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| author | marha <marha@users.sourceforge.net> | 2011-01-23 16:30:09 +0000 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2011-01-23 16:30:09 +0000 |
| commit | 8cd59857a99c534c560f58c931f5c2466d4c1f9b (patch) | |
| tree | fd9f3d3f8c557611c1fc509cb947e826b3da1999 /mesalib/src/mesa/state_tracker/st_atom_viewport.c | |
| parent | b8ffa56f8bda74a402eae0c89aadfda7b7db507f (diff) | |
| download | vcxsrv-8cd59857a99c534c560f58c931f5c2466d4c1f9b.tar.gz vcxsrv-8cd59857a99c534c560f58c931f5c2466d4c1f9b.tar.bz2 vcxsrv-8cd59857a99c534c560f58c931f5c2466d4c1f9b.zip | |
mesalib git update 23/1/2011
Diffstat (limited to 'mesalib/src/mesa/state_tracker/st_atom_viewport.c')
| -rw-r--r-- | mesalib/src/mesa/state_tracker/st_atom_viewport.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_atom_viewport.c b/mesalib/src/mesa/state_tracker/st_atom_viewport.c index 0cde4d0ec..df26fb4a6 100644 --- a/mesalib/src/mesa/state_tracker/st_atom_viewport.c +++ b/mesalib/src/mesa/state_tracker/st_atom_viewport.c @@ -47,10 +47,14 @@ update_viewport( struct st_context *st ) /* _NEW_BUFFERS
*/
if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
+ /* Drawing to a window. The corresponding gallium surface uses
+ * Y=0=TOP but OpenGL is Y=0=BOTTOM. So we need to invert the viewport.
+ */
yScale = -1;
yBias = (GLfloat)ctx->DrawBuffer->Height;
}
else {
+ /* Drawing to an FBO where Y=0=BOTTOM, like OpenGL - don't invert */
yScale = 1.0;
yBias = 0.0;
}
|