draw: substitute Src for Over when the source image is completely opaque.
The two Ops are equivalent, but Src is faster.
Change-Id: I2c73a13755047c224c71fb5af786875f02681de9
Reviewed-on: https://go-review.googlesource.com/8640
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/draw/gen.go b/draw/gen.go
index 658270e..1e335e0 100644
--- a/draw/gen.go
+++ b/draw/gen.go
@@ -55,6 +55,7 @@
// should be the fallback pair ("Image", "image.Image").
//
// TODO: add *image.CMYK src type after Go 1.5 is released.
+ // An *image.CMYK is also alwaysOpaque.
dsTypes = []struct{ dType, sType string }{
{"*image.RGBA", "*image.Gray"},
{"*image.RGBA", "*image.NRGBA"},
@@ -72,6 +73,13 @@
"440",
}
ops = []string{"Over", "Src"}
+ // alwaysOpaque are those image.Image implementations that are always
+ // opaque. For these types, Over is equivalent to the faster Src, in the
+ // absence of a source mask.
+ alwaysOpaque = map[string]bool{
+ "*image.Gray": true,
+ "*image.YCbCr": true,
+ }
)
func init() {
@@ -104,6 +112,9 @@
for _, code := range codes {
for _, t := range dsTypes {
for _, op := range ops {
+ if op == "Over" && alwaysOpaque[t.sType] {
+ continue
+ }
expn(w, code, &data{
dType: t.dType,
sType: t.sType,
@@ -132,6 +143,9 @@
}
for _, t := range dsTypes {
for _, op := range ops {
+ if op == "Over" && alwaysOpaque[t.sType] {
+ continue
+ }
expn(w, codeKernelTransformLeaf, &data{
dType: t.dType,
sType: t.sType,
@@ -585,7 +599,7 @@
func expnSwitch(op, dType string, expandBoth bool, template string) string {
if op == "" && dType != "anyDType" {
- lines := []string{"switch opts.op() {"}
+ lines := []string{"switch op {"}
for _, op = range ops {
lines = append(lines,
fmt.Sprintf("case %s:", op),
@@ -607,6 +621,14 @@
fallback, values = "image.Image", sTypesForDType[dType]
}
for _, v := range values {
+ if dType != "" {
+ // v is the sType. Skip those always-opaque sTypes, where Over is
+ // equivalent to Src.
+ if op == "Over" && alwaysOpaque[v] {
+ continue
+ }
+ }
+
if v == fallback {
lines = append(lines, "default:")
} else {
@@ -745,18 +767,22 @@
if adr.Empty() || sr.Empty() {
return
}
+ op := opts.op()
+ if op == Over && opaque(src) { // TODO: also check that opts.SrcMask == nil.
+ 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.
if !sr.In(src.Bounds()) {
- switch opts.op() {
+ switch op {
case Over:
z.scale_Image_Image_Over(dst, dr, adr, src, sr)
case Src:
z.scale_Image_Image_Src(dst, dr, adr, src, sr)
}
} else if _, ok := src.(*image.Uniform); ok {
- Draw(dst, dr, src, src.Bounds().Min, opts.op())
+ Draw(dst, dr, src, src.Bounds().Min, op)
} else {
$switch z.scale_$dTypeRN_$sTypeRN$sratio_$op(dst, dr, adr, src, sr)
}
@@ -769,6 +795,10 @@
if adr.Empty() || sr.Empty() {
return
}
+ op := opts.op()
+ if op == Over && opaque(src) { // TODO: also check that opts.SrcMask == nil.
