diff options
| author | Brian <brian.paul@tungstengraphics.com> | 2007-08-10 16:24:55 -0600 |
|---|---|---|
| committer | Brian <brian.paul@tungstengraphics.com> | 2007-08-10 16:24:55 -0600 |
| commit | 717831ea712c07e18f2c2e797c49754bf2500e5e (patch) | |
| tree | cf4edd8655cce8b24ccb11f35cbe0f4c13c1c1db /src/mesa/state_tracker/st_atom_scissor.c | |
| parent | fb4ff8a2a8c0adbe1925d42eaaedfa52707c7ffb (diff) | |
invert Y for scissor
Diffstat (limited to 'src/mesa/state_tracker/st_atom_scissor.c')
| -rw-r--r-- | src/mesa/state_tracker/st_atom_scissor.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_scissor.c b/src/mesa/state_tracker/st_atom_scissor.c index 05a9f3eed1..2bf633828e 100644 --- a/src/mesa/state_tracker/st_atom_scissor.c +++ b/src/mesa/state_tracker/st_atom_scissor.c @@ -44,6 +44,7 @@ update_scissor( struct st_context *st ) { struct pipe_scissor_state scissor; const struct gl_framebuffer *fb = st->ctx->DrawBuffer; + GLint miny, maxy; scissor.minx = 0; scissor.miny = 0; @@ -66,6 +67,13 @@ 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 + */ + 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 */ st->state.scissor = scissor; /* struct copy */ |