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st/mesa: Validate state before doing blits.

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Specifically, this ensures things like the front buffer actually exist. This
fixes piglt fbo/fbo-sys-blit and fd.o bug 35483.

Signed-off-by: Henri Verbeet <hverbeet@gmail.com>
(cherry picked from commit 5d7c27f5ec)
This commit is contained in:
Henri Verbeet 2011-03-23 21:58:06 +01:00 • committed by Marek Olšák
parent 7397c034ac
commit 6b46754bc0
1 changed files with 3 additions and 0 deletions
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3
src/mesa/state_tracker/st_cb_blit.c
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@ -38,6 +38,7 @@
#include "st_texture.h"
#include "st_cb_blit.h"
#include "st_cb_fbo.h"
#include "st_atom.h"
#include "util/u_blit.h"
#include "util/u_inlines.h"
@ -75,6 +76,8 @@ st_BlitFramebuffer(GLcontext *ctx,
struct gl_framebuffer *readFB = ctx->ReadBuffer;
struct gl_framebuffer *drawFB = ctx->DrawBuffer;
st_validate_state(st);
if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
&dstX0, &dstY0, &dstX1, &dstY1)) {
return; /* nothing to draw/blit */