+ op = Src
+ }
d2s := invert(s2d)
// bias is a translation of the mapping from dst co-ordinates to
// src co-ordinates such that the latter temporarily have
@@ -788,14 +818,14 @@
// we cannot use the type-specific fast paths, as they access
// the Pix fields directly without bounds checking.
if !sr.In(src.Bounds()) {
- switch opts.op() {
+ switch op {
case Over:
z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias)
case Src:
z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias)
}
} else if u, ok := src.(*image.Uniform); ok {
- transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, opts.op())
+ transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op)
} else {
$switch z.transform_$dTypeRN_$sTypeRN$sratio_$op(dst, dr, adr, &d2s, src, sr, bias)
}
@@ -961,9 +991,13 @@
if adr.Empty() || sr.Empty() {
return
}
+ op := opts.op()
+ if op == Over && opaque(src) { // TODO: also check that opts.SrcMask == nil.
+ op = Src
+ }
if _, ok := src.(*image.Uniform); ok && sr.In(src.Bounds()) {
- Draw(dst, dr, src, src.Bounds().Min, opts.op())
+ Draw(dst, dr, src, src.Bounds().Min, op)
return
}
@@ -998,6 +1032,10 @@
if adr.Empty() || sr.Empty() {
return
}
+ op := opts.op()
+ if op == Over && opaque(src) { // TODO: also check that opts.SrcMask == nil.
+ op = Src
+ }
d2s := invert(s2d)
// bias is a translation of the mapping from dst co-ordinates to
// src co-ordinates such that the latter temporarily have
@@ -1015,7 +1053,7 @@
adr = adr.Sub(dr.Min)
if u, ok := src.(*image.Uniform); ok && sr.In(src.Bounds()) {
- transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, opts.op())
+ transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op)
return
}
@@ -1032,7 +1070,7 @@
// we cannot use the type-specific fast paths, as they access
// the Pix fields directly without bounds checking.
if !sr.In(src.Bounds()) {
- switch opts.op() {
+ switch op {
case Over:
q.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
case Src:
diff --git a/draw/impl.go b/draw/impl.go
index efe65d2..8fed0bd 100644
--- a/draw/impl.go
+++ b/draw/impl.go
@@ -16,43 +16,32 @@
if adr.Empty() || sr.Empty() {
return
}
+ op := opts.op()
+ if op == Over && opaque(src) { // TODO: also check that opts.SrcMask == nil.
+ 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.
if !sr.In(src.Bounds()) {
- switch opts.op() {
+ switch op {
case Over:
z.scale_Image_Image_Over(dst, dr, adr, src, sr)
case Src:
z.scale_Image_Image_Src(dst, dr, adr, src, sr)
}
} else if _, ok := src.(*image.Uniform); ok {
- Draw(dst, dr, src, src.Bounds().Min, opts.op())
+ Draw(dst, dr, src, src.Bounds().Min, op)
} else {
- switch opts.op() {
+ switch op {
case Over:
switch dst := dst.(type) {
case *image.RGBA:
switch src := src.(type) {
- case *image.Gray:
- z.scale_RGBA_Gray_Over(dst, dr, adr, src, sr)
case *image.NRGBA:
z.scale_RGBA_NRGBA_Over(dst, dr, adr, src, sr)
case *image.RGBA:
z.scale_RGBA_RGBA_Over(dst, dr, adr, src, sr)
- case *image.YCbCr:
- switch src.SubsampleRatio {
- default:
- z.scale_RGBA_Image_Over(dst, dr, adr, src, sr)
- case image.YCbCrSubsampleRatio444:
- z.scale_RGBA_YCbCr444_Over(dst, dr, adr, src, sr)
- case image.YCbCrSubsampleRatio422:
- z.scale_RGBA_YCbCr422_Over(dst, dr, adr, src, sr)
- case image.YCbCrSubsampleRatio420:
- z.scale_RGBA_YCbCr420_Over(dst, dr, adr, src, sr)
- case image.YCbCrSubsampleRatio440:
- z.scale_RGBA_YCbCr440_Over(dst, dr, adr, src, sr)
- }
default:
z.scale_RGBA_Image_Over(dst, dr, adr, src, sr)
}
@@ -105,6 +94,10 @@
if adr.Empty() || sr.Empty() {
return
}
+ op := opts.op()
+ if op == Over && opaque(src) { // TODO: also check that opts.SrcMask == nil.
