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internal/restorable: bug fix: no pixels were read only with DrawTriangles

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Closes #2324
This commit is contained in:
Hajime Hoshi 2022-09-14 02:17:12 +09:00
parent 0f00eac24c
commit 6179158812
2 changed files with 32 additions and 1 deletions
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6
internal/restorable/image.go
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@ -491,7 +491,11 @@ 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{}
if r := i.staleRegion; !r.Empty() {
r := i.staleRegion
if len(i.drawTrianglesHistory) > 0 {
r = image.Rect(0, 0, i.width, i.height)
}
if !r.Empty() {
pix := make([]byte, 4*r.Dx()*r.Dy())
if err := i.image.ReadPixels(graphicsDriver, pix, r.Min.X, r.Min.Y, r.Dx(), r.Dy()); err != nil {
return err

27
internal/restorable/images_test.go
View File

@ -1073,3 +1073,30 @@ func TestOverlappedPixels(t *testing.T) {
}
}
}
// Issue #2324
func TestDrawTrianglesAndReadPixels(t *testing.T) {
const w, h = 1, 1
src := restorable.NewImage(w, h, restorable.ImageTypeRegular)
dst := restorable.NewImage(w, h, restorable.ImageTypeRegular)
src.WritePixels([]byte{0x80, 0x80, 0x80, 0x80}, 0, 0, 1, 1)
vs := quadVertices(src, w, h, 0, 0)
is := graphics.QuadIndices()
dr := graphicsdriver.Region{
X: 0,
Y: 0,
Width: w,
Height: h,
}
dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, [graphics.ShaderImageCount - 1][2]float32{}, vs, is, affine.ColorMIdentity{}, graphicsdriver.CompositeModeSourceOver, graphicsdriver.FilterNearest, graphicsdriver.AddressUnsafe, dr, graphicsdriver.Region{}, nil, nil, false)
pix := make([]byte, 4*w*h)
if err := dst.ReadPixels(ui.GraphicsDriverForTesting(), pix, 0, 0, w, h); err != nil {
t.Fatal(err)
}
if got, want := (color.RGBA{pix[0], pix[1], pix[2], pix[3]}), (color.RGBA{0x80, 0x80, 0x80, 0x80}); !sameColors(got, want, 1) {
t.Errorf("got: %v, want: %v", got, want)
}
}