500a27f912
benchmark old ns/op new ns/op delta BenchmarkTformCRSrcGray 5096041 4820642 -5.40% BenchmarkTformCRSrcNRGBA 10476578 8414331 -19.68% BenchmarkTformCRSrcRGBA 10361135 7954413 -23.23% BenchmarkTformCRSrcYCbCr 11952218 9824899 -17.80% Change-Id: I8b4cfe68ecae85e447ae65ceecf185261445a8a2 Reviewed-on: https://go-review.googlesource.com/7991 Reviewed-by: Rob Pike <r@golang.org>
4645 lines
141 KiB
Go
4645 lines
141 KiB
Go
// generated by "go run gen.go". DO NOT EDIT.
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package draw
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import (
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"image"
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"image/color"
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"math"
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"golang.org/x/image/math/f64"
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)
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func (z nnInterpolator) Scale(dst Image, dr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
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// adr is the affected destination pixels, relative to dr.Min.
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adr := dst.Bounds().Intersect(dr).Sub(dr.Min)
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if adr.Empty() || sr.Empty() {
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return
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}
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// sr is the source pixels. If it extends beyond the src bounds,
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// we cannot use the type-specific fast paths, as they access
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// the Pix fields directly without bounds checking.
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if !sr.In(src.Bounds()) {
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z.scale_Image_Image(dst, dr, adr, src, sr)
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} else if _, ok := src.(*image.Uniform); ok {
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// TODO: get the Op from opts.
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Draw(dst, dr, src, src.Bounds().Min, Src)
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} else {
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switch dst := dst.(type) {
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case *image.RGBA:
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switch src := src.(type) {
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case *image.Gray:
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z.scale_RGBA_Gray(dst, dr, adr, src, sr)
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case *image.NRGBA:
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z.scale_RGBA_NRGBA(dst, dr, adr, src, sr)
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case *image.RGBA:
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z.scale_RGBA_RGBA(dst, dr, adr, src, sr)
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case *image.YCbCr:
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switch src.SubsampleRatio {
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default:
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z.scale_RGBA_Image(dst, dr, adr, src, sr)
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case image.YCbCrSubsampleRatio444:
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z.scale_RGBA_YCbCr444(dst, dr, adr, src, sr)
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case image.YCbCrSubsampleRatio422:
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z.scale_RGBA_YCbCr422(dst, dr, adr, src, sr)
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case image.YCbCrSubsampleRatio420:
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z.scale_RGBA_YCbCr420(dst, dr, adr, src, sr)
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case image.YCbCrSubsampleRatio440:
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z.scale_RGBA_YCbCr440(dst, dr, adr, src, sr)
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}
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default:
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z.scale_RGBA_Image(dst, dr, adr, src, sr)
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}
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default:
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switch src := src.(type) {
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default:
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z.scale_Image_Image(dst, dr, adr, src, sr)
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}
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}
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}
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}
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func (z nnInterpolator) Transform(dst Image, s2d *f64.Aff3, src image.Image, sr image.Rectangle, opts *Options) {
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dr := transformRect(s2d, &sr)
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// adr is the affected destination pixels.
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adr := dst.Bounds().Intersect(dr)
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if adr.Empty() || sr.Empty() {
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return
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}
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d2s := invert(s2d)
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// bias is a translation of the mapping from dst co-ordinates to
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// src co-ordinates such that the latter temporarily have
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// non-negative X and Y co-ordinates. This allows us to write
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// int(f) instead of int(math.Floor(f)), since "round to zero" and
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// "round down" are equivalent when f >= 0, but the former is much
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// cheaper. The X-- and Y-- are because the TransformLeaf methods
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// have a "sx -= 0.5" adjustment.
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bias := transformRect(&d2s, &adr).Min
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bias.X--
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bias.Y--
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d2s[2] -= float64(bias.X)
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d2s[5] -= float64(bias.Y)
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// Make adr relative to dr.Min.
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adr = adr.Sub(dr.Min)
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// sr is the source pixels. If it extends beyond the src bounds,
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// we cannot use the type-specific fast paths, as they access
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// the Pix fields directly without bounds checking.
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if !sr.In(src.Bounds()) {
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z.transform_Image_Image(dst, dr, adr, &d2s, src, sr, bias)
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} else if u, ok := src.(*image.Uniform); ok {
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// TODO: get the Op from opts.
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transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, Src)
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} else {
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switch dst := dst.(type) {
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case *image.RGBA:
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switch src := src.(type) {
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case *image.Gray:
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z.transform_RGBA_Gray(dst, dr, adr, &d2s, src, sr, bias)
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case *image.NRGBA:
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z.transform_RGBA_NRGBA(dst, dr, adr, &d2s, src, sr, bias)
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case *image.RGBA:
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z.transform_RGBA_RGBA(dst, dr, adr, &d2s, src, sr, bias)
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case *image.YCbCr:
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switch src.SubsampleRatio {
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default:
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z.transform_RGBA_Image(dst, dr, adr, &d2s, src, sr, bias)
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case image.YCbCrSubsampleRatio444:
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z.transform_RGBA_YCbCr444(dst, dr, adr, &d2s, src, sr, bias)
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case image.YCbCrSubsampleRatio422:
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z.transform_RGBA_YCbCr422(dst, dr, adr, &d2s, src, sr, bias)
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case image.YCbCrSubsampleRatio420:
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z.transform_RGBA_YCbCr420(dst, dr, adr, &d2s, src, sr, bias)
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case image.YCbCrSubsampleRatio440:
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z.transform_RGBA_YCbCr440(dst, dr, adr, &d2s, src, sr, bias)
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}
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default:
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z.transform_RGBA_Image(dst, dr, adr, &d2s, src, sr, bias)
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}
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default:
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switch src := src.(type) {
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default:
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z.transform_Image_Image(dst, dr, adr, &d2s, src, sr, bias)
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}
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}
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}
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}
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func (nnInterpolator) scale_RGBA_Gray(dst *image.RGBA, dr, adr image.Rectangle, src *image.Gray, sr image.Rectangle) {
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dw2 := uint64(dr.Dx()) * 2
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dh2 := uint64(dr.Dy()) * 2
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sw := uint64(sr.Dx())
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sh := uint64(sr.Dy())
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for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
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sy := (2*uint64(dy) + 1) * sh / dh2
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d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
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for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
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sx := (2*uint64(dx) + 1) * sw / dw2
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pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(sx) - src.Rect.Min.X)
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pr := uint32(src.Pix[pi]) * 0x101
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out := uint8(uint32(pr) >> 8)
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dst.Pix[d+0] = out
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dst.Pix[d+1] = out
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dst.Pix[d+2] = out
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dst.Pix[d+3] = 0xff
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}
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}
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}
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func (nnInterpolator) scale_RGBA_NRGBA(dst *image.RGBA, dr, adr image.Rectangle, src *image.NRGBA, sr image.Rectangle) {
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dw2 := uint64(dr.Dx()) * 2
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dh2 := uint64(dr.Dy()) * 2
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sw := uint64(sr.Dx())
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sh := uint64(sr.Dy())
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for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
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sy := (2*uint64(dy) + 1) * sh / dh2
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d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
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for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
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sx := (2*uint64(dx) + 1) * sw / dw2
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pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4
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pa := uint32(src.Pix[pi+3]) * 0x101
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pr := uint32(src.Pix[pi+0]) * pa / 0xff
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pg := uint32(src.Pix[pi+1]) * pa / 0xff
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pb := uint32(src.Pix[pi+2]) * pa / 0xff
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dst.Pix[d+0] = uint8(uint32(pr) >> 8)
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dst.Pix[d+1] = uint8(uint32(pg) >> 8)
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dst.Pix[d+2] = uint8(uint32(pb) >> 8)
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dst.Pix[d+3] = uint8(uint32(pa) >> 8)
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}
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}
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}
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func (nnInterpolator) scale_RGBA_RGBA(dst *image.RGBA, dr, adr image.Rectangle, src *image.RGBA, sr image.Rectangle) {
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dw2 := uint64(dr.Dx()) * 2
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dh2 := uint64(dr.Dy()) * 2
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sw := uint64(sr.Dx())
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sh := uint64(sr.Dy())
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for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
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sy := (2*uint64(dy) + 1) * sh / dh2
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d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
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for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
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sx := (2*uint64(dx) + 1) * sw / dw2
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pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4
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pr := uint32(src.Pix[pi+0]) * 0x101
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pg := uint32(src.Pix[pi+1]) * 0x101
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pb := uint32(src.Pix[pi+2]) * 0x101
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pa := uint32(src.Pix[pi+3]) * 0x101
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dst.Pix[d+0] = uint8(uint32(pr) >> 8)
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dst.Pix[d+1] = uint8(uint32(pg) >> 8)
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dst.Pix[d+2] = uint8(uint32(pb) >> 8)
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dst.Pix[d+3] = uint8(uint32(pa) >> 8)
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}
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}
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}
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func (nnInterpolator) scale_RGBA_YCbCr444(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle) {
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dw2 := uint64(dr.Dx()) * 2
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dh2 := uint64(dr.Dy()) * 2
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sw := uint64(sr.Dx())
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sh := uint64(sr.Dy())
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for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
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sy := (2*uint64(dy) + 1) * sh / dh2
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d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
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for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
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sx := (2*uint64(dx) + 1) * sw / dw2
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pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
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pj := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
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// This is an inline version of image/color/ycbcr.go's func YCbCrToRGB.
