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internal/restorable: resolve a stale state when possible

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This commit is contained in:
Hajime Hoshi 2024-09-08 12:56:42 +09:00
parent 30a2817ab5
commit 4824dc0360
2 changed files with 63 additions and 5 deletions
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35
image.go
View File

@ -267,7 +267,31 @@ func (i *Image) DrawImage(img *Image, options *DrawImageOptions) {
})
}
i.image.DrawTriangles(srcs, vs, is, blend, i.adjustedBounds(), [graphics.ShaderSrcImageCount]image.Rectangle{img.adjustedBounds()}, shader.shader, i.tmpUniforms, graphicsdriver.FillRuleFillAll, canSkipMipmap(geoM, filter), false, restorable.HintNone)
dr := i.adjustedBounds()
hint := restorable.HintNone
if overwritesDstRegion(options.Blend, dr, geoM, sx0, sy0, sx1, sy1) {
hint = restorable.HintOverwriteDstRegion
}
i.image.DrawTriangles(srcs, vs, is, blend, dr, [graphics.ShaderSrcImageCount]image.Rectangle{img.adjustedBounds()}, shader.shader, i.tmpUniforms, graphicsdriver.FillRuleFillAll, canSkipMipmap(geoM, filter), false, hint)
}
// overwritesDstRegion reports whether the given parameters overwrite the destination region completely.
func overwritesDstRegion(blend Blend, dstRegion image.Rectangle, geoM GeoM, sx0, sy0, sx1, sy1 int) bool {
if blend != BlendCopy {
return false
}
// Check the result vertices is not a rotated rectangle.
if geoM.b != 0 || geoM.c != 0 {
return false
}
// Check the result vertices completely covers dstRegion.
x0, y0 := geoM.Apply(float64(sx0), float64(sy0))
x1, y1 := geoM.Apply(float64(sx1), float64(sy1))
if float64(dstRegion.Min.X) < x0 || float64(dstRegion.Min.Y) < y0 || float64(dstRegion.Max.X) > x1 || float64(dstRegion.Max.Y) > y1 {
return false
}
return true
}
// Vertex represents a vertex passed to DrawTriangles.
@ -856,7 +880,14 @@ func (i *Image) DrawRectShader(width, height int, shader *Shader, options *DrawR
i.tmpUniforms = i.tmpUniforms[:0]
i.tmpUniforms = shader.appendUniforms(i.tmpUniforms, options.Uniforms)
i.image.DrawTriangles(imgs, vs, is, blend, i.adjustedBounds(), srcRegions, shader.shader, i.tmpUniforms, graphicsdriver.FillRuleFillAll, true, false, restorable.HintNone)
dr := i.adjustedBounds()
hint := restorable.HintNone
// Do not use srcRegions[0].Dx() and srcRegions[0].Dy() as these might be empty.
if overwritesDstRegion(options.Blend, dr, geoM, srcRegions[0].Min.X, srcRegions[0].Min.Y, srcRegions[0].Min.X+width, srcRegions[0].Min.Y+height) {
hint = restorable.HintOverwriteDstRegion
}
i.image.DrawTriangles(imgs, vs, is, blend, i.adjustedBounds(), srcRegions, shader.shader, i.tmpUniforms, graphicsdriver.FillRuleFillAll, true, false, hint)
}
// SubImage returns an image representing the portion of the image p visible through r.

31
internal/restorable/image.go
View File

@ -347,10 +347,25 @@ func (i *Image) DrawTriangles(srcs [graphics.ShaderSrcImageCount]*Image, vertice
}
// Even if the image is already stale, call makeStale to extend the stale region.
if srcstale || !needsRestoration() || !i.needsRestoration() || i.stale {
if srcstale || !needsRestoration() || !i.needsRestoration() {
i.makeStale(dstRegion)
} else if i.stale {
var overwrite bool
if hint == HintOverwriteDstRegion {
overwrite = i.areStaleRegionsIncludedIn(dstRegion)
}
if overwrite {
i.basePixels.Clear(dstRegion)
i.clearDrawTrianglesHistory()
i.stale = false
i.staleRegions = i.staleRegions[:0]
} else {
// TODO: Consider overwritten.
// Even if the image is already stale, call makeStale to extend the stale region.
i.makeStale(dstRegion)
}
}
if !i.stale {
i.appendDrawTrianglesHistory(srcs, vertices, indices, blend, dstRegion, srcRegions, shader, uniforms, fillRule, hint)
}
@ -364,6 +379,18 @@ func (i *Image) DrawTriangles(srcs [graphics.ShaderSrcImageCount]*Image, vertice
i.image.DrawTriangles(imgs, vertices, indices, blend, dstRegion, srcRegions, shader.shader, uniforms, fillRule)
}
func (i *Image) areStaleRegionsIncludedIn(r image.Rectangle) bool {
if !i.stale {
return false
}
for _, sr := range i.staleRegions {
if !sr.In(r) {
return false
}
}
return true
}
// appendDrawTrianglesHistory appends a draw-image history item to the image.
func (i *Image) appendDrawTrianglesHistory(srcs [graphics.ShaderSrcImageCount]*Image, vertices []float32, indices []uint32, blend graphicsdriver.Blend, dstRegion image.Rectangle, srcRegions [graphics.ShaderSrcImageCount]image.Rectangle, shader *Shader, uniforms []uint32, fillRule graphicsdriver.FillRule, hint Hint) {
if i.stale || !i.needsRestoration() {