%s := uint32(src.Pix[%si+0]) * 0x101\n"+
- "%sg%s := uint32(src.Pix[%si+1]) * 0x101\n"+
- "%sb%s := uint32(src.Pix[%si+2]) * 0x101\n"+
- "%sa%s := uint32(src.Pix[%si+3]) * 0x101\n",
- lhs, pixOffset("src", args[0], args[1], "*4", "*src.Stride"),
- lhs, tmp, lhs,
- lhs, tmp, lhs,
- lhs, tmp, lhs,
- lhs, tmp, lhs,
- )
- case "*image.YCbCr":
- fmt.Fprintf(buf, ""+
- "%si := %s\n"+
- "%sj := %s\n"+
- "%s\n",
- lhs, pixOffset("src", args[0], args[1], "", "*src.YStride"),
- lhs, cOffset(args[0], args[1], d.sratio),
- ycbcrToRGB(lhs, tmp),
- )
- }
-
- if dollar == "srcf" {
- switch d.sType {
- default:
- fmt.Fprintf(buf, ""+
- "%sr %s float64(%sru)%s\n"+
- "%sg %s float64(%sgu)%s\n"+
- "%sb %s float64(%sbu)%s\n"+
- "%sa %s float64(%sau)%s\n",
- lhs, eqOp, lhs, extra,
- lhs, eqOp, lhs, extra,
- lhs, eqOp, lhs, extra,
- lhs, eqOp, lhs, extra,
- )
- case "*image.Gray":
- fmt.Fprintf(buf, ""+
- "%sr %s float64(%sru)%s\n",
- lhs, eqOp, lhs, extra,
- )
- case "*image.YCbCr":
- fmt.Fprintf(buf, ""+
- "%sr %s float64(%sru)%s\n"+
- "%sg %s float64(%sgu)%s\n"+
- "%sb %s float64(%sbu)%s\n",
- lhs, eqOp, lhs, extra,
- lhs, eqOp, lhs, extra,
- lhs, eqOp, lhs, extra,
- )
- }
- }
-
- return strings.TrimSpace(buf.String())
-
- case "tweakD":
- if d.dType == "*image.RGBA" {
- return "d += dst.Stride"
- }
- return ";"
-
- case "tweakDx":
- if d.dType == "*image.RGBA" {
- return strings.Replace(prefix, "dx++", "dx, d = dx+1, d+4", 1)
- }
- return prefix
-
- case "tweakDy":
- if d.dType == "*image.RGBA" {
- return strings.Replace(prefix, "for dy, s", "for _, s", 1)
- }
- return prefix
-
- case "tweakP":
- switch d.sType {
- case "*image.Gray":
- if strings.HasPrefix(strings.TrimSpace(prefix), "pa * ") {
- return "1,"
- }
- return "pr,"
- case "*image.YCbCr":
- if strings.HasPrefix(strings.TrimSpace(prefix), "pa * ") {
- return "1,"
- }
- }
- return prefix
-
- case "tweakPr":
- if d.sType == "*image.Gray" {
- return "pr *= s.invTotalWeightFFFF"
- }
- return ";"
-
- case "tweakVarP":
- switch d.sType {
- case "*image.Gray":
- return strings.Replace(prefix, "var pr, pg, pb, pa", "var pr", 1)
- case "*image.YCbCr":
- return strings.Replace(prefix, "var pr, pg, pb, pa", "var pr, pg, pb", 1)
- }
- return prefix
- }
- return ""
-}
-
-func expnSwitch(op, dType string, expandBoth bool, template string) string {
- if op == "" && dType != "anyDType" {
- lines := []string{"switch op {"}
- for _, op = range ops {
- lines = append(lines,
- fmt.Sprintf("case %s:", op),
- expnSwitch(op, dType, expandBoth, template),
- )
- }
- lines = append(lines, "}")
- return strings.Join(lines, "\n")
- }
-
- switchVar := "dst"
- if dType != "" {
- switchVar = "src"
- }
- lines := []string{fmt.Sprintf("switch %s := %s.(type) {", switchVar, switchVar)}
-
- fallback, values := "Image", dTypes
- if dType != "" {
- fallback, values = "image.Image", sTypesForDType[dType]
- }
- for _, v := range values {
- if dType != "" {
- // v is the sType. Skip those always-opaque sTypes, where Over is
- // equivalent to Src.
- if op == "Over" && alwaysOpaque[v] {
- continue
- }
- }
-
- if v == fallback {
- lines = append(lines, "default:")
- } else {
- lines = append(lines, fmt.Sprintf("case %s:", v))
- }
-
- if dType != "" {
- if v == "*image.YCbCr" {
- lines = append(lines, expnSwitchYCbCr(op, dType, template))
- } else {
- lines = append(lines, expnLine(template, &data{dType: dType, sType: v, op: op}))
- }
- } else if !expandBoth {
- lines = append(lines, expnLine(template, &data{dType: v, op: op}))
- } else {
- lines = append(lines, expnSwitch(op, v, false, template))
- }
- }
-
- lines = append(lines, "}")
- return strings.Join(lines, "\n")
-}
-
-func expnSwitchYCbCr(op, dType, template string) string {
- lines := []string{
- "switch src.SubsampleRatio {",
- "default:",
- expnLine(template, &data{dType: dType, sType: "image.Image", op: op}),
- }
- for _, sratio := range subsampleRatios {
- lines = append(lines,
- fmt.Sprintf("case image.YCbCrSubsampleRatio%s:", sratio),
- expnLine(template, &data{dType: dType, sType: "*image.YCbCr", sratio: sratio, op: op}),
- )
- }
- lines = append(lines, "}")
- return strings.Join(lines, "\n")
-}
-
-func argf(args []string, s string) string {
- if len(args) > 9 {
- panic("too many args")
- }
- for i, a := range args {
- old := fmt.Sprintf("$%d", i)
- s = strings.Replace(s, old, a, -1)
- }
- return s
-}
-
-func pixOffset(m, x, y, xstride, ystride string) string {
- return fmt.Sprintf("(%s-%s.Rect.Min.Y)%s + (%s-%s.Rect.Min.X)%s", y, m, ystride, x, m, xstride)
-}
-
-func cOffset(x, y, sratio string) string {
- switch sratio {
- case "444":
- return fmt.Sprintf("( %s - src.Rect.Min.Y )*src.CStride + ( %s - src.Rect.Min.X )", y, x)
- case "422":
- return fmt.Sprintf("( %s - src.Rect.Min.Y )*src.CStride + ((%s)/2 - src.Rect.Min.X/2)", y, x)
- case "420":
- return fmt.Sprintf("((%s)/2 - src.Rect.Min.Y/2)*src.CStride + ((%s)/2 - src.Rect.Min.X/2)", y, x)
- case "440":
- return fmt.Sprintf("((%s)/2 - src.Rect.Min.Y/2)*src.CStride + ( %s - src.Rect.Min.X )", y, x)
- }
- return fmt.Sprintf("unsupported sratio %q", sratio)
-}
-
-func ycbcrToRGB(lhs, tmp string) string {
- s := `
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- $yy1 := int(src.Y[$i]) * 0x10101
- $cb1 := int(src.Cb[$j]) - 128
- $cr1 := int(src.Cr[$j]) - 128
- $r@ := ($yy1 + 91881*$cr1) >> 8
- $g@ := ($yy1 - 22554*$cb1 - 46802*$cr1) >> 8
- $b@ := ($yy1 + 116130*$cb1) >> 8
- if $r@ < 0 {
- $r@ = 0
- } else if $r@ > 0xffff {
- $r@ = 0xffff
- }
- if $g@ < 0 {
- $g@ = 0
- } else if $g@ > 0xffff {
- $g@ = 0xffff
- }
- if $b@ < 0 {
- $b@ = 0
- } else if $b@ > 0xffff {
- $b@ = 0xffff
- }
- `
- s = strings.Replace(s, "$", lhs, -1)
- s = strings.Replace(s, "@", tmp, -1)
- return s
-}
-
-func split(s, sep string) (string, string) {
- if i := strings.Index(s, sep); i >= 0 {
- return strings.TrimSpace(s[:i]), strings.TrimSpace(s[i+len(sep):])
- }
- return "", ""
-}
-
-func splitEq(s string) (lhs, eqOp string) {
- s = strings.TrimSpace(s)
- if lhs, _ = split(s, ":="); lhs != "" {
- return lhs, ":="
- }
- if lhs, _ = split(s, "+="); lhs != "" {
- return lhs, "+="
- }
- return "", ""
-}
-
-func splitArgs(s string) (args []string, extra string) {
- s = strings.TrimSpace(s)
- if s == "" || s[0] != '[' {
- return nil, ""
- }
- s = s[1:]
-
- i := strings.IndexByte(s, ']')
- if i < 0 {
- return nil, ""
- }
- args, extra = strings.Split(s[:i], ","), s[i+1:]
- for i := range args {
- args[i] = strings.TrimSpace(args[i])
- }
- return args, extra
-}
-
-func relName(s string) string {
- if i := strings.LastIndex(s, "."); i >= 0 {
- return s[i+1:]
- }
- return s
-}
-
-const (
- codeRoot = `
- func (z $receiver) Scale(dst Image, dr image.Rectangle, src image.Image, sr image.Rectangle, op Op, opts *Options) {
- // Try to simplify a Scale to a Copy when DstMask is not specified.
- // If DstMask is not nil, Copy will call Scale back with same dr and sr, and cause stack overflow.
- if dr.Size() == sr.Size() && (opts == nil || opts.DstMask == nil) {
- Copy(dst, dr.Min, src, sr, op, opts)
- return
- }
-
- var o Options
- if opts != nil {
- o = *opts
- }
-
- // adr is the affected destination pixels.
- adr := dst.Bounds().Intersect(dr)
- adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP)
- if adr.Empty() || sr.Empty() {
- return
- }
- // Make adr relative to dr.Min.
- adr = adr.Sub(dr.Min)
- if op == Over && o.SrcMask == nil && opaque(src) {
- op = Src
- }
-
- // sr is the source pixels. If it extends beyond the src bounds,
- // we cannot use the type-specific fast paths, as they access
- // the Pix fields directly without bounds checking.
- //
- // Similarly, the fast paths assume that the masks are nil.
- if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) {
- switch op {
- case Over:
- z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o)
- case Src:
- z.scale_Image_Image_Src(dst, dr, adr, src, sr, &o)
- }
- } else if _, ok := src.(*image.Uniform); ok {
- Draw(dst, dr, src, src.Bounds().Min, op)
- } else {
- $switch z.scale_$dTypeRN_$sTypeRN$sratio_$op(dst, dr, adr, src, sr, &o)
- }
- }
-
- func (z $receiver) Transform(dst Image, s2d f64.Aff3, src image.Image, sr image.Rectangle, op Op, opts *Options) {
- // Try to simplify a Transform to a Copy.
- if s2d[0] == 1 && s2d[1] == 0 && s2d[3] == 0 && s2d[4] == 1 {
- dx := int(s2d[2])
- dy := int(s2d[5])
- if float64(dx) == s2d[2] && float64(dy) == s2d[5] {
- Copy(dst, image.Point{X: sr.Min.X + dx, Y: sr.Min.X + dy}, src, sr, op, opts)
- return
- }
- }
-
- var o Options
- if opts != nil {
- o = *opts
- }
-
- dr := transformRect(&s2d, &sr)
- // adr is the affected destination pixels.
- adr := dst.Bounds().Intersect(dr)
- adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP)
- if adr.Empty() || sr.Empty() {
- return
- }
- if op == Over && o.SrcMask == nil && opaque(src) {
- op = Src
- }
-
- d2s := invert(&s2d)
- // bias is a translation of the mapping from dst coordinates to src
- // coordinates such that the latter temporarily have non-negative X
- // and Y coordinates. This allows us to write int(f) instead of
- // int(math.Floor(f)), since "round to zero" and "round down" are
- // equivalent when f >= 0, but the former is much cheaper. The X--
- // and Y-- are because the TransformLeaf methods have a "sx -= 0.5"
- // adjustment.
- bias := transformRect(&d2s, &adr).Min
- bias.X--
- bias.Y--
- d2s[2] -= float64(bias.X)
- d2s[5] -= float64(bias.Y)
- // Make adr relative to dr.Min.
- adr = adr.Sub(dr.Min)
- // sr is the source pixels. If it extends beyond the src bounds,
- // we cannot use the type-specific fast paths, as they access
- // the Pix fields directly without bounds checking.
- //
- // Similarly, the fast paths assume that the masks are nil.
- if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) {
- switch op {
- case Over:
- z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
- case Src:
- z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- } else if u, ok := src.(*image.Uniform); ok {
- transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op)
- } else {
- $switch z.transform_$dTypeRN_$sTypeRN$sratio_$op(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- }
- `
-
- codeNNScaleLeaf = `
- func (nnInterpolator) scale_$dTypeRN_$sTypeRN$sratio_$op(dst $dType, dr, adr image.Rectangle, src $sType, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- $preOuter
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- $preInner
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { $tweakDx
- sx := (2*uint64(dx) + 1) * sw / dw2
- p := $srcu[sr.Min.X + int(sx), sr.Min.Y + int(sy)]
- $outputu[dr.Min.X + int(dx), dr.Min.Y + int(dy), p]
- }
- }
- }
- `
-
- codeNNTransformLeaf = `
- func (nnInterpolator) transform_$dTypeRN_$sTypeRN$sratio_$op(dst $dType, dr, adr image.Rectangle, d2s *f64.Aff3, src $sType, sr image.Rectangle, bias image.Point, opts *Options) {
- $preOuter
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y + int(dy)) + 0.5
- $preInner
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { $tweakDx
- dxf := float64(dr.Min.X + int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf + d2s[1]*dyf + d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf + d2s[4]*dyf + d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- p := $srcu[sx0, sy0]
- $outputu[dr.Min.X + int(dx), dr.Min.Y + int(dy), p]
- }
- }
- }
- `
-
- codeABLScaleLeaf = `
- func (ablInterpolator) scale_$dTypeRN_$sTypeRN$sratio_$op(dst $dType, dr, adr image.Rectangle, src $sType, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw - 1, sh - 1
- $preOuter
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
- $preInner
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { $tweakDx
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00 := $srcf[sr.Min.X + int(sx0), sr.Min.Y + int(sy0)]
- s10 := $srcf[sr.Min.X + int(sx1), sr.Min.Y + int(sy0)]
- $blend[xFrac1, s00, xFrac0, s10]
- s01 := $srcf[sr.Min.X + int(sx0), sr.Min.Y + int(sy1)]
- s11 := $srcf[sr.Min.X + int(sx1), sr.Min.Y + int(sy1)]
- $blend[xFrac1, s01, xFrac0, s11]
- $blend[yFrac1, s10, yFrac0, s11]
- $convFtou[p, s11]
- $outputu[dr.Min.X + int(dx), dr.Min.Y + int(dy), p]
- }
- }
- }
- `
-
- codeABLTransformLeaf = `
- func (ablInterpolator) transform_$dTypeRN_$sTypeRN$sratio_$op(dst $dType, dr, adr image.Rectangle, d2s *f64.Aff3, src $sType, sr image.Rectangle, bias image.Point, opts *Options) {
- $preOuter
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y + int(dy)) + 0.5
- $preInner
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { $tweakDx
- dxf := float64(dr.Min.X + int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00 := $srcf[sx0, sy0]
- s10 := $srcf[sx1, sy0]
- $blend[xFrac1, s00, xFrac0, s10]
- s01 := $srcf[sx0, sy1]
- s11 := $srcf[sx1, sy1]
- $blend[xFrac1, s01, xFrac0, s11]
- $blend[yFrac1, s10, yFrac0, s11]
- $convFtou[p, s11]
- $outputu[dr.Min.X + int(dx), dr.Min.Y + int(dy), p]
- }
- }
- }
- `
-
- codeKernelRoot = `
- func (z *kernelScaler) Scale(dst Image, dr image.Rectangle, src image.Image, sr image.Rectangle, op Op, opts *Options) {
- if z.dw != int32(dr.Dx()) || z.dh != int32(dr.Dy()) || z.sw != int32(sr.Dx()) || z.sh != int32(sr.Dy()) {
- z.kernel.Scale(dst, dr, src, sr, op, opts)
- return
- }
-
- var o Options
- if opts != nil {
- o = *opts
- }
-
- // adr is the affected destination pixels.
- adr := dst.Bounds().Intersect(dr)
- adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP)
- if adr.Empty() || sr.Empty() {
- return
- }
- // Make adr relative to dr.Min.
