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impl.go
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impl.go
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// generated by "go run gen.go". DO NOT EDIT.
package draw
import (
"image"
"image/color"
"math"
"camlistore.org/third_party/golang.org/x/image/math/f64"
)
func (z nnInterpolator) Scale(dst Image, dr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
var o Options
if opts != nil {
o = *opts
}
// adr is the affected destination pixels, relative to dr.Min.
adr := dst.Bounds().Intersect(dr).Sub(dr.Min)
// TODO: clip adr to o.DstMask.Bounds().
if adr.Empty() || sr.Empty() {
return
}
if o.Op == Over && o.SrcMask == nil && opaque(src) {
o.Op = Src
}
// sr is the source pixels. If it extends beyond the src bounds,
// we cannot use the type-specific fast paths, as they access
// the Pix fields directly without bounds checking.
//
// Similarly, the fast paths assume that the masks are nil.
if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) {
switch o.Op {
case Over:
z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o)
case Src:
z.scale_Image_Image_Src(dst, dr, adr, src, sr, &o)
}
} else if _, ok := src.(*image.Uniform); ok {
Draw(dst, dr, src, src.Bounds().Min, o.Op)
} else {
switch o.Op {
case Over:
switch dst := dst.(type) {
case *image.RGBA:
switch src := src.(type) {
case *image.NRGBA:
z.scale_RGBA_NRGBA_Over(dst, dr, adr, src, sr, &o)
case *image.RGBA:
z.scale_RGBA_RGBA_Over(dst, dr, adr, src, sr, &o)
default:
z.scale_RGBA_Image_Over(dst, dr, adr, src, sr, &o)
}
default:
switch src := src.(type) {
default:
z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o)
}
}
case Src:
switch dst := dst.(type) {
case *image.RGBA:
switch src := src.(type) {
case *image.Gray:
z.scale_RGBA_Gray_Src(dst, dr, adr, src, sr, &o)
case *image.NRGBA:
z.scale_RGBA_NRGBA_Src(dst, dr, adr, src, sr, &o)
case *image.RGBA:
z.scale_RGBA_RGBA_Src(dst, dr, adr, src, sr, &o)
case *image.YCbCr:
switch src.SubsampleRatio {
default:
z.scale_RGBA_Image_Src(dst, dr, adr, src, sr, &o)
case image.YCbCrSubsampleRatio444:
z.scale_RGBA_YCbCr444_Src(dst, dr, adr, src, sr, &o)
case image.YCbCrSubsampleRatio422:
z.scale_RGBA_YCbCr422_Src(dst, dr, adr, src, sr, &o)
case image.YCbCrSubsampleRatio420:
z.scale_RGBA_YCbCr420_Src(dst, dr, adr, src, sr, &o)
case image.YCbCrSubsampleRatio440:
z.scale_RGBA_YCbCr440_Src(dst, dr, adr, src, sr, &o)
}
default:
z.scale_RGBA_Image_Src(dst, dr, adr, src, sr, &o)
}
default:
switch src := src.(type) {
default:
z.scale_Image_Image_Src(dst, dr, adr, src, sr, &o)
}
}
}
}
}
func (z nnInterpolator) Transform(dst Image, s2d *f64.Aff3, src image.Image, sr image.Rectangle, opts *Options) {
var o Options
if opts != nil {
o = *opts
}
dr := transformRect(s2d, &sr)
// adr is the affected destination pixels.
adr := dst.Bounds().Intersect(dr)
// TODO: clip adr to o.DstMask.Bounds().
if adr.Empty() || sr.Empty() {
return
}
if o.Op == Over && o.SrcMask == nil && opaque(src) {
o.Op = Src
}
d2s := invert(s2d)
// bias is a translation of the mapping from dst coordinates to src
// coordinates such that the latter temporarily have non-negative X
// and Y coordinates. This allows us to write int(f) instead of
// int(math.Floor(f)), since "round to zero" and "round down" are
// equivalent when f >= 0, but the former is much cheaper. The X--
// and Y-- are because the TransformLeaf methods have a "sx -= 0.5"
// adjustment.
bias := transformRect(&d2s, &adr).Min
bias.X--
bias.Y--
d2s[2] -= float64(bias.X)
d2s[5] -= float64(bias.Y)
// Make adr relative to dr.Min.
adr = adr.Sub(dr.Min)
// sr is the source pixels. If it extends beyond the src bounds,
// we cannot use the type-specific fast paths, as they access
// the Pix fields directly without bounds checking.
