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internal/restorable: remove draw-triangles history items at WritePixels

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This commit is contained in:
Hajime Hoshi 2024-09-08 18:17:23 +09:00
parent f32648b144
commit bbe3cba110
1 changed files with 24 additions and 16 deletions
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40
internal/restorable/image.go
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@ -295,9 +295,9 @@ func (i *Image) WritePixels(pixels *graphics.ManagedBytes, region image.Rectangl
if region.Eq(image.Rect(0, 0, w, h)) {
if pixels != nil {
// Clone a ManagedBytes as the package graphicscommand has a different lifetime management.
i.basePixels.AddOrReplace(pixels.Clone(), image.Rect(0, 0, w, h))
i.basePixels.AddOrReplace(pixels.Clone(), region)
} else {
i.basePixels.Clear(image.Rect(0, 0, w, h))
i.basePixels.Clear(region)
}
i.clearDrawTrianglesHistory()
i.stale = false
@ -311,6 +311,8 @@ func (i *Image) WritePixels(pixels *graphics.ManagedBytes, region image.Rectangl
return
}
i.removeDrawTrianglesHistoryItems(region)
// Records for DrawTriangles cannot come before records for WritePixels.
if len(i.drawTrianglesHistory) > 0 {
i.makeStale(region)
@ -400,6 +402,25 @@ func (i *Image) areStaleRegionsIncludedIn(r image.Rectangle) bool {
return true
}
// removeDrawTrianglesHistoryItems removes draw-image history items whose destination regions are in the given region.
// This is useful when the destination region is overwritten soon later.
func (i *Image) removeDrawTrianglesHistoryItems(region image.Rectangle) {
for idx, c := range i.drawTrianglesHistory {
if c.dstRegion.In(region) {
i.drawTrianglesHistory[idx] = nil
}
}
var n int
for _, c := range i.drawTrianglesHistory {
if c == nil {
continue
}
i.drawTrianglesHistory[n] = c
n++
}
i.drawTrianglesHistory = i.drawTrianglesHistory[:n]
}
// 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() {
@ -411,20 +432,7 @@ func (i *Image) appendDrawTrianglesHistory(srcs [graphics.ShaderSrcImageCount]*I
// If the command overwrites the destination region, remove the history items that are in the region.
if hint == HintOverwriteDstRegion {
for idx, c := range i.drawTrianglesHistory {
if c.dstRegion.In(dstRegion) {
i.drawTrianglesHistory[idx] = nil
}
}
var n int
for _, c := range i.drawTrianglesHistory {
if c == nil {
continue
}
i.drawTrianglesHistory[n] = c
n++
}
i.drawTrianglesHistory = i.drawTrianglesHistory[:n]
i.removeDrawTrianglesHistoryItems(dstRegion)
}
// TODO: Would it be possible to merge draw image history items?