aw/golang-freetype
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freetype: update for image.Pix changes.

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R=r
CC=golang-dev
http://codereview.appspot.com/4675071
This commit is contained in:
Nigel Tao 2011-07-10 15:05:40 +10:00
parent 03e93b9a66
commit 43d4d89685
3 changed files with 6 additions and 21 deletions
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13
example/gamma/main.go
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@ -21,17 +21,6 @@ func p(x, y int) raster.Point {
return raster.Point{raster.Fix32(x * 256), raster.Fix32(y * 256)}
}
func clear(m *image.Alpha) {
b := m.Bounds()
for y := b.Min.Y; y < b.Max.Y; y++ {
base := y * m.Stride
p := m.Pix[base+b.Min.X : base+b.Max.X]
for i, _ := range p {
p[i] = image.AlphaColor{0}
}
}
}
func main() {
// Draw a rounded corner that is one pixel wide.
r := raster.NewRasterizer(50, 50)
@ -57,7 +46,7 @@ func main() {
painter := raster.NewAlphaSrcPainter(mask)
gammas := []float64{1.0 / 10.0, 1.0 / 3.0, 1.0 / 2.0, 2.0 / 3.0, 4.0 / 5.0, 1.0, 5.0 / 4.0, 3.0 / 2.0, 2.0, 3.0, 10.0}
for i, g := range gammas {
clear(mask)
draw.Draw(mask, mask.Bounds(), image.Transparent, image.ZP, draw.Src)
r.Rasterize(raster.NewGammaCorrectionPainter(painter, g))
x, y := 50*i+25, 25
draw.DrawMask(rgba, image.Rect(x, y, x+50, y+50), image.White, image.ZP, mask, image.ZP, draw.Over)

8
example/round/main.go
View File

@ -14,6 +14,7 @@ import (
"bufio"
"fmt"
"image"
"image/draw"
"image/png"
"log"
"math"
@ -31,12 +32,7 @@ func main() {
t := raster.Fix32(r * math.Tan(math.Pi/8))
m := image.NewRGBA(800, 600)
for y := 0; y < 600; y++ {
p := m.Pix[y*m.Stride : y*m.Stride+800]
for i := range p {
p[i] = image.RGBAColor{63, 63, 63, 255}
}
}
draw.Draw(m, m.Bounds(), &image.ColorImage{image.RGBAColor{63, 63, 63, 255}}, image.ZP, draw.Src)
mp := raster.NewRGBAPainter(m)
mp.SetColor(image.Black)
z := raster.NewRasterizer(800, 600)

6
freetype/raster/paint.go
View File

@ -58,7 +58,7 @@ func (r AlphaOverPainter) Paint(ss []Span, done bool) {
if s.X0 >= s.X1 {
continue
}
base := s.Y * r.Image.Stride
base := (s.Y-r.Image.Rect.Min.Y)*r.Image.Stride - r.Image.Rect.Min.X
p := r.Image.Pix[base+s.X0 : base+s.X1]
a := int(s.A >> 24)
for i, c := range p {
@ -99,7 +99,7 @@ func (r AlphaSrcPainter) Paint(ss []Span, done bool) {
if s.X0 >= s.X1 {
continue
}
base := s.Y * r.Image.Stride
base := (s.Y-r.Image.Rect.Min.Y)*r.Image.Stride - r.Image.Rect.Min.X
p := r.Image.Pix[base+s.X0 : base+s.X1]
color := image.AlphaColor{uint8(s.A >> 24)}
for i := range p {
@ -141,7 +141,7 @@ func (r *RGBAPainter) Paint(ss []Span, done bool) {
if s.X0 >= s.X1 {
continue
}
base := s.Y * r.Image.Stride
base := (s.Y-r.Image.Rect.Min.Y)*r.Image.Stride - r.Image.Rect.Min.X
p := r.Image.Pix[base+s.X0 : base+s.X1]
for i, rgba := range p {
// This code is duplicated from drawGlyphOver in $GOROOT/src/pkg/exp/draw/draw.go.