crunchy-rocks/draw2d
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declare vars before loop

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This commit is contained in:
Laurent Le Goff 2011-04-14 18:32:35 +02:00
parent f4760bc626
commit 89f7d996af
1 changed files with 12 additions and 12 deletions
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24
draw2d/rgba_interpolation.go
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@ -115,17 +115,18 @@ func compose(c1, c2 image.Color) image.Color {
func DrawImage(src image.Image, dest draw.Image, tr MatrixTransform, op draw.Op, filter ImageFilter) {
b := src.Bounds()
x0, y0, x1, y1 := float64(b.Min.X), float64(b.Min.Y), float64(b.Max.X), float64(b.Max.Y)
bounds := src.Bounds()
x0, y0, x1, y1 := float64(bounds.Min.X), float64(bounds.Min.Y), float64(bounds.Max.X), float64(bounds.Max.Y)
tr.TransformRectangle(&x0, &y0, &x1, &y1)
var x, y, u, v float64
var c1, c2, cr image.Color
var r, g, b, a, ia, r1, g1, b1, a1, r2, g2, b2, a2 uint32
for x = x0; x < x1; x++ {
for y = y0; y < y1; y++ {
u = x
v = y
tr.InverseTransform(&u, &v)
c1 := dest.At(int(x), int(y))
var c2 image.Color
c1 = dest.At(int(x), int(y))
switch filter {
case LinearFilter:
c2 = src.At(int(u), int(v))
@ -134,16 +135,15 @@ func DrawImage(src image.Image, dest draw.Image, tr MatrixTransform, op draw.Op,
case BicubicFilter:
c2 = getColorBicubic(src, u, v)
}
var cr image.Color
switch op {
case draw.Over:
r1, g1, b1, a1 := c1.RGBA()
r2, g2, b2, a2 := c2.RGBA()
ia := M - a2
r := ((r1 * ia) / M) + r2
g := ((g1 * ia) / M) + g2
b := ((b1 * ia) / M) + b2
a := ((a1 * ia) / M) + a2
r1, g1, b1, a1 = c1.RGBA()
r2, g2, b2, a2 = c2.RGBA()
ia = M - a2
r = ((r1 * ia) / M) + r2
g = ((g1 * ia) / M) + g2
b = ((b1 * ia) / M) + b2
a = ((a1 * ia) / M) + a2
cr = image.RGBAColor{uint8(r >> 8), uint8(g >> 8), uint8(b >> 8), uint8(a >> 8)}
default:
cr = c2