From 14bb08c1df8db9ec6c8a05520d4eee67971235d9 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Thu, 27 Sep 2018 20:03:23 +0200 Subject: mod tidy --- vendor/golang.org/x/image/draw/impl.go | 6670 -------------------------------- 1 file changed, 6670 deletions(-) delete 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 deleted file mode 100644 index 75498ad..0000000 --- a/vendor/golang.org/x/image/draw/impl.go +++ /dev/null @@ -1,6670 +0,0 @@ -// generated by "go run gen.go". DO NOT EDIT. - -package draw - -import ( - "image" - "image/color" - "math" - - "golang.org/x/image/math/f64" -) - -func (z nnInterpolator) Scale(dst Image, dr image.Rectangle, src image.Image, sr image.Rectangle, op Op, opts *Options) { - // Try to simplify a Scale to a Copy when DstMask is not specified. - // If DstMask is not nil, Copy will call Scale back with same dr and sr, and cause stack overflow. - if dr.Size() == sr.Size() && (opts == nil || opts.DstMask == nil) { - Copy(dst, dr.Min, src, sr, op, opts) - return - } - - var o Options - if opts != nil { - o = *opts - } - - // adr is the affected destination pixels. - adr := dst.Bounds().Intersect(dr) - adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP) - if adr.Empty() || sr.Empty() { - return - } - // Make adr relative to dr.Min. - adr = adr.Sub(dr.Min) - if op == Over && o.SrcMask == nil && opaque(src) { - op = Src - } - - // sr is the source pixels. If it extends beyond the src bounds, - // we cannot use the type-specific fast paths, as they access - // the Pix fields directly without bounds checking. - // - // Similarly, the fast paths assume that the masks are nil. - if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) { - switch op { - case Over: - z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o) - case Src: - z.scale_Image_Image_Src(dst, dr, adr, src, sr, &o) - } - } else if _, ok := src.(*image.Uniform); ok { - Draw(dst, dr, src, src.Bounds().Min, op) - } else { - switch op { - case Over: - switch dst := dst.(type) { - case *image.RGBA: - switch src := src.(type) { - case *image.NRGBA: - z.scale_RGBA_NRGBA_Over(dst, dr, adr, src, sr, &o) - case *image.RGBA: - z.scale_RGBA_RGBA_Over(dst, dr, adr, src, sr, &o) - default: - z.scale_RGBA_Image_Over(dst, dr, adr, src, sr, &o) - } - default: - switch src := src.(type) { - default: - z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o) - } - } - case Src: - switch dst := dst.(type) { - case *image.RGBA: - switch src := src.(type) { - case *image.Gray: - z.scale_RGBA_Gray_Src(dst, dr, adr, src, sr, &o) - case *image.NRGBA: - z.scale_RGBA_NRGBA_Src(dst, dr, adr, src, sr, &o) - case *image.RGBA: - z.scale_RGBA_RGBA_Src(dst, dr, adr, src, sr, &o) - case *image.YCbCr: - switch src.SubsampleRatio { - default: - z.scale_RGBA_Image_Src(dst, dr, adr, src, sr, &o) - case image.YCbCrSubsampleRatio444: - z.scale_RGBA_YCbCr444_Src(dst, dr, adr, src, sr, &o) - case image.YCbCrSubsampleRatio422: - z.scale_RGBA_YCbCr422_Src(dst, dr, adr, src, sr, &o) - case image.YCbCrSubsampleRatio420: - z.scale_RGBA_YCbCr420_Src(dst, dr, adr, src, sr, &o) - case image.YCbCrSubsampleRatio440: - z.scale_RGBA_YCbCr440_Src(dst, dr, adr, src, sr, &o) - } - default: - z.scale_RGBA_Image_Src(dst, dr, adr, src, sr, &o) - } - default: - switch src := src.(type) { - default: - z.scale_Image_Image_Src(dst, dr, adr, src, sr, &o) - } - } - } - } -} - -func (z nnInterpolator) Transform(dst Image, s2d f64.Aff3, src image.Image, sr image.Rectangle, op Op, opts *Options) { - // Try to simplify a Transform to a Copy. - if s2d[0] == 1 && s2d[1] == 0 && s2d[3] == 0 && s2d[4] == 1 { - dx := int(s2d[2]) - dy := int(s2d[5]) - if float64(dx) == s2d[2] && float64(dy) == s2d[5] { - Copy(dst, image.Point{X: sr.Min.X + dx, Y: sr.Min.X + dy}, src, sr, op, opts) - return - } - } - - var o Options - if opts != nil { - o = *opts - } - - dr := transformRect(&s2d, &sr) - // adr is the affected destination pixels. - adr := dst.Bounds().Intersect(dr) - adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP) - if adr.Empty() || sr.Empty() { - return - } - if op == Over && o.SrcMask == nil && opaque(src) { - op = Src - } - - d2s := invert(&s2d) - // bias is a translation of the mapping from dst coordinates to src - // coordinates such that the latter temporarily have non-negative X - // and Y coordinates. This allows us to write int(f) instead of - // int(math.Floor(f)), since "round to zero" and "round down" are - // equivalent when f >= 0, but the former is much cheaper. The X-- - // and Y-- are because the TransformLeaf methods have a "sx -= 0.5" - // adjustment. - bias := transformRect(&d2s, &adr).Min - bias.X-- - bias.Y-- - d2s[2] -= float64(bias.X) - d2s[5] -= float64(bias.Y) - // Make adr relative to dr.Min. - adr = adr.Sub(dr.Min) - // sr is the source pixels. If it extends beyond the src bounds, - // we cannot use the type-specific fast paths, as they access - // the Pix fields directly without bounds checking. - // - // Similarly, the fast paths assume that the masks are nil. - if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) { - switch op { - case Over: - z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o) - case Src: - z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - } - } else if u, ok := src.(*image.Uniform); ok { - transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op) - } else { - switch op { - case Over: - switch dst := dst.(type) { - case *image.RGBA: - switch src := src.(type) { - case *image.NRGBA: - z.transform_RGBA_NRGBA_Over(dst, dr, adr, &d2s, src, sr, bias, &o) - case *image.RGBA: - z.transform_RGBA_RGBA_Over(dst, dr, adr, &d2s, src, sr, bias, &o) - default: - z.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o) - } - default: - switch src := src.(type) { - default: - z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o) - } - } - case Src: - switch dst := dst.(type) { - case *image.RGBA: - switch src := src.(type) { - case *image.Gray: - z.transform_RGBA_Gray_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case *image.NRGBA: - z.transform_RGBA_NRGBA_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case *image.RGBA: - z.transform_RGBA_RGBA_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case *image.YCbCr: - switch src.SubsampleRatio { - default: - z.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case image.YCbCrSubsampleRatio444: - z.transform_RGBA_YCbCr444_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case image.YCbCrSubsampleRatio422: - z.transform_RGBA_YCbCr422_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case image.YCbCrSubsampleRatio420: - z.transform_RGBA_YCbCr420_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case image.YCbCrSubsampleRatio440: - z.transform_RGBA_YCbCr440_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - } - default: - z.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - } - default: - switch src := src.(type) { - default: - z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - } - } - } - } -} - -func (nnInterpolator) scale_RGBA_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.Gray, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (2*uint64(dx) + 1) * sw / dw2 - pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(sx) - src.Rect.Min.X) - pr := uint32(src.Pix[pi]) * 0x101 - out := uint8(pr >> 8) - dst.Pix[d+0] = out - dst.Pix[d+1] = out - dst.Pix[d+2] = out - dst.Pix[d+3] = 0xff - } - } -} - -func (nnInterpolator) scale_RGBA_NRGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.NRGBA, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (2*uint64(dx) + 1) * sw / dw2 - pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4 - pa := uint32(src.Pix[pi+3]) * 0x101 - pr := uint32(src.Pix[pi+0]) * pa / 0xff - pg := uint32(src.Pix[pi+1]) * pa / 0xff - pb := uint32(src.Pix[pi+2]) * pa / 0xff - pa1 := (0xffff - pa) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8) - } - } -} - -func (nnInterpolator) scale_RGBA_NRGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.NRGBA, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (2*uint64(dx) + 1) * sw / dw2 - pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4 - pa := uint32(src.Pix[pi+3]) * 0x101 - pr := uint32(src.Pix[pi+0]) * pa / 0xff - pg := uint32(src.Pix[pi+1]) * pa / 0xff - pb := uint32(src.Pix[pi+2]) * pa / 0xff - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = uint8(pa >> 8) - } - } -} - -func (nnInterpolator) scale_RGBA_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.RGBA, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (2*uint64(dx) + 1) * sw / dw2 - pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4 - pr := uint32(src.Pix[pi+0]) * 0x101 - pg := uint32(src.Pix[pi+1]) * 0x101 - pb := uint32(src.Pix[pi+2]) * 0x101 - pa := uint32(src.Pix[pi+3]) * 0x101 - pa1 := (0xffff - pa) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8) - } - } -} - -func (nnInterpolator) scale_RGBA_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.RGBA, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (2*uint64(dx) + 1) * sw / dw2 - pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4 - pr := uint32(src.Pix[pi+0]) * 0x101 - pg := uint32(src.Pix[pi+1]) * 0x101 - pb := uint32(src.Pix[pi+2]) * 0x101 - pa := uint32(src.Pix[pi+3]) * 0x101 - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = uint8(pa >> 8) - } - } -} - -func (nnInterpolator) scale_RGBA_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (2*uint64(dx) + 1) * sw / dw2 - pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X) - pj := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx) - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pr := (pyy1 + 91881*pcr1) >> 8 - pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pb := (pyy1 + 116130*pcb1) >> 8 - if pr < 0 { - pr = 0 - } else if pr > 0xffff { - pr = 0xffff - } - if pg < 0 { - pg = 0 - } else if pg > 0xffff { - pg = 0xffff - } - if pb < 0 { - pb = 0 - } else if pb > 0xffff { - pb = 0xffff - } - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (nnInterpolator) scale_RGBA_YCbCr422_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (2*uint64(dx) + 1) * sw / dw2 - pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X) - pj := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx))/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pr := (pyy1 + 91881*pcr1) >> 8 - pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pb := (pyy1 + 116130*pcb1) >> 8 - if pr < 0 { - pr = 0 - } else if pr > 0xffff { - pr = 0xffff - } - if pg < 0 { - pg = 0 - } else if pg > 0xffff { - pg = 0xffff - } - if pb < 0 { - pb = 0 - } else if pb > 0xffff { - pb = 0xffff - } - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (nnInterpolator) scale_RGBA_YCbCr420_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (2*uint64(dx) + 1) * sw / dw2 - pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X) - pj := ((sr.Min.Y+int(sy))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx))/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pr := (pyy1 + 91881*pcr1) >> 8 - pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pb := (pyy1 + 116130*pcb1) >> 8 - if pr < 0 { - pr = 0 - } else if pr > 0xffff { - pr = 0xffff - } - if pg < 0 { - pg = 0 - } else if pg > 0xffff { - pg = 0xffff - } - if pb < 0 { - pb = 0 - } else if pb > 0xffff { - pb = 0xffff - } - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (nnInterpolator) scale_RGBA_YCbCr440_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (2*uint64(dx) + 1) * sw / dw2 - pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X) - pj := ((sr.Min.Y+int(sy))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx) - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pr := (pyy1 + 91881*pcr1) >> 8 - pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pb := (pyy1 + 116130*pcb1) >> 8 - if pr < 0 { - pr = 0 - } else if pr > 0xffff { - pr = 0xffff - } - if pg < 0 { - pg = 0 - } else if pg > 0xffff { - pg = 0xffff - } - if pb < 0 { - pb = 0 - } else if pb > 0xffff { - pb = 0xffff - } - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (nnInterpolator) scale_RGBA_Image_Over(dst *image.RGBA, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (2*uint64(dx) + 1) * sw / dw2 - pr, pg, pb, pa := src.At(sr.Min.X+int(sx), sr.Min.Y+int(sy)).RGBA() - pa1 := (0xffff - pa) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8) - } - } -} - -func (nnInterpolator) scale_RGBA_Image_Src(dst *image.RGBA, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (2*uint64(dx) + 1) * sw / dw2 - pr, pg, pb, pa := src.At(sr.Min.X+int(sx), sr.Min.Y+int(sy)).RGBA() - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = uint8(pa >> 8) - } - } -} - -func (nnInterpolator) scale_Image_Image_Over(dst Image, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - srcMask, smp := opts.SrcMask, opts.SrcMaskP - dstMask, dmp := opts.DstMask, opts.DstMaskP - dstColorRGBA64 := &color.RGBA64{} - dstColor := color.Color(dstColorRGBA64) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - sx := (2*uint64(dx) + 1) * sw / dw2 - pr, pg, pb, pa := src.At(sr.Min.X+int(sx), sr.Min.Y+int(sy)).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx), smp.Y+sr.Min.Y+int(sy)).RGBA() - pr = pr * ma / 0xffff - pg = pg * ma / 0xffff - pb = pb * ma / 0xffff - pa = pa * ma / 0xffff - } - qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA() - if dstMask != nil { - _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA() - pr = pr * ma / 0xffff - pg = pg * ma / 0xffff - pb = pb * ma / 0xffff - pa = pa * ma / 0xffff - } - pa1 := 0xffff - pa - dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr) - dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg) - dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb) - dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } - } -} - -func (nnInterpolator) scale_Image_Image_Src(dst Image, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) { - dw2 := uint64(dr.Dx()) * 2 - dh2 := uint64(dr.Dy()) * 2 - sw := uint64(sr.Dx()) - sh := uint64(sr.Dy()) - srcMask, smp := opts.SrcMask, opts.SrcMaskP - dstMask, dmp := opts.DstMask, opts.DstMaskP - dstColorRGBA64 := &color.RGBA64{} - dstColor := color.Color(dstColorRGBA64) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (2*uint64(dy) + 1) * sh / dh2 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - sx := (2*uint64(dx) + 1) * sw / dw2 - pr, pg, pb, pa := src.At(sr.Min.X+int(sx), sr.Min.Y+int(sy)).