//
// Similarly, the fast paths assume that the masks are nil.
if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) {
switch o.Op {
case Over:
z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
case Src:
z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
}
} else if u, ok := src.(*image.Uniform); ok {
transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, o.Op)
} else {
switch o.Op {
case Over:
switch dst := dst.(type) {
case *image.RGBA:
switch src := src.(type) {
case *image.NRGBA:
z.transform_RGBA_NRGBA_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
case *image.RGBA:
z.transform_RGBA_RGBA_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
default:
z.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
}
default:
switch src := src.(type) {
default:
z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, &o)
}
}
case Src:
switch dst := dst.(type) {
case *image.RGBA:
switch src := src.(type) {
case *image.Gray:
z.transform_RGBA_Gray_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
case *image.NRGBA:
z.transform_RGBA_NRGBA_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
case *image.RGBA:
z.transform_RGBA_RGBA_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
case *image.YCbCr:
switch src.SubsampleRatio {
default:
z.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
case image.YCbCrSubsampleRatio444:
z.transform_RGBA_YCbCr444_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
case image.YCbCrSubsampleRatio422:
z.transform_RGBA_YCbCr422_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
case image.YCbCrSubsampleRatio420:
z.transform_RGBA_YCbCr420_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
case image.YCbCrSubsampleRatio440:
z.transform_RGBA_YCbCr440_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
}
default:
z.transform_RGBA_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
}
default:
switch src := src.(type) {
default:
z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, &o)
}
}
}
}
}
func (nnInterpolator) scale_RGBA_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.Gray, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
sy := (2*uint64(dy) + 1) * sh / dh2
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
sx := (2*uint64(dx) + 1) * sw / dw2
pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X + int(sx) - src.Rect.Min.X)
pr := uint32(src.Pix[pi]) * 0x101
out := uint8(pr >> 8)
dst.Pix[d+0] = out
dst.Pix[d+1] = out
dst.Pix[d+2] = out
dst.Pix[d+3] = 0xff
}
}
}
func (nnInterpolator) scale_RGBA_NRGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.NRGBA, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
sy := (2*uint64(dy) + 1) * sh / dh2
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
sx := (2*uint64(dx) + 1) * sw / dw2
pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4
pa := uint32(src.Pix[pi+3]) * 0x101
pr := uint32(src.Pix[pi+0]) * pa / 0xff
pg := uint32(src.Pix[pi+1]) * pa / 0xff
pb := uint32(src.Pix[pi+2]) * pa / 0xff
pa1 := (0xffff - pa) * 0x101
dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
}
}
}
func (nnInterpolator) scale_RGBA_NRGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.NRGBA, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
sy := (2*uint64(dy) + 1) * sh / dh2
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
sx := (2*uint64(dx) + 1) * sw / dw2
pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4
pa := uint32(src.Pix[pi+3]) * 0x101
pr := uint32(src.Pix[pi+0]) * pa / 0xff
pg := uint32(src.Pix[pi+1]) * pa / 0xff
pb := uint32(src.Pix[pi+2]) * pa / 0xff
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = uint8(pa >> 8)
}
}
}
func (nnInterpolator) scale_RGBA_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.RGBA, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
sy := (2*uint64(dy) + 1) * sh / dh2
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
sx := (2*uint64(dx) + 1) * sw / dw2
pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4
pr := uint32(src.Pix[pi+0]) * 0x101
pg := uint32(src.Pix[pi+1]) * 0x101
pb := uint32(src.Pix[pi+2]) * 0x101
pa := uint32(src.Pix[pi+3]) * 0x101
pa1 := (0xffff - pa) * 0x101
dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
}
}
}
func (nnInterpolator) scale_RGBA_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.RGBA, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
sy := (2*uint64(dy) + 1) * sh / dh2
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
sx := (2*uint64(dx) + 1) * sw / dw2
pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.Stride + (sr.Min.X+int(sx)-src.Rect.Min.X)*4
pr := uint32(src.Pix[pi+0]) * 0x101
pg := uint32(src.Pix[pi+1]) * 0x101
pb := uint32(src.Pix[pi+2]) * 0x101
pa := uint32(src.Pix[pi+3]) * 0x101
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = uint8(pa >> 8)
}
}
}
func (nnInterpolator) scale_RGBA_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
sy := (2*uint64(dy) + 1) * sh / dh2
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
sx := (2*uint64(dx) + 1) * sw / dw2
pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
pj := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
// This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
pyy1 := int(src.Y[pi])<<16 + 1<<15
pcb1 := int(src.Cb[pj]) - 128
pcr1 := int(src.Cr[pj]) - 128
pr := (pyy1 + 91881*pcr1) >> 8
pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
pb := (pyy1 + 116130*pcb1) >> 8
if pr < 0 {
pr = 0
} else if pr > 0xffff {
pr = 0xffff
}
if pg < 0 {
pg = 0
} else if pg > 0xffff {
pg = 0xffff
}
if pb < 0 {
pb = 0
} else if pb > 0xffff {
pb = 0xffff
}
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = 0xff
}
}
}
func (nnInterpolator) scale_RGBA_YCbCr422_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
sy := (2*uint64(dy) + 1) * sh / dh2
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
sx := (2*uint64(dx) + 1) * sw / dw2
pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
pj := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx))/2 - src.Rect.Min.X/2)
// This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
pyy1 := int(src.Y[pi])<<16 + 1<<15
pcb1 := int(src.Cb[pj]) - 128
pcr1 := int(src.Cr[pj]) - 128
pr := (pyy1 + 91881*pcr1) >> 8
pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
pb := (pyy1 + 116130*pcb1) >> 8
if pr < 0 {
pr = 0
} else if pr > 0xffff {
pr = 0xffff
}
if pg < 0 {
pg = 0
} else if pg > 0xffff {
pg = 0xffff
}
if pb < 0 {
pb = 0
} else if pb > 0xffff {
pb = 0xffff
}
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = 0xff
}
}
}
func (nnInterpolator) scale_RGBA_YCbCr420_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
sy := (2*uint64(dy) + 1) * sh / dh2
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
sx := (2*uint64(dx) + 1) * sw / dw2
pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
pj := ((sr.Min.Y+int(sy))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx))/2 - src.Rect.Min.X/2)
// This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
pyy1 := int(src.Y[pi])<<16 + 1<<15
pcb1 := int(src.Cb[pj]) - 128
pcr1 := int(src.Cr[pj]) - 128
pr := (pyy1 + 91881*pcr1) >> 8
pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
pb := (pyy1 + 116130*pcb1) >> 8
if pr < 0 {
pr = 0
} else if pr > 0xffff {
pr = 0xffff
}
if pg < 0 {
pg = 0
} else if pg > 0xffff {
pg = 0xffff
}
if pb < 0 {
pb = 0
} else if pb > 0xffff {
pb = 0xffff
}
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = 0xff
}
}
}
func (nnInterpolator) scale_RGBA_YCbCr440_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
sy := (2*uint64(dy) + 1) * sh / dh2
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
sx := (2*uint64(dx) + 1) * sw / dw2
pi := (sr.Min.Y+int(sy)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
pj := ((sr.Min.Y+int(sy))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx) - src.Rect.Min.X)
// This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
pyy1 := int(src.Y[pi])<<16 + 1<<15
pcb1 := int(src.Cb[pj]) - 128
pcr1 := int(src.Cr[pj]) - 128
pr := (pyy1 + 91881*pcr1) >> 8
pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
pb := (pyy1 + 116130*pcb1) >> 8
if pr < 0 {
pr = 0
} else if pr > 0xffff {
pr = 0xffff
}
if pg < 0 {
pg = 0
} else if pg > 0xffff {
pg = 0xffff
}
if pb < 0 {
pb = 0
} else if pb > 0xffff {
pb = 0xffff
}
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = 0xff
}
}
}