+ op = Src
+ }
d2s := invert(s2d)
// bias is a translation of the mapping from dst co-ordinates to
// src co-ordinates such that the latter temporarily have
@@ -124,39 +117,24 @@
// we cannot use the type-specific fast paths, as they access
// the Pix fields directly without bounds checking.
if !sr.In(src.Bounds()) {
- switch opts.op() {
+ switch op {
case Over:
z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias)
case Src:
z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias)
}
} else if u, ok := src.(*image.Uniform); ok {
- transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, opts.op())
+ transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op)
} else {
- switch opts.op() {
+ switch op {
case Over:
switch dst := dst.(type) {
case *image.RGBA:
switch src := src.(type) {
- case *image.Gray:
- z.transform_RGBA_Gray_Over(dst, dr, adr, &d2s, src, sr, bias)
case *image.NRGBA:
z.transform_RGBA_NRGBA_Over(dst, dr, adr, &d2s, src, sr, bias)
case *image.RGBA:
z.transform_RGBA_RGBA_Over(dst, dr, adr, &d2s, src, sr, bias)
- case *image.YCbCr:
- switch src.SubsampleRatio {
- default:
- z.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias)
- case image.YCbCrSubsampleRatio444:
- z.transform_RGBA_YCbCr444_Over(dst, dr, adr, &d2s, src, sr, bias)
- case image.YCbCrSubsampleRatio422:
- z.transform_RGBA_YCbCr422_Over(dst, dr, adr, &d2s, src, sr, bias)
- case image.YCbCrSubsampleRatio420:
- z.transform_RGBA_YCbCr420_Over(dst, dr, adr, &d2s, src, sr, bias)
- case image.YCbCrSubsampleRatio440:
- z.transform_RGBA_YCbCr440_Over(dst, dr, adr, &d2s, src, sr, bias)
- }
default:
z.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias)
}
@@ -202,27 +180,6 @@
}
}
-func (nnInterpolator) scale_RGBA_Gray_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.Gray, 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
- 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(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) scale_RGBA_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.Gray, sr image.Rectangle) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
@@ -336,178 +293,6 @@
}
}
-func (nnInterpolator) scale_RGBA_YCbCr444_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, 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
- 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(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_YCbCr422_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, 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
- 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(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_YCbCr420_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, 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
- 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(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_YCbCr440_Over(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, 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
- 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(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_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle) {
dw2 := uint64(dr.Dx()) * 2
dh2 := uint64(dr.Dy()) * 2
@@ -760,28 +545,6 @@
}
}
-func (nnInterpolator) transform_RGBA_Gray_Over(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_Gray_Src(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
@@ -900,182 +663,6 @@
}
}
-func (nnInterpolator) transform_RGBA_YCbCr444_Over(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 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(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_Over(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 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(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_Over(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 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(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_Over(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 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(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_YCbCr444_Src(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
@@ -1342,43 +929,32 @@
if adr.Empty() || sr.Empty() {
return
}
+ op := opts.op()
+ if op == Over && opaque(src) { // TODO: also check that opts.SrcMask == nil.
+ 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.
