diff options
author | Brian Paul <[email protected]> | 2009-05-01 12:25:42 -0600 |
---|---|---|
committer | Brian Paul <[email protected]> | 2009-05-01 12:25:42 -0600 |
commit | b85b315ebbe25efbd118887bdc87a562d4334fcc (patch) | |
tree | 1db456c924ce8f0247f56c27c409d5dc9a122127 /src/mesa/state_tracker/st_cb_flush.c | |
parent | 30b3d800917cc5b41ec508fd38a0ae1da8624a36 (diff) |
st: added st_renderbuffer::defined flag
Indicates whether there's defined image contents, or garbage/don't care.
This is set when we draw into a renderbuffer and cleared when we resize/
reallocate a renderbuffer or do a buffer swap (back buffer becomes undefined).
We use this to determine whether the front color buffer has been drawn to,
and whether to display its contents upon glFlush/Finish(), when the new
st_swapbuffers() function is used.
Diffstat (limited to 'src/mesa/state_tracker/st_cb_flush.c')
-rw-r--r-- | src/mesa/state_tracker/st_cb_flush.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/mesa/state_tracker/st_cb_flush.c b/src/mesa/state_tracker/st_cb_flush.c index fbaffd154f9..8ceeeabcd37 100644 --- a/src/mesa/state_tracker/st_cb_flush.c +++ b/src/mesa/state_tracker/st_cb_flush.c @@ -47,10 +47,19 @@ #include "util/u_blit.h" +/** Check if we have a front color buffer and if it's been drawn to. */ static INLINE GLboolean is_front_buffer_dirty(struct st_context *st) { - return st->frontbuffer_status == FRONT_STATUS_DIRTY; + if (st->frontbuffer_status == FRONT_STATUS_DIRTY) { + return GL_TRUE; + } + else { + GLframebuffer *fb = st->ctx->DrawBuffer; + struct st_renderbuffer *strb + = st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer); + return strb && strb->defined; + } } |