gallium: use simple color pass-through fragment shader if textures don't exist

If we run out of texture memory we may not have the texture needed by the
fragment shader.  If this happens, plug in a color passthrough shader.
So instead of crashing, we just don't see the texture.
GL_OUT_OF_MEMORY is raised, of course.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h
index 2851770d4ca..7e933a2b109 100644
--- a/src/mesa/state_tracker/st_context.h
+++ b/src/mesa/state_tracker/st_context.h
@@ -165,6 +165,8 @@ struct st_context
       struct pipe_buffer *vbuf;
    } clear;
 
+   void *passthrough_fs;  /**< simple pass-through frag shader */
+
    struct gen_mipmap_state *gen_mipmap;
    struct blit_state *blit;