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pyy1 := int(src.Y[pi])<<16 + 1<<15
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pcb1 := int(src.Cb[pj]) - 128
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pcr1 := int(src.Cr[pj]) - 128
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pr8 := (pyy1 + 91881*pcr1) >> 16
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pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
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pb8 := (pyy1 + 116130*pcb1) >> 16
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if pr8 < 0 {
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pr8 = 0
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} else if pr8 > 0xff {
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pr8 = 0xff
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}
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if pg8 < 0 {
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pg8 = 0
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} else if pg8 > 0xff {
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pg8 = 0xff
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}
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if pb8 < 0 {
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pb8 = 0
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} else if pb8 > 0xff {
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pb8 = 0xff
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}
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pr := uint32(pr8) * 0x101
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pg := uint32(pg8) * 0x101
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pb := uint32(pb8) * 0x101
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dst.Pix[d+0] = uint8(uint32(pr) >> 8)
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dst.Pix[d+1] = uint8(uint32(pg) >> 8)
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dst.Pix[d+2] = uint8(uint32(pb) >> 8)
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dst.Pix[d+3] = 0xff
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}
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}
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}
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func (nnInterpolator) scale_RGBA_YCbCr422(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle) {
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dw2 := uint64(dr.Dx()) * 2
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dh2 := uint64(dr.Dy()) * 2
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sw := uint64(sr.Dx())
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sh := uint64(sr.Dy())
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for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
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sy := (2*uint64(dy) + 1) * sh / dh2
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d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
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for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
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sx := (2*uint64(dx) + 1) * sw / dw2
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pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
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pj := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx))/2 - src.Rect.Min.X/2)
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// This is an inline version of image/color/ycbcr.go's func YCbCrToRGB.
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pyy1 := int(src.Y[pi])<<16 + 1<<15
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pcb1 := int(src.Cb[pj]) - 128
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pcr1 := int(src.Cr[pj]) - 128
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pr8 := (pyy1 + 91881*pcr1) >> 16
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pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
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pb8 := (pyy1 + 116130*pcb1) >> 16
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if pr8 < 0 {
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pr8 = 0
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} else if pr8 > 0xff {
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pr8 = 0xff
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}
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if pg8 < 0 {
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pg8 = 0
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} else if pg8 > 0xff {
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pg8 = 0xff
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}
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if pb8 < 0 {
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pb8 = 0
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} else if pb8 > 0xff {
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pb8 = 0xff
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}
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pr := uint32(pr8) * 0x101
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pg := uint32(pg8) * 0x101
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pb := uint32(pb8) * 0x101
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dst.Pix[d+0] = uint8(uint32(pr) >> 8)
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dst.Pix[d+1] = uint8(uint32(pg) >> 8)
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dst.Pix[d+2] = uint8(uint32(pb) >> 8)
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dst.Pix[d+3] = 0xff
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}
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}
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}
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func (nnInterpolator) scale_RGBA_YCbCr420(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle) {
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dw2 := uint64(dr.Dx()) * 2
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dh2 := uint64(dr.Dy()) * 2
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sw := uint64(sr.Dx())
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sh := uint64(sr.Dy())
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for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
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sy := (2*uint64(dy) + 1) * sh / dh2
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d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
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for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
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sx := (2*uint64(dx) + 1) * sw / dw2
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pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
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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)
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// This is an inline version of image/color/ycbcr.go's func YCbCrToRGB.
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pyy1 := int(src.Y[pi])<<16 + 1<<15
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pcb1 := int(src.Cb[pj]) - 128
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pcr1 := int(src.Cr[pj]) - 128
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pr8 := (pyy1 + 91881*pcr1) >> 16
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pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
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pb8 := (pyy1 + 116130*pcb1) >> 16
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if pr8 < 0 {
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pr8 = 0
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} else if pr8 > 0xff {
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pr8 = 0xff
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}
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if pg8 < 0 {
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pg8 = 0
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} else if pg8 > 0xff {
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pg8 = 0xff
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}
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if pb8 < 0 {
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pb8 = 0
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} else if pb8 > 0xff {
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pb8 = 0xff
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}
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pr := uint32(pr8) * 0x101
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pg := uint32(pg8) * 0x101
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pb := uint32(pb8) * 0x101
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dst.Pix[d+0] = uint8(uint32(pr) >> 8)
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dst.Pix[d+1] = uint8(uint32(pg) >> 8)
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dst.Pix[d+2] = uint8(uint32(pb) >> 8)
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dst.Pix[d+3] = 0xff
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}
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}
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}
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func (nnInterpolator) scale_RGBA_YCbCr440(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle) {
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dw2 := uint64(dr.Dx()) * 2
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dh2 := uint64(dr.Dy()) * 2
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sw := uint64(sr.Dx())
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sh := uint64(sr.Dy())
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for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
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sy := (2*uint64(dy) + 1) * sh / dh2
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d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
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for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
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sx := (2*uint64(dx) + 1) * sw / dw2
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pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
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pj := ((sr.Min.Y+int(sy))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
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// This is an inline version of image/color/ycbcr.go's func YCbCrToRGB.
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pyy1 := int(src.Y[pi])<<16 + 1<<15
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pcb1 := int(src.Cb[pj]) - 128
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pcr1 := int(src.Cr[pj]) - 128
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pr8 := (pyy1 + 91881*pcr1) >> 16
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pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
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pb8 := (pyy1 + 116130*pcb1) >> 16
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if pr8 < 0 {
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pr8 = 0
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} else if pr8 > 0xff {
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pr8 = 0xff
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}
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if pg8 < 0 {
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pg8 = 0
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} else if pg8 > 0xff {
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pg8 = 0xff
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|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pr := uint32(pr8) * 0x101
|
|
pg := uint32(pg8) * 0x101
|
|
pb := uint32(pb8) * 0x101
|
|
dst.Pix[d+0] = uint8(uint32(pr) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(pg) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(pb) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (nnInterpolator) scale_RGBA_Image(dst *image.RGBA, dr, adr image.Rectangle, src image.Image, sr image.Rectangle) {
|
|
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(uint32(pr) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(pg) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(pb) >> 8)
|
|
dst.Pix[d+3] = uint8(uint32(pa) >> 8)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (nnInterpolator) scale_Image_Image(dst Image, dr, adr image.Rectangle, src image.Image, sr image.Rectangle) {
|
|
dw2 := uint64(dr.Dx()) * 2
|
|
dh2 := uint64(dr.Dy()) * 2
|
|
sw := uint64(sr.Dx())
|
|
sh := uint64(sr.Dy())
|
|
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()
|
|
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(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.Gray, sr image.Rectangle, bias image.Point) {
|
|
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(uint32(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(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point) {
|
|
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(uint32(pr) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(pg) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(pb) >> 8)
|
|
dst.Pix[d+3] = uint8(uint32(pa) >> 8)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (nnInterpolator) transform_RGBA_RGBA(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point) {
|
|
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(uint32(pr) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(pg) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(pb) >> 8)
|
|
dst.Pix[d+3] = uint8(uint32(pa) >> 8)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (nnInterpolator) transform_RGBA_YCbCr444(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point) {
|
|
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 func YCbCrToRGB.
|
|
pyy1 := int(src.Y[pi])<<16 + 1<<15
|
|
pcb1 := int(src.Cb[pj]) - 128
|
|
pcr1 := int(src.Cr[pj]) - 128
|
|
pr8 := (pyy1 + 91881*pcr1) >> 16
|
|
pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
|
|
pb8 := (pyy1 + 116130*pcb1) >> 16
|
|
if pr8 < 0 {
|
|
pr8 = 0
|
|
} else if pr8 > 0xff {
|
|
pr8 = 0xff
|
|
}
|
|
if pg8 < 0 {
|
|
pg8 = 0
|
|
} else if pg8 > 0xff {
|
|
pg8 = 0xff
|
|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pr := uint32(pr8) * 0x101
|
|
pg := uint32(pg8) * 0x101
|
|
pb := uint32(pb8) * 0x101
|
|
dst.Pix[d+0] = uint8(uint32(pr) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(pg) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(pb) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (nnInterpolator) transform_RGBA_YCbCr422(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point) {
|
|
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 func YCbCrToRGB.
|
|
pyy1 := int(src.Y[pi])<<16 + 1<<15
|
|
pcb1 := int(src.Cb[pj]) - 128
|
|
pcr1 := int(src.Cr[pj]) - 128
|
|
pr8 := (pyy1 + 91881*pcr1) >> 16
|
|
pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
|
|
pb8 := (pyy1 + 116130*pcb1) >> 16
|
|
if pr8 < 0 {
|
|
pr8 = 0
|
|
} else if pr8 > 0xff {
|
|
pr8 = 0xff
|
|
}
|
|
if pg8 < 0 {
|
|
pg8 = 0
|
|
} else if pg8 > 0xff {
|
|
pg8 = 0xff
|
|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pr := uint32(pr8) * 0x101
|
|
pg := uint32(pg8) * 0x101
|
|
pb := uint32(pb8) * 0x101
|
|
dst.Pix[d+0] = uint8(uint32(pr) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(pg) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(pb) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (nnInterpolator) transform_RGBA_YCbCr420(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point) {
|
|
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 func YCbCrToRGB.
|
|
pyy1 := int(src.Y[pi])<<16 + 1<<15
|
|
pcb1 := int(src.Cb[pj]) - 128
|
|
pcr1 := int(src.Cr[pj]) - 128
|
|
pr8 := (pyy1 + 91881*pcr1) >> 16
|
|
pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
|
|
pb8 := (pyy1 + 116130*pcb1) >> 16
|
|
if pr8 < 0 {
|
|
pr8 = 0
|
|
} else if pr8 > 0xff {
|
|
pr8 = 0xff
|
|
}
|
|
if pg8 < 0 {
|
|
pg8 = 0
|
|
} else if pg8 > 0xff {
|
|
pg8 = 0xff
|
|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pr := uint32(pr8) * 0x101
|
|
pg := uint32(pg8) * 0x101
|
|
pb := uint32(pb8) * 0x101
|
|
dst.Pix[d+0] = uint8(uint32(pr) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(pg) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(pb) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (nnInterpolator) transform_RGBA_YCbCr440(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point) {
|
|
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 func YCbCrToRGB.