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx), smp.Y+sr.Min.Y+int(sy)).RGBA() - pr = pr * ma / 0xffff - pg = pg * ma / 0xffff - pb = pb * ma / 0xffff - pa = pa * ma / 0xffff - } - if dstMask != nil { - qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA() - _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA() - pr = pr * ma / 0xffff - pg = pg * ma / 0xffff - pb = pb * ma / 0xffff - pa = pa * ma / 0xffff - pa1 := 0xffff - ma - dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr) - dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg) - dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb) - dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } else { - dstColorRGBA64.R = uint16(pr) - dstColorRGBA64.G = uint16(pg) - dstColorRGBA64.B = uint16(pb) - dstColorRGBA64.A = uint16(pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } - } - } -} - -func (nnInterpolator) transform_RGBA_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.Gray, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0 - src.Rect.Min.X) - pr := uint32(src.Pix[pi]) * 0x101 - out := uint8(pr >> 8) - dst.Pix[d+0] = out - dst.Pix[d+1] = out - dst.Pix[d+2] = out - dst.Pix[d+3] = 0xff - } - } -} - -func (nnInterpolator) transform_RGBA_NRGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4 - pa := uint32(src.Pix[pi+3]) * 0x101 - pr := uint32(src.Pix[pi+0]) * pa / 0xff - pg := uint32(src.Pix[pi+1]) * pa / 0xff - pb := uint32(src.Pix[pi+2]) * pa / 0xff - pa1 := (0xffff - pa) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8) - } - } -} - -func (nnInterpolator) transform_RGBA_NRGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4 - pa := uint32(src.Pix[pi+3]) * 0x101 - pr := uint32(src.Pix[pi+0]) * pa / 0xff - pg := uint32(src.Pix[pi+1]) * pa / 0xff - pb := uint32(src.Pix[pi+2]) * pa / 0xff - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = uint8(pa >> 8) - } - } -} - -func (nnInterpolator) transform_RGBA_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4 - pr := uint32(src.Pix[pi+0]) * 0x101 - pg := uint32(src.Pix[pi+1]) * 0x101 - pb := uint32(src.Pix[pi+2]) * 0x101 - pa := uint32(src.Pix[pi+3]) * 0x101 - pa1 := (0xffff - pa) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8) - } - } -} - -func (nnInterpolator) transform_RGBA_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4 - pr := uint32(src.Pix[pi+0]) * 0x101 - pg := uint32(src.Pix[pi+1]) * 0x101 - pb := uint32(src.Pix[pi+2]) * 0x101 - pa := uint32(src.Pix[pi+3]) * 0x101 - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = uint8(pa >> 8) - } - } -} - -func (nnInterpolator) transform_RGBA_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pi := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X) - pj := (sy0-src.Rect.Min.Y)*src.CStride + (sx0 - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pr := (pyy1 + 91881*pcr1) >> 8 - pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pb := (pyy1 + 116130*pcb1) >> 8 - if pr < 0 { - pr = 0 - } else if pr > 0xffff { - pr = 0xffff - } - if pg < 0 { - pg = 0 - } else if pg > 0xffff { - pg = 0xffff - } - if pb < 0 { - pb = 0 - } else if pb > 0xffff { - pb = 0xffff - } - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (nnInterpolator) transform_RGBA_YCbCr422_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pi := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X) - pj := (sy0-src.Rect.Min.Y)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pr := (pyy1 + 91881*pcr1) >> 8 - pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pb := (pyy1 + 116130*pcb1) >> 8 - if pr < 0 { - pr = 0 - } else if pr > 0xffff { - pr = 0xffff - } - if pg < 0 { - pg = 0 - } else if pg > 0xffff { - pg = 0xffff - } - if pb < 0 { - pb = 0 - } else if pb > 0xffff { - pb = 0xffff - } - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (nnInterpolator) transform_RGBA_YCbCr420_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pi := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X) - pj := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pr := (pyy1 + 91881*pcr1) >> 8 - pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pb := (pyy1 + 116130*pcb1) >> 8 - if pr < 0 { - pr = 0 - } else if pr > 0xffff { - pr = 0xffff - } - if pg < 0 { - pg = 0 - } else if pg > 0xffff { - pg = 0xffff - } - if pb < 0 { - pb = 0 - } else if pb > 0xffff { - pb = 0xffff - } - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (nnInterpolator) transform_RGBA_YCbCr440_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pi := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X) - pj := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + (sx0 - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pr := (pyy1 + 91881*pcr1) >> 8 - pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pb := (pyy1 + 116130*pcb1) >> 8 - if pr < 0 { - pr = 0 - } else if pr > 0xffff { - pr = 0xffff - } - if pg < 0 { - pg = 0 - } else if pg > 0xffff { - pg = 0xffff - } - if pb < 0 { - pb = 0 - } else if pb > 0xffff { - pb = 0xffff - } - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (nnInterpolator) transform_RGBA_Image_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pr, pg, pb, pa := src.At(sx0, sy0).RGBA() - pa1 := (0xffff - pa) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8) - } - } -} - -func (nnInterpolator) transform_RGBA_Image_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pr, pg, pb, pa := src.At(sx0, sy0).RGBA() - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = uint8(pa >> 8) - } - } -} - -func (nnInterpolator) transform_Image_Image_Over(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) { - srcMask, smp := opts.SrcMask, opts.SrcMaskP - dstMask, dmp := opts.DstMask, opts.DstMaskP - dstColorRGBA64 := &color.RGBA64{} - dstColor := color.Color(dstColorRGBA64) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pr, pg, pb, pa := src.At(sx0, sy0).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sx0, smp.Y+sy0).RGBA() - pr = pr * ma / 0xffff - pg = pg * ma / 0xffff - pb = pb * ma / 0xffff - pa = pa * ma / 0xffff - } - qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA() - if dstMask != nil { - _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA() - pr = pr * ma / 0xffff - pg = pg * ma / 0xffff - pb = pb * ma / 0xffff - pa = pa * ma / 0xffff - } - pa1 := 0xffff - pa - dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr) - dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg) - dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb) - dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } - } -} - -func (nnInterpolator) transform_Image_Image_Src(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) { - srcMask, smp := opts.SrcMask, opts.SrcMaskP - dstMask, dmp := opts.DstMask, opts.DstMaskP - dstColorRGBA64 := &color.RGBA64{} - dstColor := color.Color(dstColorRGBA64) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X - sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y - if !(image.Point{sx0, sy0}).In(sr) { - continue - } - pr, pg, pb, pa := src.At(sx0, sy0).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sx0, smp.Y+sy0).RGBA() - pr = pr * ma / 0xffff - pg = pg * ma / 0xffff - pb = pb * ma / 0xffff - pa = pa * ma / 0xffff - } - if dstMask != nil { - qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA() - _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA() - pr = pr * ma / 0xffff - pg = pg * ma / 0xffff - pb = pb * ma / 0xffff - pa = pa * ma / 0xffff - pa1 := 0xffff - ma - dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr) - dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg) - dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb) - dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } else { - dstColorRGBA64.R = uint16(pr) - dstColorRGBA64.G = uint16(pg) - dstColorRGBA64.B = uint16(pb) - dstColorRGBA64.A = uint16(pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } - } - } -} - -func (z ablInterpolator) Scale(dst Image, dr image.Rectangle, src image.Image, sr image.Rectangle, op Op, opts *Options) { - // Try to simplify a Scale to a Copy when DstMask is not specified. - // If DstMask is not nil, Copy will call Scale back with same dr and sr, and cause stack overflow. - if dr.Size() == sr.Size() && (opts == nil || opts.DstMask == nil) { - Copy(dst, dr.Min, src, sr, op, opts) - return - } - - var o Options - if opts != nil { - o = *opts - } - - // adr is the affected destination pixels. - adr := dst.Bounds().Intersect(dr) - adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP) - if adr.Empty() || sr.Empty() { - return - } - // Make adr relative to dr.Min. - adr = adr.Sub(dr.Min) - if op == Over && o.SrcMask == nil && opaque(src) { - op = Src - } - - // sr is the source pixels. If it extends beyond the src bounds, - // we cannot use the type-specific fast paths, as they access - // the Pix fields directly without bounds checking. - // - // Similarly, the fast paths assume that the masks are nil. - if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) { - switch op { - case Over: - z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o) - case Src: - z.scale_Image_Image_Src(dst, dr, adr, src, sr, &o) - } - } else if _, ok := src.(*image.Uniform); ok { - Draw(dst, dr, src, src.Bounds().Min, op) - } else { - switch op { - case Over: - switch dst := dst.(type) { - case *image.RGBA: - switch src := src.(type) { - case *image.NRGBA: - z.scale_RGBA_NRGBA_Over(dst, dr, adr, src, sr, &o) - case *image.RGBA: - z.scale_RGBA_RGBA_Over(dst, dr, adr, src, sr, &o) - default: - z.scale_RGBA_Image_Over(dst, dr, adr, src, sr, &o) - } - default: - switch src := src.(type) { - default: - z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o) - } - } - case Src: - switch dst := dst.(type) { - case *image.RGBA: - switch src := src.(type) { - case *image.Gray: - z.scale_RGBA_Gray_Src(dst, dr, adr, src, sr, &o) - case *image.NRGBA: - z.scale_RGBA_NRGBA_Src(dst, dr, adr, src, sr, &o) - case *image.RGBA: - z.scale_RGBA_RGBA_Src(dst, dr, adr, src, sr, &o) - case *image.YCbCr: - switch src.SubsampleRatio { - default: - z.scale_RGBA_Image_Src(dst, dr, adr, src, sr, &o) - case image.YCbCrSubsampleRatio444: - z.scale_RGBA_YCbCr444_Src(dst, dr, adr, src, sr, &o) - case image.YCbCrSubsampleRatio422: - z.scale_RGBA_YCbCr422_Src(dst, dr, adr, src, sr, &o) - case image.YCbCrSubsampleRatio420: - z.scale_RGBA_YCbCr420_Src(dst, dr, adr, src, sr, &o) - case image.YCbCrSubsampleRatio440: - z.scale_RGBA_YCbCr440_Src(dst, dr, adr, src, sr, &o) - } - default: - z.scale_RGBA_Image_Src(dst, dr, adr, src, sr, &o) - } - default: - switch src := src.(type) { - default: - z.scale_Image_Image_Src(dst, dr, adr, src, sr, &o) - } - } - } - } -} - -func (z ablInterpolator) Transform(dst Image, s2d f64.Aff3, src image.Image, sr image.Rectangle, op Op, opts *Options) { - // Try to simplify a Transform to a Copy. - if s2d[0] == 1 && s2d[1] == 0 && s2d[3] == 0 && s2d[4] == 1 { - dx := int(s2d[2]) - dy := int(s2d[5]) - if float64(dx) == s2d[2] && float64(dy) == s2d[5] { - Copy(dst, image.Point{X: sr.Min.X + dx, Y: sr.Min.X + dy}, src, sr, op, opts) - return - } - } - - var o Options - if opts != nil { - o = *opts - } - - dr := transformRect(&s2d, &sr) - // adr is the affected destination pixels. - adr := dst.Bounds().Intersect(dr) - adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP) - if adr.Empty() || sr.Empty() { - return - } - if op == Over && o.SrcMask == nil && opaque(src) { - op = Src - } - - d2s := invert(&s2d) - // bias is a translation of the mapping from dst coordinates to src - // coordinates such that the latter temporarily have non-negative X - // and Y coordinates. This allows us to write int(f) instead of - // int(math.Floor(f)), since "round to zero" and "round down" are - // equivalent when f >= 0, but the former is much cheaper. The X-- - // and Y-- are because the TransformLeaf methods have a "sx -= 0.5" - // adjustment. - bias := transformRect(&d2s, &adr).Min - bias.X-- - bias.Y-- - d2s[2] -= float64(bias.X) - d2s[5] -= float64(bias.Y) - // Make adr relative to dr.Min. - adr = adr.Sub(dr.Min) - // sr is the source pixels. If it extends beyond the src bounds, - // we cannot use the type-specific fast paths, as they access - // the Pix fields directly without bounds checking. - // - // Similarly, the fast paths assume that the masks are nil. - if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) { - switch op { - case Over: - z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o) - case Src: - z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - } - } else if u, ok := src.(*image.Uniform); ok { - transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op) - } else { - switch op { - case Over: - switch dst := dst.(type) { - case *image.RGBA: - switch src := src.(type) { - case *image.NRGBA: - z.transform_RGBA_NRGBA_Over(dst, dr, adr, &d2s, src, sr, bias, &o) - case *image.RGBA: - z.transform_RGBA_RGBA_Over(dst, dr, adr, &d2s, src, sr, bias, &o) - default: - z.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o) - } - default: - switch src := src.(type) { - default: - z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o) - } - } - case Src: - switch dst := dst.