diff options
| -rw-r--r-- | src/gallium/auxiliary/util/p_util.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/gallium/auxiliary/util/p_util.c b/src/gallium/auxiliary/util/p_util.c index 0e3f082b3ee..4e60b1b8418 100644 --- a/src/gallium/auxiliary/util/p_util.c +++ b/src/gallium/auxiliary/util/p_util.c @@ -37,6 +37,7 @@ /** * Copy 2D rect from one place to another. * Position and sizes are in pixels. + * src_pitch may be negative to do vertical flip of pixels from source. */ void pipe_copy_rect(ubyte * dst, @@ -52,6 +53,7 @@ pipe_copy_rect(ubyte * dst, int src_y) { unsigned i; + int src_pitch_pos = src_pitch < 0 ? -src_pitch : src_pitch; assert(cpp > 0); assert(src_x >= 0); @@ -61,10 +63,11 @@ pipe_copy_rect(ubyte * dst, dst_pitch *= cpp; src_pitch *= cpp; + src_pitch_pos *= cpp; dst += dst_x * cpp; src += src_x * cpp; dst += dst_y * dst_pitch; - src += src_y * src_pitch; + src += src_y * src_pitch_pos; width *= cpp; if (width == dst_pitch && width == src_pitch) |