- adr = adr.Sub(dr.Min)
- if op == Over && o.SrcMask == nil && opaque(src) {
- op = Src
- }
-
- if _, ok := src.(*image.Uniform); ok && o.DstMask == nil && o.SrcMask == nil && sr.In(src.Bounds()) {
- Draw(dst, dr, src, src.Bounds().Min, op)
- return
- }
-
- // Create a temporary buffer:
- // scaleX distributes the source image's columns over the temporary image.
- // scaleY distributes the temporary image's rows over the destination image.
- var tmp [][4]float64
- if z.pool.New != nil {
- tmpp := z.pool.Get().(*[][4]float64)
- defer z.pool.Put(tmpp)
- tmp = *tmpp
- } else {
- tmp = z.makeTmpBuf()
- }
-
- // sr is the source pixels. If it extends beyond the src bounds,
- // we cannot use the type-specific fast paths, as they access
- // the Pix fields directly without bounds checking.
- //
- // Similarly, the fast paths assume that the masks are nil.
- if o.SrcMask != nil || !sr.In(src.Bounds()) {
- z.scaleX_Image(tmp, src, sr, &o)
- } else {
- $switchS z.scaleX_$sTypeRN$sratio(tmp, src, sr, &o)
- }
-
- if o.DstMask != nil {
- switch op {
- case Over:
- z.scaleY_Image_Over(dst, dr, adr, tmp, &o)
- case Src:
- z.scaleY_Image_Src(dst, dr, adr, tmp, &o)
- }
- } else {
- $switchD z.scaleY_$dTypeRN_$op(dst, dr, adr, tmp, &o)
- }
- }
-
- func (q *Kernel) Transform(dst Image, s2d f64.Aff3, src image.Image, sr image.Rectangle, op Op, opts *Options) {
- var o Options
- if opts != nil {
- o = *opts
- }
-
- dr := transformRect(&s2d, &sr)
- // adr is the affected destination pixels.
- adr := dst.Bounds().Intersect(dr)
- adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP)
- if adr.Empty() || sr.Empty() {
- return
- }
- if op == Over && o.SrcMask == nil && opaque(src) {
- op = Src
- }
- d2s := invert(&s2d)
- // bias is a translation of the mapping from dst coordinates to src
- // coordinates such that the latter temporarily have non-negative X
- // and Y coordinates. This allows us to write int(f) instead of
- // int(math.Floor(f)), since "round to zero" and "round down" are
- // equivalent when f >= 0, but the former is much cheaper. The X--
- // and Y-- are because the TransformLeaf methods have a "sx -= 0.5"
- // adjustment.
- bias := transformRect(&d2s, &adr).Min
- bias.X--
- bias.Y--
- d2s[2] -= float64(bias.X)
- d2s[5] -= float64(bias.Y)
- // Make adr relative to dr.Min.
- adr = adr.Sub(dr.Min)
-
- if u, ok := src.(*image.Uniform); ok && o.DstMask != nil && o.SrcMask != nil && sr.In(src.Bounds()) {
- transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op)
- return
- }
-
- xscale := abs(d2s[0])
- if s := abs(d2s[1]); xscale < s {
- xscale = s
- }
- yscale := abs(d2s[3])
- if s := abs(d2s[4]); yscale < s {
- yscale = s
- }
-
- // sr is the source pixels. If it extends beyond the src bounds,
- // we cannot use the type-specific fast paths, as they access
- // the Pix fields directly without bounds checking.
- //
- // Similarly, the fast paths assume that the masks are nil.
- if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) {
- switch op {
- case Over:
- q.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- case Src:
- q.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- }
- } else {
- $switch q.transform_$dTypeRN_$sTypeRN$sratio_$op(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- }
- }
- `
-
- codeKernelScaleLeafX = `
- func (z *kernelScaler) scaleX_$sTypeRN$sratio(tmp [][4]float64, src $sType, sr image.Rectangle, opts *Options) {
- t := 0
- $preKernelOuter
- for y := int32(0); y < z.sh; y++ {
- for _, s := range z.horizontal.sources {
- var pr, pg, pb, pa float64 $tweakVarP
- for _, c := range z.horizontal.contribs[s.i:s.j] {
- p += $srcf[sr.Min.X + int(c.coord), sr.Min.Y + int(y)] * c.weight
- }
- $tweakPr
- tmp[t] = [4]float64{
- pr * s.invTotalWeightFFFF, $tweakP
- pg * s.invTotalWeightFFFF, $tweakP
- pb * s.invTotalWeightFFFF, $tweakP
- pa * s.invTotalWeightFFFF, $tweakP
- }
- t++
- }
- }
- }
- `
-
- codeKernelScaleLeafY = `
- func (z *kernelScaler) scaleY_$dTypeRN_$op(dst $dType, dr, adr image.Rectangle, tmp [][4]float64, opts *Options) {
- $preOuter
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- $preKernelInner
- for dy, s := range z.vertical.sources[adr.Min.Y:adr.Max.Y] { $tweakDy
- var pr, pg, pb, pa float64
- for _, c := range z.vertical.contribs[s.i:s.j] {
- p := &tmp[c.coord*z.dw+dx]
- pr += p[0] * c.weight
- pg += p[1] * c.weight
- pb += p[2] * c.weight
- pa += p[3] * c.weight
- }
- $clampToAlpha
- $outputf[dr.Min.X + int(dx), dr.Min.Y + int(adr.Min.Y + dy), ftou, p, s.invTotalWeight]
- $tweakD
- }
- }
- }
- `
-
- codeKernelTransformLeaf = `
- func (q *Kernel) transform_$dTypeRN_$sTypeRN$sratio_$op(dst $dType, dr, adr image.Rectangle, d2s *f64.Aff3, src $sType, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1 + 2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1 + 2*int(math.Ceil(yHalfWidth)))
-
- $preOuter
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y + int(dy)) + 0.5
- $preInner
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { $tweakDx
- dxf := float64(dr.Min.X + int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx - ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky - iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb, pa float64 $tweakVarP
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky - iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx - ix] * yWeight; w != 0 {
- p += $srcf[kx, ky] * w
- }
- }
- }
- }
- $clampToAlpha
- $outputf[dr.Min.X + int(dx), dr.Min.Y + int(dy), fffftou, p, 1]
- }
- }
- }
- `
-)
diff --git a/vendor/golang.org/x/image/draw/go1_8.go b/vendor/golang.org/x/image/draw/go1_8.go
deleted file mode 100644
index ec192b7..0000000
--- a/vendor/golang.org/x/image/draw/go1_8.go
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build !go1.9,!go1.8.typealias
-
-package draw
-
-import (
- "image"
- "image/color"
- "image/draw"
-)
-
-// Drawer contains the Draw method.
-type Drawer interface {
- // Draw aligns r.Min in dst with sp in src and then replaces the
- // rectangle r in dst with the result of drawing src on dst.
- Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point)
-}
-
-// Image is an image.Image with a Set method to change a single pixel.
-type Image interface {
- image.Image
- Set(x, y int, c color.Color)
-}
-
-// Op is a Porter-Duff compositing operator.
-type Op int
-
-const (
- // Over specifies ``(src in mask) over dst''.
- Over Op = Op(draw.Over)
- // Src specifies ``src in mask''.
- Src Op = Op(draw.Src)
-)
-
-// Draw implements the Drawer interface by calling the Draw function with
-// this Op.
-func (op Op) Draw(dst Image, r image.Rectangle, src image.Image, sp image.Point) {
- (draw.Op(op)).Draw(dst, r, src, sp)
-}
-
-// Quantizer produces a palette for an image.
-type Quantizer interface {
- // Quantize appends up to cap(p) - len(p) colors to p and returns the
- // updated palette suitable for converting m to a paletted image.
- Quantize(p color.Palette, m image.Image) color.Palette
-}
diff --git a/vendor/golang.org/x/image/draw/go1_9.go b/vendor/golang.org/x/image/draw/go1_9.go
deleted file mode 100644
index fc548e9..0000000
--- a/vendor/golang.org/x/image/draw/go1_9.go
+++ /dev/null
@@ -1,57 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build go1.9 go1.8.typealias
-
-package draw
-
-import (
- "image/draw"
-)
-
-// We use type aliases (new in Go 1.9) for the exported names from the standard
-// library's image/draw package. This is not merely syntactic sugar for
-//
-// type Drawer draw.Drawer
-//
-// as aliasing means that the types in this package, such as draw.Image and
-// draw.Op, are identical to the corresponding draw.Image and draw.Op types in
-// the standard library. In comparison, prior to Go 1.9, the code in go1_8.go
-// defines new types that mimic the old but are different types.
-//
-// The package documentation, in draw.go, explicitly gives the intent of this
-// package:
-//
-// This package is a superset of and a drop-in replacement for the
-// image/draw package in the standard library.
-//
-// Drop-in replacement means that I can replace all of my "image/draw" imports
-// with "golang.org/x/image/draw", to access additional features in this
-// package, and no further changes are required. That's mostly true, but not
-// completely true unless we use type aliases.
-//
-// Without type aliases, users might need to import both "image/draw" and
-// "golang.org/x/image/draw" in order to convert from two conceptually
-// equivalent but different (from the compiler's point of view) types, such as
-// from one draw.Op type to another draw.Op type, to satisfy some other
-// interface or function signature.
-
-// Drawer contains the Draw method.
-type Drawer = draw.Drawer
-
-// Image is an image.Image with a Set method to change a single pixel.
-type Image = draw.Image
-
-// Op is a Porter-Duff compositing operator.
-type Op = draw.Op
-
-const (
- // Over specifies ``(src in mask) over dst''.
- Over Op = draw.Over
- // Src specifies ``src in mask''.
- Src Op = draw.Src
-)
-
-// Quantizer produces a palette for an image.
-type Quantizer = draw.Quantizer
diff --git a/vendor/golang.org/x/image/draw/impl.go b/vendor/golang.org/x/image/draw/impl.go
deleted file mode 100644
index 75498ad..0000000
--- a/vendor/golang.org/x/image/draw/impl.go
+++ /dev/null
@@ -1,6670 +0,0 @@
-// generated by "go run gen.go". DO NOT EDIT.
-
-package draw
-
-import (
- "image"
- "image/color"
- "math"
-
- "golang.org/x/image/math/f64"
-)
-
-func (z nnInterpolator) Scale(dst Image, dr image.Rectangle, src image.Image, sr image.Rectangle, op Op, opts *Options) {
- // Try to simplify a Scale to a Copy when DstMask is not specified.
- // If DstMask is not nil, Copy will call Scale back with same dr and sr, and cause stack overflow.
- if dr.Size() == sr.Size() && (opts == nil || opts.DstMask == nil) {
- Copy(dst, dr.Min, src, sr, op, opts)
- return
- }
-
- var o Options
- if opts != nil {
- o = *opts
- }
-
- // adr is the affected destination pixels.
- adr := dst.Bounds().Intersect(dr)
- adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP)
- if adr.Empty() || sr.Empty() {
- return
- }
- // Make adr relative to dr.Min.
- adr = adr.Sub(dr.Min)
- if op == Over && o.SrcMask == nil && opaque(src) {
- op = Src
- }
-
- // sr is the source pixels. If it extends beyond the src bounds,
- // we cannot use the type-specific fast paths, as they access
- // the Pix fields directly without bounds checking.
- //
- // Similarly, the fast paths assume that the masks are nil.
- if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) {
- switch op {
- case Over:
- z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o)
- case Src:
- z.scale_Image_Image_Src(dst, dr, adr, src, sr, &o)
- }
- } else if _, ok := src.(*image.Uniform); ok {
- Draw(dst, dr, src, src.Bounds().Min, op)
- } else {
- switch op {
- case Over:
- switch dst := dst.(type) {
- case *image.RGBA:
- switch src := src.(type) {
- case *image.NRGBA:
- z.scale_RGBA_NRGBA_Over(dst, dr, adr, src, sr, &o)
- case *image.RGBA:
- z.scale_RGBA_RGBA_Over(dst, dr, adr, src, sr, &o)
- default:
- z.scale_RGBA_Image_Over(dst, dr, adr, src, sr, &o)
- }
- default:
- switch src := src.(type) {
- default:
- z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o)
- }
- }
- case Src:
- switch dst := dst.(type) {
- case *image.RGBA:
- switch src := src.(type) {
- case *image.Gray:
- z.scale_RGBA_Gray_Src(dst, dr, adr, src, sr, &o)
- case *image.NRGBA:
- z.scale_RGBA_NRGBA_Src(dst, dr, adr, src, sr, &o)
- case *image.RGBA:
- z.scale_RGBA_RGBA_Src(dst, dr, adr, src, sr, &o)
- case *image.YCbCr:
- switch src.SubsampleRatio {
- default:
- z.scale_RGBA_Image_Src(dst, dr, adr, src, sr, &o)
- case image.YCbCrSubsampleRatio444:
- z.scale_RGBA_YCbCr444_Src(dst, dr, adr, src, sr, &o)
- case image.YCbCrSubsampleRatio422:
- z.scale_RGBA_YCbCr422_Src(dst, dr, adr, src, sr, &o)
- case image.YCbCrSubsampleRatio420:
- z.scale_RGBA_YCbCr420_Src(dst, dr, adr, src, sr, &o)
- case image.YCbCrSubsampleRatio440:
- z.scale_RGBA_YCbCr440_Src(dst, dr, adr, src, sr, &o)
- }
- default:
- z.scale_RGBA_Image_Src(dst, dr, adr, src, sr, &o)
- }
- default:
- switch src := src.(type) {
- default:
- z.scale_Image_Image_Src(dst, dr, adr, src, sr, &o)
- }
- }
- }
- }
-}
-
-func (z nnInterpolator) Transform(dst Image, s2d f64.Aff3, src image.Image, sr image.Rectangle, op Op, opts *Options) {
- // Try to simplify a Transform to a Copy.
- if s2d[0] == 1 && s2d[1] == 0 && s2d[3] == 0 && s2d[4] == 1 {
- dx := int(s2d[2])
- dy := int(s2d[5])
- if float64(dx) == s2d[2] && float64(dy) == s2d[5] {
- Copy(dst, image.Point{X: sr.Min.X + dx, Y: sr.Min.X + dy}, src, sr, op, opts)
- return
- }
- }
-
- var o Options
- if opts != nil {
- o = *opts
- }
-
- dr := transformRect(&s2d, &sr)
- // adr is the affected destination pixels.
- adr := dst.Bounds().Intersect(dr)
- adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP)
- if adr.Empty() || sr.Empty() {
- return
- }
- if op == Over && o.SrcMask == nil && opaque(src) {
- op = Src
- }
-
- d2s := invert(&s2d)
- // bias is a translation of the mapping from dst coordinates to src
- // coordinates such that the latter temporarily have non-negative X
- // and Y coordinates. This allows us to write int(f) instead of
- // int(math.Floor(f)), since "round to zero" and "round down" are
- // equivalent when f >= 0, but the former is much cheaper. The X--
- // and Y-- are because the TransformLeaf methods have a "sx -= 0.5"
- // adjustment.
- bias := transformRect(&d2s, &adr).Min
- bias.X--
- bias.Y--
- d2s[2] -= float64(bias.X)
- d2s[5] -= float64(bias.Y)
- // Make adr relative to dr.Min.
- adr = adr.Sub(dr.Min)
- // sr is the source pixels. If it extends beyond the src bounds,
- // we cannot use the type-specific fast paths, as they access
- // the Pix fields directly without bounds checking.
- //
- // Similarly, the fast paths assume that the masks are nil.
