1 files changed, 92 insertions, 0 deletions
diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/paint.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/paint.go
new file mode 100644
index 000000000..885d993ae
--- /dev/null
+++ b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/paint.go
@@ -0,0 +1,92 @@
+// Copyright 2010 The draw2d Authors. All rights reserved.
+// created: 21/11/2010 by Laurent Le Goff
+
+package draw2d
+
+/*
+import (
+	"image/draw"
+	"image"
+	"freetype-go.googlecode.com/hg/freetype/raster"
+)*/
+
+const M = 1<<16 - 1
+
+/*
+type NRGBAPainter struct {
+	// The image to compose onto.
+	Image *image.NRGBA
+	// The Porter-Duff composition operator.
+	Op draw.Op
+	// The 16-bit color to paint the spans.
+	cr, cg, cb, ca uint32
+}
+
+// Paint satisfies the Painter interface by painting ss onto an image.RGBA.
+func (r *NRGBAPainter) Paint(ss []raster.Span, done bool) {
+	b := r.Image.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
+		}
+		base := s.Y * r.Image.Stride
+		p := r.Image.Pix[base+s.X0 : base+s.X1]
+		// This code is duplicated from drawGlyphOver in $GOROOT/src/pkg/image/draw/draw.go.
+		// TODO(nigeltao): Factor out common code into a utility function, once the compiler
+		// can inline such function calls.
+		ma := s.A >> 16
+		if r.Op == draw.Over {
+			for i, nrgba := range p {
+				dr, dg, db, da := nrgba.
+				a := M - (r.ca*ma)/M
+				da = (da*a + r.ca*ma) / M
+				if da != 0 {
+					dr = minUint32(M, (dr*a+r.cr*ma)/da)
+					dg = minUint32(M, (dg*a+r.cg*ma)/da)
+					db = minUint32(M, (db*a+r.cb*ma)/da)
+				} else {
+					dr, dg, db = 0, 0, 0
+				}
+				p[i] = image.NRGBAColor{uint8(dr >> 8), uint8(dg >> 8), uint8(db >> 8), uint8(da >> 8)}
+			}
+		} else {
+			for i, nrgba := range p {
+				dr, dg, db, da := nrgba.RGBA()
+				a := M - ma
+				da = (da*a + r.ca*ma) / M
+				if da != 0 {
+					dr = minUint32(M, (dr*a+r.cr*ma)/da)
+					dg = minUint32(M, (dg*a+r.cg*ma)/da)
+					db = minUint32(M, (db*a+r.cb*ma)/da)
+				} else {
+					dr, dg, db = 0, 0, 0
+				}
+				p[i] = image.NRGBAColor{uint8(dr >> 8), uint8(dg >> 8), uint8(db >> 8), uint8(da >> 8)}
+			}
+		}
+	}
+
+}
+
+// SetColor sets the color to paint the spans.
+func (r *NRGBAPainter) SetColor(c image.Color) {
+	r.cr, r.cg, r.cb, r.ca = c.RGBA()
+}
+
+// NewRGBAPainter creates a new RGBAPainter for the given image.
+func NewNRGBAPainter(m *image.NRGBA) *NRGBAPainter {
+	return &NRGBAPainter{Image: m}
+}
+*/