freetype: make freetype clean wrt "go vet".

R=dsymonds
CC=golang-dev
http://codereview.appspot.com/6202052

example/gamma/main.go

@@ -18,7 +18,10 @@ import (
 )
 
 func p(x, y int) raster.Point {
-	return raster.Point{raster.Fix32(x * 256), raster.Fix32(y * 256)}
+	return raster.Point{
+		X: raster.Fix32(x * 256),
+		Y: raster.Fix32(y * 256),
+	}
 }
 
 func main() {

example/raster/main.go

@@ -84,7 +84,10 @@ var inside = []node{
 
 func p(n node) raster.Point {
 	x, y := 20+n.x/4, 380-n.y/4
-	return raster.Point{raster.Fix32(x * 256), raster.Fix32(y * 256)}
+	return raster.Point{
+		X: raster.Fix32(x * 256),
+		Y: raster.Fix32(y * 256),
+	}
 }
 
 func contour(r *raster.Rasterizer, ns []node) {

example/round/main.go

@@ -33,7 +33,7 @@ func main() {
 	t := raster.Fix32(r * math.Tan(math.Pi/8))
 
 	m := image.NewRGBA(image.Rect(0, 0, 800, 600))
-	draw.Draw(m, m.Bounds(), &image.Uniform{color.RGBA{63, 63, 63, 255}}, image.ZP, draw.Src)
+	draw.Draw(m, m.Bounds(), image.NewUniform(color.RGBA{63, 63, 63, 255}), image.ZP, draw.Src)
 	mp := raster.NewRGBAPainter(m)
 	mp.SetColor(image.Black)
 	z := raster.NewRasterizer(800, 600)
@@ -41,23 +41,23 @@ func main() {
 	for i := 0; i < n; i++ {
 		cx := raster.Fix32(25600 + 51200*(i%4))
 		cy := raster.Fix32(2560 + 32000*(i/4))
-		c := raster.Point{cx, cy}
+		c := raster.Point{X: cx, Y: cy}
 		theta := math.Pi * (0.5 + 0.5*float64(i)/(n-1))
 		dx := raster.Fix32(r * math.Cos(theta))
 		dy := raster.Fix32(r * math.Sin(theta))
-		d := raster.Point{dx, dy}
+		d := raster.Point{X: dx, Y: dy}
 		// Draw a quarter-circle approximated by two quadratic segments,
 		// with each segment spanning 45 degrees.
 		z.Start(c)
-		z.Add1(c.Add(raster.Point{r, 0}))
-		z.Add2(c.Add(raster.Point{r, t}), c.Add(raster.Point{s, s}))
-		z.Add2(c.Add(raster.Point{t, r}), c.Add(raster.Point{0, r}))
+		z.Add1(c.Add(raster.Point{X: r, Y: 0}))
+		z.Add2(c.Add(raster.Point{X: r, Y: t}), c.Add(raster.Point{X: s, Y: s}))
+		z.Add2(c.Add(raster.Point{X: t, Y: r}), c.Add(raster.Point{X: 0, Y: r}))
 		// Add another quadratic segment whose angle ranges between 0 and 90 degrees.
 		// For an explanation of the magic constants 22, 150, 181 and 256, read the
 		// comments in the freetype/raster package.
-		dot := 256 * d.Dot(raster.Point{0, r}) / (r * r)
+		dot := 256 * d.Dot(raster.Point{X: 0, Y: r}) / (r * r)
 		multiple := raster.Fix32(150 - 22*(dot-181)/(256-181))
-		z.Add2(c.Add(raster.Point{dx, r + dy}.Mul(multiple)), c.Add(d))
+		z.Add2(c.Add(raster.Point{X: dx, Y: r + dy}.Mul(multiple)), c.Add(d))
 		// Close the curve.
 		z.Add1(c)
 	}

freetype/freetype.go

@@ -47,7 +47,10 @@ func ParseFont(b []byte) (*truetype.Font, error) {
 // Pt converts from a co-ordinate pair measured in pixels to a raster.Point
 // co-ordinate pair measured in raster.Fix32 units.
 func Pt(x, y int) raster.Point {
-	return raster.Point{raster.Fix32(x << 8), raster.Fix32(y << 8)}
+	return raster.Point{
+		X: raster.Fix32(x << 8),
+		Y: raster.Fix32(y << 8),
+	}
 }
 
 // A Context holds the state for drawing text in a given font and size.
@@ -111,15 +114,15 @@ func (c *Context) drawContour(ps []truetype.Point, dx, dy raster.Fix32) {
 	// start is the same thing measured in fixed point units and positive Y
 	// going downwards, and offset by (dx, dy)
 	start := raster.Point{
-		dx + c.FUnitToFix32(int(ps[0].X)),
-		dy + c.FUnitToFix32(-int(ps[0].Y)),
+		X: dx + c.FUnitToFix32(int(ps[0].X)),
+		Y: dy + c.FUnitToFix32(-int(ps[0].Y)),
 	}
 	c.r.Start(start)
 	q0, on0 := start, true
 	for _, p := range ps[1:] {
 		q := raster.Point{
-			dx + c.FUnitToFix32(int(p.X)),
-			dy + c.FUnitToFix32(-int(p.Y)),
+			X: dx + c.FUnitToFix32(int(p.X)),
+			Y: dy + c.FUnitToFix32(-int(p.Y)),
 		}
 		on := p.Flags&0x01 != 0
 		if on {
@@ -133,8 +136,8 @@ func (c *Context) drawContour(ps []truetype.Point, dx, dy raster.Fix32) {
 				// No-op.
 			} else {
 				mid := raster.Point{
-					(q0.X + q.X) / 2,
-					(q0.Y + q.Y) / 2,
+					X: (q0.X + q.X) / 2,
+					Y: (q0.Y + q.Y) / 2,
 				}
 				c.r.Add2(q0, mid)
 			}