- if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) {
- switch op {
- case Over:
- z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
- case Src:
- z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- } else if u, ok := src.(*image.Uniform); ok {
- transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op)
- } else {
- switch op {
- case Over:
- switch dst := dst.(type) {
- case *image.RGBA:
- switch src := src.(type) {
- case *image.NRGBA:
- z.transform_RGBA_NRGBA_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
- case *image.RGBA:
- z.transform_RGBA_RGBA_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
- default:
- z.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- default:
- switch src := src.(type) {
- default:
- z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- }
- case Src:
- switch dst := dst.(type) {
- case *image.RGBA:
- switch src := src.(type) {
- case *image.Gray:
- z.transform_RGBA_Gray_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case *image.NRGBA:
- z.transform_RGBA_NRGBA_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case *image.RGBA:
- z.transform_RGBA_RGBA_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case *image.YCbCr:
- switch src.SubsampleRatio {
- default:
- z.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case image.YCbCrSubsampleRatio444:
- z.transform_RGBA_YCbCr444_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case image.YCbCrSubsampleRatio422:
- z.transform_RGBA_YCbCr422_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case image.YCbCrSubsampleRatio420:
- z.transform_RGBA_YCbCr420_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case image.YCbCrSubsampleRatio440:
- z.transform_RGBA_YCbCr440_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- default:
- z.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- default:
- switch src := src.(type) {
- default:
- z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- }
- }
- }
-}
-
-func (nnInterpolator) scale_RGBA_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.Gray, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(sx) - src.Rect.Min.X)
- pr := uint32(src.Pix[pi]) * 0x101
- out := uint8(pr >> 8)
- dst.Pix[d+0] = out
- dst.Pix[d+1] = out
- dst.Pix[d+2] = out
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (nnInterpolator) scale_RGBA_NRGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.NRGBA, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4
- pa := uint32(src.Pix[pi+3]) * 0x101
- pr := uint32(src.Pix[pi+0]) * pa / 0xff
- pg := uint32(src.Pix[pi+1]) * pa / 0xff
- pb := uint32(src.Pix[pi+2]) * pa / 0xff
- pa1 := (0xffff - pa) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-}
-
-func (nnInterpolator) scale_RGBA_NRGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.NRGBA, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4
- pa := uint32(src.Pix[pi+3]) * 0x101
- pr := uint32(src.Pix[pi+0]) * pa / 0xff
- pg := uint32(src.Pix[pi+1]) * pa / 0xff
- pb := uint32(src.Pix[pi+2]) * pa / 0xff
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = uint8(pa >> 8)
- }
- }
-}
-
-func (nnInterpolator) scale_RGBA_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.RGBA, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4
- pr := uint32(src.Pix[pi+0]) * 0x101
- pg := uint32(src.Pix[pi+1]) * 0x101
- pb := uint32(src.Pix[pi+2]) * 0x101
- pa := uint32(src.Pix[pi+3]) * 0x101
- pa1 := (0xffff - pa) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-}
-
-func (nnInterpolator) scale_RGBA_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.RGBA, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4
- pr := uint32(src.Pix[pi+0]) * 0x101
- pg := uint32(src.Pix[pi+1]) * 0x101
- pb := uint32(src.Pix[pi+2]) * 0x101
- pa := uint32(src.Pix[pi+3]) * 0x101
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = uint8(pa >> 8)
- }
- }
-}
-
-func (nnInterpolator) scale_RGBA_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
- pj := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pr := (pyy1 + 91881*pcr1) >> 8
- pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pb := (pyy1 + 116130*pcb1) >> 8
- if pr < 0 {
- pr = 0
- } else if pr > 0xffff {
- pr = 0xffff
- }
- if pg < 0 {
- pg = 0
- } else if pg > 0xffff {
- pg = 0xffff
- }
- if pb < 0 {
- pb = 0
- } else if pb > 0xffff {
- pb = 0xffff
- }
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (nnInterpolator) scale_RGBA_YCbCr422_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
- pj := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pr := (pyy1 + 91881*pcr1) >> 8
- pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pb := (pyy1 + 116130*pcb1) >> 8
- if pr < 0 {
- pr = 0
- } else if pr > 0xffff {
- pr = 0xffff
- }
- if pg < 0 {
- pg = 0
- } else if pg > 0xffff {
- pg = 0xffff
- }
- if pb < 0 {
- pb = 0
- } else if pb > 0xffff {
- pb = 0xffff
- }
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (nnInterpolator) scale_RGBA_YCbCr420_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
- pj := ((sr.Min.Y+int(sy))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pr := (pyy1 + 91881*pcr1) >> 8
- pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pb := (pyy1 + 116130*pcb1) >> 8
- if pr < 0 {
- pr = 0
- } else if pr > 0xffff {
- pr = 0xffff
- }
- if pg < 0 {
- pg = 0
- } else if pg > 0xffff {
- pg = 0xffff
- }
- if pb < 0 {
- pb = 0
- } else if pb > 0xffff {
- pb = 0xffff
- }
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (nnInterpolator) scale_RGBA_YCbCr440_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
- pj := ((sr.Min.Y+int(sy))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pr := (pyy1 + 91881*pcr1) >> 8
- pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pb := (pyy1 + 116130*pcb1) >> 8
- if pr < 0 {
- pr = 0
- } else if pr > 0xffff {
- pr = 0xffff
- }
- if pg < 0 {
- pg = 0
- } else if pg > 0xffff {
- pg = 0xffff
- }
- if pb < 0 {
- pb = 0
- } else if pb > 0xffff {
- pb = 0xffff
- }
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (nnInterpolator) scale_RGBA_Image_Over(dst *image.RGBA, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pr, pg, pb, pa := src.At(sr.Min.X+int(sx), sr.Min.Y+int(sy)).RGBA()
- pa1 := (0xffff - pa) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-}
-
-func (nnInterpolator) scale_RGBA_Image_Src(dst *image.RGBA, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pr, pg, pb, pa := src.At(sr.Min.X+int(sx), sr.Min.Y+int(sy)).RGBA()
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = uint8(pa >> 8)
- }
- }
-}
-
-func (nnInterpolator) scale_Image_Image_Over(dst Image, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- srcMask, smp := opts.SrcMask, opts.SrcMaskP
- dstMask, dmp := opts.DstMask, opts.DstMaskP
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pr, pg, pb, pa := src.At(sr.Min.X+int(sx), sr.Min.Y+int(sy)).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx), smp.Y+sr.Min.Y+int(sy)).RGBA()
- pr = pr * ma / 0xffff
- pg = pg * ma / 0xffff
- pb = pb * ma / 0xffff
- pa = pa * ma / 0xffff
- }
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
- if dstMask != nil {
- _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA()
- pr = pr * ma / 0xffff
- pg = pg * ma / 0xffff
- pb = pb * ma / 0xffff
- pa = pa * ma / 0xffff
- }
- pa1 := 0xffff - pa
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- }
- }
-}
-
-func (nnInterpolator) scale_Image_Image_Src(dst Image, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
- dw2 := uint64(dr.Dx()) * 2
- dh2 := uint64(dr.Dy()) * 2
- sw := uint64(sr.Dx())
- sh := uint64(sr.Dy())
- srcMask, smp := opts.SrcMask, opts.SrcMaskP
- dstMask, dmp := opts.DstMask, opts.DstMaskP
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (2*uint64(dy) + 1) * sh / dh2
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- sx := (2*uint64(dx) + 1) * sw / dw2
- pr, pg, pb, pa := src.At(sr.Min.X+int(sx), sr.Min.Y+int(sy)).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx), smp.Y+sr.Min.Y+int(sy)).RGBA()
- pr = pr * ma / 0xffff
- pg = pg * ma / 0xffff
- pb = pb * ma / 0xffff
- pa = pa * ma / 0xffff
- }
- if dstMask != nil {
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
- _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA()
- pr = pr * ma / 0xffff
- pg = pg * ma / 0xffff
- pb = pb * ma / 0xffff
- pa = pa * ma / 0xffff
- pa1 := 0xffff - ma
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- } else {
- dstColorRGBA64.R = uint16(pr)
- dstColorRGBA64.G = uint16(pg)
- dstColorRGBA64.B = uint16(pb)
- dstColorRGBA64.A = uint16(pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- }
- }
- }
-}
-
-func (nnInterpolator) transform_RGBA_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.Gray, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0 - src.Rect.Min.X)
- pr := uint32(src.Pix[pi]) * 0x101
- out := uint8(pr >> 8)
- dst.Pix[d+0] = out
- dst.Pix[d+1] = out
- dst.Pix[d+2] = out
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (nnInterpolator) transform_RGBA_NRGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
- pa := uint32(src.Pix[pi+3]) * 0x101
- pr := uint32(src.Pix[pi+0]) * pa / 0xff
- pg := uint32(src.Pix[pi+1]) * pa / 0xff
- pb := uint32(src.Pix[pi+2]) * pa / 0xff
- pa1 := (0xffff - pa) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-}
-
-func (nnInterpolator) transform_RGBA_NRGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
- pa := uint32(src.Pix[pi+3]) * 0x101
- pr := uint32(src.Pix[pi+0]) * pa / 0xff
- pg := uint32(src.Pix[pi+1]) * pa / 0xff
- pb := uint32(src.Pix[pi+2]) * pa / 0xff
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = uint8(pa >> 8)
- }
- }
-}
-
-func (nnInterpolator) transform_RGBA_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
- pr := uint32(src.Pix[pi+0]) * 0x101
- pg := uint32(src.Pix[pi+1]) * 0x101
- pb := uint32(src.Pix[pi+2]) * 0x101
- pa := uint32(src.Pix[pi+3]) * 0x101
- pa1 := (0xffff - pa) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-}
-
-func (nnInterpolator) transform_RGBA_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
- pr := uint32(src.Pix[pi+0]) * 0x101
- pg := uint32(src.Pix[pi+1]) * 0x101
- pb := uint32(src.Pix[pi+2]) * 0x101
- pa := uint32(src.Pix[pi+3]) * 0x101
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = uint8(pa >> 8)
- }
- }
-}
-
-func (nnInterpolator) transform_RGBA_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pi := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- pj := (sy0-src.Rect.Min.Y)*src.CStride + (sx0 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pr := (pyy1 + 91881*pcr1) >> 8
- pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pb := (pyy1 + 116130*pcb1) >> 8
- if pr < 0 {
- pr = 0
- } else if pr > 0xffff {
- pr = 0xffff
- }
- if pg < 0 {
- pg = 0
- } else if pg > 0xffff {
- pg = 0xffff
- }
- if pb < 0 {
- pb = 0
- } else if pb > 0xffff {
- pb = 0xffff
- }
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (nnInterpolator) transform_RGBA_YCbCr422_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pi := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- pj := (sy0-src.Rect.Min.Y)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pr := (pyy1 + 91881*pcr1) >> 8
- pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pb := (pyy1 + 116130*pcb1) >> 8
- if pr < 0 {
- pr = 0
- } else if pr > 0xffff {
- pr = 0xffff
- }
- if pg < 0 {
- pg = 0
- } else if pg > 0xffff {
- pg = 0xffff
- }
- if pb < 0 {
- pb = 0
- } else if pb > 0xffff {
- pb = 0xffff
- }
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (nnInterpolator) transform_RGBA_YCbCr420_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pi := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- pj := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pr := (pyy1 + 91881*pcr1) >> 8
- pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pb := (pyy1 + 116130*pcb1) >> 8
- if pr < 0 {
- pr = 0
- } else if pr > 0xffff {
- pr = 0xffff
- }
- if pg < 0 {
- pg = 0
- } else if pg > 0xffff {
- pg = 0xffff
- }
- if pb < 0 {
- pb = 0
- } else if pb > 0xffff {
- pb = 0xffff
- }
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (nnInterpolator) transform_RGBA_YCbCr440_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pi := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- pj := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + (sx0 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pr := (pyy1 + 91881*pcr1) >> 8
- pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pb := (pyy1 + 116130*pcb1) >> 8
- if pr < 0 {
- pr = 0
- } else if pr > 0xffff {
- pr = 0xffff
- }
- if pg < 0 {
- pg = 0
- } else if pg > 0xffff {
- pg = 0xffff
- }
- if pb < 0 {
- pb = 0
- } else if pb > 0xffff {
- pb = 0xffff
- }
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (nnInterpolator) transform_RGBA_Image_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pr, pg, pb, pa := src.At(sx0, sy0).RGBA()
- pa1 := (0xffff - pa) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-}
-
-func (nnInterpolator) transform_RGBA_Image_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pr, pg, pb, pa := src.At(sx0, sy0).RGBA()
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = uint8(pa >> 8)
- }
- }
-}
-
-func (nnInterpolator) transform_Image_Image_Over(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) {
- srcMask, smp := opts.SrcMask, opts.SrcMaskP
- dstMask, dmp := opts.DstMask, opts.DstMaskP
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pr, pg, pb, pa := src.At(sx0, sy0).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sx0, smp.Y+sy0).RGBA()
- pr = pr * ma / 0xffff
- pg = pg * ma / 0xffff
- pb = pb * ma / 0xffff
- pa = pa * ma / 0xffff
- }
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
- if dstMask != nil {
- _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA()
- pr = pr * ma / 0xffff
- pg = pg * ma / 0xffff
- pb = pb * ma / 0xffff
- pa = pa * ma / 0xffff
- }
- pa1 := 0xffff - pa
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- }
- }
-}
-
-func (nnInterpolator) transform_Image_Image_Src(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) {
- srcMask, smp := opts.SrcMask, opts.SrcMaskP
- dstMask, dmp := opts.DstMask, opts.DstMaskP
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- pr, pg, pb, pa := src.At(sx0, sy0).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sx0, smp.Y+sy0).RGBA()
- pr = pr * ma / 0xffff
- pg = pg * ma / 0xffff
- pb = pb * ma / 0xffff
- pa = pa * ma / 0xffff
- }
- if dstMask != nil {
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
- _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA()
- pr = pr * ma / 0xffff
- pg = pg * ma / 0xffff
- pb = pb * ma / 0xffff
- pa = pa * ma / 0xffff
- pa1 := 0xffff - ma
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- } else {
- dstColorRGBA64.R = uint16(pr)
- dstColorRGBA64.G = uint16(pg)
- dstColorRGBA64.B = uint16(pb)
- dstColorRGBA64.A = uint16(pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- }
- }
- }
-}
-
-func (z ablInterpolator) Scale(dst Image, dr image.Rectangle, src image.Image, sr image.Rectangle, op Op, opts *Options) {
- // Try to simplify a Scale to a Copy when DstMask is not specified.
- // If DstMask is not nil, Copy will call Scale back with same dr and sr, and cause stack overflow.
- if dr.Size() == sr.Size() && (opts == nil || opts.DstMask == nil) {
- Copy(dst, dr.Min, src, sr, op, opts)
- return
- }
-
- var o Options
- if opts != nil {
- o = *opts
- }
-
- // adr is the affected destination pixels.
- adr := dst.Bounds().Intersect(dr)
- adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP)
- if adr.Empty() || sr.Empty() {
- return
- }
- // Make adr relative to dr.Min.
- adr = adr.Sub(dr.Min)
- if op == Over && o.SrcMask == nil && opaque(src) {
- op = Src
- }
-
- // sr is the source pixels. If it extends beyond the src bounds,
- // we cannot use the type-specific fast paths, as they access
- // the Pix fields directly without bounds checking.
- //
- // Similarly, the fast paths assume that the masks are nil.
- if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) {
- switch op {
- case Over:
- z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o)
- case Src:
- z.scale_Image_Image_Src(dst, dr, adr, src, sr, &o)
- }
- } else if _, ok := src.(*image.Uniform); ok {
- Draw(dst, dr, src, src.Bounds().Min, op)
- } else {
- switch op {
- case Over:
- switch dst := dst.(type) {
- case *image.RGBA:
- switch src := src.(type) {
- case *image.NRGBA:
- z.scale_RGBA_NRGBA_Over(dst, dr, adr, src, sr, &o)
- case *image.RGBA:
- z.scale_RGBA_RGBA_Over(dst, dr, adr, src, sr, &o)
- default:
- z.scale_RGBA_Image_Over(dst, dr, adr, src, sr, &o)
- }
- default:
- switch src := src.(type) {
- default:
- z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o)
- }
- }
- case Src:
- switch dst := dst.(type) {
- case *image.RGBA:
- switch src := src.(type) {
- case *image.Gray:
- z.scale_RGBA_Gray_Src(dst, dr, adr, src, sr, &o)
- case *image.NRGBA:
- z.scale_RGBA_NRGBA_Src(dst, dr, adr, src, sr, &o)
- case *image.RGBA:
- z.scale_RGBA_RGBA_Src(dst, dr, adr, src, sr, &o)
- case *image.YCbCr:
- switch src.SubsampleRatio {
- default:
- z.scale_RGBA_Image_Src(dst, dr, adr, src, sr, &o)
- case image.YCbCrSubsampleRatio444:
- z.scale_RGBA_YCbCr444_Src(dst, dr, adr, src, sr, &o)
- case image.YCbCrSubsampleRatio422:
- z.scale_RGBA_YCbCr422_Src(dst, dr, adr, src, sr, &o)
- case image.YCbCrSubsampleRatio420:
- z.scale_RGBA_YCbCr420_Src(dst, dr, adr, src, sr, &o)
- case image.YCbCrSubsampleRatio440:
- z.scale_RGBA_YCbCr440_Src(dst, dr, adr, src, sr, &o)
- }
- default:
- z.scale_RGBA_Image_Src(dst, dr, adr, src, sr, &o)
- }
- default:
- switch src := src.(type) {
- default:
- z.scale_Image_Image_Src(dst, dr, adr, src, sr, &o)
- }
- }
- }
- }
-}
-
-func (z ablInterpolator) Transform(dst Image, s2d f64.Aff3, src image.Image, sr image.Rectangle, op Op, opts *Options) {
- // Try to simplify a Transform to a Copy.
