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img_convert: sanitizer: avoid invalid left-shifts

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(a << 24) is not in the valid int range when a is 255, so use an
unsigned instead.

Signed-off-by: wm4 <wm4@nowhere>
This commit is contained in:
Ben Boeckel 2014-09-14 14:36:49 -04:00 committed by wm4
parent 3f6212cd8d
commit 9bfa38add6
1 changed files with 4 additions and 4 deletions
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8
sub/img_convert.c
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@ -46,10 +46,10 @@ static void rgba_to_premultiplied_rgba(uint32_t *colors, size_t count)
{
for (int n = 0; n < count; n++) {
uint32_t c = colors[n];
int b = c & 0xFF;
int g = (c >> 8) & 0xFF;
int r = (c >> 16) & 0xFF;
int a = (c >> 24) & 0xFF;
unsigned b = c & 0xFF;
unsigned g = (c >> 8) & 0xFF;
unsigned r = (c >> 16) & 0xFF;
unsigned a = (c >> 24) & 0xFF;
b = b * a / 255;
g = g * a / 255;
r = r * a / 255;