func (nnInterpolator) scale_RGBA_Image_Over(dst *image.RGBA, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
sy := (2*uint64(dy) + 1) * sh / dh2
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
sx := (2*uint64(dx) + 1) * sw / dw2
pr, pg, pb, pa := src.At(sr.Min.X+int(sx), sr.Min.Y+int(sy)).RGBA()
pa1 := (0xffff - pa) * 0x101
dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
}
}
}
func (nnInterpolator) scale_RGBA_Image_Src(dst *image.RGBA, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
sy := (2*uint64(dy) + 1) * sh / dh2
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
sx := (2*uint64(dx) + 1) * sw / dw2
pr, pg, pb, pa := src.At(sr.Min.X+int(sx), sr.Min.Y+int(sy)).RGBA()
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = uint8(pa >> 8)
}
}
}
func (nnInterpolator) scale_Image_Image_Over(dst Image, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
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()
qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
pa1 := 0xffff - pa
dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
}
}
}
func (nnInterpolator) scale_Image_Image_Src(dst Image, dr, adr image.Rectangle, src image.Image, sr image.Rectangle, opts *Options) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
sw := uint64(sr.Dx())
sh := uint64(sr.Dy())
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_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.Gray, sr image.Rectangle, bias image.Point, opts *Options) {
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
dyf := float64(dr.Min.Y+int(dy)) + 0.5
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
dxf := float64(dr.Min.X+int(dx)) + 0.5
sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
if !(image.Point{sx0, sy0}).In(sr) {
continue
}
pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0 - src.Rect.Min.X)
pr := uint32(src.Pix[pi]) * 0x101
out := uint8(pr >> 8)
dst.Pix[d+0] = out
dst.Pix[d+1] = out
dst.Pix[d+2] = out
dst.Pix[d+3] = 0xff
}
}
}
func (nnInterpolator) transform_RGBA_NRGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, opts *Options) {
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
dyf := float64(dr.Min.Y+int(dy)) + 0.5
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
dxf := float64(dr.Min.X+int(dx)) + 0.5
sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
if !(image.Point{sx0, sy0}).In(sr) {
continue
}
pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
pa := uint32(src.Pix[pi+3]) * 0x101
pr := uint32(src.Pix[pi+0]) * pa / 0xff
pg := uint32(src.Pix[pi+1]) * pa / 0xff
pb := uint32(src.Pix[pi+2]) * pa / 0xff
pa1 := (0xffff - pa) * 0x101
dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
}
}
}
func (nnInterpolator) transform_RGBA_NRGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.NRGBA, sr image.Rectangle, bias image.Point, opts *Options) {
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
dyf := float64(dr.Min.Y+int(dy)) + 0.5
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
dxf := float64(dr.Min.X+int(dx)) + 0.5
sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
if !(image.Point{sx0, sy0}).In(sr) {
continue
}
pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
pa := uint32(src.Pix[pi+3]) * 0x101
pr := uint32(src.Pix[pi+0]) * pa / 0xff
pg := uint32(src.Pix[pi+1]) * pa / 0xff
pb := uint32(src.Pix[pi+2]) * pa / 0xff
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = uint8(pa >> 8)
}
}
}
func (nnInterpolator) transform_RGBA_RGBA_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, opts *Options) {
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
dyf := float64(dr.Min.Y+int(dy)) + 0.5
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
dxf := float64(dr.Min.X+int(dx)) + 0.5
sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
if !(image.Point{sx0, sy0}).In(sr) {
continue
}
pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
pr := uint32(src.Pix[pi+0]) * 0x101
pg := uint32(src.Pix[pi+1]) * 0x101
pb := uint32(src.Pix[pi+2]) * 0x101
pa := uint32(src.Pix[pi+3]) * 0x101
pa1 := (0xffff - pa) * 0x101
dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
}
}
}