|
|
pyy1 := int(src.Y[pi])<<16 + 1<<15
|
|
pcb1 := int(src.Cb[pj]) - 128
|
|
pcr1 := int(src.Cr[pj]) - 128
|
|
pr8 := (pyy1 + 91881*pcr1) >> 16
|
|
pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
|
|
pb8 := (pyy1 + 116130*pcb1) >> 16
|
|
if pr8 < 0 {
|
|
pr8 = 0
|
|
} else if pr8 > 0xff {
|
|
pr8 = 0xff
|
|
}
|
|
if pg8 < 0 {
|
|
pg8 = 0
|
|
} else if pg8 > 0xff {
|
|
pg8 = 0xff
|
|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pr := uint32(pr8) * 0x101
|
|
pg := uint32(pg8) * 0x101
|
|
pb := uint32(pb8) * 0x101
|
|
dst.Pix[d+0] = uint8(uint32(pr) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(pg) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(pb) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (nnInterpolator) transform_RGBA_Image(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point) {
|
|
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(uint32(pr) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(pg) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(pb) >> 8)
|
|
dst.Pix[d+3] = uint8(uint32(pa) >> 8)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (nnInterpolator) transform_Image_Image(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point) {
|
|
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()
|
|
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, opts *Options) {
|
|
// adr is the affected destination pixels, relative to dr.Min.
|
|
adr := dst.Bounds().Intersect(dr).Sub(dr.Min)
|
|
if adr.Empty() || sr.Empty() {
|
|
return
|
|
}
|
|
// 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.
|
|
if !sr.In(src.Bounds()) {
|
|
z.scale_Image_Image(dst, dr, adr, src, sr)
|
|
} else if _, ok := src.(*image.Uniform); ok {
|
|
// TODO: get the Op from opts.
|
|
Draw(dst, dr, src, src.Bounds().Min, Src)
|
|
} else {
|
|
switch dst := dst.(type) {
|
|
case *image.RGBA:
|
|
switch src := src.(type) {
|
|
case *image.Gray:
|
|
z.scale_RGBA_Gray(dst, dr, adr, src, sr)
|
|
case *image.NRGBA:
|
|
z.scale_RGBA_NRGBA(dst, dr, adr, src, sr)
|
|
case *image.RGBA:
|
|
z.scale_RGBA_RGBA(dst, dr, adr, src, sr)
|
|
case *image.YCbCr:
|
|
switch src.SubsampleRatio {
|
|
default:
|
|
z.scale_RGBA_Image(dst, dr, adr, src, sr)
|
|
case image.YCbCrSubsampleRatio444:
|
|
z.scale_RGBA_YCbCr444(dst, dr, adr, src, sr)
|
|
case image.YCbCrSubsampleRatio422:
|
|
z.scale_RGBA_YCbCr422(dst, dr, adr, src, sr)
|
|
case image.YCbCrSubsampleRatio420:
|
|
z.scale_RGBA_YCbCr420(dst, dr, adr, src, sr)
|
|
case image.YCbCrSubsampleRatio440:
|
|
z.scale_RGBA_YCbCr440(dst, dr, adr, src, sr)
|
|
}
|
|
default:
|
|
z.scale_RGBA_Image(dst, dr, adr, src, sr)
|
|
}
|
|
default:
|
|
switch src := src.(type) {
|
|
default:
|
|
z.scale_Image_Image(dst, dr, adr, src, sr)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (z ablInterpolator) Transform(dst Image, s2d *f64.Aff3, src image.Image, sr image.Rectangle, opts *Options) {
|
|
dr := transformRect(s2d, &sr)
|
|
// adr is the affected destination pixels.
|
|
adr := dst.Bounds().Intersect(dr)
|
|
if adr.Empty() || sr.Empty() {
|
|
return
|
|
}
|
|
d2s := invert(s2d)
|
|
// bias is a translation of the mapping from dst co-ordinates to
|
|
// src co-ordinates such that the latter temporarily have
|
|
// non-negative X and Y co-ordinates. 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.
|
|
if !sr.In(src.Bounds()) {
|
|
z.transform_Image_Image(dst, dr, adr, &d2s, src, sr, bias)
|
|
} else if u, ok := src.(*image.Uniform); ok {
|
|
// TODO: get the Op from opts.
|
|
transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, Src)
|
|
} else {
|
|
switch dst := dst.(type) {
|
|
case *image.RGBA:
|
|
switch src := src.(type) {
|
|
case *image.Gray:
|
|
z.transform_RGBA_Gray(dst, dr, adr, &d2s, src, sr, bias)
|
|
case *image.NRGBA:
|
|
z.transform_RGBA_NRGBA(dst, dr, adr, &d2s, src, sr, bias)
|
|
case *image.RGBA:
|
|
z.transform_RGBA_RGBA(dst, dr, adr, &d2s, src, sr, bias)
|
|
case *image.YCbCr:
|
|
switch src.SubsampleRatio {
|
|
default:
|
|
z.transform_RGBA_Image(dst, dr, adr, &d2s, src, sr, bias)
|
|
case image.YCbCrSubsampleRatio444:
|
|
z.transform_RGBA_YCbCr444(dst, dr, adr, &d2s, src, sr, bias)
|
|
case image.YCbCrSubsampleRatio422:
|
|
z.transform_RGBA_YCbCr422(dst, dr, adr, &d2s, src, sr, bias)
|
|
case image.YCbCrSubsampleRatio420:
|
|
z.transform_RGBA_YCbCr420(dst, dr, adr, &d2s, src, sr, bias)
|
|
case image.YCbCrSubsampleRatio440:
|
|
z.transform_RGBA_YCbCr440(dst, dr, adr, &d2s, src, sr, bias)
|
|
}
|
|
default:
|
|
z.transform_RGBA_Image(dst, dr, adr, &d2s, src, sr, bias)
|
|
}
|
|
default:
|
|
switch src := src.(type) {
|
|
default:
|
|
z.transform_Image_Image(dst, dr, adr, &d2s, src, sr, bias)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) scale_RGBA_Gray(dst *image.RGBA, dr, adr image.Rectangle, src *image.Gray, sr image.Rectangle) {
|
|
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
|
|
out := uint8(uint32(s11r) >> 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(dst *image.RGBA, dr, adr image.Rectangle, src *image.NRGBA, sr image.Rectangle) {
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = uint8(uint32(s11a) >> 8)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) scale_RGBA_RGBA(dst *image.RGBA, dr, adr image.Rectangle, src *image.RGBA, sr image.Rectangle) {
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = uint8(uint32(s11a) >> 8)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) scale_RGBA_YCbCr444(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle) {
|
|
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 func YCbCrToRGB.
|
|
s00yy1 := int(src.Y[s00i])<<16 + 1<<15
|
|
s00cb1 := int(src.Cb[s00j]) - 128
|
|
s00cr1 := int(src.Cr[s00j]) - 128
|
|
s00r8 := (s00yy1 + 91881*s00cr1) >> 16
|
|
s00g8 := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 16
|
|
s00b8 := (s00yy1 + 116130*s00cb1) >> 16
|
|
if s00r8 < 0 {
|
|
s00r8 = 0
|
|
} else if s00r8 > 0xff {
|
|
s00r8 = 0xff
|
|
}
|
|
if s00g8 < 0 {
|
|
s00g8 = 0
|
|
} else if s00g8 > 0xff {
|
|
s00g8 = 0xff
|
|
}
|
|
if s00b8 < 0 {
|
|
s00b8 = 0
|
|
} else if s00b8 > 0xff {
|
|
s00b8 = 0xff
|
|
}
|
|
|
|
s00ru := uint32(s00r8) * 0x101
|
|
s00gu := uint32(s00g8) * 0x101
|
|
s00bu := uint32(s00b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s10yy1 := int(src.Y[s10i])<<16 + 1<<15
|
|
s10cb1 := int(src.Cb[s10j]) - 128
|
|
s10cr1 := int(src.Cr[s10j]) - 128
|
|
s10r8 := (s10yy1 + 91881*s10cr1) >> 16
|
|
s10g8 := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 16
|
|
s10b8 := (s10yy1 + 116130*s10cb1) >> 16
|
|
if s10r8 < 0 {
|
|
s10r8 = 0
|
|
} else if s10r8 > 0xff {
|
|
s10r8 = 0xff
|
|
}
|
|
if s10g8 < 0 {
|
|
s10g8 = 0
|
|
} else if s10g8 > 0xff {
|
|
s10g8 = 0xff
|
|
}
|
|
if s10b8 < 0 {
|
|
s10b8 = 0
|
|
} else if s10b8 > 0xff {
|
|
s10b8 = 0xff
|
|
}
|
|
|
|
s10ru := uint32(s10r8) * 0x101
|
|
s10gu := uint32(s10g8) * 0x101
|
|
s10bu := uint32(s10b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s01yy1 := int(src.Y[s01i])<<16 + 1<<15
|
|
s01cb1 := int(src.Cb[s01j]) - 128
|
|
s01cr1 := int(src.Cr[s01j]) - 128
|
|
s01r8 := (s01yy1 + 91881*s01cr1) >> 16
|
|
s01g8 := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 16
|
|
s01b8 := (s01yy1 + 116130*s01cb1) >> 16
|
|
if s01r8 < 0 {
|
|
s01r8 = 0
|
|
} else if s01r8 > 0xff {
|
|
s01r8 = 0xff
|
|
}
|
|
if s01g8 < 0 {
|
|
s01g8 = 0
|
|
} else if s01g8 > 0xff {
|
|
s01g8 = 0xff
|
|
}
|
|
if s01b8 < 0 {
|
|
s01b8 = 0
|
|
} else if s01b8 > 0xff {
|
|
s01b8 = 0xff
|
|
}
|
|
|
|
s01ru := uint32(s01r8) * 0x101
|
|
s01gu := uint32(s01g8) * 0x101
|
|
s01bu := uint32(s01b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s11yy1 := int(src.Y[s11i])<<16 + 1<<15
|
|
s11cb1 := int(src.Cb[s11j]) - 128
|
|
s11cr1 := int(src.Cr[s11j]) - 128
|
|
s11r8 := (s11yy1 + 91881*s11cr1) >> 16
|
|
s11g8 := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 16
|
|
s11b8 := (s11yy1 + 116130*s11cb1) >> 16
|
|
if s11r8 < 0 {
|
|
s11r8 = 0
|
|
} else if s11r8 > 0xff {
|
|
s11r8 = 0xff
|
|
}
|
|
if s11g8 < 0 {
|
|
s11g8 = 0
|
|
} else if s11g8 > 0xff {
|
|
s11g8 = 0xff
|
|
}
|
|
if s11b8 < 0 {
|
|
s11b8 = 0
|
|
} else if s11b8 > 0xff {
|
|
s11b8 = 0xff
|
|
}
|
|
|
|
s11ru := uint32(s11r8) * 0x101
|
|
s11gu := uint32(s11g8) * 0x101
|
|
s11bu := uint32(s11b8) * 0x101
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) scale_RGBA_YCbCr422(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle) {
|
|
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 func YCbCrToRGB.
