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| author | marha <marha@users.sourceforge.net> | 2011-12-17 13:43:14 +0100 |
|---|---|---|
| committer | Marc Haesen <marc@hc-consult.be> | 2011-12-17 13:43:14 +0100 |
| commit | abacebe06d9f3d2fe1b7d256bd86cddbfa592a85 (patch) | |
| tree | a05bb04105e9dd1cda779071d9ca274b86840c7e /mesalib/src/mesa/swrast/s_blit.c | |
| parent | 47913e82955ec8e2b1ba4d4b145497dede9163b5 (diff) | |
| download | vcxsrv-abacebe06d9f3d2fe1b7d256bd86cddbfa592a85.tar.gz vcxsrv-abacebe06d9f3d2fe1b7d256bd86cddbfa592a85.tar.bz2 vcxsrv-abacebe06d9f3d2fe1b7d256bd86cddbfa592a85.zip | |
libX11 libxtrans mesa xserver git update 17 dec 2011
Diffstat (limited to 'mesalib/src/mesa/swrast/s_blit.c')
| -rw-r--r-- | mesalib/src/mesa/swrast/s_blit.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/mesalib/src/mesa/swrast/s_blit.c b/mesalib/src/mesa/swrast/s_blit.c index 2817ec12f..803ad2e89 100644 --- a/mesalib/src/mesa/swrast/s_blit.c +++ b/mesalib/src/mesa/swrast/s_blit.c @@ -478,7 +478,15 @@ simple_blit(struct gl_context *ctx, ASSERT(srcX1 - srcX0 == dstX1 - dstX0); ASSERT(srcY1 - srcY0 == dstY1 - dstY0); - /* determine if copy should be bottom-to-top or top-to-bottom */ + /* From the GL_ARB_framebuffer_object spec: + * + * "If the source and destination buffers are identical, and the source + * and destination rectangles overlap, the result of the blit operation + * is undefined." + * + * However, we provide the expected result anyway by flipping the order of + * the memcpy of rows. + */ if (srcY0 > dstY0) { /* src above dst: copy bottom-to-top */ yStep = 1; |