if !sr.In(src.Bounds()) {
- switch opts.op() {
+ switch op {
case Over:
z.scale_Image_Image_Over(dst, dr, adr, src, sr)
case Src:
z.scale_Image_Image_Src(dst, dr, adr, src, sr)
}
} else if _, ok := src.(*image.Uniform); ok {
- Draw(dst, dr, src, src.Bounds().Min, opts.op())
+ Draw(dst, dr, src, src.Bounds().Min, op)
} else {
- switch opts.op() {
+ switch op {
case Over:
switch dst := dst.(type) {
case *image.RGBA:
switch src := src.(type) {
- case *image.Gray:
- z.scale_RGBA_Gray_Over(dst, dr, adr, src, sr)
case *image.NRGBA:
z.scale_RGBA_NRGBA_Over(dst, dr, adr, src, sr)
case *image.RGBA:
z.scale_RGBA_RGBA_Over(dst, dr, adr, src, sr)
- case *image.YCbCr:
- switch src.SubsampleRatio {
- default:
- z.scale_RGBA_Image_Over(dst, dr, adr, src, sr)
- case image.YCbCrSubsampleRatio444:
- z.scale_RGBA_YCbCr444_Over(dst, dr, adr, src, sr)
- case image.YCbCrSubsampleRatio422:
- z.scale_RGBA_YCbCr422_Over(dst, dr, adr, src, sr)
- case image.YCbCrSubsampleRatio420:
- z.scale_RGBA_YCbCr420_Over(dst, dr, adr, src, sr)
- case image.YCbCrSubsampleRatio440:
- z.scale_RGBA_YCbCr440_Over(dst, dr, adr, src, sr)
- }
default:
z.scale_RGBA_Image_Over(dst, dr, adr, src, sr)
}
@@ -1431,6 +1007,10 @@
if adr.Empty() || sr.Empty() {
return
}
+ op := opts.op()
+ if op == Over && opaque(src) { // TODO: also check that opts.SrcMask == nil.
+ op = Src
+ }
d2s := invert(s2d)
// bias is a translation of the mapping from dst co-ordinates to
// src co-ordinates such that the latter temporarily have
@@ -1450,39 +1030,24 @@
// we cannot use the type-specific fast paths, as they access
// the Pix fields directly without bounds checking.
if !sr.In(src.Bounds()) {
- switch opts.op() {
+ switch op {
case Over:
z.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias)
case Src:
z.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias)
}
} else if u, ok := src.(*image.Uniform); ok {
- transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, opts.op())
+ transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op)
} else {
- switch opts.op() {
+ switch op {
case Over:
switch dst := dst.(type) {
case *image.RGBA:
switch src := src.(type) {
- case *image.Gray:
- z.transform_RGBA_Gray_Over(dst, dr, adr, &d2s, src, sr, bias)
case *image.NRGBA:
z.transform_RGBA_NRGBA_Over(dst, dr, adr, &d2s, src, sr, bias)
case *image.RGBA:
z.transform_RGBA_RGBA_Over(dst, dr, adr, &d2s, src, sr, bias)
- case *image.YCbCr:
- switch src.SubsampleRatio {
- default:
- z.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias)
- case image.YCbCrSubsampleRatio444:
- z.transform_RGBA_YCbCr444_Over(dst, dr, adr, &d2s, src, sr, bias)
- case image.YCbCrSubsampleRatio422:
- z.transform_RGBA_YCbCr422_Over(dst, dr, adr, &d2s, src, sr, bias)
- case image.YCbCrSubsampleRatio420:
- z.transform_RGBA_YCbCr420_Over(dst, dr, adr, &d2s, src, sr, bias)
- case image.YCbCrSubsampleRatio440:
- z.transform_RGBA_YCbCr440_Over(dst, dr, adr, &d2s, src, sr, bias)
- }
default:
z.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias)
}
@@ -1528,69 +1093,6 @@
}
}
-func (ablInterpolator) scale_RGBA_Gray_Over(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_Gray_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.Gray, sr image.Rectangle) {
sw := int32(sr.Dx())
sh := int32(sr.Dy())
@@ -2034,694 +1536,6 @@
}
}
-func (ablInterpolator) scale_RGBA_YCbCr444_Over(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 YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i])<<16 + 1<<15
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s10j := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i])<<16 + 1<<15
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s01j := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i])<<16 + 1<<15
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s11j := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.CStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i])<<16 + 1<<15
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- 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_Over(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 YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i])<<16 + 1<<15
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s10j := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx1))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i])<<16 + 1<<15
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s01j := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx0))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i])<<16 + 1<<15
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s11j := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.CStride + ((sr.Min.X+int(sx1))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i])<<16 + 1<<15
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- 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_Over(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 YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i])<<16 + 1<<15