|
|
s00yy1 := int(src.Y[s00i])<<16 + 1<<15
|
|
s00cb1 := int(src.Cb[s00j]) - 128
|
|
s00cr1 := int(src.Cr[s00j]) - 128
|
|
s00r8 := (s00yy1 + 91881*s00cr1) >> 16
|
|
s00g8 := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 16
|
|
s00b8 := (s00yy1 + 116130*s00cb1) >> 16
|
|
if s00r8 < 0 {
|
|
s00r8 = 0
|
|
} else if s00r8 > 0xff {
|
|
s00r8 = 0xff
|
|
}
|
|
if s00g8 < 0 {
|
|
s00g8 = 0
|
|
} else if s00g8 > 0xff {
|
|
s00g8 = 0xff
|
|
}
|
|
if s00b8 < 0 {
|
|
s00b8 = 0
|
|
} else if s00b8 > 0xff {
|
|
s00b8 = 0xff
|
|
}
|
|
|
|
s00ru := uint32(s00r8) * 0x101
|
|
s00gu := uint32(s00g8) * 0x101
|
|
s00bu := uint32(s00b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s10yy1 := int(src.Y[s10i])<<16 + 1<<15
|
|
s10cb1 := int(src.Cb[s10j]) - 128
|
|
s10cr1 := int(src.Cr[s10j]) - 128
|
|
s10r8 := (s10yy1 + 91881*s10cr1) >> 16
|
|
s10g8 := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 16
|
|
s10b8 := (s10yy1 + 116130*s10cb1) >> 16
|
|
if s10r8 < 0 {
|
|
s10r8 = 0
|
|
} else if s10r8 > 0xff {
|
|
s10r8 = 0xff
|
|
}
|
|
if s10g8 < 0 {
|
|
s10g8 = 0
|
|
} else if s10g8 > 0xff {
|
|
s10g8 = 0xff
|
|
}
|
|
if s10b8 < 0 {
|
|
s10b8 = 0
|
|
} else if s10b8 > 0xff {
|
|
s10b8 = 0xff
|
|
}
|
|
|
|
s10ru := uint32(s10r8) * 0x101
|
|
s10gu := uint32(s10g8) * 0x101
|
|
s10bu := uint32(s10b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s01yy1 := int(src.Y[s01i])<<16 + 1<<15
|
|
s01cb1 := int(src.Cb[s01j]) - 128
|
|
s01cr1 := int(src.Cr[s01j]) - 128
|
|
s01r8 := (s01yy1 + 91881*s01cr1) >> 16
|
|
s01g8 := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 16
|
|
s01b8 := (s01yy1 + 116130*s01cb1) >> 16
|
|
if s01r8 < 0 {
|
|
s01r8 = 0
|
|
} else if s01r8 > 0xff {
|
|
s01r8 = 0xff
|
|
}
|
|
if s01g8 < 0 {
|
|
s01g8 = 0
|
|
} else if s01g8 > 0xff {
|
|
s01g8 = 0xff
|
|
}
|
|
if s01b8 < 0 {
|
|
s01b8 = 0
|
|
} else if s01b8 > 0xff {
|
|
s01b8 = 0xff
|
|
}
|
|
|
|
s01ru := uint32(s01r8) * 0x101
|
|
s01gu := uint32(s01g8) * 0x101
|
|
s01bu := uint32(s01b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s11yy1 := int(src.Y[s11i])<<16 + 1<<15
|
|
s11cb1 := int(src.Cb[s11j]) - 128
|
|
s11cr1 := int(src.Cr[s11j]) - 128
|
|
s11r8 := (s11yy1 + 91881*s11cr1) >> 16
|
|
s11g8 := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 16
|
|
s11b8 := (s11yy1 + 116130*s11cb1) >> 16
|
|
if s11r8 < 0 {
|
|
s11r8 = 0
|
|
} else if s11r8 > 0xff {
|
|
s11r8 = 0xff
|
|
}
|
|
if s11g8 < 0 {
|
|
s11g8 = 0
|
|
} else if s11g8 > 0xff {
|
|
s11g8 = 0xff
|
|
}
|
|
if s11b8 < 0 {
|
|
s11b8 = 0
|
|
} else if s11b8 > 0xff {
|
|
s11b8 = 0xff
|
|
}
|
|
|
|
s11ru := uint32(s11r8) * 0x101
|
|
s11gu := uint32(s11g8) * 0x101
|
|
s11bu := uint32(s11b8) * 0x101
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) scale_RGBA_YCbCr420(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle) {
|
|
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 func YCbCrToRGB.
|
|
s00yy1 := int(src.Y[s00i])<<16 + 1<<15
|
|
s00cb1 := int(src.Cb[s00j]) - 128
|
|
s00cr1 := int(src.Cr[s00j]) - 128
|
|
s00r8 := (s00yy1 + 91881*s00cr1) >> 16
|
|
s00g8 := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 16
|
|
s00b8 := (s00yy1 + 116130*s00cb1) >> 16
|
|
if s00r8 < 0 {
|
|
s00r8 = 0
|
|
} else if s00r8 > 0xff {
|
|
s00r8 = 0xff
|
|
}
|
|
if s00g8 < 0 {
|
|
s00g8 = 0
|
|
} else if s00g8 > 0xff {
|
|
s00g8 = 0xff
|
|
}
|
|
if s00b8 < 0 {
|
|
s00b8 = 0
|
|
} else if s00b8 > 0xff {
|
|
s00b8 = 0xff
|
|
}
|
|
|
|
s00ru := uint32(s00r8) * 0x101
|
|
s00gu := uint32(s00g8) * 0x101
|
|
s00bu := uint32(s00b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s10yy1 := int(src.Y[s10i])<<16 + 1<<15
|
|
s10cb1 := int(src.Cb[s10j]) - 128
|
|
s10cr1 := int(src.Cr[s10j]) - 128
|
|
s10r8 := (s10yy1 + 91881*s10cr1) >> 16
|
|
s10g8 := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 16
|
|
s10b8 := (s10yy1 + 116130*s10cb1) >> 16
|
|
if s10r8 < 0 {
|
|
s10r8 = 0
|
|
} else if s10r8 > 0xff {
|
|
s10r8 = 0xff
|
|
}
|
|
if s10g8 < 0 {
|
|
s10g8 = 0
|
|
} else if s10g8 > 0xff {
|
|
s10g8 = 0xff
|
|
}
|
|
if s10b8 < 0 {
|
|
s10b8 = 0
|
|
} else if s10b8 > 0xff {
|
|
s10b8 = 0xff
|
|
}
|
|
|
|
s10ru := uint32(s10r8) * 0x101
|
|
s10gu := uint32(s10g8) * 0x101
|
|
s10bu := uint32(s10b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s01yy1 := int(src.Y[s01i])<<16 + 1<<15
|
|
s01cb1 := int(src.Cb[s01j]) - 128
|
|
s01cr1 := int(src.Cr[s01j]) - 128
|
|
s01r8 := (s01yy1 + 91881*s01cr1) >> 16
|
|
s01g8 := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 16
|
|
s01b8 := (s01yy1 + 116130*s01cb1) >> 16
|
|
if s01r8 < 0 {
|
|
s01r8 = 0
|
|
} else if s01r8 > 0xff {
|
|
s01r8 = 0xff
|
|
}
|
|
if s01g8 < 0 {
|
|
s01g8 = 0
|
|
} else if s01g8 > 0xff {
|
|
s01g8 = 0xff
|
|
}
|
|
if s01b8 < 0 {
|
|
s01b8 = 0
|
|
} else if s01b8 > 0xff {
|
|
s01b8 = 0xff
|
|
}
|
|
|
|
s01ru := uint32(s01r8) * 0x101
|
|
s01gu := uint32(s01g8) * 0x101
|
|
s01bu := uint32(s01b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s11yy1 := int(src.Y[s11i])<<16 + 1<<15
|
|
s11cb1 := int(src.Cb[s11j]) - 128
|
|
s11cr1 := int(src.Cr[s11j]) - 128
|
|
s11r8 := (s11yy1 + 91881*s11cr1) >> 16
|
|
s11g8 := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 16
|
|
s11b8 := (s11yy1 + 116130*s11cb1) >> 16
|
|
if s11r8 < 0 {
|
|
s11r8 = 0
|
|
} else if s11r8 > 0xff {
|
|
s11r8 = 0xff
|
|
}
|
|
if s11g8 < 0 {
|
|
s11g8 = 0
|
|
} else if s11g8 > 0xff {
|
|
s11g8 = 0xff
|
|
}
|
|
if s11b8 < 0 {
|
|
s11b8 = 0
|
|
} else if s11b8 > 0xff {
|
|
s11b8 = 0xff
|
|
}
|
|
|
|
s11ru := uint32(s11r8) * 0x101
|
|
s11gu := uint32(s11g8) * 0x101
|
|
s11bu := uint32(s11b8) * 0x101
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) scale_RGBA_YCbCr440(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle) {
|
|
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 func YCbCrToRGB.