func (nnInterpolator) transform_RGBA_RGBA_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.RGBA, sr image.Rectangle, bias image.Point, opts *Options) {
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
dyf := float64(dr.Min.Y+int(dy)) + 0.5
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
dxf := float64(dr.Min.X+int(dx)) + 0.5
sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
if !(image.Point{sx0, sy0}).In(sr) {
continue
}
pi := (sy0-src.Rect.Min.Y)*src.Stride + (sx0-src.Rect.Min.X)*4
pr := uint32(src.Pix[pi+0]) * 0x101
pg := uint32(src.Pix[pi+1]) * 0x101
pb := uint32(src.Pix[pi+2]) * 0x101
pa := uint32(src.Pix[pi+3]) * 0x101
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = uint8(pa >> 8)
}
}
}
func (nnInterpolator) transform_RGBA_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) {
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
dyf := float64(dr.Min.Y+int(dy)) + 0.5
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
dxf := float64(dr.Min.X+int(dx)) + 0.5
sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
if !(image.Point{sx0, sy0}).In(sr) {
continue
}
pi := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
pj := (sy0-src.Rect.Min.Y)*src.CStride + (sx0 - src.Rect.Min.X)
// This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
pyy1 := int(src.Y[pi])<<16 + 1<<15
pcb1 := int(src.Cb[pj]) - 128
pcr1 := int(src.Cr[pj]) - 128
pr := (pyy1 + 91881*pcr1) >> 8
pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
pb := (pyy1 + 116130*pcb1) >> 8
if pr < 0 {
pr = 0
} else if pr > 0xffff {
pr = 0xffff
}
if pg < 0 {
pg = 0
} else if pg > 0xffff {
pg = 0xffff
}
if pb < 0 {
pb = 0
} else if pb > 0xffff {
pb = 0xffff
}
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = 0xff
}
}
}
func (nnInterpolator) transform_RGBA_YCbCr422_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) {
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
dyf := float64(dr.Min.Y+int(dy)) + 0.5
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
dxf := float64(dr.Min.X+int(dx)) + 0.5
sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
if !(image.Point{sx0, sy0}).In(sr) {
continue
}
pi := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
pj := (sy0-src.Rect.Min.Y)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2)
// This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
pyy1 := int(src.Y[pi])<<16 + 1<<15
pcb1 := int(src.Cb[pj]) - 128
pcr1 := int(src.Cr[pj]) - 128
pr := (pyy1 + 91881*pcr1) >> 8
pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
pb := (pyy1 + 116130*pcb1) >> 8
if pr < 0 {
pr = 0
} else if pr > 0xffff {
pr = 0xffff
}
if pg < 0 {
pg = 0
} else if pg > 0xffff {
pg = 0xffff
}
if pb < 0 {
pb = 0
} else if pb > 0xffff {
pb = 0xffff
}
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = 0xff
}
}
}
func (nnInterpolator) transform_RGBA_YCbCr420_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) {
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
dyf := float64(dr.Min.Y+int(dy)) + 0.5
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
dxf := float64(dr.Min.X+int(dx)) + 0.5
sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
if !(image.Point{sx0, sy0}).In(sr) {
continue
}
pi := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
pj := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2)
// This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
pyy1 := int(src.Y[pi])<<16 + 1<<15
pcb1 := int(src.Cb[pj]) - 128
pcr1 := int(src.Cr[pj]) - 128
pr := (pyy1 + 91881*pcr1) >> 8
pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
pb := (pyy1 + 116130*pcb1) >> 8
if pr < 0 {
pr = 0
} else if pr > 0xffff {
pr = 0xffff
}
if pg < 0 {
pg = 0
} else if pg > 0xffff {
pg = 0xffff
}
if pb < 0 {
pb = 0
} else if pb > 0xffff {
pb = 0xffff
}
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = 0xff
}
}
}
func (nnInterpolator) transform_RGBA_YCbCr440_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src *image.YCbCr, sr image.Rectangle, bias image.Point, opts *Options) {
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
dyf := float64(dr.Min.Y+int(dy)) + 0.5
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
dxf := float64(dr.Min.X+int(dx)) + 0.5
sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