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s10j := ((sr.Min.Y+int(sy0))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx1))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i])<<16 + 1<<15
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s01j := ((sr.Min.Y+int(sy1))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx0))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i])<<16 + 1<<15
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s11j := ((sr.Min.Y+int(sy1))/2-src.Rect.Min.Y/2)*src.CStride + ((sr.Min.X+int(sx1))/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i])<<16 + 1<<15
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- 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_Over(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 YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i])<<16 + 1<<15
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sr.Min.Y+int(sy0)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s10j := ((sr.Min.Y+int(sy0))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i])<<16 + 1<<15
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
- s01j := ((sr.Min.Y+int(sy1))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx0) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i])<<16 + 1<<15
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sr.Min.Y+int(sy1)-src.Rect.Min.Y)*src.YStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
- s11j := ((sr.Min.Y+int(sy1))/2-src.Rect.Min.Y/2)*src.CStride + (sr.Min.X + int(sx1) - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i])<<16 + 1<<15
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- 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_YCbCr444_Src(dst *image.RGBA, dr, adr image.Rectangle, src *image.YCbCr, sr image.Rectangle) {
sw := int32(sr.Dx())
sh := int32(sr.Dy())
@@ -3730,70 +2544,6 @@
}
}
-func (ablInterpolator) transform_RGBA_Gray_Over(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_Gray_Src(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
@@ -4242,698 +2992,6 @@
}
}
-func (ablInterpolator) transform_RGBA_YCbCr444_Over(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 YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i])<<16 + 1<<15
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sy0-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s10j := (sy0-src.Rect.Min.Y)*src.CStride + (sx1 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i])<<16 + 1<<15
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sy1-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- s01j := (sy1-src.Rect.Min.Y)*src.CStride + (sx0 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i])<<16 + 1<<15
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sy1-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s11j := (sy1-src.Rect.Min.Y)*src.CStride + (sx1 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i])<<16 + 1<<15
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- 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_Over(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 YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i])<<16 + 1<<15
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sy0-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s10j := (sy0-src.Rect.Min.Y)*src.CStride + ((sx1)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i])<<16 + 1<<15
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sy1-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- s01j := (sy1-src.Rect.Min.Y)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i])<<16 + 1<<15
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sy1-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s11j := (sy1-src.Rect.Min.Y)*src.CStride + ((sx1)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i])<<16 + 1<<15
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- 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_Over(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 YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i])<<16 + 1<<15
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sy0-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s10j := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + ((sx1)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i])<<16 + 1<<15
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sy1-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- s01j := ((sy1)/2-src.Rect.Min.Y/2)*src.CStride + ((sx0)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i])<<16 + 1<<15
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sy1-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s11j := ((sy1)/2-src.Rect.Min.Y/2)*src.CStride + ((sx1)/2 - src.Rect.Min.X/2)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i])<<16 + 1<<15
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- 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_Over(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 YCbCr.RGBA method.
