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renamed mask to stencil

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This commit is contained in:
Thomas Friedel 2019-05-05 11:38:24 +02:00
parent c945678725
commit ea3cb81231
3 changed files with 23 additions and 25 deletions
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12
backend/softwarebackend/fill.go
View file

@ -111,8 +111,8 @@ func (b *SoftwareBackend) FillImageMask(style *backendbase.FillStyle, mask *imag
})
}
func (b *SoftwareBackend) clearMask() {
p := b.mask.Pix
func (b *SoftwareBackend) clearStencil() {
p := b.stencil.Pix
for i := range p {
p[i] = 0
}
@ -126,18 +126,16 @@ func (b *SoftwareBackend) ClearClip() {
}
func (b *SoftwareBackend) Clip(pts [][2]float64) {
p2 := b.mask.Pix
for i := range p2 {
p2[i] = 0
}
b.clearStencil()
iterateTriangles(pts[:], func(tri [][2]float64) {
b.fillTriangleNoAA(tri, func(x, y int) {
b.mask.SetAlpha(x, y, color.Alpha{A: 255})
b.stencil.SetAlpha(x, y, color.Alpha{A: 255})
})
})
p := b.clip.Pix
p2 := b.stencil.Pix
for i := range p {
if p2[i] == 0 {
p[i] = 0

4
backend/softwarebackend/software.go
View file

@ -15,7 +15,7 @@ type SoftwareBackend struct {
blurSwap *image.RGBA
clip *image.Alpha
mask *image.Alpha
stencil *image.Alpha
w, h int
}
@ -29,7 +29,7 @@ func (b *SoftwareBackend) SetSize(w, h int) {
b.w, b.h = w, h
b.Image = image.NewRGBA(image.Rect(0, 0, w, h))
b.clip = image.NewAlpha(image.Rect(0, 0, w, h))
b.mask = image.NewAlpha(image.Rect(0, 0, w, h))
b.stencil = image.NewAlpha(image.Rect(0, 0, w, h))
b.ClearClip()
}

28
backend/softwarebackend/triangles.go
View file

@ -401,7 +401,7 @@ func (b *SoftwareBackend) fillQuadMSAA(quad [4][2]float64, msaaLevel int, msaaPi
}
func (b *SoftwareBackend) fillQuad(pts [4][2]float64, fn func(x, y, tx, ty float64) color.RGBA) {
b.clearMask()
b.clearStencil()
if b.MSAA > 0 {
var msaaPixelBuf [500]msaaPixel
@ -411,10 +411,10 @@ func (b *SoftwareBackend) fillQuad(pts [4][2]float64, fn func(x, y, tx, ty float
if b.clip.AlphaAt(x, y).A == 0 {
return
}
if b.mask.AlphaAt(x, y).A > 0 {
if b.stencil.AlphaAt(x, y).A > 0 {
return
}
b.mask.SetAlpha(x, y, color.Alpha{A: 255})
b.stencil.SetAlpha(x, y, color.Alpha{A: 255})
col := fn(float64(x)+0.5, float64(y)+0.5, tx, ty)
if col.A > 0 {
b.Image.SetRGBA(x, y, mix(col, b.Image.RGBAAt(x, y)))
@ -424,10 +424,10 @@ func (b *SoftwareBackend) fillQuad(pts [4][2]float64, fn func(x, y, tx, ty float
samples := (b.MSAA + 1) * (b.MSAA + 1)
for i, px := range msaaPixels {
if px.ix < 0 || b.clip.AlphaAt(px.ix, px.iy).A == 0 || b.mask.AlphaAt(px.ix, px.iy).A > 0 {
if px.ix < 0 || b.clip.AlphaAt(px.ix, px.iy).A == 0 || b.stencil.AlphaAt(px.ix, px.iy).A > 0 {
continue
}
b.mask.SetAlpha(px.ix, px.iy, color.Alpha{A: 255})
b.stencil.SetAlpha(px.ix, px.iy, color.Alpha{A: 255})
var mr, mg, mb, ma int
for j, px2 := range msaaPixels[i:] {
@ -458,10 +458,10 @@ func (b *SoftwareBackend) fillQuad(pts [4][2]float64, fn func(x, y, tx, ty float
if b.clip.AlphaAt(x, y).A == 0 {
return
}
if b.mask.AlphaAt(x, y).A > 0 {
if b.stencil.AlphaAt(x, y).A > 0 {
return
}
b.mask.SetAlpha(x, y, color.Alpha{A: 255})
b.stencil.SetAlpha(x, y, color.Alpha{A: 255})
col := fn(float64(x)+0.5, float64(y)+0.5, tx, ty)
if col.A > 0 {
b.Image.SetRGBA(x, y, mix(col, b.Image.RGBAAt(x, y)))
@ -493,10 +493,10 @@ func (b *SoftwareBackend) fillTrianglesNoAA(pts [][2]float64, fn func(x, y float
if b.clip.AlphaAt(x, y).A == 0 {
return
}
if b.mask.AlphaAt(x, y).A > 0 {
if b.stencil.AlphaAt(x, y).A > 0 {
return
}
b.mask.SetAlpha(x, y, color.Alpha{A: 255})
b.stencil.SetAlpha(x, y, color.Alpha{A: 255})
col := fn(float64(x), float64(y))
if col.A > 0 {
b.Image.SetRGBA(x, y, mix(col, b.Image.RGBAAt(x, y)))
@ -514,10 +514,10 @@ func (b *SoftwareBackend) fillTrianglesMSAA(pts [][2]float64, msaaLevel int, fn
if b.clip.AlphaAt(x, y).A == 0 {
return
}
if b.mask.AlphaAt(x, y).A > 0 {
if b.stencil.AlphaAt(x, y).A > 0 {
return
}
b.mask.SetAlpha(x, y, color.Alpha{A: 255})
b.stencil.SetAlpha(x, y, color.Alpha{A: 255})
col := fn(float64(x), float64(y))
if col.A > 0 {
b.Image.SetRGBA(x, y, mix(col, b.Image.RGBAAt(x, y)))
@ -528,10 +528,10 @@ func (b *SoftwareBackend) fillTrianglesMSAA(pts [][2]float64, msaaLevel int, fn
samples := (msaaLevel + 1) * (msaaLevel + 1)
for i, px := range msaaPixels {
if px.ix < 0 || b.clip.AlphaAt(px.ix, px.iy).A == 0 || b.mask.AlphaAt(px.ix, px.iy).A > 0 {
if px.ix < 0 || b.clip.AlphaAt(px.ix, px.iy).A == 0 || b.stencil.AlphaAt(px.ix, px.iy).A > 0 {
continue
}
b.mask.SetAlpha(px.ix, px.iy, color.Alpha{A: 255})
b.stencil.SetAlpha(px.ix, px.iy, color.Alpha{A: 255})
var mr, mg, mb, ma int
for j, px2 := range msaaPixels[i:] {
@ -559,7 +559,7 @@ func (b *SoftwareBackend) fillTrianglesMSAA(pts [][2]float64, msaaLevel int, fn
}
func (b *SoftwareBackend) fillTriangles(pts [][2]float64, fn func(x, y float64) color.RGBA) {
b.clearMask()
b.clearStencil()
if b.MSAA > 0 {
b.fillTrianglesMSAA(pts, b.MSAA, fn)