(type) { - case *image.RGBA: - switch src := src.(type) { - case *image.Gray: - z.transform_RGBA_Gray_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case *image.NRGBA: - z.transform_RGBA_NRGBA_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case *image.RGBA: - z.transform_RGBA_RGBA_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case *image.YCbCr: - switch src.SubsampleRatio { - default: - z.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case image.YCbCrSubsampleRatio444: - z.transform_RGBA_YCbCr444_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case image.YCbCrSubsampleRatio422: - z.transform_RGBA_YCbCr422_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case image.YCbCrSubsampleRatio420: - z.transform_RGBA_YCbCr420_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - case image.YCbCrSubsampleRatio440: - z.transform_RGBA_YCbCr440_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - } - default: - z.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - } - default: - switch src := src.(type) { - default: - z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o) - } - } - } - } -} - -func (ablInterpolator) scale_RGBA_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.Gray, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - s00ru := uint32(src.Pix[s00i]) * 0x101 - s00r := float64(s00ru) - s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - s10ru := uint32(src.Pix[s10i]) * 0x101 - s10r := float64(s10ru) - s10r = xFrac1*s00r + xFrac0*s10r - s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - s01ru := uint32(src.Pix[s01i]) * 0x101 - s01r := float64(s01ru) - s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - s11ru := uint32(src.Pix[s11i]) * 0x101 - s11r := float64(s11ru) - s11r = xFrac1*s01r + xFrac0*s11r - s11r = yFrac1*s10r + yFrac0*s11r - pr := uint32(s11r) - out := uint8(pr >> 8) - dst.Pix[d+0] = out - dst.Pix[d+1] = out - dst.Pix[d+2] = out - dst.Pix[d+3] = 0xff - } - } -} - -func (ablInterpolator) scale_RGBA_NRGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.NRGBA, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4 - s00au := uint32(src.Pix[s00i+3]) * 0x101 - s00ru := uint32(src.Pix[s00i+0]) * s00au / 0xff - s00gu := uint32(src.Pix[s00i+1]) * s00au / 0xff - s00bu := uint32(src.Pix[s00i+2]) * s00au / 0xff - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4 - s10au := uint32(src.Pix[s10i+3]) * 0x101 - s10ru := uint32(src.Pix[s10i+0]) * s10au / 0xff - s10gu := uint32(src.Pix[s10i+1]) * s10au / 0xff - s10bu := uint32(src.Pix[s10i+2]) * s10au / 0xff - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4 - s01au := uint32(src.Pix[s01i+3]) * 0x101 - s01ru := uint32(src.Pix[s01i+0]) * s01au / 0xff - s01gu := uint32(src.Pix[s01i+1]) * s01au / 0xff - s01bu := uint32(src.Pix[s01i+2]) * s01au / 0xff - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4 - s11au := uint32(src.Pix[s11i+3]) * 0x101 - s11ru := uint32(src.Pix[s11i+0]) * s11au / 0xff - s11gu := uint32(src.Pix[s11i+1]) * s11au / 0xff - s11bu := uint32(src.Pix[s11i+2]) * s11au / 0xff - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - pa1 := (0xffff - pa) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8) - } - } -} - -func (ablInterpolator) scale_RGBA_NRGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.NRGBA, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4 - s00au := uint32(src.Pix[s00i+3]) * 0x101 - s00ru := uint32(src.Pix[s00i+0]) * s00au / 0xff - s00gu := uint32(src.Pix[s00i+1]) * s00au / 0xff - s00bu := uint32(src.Pix[s00i+2]) * s00au / 0xff - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4 - s10au := uint32(src.Pix[s10i+3]) * 0x101 - s10ru := uint32(src.Pix[s10i+0]) * s10au / 0xff - s10gu := uint32(src.Pix[s10i+1]) * s10au / 0xff - s10bu := uint32(src.Pix[s10i+2]) * s10au / 0xff - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4 - s01au := uint32(src.Pix[s01i+3]) * 0x101 - s01ru := uint32(src.Pix[s01i+0]) * s01au / 0xff - s01gu := uint32(src.Pix[s01i+1]) * s01au / 0xff - s01bu := uint32(src.Pix[s01i+2]) * s01au / 0xff - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4 - s11au := uint32(src.Pix[s11i+3]) * 0x101 - s11ru := uint32(src.Pix[s11i+0]) * s11au / 0xff - s11gu := uint32(src.Pix[s11i+1]) * s11au / 0xff - s11bu := uint32(src.Pix[s11i+2]) * s11au / 0xff - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = uint8(pa >> 8) - } - } -} - -func (ablInterpolator) scale_RGBA_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.RGBA, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4 - s00ru := uint32(src.Pix[s00i+0]) * 0x101 - s00gu := uint32(src.Pix[s00i+1]) * 0x101 - s00bu := uint32(src.Pix[s00i+2]) * 0x101 - s00au := uint32(src.Pix[s00i+3]) * 0x101 - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4 - s10ru := uint32(src.Pix[s10i+0]) * 0x101 - s10gu := uint32(src.Pix[s10i+1]) * 0x101 - s10bu := uint32(src.Pix[s10i+2]) * 0x101 - s10au := uint32(src.Pix[s10i+3]) * 0x101 - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4 - s01ru := uint32(src.Pix[s01i+0]) * 0x101 - s01gu := uint32(src.Pix[s01i+1]) * 0x101 - s01bu := uint32(src.Pix[s01i+2]) * 0x101 - s01au := uint32(src.Pix[s01i+3]) * 0x101 - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4 - s11ru := uint32(src.Pix[s11i+0]) * 0x101 - s11gu := uint32(src.Pix[s11i+1]) * 0x101 - s11bu := uint32(src.Pix[s11i+2]) * 0x101 - s11au := uint32(src.Pix[s11i+3]) * 0x101 - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - pa1 := (0xffff - pa) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8) - } - } -} - -func (ablInterpolator) scale_RGBA_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.RGBA, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4 - s00ru := uint32(src.Pix[s00i+0]) * 0x101 - s00gu := uint32(src.Pix[s00i+1]) * 0x101 - s00bu := uint32(src.Pix[s00i+2]) * 0x101 - s00au := uint32(src.Pix[s00i+3]) * 0x101 - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4 - s10ru := uint32(src.Pix[s10i+0]) * 0x101 - s10gu := uint32(src.Pix[s10i+1]) * 0x101 - s10bu := uint32(src.Pix[s10i+2]) * 0x101 - s10au := uint32(src.Pix[s10i+3]) * 0x101 - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx0)-src.Rect.Min.X)*4 - s01ru := uint32(src.Pix[s01i+0]) * 0x101 - s01gu := uint32(src.Pix[s01i+1]) * 0x101 - s01bu := uint32(src.Pix[s01i+2]) * 0x101 - s01au := uint32(src.Pix[s01i+3]) * 0x101 - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx1)-src.Rect.Min.X)*4 - s11ru := uint32(src.Pix[s11i+0]) * 0x101 - s11gu := uint32(src.Pix[s11i+1]) * 0x101 - s11bu := uint32(src.Pix[s11i+2]) * 0x101 - s11au := uint32(src.Pix[s11i+3]) * 0x101 - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = uint8(pa >> 8) - } - } -} - -func (ablInterpolator) scale_RGBA_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - s00j := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s00yy1 := int(src.Y[s00i]) * 0x10101 - s00cb1 := int(src.Cb[s00j]) - 128 - s00cr1 := int(src.Cr[s00j]) - 128 - s00ru := (s00yy1 + 91881*s00cr1) >> 8 - s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8 - s00bu := (s00yy1 + 116130*s00cb1) >> 8 - if s00ru < 0 { - s00ru = 0 - } else if s00ru > 0xffff { - s00ru = 0xffff - } - if s00gu < 0 { - s00gu = 0 - } else if s00gu > 0xffff { - s00gu = 0xffff - } - if s00bu < 0 { - s00bu = 0 - } else if s00bu > 0xffff { - s00bu = 0xffff - } - - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - s10j := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s10yy1 := int(src.Y[s10i]) * 0x10101 - s10cb1 := int(src.Cb[s10j]) - 128 - s10cr1 := int(src.Cr[s10j]) - 128 - s10ru := (s10yy1 + 91881*s10cr1) >> 8 - s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8 - s10bu := (s10yy1 + 116130*s10cb1) >> 8 - if s10ru < 0 { - s10ru = 0 - } else if s10ru > 0xffff { - s10ru = 0xffff - } - if s10gu < 0 { - s10gu = 0 - } else if s10gu > 0xffff { - s10gu = 0xffff - } - if s10bu < 0 { - s10bu = 0 - } else if s10bu > 0xffff { - s10bu = 0xffff - } - - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - s01j := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s01yy1 := int(src.Y[s01i]) * 0x10101 - s01cb1 := int(src.Cb[s01j]) - 128 - s01cr1 := int(src.Cr[s01j]) - 128 - s01ru := (s01yy1 + 91881*s01cr1) >> 8 - s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8 - s01bu := (s01yy1 + 116130*s01cb1) >> 8 - if s01ru < 0 { - s01ru = 0 - } else if s01ru > 0xffff { - s01ru = 0xffff - } - if s01gu < 0 { - s01gu = 0 - } else if s01gu > 0xffff { - s01gu = 0xffff - } - if s01bu < 0 { - s01bu = 0 - } else if s01bu > 0xffff { - s01bu = 0xffff - } - - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - s11j := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s11yy1 := int(src.Y[s11i]) * 0x10101 - s11cb1 := int(src.Cb[s11j]) - 128 - s11cr1 := int(src.Cr[s11j]) - 128 - s11ru := (s11yy1 + 91881*s11cr1) >> 8 - s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8 - s11bu := (s11yy1 + 116130*s11cb1) >> 8 - if s11ru < 0 { - s11ru = 0 - } else if s11ru > 0xffff { - s11ru = 0xffff - } - if s11gu < 0 { - s11gu = 0 - } else if s11gu > 0xffff { - s11gu = 0xffff - } - if s11bu < 0 { - s11bu = 0 - } else if s11bu > 0xffff { - s11bu = 0xffff - } - - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (ablInterpolator) scale_RGBA_YCbCr422_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - s00j := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx0))/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s00yy1 := int(src.Y[s00i]) * 0x10101 - s00cb1 := int(src.Cb[s00j]) - 128 - s00cr1 := int(src.Cr[s00j]) - 128 - s00ru := (s00yy1 + 91881*s00cr1) >> 8 - s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8 - s00bu := (s00yy1 + 116130*s00cb1) >> 8 - if s00ru < 0 { - s00ru = 0 - } else if s00ru > 0xffff { - s00ru = 0xffff - } - if s00gu < 0 { - s00gu = 0 - } else if s00gu > 0xffff { - s00gu = 0xffff - } - if s00bu < 0 { - s00bu = 0 - } else if s00bu > 0xffff { - s00bu = 0xffff - } - - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - s10j := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx1))/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s10yy1 := int(src.Y[s10i]) * 0x10101 - s10cb1 := int(src.Cb[s10j]) - 128 - s10cr1 := int(src.Cr[s10j]) - 128 - s10ru := (s10yy1 + 91881*s10cr1) >> 8 - s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8 - s10bu := (s10yy1 + 116130*s10cb1) >> 8 - if s10ru < 0 { - s10ru = 0 - } else if s10ru > 0xffff { - s10ru = 0xffff - } - if s10gu < 0 { - s10gu = 0 - } else if s10gu > 0xffff { - s10gu = 0xffff - } - if s10bu < 0 { - s10bu = 0 - } else if s10bu > 0xffff { - s10bu = 0xffff - } - - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - s01j := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx0))/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s01yy1 := int(src.Y[s01i]) * 0x10101 - s01cb1 := int(src.Cb[s01j]) - 128 - s01cr1 := int(src.Cr[s01j]) - 128 - s01ru := (s01yy1 + 91881*s01cr1) >> 8 - s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8 - s01bu := (s01yy1 + 116130*s01cb1) >> 8 - if s01ru < 0 { - s01ru = 0 - } else if s01ru > 0xffff { - s01ru = 0xffff - } - if s01gu < 0 { - s01gu = 0 - } else if s01gu > 0xffff { - s01gu = 0xffff - } - if s01bu < 0 { - s01bu = 0 - } else if s01bu > 0xffff { - s01bu = 0xffff - } - - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - s11j := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx1))/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s11yy1 := int(src.Y[s11i]) * 0x10101 - s11cb1 := int(src.Cb[s11j]) - 128 - s11cr1 := int(src.Cr[s11j]) - 128 - s11ru := (s11yy1 + 91881*s11cr1) >> 8 - s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8 - s11bu := (s11yy1 + 116130*s11cb1) >> 8 - if s11ru < 0 { - s11ru = 0 - } else if s11ru > 0xffff { - s11ru = 0xffff - } - if s11gu < 0 { - s11gu = 0 - } else if s11gu > 0xffff { - s11gu = 0xffff - } - if s11bu < 0 { - s11bu = 0 - } else if s11bu > 0xffff { - s11bu = 0xffff - } - - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (ablInterpolator) scale_RGBA_YCbCr420_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - s00j := ((sr.Min.Y+int(sy0))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx0))/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s00yy1 := int(src.Y[s00i]) * 0x10101 - s00cb1 := int(src.Cb[s00j]) - 128 - s00cr1 := int(src.Cr[s00j]) - 128 - s00ru := (s00yy1 + 91881*s00cr1) >> 8 - s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8 - s00bu := (s00yy1 + 116130*s00cb1) >> 8 - if s00ru < 0 { - s00ru = 0 - } else if s00ru > 0xffff { - s00ru = 0xffff - } - if s00gu < 0 { - s00gu = 0 - } else if s00gu > 0xffff { - s00gu = 0xffff - } - if s00bu < 0 { - s00bu = 0 - } else if s00bu > 0xffff { - s00bu = 0xffff - } - - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - s10j := ((sr.Min.Y+int(sy0))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx1))/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s10yy1 := int(src.Y[s10i]) * 0x10101 - s10cb1 := int(src.Cb[s10j]) - 128 - s10cr1 := int(src.Cr[s10j]) - 128 - s10ru := (s10yy1 + 91881*s10cr1) >> 8 - s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8 - s10bu := (s10yy1 + 116130*s10cb1) >> 8 - if s10ru < 0 { - s10ru = 0 - } else if s10ru > 0xffff { - s10ru = 0xffff - } - if s10gu < 0 { - s10gu = 0 - } else if s10gu > 0xffff { - s10gu = 0xffff - } - if s10bu < 0 { - s10bu = 0 - } else if s10bu > 0xffff { - s10bu = 0xffff - } - - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - s01j := ((sr.Min.Y+int(sy1))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx0))/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s01yy1 := int(src.Y[s01i]) * 0x10101 - s01cb1 := int(src.Cb[s01j]) - 128 - s01cr1 := int(src.Cr[s01j]) - 128 - s01ru := (s01yy1 + 91881*s01cr1) >> 8 - s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8 - s01bu := (s01yy1 + 