- s00yy1 := int(src.Y[s00i])<<16 + 1<<15
- s00cb1 := int(src.Cb[s00j]) - 128
- s00cr1 := int(src.Cr[s00j]) - 128
- s00ru := (s00yy1 + 91881*s00cr1) >> 8
- s00gu := (s00yy1 - 22554*s00cb1 - 46802*s00cr1) >> 8
- s00bu := (s00yy1 + 116130*s00cb1) >> 8
- if s00ru < 0 {
- s00ru = 0
- } else if s00ru > 0xffff {
- s00ru = 0xffff
- }
- if s00gu < 0 {
- s00gu = 0
- } else if s00gu > 0xffff {
- s00gu = 0xffff
- }
- if s00bu < 0 {
- s00bu = 0
- } else if s00bu > 0xffff {
- s00bu = 0xffff
- }
-
- s00r := float64(s00ru)
- s00g := float64(s00gu)
- s00b := float64(s00bu)
- s10i := (sy0-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s10j := ((sy0)/2-src.Rect.Min.Y/2)*src.CStride + (sx1 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s10yy1 := int(src.Y[s10i])<<16 + 1<<15
- s10cb1 := int(src.Cb[s10j]) - 128
- s10cr1 := int(src.Cr[s10j]) - 128
- s10ru := (s10yy1 + 91881*s10cr1) >> 8
- s10gu := (s10yy1 - 22554*s10cb1 - 46802*s10cr1) >> 8
- s10bu := (s10yy1 + 116130*s10cb1) >> 8
- if s10ru < 0 {
- s10ru = 0
- } else if s10ru > 0xffff {
- s10ru = 0xffff
- }
- if s10gu < 0 {
- s10gu = 0
- } else if s10gu > 0xffff {
- s10gu = 0xffff
- }
- if s10bu < 0 {
- s10bu = 0
- } else if s10bu > 0xffff {
- s10bu = 0xffff
- }
-
- s10r := float64(s10ru)
- s10g := float64(s10gu)
- s10b := float64(s10bu)
- s10r = xFrac1*s00r + xFrac0*s10r
- s10g = xFrac1*s00g + xFrac0*s10g
- s10b = xFrac1*s00b + xFrac0*s10b
- s01i := (sy1-src.Rect.Min.Y)*src.YStride + (sx0 - src.Rect.Min.X)
- s01j := ((sy1)/2-src.Rect.Min.Y/2)*src.CStride + (sx0 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s01yy1 := int(src.Y[s01i])<<16 + 1<<15
- s01cb1 := int(src.Cb[s01j]) - 128
- s01cr1 := int(src.Cr[s01j]) - 128
- s01ru := (s01yy1 + 91881*s01cr1) >> 8
- s01gu := (s01yy1 - 22554*s01cb1 - 46802*s01cr1) >> 8
- s01bu := (s01yy1 + 116130*s01cb1) >> 8
- if s01ru < 0 {
- s01ru = 0
- } else if s01ru > 0xffff {
- s01ru = 0xffff
- }
- if s01gu < 0 {
- s01gu = 0
- } else if s01gu > 0xffff {
- s01gu = 0xffff
- }
- if s01bu < 0 {
- s01bu = 0
- } else if s01bu > 0xffff {
- s01bu = 0xffff
- }
-
- s01r := float64(s01ru)
- s01g := float64(s01gu)
- s01b := float64(s01bu)
- s11i := (sy1-src.Rect.Min.Y)*src.YStride + (sx1 - src.Rect.Min.X)
- s11j := ((sy1)/2-src.Rect.Min.Y/2)*src.CStride + (sx1 - src.Rect.Min.X)
-
- // This is an inline version of image/color/ycbcr.go's YCbCr.RGBA method.
- s11yy1 := int(src.Y[s11i])<<16 + 1<<15
- s11cb1 := int(src.Cb[s11j]) - 128
- s11cr1 := int(src.Cr[s11j]) - 128
- s11ru := (s11yy1 + 91881*s11cr1) >> 8
- s11gu := (s11yy1 - 22554*s11cb1 - 46802*s11cr1) >> 8
- s11bu := (s11yy1 + 116130*s11cb1) >> 8
- if s11ru < 0 {
- s11ru = 0
- } else if s11ru > 0xffff {
- s11ru = 0xffff
- }
- if s11gu < 0 {
- s11gu = 0
- } else if s11gu > 0xffff {
- s11gu = 0xffff
- }
- if s11bu < 0 {
- s11bu = 0
- } else if s11bu > 0xffff {
- s11bu = 0xffff
- }
-
- s11r := float64(s11ru)
- s11g := float64(s11gu)
- s11b := float64(s11bu)
- s11r = xFrac1*s01r + xFrac0*s11r
- s11g = xFrac1*s01g + xFrac0*s11g
- s11b = xFrac1*s01b + xFrac0*s11b
- s11r = yFrac1*s10r + yFrac0*s11r
- s11g = yFrac1*s10g + yFrac0*s11g
- s11b = yFrac1*s10b + yFrac0*s11b
- 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_YCbCr444_Src(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
@@ -5960,9 +4018,13 @@
if adr.Empty() || sr.Empty() {
return
}
+ op := opts.op()
+ if op == Over && opaque(src) { // TODO: also check that opts.SrcMask == nil.