|
|
s00yy1 := int(src.Y[s00i])<<16 + 1<<15
|
|
s00cb1 := int(src.Cb[s00j]) - 128
|
|
s00cr1 := int(src.Cr[s00j]) - 128
|
|
s00r8 := (s00yy1 + 91881*s00cr1) >> 16
|
|
s00g8 := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 16
|
|
s00b8 := (s00yy1 + 116130*s00cb1) >> 16
|
|
if s00r8 < 0 {
|
|
s00r8 = 0
|
|
} else if s00r8 > 0xff {
|
|
s00r8 = 0xff
|
|
}
|
|
if s00g8 < 0 {
|
|
s00g8 = 0
|
|
} else if s00g8 > 0xff {
|
|
s00g8 = 0xff
|
|
}
|
|
if s00b8 < 0 {
|
|
s00b8 = 0
|
|
} else if s00b8 > 0xff {
|
|
s00b8 = 0xff
|
|
}
|
|
|
|
s00ru := uint32(s00r8) * 0x101
|
|
s00gu := uint32(s00g8) * 0x101
|
|
s00bu := uint32(s00b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s10yy1 := int(src.Y[s10i])<<16 + 1<<15
|
|
s10cb1 := int(src.Cb[s10j]) - 128
|
|
s10cr1 := int(src.Cr[s10j]) - 128
|
|
s10r8 := (s10yy1 + 91881*s10cr1) >> 16
|
|
s10g8 := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 16
|
|
s10b8 := (s10yy1 + 116130*s10cb1) >> 16
|
|
if s10r8 < 0 {
|
|
s10r8 = 0
|
|
} else if s10r8 > 0xff {
|
|
s10r8 = 0xff
|
|
}
|
|
if s10g8 < 0 {
|
|
s10g8 = 0
|
|
} else if s10g8 > 0xff {
|
|
s10g8 = 0xff
|
|
}
|
|
if s10b8 < 0 {
|
|
s10b8 = 0
|
|
} else if s10b8 > 0xff {
|
|
s10b8 = 0xff
|
|
}
|
|
|
|
s10ru := uint32(s10r8) * 0x101
|
|
s10gu := uint32(s10g8) * 0x101
|
|
s10bu := uint32(s10b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s01yy1 := int(src.Y[s01i])<<16 + 1<<15
|
|
s01cb1 := int(src.Cb[s01j]) - 128
|
|
s01cr1 := int(src.Cr[s01j]) - 128
|
|
s01r8 := (s01yy1 + 91881*s01cr1) >> 16
|
|
s01g8 := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 16
|
|
s01b8 := (s01yy1 + 116130*s01cb1) >> 16
|
|
if s01r8 < 0 {
|
|
s01r8 = 0
|
|
} else if s01r8 > 0xff {
|
|
s01r8 = 0xff
|
|
}
|
|
if s01g8 < 0 {
|
|
s01g8 = 0
|
|
} else if s01g8 > 0xff {
|
|
s01g8 = 0xff
|
|
}
|
|
if s01b8 < 0 {
|
|
s01b8 = 0
|
|
} else if s01b8 > 0xff {
|
|
s01b8 = 0xff
|
|
}
|
|
|
|
s01ru := uint32(s01r8) * 0x101
|
|
s01gu := uint32(s01g8) * 0x101
|
|
s01bu := uint32(s01b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s11yy1 := int(src.Y[s11i])<<16 + 1<<15
|
|
s11cb1 := int(src.Cb[s11j]) - 128
|
|
s11cr1 := int(src.Cr[s11j]) - 128
|
|
s11r8 := (s11yy1 + 91881*s11cr1) >> 16
|
|
s11g8 := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 16
|
|
s11b8 := (s11yy1 + 116130*s11cb1) >> 16
|
|
if s11r8 < 0 {
|
|
s11r8 = 0
|
|
} else if s11r8 > 0xff {
|
|
s11r8 = 0xff
|
|
}
|
|
if s11g8 < 0 {
|
|
s11g8 = 0
|
|
} else if s11g8 > 0xff {
|
|
s11g8 = 0xff
|
|
}
|
|
if s11b8 < 0 {
|
|
s11b8 = 0
|
|
} else if s11b8 > 0xff {
|
|
s11b8 = 0xff
|
|
}
|
|
|
|
s11ru := uint32(s11r8) * 0x101
|
|
s11gu := uint32(s11g8) * 0x101
|
|
s11bu := uint32(s11b8) * 0x101
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) scale_RGBA_Image(dst *image.RGBA, dr, adr image.Rectangle, src image.Image, sr image.Rectangle) {
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = uint8(uint32(s11a) >> 8)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) scale_Image_Image(dst Image, dr, adr image.Rectangle, src image.Image, sr image.Rectangle) {
|
|
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
|
|
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()
|
|
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
|
|
dstColorRGBA64.R = uint16(s11r)
|
|
dstColorRGBA64.G = uint16(s11g)
|
|
dstColorRGBA64.B = uint16(s11b)
|
|
dstColorRGBA64.A = uint16(s11a)
|
|
dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) transform_RGBA_Gray(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.Gray, sr image.Rectangle, bias image.Point) {
|
|
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
|
|
out := uint8(uint32(s11r) >> 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(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point) {
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = uint8(uint32(s11a) >> 8)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) transform_RGBA_RGBA(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point) {
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = uint8(uint32(s11a) >> 8)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) transform_RGBA_YCbCr444(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point) {
|
|
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 func YCbCrToRGB.
|
|
s00yy1 := int(src.Y[s00i])<<16 + 1<<15
|
|
s00cb1 := int(src.Cb[s00j]) - 128
|
|
s00cr1 := int(src.Cr[s00j]) - 128
|
|
s00r8 := (s00yy1 + 91881*s00cr1) >> 16
|
|
s00g8 := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 16
|
|
s00b8 := (s00yy1 + 116130*s00cb1) >> 16
|
|
if s00r8 < 0 {
|
|
s00r8 = 0
|
|
} else if s00r8 > 0xff {
|
|
s00r8 = 0xff
|
|
}
|
|
if s00g8 < 0 {
|
|
s00g8 = 0
|
|
} else if s00g8 > 0xff {
|
|
s00g8 = 0xff
|
|
}
|
|
if s00b8 < 0 {
|
|
s00b8 = 0
|
|
} else if s00b8 > 0xff {
|
|
s00b8 = 0xff
|
|
}
|
|
|
|
s00ru := uint32(s00r8) * 0x101
|
|
s00gu := uint32(s00g8) * 0x101
|
|
s00bu := uint32(s00b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s10yy1 := int(src.Y[s10i])<<16 + 1<<15
|
|
s10cb1 := int(src.Cb[s10j]) - 128
|
|
s10cr1 := int(src.Cr[s10j]) - 128
|
|
s10r8 := (s10yy1 + 91881*s10cr1) >> 16
|
|
s10g8 := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 16
|
|
s10b8 := (s10yy1 + 116130*s10cb1) >> 16
|
|
if s10r8 < 0 {
|
|
s10r8 = 0
|
|
} else if s10r8 > 0xff {
|
|
s10r8 = 0xff
|
|
}
|
|
if s10g8 < 0 {
|
|
s10g8 = 0
|
|
} else if s10g8 > 0xff {
|
|
s10g8 = 0xff
|
|
}
|
|
if s10b8 < 0 {
|
|
s10b8 = 0
|
|
} else if s10b8 > 0xff {
|
|
s10b8 = 0xff
|
|
}
|
|
|
|
s10ru := uint32(s10r8) * 0x101
|
|
s10gu := uint32(s10g8) * 0x101
|
|
s10bu := uint32(s10b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s01yy1 := int(src.Y[s01i])<<16 + 1<<15
|
|
s01cb1 := int(src.Cb[s01j]) - 128
|
|
s01cr1 := int(src.Cr[s01j]) - 128
|
|
s01r8 := (s01yy1 + 91881*s01cr1) >> 16
|
|
s01g8 := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 16
|
|
s01b8 := (s01yy1 + 116130*s01cb1) >> 16
|
|
if s01r8 < 0 {
|
|
s01r8 = 0
|
|
} else if s01r8 > 0xff {
|
|
s01r8 = 0xff
|
|
}
|
|
if s01g8 < 0 {
|
|
s01g8 = 0
|
|
} else if s01g8 > 0xff {
|
|
s01g8 = 0xff
|
|
}
|
|
if s01b8 < 0 {
|
|
s01b8 = 0
|
|
} else if s01b8 > 0xff {
|
|
s01b8 = 0xff
|
|
}
|
|
|
|
s01ru := uint32(s01r8) * 0x101
|
|
s01gu := uint32(s01g8) * 0x101
|
|
s01bu := uint32(s01b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s11yy1 := int(src.Y[s11i])<<16 + 1<<15
|
|
s11cb1 := int(src.Cb[s11j]) - 128
|
|
s11cr1 := int(src.Cr[s11j]) - 128
|
|
s11r8 := (s11yy1 + 91881*s11cr1) >> 16
|
|
s11g8 := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 16
|
|
s11b8 := (s11yy1 + 116130*s11cb1) >> 16
|
|
if s11r8 < 0 {
|
|
s11r8 = 0
|
|
} else if s11r8 > 0xff {
|
|
s11r8 = 0xff
|
|
}
|
|
if s11g8 < 0 {
|
|
s11g8 = 0
|
|
} else if s11g8 > 0xff {
|
|
s11g8 = 0xff
|
|
}
|
|
if s11b8 < 0 {
|
|
s11b8 = 0
|
|
} else if s11b8 > 0xff {
|
|
s11b8 = 0xff
|
|
}
|
|
|
|
s11ru := uint32(s11r8) * 0x101
|
|
s11gu := uint32(s11g8) * 0x101
|
|
s11bu := uint32(s11b8) * 0x101
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) transform_RGBA_YCbCr422(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point) {
|
|
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 func YCbCrToRGB.