- if s2d[0] == 1 && s2d[1] == 0 && s2d[3] == 0 && s2d[4] == 1 {
- dx := int(s2d[2])
- dy := int(s2d[5])
- if float64(dx) == s2d[2] && float64(dy) == s2d[5] {
- Copy(dst, image.Point{X: sr.Min.X + dx, Y: sr.Min.X + dy}, src, sr, op, opts)
- return
- }
- }
-
- var o Options
- if opts != nil {
- o = *opts
- }
-
- dr := transformRect(&s2d, &sr)
- // adr is the affected destination pixels.
- adr := dst.Bounds().Intersect(dr)
- adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP)
- if adr.Empty() || sr.Empty() {
- return
- }
- if op == Over && o.SrcMask == nil && opaque(src) {
- op = Src
- }
-
- d2s := invert(&s2d)
- // bias is a translation of the mapping from dst coordinates to src
- // coordinates such that the latter temporarily have non-negative X
- // and Y coordinates. This allows us to write int(f) instead of
- // int(math.Floor(f)), since "round to zero" and "round down" are
- // equivalent when f >= 0, but the former is much cheaper. The X--
- // and Y-- are because the TransformLeaf methods have a "sx -= 0.5"
- // adjustment.
- bias := transformRect(&d2s, &adr).Min
- bias.X--
- bias.Y--
- d2s[2] -= float64(bias.X)
- d2s[5] -= float64(bias.Y)
- // Make adr relative to dr.Min.
- adr = adr.Sub(dr.Min)
- // sr is the source pixels. If it extends beyond the src bounds,
- // we cannot use the type-specific fast paths, as they access
- // the Pix fields directly without bounds checking.
- //
- // Similarly, the fast paths assume that the masks are nil.
- if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) {
- switch op {
- case Over:
- z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
- case Src:
- z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- } else if u, ok := src.(*image.Uniform); ok {
- transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op)
- } else {
- switch op {
- case Over:
- switch dst := dst.(type) {
- case *image.RGBA:
- switch src := src.(type) {
- case *image.NRGBA:
- z.transform_RGBA_NRGBA_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
- case *image.RGBA:
- z.transform_RGBA_RGBA_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
- default:
- z.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- default:
- switch src := src.(type) {
- default:
- z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- }
- case Src:
- switch dst := dst.(type) {
- case *image.RGBA:
- switch src := src.(type) {
- case *image.Gray:
- z.transform_RGBA_Gray_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case *image.NRGBA:
- z.transform_RGBA_NRGBA_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case *image.RGBA:
- z.transform_RGBA_RGBA_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case *image.YCbCr:
- switch src.SubsampleRatio {
- default:
- z.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case image.YCbCrSubsampleRatio444:
- z.transform_RGBA_YCbCr444_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case image.YCbCrSubsampleRatio422:
- z.transform_RGBA_YCbCr422_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case image.YCbCrSubsampleRatio420:
- z.transform_RGBA_YCbCr420_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- case image.YCbCrSubsampleRatio440:
- z.transform_RGBA_YCbCr440_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- default:
- z.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- default:
- switch src := src.(type) {
- default:
- z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
- }
- }
- }
- }
-}
-
-func (ablInterpolator) scale_RGBA_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.Gray, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s00ru := uint32(src.Pix[s00i]) * 0x101
- s00r := float64(s00ru)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s10ru := uint32(src.Pix[s10i]) * 0x101
- s10r := float64(s10ru)
- s10r = xFrac1*s00r + xFrac0*s10r
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s01ru := uint32(src.Pix[s01i]) * 0x101
- s01r := float64(s01ru)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s11ru := uint32(src.Pix[s11i]) * 0x101
- s11r := float64(s11ru)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11r = yFrac1*s10r + yFrac0*s11r
- pr := uint32(s11r)
- out := uint8(pr >> 8)
- dst.Pix[d+0] = out
- dst.Pix[d+1] = out
- dst.Pix[d+2] = out
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (ablInterpolator) scale_RGBA_NRGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.NRGBA, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4
- s00au := uint32(src.Pix[s00i+3]) * 0x101
- s00ru := uint32(src.Pix[s00i+0]) * s00au / 0xff
- s00gu := uint32(src.Pix[s00i+1]) * s00au / 0xff
- s00bu := uint32(src.Pix[s00i+2]) * s00au / 0xff
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4
- s10au := uint32(src.Pix[s10i+3]) * 0x101
- s10ru := uint32(src.Pix[s10i+0]) * s10au / 0xff
- s10gu := uint32(src.Pix[s10i+1]) * s10au / 0xff
- s10bu := uint32(src.Pix[s10i+2]) * s10au / 0xff
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4
- s01au := uint32(src.Pix[s01i+3]) * 0x101
- s01ru := uint32(src.Pix[s01i+0]) * s01au / 0xff
- s01gu := uint32(src.Pix[s01i+1]) * s01au / 0xff
- s01bu := uint32(src.Pix[s01i+2]) * s01au / 0xff
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4
- s11au := uint32(src.Pix[s11i+3]) * 0x101
- s11ru := uint32(src.Pix[s11i+0]) * s11au / 0xff
- s11gu := uint32(src.Pix[s11i+1]) * s11au / 0xff
- s11bu := uint32(src.Pix[s11i+2]) * s11au / 0xff
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- pa1 := (0xffff - pa) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-}
-
-func (ablInterpolator) scale_RGBA_NRGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.NRGBA, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4
- s00au := uint32(src.Pix[s00i+3]) * 0x101
- s00ru := uint32(src.Pix[s00i+0]) * s00au / 0xff
- s00gu := uint32(src.Pix[s00i+1]) * s00au / 0xff
- s00bu := uint32(src.Pix[s00i+2]) * s00au / 0xff
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4
- s10au := uint32(src.Pix[s10i+3]) * 0x101
- s10ru := uint32(src.Pix[s10i+0]) * s10au / 0xff
- s10gu := uint32(src.Pix[s10i+1]) * s10au / 0xff
- s10bu := uint32(src.Pix[s10i+2]) * s10au / 0xff
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4
- s01au := uint32(src.Pix[s01i+3]) * 0x101
- s01ru := uint32(src.Pix[s01i+0]) * s01au / 0xff
- s01gu := uint32(src.Pix[s01i+1]) * s01au / 0xff
- s01bu := uint32(src.Pix[s01i+2]) * s01au / 0xff
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4
- s11au := uint32(src.Pix[s11i+3]) * 0x101
- s11ru := uint32(src.Pix[s11i+0]) * s11au / 0xff
- s11gu := uint32(src.Pix[s11i+1]) * s11au / 0xff
- s11bu := uint32(src.Pix[s11i+2]) * s11au / 0xff
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = uint8(pa >> 8)
- }
- }
-}
-
-func (ablInterpolator) scale_RGBA_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.RGBA, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4
- s00ru := uint32(src.Pix[s00i+0]) * 0x101
- s00gu := uint32(src.Pix[s00i+1]) * 0x101
- s00bu := uint32(src.Pix[s00i+2]) * 0x101
- s00au := uint32(src.Pix[s00i+3]) * 0x101
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4
- s10ru := uint32(src.Pix[s10i+0]) * 0x101
- s10gu := uint32(src.Pix[s10i+1]) * 0x101
- s10bu := uint32(src.Pix[s10i+2]) * 0x101
- s10au := uint32(src.Pix[s10i+3]) * 0x101
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4
- s01ru := uint32(src.Pix[s01i+0]) * 0x101
- s01gu := uint32(src.Pix[s01i+1]) * 0x101
- s01bu := uint32(src.Pix[s01i+2]) * 0x101
- s01au := uint32(src.Pix[s01i+3]) * 0x101
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4
- s11ru := uint32(src.Pix[s11i+0]) * 0x101
- s11gu := uint32(src.Pix[s11i+1]) * 0x101
- s11bu := uint32(src.Pix[s11i+2]) * 0x101
- s11au := uint32(src.Pix[s11i+3]) * 0x101
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- pa1 := (0xffff - pa) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-}
-
-func (ablInterpolator) scale_RGBA_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.RGBA, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4
- s00ru := uint32(src.Pix[s00i+0]) * 0x101
- s00gu := uint32(src.Pix[s00i+1]) * 0x101
- s00bu := uint32(src.Pix[s00i+2]) * 0x101
- s00au := uint32(src.Pix[s00i+3]) * 0x101
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4
- s10ru := uint32(src.Pix[s10i+0]) * 0x101
- s10gu := uint32(src.Pix[s10i+1]) * 0x101
- s10bu := uint32(src.Pix[s10i+2]) * 0x101
- s10au := uint32(src.Pix[s10i+3]) * 0x101
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4
- s01ru := uint32(src.Pix[s01i+0]) * 0x101
- s01gu := uint32(src.Pix[s01i+1]) * 0x101
- s01bu := uint32(src.Pix[s01i+2]) * 0x101
- s01au := uint32(src.Pix[s01i+3]) * 0x101
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4
- s11ru := uint32(src.Pix[s11i+0]) * 0x101
- s11gu := uint32(src.Pix[s11i+1]) * 0x101
- s11bu := uint32(src.Pix[s11i+2]) * 0x101
- s11au := uint32(src.Pix[s11i+3]) * 0x101
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = uint8(pa >> 8)
- }
- }
-}
-
-func (ablInterpolator) scale_RGBA_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s00j := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i]) * 0x10101
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s10j := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i]) * 0x10101
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s01j := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i]) * 0x10101
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s11j := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i]) * 0x10101
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (ablInterpolator) scale_RGBA_YCbCr422_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s00j := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx0))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i]) * 0x10101
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s10j := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx1))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i]) * 0x10101
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s01j := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx0))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i]) * 0x10101
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s11j := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx1))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i]) * 0x10101
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (ablInterpolator) scale_RGBA_YCbCr420_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s00j := ((sr.Min.Y+int(sy0))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx0))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i]) * 0x10101
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s10j := ((sr.Min.Y+int(sy0))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx1))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i]) * 0x10101
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s01j := ((sr.Min.Y+int(sy1))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx0))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i]) * 0x10101
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s11j := ((sr.Min.Y+int(sy1))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx1))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i]) * 0x10101
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (ablInterpolator) scale_RGBA_YCbCr440_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s00j := ((sr.Min.Y+int(sy0))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i]) * 0x10101
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s10j := ((sr.Min.Y+int(sy0))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i]) * 0x10101
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s01j := ((sr.Min.Y+int(sy1))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i]) * 0x10101
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s11j := ((sr.Min.Y+int(sy1))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i]) * 0x10101
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (ablInterpolator) scale_RGBA_Image_Over(dst *image.RGBA, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00ru, s00gu, s00bu, s00au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy0)).RGBA()
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10ru, s10gu, s10bu, s10au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy0)).RGBA()
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01ru, s01gu, s01bu, s01au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy1)).RGBA()
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11ru, s11gu, s11bu, s11au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy1)).RGBA()
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- pa1 := (0xffff - pa) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-}
-
-func (ablInterpolator) scale_RGBA_Image_Src(dst *image.RGBA, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00ru, s00gu, s00bu, s00au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy0)).RGBA()
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10ru, s10gu, s10bu, s10au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy0)).RGBA()
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01ru, s01gu, s01bu, s01au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy1)).RGBA()
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11ru, s11gu, s11bu, s11au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy1)).RGBA()
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = uint8(pa >> 8)
- }
- }
-}
-
-func (ablInterpolator) scale_Image_Image_Over(dst Image, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
- srcMask, smp := opts.SrcMask, opts.SrcMaskP
- dstMask, dmp := opts.DstMask, opts.DstMaskP
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00ru, s00gu, s00bu, s00au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy0)).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx0), smp.Y+sr.Min.Y+int(sy0)).RGBA()
- s00ru = s00ru * ma / 0xffff
- s00gu = s00gu * ma / 0xffff
- s00bu = s00bu * ma / 0xffff
- s00au = s00au * ma / 0xffff
- }
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10ru, s10gu, s10bu, s10au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy0)).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx1), smp.Y+sr.Min.Y+int(sy0)).RGBA()
- s10ru = s10ru * ma / 0xffff
- s10gu = s10gu * ma / 0xffff
- s10bu = s10bu * ma / 0xffff
- s10au = s10au * ma / 0xffff
- }
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01ru, s01gu, s01bu, s01au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy1)).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx0), smp.Y+sr.Min.Y+int(sy1)).RGBA()
- s01ru = s01ru * ma / 0xffff
- s01gu = s01gu * ma / 0xffff
- s01bu = s01bu * ma / 0xffff
- s01au = s01au * ma / 0xffff
- }
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11ru, s11gu, s11bu, s11au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy1)).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx1), smp.Y+sr.Min.Y+int(sy1)).RGBA()
- s11ru = s11ru * ma / 0xffff
- s11gu = s11gu * ma / 0xffff
- s11bu = s11bu * ma / 0xffff
- s11au = s11au * ma / 0xffff
- }
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
- if dstMask != nil {
- _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA()
- pr = pr * ma / 0xffff
- pg = pg * ma / 0xffff
- pb = pb * ma / 0xffff
- pa = pa * ma / 0xffff
- }
- pa1 := 0xffff - pa
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- }
- }
-}
-
-func (ablInterpolator) scale_Image_Image_Src(dst Image, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
- sw := int32(sr.Dx())
- sh := int32(sr.Dy())
- yscale := float64(sh) / float64(dr.Dy())
- xscale := float64(sw) / float64(dr.Dx())
- swMinus1, shMinus1 := sw-1, sh-1
- srcMask, smp := opts.SrcMask, opts.SrcMaskP
- dstMask, dmp := opts.DstMask, opts.DstMaskP
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- sy := (float64(dy)+0.5)*yscale - 0.5
- // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if
- // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for
- // sx, below.