116130*s01cb1) >> 8 - if s01ru < 0 { - s01ru = 0 - } else if s01ru > 0xffff { - s01ru = 0xffff - } - if s01gu < 0 { - s01gu = 0 - } else if s01gu > 0xffff { - s01gu = 0xffff - } - if s01bu < 0 { - s01bu = 0 - } else if s01bu > 0xffff { - s01bu = 0xffff - } - - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - s11j := ((sr.Min.Y+int(sy1))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx1))/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s11yy1 := int(src.Y[s11i]) * 0x10101 - s11cb1 := int(src.Cb[s11j]) - 128 - s11cr1 := int(src.Cr[s11j]) - 128 - s11ru := (s11yy1 + 91881*s11cr1) >> 8 - s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8 - s11bu := (s11yy1 + 116130*s11cb1) >> 8 - if s11ru < 0 { - s11ru = 0 - } else if s11ru > 0xffff { - s11ru = 0xffff - } - if s11gu < 0 { - s11gu = 0 - } else if s11gu > 0xffff { - s11gu = 0xffff - } - if s11bu < 0 { - s11bu = 0 - } else if s11bu > 0xffff { - s11bu = 0xffff - } - - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (ablInterpolator) scale_RGBA_YCbCr440_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - s00j := ((sr.Min.Y+int(sy0))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s00yy1 := int(src.Y[s00i]) * 0x10101 - s00cb1 := int(src.Cb[s00j]) - 128 - s00cr1 := int(src.Cr[s00j]) - 128 - s00ru := (s00yy1 + 91881*s00cr1) >> 8 - s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8 - s00bu := (s00yy1 + 116130*s00cb1) >> 8 - if s00ru < 0 { - s00ru = 0 - } else if s00ru > 0xffff { - s00ru = 0xffff - } - if s00gu < 0 { - s00gu = 0 - } else if s00gu > 0xffff { - s00gu = 0xffff - } - if s00bu < 0 { - s00bu = 0 - } else if s00bu > 0xffff { - s00bu = 0xffff - } - - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - s10j := ((sr.Min.Y+int(sy0))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s10yy1 := int(src.Y[s10i]) * 0x10101 - s10cb1 := int(src.Cb[s10j]) - 128 - s10cr1 := int(src.Cr[s10j]) - 128 - s10ru := (s10yy1 + 91881*s10cr1) >> 8 - s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8 - s10bu := (s10yy1 + 116130*s10cb1) >> 8 - if s10ru < 0 { - s10ru = 0 - } else if s10ru > 0xffff { - s10ru = 0xffff - } - if s10gu < 0 { - s10gu = 0 - } else if s10gu > 0xffff { - s10gu = 0xffff - } - if s10bu < 0 { - s10bu = 0 - } else if s10bu > 0xffff { - s10bu = 0xffff - } - - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - s01j := ((sr.Min.Y+int(sy1))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx0) - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s01yy1 := int(src.Y[s01i]) * 0x10101 - s01cb1 := int(src.Cb[s01j]) - 128 - s01cr1 := int(src.Cr[s01j]) - 128 - s01ru := (s01yy1 + 91881*s01cr1) >> 8 - s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8 - s01bu := (s01yy1 + 116130*s01cb1) >> 8 - if s01ru < 0 { - s01ru = 0 - } else if s01ru > 0xffff { - s01ru = 0xffff - } - if s01gu < 0 { - s01gu = 0 - } else if s01gu > 0xffff { - s01gu = 0xffff - } - if s01bu < 0 { - s01bu = 0 - } else if s01bu > 0xffff { - s01bu = 0xffff - } - - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - s11j := ((sr.Min.Y+int(sy1))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx1) - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s11yy1 := int(src.Y[s11i]) * 0x10101 - s11cb1 := int(src.Cb[s11j]) - 128 - s11cr1 := int(src.Cr[s11j]) - 128 - s11ru := (s11yy1 + 91881*s11cr1) >> 8 - s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8 - s11bu := (s11yy1 + 116130*s11cb1) >> 8 - if s11ru < 0 { - s11ru = 0 - } else if s11ru > 0xffff { - s11ru = 0xffff - } - if s11gu < 0 { - s11gu = 0 - } else if s11gu > 0xffff { - s11gu = 0xffff - } - if s11bu < 0 { - s11bu = 0 - } else if s11bu > 0xffff { - s11bu = 0xffff - } - - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (ablInterpolator) scale_RGBA_Image_Over(dst *image.RGBA, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00ru, s00gu, s00bu, s00au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy0)).RGBA() - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10ru, s10gu, s10bu, s10au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy0)).RGBA() - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01ru, s01gu, s01bu, s01au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy1)).RGBA() - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11ru, s11gu, s11bu, s11au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy1)).RGBA() - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - pa1 := (0xffff - pa) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8) - } - } -} - -func (ablInterpolator) scale_RGBA_Image_Src(dst *image.RGBA, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00ru, s00gu, s00bu, s00au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy0)).RGBA() - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10ru, s10gu, s10bu, s10au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy0)).RGBA() - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01ru, s01gu, s01bu, s01au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy1)).RGBA() - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11ru, s11gu, s11bu, s11au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy1)).RGBA() - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = uint8(pa >> 8) - } - } -} - -func (ablInterpolator) scale_Image_Image_Over(dst Image, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - srcMask, smp := opts.SrcMask, opts.SrcMaskP - dstMask, dmp := opts.DstMask, opts.DstMaskP - dstColorRGBA64 := &color.RGBA64{} - dstColor := color.Color(dstColorRGBA64) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00ru, s00gu, s00bu, s00au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy0)).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx0), smp.Y+sr.Min.Y+int(sy0)).RGBA() - s00ru = s00ru * ma / 0xffff - s00gu = s00gu * ma / 0xffff - s00bu = s00bu * ma / 0xffff - s00au = s00au * ma / 0xffff - } - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10ru, s10gu, s10bu, s10au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy0)).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx1), smp.Y+sr.Min.Y+int(sy0)).RGBA() - s10ru = s10ru * ma / 0xffff - s10gu = s10gu * ma / 0xffff - s10bu = s10bu * ma / 0xffff - s10au = s10au * ma / 0xffff - } - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01ru, s01gu, s01bu, s01au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy1)).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx0), smp.Y+sr.Min.Y+int(sy1)).RGBA() - s01ru = s01ru * ma / 0xffff - s01gu = s01gu * ma / 0xffff - s01bu = s01bu * ma / 0xffff - s01au = s01au * ma / 0xffff - } - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11ru, s11gu, s11bu, s11au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy1)).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx1), smp.Y+sr.Min.Y+int(sy1)).RGBA() - s11ru = s11ru * ma / 0xffff - s11gu = s11gu * ma / 0xffff - s11bu = s11bu * ma / 0xffff - s11au = s11au * ma / 0xffff - } - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA() - if dstMask != nil { - _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA() - pr = pr * ma / 0xffff - pg = pg * ma / 0xffff - pb = pb * ma / 0xffff - pa = pa * ma / 0xffff - } - pa1 := 0xffff - pa - dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr) - dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg) - dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb) - dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } - } -} - -func (ablInterpolator) scale_Image_Image_Src(dst Image, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) { - sw := int32(sr.Dx()) - sh := int32(sr.Dy()) - yscale := float64(sh) / float64(dr.Dy()) - xscale := float64(sw) / float64(dr.Dx()) - swMinus1, shMinus1 := sw-1, sh-1 - srcMask, smp := opts.SrcMask, opts.SrcMaskP - dstMask, dmp := opts.DstMask, opts.DstMaskP - dstColorRGBA64 := &color.RGBA64{} - dstColor := color.Color(dstColorRGBA64) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - sy := (float64(dy)+0.5)*yscale - 0.5 - // If sy < 0, we will clamp sy0 to 0 anyway, so it doesn't matter if - // we say int32(sy) instead of int32(math.Floor(sy)). Similarly for - // sx, below. - sy0 := int32(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy1 := sy0 + 1 - if sy < 0 { - sy0, sy1 = 0, 0 - yFrac0, yFrac1 = 0, 1 - } else if sy1 > shMinus1 { - sy0, sy1 = shMinus1, shMinus1 - yFrac0, yFrac1 = 1, 0 - } - - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - sx := (float64(dx)+0.5)*xscale - 0.5 - sx0 := int32(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx1 := sx0 + 1 - if sx < 0 { - sx0, sx1 = 0, 0 - xFrac0, xFrac1 = 0, 1 - } else if sx1 > swMinus1 { - sx0, sx1 = swMinus1, swMinus1 - xFrac0, xFrac1 = 1, 0 - } - - s00ru, s00gu, s00bu, s00au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy0)).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx0), smp.Y+sr.Min.Y+int(sy0)).RGBA() - s00ru = s00ru * ma / 0xffff - s00gu = s00gu * ma / 0xffff - s00bu = s00bu * ma / 0xffff - s00au = s00au * ma / 0xffff - } - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10ru, s10gu, s10bu, s10au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy0)).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx1), smp.Y+sr.Min.Y+int(sy0)).RGBA() - s10ru = s10ru * ma / 0xffff - s10gu = s10gu * ma / 0xffff - s10bu = s10bu * ma / 0xffff - s10au = s10au * ma / 0xffff - } - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01ru, s01gu, s01bu, s01au := src.At(sr.Min.X+int(sx0), sr.Min.Y+int(sy1)).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx0), smp.Y+sr.Min.Y+int(sy1)).RGBA() - s01ru = s01ru * ma / 0xffff - s01gu = s01gu * ma / 0xffff - s01bu = s01bu * ma / 0xffff - s01au = s01au * ma / 0xffff - } - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11ru, s11gu, s11bu, s11au := src.At(sr.Min.X+int(sx1), sr.Min.Y+int(sy1)).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(sx1), smp.Y+sr.Min.Y+int(sy1)).RGBA() - s11ru = s11ru * ma / 0xffff - s11gu = s11gu * ma / 0xffff - s11bu = s11bu * ma / 0xffff - s11au = s11au * ma / 0xffff - } - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - if dstMask != nil { - qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA() - _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA() - pr = pr * ma / 0xffff - pg = pg * ma / 0xffff - pb = pb * ma / 0xffff - pa = pa * ma / 0xffff - pa1 := 0xffff - ma - dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr) - dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg) - dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb) - dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } else { - dstColorRGBA64.R = uint16(pr) - dstColorRGBA64.G = uint16(pg) - dstColorRGBA64.B = uint16(pb) - dstColorRGBA64.A = uint16(pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } - } - } -} - -func (ablInterpolator) transform_RGBA_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.Gray, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00i := (sy0-src.Rect.Min.Y)*src.Stride + (sx0 - src.Rect.Min.X) - s00ru := uint32(src.Pix[s00i]) * 0x101 - s00r := float64(s00ru) - s10i := (sy0-src.Rect.Min.Y)*src.Stride + (sx1 - src.Rect.Min.X) - s10ru := uint32(src.Pix[s10i]) * 0x101 - s10r := float64(s10ru) - s10r = xFrac1*s00r + xFrac0*s10r - s01i := (sy1-src.Rect.Min.Y)*src.Stride + (sx0 - src.Rect.Min.X) - s01ru := uint32(src.Pix[s01i]) * 0x101 - s01r := float64(s01ru) - s11i := (sy1-src.Rect.Min.Y)*src.Stride + (sx1 - src.Rect.Min.X) - s11ru := uint32(src.Pix[s11i]) * 0x101 - s11r := float64(s11ru) - s11r = xFrac1*s01r + xFrac0*s11r - s11r = yFrac1*s10r + yFrac0*s11r - pr := uint32(s11r) - out := uint8(pr >> 8) - dst.Pix[d+0] = out - dst.Pix[d+1] = out - dst.Pix[d+2] = out - dst.Pix[d+3] = 0xff - } - } -} - -func (ablInterpolator) transform_RGBA_NRGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00i := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4 - s00au := uint32(src.Pix[s00i+3]) * 0x101 - s00ru := uint32(src.Pix[s00i+0]) * s00au / 0xff - s00gu := uint32(src.Pix[s00i+1]) * s00au / 0xff - s00bu := uint32(src.Pix[s00i+2]) * s00au / 0xff - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10i := (sy0-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4 - s10au := uint32(src.Pix[s10i+3]) * 0x101 - s10ru := uint32(src.Pix[s10i+0]) * s10au / 0xff - s10gu := uint32(src.Pix[s10i+1]) * s10au / 0xff - s10bu := uint32(src.Pix[s10i+2]) * s10au / 0xff - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01i := (sy1-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4 - s01au := uint32(src.Pix[s01i+3]) * 0x101 - s01ru := uint32(src.Pix[s01i+0]) * s01au / 0xff - s01gu := uint32(src.Pix[s01i+1]) * s01au / 0xff - s01bu := uint32(src.Pix[s01i+2]) * s01au / 0xff - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11i := (sy1-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4 - s11au := uint32(src.Pix[s11i+3]) * 0x101 - s11ru := uint32(src.Pix[s11i+0]) * s11au / 0xff - s11gu := uint32(src.Pix[s11i+1]) * s11au / 0xff - s11bu := uint32(src.Pix[s11i+2]) * s11au / 0xff - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - pa1 := (0xffff - pa) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8) - } - } -} - -func (ablInterpolator) transform_RGBA_NRGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00i := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4 - s00au := uint32(src.Pix[s00i+3]) * 0x101 - s00ru := uint32(src.Pix[s00i+0]) * s00au / 0xff - s00gu := uint32(src.Pix[s00i+1]) * s00au / 0xff - s00bu := uint32(src.Pix[s00i+2]) * s00au / 0xff - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10i := (sy0-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4 - s10au := uint32(src.Pix[s10i+3]) * 0x101 - s10ru := uint32(src.Pix[s10i+0]) * s10au / 0xff - s10gu := uint32(src.Pix[s10i+1]) * s10au / 0xff - s10bu := uint32(src.Pix[s10i+2]) * s10au / 0xff - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01i := (sy1-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4 - s01au := uint32(src.Pix[s01i+3]) * 0x101 - s01ru := uint32(src.Pix[s01i+0]) * s01au / 0xff - s01gu := uint32(src.Pix[s01i+1]) * s01au / 0xff - s01bu := uint32(src.Pix[s01i+2]) * s01au / 0xff - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11i := (sy1-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4 - s11au := uint32(src.Pix[s11i+3]) * 0x101 - s11ru := uint32(src.Pix[s11i+0]) * s11au / 0xff - s11gu := uint32(src.Pix[s11i+1]) * s11au / 0xff - s11bu := uint32(src.Pix[s11i+2]) * s11au / 0xff - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = uint8(pa >> 8) - } - } -} - -func (ablInterpolator) transform_RGBA_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00i := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4 - s00ru := uint32(src.Pix[s00i+0]) * 0x101 - s00gu := uint32(src.Pix[s00i+1]) * 0x101 - s00bu := uint32(src.Pix[s00i+2]) * 0x101 - s00au := uint32(src.Pix[s00i+3]) * 0x101 - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10i := (sy0-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4 - s10ru := uint32(src.Pix[s10i+0]) * 0x101 - s10gu := uint32(src.Pix[s10i+1]) * 0x101 - s10bu := uint32(src.Pix[s10i+2]) * 0x101 - s10au := uint32(src.Pix[s10i+3]) * 0x101 - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01i := (sy1-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4 - s01ru := uint32(src.Pix[s01i+0]) * 0x101 - s01gu := uint32(src.Pix[s01i+1]) * 0x101 - s01bu := uint32(src.Pix[s01i+2]) * 0x101 - s01au := uint32(src.Pix[s01i+3]) * 0x101 - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11i := (sy1-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4 - s11ru := uint32(src.Pix[s11i+0]) * 0x101 - s11gu := uint32(src.Pix[s11i+1]) * 0x101 - s11bu := uint32(src.Pix[s11i+2]) * 0x101 - s11au := uint32(src.Pix[s11i+3]) * 0x101 - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - pa1 := (0xffff - pa) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8) - } - } -} - -func (ablInterpolator) transform_RGBA_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00i := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4 - s00ru := uint32(src.Pix[s00i+0]) * 0x101 - s00gu := uint32(src.Pix[s00i+1]) * 0x101 - s00bu := uint32(src.Pix[s00i+2]) * 0x101 - s00au := uint32(src.Pix[s00i+3]) * 0x101 - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10i := (sy0-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4 - s10ru := uint32(src.Pix[s10i+0]) * 0x101 - s10gu := uint32(src.Pix[s10i+1]) * 0x101 - s10bu := uint32(src.Pix[s10i+2]) * 0x101 - s10au := uint32(src.Pix[s10i+3]) * 0x101 - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01i := (sy1-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4 - s01ru := uint32(src.Pix[s01i+0]) * 0x101 - s01gu := uint32(src.Pix[s01i+1]) * 0x101 - s01bu := uint32(src.Pix[s01i+2]) * 0x101 - s01au := uint32(src.Pix[s01i+3]) * 0x101 - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11i := (sy1-src.Rect.Min.Y)*src.Stride + (sx1-src.Rect.Min.X)*4 - s11ru := uint32(src.Pix[s11i+0]) * 0x101 - s11gu := uint32(src.Pix[s11i+1]) * 0x101 - s11bu := uint32(src.Pix[s11i+2]) * 0x101 - s11au := uint32(src.Pix[s11i+3]) * 0x101 - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = uint8(pa >> 8) - } - } -} - -func (ablInterpolator) transform_RGBA_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00i := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X) - s00j := (sy0-src.Rect.Min.Y)*src.CStride + (sx0 - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s00yy1 := int(src.Y[s00i]) * 0x10101 - s00cb1 := int(src.Cb[s00j]) - 128 - s00cr1 := int(src.Cr[s00j]) - 128 - s00ru := (s00yy1 + 91881*s00cr1) >> 8 - s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8 - s00bu := (s00yy1 + 116130*s00cb1) >> 8 - if s00ru < 0 { - s00ru = 0 - } else if s00ru > 0xffff { - s00ru = 0xffff - } - if s00gu < 0 { - s00gu = 0 - } else if s00gu > 0xffff { - s00gu = 0xffff - } - if s00bu < 0 { - s00bu = 0 - } else if s00bu > 0xffff { - s00bu = 0xffff - } - - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s10i := (sy0-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X) - s10j := (sy0-src.Rect.Min.Y)*src.CStride + (sx1 - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s10yy1 := int(src.Y[s10i]) * 0x10101 - s10cb1 := int(src.Cb[s10j]) - 128 - s10cr1 := int(src.Cr[s10j]) - 128 - s10ru := (s10yy1 + 91881*s10cr1) >> 8 - s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8 - s10bu := (s10yy1 + 116130*s10cb1) >> 8 - if s10ru < 0 { - s10ru = 0 - } else if s10ru > 0xffff { - s10ru = 0xffff - } - if s10gu < 0 { - s10gu = 0 - } else if s10gu > 0xffff { - s10gu = 0xffff - } - if s10bu < 0 { - s10bu = 0 - } else if s10bu > 0xffff { - s10bu = 0xffff - } - - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s01i := (sy1-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X) - s01j := (sy1-src.Rect.Min.Y)*src.CStride + (sx0 - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s01yy1 := int(src.Y[s01i]) * 0x10101 - s01cb1 := int(src.Cb[s01j]) - 128 - s01cr1 := int(src.Cr[s01j]) - 128 - s01ru := (s01yy1 + 91881*s01cr1) >> 8 - s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8 - s01bu := (s01yy1 + 116130*s01cb1) >> 8 - if s01ru < 0 { - s01ru = 0 - } else if s01ru > 0xffff { - s01ru = 0xffff - } - if s01gu < 0 { - s01gu = 0 - } else if s01gu > 0xffff { - s01gu = 0xffff - } - if s01bu < 0 { - s01bu = 0 - } else if s01bu > 0xffff { - s01bu = 0xffff - } - - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s11i := (sy1-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X) - s11j := (sy1-src.Rect.Min.Y)*src.CStride + (sx1 - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s11yy1 := int(src.Y[s11i]) * 0x10101 - s11cb1 := int(src.Cb[s11j]) - 128 - s11cr1 := int(src.Cr[s11j]) - 128 - s11ru := (s11yy1 + 91881*s11cr1) >> 8 - s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8 - s11bu := (s11yy1 + 116130*s11cb1) >> 8 - if s11ru < 0 { - s11ru = 0 - } else if s11ru > 0xffff { - s11ru = 0xffff - } - if s11gu < 0 { - s11gu = 0 - } else if s11gu > 0xffff { - s11gu = 0xffff - } - if s11bu < 0 { - s11bu = 0 - } else if s11bu > 0xffff { - s11bu = 0xffff - } - - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (ablInterpolator) transform_RGBA_YCbCr422_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00i := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X) - s00j := (sy0-src.Rect.Min.Y)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s00yy1 := int(src.Y[s00i]) * 0x10101 - s00cb1 := int(src.Cb[s00j]) - 128 - s00cr1 := int(src.Cr[s00j]) - 128 - s00ru := (s00yy1 + 91881*s00cr1) >> 8 - s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8 - s00bu := (s00yy1 + 116130*s00cb1) >> 8 - if s00ru < 0 { - s00ru = 0 - } else if s00ru > 0xffff { - s00ru = 0xffff - } - if s00gu < 0 { - s00gu = 0 - } else if s00gu > 0xffff { - s00gu = 0xffff - } - if s00bu < 0 { - s00bu = 0 - } else if s00bu > 0xffff { - s00bu = 0xffff - } - - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s10i := (sy0-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X) - s10j := (sy0-src.Rect.Min.Y)*src.CStride + ((sx1)/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s10yy1 := int(src.Y[s10i]) * 0x10101 - s10cb1 := int(src.Cb[s10j]) - 128 - s10cr1 := int(src.Cr[s10j]) - 128 - s10ru := (s10yy1 + 91881*s10cr1) >> 8 - s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8 - s10bu := (s10yy1 + 116130*s10cb1) >> 8 - if s10ru < 0 { - s10ru = 0 - } else if s10ru > 0xffff { - s10ru = 0xffff - } - if s10gu < 0 { - s10gu = 0 - } else if s10gu > 0xffff { - s10gu = 0xffff - } - if s10bu < 0 { - s10bu = 0 - } else if s10bu > 0xffff { - s10bu = 0xffff - } - - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s01i := (sy1-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X) - s01j := (sy1-src.Rect.Min.Y)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s01yy1 := int(src.Y[s01i]) * 0x10101 - s01cb1 := int(src.Cb[s01j]) - 128 - s01cr1 := int(src.Cr[s01j]) - 128 - s01ru := (s01yy1 + 91881*s01cr1) >> 8 - s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8 - s01bu := (s01yy1 + 116130*s01cb1) >> 8 - if s01ru < 0 { - s01ru = 0 - } else if s01ru > 0xffff { - s01ru = 0xffff - } - if s01gu < 0 { - s01gu = 0 - } else if s01gu > 0xffff { - s01gu = 0xffff - } - if s01bu < 0 { - s01bu = 0 - } else if s01bu > 0xffff { - s01bu = 0xffff - } - - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s11i := (sy1-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X) - s11j := (sy1-src.Rect.Min.Y)*src.CStride + ((sx1)/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s11yy1 := int(src.Y[s11i]) * 0x10101 - s11cb1 := int(src.Cb[s11j]) - 128 - s11cr1 := int(src.Cr[s11j]) - 128 - s11ru := (s11yy1 + 91881*s11cr1) >> 8 - s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8 - s11bu := (s11yy1 + 116130*s11cb1) >> 8 - if s11ru < 0 { - s11ru = 0 - } else if s11ru > 0xffff { - s11ru = 0xffff - } - if s11gu < 0 { - s11gu = 0 - } else if s11gu > 0xffff { - s11gu = 0xffff - } - if s11bu < 0 { - s11bu = 0 - } else if s11bu > 0xffff { - s11bu = 0xffff - } - - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (ablInterpolator) transform_RGBA_YCbCr420_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00i := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X) - s00j := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s00yy1 := int(src.Y[s00i]) * 0x10101 - s00cb1 := int(src.Cb[s00j]) - 128 - s00cr1 := int(src.Cr[s00j]) - 128 - s00ru := (s00yy1 + 91881*s00cr1) >> 8 - s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8 - s00bu := (s00yy1 + 116130*s00cb1) >> 8 - if s00ru < 0 { - s00ru = 0 - } else if s00ru > 0xffff { - s00ru = 0xffff - } - if s00gu < 0 { - s00gu = 0 - } else if s00gu > 0xffff { - s00gu = 0xffff - } - if s00bu < 0 { - s00bu = 0 - } else if s00bu > 0xffff { - s00bu = 0xffff - } - - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s10i := (sy0-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X) - s10j := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + ((sx1)/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s10yy1 := int(src.Y[s10i]) * 0x10101 - s10cb1 := int(src.Cb[s10j]) - 128 - s10cr1 := int(src.Cr[s10j]) - 128 - s10ru := (s10yy1 + 91881*s10cr1) >> 8 - s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8 - s10bu := (s10yy1 + 116130*s10cb1) >> 8 - if s10ru < 0 { - s10ru = 0 - } else if s10ru > 0xffff { - s10ru = 0xffff - } - if s10gu < 0 { - s10gu = 0 - } else if s10gu > 0xffff { - s10gu = 0xffff - } - if s10bu < 0 { - s10bu = 0 - } else if s10bu > 0xffff { - s10bu = 0xffff - } - - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s01i := (sy1-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X) - s01j := ((sy1)/2-src.Rect.Min.Y/2)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s01yy1 := int(src.Y[s01i]) * 0x10101 - s01cb1 := int(src.Cb[s01j]) - 128 - s01cr1 := int(src.Cr[s01j]) - 128 - s01ru := (s01yy1 + 91881*s01cr1) >> 8 - s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8 - s01bu := (s01yy1 + 116130*s01cb1) >> 8 - if s01ru < 0 { - s01ru = 0 - } else if s01ru > 0xffff { - s01ru = 0xffff - } - if s01gu < 0 { - s01gu = 0 - } else if s01gu > 0xffff { - s01gu = 0xffff - } - if s01bu < 0 { - s01bu = 0 - } else if s01bu > 0xffff { - s01bu = 0xffff - } - - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s11i := (sy1-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X) - s11j := ((sy1)/2-src.Rect.Min.Y/2)*src.CStride + ((sx1)/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s11yy1 := int(src.Y[s11i]) * 0x10101 - s11cb1 := int(src.Cb[s11j]) - 128 - s11cr1 := int(src.Cr[s11j]) - 128 - s11ru := (s11yy1 + 91881*s11cr1) >> 8 - s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8 - s11bu := (s11yy1 + 116130*s11cb1) >> 8 - if s11ru < 0 { - s11ru = 0 - } else if s11ru > 0xffff { - s11ru = 0xffff - } - if s11gu < 0 { - s11gu = 0 - } else if s11gu > 0xffff { - s11gu = 0xffff - } - if s11bu < 0 { - s11bu = 0 - } else if s11bu > 0xffff { - s11bu = 0xffff - } - - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (ablInterpolator) transform_RGBA_YCbCr440_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00i := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X) - s00j := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + (sx0 - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s00yy1 := int(src.Y[s00i]) * 0x10101 - s00cb1 := int(src.Cb[s00j]) - 128 - s00cr1 := int(src.Cr[s00j]) - 128 - s00ru := (s00yy1 + 91881*s00cr1) >> 8 - s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8 - s00bu := (s00yy1 + 116130*s00cb1) >> 8 - if s00ru < 0 { - s00ru = 0 - } else if s00ru > 0xffff { - s00ru = 0xffff - } - if s00gu < 0 { - s00gu = 0 - } else if s00gu > 0xffff { - s00gu = 0xffff - } - if s00bu < 0 { - s00bu = 0 - } else if s00bu > 0xffff { - s00bu = 0xffff - } - - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s10i := (sy0-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X) - s10j := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + (sx1 - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s10yy1 := int(src.Y[s10i]) * 0x10101 - s10cb1 := int(src.Cb[s10j]) - 128 - s10cr1 := int(src.Cr[s10j]) - 128 - s10ru := (s10yy1 + 91881*s10cr1) >> 8 - s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8 - s10bu := (s10yy1 + 116130*s10cb1) >> 8 - if s10ru < 0 { - s10ru = 0 - } else if s10ru > 0xffff { - s10ru = 0xffff - } - if s10gu < 0 { - s10gu = 0 - } else if s10gu > 0xffff { - s10gu = 0xffff - } - if s10bu < 0 { - s10bu = 0 - } else if s10bu > 0xffff { - s10bu = 0xffff - } - - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s01i := (sy1-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X) - s01j := ((sy1)/2-src.Rect.Min.Y/2)*src.CStride + (sx0 - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s01yy1 := int(src.Y[s01i]) * 0x10101 - s01cb1 := int(src.Cb[s01j]) - 128 - s01cr1 := int(src.Cr[s01j]) - 128 - s01ru := (s01yy1 + 91881*s01cr1) >> 8 - s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8 - s01bu := (s01yy1 + 116130*s01cb1) >> 8 - if s01ru < 0 { - s01ru = 0 - } else if s01ru > 0xffff { - s01ru = 0xffff - } - if s01gu < 0 { - s01gu = 0 - } else if s01gu > 0xffff { - s01gu = 0xffff - } - if s01bu < 0 { - s01bu = 0 - } else if s01bu > 0xffff { - s01bu = 0xffff - } - - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s11i := (sy1-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X) - s11j := ((sy1)/2-src.Rect.Min.Y/2)*src.CStride + (sx1 - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - s11yy1 := int(src.Y[s11i]) * 0x10101 - s11cb1 := int(src.Cb[s11j]) - 128 - s11cr1 := int(src.Cr[s11j]) - 128 - s11ru := (s11yy1 + 91881*s11cr1) >> 8 - s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8 - s11bu := (s11yy1 + 116130*s11cb1) >> 8 - if s11ru < 0 { - s11ru = 0 - } else if s11ru > 0xffff { - s11ru = 0xffff - } - if s11gu < 0 { - s11gu = 0 - } else if s11gu > 0xffff { - s11gu = 0xffff - } - if s11bu < 0 { - s11bu = 0 - } else if s11bu > 0xffff { - s11bu = 0xffff - } - - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (ablInterpolator) transform_RGBA_Image_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00ru, s00gu, s00bu, s00au := src.At(sx0, sy0).RGBA() - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10ru, s10gu, s10bu, s10au := src.At(sx1, sy0).RGBA() - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01ru, s01gu, s01bu, s01au := src.At(sx0, sy1).RGBA() - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11ru, s11gu, s11bu, s11au := src.At(sx1, sy1).RGBA() - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - pa1 := (0xffff - pa) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8) - } - } -} - -func (ablInterpolator) transform_RGBA_Image_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) { - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00ru, s00gu, s00bu, s00au := src.At(sx0, sy0).RGBA() - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10ru, s10gu, s10bu, s10au := src.At(sx1, sy0).RGBA() - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01ru, s01gu, s01bu, s01au := src.At(sx0, sy1).RGBA() - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11ru, s11gu, s11bu, s11au := src.At(sx1, sy1).RGBA() - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - dst.Pix[d+0] = uint8(pr >> 8) - dst.Pix[d+1] = uint8(pg >> 8) - dst.Pix[d+2] = uint8(pb >> 8) - dst.Pix[d+3] = uint8(pa >> 8) - } - } -} - -func (ablInterpolator) transform_Image_Image_Over(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) { - srcMask, smp := opts.SrcMask, opts.SrcMaskP - dstMask, dmp := opts.DstMask, opts.DstMaskP - dstColorRGBA64 := &color.RGBA64{} - dstColor := color.Color(dstColorRGBA64) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00ru, s00gu, s00bu, s00au := src.At(sx0, sy0).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sx0, smp.Y+sy0).RGBA() - s00ru = s00ru * ma / 0xffff - s00gu = s00gu * ma / 0xffff - s00bu = s00bu * ma / 0xffff - s00au = s00au * ma / 0xffff - } - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10ru, s10gu, s10bu, s10au := src.At(sx1, sy0).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sx1, smp.Y+sy0).RGBA() - s10ru = s10ru * ma / 0xffff - s10gu = s10gu * ma / 0xffff - s10bu = s10bu * ma / 0xffff - s10au = s10au * ma / 0xffff - } - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01ru, s01gu, s01bu, s01au := src.At(sx0, sy1).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sx0, smp.Y+sy1).RGBA() - s01ru = s01ru * ma / 0xffff - s01gu = s01gu * ma / 0xffff - s01bu = s01bu * ma / 0xffff - s01au = s01au * ma / 0xffff - } - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11ru, s11gu, s11bu, s11au := src.At(sx1, sy1).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sx1, smp.Y+sy1).RGBA() - s11ru = s11ru * ma / 0xffff - s11gu = s11gu * ma / 0xffff - s11bu = s11bu * ma / 0xffff - s11au = s11au * ma / 0xffff - } - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA() - if dstMask != nil { - _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA() - pr = pr * ma / 0xffff - pg = pg * ma / 0xffff - pb = pb * ma / 0xffff - pa = pa * ma / 0xffff - } - pa1 := 0xffff - pa - dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr) - dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg) - dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb) - dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } - } -} - -func (ablInterpolator) transform_Image_Image_Src(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) { - srcMask, smp := opts.SrcMask, opts.SrcMaskP - dstMask, dmp := opts.DstMask, opts.DstMaskP - dstColorRGBA64 := &color.RGBA64{} - dstColor := color.Color(dstColorRGBA64) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - sx -= 0.5 - sx0 := int(sx) - xFrac0 := sx - float64(sx0) - xFrac1 := 1 - xFrac0 - sx0 += bias.X - sx1 := sx0 + 1 - if sx0 < sr.Min.X { - sx0, sx1 = sr.Min.X, sr.Min.X - xFrac0, xFrac1 = 0, 1 - } else if sx1 >= sr.Max.X { - sx0, sx1 = sr.Max.X-1, sr.Max.X-1 - xFrac0, xFrac1 = 1, 0 - } - - sy -= 0.5 - sy0 := int(sy) - yFrac0 := sy - float64(sy0) - yFrac1 := 1 - yFrac0 - sy0 += bias.Y - sy1 := sy0 + 1 - if sy0 < sr.Min.Y { - sy0, sy1 = sr.Min.Y, sr.Min.Y - yFrac0, yFrac1 = 0, 1 - } else if sy1 >= sr.Max.Y { - sy0, sy1 = sr.Max.Y-1, sr.Max.Y-1 - yFrac0, yFrac1 = 1, 0 - } - - s00ru, s00gu, s00bu, s00au := src.At(sx0, sy0).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sx0, smp.Y+sy0).RGBA() - s00ru = s00ru * ma / 0xffff - s00gu = s00gu * ma / 0xffff - s00bu = s00bu * ma / 0xffff - s00au = s00au * ma / 0xffff - } - s00r := float64(s00ru) - s00g := float64(s00gu) - s00b := float64(s00bu) - s00a := float64(s00au) - s10ru, s10gu, s10bu, s10au := src.At(sx1, sy0).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sx1, smp.Y+sy0).RGBA() - s10ru = s10ru * ma / 0xffff - s10gu = s10gu * ma / 0xffff - s10bu = s10bu * ma / 0xffff - s10au = s10au * ma / 0xffff - } - s10r := float64(s10ru) - s10g := float64(s10gu) - s10b := float64(s10bu) - s10a := float64(s10au) - s10r = xFrac1*s00r + xFrac0*s10r - s10g = xFrac1*s00g + xFrac0*s10g - s10b = xFrac1*s00b + xFrac0*s10b - s10a = xFrac1*s00a + xFrac0*s10a - s01ru, s01gu, s01bu, s01au := src.At(sx0, sy1).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sx0, smp.Y+sy1).RGBA() - s01ru = s01ru * ma / 0xffff - s01gu = s01gu * ma / 0xffff - s01bu = s01bu * ma / 0xffff - s01au = s01au * ma / 0xffff - } - s01r := float64(s01ru) - s01g := float64(s01gu) - s01b := float64(s01bu) - s01a := float64(s01au) - s11ru, s11gu, s11bu, s11au := src.At(sx1, sy1).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sx1, smp.Y+sy1).RGBA() - s11ru = s11ru * ma / 0xffff - s11gu = s11gu * ma / 0xffff - s11bu = s11bu * ma / 0xffff - s11au = s11au * ma / 0xffff - } - s11r := float64(s11ru) - s11g := float64(s11gu) - s11b := float64(s11bu) - s11a := float64(s11au) - s11r = xFrac1*s01r + xFrac0*s11r - s11g = xFrac1*s01g + xFrac0*s11g - s11b = xFrac1*s01b + xFrac0*s11b - s11a = xFrac1*s01a + xFrac0*s11a - s11r = yFrac1*s10r + yFrac0*s11r - s11g = yFrac1*s10g + yFrac0*s11g - s11b = yFrac1*s10b + yFrac0*s11b - s11a = yFrac1*s10a + yFrac0*s11a - pr := uint32(s11r) - pg := uint32(s11g) - pb := uint32(s11b) - pa := uint32(s11a) - if dstMask != nil { - qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA() - _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA() - pr = pr * ma / 0xffff - pg = pg * ma / 0xffff - pb = pb * ma / 0xffff - pa = pa * ma / 0xffff - pa1 := 0xffff - ma - dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr) - dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg) - dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb) - dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } else { - dstColorRGBA64.R = uint16(pr) - dstColorRGBA64.G = uint16(pg) - dstColorRGBA64.B = uint16(pb) - dstColorRGBA64.A = uint16(pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } - } - } -} - -func (z *kernelScaler) Scale(dst Image, dr image.Rectangle, src image.Image, sr image.Rectangle, op Op, opts *Options) { - if z.dw != int32(dr.Dx()) || z.dh != int32(dr.Dy()) || z.sw != int32(sr.Dx()) || z.sh != int32(sr.Dy()) { - z.kernel.Scale(dst, dr, src, sr, op, opts) - return - } - - var o Options - if opts != nil { - o = *opts - } - - // adr is the affected destination pixels. - adr := dst.Bounds().Intersect(dr) - adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP) - if adr.Empty() || sr.Empty() { - return - } - // Make adr relative to dr.Min. - adr = adr.Sub(dr.Min) - if op == Over && o.SrcMask == nil && opaque(src) { - op = Src - } - - if _, ok := src.(*image.Uniform); ok && o.DstMask == nil && o.SrcMask == nil && sr.In(src.Bounds()) { - Draw(dst, dr, src, src.Bounds().Min, op) - return - } - - // Create a temporary buffer: - // scaleX distributes the source image's columns over the temporary image. - // scaleY distributes the temporary image's rows over the destination image. - var tmp [][4]float64 - if z.pool.New != nil { - tmpp := z.pool.Get().(*[][4]float64) - defer z.pool.Put(tmpp) - tmp = *tmpp - } else { - tmp = z.makeTmpBuf() - } - - // sr is the source pixels. If it extends beyond the src bounds, - // we cannot use the type-specific fast paths, as they access - // the Pix fields directly without bounds checking. - // - // Similarly, the fast paths assume that the masks are nil. - if o.SrcMask != nil || !sr.In(src.Bounds()) { - z.scaleX_Image(tmp, src, sr, &o) - } else { - switch src := src.(type) { - case *image.Gray: - z.scaleX_Gray(tmp, src, sr, &o) - case *image.NRGBA: - z.scaleX_NRGBA(tmp, src, sr, &o) - case *image.RGBA: - z.scaleX_RGBA(tmp, src, sr, &o) - case *image.YCbCr: - switch src.SubsampleRatio { - default: - z.scaleX_Image(tmp, src, sr, &o) - case image.YCbCrSubsampleRatio444: - z.scaleX_YCbCr444(tmp, src, sr, &o) - case image.YCbCrSubsampleRatio422: - z.scaleX_YCbCr422(tmp, src, sr, &o) - case image.YCbCrSubsampleRatio420: - z.scaleX_YCbCr420(tmp, src, sr, &o) - case image.YCbCrSubsampleRatio440: - z.scaleX_YCbCr440(tmp, src, sr, &o) - } - default: - z.scaleX_Image(tmp, src, sr, &o) - } - } - - if o.DstMask != nil { - switch op { - case Over: - z.scaleY_Image_Over(dst, dr, adr, tmp, &o) - case Src: - z.scaleY_Image_Src(dst, dr, adr, tmp, &o) - } - } else { - switch op { - case Over: - switch dst := dst.(type) { - case *image.RGBA: - z.scaleY_RGBA_Over(dst, dr, adr, tmp, &o) - default: - z.scaleY_Image_Over(dst, dr, adr, tmp, &o) - } - case Src: - switch dst := dst.(type) { - case *image.RGBA: - z.scaleY_RGBA_Src(dst, dr, adr, tmp, &o) - default: - z.scaleY_Image_Src(dst, dr, adr, tmp, &o) - } - } - } -} - -func (q *Kernel) Transform(dst Image, s2d f64.Aff3, src image.Image, sr image.Rectangle, op Op, opts *Options) { - var o Options - if opts != nil { - o = *opts - } - - dr := transformRect(&s2d, &sr) - // adr is the affected destination pixels. - adr := dst.Bounds().Intersect(dr) - adr, o.DstMask = clipAffectedDestRect(adr, o.DstMask, o.DstMaskP) - if adr.Empty() || sr.Empty() { - return - } - if op == Over && o.SrcMask == nil && opaque(src) { - op = Src - } - d2s := invert(&s2d) - // bias is a translation of the mapping from dst coordinates to src - // coordinates such that the latter temporarily have non-negative X - // and Y coordinates. This allows us to write int(f) instead of - // int(math.Floor(f)), since "round to zero" and "round down" are - // equivalent when f >= 0, but the former is much cheaper. The X-- - // and Y-- are because the TransformLeaf methods have a "sx -= 0.5" - // adjustment. - bias := transformRect(&d2s, &adr).Min - bias.X-- - bias.Y-- - d2s[2] -= float64(bias.X) - d2s[5] -= float64(bias.Y) - // Make adr relative to dr.Min. - adr = adr.Sub(dr.Min) - - if u, ok := src.(*image.Uniform); ok && o.DstMask != nil && o.SrcMask != nil && sr.In(src.Bounds()) { - transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op) - return - } - - xscale := abs(d2s[0]) - if s := abs(d2s[1]); xscale < s { - xscale = s - } - yscale := abs(d2s[3]) - if s := abs(d2s[4]); yscale < s { - yscale = s - } - - // sr is the source pixels. If it extends beyond the src bounds, - // we cannot use the type-specific fast paths, as they access - // the Pix fields directly without bounds checking. - // - // Similarly, the fast paths assume that the masks are nil. - if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) { - switch op { - case Over: - q.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - case Src: - q.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - } - } else { - switch op { - case Over: - switch dst := dst.(type) { - case *image.RGBA: - switch src := src.(type) { - case *image.NRGBA: - q.transform_RGBA_NRGBA_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - case *image.RGBA: - q.transform_RGBA_RGBA_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - default: - q.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - } - default: - switch src := src.(type) { - default: - q.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - } - } - case Src: - switch dst := dst.(type) { - case *image.RGBA: - switch src := src.(type) { - case *image.Gray: - q.transform_RGBA_Gray_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - case *image.NRGBA: - q.transform_RGBA_NRGBA_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - case *image.RGBA: - q.transform_RGBA_RGBA_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - case *image.YCbCr: - switch src.SubsampleRatio { - default: - q.