|
|
s00yy1 := int(src.Y[s00i])<<16 + 1<<15
|
|
s00cb1 := int(src.Cb[s00j]) - 128
|
|
s00cr1 := int(src.Cr[s00j]) - 128
|
|
s00r8 := (s00yy1 + 91881*s00cr1) >> 16
|
|
s00g8 := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 16
|
|
s00b8 := (s00yy1 + 116130*s00cb1) >> 16
|
|
if s00r8 < 0 {
|
|
s00r8 = 0
|
|
} else if s00r8 > 0xff {
|
|
s00r8 = 0xff
|
|
}
|
|
if s00g8 < 0 {
|
|
s00g8 = 0
|
|
} else if s00g8 > 0xff {
|
|
s00g8 = 0xff
|
|
}
|
|
if s00b8 < 0 {
|
|
s00b8 = 0
|
|
} else if s00b8 > 0xff {
|
|
s00b8 = 0xff
|
|
}
|
|
|
|
s00ru := uint32(s00r8) * 0x101
|
|
s00gu := uint32(s00g8) * 0x101
|
|
s00bu := uint32(s00b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s10yy1 := int(src.Y[s10i])<<16 + 1<<15
|
|
s10cb1 := int(src.Cb[s10j]) - 128
|
|
s10cr1 := int(src.Cr[s10j]) - 128
|
|
s10r8 := (s10yy1 + 91881*s10cr1) >> 16
|
|
s10g8 := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 16
|
|
s10b8 := (s10yy1 + 116130*s10cb1) >> 16
|
|
if s10r8 < 0 {
|
|
s10r8 = 0
|
|
} else if s10r8 > 0xff {
|
|
s10r8 = 0xff
|
|
}
|
|
if s10g8 < 0 {
|
|
s10g8 = 0
|
|
} else if s10g8 > 0xff {
|
|
s10g8 = 0xff
|
|
}
|
|
if s10b8 < 0 {
|
|
s10b8 = 0
|
|
} else if s10b8 > 0xff {
|
|
s10b8 = 0xff
|
|
}
|
|
|
|
s10ru := uint32(s10r8) * 0x101
|
|
s10gu := uint32(s10g8) * 0x101
|
|
s10bu := uint32(s10b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s01yy1 := int(src.Y[s01i])<<16 + 1<<15
|
|
s01cb1 := int(src.Cb[s01j]) - 128
|
|
s01cr1 := int(src.Cr[s01j]) - 128
|
|
s01r8 := (s01yy1 + 91881*s01cr1) >> 16
|
|
s01g8 := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 16
|
|
s01b8 := (s01yy1 + 116130*s01cb1) >> 16
|
|
if s01r8 < 0 {
|
|
s01r8 = 0
|
|
} else if s01r8 > 0xff {
|
|
s01r8 = 0xff
|
|
}
|
|
if s01g8 < 0 {
|
|
s01g8 = 0
|
|
} else if s01g8 > 0xff {
|
|
s01g8 = 0xff
|
|
}
|
|
if s01b8 < 0 {
|
|
s01b8 = 0
|
|
} else if s01b8 > 0xff {
|
|
s01b8 = 0xff
|
|
}
|
|
|
|
s01ru := uint32(s01r8) * 0x101
|
|
s01gu := uint32(s01g8) * 0x101
|
|
s01bu := uint32(s01b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s11yy1 := int(src.Y[s11i])<<16 + 1<<15
|
|
s11cb1 := int(src.Cb[s11j]) - 128
|
|
s11cr1 := int(src.Cr[s11j]) - 128
|
|
s11r8 := (s11yy1 + 91881*s11cr1) >> 16
|
|
s11g8 := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 16
|
|
s11b8 := (s11yy1 + 116130*s11cb1) >> 16
|
|
if s11r8 < 0 {
|
|
s11r8 = 0
|
|
} else if s11r8 > 0xff {
|
|
s11r8 = 0xff
|
|
}
|
|
if s11g8 < 0 {
|
|
s11g8 = 0
|
|
} else if s11g8 > 0xff {
|
|
s11g8 = 0xff
|
|
}
|
|
if s11b8 < 0 {
|
|
s11b8 = 0
|
|
} else if s11b8 > 0xff {
|
|
s11b8 = 0xff
|
|
}
|
|
|
|
s11ru := uint32(s11r8) * 0x101
|
|
s11gu := uint32(s11g8) * 0x101
|
|
s11bu := uint32(s11b8) * 0x101
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) transform_RGBA_YCbCr420(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point) {
|
|
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 func YCbCrToRGB.
|
|
s00yy1 := int(src.Y[s00i])<<16 + 1<<15
|
|
s00cb1 := int(src.Cb[s00j]) - 128
|
|
s00cr1 := int(src.Cr[s00j]) - 128
|
|
s00r8 := (s00yy1 + 91881*s00cr1) >> 16
|
|
s00g8 := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 16
|
|
s00b8 := (s00yy1 + 116130*s00cb1) >> 16
|
|
if s00r8 < 0 {
|
|
s00r8 = 0
|
|
} else if s00r8 > 0xff {
|
|
s00r8 = 0xff
|
|
}
|
|
if s00g8 < 0 {
|
|
s00g8 = 0
|
|
} else if s00g8 > 0xff {
|
|
s00g8 = 0xff
|
|
}
|
|
if s00b8 < 0 {
|
|
s00b8 = 0
|
|
} else if s00b8 > 0xff {
|
|
s00b8 = 0xff
|
|
}
|
|
|
|
s00ru := uint32(s00r8) * 0x101
|
|
s00gu := uint32(s00g8) * 0x101
|
|
s00bu := uint32(s00b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s10yy1 := int(src.Y[s10i])<<16 + 1<<15
|
|
s10cb1 := int(src.Cb[s10j]) - 128
|
|
s10cr1 := int(src.Cr[s10j]) - 128
|
|
s10r8 := (s10yy1 + 91881*s10cr1) >> 16
|
|
s10g8 := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 16
|
|
s10b8 := (s10yy1 + 116130*s10cb1) >> 16
|
|
if s10r8 < 0 {
|
|
s10r8 = 0
|
|
} else if s10r8 > 0xff {
|
|
s10r8 = 0xff
|
|
}
|
|
if s10g8 < 0 {
|
|
s10g8 = 0
|
|
} else if s10g8 > 0xff {
|
|
s10g8 = 0xff
|
|
}
|
|
if s10b8 < 0 {
|
|
s10b8 = 0
|
|
} else if s10b8 > 0xff {
|
|
s10b8 = 0xff
|
|
}
|
|
|
|
s10ru := uint32(s10r8) * 0x101
|
|
s10gu := uint32(s10g8) * 0x101
|
|
s10bu := uint32(s10b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s01yy1 := int(src.Y[s01i])<<16 + 1<<15
|
|
s01cb1 := int(src.Cb[s01j]) - 128
|
|
s01cr1 := int(src.Cr[s01j]) - 128
|
|
s01r8 := (s01yy1 + 91881*s01cr1) >> 16
|
|
s01g8 := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 16
|
|
s01b8 := (s01yy1 + 116130*s01cb1) >> 16
|
|
if s01r8 < 0 {
|
|
s01r8 = 0
|
|
} else if s01r8 > 0xff {
|
|
s01r8 = 0xff
|
|
}
|
|
if s01g8 < 0 {
|
|
s01g8 = 0
|
|
} else if s01g8 > 0xff {
|
|
s01g8 = 0xff
|
|
}
|
|
if s01b8 < 0 {
|
|
s01b8 = 0
|
|
} else if s01b8 > 0xff {
|
|
s01b8 = 0xff
|
|
}
|
|
|
|
s01ru := uint32(s01r8) * 0x101
|
|
s01gu := uint32(s01g8) * 0x101
|
|
s01bu := uint32(s01b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s11yy1 := int(src.Y[s11i])<<16 + 1<<15
|
|
s11cb1 := int(src.Cb[s11j]) - 128
|
|
s11cr1 := int(src.Cr[s11j]) - 128
|
|
s11r8 := (s11yy1 + 91881*s11cr1) >> 16
|
|
s11g8 := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 16
|
|
s11b8 := (s11yy1 + 116130*s11cb1) >> 16
|
|
if s11r8 < 0 {
|
|
s11r8 = 0
|
|
} else if s11r8 > 0xff {
|
|
s11r8 = 0xff
|
|
}
|
|
if s11g8 < 0 {
|
|
s11g8 = 0
|
|
} else if s11g8 > 0xff {
|
|
s11g8 = 0xff
|
|
}
|
|
if s11b8 < 0 {
|
|
s11b8 = 0
|
|
} else if s11b8 > 0xff {
|
|
s11b8 = 0xff
|
|
}
|
|
|
|
s11ru := uint32(s11r8) * 0x101
|
|
s11gu := uint32(s11g8) * 0x101
|
|
s11bu := uint32(s11b8) * 0x101
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) transform_RGBA_YCbCr440(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point) {
|
|
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 func YCbCrToRGB.
