pq_test.go RawHistoryFolder

1package vulkan
2
3import (
4	"math"
5	"testing"
6)
7
8func TestPQMath(t *testing.T) {
9	white, green, blue := hdrPixel(1, 1, 1, 203)
10	if math.Abs(white-0.5806) > 0.002 || math.Abs(green-white) > 0.0001 || math.Abs(blue-white) > 0.0001 {
11		t.Fatalf("SDR white at 203 nits: %v %v %v", white, green, blue)
12	}
13	if pqEncode(0) != 0 || math.Abs(pqEncode(10000)-1) > 1e-9 {
14		t.Fatal("PQ endpoints")
15	}
16	p := []byte{255, 255, 255, 255}
17	hdrCursorPixel(p, 203)
18	if p[3] != 255 || math.Abs(float64(p[0])-148) > 1 || p[0] != p[1] || p[1] != p[2] {
19		t.Fatalf("cursor white: %v", p)
20	}
21}