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st/mesa: invert scissor rect depending on FB orientation

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Fixes fd.o bug 27715
This commit is contained in:
Brian Paul 2010-04-19 10:10:41 -06:00
parent cf7d08b443
commit c060265bdb
1 changed files with 8 additions and 5 deletions
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13
src/mesa/state_tracker/st_atom_scissor.c
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@ -72,12 +72,15 @@ update_scissor( struct st_context *st )
scissor.minx = scissor.miny = scissor.maxx = scissor.maxy = 0;
}
/* Now invert Y. Pipe drivers use the convention Y=0=top for surfaces
/* Now invert Y if needed.
* Gallium drivers use the convention Y=0=top for surfaces.
*/
miny = fb->Height - scissor.maxy;
maxy = fb->Height - scissor.miny;
scissor.miny = miny;
scissor.maxy = maxy;
if (st_fb_orientation(fb) == Y_0_TOP) {
miny = fb->Height - scissor.maxy;
maxy = fb->Height - scissor.miny;
scissor.miny = miny;
scissor.maxy = maxy;
}
if (memcmp(&scissor, &st->state.scissor, sizeof(scissor)) != 0) {
/* state has changed */