[Mesa-dev] [PATCH] st/mesa: Validate state before doing blits.

[Henri Verbeet]

Specifically, this ensures things like the front buffer actually exist. This
fixes piglt fbo/fbo-sys-blit and fd.o bug 35483. One concern is that
st_validate_state() looks expensive, are there any cheaper options?
---
 src/mesa/state_tracker/st_cb_blit.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/mesa/state_tracker/st_cb_blit.c b/src/mesa/state_tracker/st_cb_blit.c
index 6d02a7d..25c95c7 100644
--- a/src/mesa/state_tracker/st_cb_blit.c
+++ b/src/mesa/state_tracker/st_cb_blit.c
@@ -39,6 +39,7 @@
 #include "st_texture.h"
 #include "st_cb_blit.h"
 #include "st_cb_fbo.h"
+#include "st_atom.h"
 
 #include "util/u_blit.h"
 
@@ -75,6 +76,8 @@ st_BlitFramebuffer(struct gl_context *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 */
-- 
1.7.2.5