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Add a basic MRT test

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This commit is contained in:
Zyko 2024-04-13 11:40:31 +02:00
parent 7dd4aa9150
commit 0b53525808
1 changed files with 83 additions and 0 deletions
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83
shader_test.go
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@ -2595,3 +2595,86 @@ func Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {
} }
} }
} }
// Issue #2930
func TestShaderMRT(t *testing.T) {
const w, h = 16, 16
s, err := ebiten.NewShader([]byte(`//kage:unit pixels
package main
func Fragment(dstPos vec4, srcPos vec2, color vec4) (vec4, vec4, vec4, vec4, vec4, vec4, vec4, vec4) {
return vec4(1, 0, 0, 1),
vec4(0, 1, 0, 1),
vec4(0, 0, 1, 1),
vec4(1, 0, 1, 1),
vec4(1, 1, 0, 1),
vec4(0, 1, 1, 1),
vec4(1, 1, 1, 1),
vec4(1, 1, 1, 0)
}
`))
if err != nil {
t.Fatal(err)
}
bounds := image.Rect(0, 0, w, h)
opts := &ebiten.NewImageOptions{
Unmanaged: true,
}
imgs := [8]*ebiten.Image{
ebiten.NewImageWithOptions(bounds, opts),
ebiten.NewImageWithOptions(bounds, opts),
ebiten.NewImageWithOptions(bounds, opts),
ebiten.NewImageWithOptions(bounds, opts),
ebiten.NewImageWithOptions(bounds, opts),
ebiten.NewImageWithOptions(bounds, opts),
ebiten.NewImageWithOptions(bounds, opts),
ebiten.NewImageWithOptions(bounds, opts),
}
vertices := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
},
{
DstX: w,
DstY: 0,
},
{
DstX: 0,
DstY: h,
},
{
DstX: w,
DstY: h,
},
}
indices := []uint16{0, 1, 2, 1, 2, 3}
t.Run("8 slots", func(t *testing.T) {
wantColors := [8]color.RGBA{
{R: 0xff, G: 0, B: 0, A: 0xff},
{R: 0, G: 0xff, B: 0, A: 0xff},
{R: 0, G: 0, B: 0xff, A: 0xff},
{R: 0xff, G: 0, B: 0xff, A: 0xff},
{R: 0xff, G: 0xff, B: 0, A: 0xff},
{R: 0, G: 0xff, B: 0xff, A: 0xff},
{R: 0xff, G: 0xff, B: 0xff, A: 0xff},
{R: 0xff, G: 0xff, B: 0xff, A: 0},
}
dsts := imgs
ebiten.DrawTrianglesShaderMRT(dsts, vertices, indices, s, nil)
for k, dst := range dsts {
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j).(color.RGBA)
want := wantColors[k]
if !sameColors(got, want, 1) {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
})
}