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - case image.YCbCrSubsampleRatio444: - q.transform_RGBA_YCbCr444_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - case image.YCbCrSubsampleRatio422: - q.transform_RGBA_YCbCr422_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - case image.YCbCrSubsampleRatio420: - q.transform_RGBA_YCbCr420_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - case image.YCbCrSubsampleRatio440: - q.transform_RGBA_YCbCr440_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - } - default: - q.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - } - default: - switch src := src.(type) { - default: - q.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale, &o) - } - } - } - } -} - -func (z *kernelScaler) scaleX_Gray(tmp [][4]float64, src *image.Gray, sr image.Rectangle, opts *Options) { - t := 0 - for y := int32(0); y < z.sh; y++ { - for _, s := range z.horizontal.sources { - var pr float64 - for _, c := range z.horizontal.contribs[s.i:s.j] { - pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(c.coord) - src.Rect.Min.X) - pru := uint32(src.Pix[pi]) * 0x101 - pr += float64(pru) * c.weight - } - pr *= s.invTotalWeightFFFF - tmp[t] = [4]float64{ - pr, - pr, - pr, - 1, - } - t++ - } - } -} - -func (z *kernelScaler) scaleX_NRGBA(tmp [][4]float64, src *image.NRGBA, sr image.Rectangle, opts *Options) { - t := 0 - for y := int32(0); y < z.sh; y++ { - for _, s := range z.horizontal.sources { - var pr, pg, pb, pa float64 - for _, c := range z.horizontal.contribs[s.i:s.j] { - pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(c.coord)-src.Rect.Min.X)*4 - pau := uint32(src.Pix[pi+3]) * 0x101 - pru := uint32(src.Pix[pi+0]) * pau / 0xff - pgu := uint32(src.Pix[pi+1]) * pau / 0xff - pbu := uint32(src.Pix[pi+2]) * pau / 0xff - pr += float64(pru) * c.weight - pg += float64(pgu) * c.weight - pb += float64(pbu) * c.weight - pa += float64(pau) * c.weight - } - tmp[t] = [4]float64{ - pr * s.invTotalWeightFFFF, - pg * s.invTotalWeightFFFF, - pb * s.invTotalWeightFFFF, - pa * s.invTotalWeightFFFF, - } - t++ - } - } -} - -func (z *kernelScaler) scaleX_RGBA(tmp [][4]float64, src *image.RGBA, sr image.Rectangle, opts *Options) { - t := 0 - for y := int32(0); y < z.sh; y++ { - for _, s := range z.horizontal.sources { - var pr, pg, pb, pa float64 - for _, c := range z.horizontal.contribs[s.i:s.j] { - pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(c.coord)-src.Rect.Min.X)*4 - pru := uint32(src.Pix[pi+0]) * 0x101 - pgu := uint32(src.Pix[pi+1]) * 0x101 - pbu := uint32(src.Pix[pi+2]) * 0x101 - pau := uint32(src.Pix[pi+3]) * 0x101 - pr += float64(pru) * c.weight - pg += float64(pgu) * c.weight - pb += float64(pbu) * c.weight - pa += float64(pau) * c.weight - } - tmp[t] = [4]float64{ - pr * s.invTotalWeightFFFF, - pg * s.invTotalWeightFFFF, - pb * s.invTotalWeightFFFF, - pa * s.invTotalWeightFFFF, - } - t++ - } - } -} - -func (z *kernelScaler) scaleX_YCbCr444(tmp [][4]float64, src *image.YCbCr, sr image.Rectangle, opts *Options) { - t := 0 - for y := int32(0); y < z.sh; y++ { - for _, s := range z.horizontal.sources { - var pr, pg, pb float64 - for _, c := range z.horizontal.contribs[s.i:s.j] { - pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(c.coord) - src.Rect.Min.X) - pj := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(c.coord) - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pru := (pyy1 + 91881*pcr1) >> 8 - pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pbu := (pyy1 + 116130*pcb1) >> 8 - if pru < 0 { - pru = 0 - } else if pru > 0xffff { - pru = 0xffff - } - if pgu < 0 { - pgu = 0 - } else if pgu > 0xffff { - pgu = 0xffff - } - if pbu < 0 { - pbu = 0 - } else if pbu > 0xffff { - pbu = 0xffff - } - - pr += float64(pru) * c.weight - pg += float64(pgu) * c.weight - pb += float64(pbu) * c.weight - } - tmp[t] = [4]float64{ - pr * s.invTotalWeightFFFF, - pg * s.invTotalWeightFFFF, - pb * s.invTotalWeightFFFF, - 1, - } - t++ - } - } -} - -func (z *kernelScaler) scaleX_YCbCr422(tmp [][4]float64, src *image.YCbCr, sr image.Rectangle, opts *Options) { - t := 0 - for y := int32(0); y < z.sh; y++ { - for _, s := range z.horizontal.sources { - var pr, pg, pb float64 - for _, c := range z.horizontal.contribs[s.i:s.j] { - pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(c.coord) - src.Rect.Min.X) - pj := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(c.coord))/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pru := (pyy1 + 91881*pcr1) >> 8 - pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pbu := (pyy1 + 116130*pcb1) >> 8 - if pru < 0 { - pru = 0 - } else if pru > 0xffff { - pru = 0xffff - } - if pgu < 0 { - pgu = 0 - } else if pgu > 0xffff { - pgu = 0xffff - } - if pbu < 0 { - pbu = 0 - } else if pbu > 0xffff { - pbu = 0xffff - } - - pr += float64(pru) * c.weight - pg += float64(pgu) * c.weight - pb += float64(pbu) * c.weight - } - tmp[t] = [4]float64{ - pr * s.invTotalWeightFFFF, - pg * s.invTotalWeightFFFF, - pb * s.invTotalWeightFFFF, - 1, - } - t++ - } - } -} - -func (z *kernelScaler) scaleX_YCbCr420(tmp [][4]float64, src *image.YCbCr, sr image.Rectangle, opts *Options) { - t := 0 - for y := int32(0); y < z.sh; y++ { - for _, s := range z.horizontal.sources { - var pr, pg, pb float64 - for _, c := range z.horizontal.contribs[s.i:s.j] { - pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(c.coord) - src.Rect.Min.X) - pj := ((sr.Min.Y+int(y))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(c.coord))/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pru := (pyy1 + 91881*pcr1) >> 8 - pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pbu := (pyy1 + 116130*pcb1) >> 8 - if pru < 0 { - pru = 0 - } else if pru > 0xffff { - pru = 0xffff - } - if pgu < 0 { - pgu = 0 - } else if pgu > 0xffff { - pgu = 0xffff - } - if pbu < 0 { - pbu = 0 - } else if pbu > 0xffff { - pbu = 0xffff - } - - pr += float64(pru) * c.weight - pg += float64(pgu) * c.weight - pb += float64(pbu) * c.weight - } - tmp[t] = [4]float64{ - pr * s.invTotalWeightFFFF, - pg * s.invTotalWeightFFFF, - pb * s.invTotalWeightFFFF, - 1, - } - t++ - } - } -} - -func (z *kernelScaler) scaleX_YCbCr440(tmp [][4]float64, src *image.YCbCr, sr image.Rectangle, opts *Options) { - t := 0 - for y := int32(0); y < z.sh; y++ { - for _, s := range z.horizontal.sources { - var pr, pg, pb float64 - for _, c := range z.horizontal.contribs[s.i:s.j] { - pi := (sr.Min.Y+int(y)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(c.coord) - src.Rect.Min.X) - pj := ((sr.Min.Y+int(y))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(c.coord) - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pru := (pyy1 + 91881*pcr1) >> 8 - pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pbu := (pyy1 + 116130*pcb1) >> 8 - if pru < 0 { - pru = 0 - } else if pru > 0xffff { - pru = 0xffff - } - if pgu < 0 { - pgu = 0 - } else if pgu > 0xffff { - pgu = 0xffff - } - if pbu < 0 { - pbu = 0 - } else if pbu > 0xffff { - pbu = 0xffff - } - - pr += float64(pru) * c.weight - pg += float64(pgu) * c.weight - pb += float64(pbu) * c.weight - } - tmp[t] = [4]float64{ - pr * s.invTotalWeightFFFF, - pg * s.invTotalWeightFFFF, - pb * s.invTotalWeightFFFF, - 1, - } - t++ - } - } -} - -func (z *kernelScaler) scaleX_Image(tmp [][4]float64, src image.Image, sr image.Rectangle, opts *Options) { - t := 0 - srcMask, smp := opts.SrcMask, opts.SrcMaskP - for y := int32(0); y < z.sh; y++ { - for _, s := range z.horizontal.sources { - var pr, pg, pb, pa float64 - for _, c := range z.horizontal.contribs[s.i:s.j] { - pru, pgu, pbu, pau := src.At(sr.Min.X+int(c.coord), sr.Min.Y+int(y)).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+sr.Min.X+int(c.coord), smp.Y+sr.Min.Y+int(y)).RGBA() - pru = pru * ma / 0xffff - pgu = pgu * ma / 0xffff - pbu = pbu * ma / 0xffff - pau = pau * ma / 0xffff - } - pr += float64(pru) * c.weight - pg += float64(pgu) * c.weight - pb += float64(pbu) * c.weight - pa += float64(pau) * c.weight - } - tmp[t] = [4]float64{ - pr * s.invTotalWeightFFFF, - pg * s.invTotalWeightFFFF, - pb * s.invTotalWeightFFFF, - pa * s.invTotalWeightFFFF, - } - t++ - } - } -} - -func (z *kernelScaler) scaleY_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, tmp [][4]float64, opts *Options) { - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - d := (dr.Min.Y+adr.Min.Y-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+int(dx)-dst.Rect.Min.X)*4 - for _, s := range z.vertical.sources[adr.Min.Y:adr.Max.Y] { - var pr, pg, pb, pa float64 - for _, c := range z.vertical.contribs[s.i:s.j] { - p := &tmp[c.coord*z.dw+dx] - pr += p[0] * c.weight - pg += p[1] * c.weight - pb += p[2] * c.weight - pa += p[3] * c.weight - } - - if pr > pa { - pr = pa - } - if pg > pa { - pg = pa - } - if pb > pa { - pb = pa - } - - pr0 := uint32(ftou(pr * s.invTotalWeight)) - pg0 := uint32(ftou(pg * s.invTotalWeight)) - pb0 := uint32(ftou(pb * s.invTotalWeight)) - pa0 := uint32(ftou(pa * s.invTotalWeight)) - pa1 := (0xffff - uint32(pa0)) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr0) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg0) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb0) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa0) >> 8) - d += dst.Stride - } - } -} - -func (z *kernelScaler) scaleY_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, tmp [][4]float64, opts *Options) { - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - d := (dr.Min.Y+adr.Min.Y-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+int(dx)-dst.Rect.Min.X)*4 - for _, s := range z.vertical.sources[adr.Min.Y:adr.Max.Y] { - var pr, pg, pb, pa float64 - for _, c := range z.vertical.contribs[s.i:s.j] { - p := &tmp[c.coord*z.dw+dx] - pr += p[0] * c.weight - pg += p[1] * c.weight - pb += p[2] * c.weight - pa += p[3] * c.weight - } - - if pr > pa { - pr = pa - } - if pg > pa { - pg = pa - } - if pb > pa { - pb = pa - } - - dst.Pix[d+0] = uint8(ftou(pr*s.invTotalWeight) >> 8) - dst.Pix[d+1] = uint8(ftou(pg*s.invTotalWeight) >> 8) - dst.Pix[d+2] = uint8(ftou(pb*s.invTotalWeight) >> 8) - dst.Pix[d+3] = uint8(ftou(pa*s.invTotalWeight) >> 8) - d += dst.Stride - } - } -} - -func (z *kernelScaler) scaleY_Image_Over(dst Image, dr, adr image.Rectangle, tmp [][4]float64, opts *Options) { - dstMask, dmp := opts.DstMask, opts.DstMaskP - dstColorRGBA64 := &color.RGBA64{} - dstColor := color.Color(dstColorRGBA64) - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - for dy, s := range z.vertical.sources[adr.Min.Y:adr.Max.Y] { - var pr, pg, pb, pa float64 - for _, c := range z.vertical.contribs[s.i:s.j] { - p := &tmp[c.coord*z.dw+dx] - pr += p[0] * c.weight - pg += p[1] * c.weight - pb += p[2] * c.weight - pa += p[3] * c.weight - } - - if pr > pa { - pr = pa - } - if pg > pa { - pg = pa - } - if pb > pa { - pb = pa - } - - qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(adr.Min.Y+dy)).RGBA() - pr0 := uint32(ftou(pr * s.invTotalWeight)) - pg0 := uint32(ftou(pg * s.invTotalWeight)) - pb0 := uint32(ftou(pb * s.invTotalWeight)) - pa0 := uint32(ftou(pa * s.invTotalWeight)) - if dstMask != nil { - _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(adr.Min.Y+dy)).RGBA() - pr0 = pr0 * ma / 0xffff - pg0 = pg0 * ma / 0xffff - pb0 = pb0 * ma / 0xffff - pa0 = pa0 * ma / 0xffff - } - pa1 := 0xffff - pa0 - dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr0) - dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg0) - dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb0) - dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa0) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(adr.Min.Y+dy), dstColor) - } - } -} - -func (z *kernelScaler) scaleY_Image_Src(dst Image, dr, adr image.Rectangle, tmp [][4]float64, opts *Options) { - dstMask, dmp := opts.DstMask, opts.DstMaskP - dstColorRGBA64 := &color.RGBA64{} - dstColor := color.Color(dstColorRGBA64) - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - for dy, s := range z.vertical.sources[adr.Min.Y:adr.Max.Y] { - var pr, pg, pb, pa float64 - for _, c := range z.vertical.contribs[s.i:s.j] { - p := &tmp[c.coord*z.dw+dx] - pr += p[0] * c.weight - pg += p[1] * c.weight - pb += p[2] * c.weight - pa += p[3] * c.weight - } - - if pr > pa { - pr = pa - } - if pg > pa { - pg = pa - } - if pb > pa { - pb = pa - } - - if dstMask != nil { - qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(adr.Min.Y+dy)).RGBA() - _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(adr.Min.Y+dy)).RGBA() - pr := uint32(ftou(pr*s.invTotalWeight)) * ma / 0xffff - pg := uint32(ftou(pg*s.invTotalWeight)) * ma / 0xffff - pb := uint32(ftou(pb*s.invTotalWeight)) * ma / 0xffff - pa := uint32(ftou(pa*s.invTotalWeight)) * ma / 0xffff - pa1 := 0xffff - ma - dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr) - dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg) - dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb) - dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(adr.Min.Y+dy), dstColor) - } else { - dstColorRGBA64.R = ftou(pr * s.invTotalWeight) - dstColorRGBA64.G = ftou(pg * s.invTotalWeight) - dstColorRGBA64.B = ftou(pb * s.invTotalWeight) - dstColorRGBA64.A = ftou(pa * s.invTotalWeight) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(adr.Min.Y+dy), dstColor) - } - } - } -} - -func (q *Kernel) transform_RGBA_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.Gray, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pi := (ky-src.Rect.Min.Y)*src.Stride + (kx - src.Rect.Min.X) - pru := uint32(src.Pix[pi]) * 0x101 - pr += float64(pru) * w - } - } - } - } - out := uint8(fffftou(pr) >> 8) - dst.Pix[d+0] = out - dst.Pix[d+1] = out - dst.Pix[d+2] = out - dst.Pix[d+3] = 0xff - } - } -} - -func (q *Kernel) transform_RGBA_NRGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr, pg, pb, pa float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pi := (ky-src.Rect.Min.Y)*src.Stride + (kx-src.Rect.Min.X)*4 - pau := uint32(src.Pix[pi+3]) * 0x101 - pru := uint32(src.Pix[pi+0]) * pau / 0xff - pgu := uint32(src.Pix[pi+1]) * pau / 0xff - pbu := uint32(src.Pix[pi+2]) * pau / 0xff - pr += float64(pru) * w - pg += float64(pgu) * w - pb += float64(pbu) * w - pa += float64(pau) * w - } - } - } - } - - if pr > pa { - pr = pa - } - if pg > pa { - pg = pa - } - if pb > pa { - pb = pa - } - - pr0 := uint32(fffftou(pr)) - pg0 := uint32(fffftou(pg)) - pb0 := uint32(fffftou(pb)) - pa0 := uint32(fffftou(pa)) - pa1 := (0xffff - uint32(pa0)) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr0) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg0) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb0) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa0) >> 8) - } - } -} - -func (q *Kernel) transform_RGBA_NRGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr, pg, pb, pa float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pi := (ky-src.Rect.Min.Y)*src.Stride + (kx-src.Rect.Min.X)*4 - pau := uint32(src.Pix[pi+3]) * 0x101 - pru := uint32(src.Pix[pi+0]) * pau / 0xff - pgu := uint32(src.Pix[pi+1]) * pau / 0xff - pbu := uint32(src.Pix[pi+2]) * pau / 0xff - pr += float64(pru) * w - pg += float64(pgu) * w - pb += float64(pbu) * w - pa += float64(pau) * w - } - } - } - } - - if pr > pa { - pr = pa - } - if pg > pa { - pg = pa - } - if pb > pa { - pb = pa - } - - dst.Pix[d+0] = uint8(fffftou(pr) >> 8) - dst.Pix[d+1] = uint8(fffftou(pg) >> 8) - dst.Pix[d+2] = uint8(fffftou(pb) >> 8) - dst.Pix[d+3] = uint8(fffftou(pa) >> 8) - } - } -} - -func (q *Kernel) transform_RGBA_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr, pg, pb, pa float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pi := (ky-src.Rect.Min.Y)*src.Stride + (kx-src.Rect.Min.X)*4 - pru := uint32(src.Pix[pi+0]) * 0x101 - pgu := uint32(src.Pix[pi+1]) * 0x101 - pbu := uint32(src.Pix[pi+2]) * 0x101 - pau := uint32(src.Pix[pi+3]) * 0x101 - pr += float64(pru) * w - pg += float64(pgu) * w - pb += float64(pbu) * w - pa += float64(pau) * w - } - } - } - } - - if pr > pa { - pr = pa - } - if pg > pa { - pg = pa - } - if pb > pa { - pb = pa - } - - pr0 := uint32(fffftou(pr)) - pg0 := uint32(fffftou(pg)) - pb0 := uint32(fffftou(pb)) - pa0 := uint32(fffftou(pa)) - pa1 := (0xffff - uint32(pa0)) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr0) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg0) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb0) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa0) >> 8) - } - } -} - -func (q *Kernel) transform_RGBA_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr, pg, pb, pa float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pi := (ky-src.Rect.Min.Y)*src.Stride + (kx-src.Rect.Min.X)*4 - pru := uint32(src.Pix[pi+0]) * 0x101 - pgu := uint32(src.Pix[pi+1]) * 0x101 - pbu := uint32(src.Pix[pi+2]) * 0x101 - pau := uint32(src.Pix[pi+3]) * 0x101 - pr += float64(pru) * w - pg += float64(pgu) * w - pb += float64(pbu) * w - pa += float64(pau) * w - } - } - } - } - - if pr > pa { - pr = pa - } - if pg > pa { - pg = pa - } - if pb > pa { - pb = pa - } - - dst.Pix[d+0] = uint8(fffftou(pr) >> 8) - dst.Pix[d+1] = uint8(fffftou(pg) >> 8) - dst.Pix[d+2] = uint8(fffftou(pb) >> 8) - dst.Pix[d+3] = uint8(fffftou(pa) >> 8) - } - } -} - -func (q *Kernel) transform_RGBA_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr, pg, pb float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pi := (ky-src.Rect.Min.Y)*src.YStride + (kx - src.Rect.Min.X) - pj := (ky-src.Rect.Min.Y)*src.CStride + (kx - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pru := (pyy1 + 91881*pcr1) >> 8 - pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pbu := (pyy1 + 116130*pcb1) >> 8 - if pru < 0 { - pru = 0 - } else if pru > 0xffff { - pru = 0xffff - } - if pgu < 0 { - pgu = 0 - } else if pgu > 0xffff { - pgu = 0xffff - } - if pbu < 0 { - pbu = 0 - } else if pbu > 0xffff { - pbu = 0xffff - } - - pr += float64(pru) * w - pg += float64(pgu) * w - pb += float64(pbu) * w - } - } - } - } - dst.Pix[d+0] = uint8(fffftou(pr) >> 8) - dst.Pix[d+1] = uint8(fffftou(pg) >> 8) - dst.Pix[d+2] = uint8(fffftou(pb) >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (q *Kernel) transform_RGBA_YCbCr422_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr, pg, pb float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pi := (ky-src.Rect.Min.Y)*src.YStride + (kx - src.Rect.Min.X) - pj := (ky-src.Rect.Min.Y)*src.CStride + ((kx)/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pru := (pyy1 + 91881*pcr1) >> 8 - pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pbu := (pyy1 + 116130*pcb1) >> 8 - if pru < 0 { - pru = 0 - } else if pru > 0xffff { - pru = 0xffff - } - if pgu < 0 { - pgu = 0 - } else if pgu > 0xffff { - pgu = 0xffff - } - if pbu < 0 { - pbu = 0 - } else if pbu > 0xffff { - pbu = 0xffff - } - - pr += float64(pru) * w - pg += float64(pgu) * w - pb += float64(pbu) * w - } - } - } - } - dst.Pix[d+0] = uint8(fffftou(pr) >> 8) - dst.Pix[d+1] = uint8(fffftou(pg) >> 8) - dst.Pix[d+2] = uint8(fffftou(pb) >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (q *Kernel) transform_RGBA_YCbCr420_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr, pg, pb float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pi := (ky-src.Rect.Min.Y)*src.YStride + (kx - src.Rect.Min.X) - pj := ((ky)/2-src.Rect.Min.Y/2)*src.CStride + ((kx)/2 - src.Rect.Min.X/2) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pru := (pyy1 + 91881*pcr1) >> 8 - pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pbu := (pyy1 + 116130*pcb1) >> 8 - if pru < 0 { - pru = 0 - } else if pru > 0xffff { - pru = 0xffff - } - if pgu < 0 { - pgu = 0 - } else if pgu > 0xffff { - pgu = 0xffff - } - if pbu < 0 { - pbu = 0 - } else if pbu > 0xffff { - pbu = 0xffff - } - - pr += float64(pru) * w - pg += float64(pgu) * w - pb += float64(pbu) * w - } - } - } - } - dst.Pix[d+0] = uint8(fffftou(pr) >> 8) - dst.Pix[d+1] = uint8(fffftou(pg) >> 8) - dst.Pix[d+2] = uint8(fffftou(pb) >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (q *Kernel) transform_RGBA_YCbCr440_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr, pg, pb float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pi := (ky-src.Rect.Min.Y)*src.YStride + (kx - src.Rect.Min.X) - pj := ((ky)/2-src.Rect.Min.Y/2)*src.CStride + (kx - src.Rect.Min.X) - - // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method. - pyy1 := int(src.Y[pi]) * 0x10101 - pcb1 := int(src.Cb[pj]) - 128 - pcr1 := int(src.Cr[pj]) - 128 - pru := (pyy1 + 91881*pcr1) >> 8 - pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8 - pbu := (pyy1 + 116130*pcb1) >> 8 - if pru < 0 { - pru = 0 - } else if pru > 0xffff { - pru = 0xffff - } - if pgu < 0 { - pgu = 0 - } else if pgu > 0xffff { - pgu = 0xffff - } - if pbu < 0 { - pbu = 0 - } else if pbu > 0xffff { - pbu = 0xffff - } - - pr += float64(pru) * w - pg += float64(pgu) * w - pb += float64(pbu) * w - } - } - } - } - dst.Pix[d+0] = uint8(fffftou(pr) >> 8) - dst.Pix[d+1] = uint8(fffftou(pg) >> 8) - dst.Pix[d+2] = uint8(fffftou(pb) >> 8) - dst.Pix[d+3] = 0xff - } - } -} - -func (q *Kernel) transform_RGBA_Image_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr, pg, pb, pa float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pru, pgu, pbu, pau := src.At(kx, ky).RGBA() - pr += float64(pru) * w - pg += float64(pgu) * w - pb += float64(pbu) * w - pa += float64(pau) * w - } - } - } - } - - if pr > pa { - pr = pa - } - if pg > pa { - pg = pa - } - if pb > pa { - pb = pa - } - - pr0 := uint32(fffftou(pr)) - pg0 := uint32(fffftou(pg)) - pb0 := uint32(fffftou(pb)) - pa0 := uint32(fffftou(pa)) - pa1 := (0xffff - uint32(pa0)) * 0x101 - dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr0) >> 8) - dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg0) >> 8) - dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb0) >> 8) - dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa0) >> 8) - } - } -} - -func (q *Kernel) transform_RGBA_Image_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr, pg, pb, pa float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pru, pgu, pbu, pau := src.At(kx, ky).RGBA() - pr += float64(pru) * w - pg += float64(pgu) * w - pb += float64(pbu) * w - pa += float64(pau) * w - } - } - } - } - - if pr > pa { - pr = pa - } - if pg > pa { - pg = pa - } - if pb > pa { - pb = pa - } - - dst.Pix[d+0] = uint8(fffftou(pr) >> 8) - dst.Pix[d+1] = uint8(fffftou(pg) >> 8) - dst.Pix[d+2] = uint8(fffftou(pb) >> 8) - dst.Pix[d+3] = uint8(fffftou(pa) >> 8) - } - } -} - -func (q *Kernel) transform_Image_Image_Over(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - srcMask, smp := opts.SrcMask, opts.SrcMaskP - dstMask, dmp := opts.DstMask, opts.DstMaskP - dstColorRGBA64 := &color.RGBA64{} - dstColor := color.Color(dstColorRGBA64) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr, pg, pb, pa float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pru, pgu, pbu, pau := src.At(kx, ky).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+kx, smp.Y+ky).RGBA() - pru = pru * ma / 0xffff - pgu = pgu * ma / 0xffff - pbu = pbu * ma / 0xffff - pau = pau * ma / 0xffff - } - pr += float64(pru) * w - pg += float64(pgu) * w - pb += float64(pbu) * w - pa += float64(pau) * w - } - } - } - } - - if pr > pa { - pr = pa - } - if pg > pa { - pg = pa - } - if pb > pa { - pb = pa - } - - qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA() - pr0 := uint32(fffftou(pr)) - pg0 := uint32(fffftou(pg)) - pb0 := uint32(fffftou(pb)) - pa0 := uint32(fffftou(pa)) - if dstMask != nil { - _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA() - pr0 = pr0 * ma / 0xffff - pg0 = pg0 * ma / 0xffff - pb0 = pb0 * ma / 0xffff - pa0 = pa0 * ma / 0xffff - } - pa1 := 0xffff - pa0 - dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr0) - dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg0) - dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb0) - dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa0) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } - } -} - -func (q *Kernel) transform_Image_Image_Src(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, xscale, yscale float64, opts *Options) { - // When shrinking, broaden the effective kernel support so that we still - // visit every source pixel. - xHalfWidth, xKernelArgScale := q.Support, 1.0 - if xscale > 1 { - xHalfWidth *= xscale - xKernelArgScale = 1 / xscale - } - yHalfWidth, yKernelArgScale := q.Support, 1.0 - if yscale > 1 { - yHalfWidth *= yscale - yKernelArgScale = 1 / yscale - } - - xWeights := make([]float64, 1+2*int(math.Ceil(xHalfWidth))) - yWeights := make([]float64, 1+2*int(math.Ceil(yHalfWidth))) - - srcMask, smp := opts.SrcMask, opts.SrcMaskP - dstMask, dmp := opts.DstMask, opts.DstMaskP - dstColorRGBA64 := &color.RGBA64{} - dstColor := color.Color(dstColorRGBA64) - for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ { - dyf := float64(dr.Min.Y+int(dy)) + 0.5 - for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx++ { - dxf := float64(dr.Min.X+int(dx)) + 0.5 - sx := d2s[0]*dxf + d2s[1]*dyf + d2s[2] - sy := d2s[3]*dxf + d2s[4]*dyf + d2s[5] - if !(image.Point{int(sx) + bias.X, int(sy) + bias.Y}).In(sr) { - continue - } - - // TODO: adjust the bias so that we can use int(f) instead - // of math.Floor(f) and math.Ceil(f). - sx += float64(bias.X) - sx -= 0.5 - ix := int(math.Floor(sx - xHalfWidth)) - if ix < sr.Min.X { - ix = sr.Min.X - } - jx := int(math.Ceil(sx + xHalfWidth)) - if jx > sr.Max.X { - jx = sr.Max.X - } - - totalXWeight := 0.0 - for kx := ix; kx < jx; kx++ { - xWeight := 0.0 - if t := abs((sx - float64(kx)) * xKernelArgScale); t < q.Support { - xWeight = q.At(t) - } - xWeights[kx-ix] = xWeight - totalXWeight += xWeight - } - for x := range xWeights[:jx-ix] { - xWeights[x] /= totalXWeight - } - - sy += float64(bias.Y) - sy -= 0.5 - iy := int(math.Floor(sy - yHalfWidth)) - if iy < sr.Min.Y { - iy = sr.Min.Y - } - jy := int(math.Ceil(sy + yHalfWidth)) - if jy > sr.Max.Y { - jy = sr.Max.Y - } - - totalYWeight := 0.0 - for ky := iy; ky < jy; ky++ { - yWeight := 0.0 - if t := abs((sy - float64(ky)) * yKernelArgScale); t < q.Support { - yWeight = q.At(t) - } - yWeights[ky-iy] = yWeight - totalYWeight += yWeight - } - for y := range yWeights[:jy-iy] { - yWeights[y] /= totalYWeight - } - - var pr, pg, pb, pa float64 - for ky := iy; ky < jy; ky++ { - if yWeight := yWeights[ky-iy]; yWeight != 0 { - for kx := ix; kx < jx; kx++ { - if w := xWeights[kx-ix] * yWeight; w != 0 { - pru, pgu, pbu, pau := src.At(kx, ky).RGBA() - if srcMask != nil { - _, _, _, ma := srcMask.At(smp.X+kx, smp.Y+ky).RGBA() - pru = pru * ma / 0xffff - pgu = pgu * ma / 0xffff - pbu = pbu * ma / 0xffff - pau = pau * ma / 0xffff - } - pr += float64(pru) * w - pg += float64(pgu) * w - pb += float64(pbu) * w - pa += float64(pau) * w - } - } - } - } - - if pr > pa { - pr = pa - } - if pg > pa { - pg = pa - } - if pb > pa { - pb = pa - } - - if dstMask != nil { - qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA() - _, _, _, ma := dstMask.At(dmp.X+dr.Min.X+int(dx), dmp.Y+dr.Min.Y+int(dy)).RGBA() - pr := uint32(fffftou(pr)) * ma / 0xffff - pg := uint32(fffftou(pg)) * ma / 0xffff - pb := uint32(fffftou(pb)) * ma / 0xffff - pa := uint32(fffftou(pa)) * ma / 0xffff - pa1 := 0xffff - ma - dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr) - dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg) - dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb) - dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } else { - dstColorRGBA64.R = fffftou(pr) - dstColorRGBA64.G = fffftou(pg) - dstColorRGBA64.B = fffftou(pb) - dstColorRGBA64.A = fffftou(pa) - dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor) - } - } - } -} -- cgit v1.2.3