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internal/restorable: bug fix: pixel info was unexpectedly lost

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This commit is contained in:
Hajime Hoshi 2023-02-25 02:43:58 +09:00
parent e36007a3a3
commit 0755523776
2 changed files with 34 additions and 1 deletions
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2
internal/restorable/image.go
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@ -494,9 +494,9 @@ func (i *Image) makeStaleIfDependingOnShader(shader *Shader) {
// readPixelsFromGPU reads the pixels from GPU and resolves the image's 'stale' state.
func (i *Image) readPixelsFromGPU(graphicsDriver graphicsdriver.Graphics) error {
i.basePixels = Pixels{}
var r image.Rectangle
if i.stale {
i.basePixels = Pixels{}
r = i.staleRegion
} else {
for _, d := range i.drawTrianglesHistory {

33
internal/restorable/images_test.go
View File

@ -1129,3 +1129,36 @@ func TestDrawTrianglesAndReadPixels(t *testing.T) {
t.Errorf("got: %v, want: %v", got, want)
}
}
func TestWritePixelsAndDrawTriangles(t *testing.T) {
src := restorable.NewImage(1, 1, restorable.ImageTypeRegular)
dst := restorable.NewImage(2, 1, restorable.ImageTypeRegular)
src.WritePixels([]byte{0x80, 0x80, 0x80, 0x80}, 0, 0, 1, 1)
// Call WritePixels first.
dst.WritePixels([]byte{0x40, 0x40, 0x40, 0x40}, 0, 0, 1, 1)
// Call DrawTriangles at a different region second.
vs := quadVertices(src, 1, 1, 1, 0)
is := graphics.QuadIndices()
dr := graphicsdriver.Region{
X: 1,
Y: 0,
Width: 1,
Height: 1,
}
dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, [graphics.ShaderImageCount - 1][2]float32{}, vs, is, graphicsdriver.BlendSourceOver, dr, graphicsdriver.Region{}, restorable.NearestFilterShader, nil, false)
// Get the pixels.
pix := make([]byte, 4*2*1)
if err := dst.ReadPixels(ui.GraphicsDriverForTesting(), pix, 0, 0, 2, 1); err != nil {
t.Fatal(err)
}
if got, want := (color.RGBA{R: pix[0], G: pix[1], B: pix[2], A: pix[3]}), (color.RGBA{R: 0x40, G: 0x40, B: 0x40, A: 0x40}); !sameColors(got, want, 1) {
t.Errorf("got: %v, want: %v", got, want)
}
if got, want := (color.RGBA{R: pix[4], G: pix[5], B: pix[6], A: pix[7]}), (color.RGBA{R: 0x80, G: 0x80, B: 0x80, A: 0x80}); !sameColors(got, want, 1) {
t.Errorf("got: %v, want: %v", got, want)
}
}