From: Søren Sandmann Pedersen <s...@redhat.com>
This test demonstrates a bug where a certain transformation matrix can
result in an infinite loop. It was extracted as a standalone version
of "affine-test 212944861".
If given the option -nf, the test program will not call fail_after()
and therefore potentially run forever.
---
test/Makefile.sources | 1 +
test/infinite-loop.c | 39 +++++++++++++++++++++++++++++++++++++++
2 files changed, 40 insertions(+)
create mode 100644 test/infinite-loop.c
diff --git a/test/Makefile.sources b/test/Makefile.sources
index fad8c6f..1ecface 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -6,6 +6,7 @@ TESTPROGRAMS = \
region-translate-test \
fetch-test \
oob-test \
+ infinite-loop \
trap-crasher \
alpha-loop \
scaling-crash-test \
diff --git a/test/infinite-loop.c b/test/infinite-loop.c
new file mode 100644
index 0000000..8a7a2ab
--- /dev/null
+++ b/test/infinite-loop.c
@@ -0,0 +1,39 @@
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "utils.h"
+
+int
+main (int argc, char **argv)
+{
+#define SRC_WIDTH 16
+#define SRC_HEIGHT 12
+#define DST_WIDTH 7
+#define DST_HEIGHT 2
+
+ static const pixman_transform_t transform = {
+ { { 0x200017bd, 0x00000000, 0x000e6465 },
+ { 0x00000000, 0x000a42fd, 0x000e6465 },
+ { 0x00000000, 0x00000000, 0x00010000 },
+ }
+ };
+ pixman_image_t *src, *dest;
+
+ src = pixman_image_create_bits (
+ PIXMAN_a8r8g8b8, SRC_WIDTH, SRC_HEIGHT, NULL, -1);
+ dest = pixman_image_create_bits (
+ PIXMAN_a8r8g8b8, DST_WIDTH, DST_HEIGHT, NULL, -1);
+
+ pixman_image_set_transform (src, &transform);
+ pixman_image_set_repeat (src, PIXMAN_REPEAT_NORMAL);
+ pixman_image_set_filter (src, PIXMAN_FILTER_BILINEAR, NULL, 0);
+
+ if (argc == 1 || strcmp (argv[1], "-nf") != 0)
+ fail_after (1, "infinite loop detected");
+
+ pixman_image_composite (
+ PIXMAN_OP_OVER, src, NULL, dest, -3, -3, 0, 0, 0, 0, 6, 2);
+
+ return 0;
+}
--
1.7.11.4
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