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graphics: Refactoring

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This commit is contained in:
Hajime Hoshi 2018-11-09 01:39:49 +09:00
parent 03c800cb9b
commit dfb63852c2
1 changed files with 4 additions and 34 deletions
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38
image.go
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@ -331,46 +331,16 @@ func (i *Image) drawImage(img *Image, options *DrawImageOptions) {
}
bounds := img.Bounds()
sx0, sy0, sx1, sy1 := bounds.Min.X, bounds.Min.Y, bounds.Max.X, bounds.Max.Y
// SourceRect is deprecated. This implementation is for backward compatibility.
if options.SourceRect != nil {
r := bounds.Intersect(*options.SourceRect)
if r.Empty() {
bounds = bounds.Intersect(*options.SourceRect)
if bounds.Empty() {
return
}
if sx0 < r.Min.X {
sx0 = r.Min.X
}
if sy0 < r.Min.Y {
sy0 = r.Min.Y
}
if sx1 > r.Max.X {
sx1 = r.Max.X
}
if sy1 > r.Max.Y {
sy1 = r.Max.Y
}
}
geom := &options.GeoM
if sx0 < 0 || sy0 < 0 {
dx := 0.0
dy := 0.0
if sx0 < 0 {
dx = -float64(sx0)
sx0 = 0
}
if sy0 < 0 {
dy = -float64(sy0)
sy0 = 0
}
geom = &GeoM{}
geom.Translate(dx, dy)
geom.Concat(options.GeoM)
}
mode := graphics.CompositeMode(options.CompositeMode)
filter := graphics.FilterNearest
@ -414,10 +384,10 @@ func (i *Image) drawImage(img *Image, options *DrawImageOptions) {
if level == 0 {
src := img.mipmap.original()
vs := src.QuadVertices(sx0, sy0, sx1, sy1, a, b, c, d, tx, ty, cr, cg, cb, ca)
vs := src.QuadVertices(bounds.Min.X, bounds.Min.Y, bounds.Max.X, bounds.Max.Y, a, b, c, d, tx, ty, cr, cg, cb, ca)
is := graphics.QuadIndices()
i.mipmap.original().DrawImage(src, vs, is, colorm, mode, filter)
} else if src := img.mipmap.level(image.Rect(sx0, sy0, sx1, sy1), level); src != nil {
} else if src := img.mipmap.level(bounds, level); src != nil {
w, h := src.Size()
s := 1 << uint(level)
a *= float32(s)