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graphics: Add TestImageDrawTrianglesAndMutateArgs

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This commit is contained in:
Hajime Hoshi 2019-09-18 23:52:11 +09:00
parent cdddf48f89
commit 2621681a2a
1 changed files with 66 additions and 0 deletions
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66
image_test.go
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@ -1785,3 +1785,69 @@ func TestImageFillingAndEdges(t *testing.T) {
}
}
}
func TestImageDrawTrianglesAndMutateArgs(t *testing.T) {
const w, h = 16, 16
dst, _ := NewImage(w, h, FilterDefault)
src, _ := NewImage(w, h, FilterDefault)
clr := color.RGBA{0xff, 0, 0, 0xff}
src.Fill(clr)
vs := []Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: h,
SrcX: w,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
is := []uint16{0, 1, 2, 1, 2, 3}
dst.DrawTriangles(vs, is, src, nil)
vs[0].SrcX = w
vs[0].SrcY = h
is[5] = 0
for j := 0; j < w; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j)
want := clr
if got != want {
t.Errorf("dst.At(%d, %d): got %v, want %v", i, j, got, want)
}
}
}
}