- sy0 := int32(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy1 := sy0 + 1
- if sy < 0 {
- sy0, sy1 = 0, 0
- yFrac0, yFrac1 = 0, 1
- } else if sy1 > shMinus1 {
- sy0, sy1 = shMinus1, shMinus1
- yFrac0, yFrac1 = 1, 0
- }
-
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- sx := (float64(dx)+0.5)*xscale - 0.5
- sx0 := int32(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx1 := sx0 + 1
- if sx < 0 {
- sx0, sx1 = 0, 0
- xFrac0, xFrac1 = 0, 1
- } else if sx1 > swMinus1 {
- sx0, sx1 = swMinus1, swMinus1
- xFrac0, xFrac1 = 1, 0
- }
-
- s00ru, s00gu, s00bu, s00au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy0)).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx0), smp.Y+sr.Min.Y+int(sy0)).RGBA()
- s00ru = s00ru * ma / 0xffff
- s00gu = s00gu * ma / 0xffff
- s00bu = s00bu * ma / 0xffff
- s00au = s00au * ma / 0xffff
- }
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10ru, s10gu, s10bu, s10au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy0)).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx1), smp.Y+sr.Min.Y+int(sy0)).RGBA()
- s10ru = s10ru * ma / 0xffff
- s10gu = s10gu * ma / 0xffff
- s10bu = s10bu * ma / 0xffff
- s10au = s10au * ma / 0xffff
- }
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01ru, s01gu, s01bu, s01au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy1)).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx0), smp.Y+sr.Min.Y+int(sy1)).RGBA()
- s01ru = s01ru * ma / 0xffff
- s01gu = s01gu * ma / 0xffff
- s01bu = s01bu * ma / 0xffff
- s01au = s01au * ma / 0xffff
- }
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11ru, s11gu, s11bu, s11au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy1)).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx1), smp.Y+sr.Min.Y+int(sy1)).RGBA()
- s11ru = s11ru * ma / 0xffff
- s11gu = s11gu * ma / 0xffff
- s11bu = s11bu * ma / 0xffff
- s11au = s11au * ma / 0xffff
- }
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- if dstMask != nil {
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
- _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA()
- pr = pr * ma / 0xffff
- pg = pg * ma / 0xffff
- pb = pb * ma / 0xffff
- pa = pa * ma / 0xffff
- pa1 := 0xffff - ma
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- } else {
- dstColorRGBA64.R = uint16(pr)
- dstColorRGBA64.G = uint16(pg)
- dstColorRGBA64.B = uint16(pb)
- dstColorRGBA64.A = uint16(pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- }
- }
- }
-}
-
-func (ablInterpolator) transform_RGBA_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.Gray, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00i := (sy0-src.Rect.Min.Y)*src.Stride + (sx0 - src.Rect.Min.X)
- s00ru := uint32(src.Pix[s00i]) * 0x101
- s00r := float64(s00ru)
- s10i := (sy0-src.Rect.Min.Y)*src.Stride + (sx1 - src.Rect.Min.X)
- s10ru := uint32(src.Pix[s10i]) * 0x101
- s10r := float64(s10ru)
- s10r = xFrac1*s00r + xFrac0*s10r
- s01i := (sy1-src.Rect.Min.Y)*src.Stride + (sx0 - src.Rect.Min.X)
- s01ru := uint32(src.Pix[s01i]) * 0x101
- s01r := float64(s01ru)
- s11i := (sy1-src.Rect.Min.Y)*src.Stride + (sx1 - src.Rect.Min.X)
- s11ru := uint32(src.Pix[s11i]) * 0x101
- s11r := float64(s11ru)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11r = yFrac1*s10r + yFrac0*s11r
- pr := uint32(s11r)
- out := uint8(pr >> 8)
- dst.Pix[d+0] = out
- dst.Pix[d+1] = out
- dst.Pix[d+2] = out
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (ablInterpolator) transform_RGBA_NRGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00i := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
- s00au := uint32(src.Pix[s00i+3]) * 0x101
- s00ru := uint32(src.Pix[s00i+0]) * s00au / 0xff
- s00gu := uint32(src.Pix[s00i+1]) * s00au / 0xff
- s00bu := uint32(src.Pix[s00i+2]) * s00au / 0xff
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10i := (sy0-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4
- s10au := uint32(src.Pix[s10i+3]) * 0x101
- s10ru := uint32(src.Pix[s10i+0]) * s10au / 0xff
- s10gu := uint32(src.Pix[s10i+1]) * s10au / 0xff
- s10bu := uint32(src.Pix[s10i+2]) * s10au / 0xff
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01i := (sy1-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
- s01au := uint32(src.Pix[s01i+3]) * 0x101
- s01ru := uint32(src.Pix[s01i+0]) * s01au / 0xff
- s01gu := uint32(src.Pix[s01i+1]) * s01au / 0xff
- s01bu := uint32(src.Pix[s01i+2]) * s01au / 0xff
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11i := (sy1-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4
- s11au := uint32(src.Pix[s11i+3]) * 0x101
- s11ru := uint32(src.Pix[s11i+0]) * s11au / 0xff
- s11gu := uint32(src.Pix[s11i+1]) * s11au / 0xff
- s11bu := uint32(src.Pix[s11i+2]) * s11au / 0xff
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- pa1 := (0xffff - pa) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-}
-
-func (ablInterpolator) transform_RGBA_NRGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00i := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
- s00au := uint32(src.Pix[s00i+3]) * 0x101
- s00ru := uint32(src.Pix[s00i+0]) * s00au / 0xff
- s00gu := uint32(src.Pix[s00i+1]) * s00au / 0xff
- s00bu := uint32(src.Pix[s00i+2]) * s00au / 0xff
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10i := (sy0-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4
- s10au := uint32(src.Pix[s10i+3]) * 0x101
- s10ru := uint32(src.Pix[s10i+0]) * s10au / 0xff
- s10gu := uint32(src.Pix[s10i+1]) * s10au / 0xff
- s10bu := uint32(src.Pix[s10i+2]) * s10au / 0xff
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01i := (sy1-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
- s01au := uint32(src.Pix[s01i+3]) * 0x101
- s01ru := uint32(src.Pix[s01i+0]) * s01au / 0xff
- s01gu := uint32(src.Pix[s01i+1]) * s01au / 0xff
- s01bu := uint32(src.Pix[s01i+2]) * s01au / 0xff
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11i := (sy1-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4
- s11au := uint32(src.Pix[s11i+3]) * 0x101
- s11ru := uint32(src.Pix[s11i+0]) * s11au / 0xff
- s11gu := uint32(src.Pix[s11i+1]) * s11au / 0xff
- s11bu := uint32(src.Pix[s11i+2]) * s11au / 0xff
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = uint8(pa >> 8)
- }
- }
-}
-
-func (ablInterpolator) transform_RGBA_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00i := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
- s00ru := uint32(src.Pix[s00i+0]) * 0x101
- s00gu := uint32(src.Pix[s00i+1]) * 0x101
- s00bu := uint32(src.Pix[s00i+2]) * 0x101
- s00au := uint32(src.Pix[s00i+3]) * 0x101
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10i := (sy0-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4
- s10ru := uint32(src.Pix[s10i+0]) * 0x101
- s10gu := uint32(src.Pix[s10i+1]) * 0x101
- s10bu := uint32(src.Pix[s10i+2]) * 0x101
- s10au := uint32(src.Pix[s10i+3]) * 0x101
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01i := (sy1-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
- s01ru := uint32(src.Pix[s01i+0]) * 0x101
- s01gu := uint32(src.Pix[s01i+1]) * 0x101
- s01bu := uint32(src.Pix[s01i+2]) * 0x101
- s01au := uint32(src.Pix[s01i+3]) * 0x101
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11i := (sy1-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4
- s11ru := uint32(src.Pix[s11i+0]) * 0x101
- s11gu := uint32(src.Pix[s11i+1]) * 0x101
- s11bu := uint32(src.Pix[s11i+2]) * 0x101
- s11au := uint32(src.Pix[s11i+3]) * 0x101
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- pa1 := (0xffff - pa) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-}
-
-func (ablInterpolator) transform_RGBA_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00i := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
- s00ru := uint32(src.Pix[s00i+0]) * 0x101
- s00gu := uint32(src.Pix[s00i+1]) * 0x101
- s00bu := uint32(src.Pix[s00i+2]) * 0x101
- s00au := uint32(src.Pix[s00i+3]) * 0x101
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10i := (sy0-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4
- s10ru := uint32(src.Pix[s10i+0]) * 0x101
- s10gu := uint32(src.Pix[s10i+1]) * 0x101
- s10bu := uint32(src.Pix[s10i+2]) * 0x101
- s10au := uint32(src.Pix[s10i+3]) * 0x101
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01i := (sy1-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
- s01ru := uint32(src.Pix[s01i+0]) * 0x101
- s01gu := uint32(src.Pix[s01i+1]) * 0x101
- s01bu := uint32(src.Pix[s01i+2]) * 0x101
- s01au := uint32(src.Pix[s01i+3]) * 0x101
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11i := (sy1-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4
- s11ru := uint32(src.Pix[s11i+0]) * 0x101
- s11gu := uint32(src.Pix[s11i+1]) * 0x101
- s11bu := uint32(src.Pix[s11i+2]) * 0x101
- s11au := uint32(src.Pix[s11i+3]) * 0x101
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = uint8(pa >> 8)
- }
- }
-}
-
-func (ablInterpolator) transform_RGBA_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00i := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- s00j := (sy0-src.Rect.Min.Y)*src.CStride + (sx0 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i]) * 0x10101
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sy0-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s10j := (sy0-src.Rect.Min.Y)*src.CStride + (sx1 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i]) * 0x10101
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sy1-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- s01j := (sy1-src.Rect.Min.Y)*src.CStride + (sx0 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i]) * 0x10101
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sy1-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s11j := (sy1-src.Rect.Min.Y)*src.CStride + (sx1 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i]) * 0x10101
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (ablInterpolator) transform_RGBA_YCbCr422_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00i := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- s00j := (sy0-src.Rect.Min.Y)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i]) * 0x10101
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sy0-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s10j := (sy0-src.Rect.Min.Y)*src.CStride + ((sx1)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i]) * 0x10101
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sy1-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- s01j := (sy1-src.Rect.Min.Y)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i]) * 0x10101
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sy1-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s11j := (sy1-src.Rect.Min.Y)*src.CStride + ((sx1)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i]) * 0x10101
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (ablInterpolator) transform_RGBA_YCbCr420_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00i := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- s00j := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i]) * 0x10101
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sy0-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s10j := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + ((sx1)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i]) * 0x10101
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sy1-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- s01j := ((sy1)/2-src.Rect.Min.Y/2)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i]) * 0x10101
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sy1-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s11j := ((sy1)/2-src.Rect.Min.Y/2)*src.CStride + ((sx1)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i]) * 0x10101
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (ablInterpolator) transform_RGBA_YCbCr440_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00i := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- s00j := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + (sx0 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i]) * 0x10101
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sy0-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s10j := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + (sx1 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i]) * 0x10101
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sy1-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- s01j := ((sy1)/2-src.Rect.Min.Y/2)*src.CStride + (sx0 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i]) * 0x10101
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sy1-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s11j := ((sy1)/2-src.Rect.Min.Y/2)*src.CStride + (sx1 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i]) * 0x10101
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (ablInterpolator) transform_RGBA_Image_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00ru, s00gu, s00bu, s00au := src.At(sx0, sy0).RGBA()
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10ru, s10gu, s10bu, s10au := src.At(sx1, sy0).RGBA()
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01ru, s01gu, s01bu, s01au := src.At(sx0, sy1).RGBA()
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11ru, s11gu, s11bu, s11au := src.At(sx1, sy1).RGBA()
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- pa1 := (0xffff - pa) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-}
-
-func (ablInterpolator) transform_RGBA_Image_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) {
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00ru, s00gu, s00bu, s00au := src.At(sx0, sy0).RGBA()
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10ru, s10gu, s10bu, s10au := src.At(sx1, sy0).RGBA()
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01ru, s01gu, s01bu, s01au := src.At(sx0, sy1).RGBA()
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11ru, s11gu, s11bu, s11au := src.At(sx1, sy1).RGBA()
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- dst.Pix[d+0] = uint8(pr >> 8)
- dst.Pix[d+1] = uint8(pg >> 8)
- dst.Pix[d+2] = uint8(pb >> 8)
- dst.Pix[d+3] = uint8(pa >> 8)
- }
- }
-}
-
-func (ablInterpolator) transform_Image_Image_Over(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) {
- srcMask, smp := opts.SrcMask, opts.SrcMaskP
- dstMask, dmp := opts.DstMask, opts.DstMaskP
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00ru, s00gu, s00bu, s00au := src.At(sx0, sy0).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sx0, smp.Y+sy0).RGBA()
- s00ru = s00ru * ma / 0xffff
- s00gu = s00gu * ma / 0xffff
- s00bu = s00bu * ma / 0xffff
- s00au = s00au * ma / 0xffff
- }
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10ru, s10gu, s10bu, s10au := src.At(sx1, sy0).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sx1, smp.Y+sy0).RGBA()
- s10ru = s10ru * ma / 0xffff
- s10gu = s10gu * ma / 0xffff
- s10bu = s10bu * ma / 0xffff
- s10au = s10au * ma / 0xffff
- }
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01ru, s01gu, s01bu, s01au := src.At(sx0, sy1).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sx0, smp.Y+sy1).RGBA()
- s01ru = s01ru * ma / 0xffff
- s01gu = s01gu * ma / 0xffff
- s01bu = s01bu * ma / 0xffff
- s01au = s01au * ma / 0xffff
- }
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11ru, s11gu, s11bu, s11au := src.At(sx1, sy1).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sx1, smp.Y+sy1).RGBA()
- s11ru = s11ru * ma / 0xffff
- s11gu = s11gu * ma / 0xffff
- s11bu = s11bu * ma / 0xffff
- s11au = s11au * ma / 0xffff
- }
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
- if dstMask != nil {
- _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA()
- pr = pr * ma / 0xffff
- pg = pg * ma / 0xffff
- pb = pb * ma / 0xffff
- pa = pa * ma / 0xffff
- }
- pa1 := 0xffff - pa
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- }
- }
-}
-
-func (ablInterpolator) transform_Image_Image_Src(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) {
- srcMask, smp := opts.SrcMask, opts.SrcMaskP
- dstMask, dmp := opts.DstMask, opts.DstMaskP
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- sx -= 0.5
- sx0 := int(sx)
- xFrac0 := sx - float64(sx0)
- xFrac1 := 1 - xFrac0
- sx0 += bias.X
- sx1 := sx0 + 1
- if sx0 < sr.Min.X {
- sx0, sx1 = sr.Min.X, sr.Min.X
- xFrac0, xFrac1 = 0, 1
- } else if sx1 >= sr.Max.X {
- sx0, sx1 = sr.Max.X-1, sr.Max.X-1
- xFrac0, xFrac1 = 1, 0
- }
-
- sy -= 0.5
- sy0 := int(sy)
- yFrac0 := sy - float64(sy0)
- yFrac1 := 1 - yFrac0
- sy0 += bias.Y
- sy1 := sy0 + 1
- if sy0 < sr.Min.Y {
- sy0, sy1 = sr.Min.Y, sr.Min.Y
- yFrac0, yFrac1 = 0, 1
- } else if sy1 >= sr.Max.Y {
- sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1
- yFrac0, yFrac1 = 1, 0
- }
-
- s00ru, s00gu, s00bu, s00au := src.At(sx0, sy0).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sx0, smp.Y+sy0).RGBA()
- s00ru = s00ru * ma / 0xffff
- s00gu = s00gu * ma / 0xffff
- s00bu = s00bu * ma / 0xffff
- s00au = s00au * ma / 0xffff
- }
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s00a := float64(s00au)
- s10ru, s10gu, s10bu, s10au := src.At(sx1, sy0).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sx1, smp.Y+sy0).RGBA()
- s10ru = s10ru * ma / 0xffff
- s10gu = s10gu * ma / 0xffff
- s10bu = s10bu * ma / 0xffff
- s10au = s10au * ma / 0xffff
- }
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10a := float64(s10au)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s10a = xFrac1*s00a + xFrac0*s10a
- s01ru, s01gu, s01bu, s01au := src.At(sx0, sy1).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sx0, smp.Y+sy1).RGBA()
- s01ru = s01ru * ma / 0xffff
- s01gu = s01gu * ma / 0xffff
- s01bu = s01bu * ma / 0xffff
- s01au = s01au * ma / 0xffff
- }
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s01a := float64(s01au)
- s11ru, s11gu, s11bu, s11au := src.At(sx1, sy1).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sx1, smp.Y+sy1).RGBA()
- s11ru = s11ru * ma / 0xffff
- s11gu = s11gu * ma / 0xffff
- s11bu = s11bu * ma / 0xffff
- s11au = s11au * ma / 0xffff
- }
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11a := float64(s11au)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11a = xFrac1*s01a + xFrac0*s11a
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- s11a = yFrac1*s10a + yFrac0*s11a
- pr := uint32(s11r)
- pg := uint32(s11g)
- pb := uint32(s11b)
- pa := uint32(s11a)
- if dstMask != nil {
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
- _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA()
- pr = pr * ma / 0xffff
- pg = pg * ma / 0xffff
- pb = pb * ma / 0xffff
- pa = pa * ma / 0xffff
- pa1 := 0xffff - ma
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- } else {
- dstColorRGBA64.R = uint16(pr)
- dstColorRGBA64.G = uint16(pg)
- dstColorRGBA64.B = uint16(pb)
- dstColorRGBA64.A = uint16(pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- }
- }
- }
-}
-
-func (z *kernelScaler) Scale(dst Image, dr image.Rectangle, src image.Image, sr image.Rectangle, op Op, opts *Options) {
- if z.dw != int32(dr.Dx()) || z.dh != int32(dr.Dy()) || z.sw != int32(sr.Dx()) || z.sh != int32(sr.Dy()) {
- z.kernel.Scale(dst, dr, src, sr, op, opts)
- return
- }
-
- var o Options
- if opts != nil {
- o = *opts
- }
-
- // adr is the affected destination pixels.
- adr := dst.Bounds().Intersect(dr)
- adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP)
- if adr.Empty() || sr.Empty() {
- return
- }
- // Make adr relative to dr.Min.
- adr = adr.Sub(dr.Min)
- if op == Over && o.SrcMask == nil && opaque(src) {
- op = Src
- }
-
- if _, ok := src.(*image.Uniform); ok && o.DstMask == nil && o.SrcMask == nil && sr.In(src.Bounds()) {
- Draw(dst, dr, src, src.Bounds().Min, op)
- return
- }
-
- // Create a temporary buffer:
- // scaleX distributes the source image's columns over the temporary image.
- // scaleY distributes the temporary image's rows over the destination image.