|
|
s00yy1 := int(src.Y[s00i])<<16 + 1<<15
|
|
s00cb1 := int(src.Cb[s00j]) - 128
|
|
s00cr1 := int(src.Cr[s00j]) - 128
|
|
s00r8 := (s00yy1 + 91881*s00cr1) >> 16
|
|
s00g8 := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 16
|
|
s00b8 := (s00yy1 + 116130*s00cb1) >> 16
|
|
if s00r8 < 0 {
|
|
s00r8 = 0
|
|
} else if s00r8 > 0xff {
|
|
s00r8 = 0xff
|
|
}
|
|
if s00g8 < 0 {
|
|
s00g8 = 0
|
|
} else if s00g8 > 0xff {
|
|
s00g8 = 0xff
|
|
}
|
|
if s00b8 < 0 {
|
|
s00b8 = 0
|
|
} else if s00b8 > 0xff {
|
|
s00b8 = 0xff
|
|
}
|
|
|
|
s00ru := uint32(s00r8) * 0x101
|
|
s00gu := uint32(s00g8) * 0x101
|
|
s00bu := uint32(s00b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s10yy1 := int(src.Y[s10i])<<16 + 1<<15
|
|
s10cb1 := int(src.Cb[s10j]) - 128
|
|
s10cr1 := int(src.Cr[s10j]) - 128
|
|
s10r8 := (s10yy1 + 91881*s10cr1) >> 16
|
|
s10g8 := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 16
|
|
s10b8 := (s10yy1 + 116130*s10cb1) >> 16
|
|
if s10r8 < 0 {
|
|
s10r8 = 0
|
|
} else if s10r8 > 0xff {
|
|
s10r8 = 0xff
|
|
}
|
|
if s10g8 < 0 {
|
|
s10g8 = 0
|
|
} else if s10g8 > 0xff {
|
|
s10g8 = 0xff
|
|
}
|
|
if s10b8 < 0 {
|
|
s10b8 = 0
|
|
} else if s10b8 > 0xff {
|
|
s10b8 = 0xff
|
|
}
|
|
|
|
s10ru := uint32(s10r8) * 0x101
|
|
s10gu := uint32(s10g8) * 0x101
|
|
s10bu := uint32(s10b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s01yy1 := int(src.Y[s01i])<<16 + 1<<15
|
|
s01cb1 := int(src.Cb[s01j]) - 128
|
|
s01cr1 := int(src.Cr[s01j]) - 128
|
|
s01r8 := (s01yy1 + 91881*s01cr1) >> 16
|
|
s01g8 := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 16
|
|
s01b8 := (s01yy1 + 116130*s01cb1) >> 16
|
|
if s01r8 < 0 {
|
|
s01r8 = 0
|
|
} else if s01r8 > 0xff {
|
|
s01r8 = 0xff
|
|
}
|
|
if s01g8 < 0 {
|
|
s01g8 = 0
|
|
} else if s01g8 > 0xff {
|
|
s01g8 = 0xff
|
|
}
|
|
if s01b8 < 0 {
|
|
s01b8 = 0
|
|
} else if s01b8 > 0xff {
|
|
s01b8 = 0xff
|
|
}
|
|
|
|
s01ru := uint32(s01r8) * 0x101
|
|
s01gu := uint32(s01g8) * 0x101
|
|
s01bu := uint32(s01b8) * 0x101
|
|
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 func YCbCrToRGB.
|
|
s11yy1 := int(src.Y[s11i])<<16 + 1<<15
|
|
s11cb1 := int(src.Cb[s11j]) - 128
|
|
s11cr1 := int(src.Cr[s11j]) - 128
|
|
s11r8 := (s11yy1 + 91881*s11cr1) >> 16
|
|
s11g8 := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 16
|
|
s11b8 := (s11yy1 + 116130*s11cb1) >> 16
|
|
if s11r8 < 0 {
|
|
s11r8 = 0
|
|
} else if s11r8 > 0xff {
|
|
s11r8 = 0xff
|
|
}
|
|
if s11g8 < 0 {
|
|
s11g8 = 0
|
|
} else if s11g8 > 0xff {
|
|
s11g8 = 0xff
|
|
}
|
|
if s11b8 < 0 {
|
|
s11b8 = 0
|
|
} else if s11b8 > 0xff {
|
|
s11b8 = 0xff
|
|
}
|
|
|
|
s11ru := uint32(s11r8) * 0x101
|
|
s11gu := uint32(s11g8) * 0x101
|
|
s11bu := uint32(s11b8) * 0x101
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) transform_RGBA_Image(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point) {
|
|
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
|
|
dst.Pix[d+0] = uint8(uint32(s11r) >> 8)
|
|
dst.Pix[d+1] = uint8(uint32(s11g) >> 8)
|
|
dst.Pix[d+2] = uint8(uint32(s11b) >> 8)
|
|
dst.Pix[d+3] = uint8(uint32(s11a) >> 8)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (ablInterpolator) transform_Image_Image(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point) {
|
|
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()
|
|
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
|
|
dstColorRGBA64.R = uint16(s11r)
|
|
dstColorRGBA64.G = uint16(s11g)
|
|
dstColorRGBA64.B = uint16(s11b)
|
|
dstColorRGBA64.A = uint16(s11a)
|
|
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, 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, opts)
|
|
return
|
|
}
|
|
// adr is the affected destination pixels, relative to dr.Min.
|
|
adr := dst.Bounds().Intersect(dr).Sub(dr.Min)
|
|
if adr.Empty() || sr.Empty() {
|
|
return
|
|
}
|
|
|
|
if _, ok := src.(*image.Uniform); ok && sr.In(src.Bounds()) {
|
|
// TODO: get the Op from opts.
|
|
Draw(dst, dr, src, src.Bounds().Min, Src)
|
|
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.
|
|
// TODO: is it worth having a sync.Pool for this temporary buffer?
|
|
tmp := make([][4]float64, z.dw*z.sh)
|
|
|
|
// 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.
|
|
if !sr.In(src.Bounds()) {
|
|
z.scaleX_Image(tmp, src, sr)
|
|
} else {
|
|
switch src := src.(type) {
|
|
case *image.Gray:
|
|
z.scaleX_Gray(tmp, src, sr)
|
|
case *image.NRGBA:
|
|
z.scaleX_NRGBA(tmp, src, sr)
|
|
case *image.RGBA:
|
|
z.scaleX_RGBA(tmp, src, sr)
|
|
case *image.YCbCr:
|
|
switch src.SubsampleRatio {
|
|
default:
|
|
z.scaleX_Image(tmp, src, sr)
|
|
case image.YCbCrSubsampleRatio444:
|
|
z.scaleX_YCbCr444(tmp, src, sr)
|
|
case image.YCbCrSubsampleRatio422:
|
|
z.scaleX_YCbCr422(tmp, src, sr)
|
|
case image.YCbCrSubsampleRatio420:
|
|
z.scaleX_YCbCr420(tmp, src, sr)
|
|
case image.YCbCrSubsampleRatio440:
|
|
z.scaleX_YCbCr440(tmp, src, sr)
|
|
}
|
|
default:
|
|
z.scaleX_Image(tmp, src, sr)
|
|
}
|
|
}
|
|
|
|
switch dst := dst.(type) {
|
|
case *image.RGBA:
|
|
z.scaleY_RGBA(dst, dr, adr, tmp)
|
|
default:
|
|
z.scaleY_Image(dst, dr, adr, tmp)
|
|
}
|
|
}
|
|
|
|
func (q *Kernel) Transform(dst Image, s2d *f64.Aff3, src image.Image, sr image.Rectangle, opts *Options) {
|
|
dr := transformRect(s2d, &sr)
|
|
// adr is the affected destination pixels.
|
|
adr := dst.Bounds().Intersect(dr)
|
|
if adr.Empty() || sr.Empty() {
|
|
return
|
|
}
|
|
d2s := invert(s2d)
|
|
// bias is a translation of the mapping from dst co-ordinates to
|
|
// src co-ordinates such that the latter temporarily have
|
|
// non-negative X and Y co-ordinates. 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 && sr.In(src.Bounds()) {
|
|
// TODO: get the Op from opts.
|
|
transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, Src)
|
|
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.
