i965/gen7: Enable fragment shader dispatch if the program has image uniforms.

Shaders with image uniforms may have side effects.  Make sure that
fragment shader threads are dispatched if the shader has any image
uniforms.

v2: Use brw_stage_prog_data::nr_image_params to find out if the shader
    has image uniforms instead of checking core mesa data structures
    (Ken).

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/drivers/dri/i965/gen7_wm_state.c b/src/mesa/drivers/dri/i965/gen7_wm_state.c
index d7be58dd0f7169b058d4e11c68013c0e10bc607d..aa47421844e533b200590902327e6c04f714e4b2 100644 (file)
--- a/src/mesa/drivers/dri/i965/gen7_wm_state.c
+++ b/src/mesa/drivers/dri/i965/gen7_wm_state.c
@@ -83,6 +83,7 @@ upload_wm_state(struct brw_context *brw)
 
    /* _NEW_BUFFERS | _NEW_COLOR */
    if (brw_color_buffer_write_enabled(brw) || writes_depth ||
+       prog_data->base.nr_image_params ||
        dw1 & GEN7_WM_KILL_ENABLE) {
       dw1 |= GEN7_WM_DISPATCH_ENABLE;
    }