- var tmp [][4]float64
- if z.pool.New != nil {
- tmpp := z.pool.Get().(*[][4]float64)
- defer z.pool.Put(tmpp)
- tmp = *tmpp
- } else {
- tmp = z.makeTmpBuf()
- }
-
- // sr is the source pixels. If it extends beyond the src bounds,
- // we cannot use the type-specific fast paths, as they access
- // the Pix fields directly without bounds checking.
- //
- // Similarly, the fast paths assume that the masks are nil.
- if o.SrcMask != nil || !sr.In(src.Bounds()) {
- z.scaleX_Image(tmp, src, sr, &o)
- } else {
- switch src := src.(type) {
- case *image.Gray:
- z.scaleX_Gray(tmp, src, sr, &o)
- case *image.NRGBA:
- z.scaleX_NRGBA(tmp, src, sr, &o)
- case *image.RGBA:
- z.scaleX_RGBA(tmp, src, sr, &o)
- case *image.YCbCr:
- switch src.SubsampleRatio {
- default:
- z.scaleX_Image(tmp, src, sr, &o)
- case image.YCbCrSubsampleRatio444:
- z.scaleX_YCbCr444(tmp, src, sr, &o)
- case image.YCbCrSubsampleRatio422:
- z.scaleX_YCbCr422(tmp, src, sr, &o)
- case image.YCbCrSubsampleRatio420:
- z.scaleX_YCbCr420(tmp, src, sr, &o)
- case image.YCbCrSubsampleRatio440:
- z.scaleX_YCbCr440(tmp, src, sr, &o)
- }
- default:
- z.scaleX_Image(tmp, src, sr, &o)
- }
- }
-
- if o.DstMask != nil {
- switch op {
- case Over:
- z.scaleY_Image_Over(dst, dr, adr, tmp, &o)
- case Src:
- z.scaleY_Image_Src(dst, dr, adr, tmp, &o)
- }
- } else {
- switch op {
- case Over:
- switch dst := dst.(type) {
- case *image.RGBA:
- z.scaleY_RGBA_Over(dst, dr, adr, tmp, &o)
- default:
- z.scaleY_Image_Over(dst, dr, adr, tmp, &o)
- }
- case Src:
- switch dst := dst.(type) {
- case *image.RGBA:
- z.scaleY_RGBA_Src(dst, dr, adr, tmp, &o)
- default:
- z.scaleY_Image_Src(dst, dr, adr, tmp, &o)
- }
- }
- }
-}
-
-func (q *Kernel) Transform(dst Image, s2d f64.Aff3, src image.Image, sr image.Rectangle, op Op, opts *Options) {
- var o Options
- if opts != nil {
- o = *opts
- }
-
- dr := transformRect(&s2d, &sr)
- // adr is the affected destination pixels.
- adr := dst.Bounds().Intersect(dr)
- adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP)
- if adr.Empty() || sr.Empty() {
- return
- }
- if op == Over && o.SrcMask == nil && opaque(src) {
- op = Src
- }
- d2s := invert(&s2d)
- // bias is a translation of the mapping from dst coordinates to src
- // coordinates such that the latter temporarily have non-negative X
- // and Y coordinates. This allows us to write int(f) instead of
- // int(math.Floor(f)), since "round to zero" and "round down" are
- // equivalent when f >= 0, but the former is much cheaper. The X--
- // and Y-- are because the TransformLeaf methods have a "sx -= 0.5"
- // adjustment.
- bias := transformRect(&d2s, &adr).Min
- bias.X--
- bias.Y--
- d2s[2] -= float64(bias.X)
- d2s[5] -= float64(bias.Y)
- // Make adr relative to dr.Min.
- adr = adr.Sub(dr.Min)
-
- if u, ok := src.(*image.Uniform); ok && o.DstMask != nil && o.SrcMask != nil && sr.In(src.Bounds()) {
- transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op)
- return
- }
-
- xscale := abs(d2s[0])
- if s := abs(d2s[1]); xscale < s {
- xscale = s
- }
- yscale := abs(d2s[3])
- if s := abs(d2s[4]); yscale < s {
- yscale = s
- }
-
- // sr is the source pixels. If it extends beyond the src bounds,
- // we cannot use the type-specific fast paths, as they access
- // the Pix fields directly without bounds checking.
- //
- // Similarly, the fast paths assume that the masks are nil.
- if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) {
- switch op {
- case Over:
- q.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- case Src:
- q.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- }
- } else {
- switch op {
- case Over:
- switch dst := dst.(type) {
- case *image.RGBA:
- switch src := src.(type) {
- case *image.NRGBA:
- q.transform_RGBA_NRGBA_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- case *image.RGBA:
- q.transform_RGBA_RGBA_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- default:
- q.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- }
- default:
- switch src := src.(type) {
- default:
- q.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- }
- }
- case Src:
- switch dst := dst.(type) {
- case *image.RGBA:
- switch src := src.(type) {
- case *image.Gray:
- q.transform_RGBA_Gray_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- case *image.NRGBA:
- q.transform_RGBA_NRGBA_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- case *image.RGBA:
- q.transform_RGBA_RGBA_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- case *image.YCbCr:
- switch src.SubsampleRatio {
- default:
- q.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- case image.YCbCrSubsampleRatio444:
- q.transform_RGBA_YCbCr444_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- case image.YCbCrSubsampleRatio422:
- q.transform_RGBA_YCbCr422_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- case image.YCbCrSubsampleRatio420:
- q.transform_RGBA_YCbCr420_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- case image.YCbCrSubsampleRatio440:
- q.transform_RGBA_YCbCr440_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- }
- default:
- q.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- }
- default:
- switch src := src.(type) {
- default:
- q.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o)
- }
- }
- }
- }
-}
-
-func (z *kernelScaler) scaleX_Gray(tmp [][4]float64, src *image.Gray, sr image.Rectangle, opts *Options) {
- t := 0
- for y := int32(0); y < z.sh; y++ {
- for _, s := range z.horizontal.sources {
- var pr float64
- for _, c := range z.horizontal.contribs[s.i:s.j] {
- pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(c.coord) - src.Rect.Min.X)
- pru := uint32(src.Pix[pi]) * 0x101
- pr += float64(pru) * c.weight
- }
- pr *= s.invTotalWeightFFFF
- tmp[t] = [4]float64{
- pr,
- pr,
- pr,
- 1,
- }
- t++
- }
- }
-}
-
-func (z *kernelScaler) scaleX_NRGBA(tmp [][4]float64, src *image.NRGBA, sr image.Rectangle, opts *Options) {
- t := 0
- for y := int32(0); y < z.sh; y++ {
- for _, s := range z.horizontal.sources {
- var pr, pg, pb, pa float64
- for _, c := range z.horizontal.contribs[s.i:s.j] {
- pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(c.coord)-src.Rect.Min.X)*4
- pau := uint32(src.Pix[pi+3]) * 0x101
- pru := uint32(src.Pix[pi+0]) * pau / 0xff
- pgu := uint32(src.Pix[pi+1]) * pau / 0xff
- pbu := uint32(src.Pix[pi+2]) * pau / 0xff
- pr += float64(pru) * c.weight
- pg += float64(pgu) * c.weight
- pb += float64(pbu) * c.weight
- pa += float64(pau) * c.weight
- }
- tmp[t] = [4]float64{
- pr * s.invTotalWeightFFFF,
- pg * s.invTotalWeightFFFF,
- pb * s.invTotalWeightFFFF,
- pa * s.invTotalWeightFFFF,
- }
- t++
- }
- }
-}
-
-func (z *kernelScaler) scaleX_RGBA(tmp [][4]float64, src *image.RGBA, sr image.Rectangle, opts *Options) {
- t := 0
- for y := int32(0); y < z.sh; y++ {
- for _, s := range z.horizontal.sources {
- var pr, pg, pb, pa float64
- for _, c := range z.horizontal.contribs[s.i:s.j] {
- pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(c.coord)-src.Rect.Min.X)*4
- pru := uint32(src.Pix[pi+0]) * 0x101
- pgu := uint32(src.Pix[pi+1]) * 0x101
- pbu := uint32(src.Pix[pi+2]) * 0x101
- pau := uint32(src.Pix[pi+3]) * 0x101
- pr += float64(pru) * c.weight
- pg += float64(pgu) * c.weight
- pb += float64(pbu) * c.weight
- pa += float64(pau) * c.weight
- }
- tmp[t] = [4]float64{
- pr * s.invTotalWeightFFFF,
- pg * s.invTotalWeightFFFF,
- pb * s.invTotalWeightFFFF,
- pa * s.invTotalWeightFFFF,
- }
- t++
- }
- }
-}
-
-func (z *kernelScaler) scaleX_YCbCr444(tmp [][4]float64, src *image.YCbCr, sr image.Rectangle, opts *Options) {
- t := 0
- for y := int32(0); y < z.sh; y++ {
- for _, s := range z.horizontal.sources {
- var pr, pg, pb float64
- for _, c := range z.horizontal.contribs[s.i:s.j] {
- pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(c.coord) - src.Rect.Min.X)
- pj := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(c.coord) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pru := (pyy1 + 91881*pcr1) >> 8
- pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pbu := (pyy1 + 116130*pcb1) >> 8
- if pru < 0 {
- pru = 0
- } else if pru > 0xffff {
- pru = 0xffff
- }
- if pgu < 0 {
- pgu = 0
- } else if pgu > 0xffff {
- pgu = 0xffff
- }
- if pbu < 0 {
- pbu = 0
- } else if pbu > 0xffff {
- pbu = 0xffff
- }
-
- pr += float64(pru) * c.weight
- pg += float64(pgu) * c.weight
- pb += float64(pbu) * c.weight
- }
- tmp[t] = [4]float64{
- pr * s.invTotalWeightFFFF,
- pg * s.invTotalWeightFFFF,
- pb * s.invTotalWeightFFFF,
- 1,
- }
- t++
- }
- }
-}
-
-func (z *kernelScaler) scaleX_YCbCr422(tmp [][4]float64, src *image.YCbCr, sr image.Rectangle, opts *Options) {
- t := 0
- for y := int32(0); y < z.sh; y++ {
- for _, s := range z.horizontal.sources {
- var pr, pg, pb float64
- for _, c := range z.horizontal.contribs[s.i:s.j] {
- pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(c.coord) - src.Rect.Min.X)
- pj := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(c.coord))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pru := (pyy1 + 91881*pcr1) >> 8
- pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pbu := (pyy1 + 116130*pcb1) >> 8
- if pru < 0 {
- pru = 0
- } else if pru > 0xffff {
- pru = 0xffff
- }
- if pgu < 0 {
- pgu = 0
- } else if pgu > 0xffff {
- pgu = 0xffff
- }
- if pbu < 0 {
- pbu = 0
- } else if pbu > 0xffff {
- pbu = 0xffff
- }
-
- pr += float64(pru) * c.weight
- pg += float64(pgu) * c.weight
- pb += float64(pbu) * c.weight
- }
- tmp[t] = [4]float64{
- pr * s.invTotalWeightFFFF,
- pg * s.invTotalWeightFFFF,
- pb * s.invTotalWeightFFFF,
- 1,
- }
- t++
- }
- }
-}
-
-func (z *kernelScaler) scaleX_YCbCr420(tmp [][4]float64, src *image.YCbCr, sr image.Rectangle, opts *Options) {
- t := 0
- for y := int32(0); y < z.sh; y++ {
- for _, s := range z.horizontal.sources {
- var pr, pg, pb float64
- for _, c := range z.horizontal.contribs[s.i:s.j] {
- pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(c.coord) - src.Rect.Min.X)
- pj := ((sr.Min.Y+int(y))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(c.coord))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pru := (pyy1 + 91881*pcr1) >> 8
- pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pbu := (pyy1 + 116130*pcb1) >> 8
- if pru < 0 {
- pru = 0
- } else if pru > 0xffff {
- pru = 0xffff
- }
- if pgu < 0 {
- pgu = 0
- } else if pgu > 0xffff {
- pgu = 0xffff
- }
- if pbu < 0 {
- pbu = 0
- } else if pbu > 0xffff {
- pbu = 0xffff
- }
-
- pr += float64(pru) * c.weight
- pg += float64(pgu) * c.weight
- pb += float64(pbu) * c.weight
- }
- tmp[t] = [4]float64{
- pr * s.invTotalWeightFFFF,
- pg * s.invTotalWeightFFFF,
- pb * s.invTotalWeightFFFF,
- 1,
- }
- t++
- }
- }
-}
-
-func (z *kernelScaler) scaleX_YCbCr440(tmp [][4]float64, src *image.YCbCr, sr image.Rectangle, opts *Options) {
- t := 0
- for y := int32(0); y < z.sh; y++ {
- for _, s := range z.horizontal.sources {
- var pr, pg, pb float64
- for _, c := range z.horizontal.contribs[s.i:s.j] {
- pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(c.coord) - src.Rect.Min.X)
- pj := ((sr.Min.Y+int(y))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(c.coord) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pru := (pyy1 + 91881*pcr1) >> 8
- pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pbu := (pyy1 + 116130*pcb1) >> 8
- if pru < 0 {
- pru = 0
- } else if pru > 0xffff {
- pru = 0xffff
- }
- if pgu < 0 {
- pgu = 0
- } else if pgu > 0xffff {
- pgu = 0xffff
- }
- if pbu < 0 {
- pbu = 0
- } else if pbu > 0xffff {
- pbu = 0xffff
- }
-
- pr += float64(pru) * c.weight
- pg += float64(pgu) * c.weight
- pb += float64(pbu) * c.weight
- }
- tmp[t] = [4]float64{
- pr * s.invTotalWeightFFFF,
- pg * s.invTotalWeightFFFF,
- pb * s.invTotalWeightFFFF,
- 1,
- }
- t++
- }
- }
-}
-
-func (z *kernelScaler) scaleX_Image(tmp [][4]float64, src image.Image, sr image.Rectangle, opts *Options) {
- t := 0
- srcMask, smp := opts.SrcMask, opts.SrcMaskP
- for y := int32(0); y < z.sh; y++ {
- for _, s := range z.horizontal.sources {
- var pr, pg, pb, pa float64
- for _, c := range z.horizontal.contribs[s.i:s.j] {
- pru, pgu, pbu, pau := src.At(sr.Min.X+int(c.coord), sr.Min.Y+int(y)).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(c.coord), smp.Y+sr.Min.Y+int(y)).RGBA()
- pru = pru * ma / 0xffff
- pgu = pgu * ma / 0xffff
- pbu = pbu * ma / 0xffff
- pau = pau * ma / 0xffff
- }
- pr += float64(pru) * c.weight
- pg += float64(pgu) * c.weight
- pb += float64(pbu) * c.weight
- pa += float64(pau) * c.weight
- }
- tmp[t] = [4]float64{
- pr * s.invTotalWeightFFFF,
- pg * s.invTotalWeightFFFF,
- pb * s.invTotalWeightFFFF,
- pa * s.invTotalWeightFFFF,
- }
- t++
- }
- }
-}
-
-func (z *kernelScaler) scaleY_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, tmp [][4]float64, opts *Options) {
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- d := (dr.Min.Y+adr.Min.Y-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+int(dx)-dst.Rect.Min.X)*4
- for _, s := range z.vertical.sources[adr.Min.Y:adr.Max.Y] {
- var pr, pg, pb, pa float64
- for _, c := range z.vertical.contribs[s.i:s.j] {
- p := &tmp[c.coord*z.dw+dx]
- pr += p[0] * c.weight
- pg += p[1] * c.weight
- pb += p[2] * c.weight
- pa += p[3] * c.weight
- }
-
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
-
- pr0 := uint32(ftou(pr * s.invTotalWeight))
- pg0 := uint32(ftou(pg * s.invTotalWeight))
- pb0 := uint32(ftou(pb * s.invTotalWeight))
- pa0 := uint32(ftou(pa * s.invTotalWeight))
- pa1 := (0xffff - uint32(pa0)) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr0) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg0) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb0) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa0) >> 8)
- d += dst.Stride
- }
- }
-}
-
-func (z *kernelScaler) scaleY_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, tmp [][4]float64, opts *Options) {
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- d := (dr.Min.Y+adr.Min.Y-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+int(dx)-dst.Rect.Min.X)*4
- for _, s := range z.vertical.sources[adr.Min.Y:adr.Max.Y] {
- var pr, pg, pb, pa float64
- for _, c := range z.vertical.contribs[s.i:s.j] {
- p := &tmp[c.coord*z.dw+dx]
- pr += p[0] * c.weight
- pg += p[1] * c.weight
- pb += p[2] * c.weight
- pa += p[3] * c.weight
- }
-
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
-
- dst.Pix[d+0] = uint8(ftou(pr*s.invTotalWeight) >> 8)
- dst.Pix[d+1] = uint8(ftou(pg*s.invTotalWeight) >> 8)
- dst.Pix[d+2] = uint8(ftou(pb*s.invTotalWeight) >> 8)
- dst.Pix[d+3] = uint8(ftou(pa*s.invTotalWeight) >> 8)
- d += dst.Stride
- }
- }
-}
-
-func (z *kernelScaler) scaleY_Image_Over(dst Image, dr, adr image.Rectangle, tmp [][4]float64, opts *Options) {
- dstMask, dmp := opts.DstMask, opts.DstMaskP
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- for dy, s := range z.vertical.sources[adr.Min.Y:adr.Max.Y] {
- var pr, pg, pb, pa float64
- for _, c := range z.vertical.contribs[s.i:s.j] {
- p := &tmp[c.coord*z.dw+dx]
- pr += p[0] * c.weight
- pg += p[1] * c.weight
- pb += p[2] * c.weight
- pa += p[3] * c.weight
- }
-
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
-
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(adr.Min.Y+dy)).RGBA()
- pr0 := uint32(ftou(pr * s.invTotalWeight))
