Fix crashes when the frag prog can't be handled in hardware (#11131)

Must not change to/from swrast after Render.Start or bad things will happen.
(Driver will still somewhat incorrectly report an implementation error,
and apps can't really figure out if a prog is natively supported as validation
is later - could try doing it earlier to give some hint at least, even though
native status may still change later due to fog etc.)

1 files changed, 1 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i915tex/intel_context.h b/src/mesa/drivers/dri/i915tex/intel_context.h
index 535a93effac..ee5be455333 100644
--- a/src/mesa/drivers/dri/i915tex/intel_context.h
+++ b/src/mesa/drivers/dri/i915tex/intel_context.h
@@ -131,6 +131,7 @@ struct intel_context
       void (*update_texture_state) (struct intel_context * intel);
 
       void (*render_start) (struct intel_context * intel);
+      void (*render_prevalidate) (struct intel_context * intel);
       void (*set_draw_region) (struct intel_context * intel,
                                struct intel_region * draw_region,
                                struct intel_region * depth_region);