diff options
| author | Anuj Phogat <[email protected]> | 2015-12-11 14:41:30 -0800 |
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| committer | Anuj Phogat <[email protected]> | 2016-06-10 14:35:21 -0700 |
| commit | f8679badd423b61b3a49e1138445f9f3d740fdde (patch) | |
| tree | 6c61eea03697697bb3bc5c1b7c709167ca433a45 /src/mesa | |
| parent | 1584918996f0deb5de0c4759b23d00ce52db37a4 (diff) | |
mesa: Fix region overlap conditions for rectangles with a shared edge
>From OpenGL 4.0 spec, section 4.3.2 "Copying Pixels":
"The pixels corresponding to these buffers are copied from the source
rectangle bounded by the locations (srcX0, srcY 0) and (srcX1, srcY 1)
to the destination rectangle bounded by the locations (dstX0, dstY 0)
and (dstX1, dstY 1). The lower bounds of the rectangle are inclusive,
while the upper bounds are exclusive."
So, the rectangles sharing just an edge shouldn't overlap.
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Cc: "12.0" <[email protected]>
Signed-off-by: Anuj Phogat <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>
Reviewed-by: Nicolai Hähnle <[email protected]>
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/main/blit.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/mesa/main/blit.c b/src/mesa/main/blit.c index 5729e601c12..e739130f984 100644 --- a/src/mesa/main/blit.c +++ b/src/mesa/main/blit.c @@ -68,16 +68,16 @@ _mesa_regions_overlap(int srcX0, int srcY0, int dstX0, int dstY0, int dstX1, int dstY1) { - if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1)) + if (MAX2(srcX0, srcX1) <= MIN2(dstX0, dstX1)) return false; /* dst completely right of src */ - if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1)) + if (MAX2(dstX0, dstX1) <= MIN2(srcX0, srcX1)) return false; /* dst completely left of src */ - if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1)) + if (MAX2(srcY0, srcY1) <= MIN2(dstY0, dstY1)) return false; /* dst completely above src */ - if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1)) + if (MAX2(dstY0, dstY1) <= MIN2(srcY0, srcY1)) return false; /* dst completely below src */ return true; /* some overlap */ |