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image mask uses fill style

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This commit is contained in:
Thomas Friedel 2019-05-05 11:48:00 +02:00
parent ea3cb81231
commit 62e4cae716
1 changed files with 34 additions and 25 deletions
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57
backend/softwarebackend/fill.go
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@ -20,11 +20,35 @@ func (b *SoftwareBackend) Clear(pts [4][2]float64) {
}
func (b *SoftwareBackend) Fill(style *backendbase.FillStyle, pts [][2]float64) {
ffn := fillFunc(style)
if style.Blur > 0 {
b.activateBlurTarget()
defer b.drawBlurred(style.Blur)
b.fillTriangles(pts, ffn)
b.drawBlurred(style.Blur)
} else {
b.fillTriangles(pts, ffn)
}
}
func (b *SoftwareBackend) FillImageMask(style *backendbase.FillStyle, mask *image.Alpha, pts [4][2]float64) {
ffn := fillFunc(style)
mw := float64(mask.Bounds().Dx())
mh := float64(mask.Bounds().Dy())
b.fillQuad(pts, func(x, y, sx2, sy2 float64) color.RGBA {
sxi := int(mw * sx2)
syi := int(mh * sy2)
a := mask.AlphaAt(sxi, syi)
if a.A == 0 {
return color.RGBA{}
}
col := ffn(x, y)
return alphaColor(col, a)
})
}
func fillFunc(style *backendbase.FillStyle) func(x, y float64) color.RGBA {
if lg := style.LinearGradient; lg != nil {
lg := lg.(*LinearGradient)
from := [2]float64{style.Gradient.X0, style.Gradient.Y0}
@ -32,18 +56,18 @@ func (b *SoftwareBackend) Fill(style *backendbase.FillStyle, pts [][2]float64) {
dirlen := math.Sqrt(dir[0]*dir[0] + dir[1]*dir[1])
dir[0] /= dirlen
dir[1] /= dirlen
b.fillTriangles(pts, func(x, y float64) color.RGBA {
return func(x, y float64) color.RGBA {
pos := [2]float64{x - from[0], y - from[1]}
r := (pos[0]*dir[0] + pos[1]*dir[1]) / dirlen
return lg.data.ColorAt(r)
})
}
} else if rg := style.RadialGradient; rg != nil {
rg := rg.(*RadialGradient)
from := [2]float64{style.Gradient.X0, style.Gradient.Y0}
to := [2]float64{style.Gradient.X1, style.Gradient.Y1}
radFrom := style.Gradient.RadFrom
radTo := style.Gradient.RadTo
b.fillTriangles(pts, func(x, y float64) color.RGBA {
return func(x, y float64) color.RGBA {
pos := [2]float64{x, y}
oa := 0.5 * math.Sqrt(
math.Pow(-2.0*from[0]*from[0]+2.0*from[0]*to[0]+2.0*from[0]*pos[0]-2.0*to[0]*pos[0]-2.0*from[1]*from[1]+2.0*from[1]*to[1]+2.0*from[1]*pos[1]-2.0*to[1]*pos[1]+2.0*radFrom*radFrom-2.0*radFrom*radTo, 2.0)-
@ -58,7 +82,7 @@ func (b *SoftwareBackend) Fill(style *backendbase.FillStyle, pts [][2]float64) {
}
o := math.Max(o1, o2)
return rg.data.ColorAt(o)
})
}
} else if ip := style.ImagePattern; ip != nil {
ip := ip.(*ImagePattern)
img := ip.data.Image.(*Image)
@ -67,7 +91,7 @@ func (b *SoftwareBackend) Fill(style *backendbase.FillStyle, pts [][2]float64) {
fw, fh := float64(w), float64(h)
rx := ip.data.Repeat == backendbase.Repeat || ip.data.Repeat == backendbase.RepeatX
ry := ip.data.Repeat == backendbase.Repeat || ip.data.Repeat == backendbase.RepeatY
b.fillTriangles(pts, func(x, y float64) color.RGBA {
return func(x, y float64) color.RGBA {
pos := [2]float64{x, y}
tfptx := pos[0]*ip.data.Transform[0] + pos[1]*ip.data.Transform[1] + ip.data.Transform[2]
tfpty := pos[0]*ip.data.Transform[3] + pos[1]*ip.data.Transform[4] + ip.data.Transform[5]
@ -89,28 +113,13 @@ func (b *SoftwareBackend) Fill(style *backendbase.FillStyle, pts [][2]float64) {
}
return toRGBA(mip.At(mx, my))
})
} else {
b.fillTriangles(pts, func(x, y float64) color.RGBA {
}
}
return func(x, y float64) color.RGBA {
return style.Color
})
}
}
func (b *SoftwareBackend) FillImageMask(style *backendbase.FillStyle, mask *image.Alpha, pts [4][2]float64) {
mw := float64(mask.Bounds().Dx())
mh := float64(mask.Bounds().Dy())
b.fillQuad(pts, func(x, y, sx2, sy2 float64) color.RGBA {
sxi := int(mw * sx2)
syi := int(mh * sy2)
a := mask.AlphaAt(sxi, syi)
if a.A == 0 {
return color.RGBA{}
}
return alphaColor(style.Color, a)
})
}
func (b *SoftwareBackend) clearStencil() {
p := b.stencil.Pix
for i := range p {