Diff
diff --git a/gg/pattern.go b/gg/pattern.go
deleted file mode 100644
index 6b396ec..0000000
--- a/gg/pattern.go
+++ /dev/null
@@ -1,123 +0,0 @@
-package gg
-
-import (
- "image"
- "image/color"
-
- "github.com/golang/freetype/raster"
-)
-
-type RepeatOp int
-
-const (
- RepeatBoth RepeatOp = iota
- RepeatX
- RepeatY
- RepeatNone
-)
-
-type Pattern interface {
- ColorAt(x, y int) color.Color
-}
-
-// Solid Pattern
-type solidPattern struct {
- color color.Color
-}
-
-func (p *solidPattern) ColorAt(x, y int) color.Color {
- return p.color
-}
-
-func NewSolidPattern(color color.Color) Pattern {
- return &solidPattern{color: color}
-}
-
-// Surface Pattern
-type surfacePattern struct {
- im image.Image
- op RepeatOp
-}
-
-func (p *surfacePattern) ColorAt(x, y int) color.Color {
- b := p.im.Bounds()
- switch p.op {
- case RepeatX:
- if y >= b.Dy() {
- return color.Transparent
- }
- case RepeatY:
- if x >= b.Dx() {
- return color.Transparent
- }
- case RepeatNone:
- if x >= b.Dx() || y >= b.Dy() {
- return color.Transparent
- }
- }
- x = x%b.Dx() + b.Min.X
- y = y%b.Dy() + b.Min.Y
- return p.im.At(x, y)
-}
-
-func NewSurfacePattern(im image.Image, op RepeatOp) Pattern {
- return &surfacePattern{im: im, op: op}
-}
-
-type patternPainter struct {
- im *image.RGBA
- mask *image.Alpha
- p Pattern
-}
-
-// Paint satisfies the Painter interface.
-func (r *patternPainter) Paint(ss []raster.Span, done bool) {
- b := r.im.Bounds()
- for _, s := range ss {
- if s.Y < b.Min.Y {
- continue
- }
- if s.Y >= b.Max.Y {
- return
- }
- if s.X0 < b.Min.X {
- s.X0 = b.Min.X
- }
- if s.X1 > b.Max.X {
- s.X1 = b.Max.X
- }
- if s.X0 >= s.X1 {
- continue
- }
- const m = 1<<16 - 1
- y := s.Y - r.im.Rect.Min.Y
- x0 := s.X0 - r.im.Rect.Min.X
- // RGBAPainter.Paint() in $GOPATH/src/github.com/golang/freetype/raster/paint.go
- i0 := (s.Y-r.im.Rect.Min.Y)*r.im.Stride + (s.X0-r.im.Rect.Min.X)*4
- i1 := i0 + (s.X1-s.X0)*4
- for i, x := i0, x0; i < i1; i, x = i+4, x+1 {
- ma := s.Alpha
- if r.mask != nil {
- ma = ma * uint32(r.mask.AlphaAt(x, y).A) / 255
- if ma == 0 {
- continue
- }
- }
- c := r.p.ColorAt(x, y)
- cr, cg, cb, ca := c.RGBA()
- dr := uint32(r.im.Pix[i+0])
- dg := uint32(r.im.Pix[i+1])
- db := uint32(r.im.Pix[i+2])
- da := uint32(r.im.Pix[i+3])
- a := (m - (ca * ma / m)) * 0x101
- r.im.Pix[i+0] = uint8((dr*a + cr*ma) / m >> 8)
- r.im.Pix[i+1] = uint8((dg*a + cg*ma) / m >> 8)
- r.im.Pix[i+2] = uint8((db*a + cb*ma) / m >> 8)
- r.im.Pix[i+3] = uint8((da*a + ca*ma) / m >> 8)
- }
- }
-}
-
-func newPatternPainter(im *image.RGBA, mask *image.Alpha, p Pattern) *patternPainter {
- return &patternPainter{im, mask, p}
-}
