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vector: adjust sub image sizes to encourage reusing cached sub images

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Updates #3275
This commit is contained in:
Hajime Hoshi
2025-07-19 22:36:18 +09:00
parent fb60c54510
commit 19fb372da8
1 changed files with 10 additions and 1 deletions
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11
vector/atlas.go
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@@ -43,6 +43,10 @@ func roundUpAtlasSize(size int) int {
return int(math.Ceil(math.Pow(1.5, math.Ceil(math.Log(float64(size))/math.Log(1.5)))))
}
func roundUp16(x int) int {
return (x + 15) &^ 15
}
func (a *atlas) setPaths(dstBounds image.Rectangle, paths []*Path, antialias bool) {
// Reset the members.
a.pathRenderingBounds = slices.Delete(a.pathRenderingBounds, 0, len(a.pathRenderingBounds))
@@ -56,7 +60,12 @@ func (a *atlas) setPaths(dstBounds image.Rectangle, paths []*Path, antialias boo
a.pathRenderingBounds = slices.Grow(a.pathRenderingBounds, len(paths))[:len(paths)]
for i, p := range paths {
a.pathRenderingBounds[i] = p.Bounds().Intersect(dstBounds)
b := p.Bounds().Intersect(dstBounds)
// Round up the size to 16px in order to encourage reusing sub image cache.
a.pathRenderingBounds[i] = image.Rectangle{
Min: b.Min,
Max: b.Min.Add(image.Pt(roundUp16(b.Dx()), roundUp16(b.Dy()))),
}
a.atlasRegions = append(a.atlasRegions, atlasRegion{
pathIndex: i,
})