From: Søren Sandmann Pedersen <s...@redhat.com>
Use a temporary variable s containing the absolute value of the stride
as the upper bound in the inner loops.
---
test/utils.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/test/utils.c b/test/utils.c
index a83fc06..4f66fca 100644
--- a/test/utils.c
+++ b/test/utils.c
@@ -297,11 +297,12 @@ image_endian_swap (pixman_image_t *img)
for (i = 0; i < height; i++)
{
uint8_t *line_data = (uint8_t *)data + stride * i;
-
+ int s = (stride >= 0)? stride : - stride;
+
switch (bpp)
{
case 1:
- for (j = 0; j < stride; j++)
+ for (j = 0; j < s; j++)
{
line_data[j] =
((line_data[j] & 0x80) >> 7) |
@@ -315,7 +316,7 @@ image_endian_swap (pixman_image_t *img)
}
break;
case 4:
- for (j = 0; j < stride; j++)
+ for (j = 0; j < s; j++)
{
line_data[j] = (line_data[j] >> 4) | (line_data[j] << 4);
}
@@ -331,7 +332,7 @@ image_endian_swap (pixman_image_t *img)
}
break;
case 24:
- for (j = 0; j + 3 <= stride; j += 3)
+ for (j = 0; j + 3 <= s; j += 3)
{
char t1 = line_data[j + 0];
char t2 = line_data[j + 1];
@@ -343,7 +344,7 @@ image_endian_swap (pixman_image_t *img)
}
break;
case 32:
- for (j = 0; j + 4 <= stride; j += 4)
+ for (j = 0; j + 4 <= s; j += 4)
{
char t1 = line_data[j + 0];
char t2 = line_data[j + 1];
--
1.7.11.7
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