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https://github.com/hajimehoshi/ebiten.git
synced 2024-12-24 10:48:53 +01:00
internal/restorable: remove clearIfOverlapped
We found clearIfOverlapped could be a heavy task in some actual applications. Instead of clearing existing data in the pixels records, add a new record with a nil slice which indicates a cleared region.
This commit is contained in:
parent
47f19da710
commit
0f4066e7ac
@ -244,9 +244,6 @@ func (i *Image) makeStale(rect image.Rectangle) {
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// Clear pixels to save memory.
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// Clear pixels to save memory.
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for _, r := range addedRegions {
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for _, r := range addedRegions {
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if r.Empty() {
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continue
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}
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i.basePixels.Clear(r)
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i.basePixels.Clear(r)
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}
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}
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@ -26,25 +26,6 @@ type pixelsRecord struct {
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pix []byte
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pix []byte
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}
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}
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func (p *pixelsRecord) clearIfOverlapped(rect image.Rectangle) {
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r := p.rect.Intersect(rect)
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if r.Empty() {
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return
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}
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ox := r.Min.X - p.rect.Min.X
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oy := r.Min.Y - p.rect.Min.Y
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w := p.rect.Dx()
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for j := 0; j < r.Dy(); j++ {
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for i := 0; i < r.Dx(); i++ {
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idx := 4 * ((oy+j)*w + ox + i)
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p.pix[idx] = 0
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p.pix[idx+1] = 0
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p.pix[idx+2] = 0
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p.pix[idx+3] = 0
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}
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}
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}
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func (p *pixelsRecord) readPixels(pixels []byte, region image.Rectangle, imageWidth, imageHeight int) {
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func (p *pixelsRecord) readPixels(pixels []byte, region image.Rectangle, imageWidth, imageHeight int) {
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r := p.rect.Intersect(region.Intersect(image.Rect(0, 0, imageWidth, imageHeight)))
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r := p.rect.Intersect(region.Intersect(image.Rect(0, 0, imageWidth, imageHeight)))
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if r.Empty() {
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if r.Empty() {
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@ -56,10 +37,19 @@ func (p *pixelsRecord) readPixels(pixels []byte, region image.Rectangle, imageWi
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srcBaseX := r.Min.X - p.rect.Min.X
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srcBaseX := r.Min.X - p.rect.Min.X
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srcBaseY := r.Min.Y - p.rect.Min.Y
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srcBaseY := r.Min.Y - p.rect.Min.Y
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lineWidth := 4 * r.Dx()
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lineWidth := 4 * r.Dx()
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for j := 0; j < r.Dy(); j++ {
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if p.pix != nil {
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dstX := 4 * ((dstBaseY+j)*region.Dx() + dstBaseX)
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for j := 0; j < r.Dy(); j++ {
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srcX := 4 * ((srcBaseY+j)*p.rect.Dx() + srcBaseX)
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dstX := 4 * ((dstBaseY+j)*region.Dx() + dstBaseX)
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copy(pixels[dstX:dstX+lineWidth], p.pix[srcX:srcX+lineWidth])
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srcX := 4 * ((srcBaseY+j)*p.rect.Dx() + srcBaseX)
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copy(pixels[dstX:dstX+lineWidth], p.pix[srcX:srcX+lineWidth])
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}
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} else {
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for j := 0; j < r.Dy(); j++ {
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dstX := 4 * ((dstBaseY+j)*region.Dx() + dstBaseX)
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for i := 0; i < lineWidth; i++ {
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pixels[i+dstX] = 0
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}
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}
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}
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}
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}
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}
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@ -98,12 +88,19 @@ func (pr *pixelsRecords) addOrReplace(pixels []byte, region image.Rectangle) {
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}
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}
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func (pr *pixelsRecords) clear(region image.Rectangle) {
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func (pr *pixelsRecords) clear(region image.Rectangle) {
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if region.Empty() {
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return
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}
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var n int
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var n int
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var needsClear bool
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for _, r := range pr.records {
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for _, r := range pr.records {
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if r.rect.In(region) {
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if r.rect.In(region) {
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continue
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continue
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}
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}
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r.clearIfOverlapped(region)
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if r.rect.Overlaps(region) {
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needsClear = true
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}
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pr.records[n] = r
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pr.records[n] = r
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n++
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n++
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}
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}
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@ -111,6 +108,11 @@ func (pr *pixelsRecords) clear(region image.Rectangle) {
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pr.records[i] = nil
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pr.records[i] = nil
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}
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}
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pr.records = pr.records[:n]
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pr.records = pr.records[:n]
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if needsClear {
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pr.records = append(pr.records, &pixelsRecord{
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rect: region,
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})
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}
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}
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}
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func (pr *pixelsRecords) readPixels(pixels []byte, region image.Rectangle, imageWidth, imageHeight int) {
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func (pr *pixelsRecords) readPixels(pixels []byte, region image.Rectangle, imageWidth, imageHeight int) {
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@ -125,7 +127,11 @@ func (pr *pixelsRecords) readPixels(pixels []byte, region image.Rectangle, image
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func (pr *pixelsRecords) apply(img *graphicscommand.Image) {
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func (pr *pixelsRecords) apply(img *graphicscommand.Image) {
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// TODO: Isn't this too heavy? Can we merge the operations?
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// TODO: Isn't this too heavy? Can we merge the operations?
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for _, r := range pr.records {
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for _, r := range pr.records {
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img.WritePixels(r.pix, r.rect)
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if r.pix != nil {
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img.WritePixels(r.pix, r.rect)
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} else {
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img.WritePixels(make([]byte, 4*r.rect.Dx()*r.rect.Dy()), r.rect)
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}
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}
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}
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}
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}
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