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internal/restorable: add TestDrawTrianglesAndExtend

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This commit is contained in:
Hajime Hoshi 2023-02-28 09:06:41 -08:00
parent 42aa5fa604
commit 8f3974eeba
1 changed files with 51 additions and 0 deletions
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51
internal/restorable/images_test.go
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@ -888,6 +888,57 @@ func TestExtend(t *testing.T) {
}
}
func TestDrawTrianglesAndExtend(t *testing.T) {
pixAt := func(i, j int) byte {
return byte(17*i + 13*j + 0x40)
}
const w, h = 16, 16
src := restorable.NewImage(w, h, restorable.ImageTypeRegular)
pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := j*w + i
v := pixAt(i, j)
pix[4*idx] = v
pix[4*idx+1] = v
pix[4*idx+2] = v
pix[4*idx+3] = v
}
}
src.WritePixels(pix, 0, 0, w, h)
orig := restorable.NewImage(w, h, restorable.ImageTypeRegular)
vs := quadVertices(src, w, h, 0, 0)
is := graphics.QuadIndices()
dr := graphicsdriver.Region{
X: 0,
Y: 0,
Width: w,
Height: h,
}
orig.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, [graphics.ShaderImageCount - 1][2]float32{}, vs, is, graphicsdriver.BlendSourceOver, dr, graphicsdriver.Region{}, restorable.NearestFilterShader, nil, false)
extended := orig.Extend(w*2, h*2) // After this, orig is already disposed.
result := make([]byte, 4*(w*2)*(h*2))
if err := extended.ReadPixels(ui.GraphicsDriverForTesting(), result, 0, 0, w*2, h*2); err != nil {
t.Fatal(err)
}
for j := 0; j < h*2; j++ {
for i := 0; i < w*2; i++ {
got := result[4*(j*(w*2)+i)]
want := byte(0)
if i < w && j < h {
want = pixAt(i, j)
}
if got != want {
t.Errorf("extended.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestClearPixels(t *testing.T) {
const w, h = 16, 16
img := restorable.NewImage(w, h, restorable.ImageTypeRegular)