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pixels: Ensure pixels is not stale when restoring

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This commit is contained in:
Hajime Hoshi 2016-07-27 02:25:08 +09:00
parent e0894879f1
commit 459046f52a
1 changed files with 4 additions and 0 deletions
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4
internal/pixels/pixels.go
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@ -15,6 +15,7 @@
package pixels
import (
"errors"
"image"
"image/color"
@ -148,6 +149,9 @@ func (p *Pixels) HasDependency() bool {
//
// Restore is the only function that the pixel data is not present on GPU when this is called.
func (p *Pixels) Restore(context *opengl.Context, width, height int, filter opengl.Filter) (*graphics.Image, error) {
if p.stale {
return nil, errors.New("pixels: pixels must not be stale when restoring")
}
img := image.NewRGBA(image.Rect(0, 0, width, height))
if p.basePixels != nil {
for j := 0; j < height; j++ {