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, 7 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/i915tex/i915_vtbl.c b/src/mesa/drivers/dri/i915tex/i915_vtbl.c
index 51aff68840..13ca9aee6b 100644
--- a/src/mesa/drivers/dri/i915tex/i915_vtbl.c
+++ b/src/mesa/drivers/dri/i915tex/i915_vtbl.c
@@ -44,13 +44,18 @@
 #include "i915_context.h"
 
 static void
-i915_render_start(struct intel_context *intel)
+i915_render_prevalidate(struct intel_context *intel)
 {
    struct i915_context *i915 = i915_context(&intel->ctx);
 
    i915ValidateFragmentProgram(i915);
 }
 
+static void
+i915_render_start(struct intel_context *intel)
+{
+}
+
 
 static void
 i915_reduced_primitive_state(struct intel_context *intel, GLenum rprim)
@@ -547,6 +552,7 @@ i915InitVtbl(struct i915_context *i915)
    i915->intel.vtbl.lost_hardware = i915_lost_hardware;
    i915->intel.vtbl.reduced_primitive_state = i915_reduced_primitive_state;
    i915->intel.vtbl.render_start = i915_render_start;
+   i915->intel.vtbl.render_prevalidate = i915_render_prevalidate;
    i915->intel.vtbl.set_draw_region = i915_set_draw_region;
    i915->intel.vtbl.update_texture_state = i915UpdateTextureState;
    i915->intel.vtbl.flush_cmd = i915_flush_cmd;