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internal/atlas: bug fix: too aggressive counting up destinationCount

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Closes #2586
This commit is contained in:
Hajime Hoshi 2023-03-02 18:58:24 +09:00
parent 7c10e48afd
commit 1c09ec5e44
2 changed files with 14 additions and 6 deletions
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12
internal/atlas/image.go
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@ -220,11 +220,9 @@ type Image struct {
// WritePixels doesn't affect this value since WritePixels can be done on images on an atlas.
usedAsSourceCount int
// destinationCount represents how many times an image on an atlas is used as a rendering destination at DrawTriangles.
// destinationCount represents how many times an image switches its backend when the image is used
// as a rendering destination at DrawTriangles.
// destinationCount affects the calculation when to put the image onto a texture atlas again.
//
// The current counting way is derived from the old implementation in which a destination image was always isolated
// e.g. not on an atlas. This might have to be revisited.
destinationCount int
}
@ -281,8 +279,6 @@ func (i *Image) ensureIsolatedFromSource(backends []*backend) {
return
}
i.destinationCount++
// Check if i has the same backend as the given backends.
var needsIsolation bool
for _, b := range backends {
@ -322,6 +318,10 @@ func (i *Image) ensureIsolatedFromSource(backends []*backend) {
delete(theSourceBackendsForOneFrame, origBackend)
newI.moveTo(i)
// Count up only when the backend is switched. (#2586).
// This counting up must be done after moveTo.
i.destinationCount++
}
func (i *Image) putOnSourceBackend(graphicsDriver graphicsdriver.Graphics) error {

8
internal/atlas/image_test.go
View File

@ -213,6 +213,14 @@ func TestReputOnSourceBackend(t *testing.T) {
t.Errorf("got: %v, want: %v", got, want)
}
}
// Finally, img1 is on a source backend.
if err := atlas.PutImagesOnSourceBackendForTesting(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
img0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{img1}, vs, is, graphicsdriver.BlendCopy, dr, graphicsdriver.Region{}, [graphics.ShaderImageCount - 1][2]float32{}, atlas.NearestFilterShader, nil, false)
if got, want := img1.IsOnSourceBackendForTesting(), true; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
if err := atlas.PutImagesOnSourceBackendForTesting(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}