- pg0 := uint32(ftou(pg * s.invTotalWeight))
- pb0 := uint32(ftou(pb * s.invTotalWeight))
- pa0 := uint32(ftou(pa * s.invTotalWeight))
- if dstMask != nil {
- _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(adr.Min.Y+dy)).RGBA()
- pr0 = pr0 * ma / 0xffff
- pg0 = pg0 * ma / 0xffff
- pb0 = pb0 * ma / 0xffff
- pa0 = pa0 * ma / 0xffff
- }
- pa1 := 0xffff - pa0
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr0)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg0)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb0)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa0)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(adr.Min.Y+dy), dstColor)
- }
- }
-}
-
-func (z *kernelScaler) scaleY_Image_Src(dst Image, dr, adr image.Rectangle, tmp [][4]float64, opts *Options) {
- dstMask, dmp := opts.DstMask, opts.DstMaskP
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- for dy, s := range z.vertical.sources[adr.Min.Y:adr.Max.Y] {
- var pr, pg, pb, pa float64
- for _, c := range z.vertical.contribs[s.i:s.j] {
- p := &tmp[c.coord*z.dw+dx]
- pr += p[0] * c.weight
- pg += p[1] * c.weight
- pb += p[2] * c.weight
- pa += p[3] * c.weight
- }
-
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
-
- if dstMask != nil {
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(adr.Min.Y+dy)).RGBA()
- _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(adr.Min.Y+dy)).RGBA()
- pr := uint32(ftou(pr*s.invTotalWeight)) * ma / 0xffff
- pg := uint32(ftou(pg*s.invTotalWeight)) * ma / 0xffff
- pb := uint32(ftou(pb*s.invTotalWeight)) * ma / 0xffff
- pa := uint32(ftou(pa*s.invTotalWeight)) * ma / 0xffff
- pa1 := 0xffff - ma
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(adr.Min.Y+dy), dstColor)
- } else {
- dstColorRGBA64.R = ftou(pr * s.invTotalWeight)
- dstColorRGBA64.G = ftou(pg * s.invTotalWeight)
- dstColorRGBA64.B = ftou(pb * s.invTotalWeight)
- dstColorRGBA64.A = ftou(pa * s.invTotalWeight)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(adr.Min.Y+dy), dstColor)
- }
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.Gray, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pi := (ky-src.Rect.Min.Y)*src.Stride + (kx - src.Rect.Min.X)
- pru := uint32(src.Pix[pi]) * 0x101
- pr += float64(pru) * w
- }
- }
- }
- }
- out := uint8(fffftou(pr) >> 8)
- dst.Pix[d+0] = out
- dst.Pix[d+1] = out
- dst.Pix[d+2] = out
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_NRGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb, pa float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pi := (ky-src.Rect.Min.Y)*src.Stride + (kx-src.Rect.Min.X)*4
- pau := uint32(src.Pix[pi+3]) * 0x101
- pru := uint32(src.Pix[pi+0]) * pau / 0xff
- pgu := uint32(src.Pix[pi+1]) * pau / 0xff
- pbu := uint32(src.Pix[pi+2]) * pau / 0xff
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- pa += float64(pau) * w
- }
- }
- }
- }
-
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
-
- pr0 := uint32(fffftou(pr))
- pg0 := uint32(fffftou(pg))
- pb0 := uint32(fffftou(pb))
- pa0 := uint32(fffftou(pa))
- pa1 := (0xffff - uint32(pa0)) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr0) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg0) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb0) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa0) >> 8)
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_NRGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb, pa float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pi := (ky-src.Rect.Min.Y)*src.Stride + (kx-src.Rect.Min.X)*4
- pau := uint32(src.Pix[pi+3]) * 0x101
- pru := uint32(src.Pix[pi+0]) * pau / 0xff
- pgu := uint32(src.Pix[pi+1]) * pau / 0xff
- pbu := uint32(src.Pix[pi+2]) * pau / 0xff
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- pa += float64(pau) * w
- }
- }
- }
- }
-
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
-
- dst.Pix[d+0] = uint8(fffftou(pr) >> 8)
- dst.Pix[d+1] = uint8(fffftou(pg) >> 8)
- dst.Pix[d+2] = uint8(fffftou(pb) >> 8)
- dst.Pix[d+3] = uint8(fffftou(pa) >> 8)
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb, pa float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pi := (ky-src.Rect.Min.Y)*src.Stride + (kx-src.Rect.Min.X)*4
- pru := uint32(src.Pix[pi+0]) * 0x101
- pgu := uint32(src.Pix[pi+1]) * 0x101
- pbu := uint32(src.Pix[pi+2]) * 0x101
- pau := uint32(src.Pix[pi+3]) * 0x101
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- pa += float64(pau) * w
- }
- }
- }
- }
-
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
-
- pr0 := uint32(fffftou(pr))
- pg0 := uint32(fffftou(pg))
- pb0 := uint32(fffftou(pb))
- pa0 := uint32(fffftou(pa))
- pa1 := (0xffff - uint32(pa0)) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr0) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg0) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb0) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa0) >> 8)
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb, pa float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pi := (ky-src.Rect.Min.Y)*src.Stride + (kx-src.Rect.Min.X)*4
- pru := uint32(src.Pix[pi+0]) * 0x101
- pgu := uint32(src.Pix[pi+1]) * 0x101
- pbu := uint32(src.Pix[pi+2]) * 0x101
- pau := uint32(src.Pix[pi+3]) * 0x101
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- pa += float64(pau) * w
- }
- }
- }
- }
-
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
-
- dst.Pix[d+0] = uint8(fffftou(pr) >> 8)
- dst.Pix[d+1] = uint8(fffftou(pg) >> 8)
- dst.Pix[d+2] = uint8(fffftou(pb) >> 8)
- dst.Pix[d+3] = uint8(fffftou(pa) >> 8)
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pi := (ky-src.Rect.Min.Y)*src.YStride + (kx - src.Rect.Min.X)
- pj := (ky-src.Rect.Min.Y)*src.CStride + (kx - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pru := (pyy1 + 91881*pcr1) >> 8
- pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pbu := (pyy1 + 116130*pcb1) >> 8
- if pru < 0 {
- pru = 0
- } else if pru > 0xffff {
- pru = 0xffff
- }
- if pgu < 0 {
- pgu = 0
- } else if pgu > 0xffff {
- pgu = 0xffff
- }
- if pbu < 0 {
- pbu = 0
- } else if pbu > 0xffff {
- pbu = 0xffff
- }
-
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- }
- }
- }
- }
- dst.Pix[d+0] = uint8(fffftou(pr) >> 8)
- dst.Pix[d+1] = uint8(fffftou(pg) >> 8)
- dst.Pix[d+2] = uint8(fffftou(pb) >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_YCbCr422_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pi := (ky-src.Rect.Min.Y)*src.YStride + (kx - src.Rect.Min.X)
- pj := (ky-src.Rect.Min.Y)*src.CStride + ((kx)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pru := (pyy1 + 91881*pcr1) >> 8
- pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pbu := (pyy1 + 116130*pcb1) >> 8
- if pru < 0 {
- pru = 0
- } else if pru > 0xffff {
- pru = 0xffff
- }
- if pgu < 0 {
- pgu = 0
- } else if pgu > 0xffff {
- pgu = 0xffff
- }
- if pbu < 0 {
- pbu = 0
- } else if pbu > 0xffff {
- pbu = 0xffff
- }
-
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- }
- }
- }
- }
- dst.Pix[d+0] = uint8(fffftou(pr) >> 8)
- dst.Pix[d+1] = uint8(fffftou(pg) >> 8)
- dst.Pix[d+2] = uint8(fffftou(pb) >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_YCbCr420_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pi := (ky-src.Rect.Min.Y)*src.YStride + (kx - src.Rect.Min.X)
- pj := ((ky)/2-src.Rect.Min.Y/2)*src.CStride + ((kx)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pru := (pyy1 + 91881*pcr1) >> 8
- pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pbu := (pyy1 + 116130*pcb1) >> 8
- if pru < 0 {
- pru = 0
- } else if pru > 0xffff {
- pru = 0xffff
- }
- if pgu < 0 {
- pgu = 0
- } else if pgu > 0xffff {
- pgu = 0xffff
- }
- if pbu < 0 {
- pbu = 0
- } else if pbu > 0xffff {
- pbu = 0xffff
- }
-
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- }
- }
- }
- }
- dst.Pix[d+0] = uint8(fffftou(pr) >> 8)
- dst.Pix[d+1] = uint8(fffftou(pg) >> 8)
- dst.Pix[d+2] = uint8(fffftou(pb) >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_YCbCr440_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pi := (ky-src.Rect.Min.Y)*src.YStride + (kx - src.Rect.Min.X)
- pj := ((ky)/2-src.Rect.Min.Y/2)*src.CStride + (kx - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- pyy1 := int(src.Y[pi]) * 0x10101
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pru := (pyy1 + 91881*pcr1) >> 8
- pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pbu := (pyy1 + 116130*pcb1) >> 8
- if pru < 0 {
- pru = 0
- } else if pru > 0xffff {
- pru = 0xffff
- }
- if pgu < 0 {
- pgu = 0
- } else if pgu > 0xffff {
- pgu = 0xffff
- }
- if pbu < 0 {
- pbu = 0
- } else if pbu > 0xffff {
- pbu = 0xffff
- }
-
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- }
- }
- }
- }
- dst.Pix[d+0] = uint8(fffftou(pr) >> 8)
- dst.Pix[d+1] = uint8(fffftou(pg) >> 8)
- dst.Pix[d+2] = uint8(fffftou(pb) >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_Image_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb, pa float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pru, pgu, pbu, pau := src.At(kx, ky).RGBA()
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- pa += float64(pau) * w
- }
- }
- }
- }
-
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
-
- pr0 := uint32(fffftou(pr))
- pg0 := uint32(fffftou(pg))
- pb0 := uint32(fffftou(pb))
- pa0 := uint32(fffftou(pa))
- pa1 := (0xffff - uint32(pa0)) * 0x101
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr0) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg0) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb0) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa0) >> 8)
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_Image_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb, pa float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pru, pgu, pbu, pau := src.At(kx, ky).RGBA()
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- pa += float64(pau) * w
- }
- }
- }
- }
-
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
-
- dst.Pix[d+0] = uint8(fffftou(pr) >> 8)
- dst.Pix[d+1] = uint8(fffftou(pg) >> 8)
- dst.Pix[d+2] = uint8(fffftou(pb) >> 8)
- dst.Pix[d+3] = uint8(fffftou(pa) >> 8)
- }
- }
-}
-
-func (q *Kernel) transform_Image_Image_Over(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- srcMask, smp := opts.SrcMask, opts.SrcMaskP
- dstMask, dmp := opts.DstMask, opts.DstMaskP
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb, pa float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pru, pgu, pbu, pau := src.At(kx, ky).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+kx, smp.Y+ky).RGBA()
- pru = pru * ma / 0xffff
- pgu = pgu * ma / 0xffff
- pbu = pbu * ma / 0xffff
- pau = pau * ma / 0xffff
- }
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- pa += float64(pau) * w
- }
- }
- }
- }
-
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
-
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
- pr0 := uint32(fffftou(pr))
- pg0 := uint32(fffftou(pg))
- pb0 := uint32(fffftou(pb))
- pa0 := uint32(fffftou(pa))
- if dstMask != nil {
- _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA()
- pr0 = pr0 * ma / 0xffff
- pg0 = pg0 * ma / 0xffff
- pb0 = pb0 * ma / 0xffff
- pa0 = pa0 * ma / 0xffff
- }
- pa1 := 0xffff - pa0
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr0)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg0)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb0)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa0)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- }
- }
-}
-
-func (q *Kernel) transform_Image_Image_Src(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) {
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- xHalfWidth, xKernelArgScale := q.Support, 1.0
- if xscale > 1 {
- xHalfWidth *= xscale
- xKernelArgScale = 1 / xscale
- }
- yHalfWidth, yKernelArgScale := q.Support, 1.0
- if yscale > 1 {
- yHalfWidth *= yscale
- yKernelArgScale = 1 / yscale
- }
-
- xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth)))
- yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth)))
-
- srcMask, smp := opts.SrcMask, opts.SrcMaskP
- dstMask, dmp := opts.DstMask, opts.DstMaskP
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2]
- sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5]
- if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) {
- continue
- }
-
- // TODO: adjust the bias so that we can use int(f) instead
- // of math.Floor(f) and math.Ceil(f).
- sx += float64(bias.X)
- sx -= 0.5
- ix := int(math.Floor(sx - xHalfWidth))
- if ix < sr.Min.X {
- ix = sr.Min.X
- }
- jx := int(math.Ceil(sx + xHalfWidth))
- if jx > sr.Max.X {
- jx = sr.Max.X
- }
-
- totalXWeight := 0.0
- for kx := ix; kx < jx; kx++ {
- xWeight := 0.0
- if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support {
- xWeight = q.At(t)
- }
- xWeights[kx-ix] = xWeight
- totalXWeight += xWeight
- }
- for x := range xWeights[:jx-ix] {
- xWeights[x] /= totalXWeight
- }
-
- sy += float64(bias.Y)
- sy -= 0.5
- iy := int(math.Floor(sy - yHalfWidth))
- if iy < sr.Min.Y {
- iy = sr.Min.Y
- }
- jy := int(math.Ceil(sy + yHalfWidth))
- if jy > sr.Max.Y {
- jy = sr.Max.Y
- }
-
- totalYWeight := 0.0
- for ky := iy; ky < jy; ky++ {
- yWeight := 0.0
- if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support {
- yWeight = q.At(t)
- }
- yWeights[ky-iy] = yWeight
- totalYWeight += yWeight
- }
- for y := range yWeights[:jy-iy] {
- yWeights[y] /= totalYWeight
- }
-
- var pr, pg, pb, pa float64
- for ky := iy; ky < jy; ky++ {
- if yWeight := yWeights[ky-iy]; yWeight != 0 {
- for kx := ix; kx < jx; kx++ {
- if w := xWeights[kx-ix] * yWeight; w != 0 {
- pru, pgu, pbu, pau := src.At(kx, ky).RGBA()
- if srcMask != nil {
- _, _, _, ma := srcMask.At(smp.X+kx, smp.Y+ky).RGBA()
- pru = pru * ma / 0xffff
- pgu = pgu * ma / 0xffff
- pbu = pbu * ma / 0xffff
- pau = pau * ma / 0xffff
- }
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- pa += float64(pau) * w
- }
- }
- }
- }
-
- if pr > pa {
- pr = pa
- }
- if pg > pa {
- pg = pa
- }
- if pb > pa {
- pb = pa
- }
-
- if dstMask != nil {
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
- _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA()
- pr := uint32(fffftou(pr)) * ma / 0xffff
- pg := uint32(fffftou(pg)) * ma / 0xffff
- pb := uint32(fffftou(pb)) * ma / 0xffff
- pa := uint32(fffftou(pa)) * ma / 0xffff
- pa1 := 0xffff - ma
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- } else {
- dstColorRGBA64.R = fffftou(pr)
- dstColorRGBA64.G = fffftou(pg)
- dstColorRGBA64.B = fffftou(pb)
- dstColorRGBA64.A = fffftou(pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- }
- }
- }
-}
diff --git a/vendor/golang.org/x/image/draw/scale.go b/vendor/golang.org/x/image/draw/scale.go
deleted file mode 100644
index 98ab404..0000000
--- a/vendor/golang.org/x/image/draw/scale.go
+++ /dev/null
@@ -1,527 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:generate go run gen.go
-
-package draw
-
-import (
- "image"
- "image/color"
- "math"
- "sync"
-
- "golang.org/x/image/math/f64"
-)
-
-// Copy copies the part of the source image defined by src and sr and writes
-// the result of a Porter-Duff composition to the part of the destination image
-// defined by dst and the translation of sr so that sr.Min translates to dp.
