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GPU_select_buffer_stride_realign: fix crash when one of the rect's dimensions is 0.

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mano-wii
2019-05-21 20:56:27 -03:00
parent 73f7ed7ffa
commit fa542237dd
1 changed files with 9 additions and 3 deletions
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12
source/blender/gpu/intern/gpu_select.c
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@@ -229,12 +229,18 @@ void GPU_select_buffer_stride_realign(const rcti *src, const rcti *dst, uint *r_
const int dst_x = BLI_rcti_size_x(dst);
const int dst_y = BLI_rcti_size_y(dst);
int last_px_written = dst_x * dst_y - 1;
int last_px_id = src_x * (y + dst_y - 1) + (x + dst_x - 1);
const int skip = src_x - dst_x;
memset(&r_buf[last_px_id + 1], 0, (src_x * src_y - (last_px_id + 1)) * sizeof(*r_buf));
if (last_px_id < 0) {
/* Nothing to write. */
BLI_assert(last_px_id == -1);
return;
}
int last_px_written = dst_x * dst_y - 1;
const int skip = src_x - dst_x;
while (true) {
for (int i = dst_x; i--;) {
r_buf[last_px_id--] = r_buf[last_px_written--];