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gallium: fix Y-inverted copies

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Don't require the caller to pass a non-intuitive negative src_y coord anymore
when doing a src-inverted copy.
This commit is contained in:
Brian Paul 2008-06-23 09:47:12 -06:00
parent 81b1a4224d
commit f738c3acac
1 changed files with 4 additions and 1 deletions
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5
src/gallium/auxiliary/util/p_util.c
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@ -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)