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internal/atlas: add a test for a bug fix

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Closes #2728
This commit is contained in:
Hajime Hoshi 2023-08-19 01:36:01 +09:00
parent ea1f596cda
commit 77fd15145b
1 changed files with 35 additions and 0 deletions
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35
internal/atlas/image_test.go
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@ -791,4 +791,39 @@ func TestPowerOf2(t *testing.T) {
}
}
func TestDestinationCountOverflow(t *testing.T) {
const w, h = 256, 256
src := atlas.NewImage(w, h, atlas.ImageTypeRegular)
defer src.MarkDisposed()
dst0 := atlas.NewImage(w, h, atlas.ImageTypeRegular)
defer dst0.MarkDisposed()
dst1 := atlas.NewImage(w, h, atlas.ImageTypeRegular)
defer dst1.MarkDisposed()
vs := quadVertices(w, h, 0, 0, 1)
is := graphics.QuadIndices()
dr := graphicsdriver.Region{
X: 0,
Y: 0,
Width: w,
Height: h,
}
// Use dst0 as a destination for a while.
for i := 0; i < 31; i++ {
dst0.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, graphicsdriver.Region{}, [graphics.ShaderImageCount - 1][2]float32{}, atlas.NearestFilterShader, nil, false)
atlas.PutImagesOnSourceBackendForTesting(ui.GraphicsDriverForTesting())
}
// Use dst0 as a source for a while.
// As dst0 is used as a destination too many times (31 is a maximum), dst0's backend should never be a source backend.
for i := 0; i < 100; i++ {
dst1.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{dst0}, vs, is, graphicsdriver.BlendCopy, dr, graphicsdriver.Region{}, [graphics.ShaderImageCount - 1][2]float32{}, atlas.NearestFilterShader, nil, false)
atlas.PutImagesOnSourceBackendForTesting(ui.GraphicsDriverForTesting())
if dst0.IsOnSourceBackendForTesting() {
t.Errorf("dst0 cannot be on a source backend: %d", i)
}
}
}
// TODO: Add tests to extend image on an atlas out of the main loop