|
|
if !sr.In(src.Bounds()) {
|
|
q.transform_Image_Image(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
|
|
} else {
|
|
switch dst := dst.(type) {
|
|
case *image.RGBA:
|
|
switch src := src.(type) {
|
|
case *image.Gray:
|
|
q.transform_RGBA_Gray(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
|
|
case *image.NRGBA:
|
|
q.transform_RGBA_NRGBA(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
|
|
case *image.RGBA:
|
|
q.transform_RGBA_RGBA(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
|
|
case *image.YCbCr:
|
|
switch src.SubsampleRatio {
|
|
default:
|
|
q.transform_RGBA_Image(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
|
|
case image.YCbCrSubsampleRatio444:
|
|
q.transform_RGBA_YCbCr444(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
|
|
case image.YCbCrSubsampleRatio422:
|
|
q.transform_RGBA_YCbCr422(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
|
|
case image.YCbCrSubsampleRatio420:
|
|
q.transform_RGBA_YCbCr420(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
|
|
case image.YCbCrSubsampleRatio440:
|
|
q.transform_RGBA_YCbCr440(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
|
|
}
|
|
default:
|
|
q.transform_RGBA_Image(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
|
|
}
|
|
default:
|
|
switch src := src.(type) {
|
|
default:
|
|
q.transform_Image_Image(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (z *kernelScaler) scaleX_Gray(tmp [][4]float64, src *image.Gray, sr image.Rectangle) {
|
|
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) {
|
|
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) {
|
|
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) {
|
|
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 func YCbCrToRGB.
|
|
pyy1 := int(src.Y[pi])<<16 + 1<<15
|
|
pcb1 := int(src.Cb[pj]) - 128
|
|
pcr1 := int(src.Cr[pj]) - 128
|
|
pr8 := (pyy1 + 91881*pcr1) >> 16
|
|
pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
|
|
pb8 := (pyy1 + 116130*pcb1) >> 16
|
|
if pr8 < 0 {
|
|
pr8 = 0
|
|
} else if pr8 > 0xff {
|
|
pr8 = 0xff
|
|
}
|
|
if pg8 < 0 {
|
|
pg8 = 0
|
|
} else if pg8 > 0xff {
|
|
pg8 = 0xff
|
|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pru := uint32(pr8) * 0x101
|
|
pgu := uint32(pg8) * 0x101
|
|
pbu := uint32(pb8) * 0x101
|
|
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) {
|
|
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 func YCbCrToRGB.
|
|
pyy1 := int(src.Y[pi])<<16 + 1<<15
|
|
pcb1 := int(src.Cb[pj]) - 128
|
|
pcr1 := int(src.Cr[pj]) - 128
|
|
pr8 := (pyy1 + 91881*pcr1) >> 16
|
|
pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
|
|
pb8 := (pyy1 + 116130*pcb1) >> 16
|
|
if pr8 < 0 {
|
|
pr8 = 0
|
|
} else if pr8 > 0xff {
|
|
pr8 = 0xff
|
|
}
|
|
if pg8 < 0 {
|
|
pg8 = 0
|
|
} else if pg8 > 0xff {
|
|
pg8 = 0xff
|
|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pru := uint32(pr8) * 0x101
|
|
pgu := uint32(pg8) * 0x101
|
|
pbu := uint32(pb8) * 0x101
|
|
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) {
|
|
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 func YCbCrToRGB.
|
|
pyy1 := int(src.Y[pi])<<16 + 1<<15
|
|
pcb1 := int(src.Cb[pj]) - 128
|
|
pcr1 := int(src.Cr[pj]) - 128
|
|
pr8 := (pyy1 + 91881*pcr1) >> 16
|
|
pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
|
|
pb8 := (pyy1 + 116130*pcb1) >> 16
|
|
if pr8 < 0 {
|
|
pr8 = 0
|
|
} else if pr8 > 0xff {
|
|
pr8 = 0xff
|
|
}
|
|
if pg8 < 0 {
|
|
pg8 = 0
|
|
} else if pg8 > 0xff {
|
|
pg8 = 0xff
|
|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pru := uint32(pr8) * 0x101
|
|
pgu := uint32(pg8) * 0x101
|
|
pbu := uint32(pb8) * 0x101
|
|
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) {
|
|
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 func YCbCrToRGB.
|
|
pyy1 := int(src.Y[pi])<<16 + 1<<15
|
|
pcb1 := int(src.Cb[pj]) - 128
|
|
pcr1 := int(src.Cr[pj]) - 128
|
|
pr8 := (pyy1 + 91881*pcr1) >> 16
|
|
pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
|
|
pb8 := (pyy1 + 116130*pcb1) >> 16
|
|
if pr8 < 0 {
|
|
pr8 = 0
|
|
} else if pr8 > 0xff {
|
|
pr8 = 0xff
|
|
}
|
|
if pg8 < 0 {
|
|
pg8 = 0
|
|
} else if pg8 > 0xff {
|
|
pg8 = 0xff
|
|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pru := uint32(pr8) * 0x101
|
|
pgu := uint32(pg8) * 0x101
|
|
pbu := uint32(pb8) * 0x101
|
|
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) {
|
|
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] {
|
|
pru, pgu, pbu, pau := src.At(sr.Min.X+int(c.coord), sr.Min.Y+int(y)).RGBA()
|
|
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(dst *image.RGBA, dr, adr image.Rectangle, tmp [][4]float64) {
|
|
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
|
|
}
|
|
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(dst Image, dr, adr image.Rectangle, tmp [][4]float64) {
|
|
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
|
|
}
|
|
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(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.Gray, sr image.Rectangle, bias image.Point, xscale, yscale float64) {
|
|
// 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(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, xscale, yscale float64) {
|
|
// 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
|
|
}
|
|
}
|
|
}
|
|
}
|
|
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(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, xscale, yscale float64) {
|
|
// 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
|
|
}
|
|
}
|
|
}
|
|
}
|
|
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(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, xscale, yscale float64) {
|
|
// 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 func YCbCrToRGB.
|
|
pyy1 := int(src.Y[pi])<<16 + 1<<15
|
|
pcb1 := int(src.Cb[pj]) - 128
|
|
pcr1 := int(src.Cr[pj]) - 128
|
|
pr8 := (pyy1 + 91881*pcr1) >> 16
|
|
pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
|
|
pb8 := (pyy1 + 116130*pcb1) >> 16
|
|
if pr8 < 0 {
|
|
pr8 = 0
|
|
} else if pr8 > 0xff {
|
|
pr8 = 0xff
|
|
}
|
|
if pg8 < 0 {
|
|
pg8 = 0
|
|
} else if pg8 > 0xff {
|
|
pg8 = 0xff
|
|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pru := uint32(pr8) * 0x101
|
|
pgu := uint32(pg8) * 0x101
|
|
pbu := uint32(pb8) * 0x101
|
|
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(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, xscale, yscale float64) {
|
|
// 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 func YCbCrToRGB.
|
|
pyy1 := int(src.Y[pi])<<16 + 1<<15
|
|
pcb1 := int(src.Cb[pj]) - 128
|
|
pcr1 := int(src.Cr[pj]) - 128
|
|
pr8 := (pyy1 + 91881*pcr1) >> 16
|
|
pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
|
|
pb8 := (pyy1 + 116130*pcb1) >> 16
|
|
if pr8 < 0 {
|
|
pr8 = 0
|
|
} else if pr8 > 0xff {
|
|
pr8 = 0xff
|
|
}
|
|
if pg8 < 0 {
|
|
pg8 = 0
|
|
} else if pg8 > 0xff {
|
|
pg8 = 0xff
|
|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pru := uint32(pr8) * 0x101
|
|
pgu := uint32(pg8) * 0x101
|
|
pbu := uint32(pb8) * 0x101
|
|
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(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, xscale, yscale float64) {
|
|
// 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 func YCbCrToRGB.
|
|
pyy1 := int(src.Y[pi])<<16 + 1<<15
|
|
pcb1 := int(src.Cb[pj]) - 128
|
|
pcr1 := int(src.Cr[pj]) - 128
|
|
pr8 := (pyy1 + 91881*pcr1) >> 16
|
|
pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
|
|
pb8 := (pyy1 + 116130*pcb1) >> 16
|
|
if pr8 < 0 {
|
|
pr8 = 0
|
|
} else if pr8 > 0xff {
|
|
pr8 = 0xff
|
|
}
|
|
if pg8 < 0 {
|
|
pg8 = 0
|
|
} else if pg8 > 0xff {
|
|
pg8 = 0xff
|
|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pru := uint32(pr8) * 0x101
|
|
pgu := uint32(pg8) * 0x101
|
|
pbu := uint32(pb8) * 0x101
|
|
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(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, xscale, yscale float64) {
|
|
// 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 func YCbCrToRGB.
|
|
pyy1 := int(src.Y[pi])<<16 + 1<<15
|
|
pcb1 := int(src.Cb[pj]) - 128
|
|
pcr1 := int(src.Cr[pj]) - 128
|
|
pr8 := (pyy1 + 91881*pcr1) >> 16
|
|
pg8 := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 16
|
|
pb8 := (pyy1 + 116130*pcb1) >> 16
|
|
if pr8 < 0 {
|
|
pr8 = 0
|
|
} else if pr8 > 0xff {
|
|
pr8 = 0xff
|
|
}
|
|
if pg8 < 0 {
|
|
pg8 = 0
|
|
} else if pg8 > 0xff {
|
|
pg8 = 0xff
|
|
}
|
|
if pb8 < 0 {
|
|
pb8 = 0
|
|
} else if pb8 > 0xff {
|
|
pb8 = 0xff
|
|
}
|
|
|
|
pru := uint32(pr8) * 0x101
|
|
pgu := uint32(pg8) * 0x101
|
|
pbu := uint32(pb8) * 0x101
|
|
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(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, xscale, yscale float64) {
|
|
// 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
|
|
}
|
|
}
|
|
}
|
|
}
|
|
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(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, xscale, yscale float64) {
|
|
// 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)))
|
|
|
|
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()
|
|
pr += float64(pru) * w
|
|
pg += float64(pgu) * w
|
|
pb += float64(pbu) * w
|
|
pa += float64(pau) * w
|
|
}
|
|
}
|
|
}
|
|
}
|
|
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)
|
|
}
|
|
}
|
|
}
|