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restorable: Bug fix: Make limit to the number of draw-image command history (#349)

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This commit is contained in:
Hajime Hoshi 2017-05-03 22:15:59 +09:00
parent e8b155fefe
commit d94e9c9d86
2 changed files with 9 additions and 4 deletions
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2
image.go
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@ -72,7 +72,7 @@ func (i *images) resolveStalePixels(context *opengl.Context) error {
defer i.m.Unlock()
i.lastChecked = nil
for img := range i.images {
if err := img.ReadPixelsFromVRAMIfStale(context); err != nil {
if err := img.ResolveStalePixels(context); err != nil {
return err
}
}

11
internal/restorable/image.go
View File

@ -24,6 +24,8 @@ import (
"github.com/hajimehoshi/ebiten/internal/opengl"
)
const drawImageHistoryMax = 100
type drawImageHistoryItem struct {
image *Image
vertices []float32
@ -129,6 +131,10 @@ func (p *Image) appendDrawImageHistory(image *Image, vertices []float32, colorm
if p.stale {
return
}
if len(p.drawImageHistory)+1 > drawImageHistoryMax {
p.makeStale()
return
}
// All images must be resolved and not stale each after frame.
// So we don't have to care if image is stale or not here.
item := &drawImageHistoryItem{
@ -164,7 +170,6 @@ func (p *Image) MakeStaleIfDependingOn(target *Image) {
if p.stale {
return
}
// TODO: Performance is bad when drawImageHistory is too many.
for _, c := range p.drawImageHistory {
if c.image == target {
p.makeStale()
@ -185,7 +190,7 @@ func (p *Image) readPixelsFromVRAM(image *graphics.Image, context *opengl.Contex
return nil
}
func (p *Image) ReadPixelsFromVRAMIfStale(context *opengl.Context) error {
func (p *Image) ResolveStalePixels(context *opengl.Context) error {
if p.volatile {
return nil
}
@ -199,7 +204,7 @@ func (p *Image) HasDependency() bool {
if p.stale {
return false
}
return p.drawImageHistory != nil
return len(p.drawImageHistory) > 0
}
// Restore restores *graphics.Image from the pixels using its state.