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path: root/vendor/golang.org/x/image/draw/impl.go
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-rw-r--r--vendor/golang.org/x/image/draw/impl.go6670
1 files changed, 6670 insertions, 0 deletions
diff --git a/vendor/golang.org/x/image/draw/impl.go b/vendor/golang.org/x/image/draw/impl.go
new file mode 100644
index 0000000..75498ad
--- /dev/null
+++ b/vendor/golang.org/x/image/draw/impl.go
@@ -0,0 +1,6670 @@
+// 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)
+ }
+ }
+ }
+}