if !(image.Point{sx0, sy0}).In(sr) {
continue
}
pi := (sy0-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
pj := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + (sx0 - src.Rect.Min.X)
// This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
pyy1 := int(src.Y[pi])<<16 + 1<<15
pcb1 := int(src.Cb[pj]) - 128
pcr1 := int(src.Cr[pj]) - 128
pr := (pyy1 + 91881*pcr1) >> 8
pg := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
pb := (pyy1 + 116130*pcb1) >> 8
if pr < 0 {
pr = 0
} else if pr > 0xffff {
pr = 0xffff
}
if pg < 0 {
pg = 0
} else if pg > 0xffff {
pg = 0xffff
}
if pb < 0 {
pb = 0
} else if pb > 0xffff {
pb = 0xffff
}
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = 0xff
}
}
}
func (nnInterpolator) transform_RGBA_Image_Over(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) {
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
dyf := float64(dr.Min.Y+int(dy)) + 0.5
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
dxf := float64(dr.Min.X+int(dx)) + 0.5
sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
if !(image.Point{sx0, sy0}).In(sr) {
continue
}
pr, pg, pb, pa := src.At(sx0, sy0).RGBA()
pa1 := (0xffff - pa) * 0x101
dst.Pix[d+0] = uint8((uint32(dst.Pix[d+0])*pa1/0xffff + pr) >> 8)
dst.Pix[d+1] = uint8((uint32(dst.Pix[d+1])*pa1/0xffff + pg) >> 8)
dst.Pix[d+2] = uint8((uint32(dst.Pix[d+2])*pa1/0xffff + pb) >> 8)
dst.Pix[d+3] = uint8((uint32(dst.Pix[d+3])*pa1/0xffff + pa) >> 8)
}
}
}
func (nnInterpolator) transform_RGBA_Image_Src(dst *image.RGBA, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) {
for dy := int32(adr.Min.Y); dy < int32(adr.Max.Y); dy++ {
dyf := float64(dr.Min.Y+int(dy)) + 0.5
d := (dr.Min.Y+int(dy)-dst.Rect.Min.Y)*dst.Stride + (dr.Min.X+adr.Min.X-dst.Rect.Min.X)*4
for dx := int32(adr.Min.X); dx < int32(adr.Max.X); dx, d = dx+1, d+4 {
dxf := float64(dr.Min.X+int(dx)) + 0.5
sx0 := int(d2s[0]*dxf+d2s[1]*dyf+d2s[2]) + bias.X
sy0 := int(d2s[3]*dxf+d2s[4]*dyf+d2s[5]) + bias.Y
if !(image.Point{sx0, sy0}).In(sr) {
continue
}
pr, pg, pb, pa := src.At(sx0, sy0).RGBA()
dst.Pix[d+0] = uint8(pr >> 8)
dst.Pix[d+1] = uint8(pg >> 8)
dst.Pix[d+2] = uint8(pb >> 8)
dst.Pix[d+3] = uint8(pa >> 8)
}
}
}
func (nnInterpolator) transform_Image_Image_Over(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) {
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()
qr, qg, qb, qa := dst.At(dr.Min.X+int(dx), dr.Min.Y+int(dy)).RGBA()
pa1 := 0xffff - pa
dstColorRGBA64.R = uint16(qr*pa1/0xffff + pr)
dstColorRGBA64.G = uint16(qg*pa1/0xffff + pg)
dstColorRGBA64.B = uint16(qb*pa1/0xffff + pb)
dstColorRGBA64.A = uint16(qa*pa1/0xffff + pa)
dst.Set(dr.Min.X+int(dx), dr.Min.Y+int(dy), dstColor)
}
}
}
func (nnInterpolator) transform_Image_Image_Src(dst Image, dr, adr image.Rectangle, d2s *f64.Aff3, src image.Image, sr image.Rectangle, bias image.Point, opts *Options) {
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) {
var o Options
if opts != nil {
o = *opts
}
// adr is the affected destination pixels, relative to dr.Min.
adr := dst.Bounds().Intersect(dr).Sub(dr.Min)
// TODO: clip adr to o.DstMask.Bounds().
if adr.Empty() || sr.Empty() {
return
}
if o.Op == Over && o.SrcMask == nil && opaque(src) {
o.Op = Src
}
// sr is the source pixels. If it extends beyond the src bounds,
// we cannot use the type-specific fast paths, as they access
// the Pix fields directly without bounds checking.
//
// Similarly, the fast paths assume that the masks are nil.
if o.DstMask != nil || o.SrcMask != nil || !sr.In(src.Bounds()) {
switch o.Op {
case Over:
z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o)
case Src:
z.scale_Image_Image_Src(dst, dr, adr, src, sr, &o)
}
} else if _, ok := src.(*image.Uniform); ok {
Draw(dst, dr, src, src.Bounds().Min, o.Op)
} else {
switch o.Op {
case Over:
switch dst := dst.(type) {
case *image.RGBA:
switch src := src.(type) {
case *image.NRGBA:
z.scale_RGBA_NRGBA_Over(dst, dr, adr, src, sr, &o)
case *image.RGBA:
z.scale_RGBA_RGBA_Over(dst, dr, adr, src, sr, &o)
default:
z.scale_RGBA_Image_Over(dst, dr, adr, src, sr, &o)
}
default:
switch src := src.(type) {
default:
z.scale_Image_Image_Over(dst, dr, adr, src, sr, &o)
}
}