-func Copy(dst Image, dp image.Point, src image.Image, sr image.Rectangle, op Op, opts *Options) {
- var o Options
- if opts != nil {
- o = *opts
- }
- dr := sr.Add(dp.Sub(sr.Min))
- if o.DstMask == nil {
- DrawMask(dst, dr, src, sr.Min, o.SrcMask, o.SrcMaskP.Add(sr.Min), op)
- } else {
- NearestNeighbor.Scale(dst, dr, src, sr, op, opts)
- }
-}
-
-// Scaler scales the part of the source image defined by src and sr and writes
-// the result of a Porter-Duff composition to the part of the destination image
-// defined by dst and dr.
-//
-// A Scaler is safe to use concurrently.
-type Scaler interface {
- Scale(dst Image, dr image.Rectangle, src image.Image, sr image.Rectangle, op Op, opts *Options)
-}
-
-// Transformer transforms the part of the source image defined by src and sr
-// and writes the result of a Porter-Duff composition to the part of the
-// destination image defined by dst and the affine transform m applied to sr.
-//
-// For example, if m is the matrix
-//
-// m00 m01 m02
-// m10 m11 m12
-//
-// then the src-space point (sx, sy) maps to the dst-space point
-// (m00*sx + m01*sy + m02, m10*sx + m11*sy + m12).
-//
-// A Transformer is safe to use concurrently.
-type Transformer interface {
- Transform(dst Image, m f64.Aff3, src image.Image, sr image.Rectangle, op Op, opts *Options)
-}
-
-// Options are optional parameters to Copy, Scale and Transform.
-//
-// A nil *Options means to use the default (zero) values of each field.
-type Options struct {
- // Masks limit what parts of the dst image are drawn to and what parts of
- // the src image are drawn from.
- //
- // A dst or src mask image having a zero alpha (transparent) pixel value in
- // the respective coordinate space means that that dst pixel is entirely
- // unaffected or that src pixel is considered transparent black. A full
- // alpha (opaque) value means that the dst pixel is maximally affected or
- // the src pixel contributes maximally. The default values, nil, are
- // equivalent to fully opaque, infinitely large mask images.
- //
- // The DstMask is otherwise known as a clip mask, and its pixels map 1:1 to
- // the dst image's pixels. DstMaskP in DstMask space corresponds to
- // image.Point{X:0, Y:0} in dst space. For example, when limiting
- // repainting to a 'dirty rectangle', use that image.Rectangle and a zero
- // image.Point as the DstMask and DstMaskP.
- //
- // The SrcMask's pixels map 1:1 to the src image's pixels. SrcMaskP in
- // SrcMask space corresponds to image.Point{X:0, Y:0} in src space. For
- // example, when drawing font glyphs in a uniform color, use an
- // *image.Uniform as the src, and use the glyph atlas image and the
- // per-glyph offset as SrcMask and SrcMaskP:
- // Copy(dst, dp, image.NewUniform(color), image.Rect(0, 0, glyphWidth, glyphHeight), &Options{
- // SrcMask: glyphAtlas,
- // SrcMaskP: glyphOffset,
- // })
- DstMask image.Image
- DstMaskP image.Point
- SrcMask image.Image
- SrcMaskP image.Point
-
- // TODO: a smooth vs sharp edges option, for arbitrary rotations?
-}
-
-// Interpolator is an interpolation algorithm, when dst and src pixels don't
-// have a 1:1 correspondence.
-//
-// Of the interpolators provided by this package:
-// - NearestNeighbor is fast but usually looks worst.
-// - CatmullRom is slow but usually looks best.
-// - ApproxBiLinear has reasonable speed and quality.
-//
-// The time taken depends on the size of dr. For kernel interpolators, the
-// speed also depends on the size of sr, and so are often slower than
-// non-kernel interpolators, especially when scaling down.
-type Interpolator interface {
- Scaler
- Transformer
-}
-
-// Kernel is an interpolator that blends source pixels weighted by a symmetric
-// kernel function.
-type Kernel struct {
- // Support is the kernel support and must be >= 0. At(t) is assumed to be
- // zero when t >= Support.
- Support float64
- // At is the kernel function. It will only be called with t in the
- // range [0, Support).
- At func(t float64) float64
-}
-
-// Scale implements the Scaler interface.
-func (q *Kernel) Scale(dst Image, dr image.Rectangle, src image.Image, sr image.Rectangle, op Op, opts *Options) {
- q.newScaler(dr.Dx(), dr.Dy(), sr.Dx(), sr.Dy(), false).Scale(dst, dr, src, sr, op, opts)
-}
-
-// NewScaler returns a Scaler that is optimized for scaling multiple times with
-// the same fixed destination and source width and height.
-func (q *Kernel) NewScaler(dw, dh, sw, sh int) Scaler {
- return q.newScaler(dw, dh, sw, sh, true)
-}
-
-func (q *Kernel) newScaler(dw, dh, sw, sh int, usePool bool) Scaler {
- z := &kernelScaler{
- kernel: q,
- dw: int32(dw),
- dh: int32(dh),
- sw: int32(sw),
- sh: int32(sh),
- horizontal: newDistrib(q, int32(dw), int32(sw)),
- vertical: newDistrib(q, int32(dh), int32(sh)),
- }
- if usePool {
- z.pool.New = func() interface{} {
- tmp := z.makeTmpBuf()
- return &tmp
- }
- }
- return z
-}
-
-var (
- // NearestNeighbor is the nearest neighbor interpolator. It is very fast,
- // but usually gives very low quality results. When scaling up, the result
- // will look 'blocky'.
- NearestNeighbor = Interpolator(nnInterpolator{})
-
- // ApproxBiLinear is a mixture of the nearest neighbor and bi-linear
- // interpolators. It is fast, but usually gives medium quality results.
- //
- // It implements bi-linear interpolation when upscaling and a bi-linear
- // blend of the 4 nearest neighbor pixels when downscaling. This yields
- // nicer quality than nearest neighbor interpolation when upscaling, but
- // the time taken is independent of the number of source pixels, unlike the
- // bi-linear interpolator. When downscaling a large image, the performance
- // difference can be significant.
- ApproxBiLinear = Interpolator(ablInterpolator{})
-
- // BiLinear is the tent kernel. It is slow, but usually gives high quality
- // results.
- BiLinear = &Kernel{1, func(t float64) float64 {
- return 1 - t
- }}
-
- // CatmullRom is the Catmull-Rom kernel. It is very slow, but usually gives
- // very high quality results.
- //
- // It is an instance of the more general cubic BC-spline kernel with parameters
- // B=0 and C=0.5. See Mitchell and Netravali, "Reconstruction Filters in
- // Computer Graphics", Computer Graphics, Vol. 22, No. 4, pp. 221-228.
- CatmullRom = &Kernel{2, func(t float64) float64 {
- if t < 1 {
- return (1.5*t-2.5)*t*t + 1
- }
- return ((-0.5*t+2.5)*t-4)*t + 2
- }}
-
- // TODO: a Kaiser-Bessel kernel?
-)
-
-type nnInterpolator struct{}
-
-type ablInterpolator struct{}
-
-type kernelScaler struct {
- kernel *Kernel
- dw, dh, sw, sh int32
- horizontal, vertical distrib
- pool sync.Pool
-}
-
-func (z *kernelScaler) makeTmpBuf() [][4]float64 {
- return make([][4]float64, z.dw*z.sh)
-}
-
-// source is a range of contribs, their inverse total weight, and that ITW
-// divided by 0xffff.
-type source struct {
- i, j int32
- invTotalWeight float64
- invTotalWeightFFFF float64
-}
-
-// contrib is the weight of a column or row.
-type contrib struct {
- coord int32
- weight float64
-}
-
-// distrib measures how source pixels are distributed over destination pixels.
-type distrib struct {
- // sources are what contribs each column or row in the source image owns,
- // and the total weight of those contribs.
- sources []source
- // contribs are the contributions indexed by sources[s].i and sources[s].j.
- contribs []contrib
-}
-
-// newDistrib returns a distrib that distributes sw source columns (or rows)
-// over dw destination columns (or rows).
-func newDistrib(q *Kernel, dw, sw int32) distrib {
- scale := float64(sw) / float64(dw)
- halfWidth, kernelArgScale := q.Support, 1.0
- // When shrinking, broaden the effective kernel support so that we still
- // visit every source pixel.
- if scale > 1 {
- halfWidth *= scale
- kernelArgScale = 1 / scale
- }
-
- // Make the sources slice, one source for each column or row, and temporarily
- // appropriate its elements' fields so that invTotalWeight is the scaled
- // coordinate of the source column or row, and i and j are the lower and
- // upper bounds of the range of destination columns or rows affected by the
- // source column or row.
- n, sources := int32(0), make([]source, dw)
- for x := range sources {
- center := (float64(x)+0.5)*scale - 0.5
- i := int32(math.Floor(center - halfWidth))
- if i < 0 {
- i = 0
- }
- j := int32(math.Ceil(center + halfWidth))
- if j > sw {
- j = sw
- if j < i {
- j = i
- }
- }
- sources[x] = source{i: i, j: j, invTotalWeight: center}
- n += j - i
- }
-
- contribs := make([]contrib, 0, n)
- for k, b := range sources {
- totalWeight := 0.0
- l := int32(len(contribs))
- for coord := b.i; coord < b.j; coord++ {
- t := abs((b.invTotalWeight - float64(coord)) * kernelArgScale)
- if t >= q.Support {
- continue
- }
- weight := q.At(t)
- if weight == 0 {
- continue
- }
- totalWeight += weight
- contribs = append(contribs, contrib{coord, weight})
- }
- totalWeight = 1 / totalWeight
- sources[k] = source{
- i: l,
- j: int32(len(contribs)),
- invTotalWeight: totalWeight,
- invTotalWeightFFFF: totalWeight / 0xffff,
- }
- }
-
- return distrib{sources, contribs}
-}
-
-// abs is like math.Abs, but it doesn't care about negative zero, infinities or
-// NaNs.
-func abs(f float64) float64 {
- if f < 0 {
- f = -f
- }
- return f
-}
-
-// ftou converts the range [0.0, 1.0] to [0, 0xffff].
-func ftou(f float64) uint16 {
- i := int32(0xffff*f + 0.5)
- if i > 0xffff {
- return 0xffff
- }
- if i > 0 {
- return uint16(i)
- }
- return 0
-}
-
-// fffftou converts the range [0.0, 65535.0] to [0, 0xffff].
-func fffftou(f float64) uint16 {
- i := int32(f + 0.5)
- if i > 0xffff {
- return 0xffff
- }
- if i > 0 {
- return uint16(i)
- }
- return 0
-}
-
-// invert returns the inverse of m.
-//
-// TODO: move this into the f64 package, once we work out the convention for
-// matrix methods in that package: do they modify the receiver, take a dst
-// pointer argument, or return a new value?
-func invert(m *f64.Aff3) f64.Aff3 {
- m00 := +m[3*1+1]
- m01 := -m[3*0+1]
- m02 := +m[3*1+2]*m[3*0+1] - m[3*1+1]*m[3*0+2]
- m10 := -m[3*1+0]
- m11 := +m[3*0+0]
- m12 := +m[3*1+0]*m[3*0+2] - m[3*1+2]*m[3*0+0]
-
- det := m00*m11 - m10*m01
-
- return f64.Aff3{
- m00 / det,
- m01 / det,
- m02 / det,
- m10 / det,
- m11 / det,
- m12 / det,
- }
-}
-
-func matMul(p, q *f64.Aff3) f64.Aff3 {
- return f64.Aff3{
- p[3*0+0]*q[3*0+0] + p[3*0+1]*q[3*1+0],
- p[3*0+0]*q[3*0+1] + p[3*0+1]*q[3*1+1],
- p[3*0+0]*q[3*0+2] + p[3*0+1]*q[3*1+2] + p[3*0+2],
- p[3*1+0]*q[3*0+0] + p[3*1+1]*q[3*1+0],
- p[3*1+0]*q[3*0+1] + p[3*1+1]*q[3*1+1],
- p[3*1+0]*q[3*0+2] + p[3*1+1]*q[3*1+2] + p[3*1+2],
- }
-}
-
-// transformRect returns a rectangle dr that contains sr transformed by s2d.
-func transformRect(s2d *f64.Aff3, sr *image.Rectangle) (dr image.Rectangle) {
- ps := [...]image.Point{
- {sr.Min.X, sr.Min.Y},
- {sr.Max.X, sr.Min.Y},
- {sr.Min.X, sr.Max.Y},
- {sr.Max.X, sr.Max.Y},
- }
- for i, p := range ps {
- sxf := float64(p.X)
- syf := float64(p.Y)
- dx := int(math.Floor(s2d[0]*sxf + s2d[1]*syf + s2d[2]))
- dy := int(math.Floor(s2d[3]*sxf + s2d[4]*syf + s2d[5]))
-
- // The +1 adjustments below are because an image.Rectangle is inclusive
- // on the low end but exclusive on the high end.
-
- if i == 0 {
- dr = image.Rectangle{
- Min: image.Point{dx + 0, dy + 0},
- Max: image.Point{dx + 1, dy + 1},
- }
- continue
- }
-
- if dr.Min.X > dx {
- dr.Min.X = dx
- }
- dx++
- if dr.Max.X < dx {
- dr.Max.X = dx
- }
-
- if dr.Min.Y > dy {
- dr.Min.Y = dy
- }
- dy++
- if dr.Max.Y < dy {
- dr.Max.Y = dy
- }
- }
- return dr
-}
-
-func clipAffectedDestRect(adr image.Rectangle, dstMask image.Image, dstMaskP image.Point) (image.Rectangle, image.Image) {
- if dstMask == nil {
- return adr, nil
- }
- // TODO: enable this fast path once Go 1.5 is released, where an
- // image.Rectangle implements image.Image.
- // if r, ok := dstMask.(image.Rectangle); ok {
- // return adr.Intersect(r.Sub(dstMaskP)), nil
- // }
- // TODO: clip to dstMask.Bounds() if the color model implies that out-of-bounds means 0 alpha?
- return adr, dstMask
-}
-
-func transform_Uniform(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.Uniform, sr image.Rectangle, bias image.Point, op Op) {
- switch op {
- case Over:
- switch dst := dst.(type) {
- case *image.RGBA:
- pr, pg, pb, pa := src.C.RGBA()
- pa1 := (0xffff - pa) * 0x101
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := dst.PixOffset(dr.Min.X+adr.Min.X, dr.Min.Y+int(dy))
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
- dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
- dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
- dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
- }
- }
-
- default:
- pr, pg, pb, pa := src.C.RGBA()
- pa1 := 0xffff - pa
- dstColorRGBA64 := &color.RGBA64{}
- dstColor := color.Color(dstColorRGBA64)
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
- dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
- dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
- dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
- dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- }
- }
- }
-
- case Src:
- switch dst := dst.(type) {
- case *image.RGBA:
- pr, pg, pb, pa := src.C.RGBA()
- pr8 := uint8(pr >> 8)
- pg8 := uint8(pg >> 8)
- pb8 := uint8(pb >> 8)
- pa8 := uint8(pa >> 8)
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- d := dst.PixOffset(dr.Min.X+adr.Min.X, dr.Min.Y+int(dy))
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- dst.Pix[d+0] = pr8
- dst.Pix[d+1] = pg8
- dst.Pix[d+2] = pb8
- dst.Pix[d+3] = pa8
- }
- }
-
- default:
- pr, pg, pb, pa := src.C.RGBA()
- dstColorRGBA64 := &color.RGBA64{
- uint16(pr),
- uint16(pg),
- uint16(pb),
- uint16(pa),
- }
- dstColor := color.Color(dstColorRGBA64)
-
- for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
- dyf := float64(dr.Min.Y+int(dy)) + 0.5
- for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ {
- dxf := float64(dr.Min.X+int(dx)) + 0.5
- sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
- sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
- if !(image.Point{sx0, sy0}).In(sr) {
- continue
- }
- dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
- }
- }
- }
- }
-}
-
-func opaque(m image.Image) bool {
- o, ok := m.(interface {
- Opaque() bool
- })
- return ok && o.Opaque()
-}