1package vulkan
2
3import (
4 "image/color"
5 "math"
6 "testing"
7
8 "github.com/bnema/neferwl/internal/ports"
9)
10
11// The target of a rotated output holds the scene transformed by ToBuffer:
12// every scene pixel of a window lands on the target pixel ToBuffer names,
13// for all eight transforms, and the rest of the target stays background.
14func TestRendererOutputTransform(t *testing.T) {
15 const tw, th = 6, 4
16 r, err := New(tw, th)
17 if err != nil {
18 t.Skipf("Vulkan unavailable: %v", err)
19 }
20 defer r.Close()
21 red, green := color.RGBA{255, 0, 0, 255}, color.RGBA{0, 255, 0, 255}
22 px := []byte{0, 0, 255, 255, 0, 255, 0, 255} // BGRA: red, green
23 win := ports.Rect{X: 1, Y: 0, W: 2, H: 1}
24 for tr := ports.BufferTransform(0); tr < 8; tr++ {
25 sw, sh := r.sceneSize(tr)
26 c := shmContent(t, 2, 1, 8, px)
27 scene := ports.Scene{Transform: tr, Scale: 1, OutputWidth: sw, OutputHeight: sh, Background: "#000000", Windows: []ports.SceneWindow{{ID: 1, Rect: win}}}
28 if err := render(r, scene, map[ports.WindowID]ports.SurfaceContent{1: *c}); err != nil {
29 t.Fatal(err)
30 }
31 img := readPixels(t, r)
32 want := map[[2]int]color.RGBA{}
33 for i, col := range []color.RGBA{red, green} {
34 bx, by := tr.ToBuffer(float64(win.X+i)+0.5, 0.5, float64(sw), float64(sh))
35 want[[2]int{int(math.Floor(bx)), int(math.Floor(by))}] = col
36 }
37 for y := range th {
38 for x := range tw {
39 w, ok := want[[2]int{x, y}]
40 if !ok {
41 w = color.RGBA{0, 0, 0, 255}
42 }
43 if got := img.RGBAAt(x, y); !near(got, w, 2) {
44 t.Errorf("transform %d: target (%d,%d) = %v, want %v", tr, x, y, got, w)
45 }
46 }
47 }
48 }
49}