From e1e8d058a33f7566f9c565d04b0d8b56f9645c35 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Wed, 25 Apr 2018 09:28:54 +0200 Subject: add vendor --- vendor/golang.org/x/image/draw/impl.go | 6670 ++++++++++++++++++++++++++++++++ 1 file changed, 6670 insertions(+) create mode 100644 vendor/golang.org/x/image/draw/impl.go (limited to 'vendor/golang.org/x/image/draw/impl.go') 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) + } + } + } +} -- cgit v1.2.3