Function encodePNGBytes

pkg/chat/attach_test.go:39–64

(w, h int, alpha bool)

}

func encodePNGBytes(w, h int, alpha bool) []byte {
	if alpha {
		img := image.NewNRGBA(image.Rect(0, 0, w, h))
		for y := range h {
			for x := range w {
				img.Set(x, y, color.NRGBA{R: 0, G: 128, B: 255, A: 128})
			}
		}
		var buf bytes.Buffer
		if err := png.Encode(&buf, img); err != nil {
			panic(err)
		}
		return buf.Bytes()
	}
	img := image.NewRGBA(image.Rect(0, 0, w, h))
	for y := range h {
		for x := range w {
			img.Set(x, y, color.RGBA{R: 0, G: 128, B: 255, A: 255})
		}
	}
	var buf bytes.Buffer
	if err := png.Encode(&buf, img); err != nil {
		panic(err)
	}
	return buf.Bytes()
}

func writeTempFile(t *testing.T, ext string, data []byte) string {
	t.Helper()