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graphics: Avoid ReadPixels when the image is volatile

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This commit is contained in:
Hajime Hoshi 2016-07-27 03:09:56 +09:00
parent 3724815f21
commit b901d2acb1
1 changed files with 4 additions and 1 deletions
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5
imageimpl.go
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@ -194,6 +194,9 @@ func (i *imageImpl) ensurePixels(context *opengl.Context) error {
if i.disposed {
return nil
}
if i.volatile {
return nil
}
if err := i.pixels.ReadPixelsFromVRAMIfStale(context); err != nil {
return err
}
@ -217,7 +220,7 @@ func (i *imageImpl) resetPixelsIfDependingOn(target *imageImpl, context *opengl.
if !i.pixels.DependsOn(target.image) {
return nil
}
if context == nil {
if context == nil || i.volatile {
// context is nil when this is not initialized yet.
i.pixels.MakeStale()
return nil