1 files changed, 120 insertions, 0 deletions
diff --git a/src/pixman/test/rotate-test.c b/src/pixman/test/rotate-test.c
new file mode 100644
index 0000000..18ca60d
--- /dev/null
+++ b/src/pixman/test/rotate-test.c
@@ -0,0 +1,120 @@
+#include <stdlib.h>
+#include "utils.h"
+
+#define WIDTH	32
+#define HEIGHT	32
+
+static const pixman_format_code_t formats[] =
+{
+    PIXMAN_a8r8g8b8,
+    PIXMAN_a8b8g8r8,
+    PIXMAN_x8r8g8b8,
+    PIXMAN_x8b8g8r8,
+    PIXMAN_r5g6b5,
+    PIXMAN_b5g6r5,
+    PIXMAN_a8,
+    PIXMAN_a1,
+};
+
+static const pixman_op_t ops[] =
+{
+    PIXMAN_OP_OVER,
+    PIXMAN_OP_SRC,
+    PIXMAN_OP_ADD,
+};
+
+#define TRANSFORM(v00, v01, v10, v11)					\
+    { { { v00, v01, WIDTH * pixman_fixed_1 / 2 },			\
+        { v10, v11, HEIGHT * pixman_fixed_1 / 2 },			\
+	{ 0, 0, pixman_fixed_1 } } }
+
+#define F1 pixman_fixed_1
+
+static const pixman_transform_t transforms[] =
+{
+    TRANSFORM (0, -1, 1, 0),		/* wrong 90 degree rotation */
+    TRANSFORM (0, 1, -1, 0),		/* wrong 270 degree rotation */
+    TRANSFORM (1, 0, 0, 1),		/* wrong identity */
+    TRANSFORM (-1, 0, 0, -1),		/* wrong 180 degree rotation */
+    TRANSFORM (0, -F1, F1, 0),		/* correct 90 degree rotation */
+    TRANSFORM (0, F1, -F1, 0),		/* correct 270 degree rotation */
+    TRANSFORM (F1, 0, 0, F1),		/* correct identity */
+    TRANSFORM (-F1, 0, 0, -F1),		/* correct 180 degree rotation */
+};
+
+#define RANDOM_FORMAT()							\
+    (formats[prng_rand_n (ARRAY_LENGTH (formats))])
+
+#define RANDOM_OP()							\
+    (ops[prng_rand_n (ARRAY_LENGTH (ops))])
+
+#define RANDOM_TRANSFORM()						\
+    (&(transforms[prng_rand_n (ARRAY_LENGTH (transforms))]))
+
+static void
+on_destroy (pixman_image_t *image, void *data)
+{
+    free (data);
+}
+
+static pixman_image_t *
+make_image (void)
+{
+    pixman_format_code_t format = RANDOM_FORMAT();
+    uint32_t *bytes, *orig;
+    pixman_image_t *image;
+    int stride;
+
+    orig = bytes = malloc (WIDTH * HEIGHT * 4);
+    prng_randmemset (bytes, WIDTH * HEIGHT * 4, 0);
+
+    stride = WIDTH * 4;
+    if (prng_rand_n (2) == 0)
+    {
+	bytes += (stride / 4) * (HEIGHT - 1);
+	stride = - stride;
+    }
+
+    image = pixman_image_create_bits (
+	format, WIDTH, HEIGHT, bytes, stride);
+
+    pixman_image_set_transform (image, RANDOM_TRANSFORM());
+    pixman_image_set_destroy_function (image, on_destroy, orig);
+    pixman_image_set_repeat (image, PIXMAN_REPEAT_NORMAL);
+
+    image_endian_swap (image);
+
+    return image;
+}
+
+static uint32_t
+test_transform (int testnum, int verbose)
+{
+    pixman_image_t *src, *dest;
+    uint32_t crc;
+
+    prng_srand (testnum);
+    
+    src = make_image ();
+    dest = make_image ();
+
+    pixman_image_composite (RANDOM_OP(),
+			    src, NULL, dest,
+			    0, 0, 0, 0, WIDTH / 2, HEIGHT / 2,
+			    WIDTH, HEIGHT);
+
+    crc = compute_crc32_for_image (0, dest);
+
+    pixman_image_unref (src);
+    pixman_image_unref (dest);
+
+    return crc;
+}
+
+int
+main (int argc, const char *argv[])
+{
+    return fuzzer_test_main ("rotate", 15000,
+			     0x81E9EC2F,
+			     test_transform, argc, argv);
+}