From: Søren Sandmann Pedersen <s...@redhat.com>
This program exercises a bug in pixman-image.c where "-1" and "1" were
used instead of the correct "- pixman_fixed_1" and "pixman_fixed_1".
With the fast implementation enabled:
% ./rotate-test
rotate test failed! (checksum=672ED720, expected 721947E4)
Without it:
% env PIXMAN_DISABLE=fast ./rotate-test
pixman: Disabled fast implementation
rotate test passed (checksum=721947E4)
---
test/Makefile.sources | 1 +
test/rotate-test.c | 112 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 113 insertions(+), 0 deletions(-)
create mode 100644 test/rotate-test.c
diff --git a/test/Makefile.sources b/test/Makefile.sources
index fad8c6f..3e37e32 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -5,6 +5,7 @@ TESTPROGRAMS = \
region-test \
region-translate-test \
fetch-test \
+ rotate-test \
oob-test \
trap-crasher \
alpha-loop \
diff --git a/test/rotate-test.c b/test/rotate-test.c
new file mode 100644
index 0000000..dabdf8e
--- /dev/null
+++ b/test/rotate-test.c
@@ -0,0 +1,112 @@
+#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[lcg_rand_n (ARRAY_LENGTH (formats))])
+
+#define RANDOM_OP() \
+ (ops[lcg_rand_n (ARRAY_LENGTH (ops))])
+
+#define RANDOM_TRANSFORM() \
+ (&(transforms[lcg_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 = malloc (WIDTH * HEIGHT * 4);
+ pixman_image_t *image;
+ int i;
+
+ for (i = 0; i < WIDTH * HEIGHT * 4; ++i)
+ ((uint8_t *)bytes)[i] = lcg_rand_n (256);
+
+ image = pixman_image_create_bits (
+ format, WIDTH, HEIGHT, bytes, WIDTH * 4);
+
+ pixman_image_set_transform (image, RANDOM_TRANSFORM());
+ pixman_image_set_destroy_function (image, on_destroy, bytes);
+ pixman_image_set_repeat (image, PIXMAN_REPEAT_NORMAL);
+
+ return image;
+}
+
+static uint32_t
+test_transform (int testnum, int verbose)
+{
+ pixman_image_t *src, *dest, *mask;
+ uint32_t crc;
+
+ src = make_image ();
+ mask = NULL; // lcg_rand_n (2) ? NULL : make_image();
+ dest = make_image ();
+
+ pixman_image_composite (RANDOM_OP(),
+ src, mask, dest,
+ 0, 0, 0, 0, WIDTH / 2, HEIGHT / 2,
+ WIDTH, HEIGHT);
+
+ crc = compute_crc32_for_image (0, dest);
+
+ pixman_image_unref (src);
+ if (mask)
+ pixman_image_unref (mask);
+ pixman_image_unref (dest);
+
+ return crc;
+}
+
+int
+main (int argc, const char *argv[])
+{
+ return fuzzer_test_main ("rotate", 15000,
+ 0x721947E4,
+ test_transform, argc, argv);
+}
--
1.7.4
_______________________________________________
Pixman mailing list
Pixman@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/pixman