+ op = Src
+ }
if _, ok := src.(*image.Uniform); ok && sr.In(src.Bounds()) {
- Draw(dst, dr, src, src.Bounds().Min, opts.op())
+ Draw(dst, dr, src, src.Bounds().Min, op)
return
}
@@ -6009,7 +4071,7 @@
}
}
- switch opts.op() {
+ switch op {
case Over:
switch dst := dst.(type) {
case *image.RGBA:
@@ -6034,6 +4096,10 @@
if adr.Empty() || sr.Empty() {
return
}
+ op := opts.op()
+ if op == Over && opaque(src) { // TODO: also check that opts.SrcMask == nil.
+ op = Src
+ }
d2s := invert(s2d)
// bias is a translation of the mapping from dst co-ordinates to
// src co-ordinates such that the latter temporarily have
@@ -6051,7 +4117,7 @@
adr = adr.Sub(dr.Min)
if u, ok := src.(*image.Uniform); ok && sr.In(src.Bounds()) {
- transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, opts.op())
+ transform_Uniform(dst, dr, adr, &d2s, u, sr, bias, op)
return
}
@@ -6068,37 +4134,22 @@
// we cannot use the type-specific fast paths, as they access
// the Pix fields directly without bounds checking.
if !sr.In(src.Bounds()) {
- switch opts.op() {
+ switch op {
case Over:
q.transform_Image_Image_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
case Src:
q.transform_Image_Image_Src(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
}
} else {
- switch opts.op() {
+ switch op {
case Over:
switch dst := dst.(type) {
case *image.RGBA:
switch src := src.(type) {
- case *image.Gray:
- q.transform_RGBA_Gray_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
case *image.NRGBA:
q.transform_RGBA_NRGBA_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
case *image.RGBA:
q.transform_RGBA_RGBA_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
- case *image.YCbCr:
- switch src.SubsampleRatio {
- default:
- q.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
- case image.YCbCrSubsampleRatio444:
- q.transform_RGBA_YCbCr444_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
- case image.YCbCrSubsampleRatio422:
- q.transform_RGBA_YCbCr422_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
- case image.YCbCrSubsampleRatio420:
- q.transform_RGBA_YCbCr420_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
- case image.YCbCrSubsampleRatio440:
- q.transform_RGBA_YCbCr440_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
- }
default:
q.transform_RGBA_Image_Over(dst, dr, adr, &d2s, src, sr, bias, xscale, yscale)
}
@@ -6517,105 +4568,6 @@
}
}
-func (q *Kernel) transform_RGBA_Gray_Over(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_Gray_Src(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.
@@ -7131,502 +5083,6 @@
}
}
-func (q *Kernel) transform_RGBA_YCbCr444_Over(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 YCbCr.RGBA method.
- pyy1 := int(src.Y[pi])<<16 + 1<<15
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pru := (pyy1 + 91881*pcr1) >> 8
- pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pbu := (pyy1 + 116130*pcb1) >> 8
- if pru < 0 {
- pru = 0
- } else if pru > 0xffff {
- pru = 0xffff
- }
- if pgu < 0 {
- pgu = 0
- } else if pgu > 0xffff {
- pgu = 0xffff
- }
- if pbu < 0 {
- pbu = 0
- } else if pbu > 0xffff {
- pbu = 0xffff
- }
-
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- }
- }
- }
- }
- dst.Pix[d+0] = uint8(fffftou(pr) >> 8)
- dst.Pix[d+1] = uint8(fffftou(pg) >> 8)
- dst.Pix[d+2] = uint8(fffftou(pb) >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_YCbCr422_Over(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 YCbCr.RGBA method.
