1 files changed, 35 insertions, 0 deletions
diff --git a/qemu/pixman/test/alpha-loop.c b/qemu/pixman/test/alpha-loop.c
new file mode 100644
index 000000000..4d4384d00
--- /dev/null
+++ b/qemu/pixman/test/alpha-loop.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "utils.h"
+
+#define WIDTH 400
+#define HEIGHT 200
+
+int
+main (int argc, char **argv)
+{
+    pixman_image_t *a, *d, *s;
+    uint8_t *alpha;
+    uint32_t *src, *dest;
+
+    prng_srand (0);
+
+    alpha = make_random_bytes (WIDTH * HEIGHT);
+    src = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
+    dest = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
+
+    a = pixman_image_create_bits (PIXMAN_a8, WIDTH, HEIGHT, (uint32_t *)alpha, WIDTH);
+    d = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, dest, WIDTH * 4);
+    s = pixman_image_create_bits (PIXMAN_a2r10g10b10, WIDTH, HEIGHT, src, WIDTH * 4);
+
+    fail_after (5, "Infinite loop detected: 5 seconds without progress\n");
+
+    pixman_image_set_alpha_map (s, a, 0, 0);
+    pixman_image_set_alpha_map (a, s, 0, 0);
+
+    pixman_image_composite (PIXMAN_OP_SRC, s, NULL, d, 0, 0, 0, 0, 0, 0, WIDTH, HEIGHT);
+
+    pixman_image_unref (s);
+
+    return 0;
+}