- pyy1 := int(src.Y[pi])<<16 + 1<<15
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pru := (pyy1 + 91881*pcr1) >> 8
- pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pbu := (pyy1 + 116130*pcb1) >> 8
- if pru < 0 {
- pru = 0
- } else if pru > 0xffff {
- pru = 0xffff
- }
- if pgu < 0 {
- pgu = 0
- } else if pgu > 0xffff {
- pgu = 0xffff
- }
- if pbu < 0 {
- pbu = 0
- } else if pbu > 0xffff {
- pbu = 0xffff
- }
-
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- }
- }
- }
- }
- dst.Pix[d+0] = uint8(fffftou(pr) >> 8)
- dst.Pix[d+1] = uint8(fffftou(pg) >> 8)
- dst.Pix[d+2] = uint8(fffftou(pb) >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_YCbCr420_Over(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 YCbCr.RGBA method.
- pyy1 := int(src.Y[pi])<<16 + 1<<15
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pru := (pyy1 + 91881*pcr1) >> 8
- pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pbu := (pyy1 + 116130*pcb1) >> 8
- if pru < 0 {
- pru = 0
- } else if pru > 0xffff {
- pru = 0xffff
- }
- if pgu < 0 {
- pgu = 0
- } else if pgu > 0xffff {
- pgu = 0xffff
- }
- if pbu < 0 {
- pbu = 0
- } else if pbu > 0xffff {
- pbu = 0xffff
- }
-
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- }
- }
- }
- }
- dst.Pix[d+0] = uint8(fffftou(pr) >> 8)
- dst.Pix[d+1] = uint8(fffftou(pg) >> 8)
- dst.Pix[d+2] = uint8(fffftou(pb) >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
-func (q *Kernel) transform_RGBA_YCbCr440_Over(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 YCbCr.RGBA method.
- pyy1 := int(src.Y[pi])<<16 + 1<<15
- pcb1 := int(src.Cb[pj]) - 128
- pcr1 := int(src.Cr[pj]) - 128
- pru := (pyy1 + 91881*pcr1) >> 8
- pgu := (pyy1 - 22554*pcb1 - 46802*pcr1) >> 8
- pbu := (pyy1 + 116130*pcb1) >> 8
- if pru < 0 {
- pru = 0
- } else if pru > 0xffff {
- pru = 0xffff
- }
- if pgu < 0 {
- pgu = 0
- } else if pgu > 0xffff {
- pgu = 0xffff
- }
- if pbu < 0 {
- pbu = 0
- } else if pbu > 0xffff {
- pbu = 0xffff
- }
-
- pr += float64(pru) * w
- pg += float64(pgu) * w
- pb += float64(pbu) * w
- }
- }
- }
- }
- dst.Pix[d+0] = uint8(fffftou(pr) >> 8)
- dst.Pix[d+1] = uint8(fffftou(pg) >> 8)
- dst.Pix[d+2] = uint8(fffftou(pb) >> 8)
- dst.Pix[d+3] = 0xff
- }
- }
-}
-
func (q *Kernel) transform_RGBA_YCbCr444_Src(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.
diff --git a/draw/scale.go b/draw/scale.go
index 39520f4..00ef1d3 100644
--- a/draw/scale.go
+++ b/draw/scale.go
@@ -431,3 +431,10 @@
}
}
}
+
+func opaque(m image.Image) bool {
+ o, ok := m.(interface {
+ Opaque() bool
+ })
+ return ok && o.Opaque()
+}
