[Mesa-dev] [PATCH 1/2] i965/fs: Guess nr_color_regions better in precompile

[Chris Forbes]

Signed-off-by: Chris Forbes <chrisf at ijw.co.nz>
---
 src/mesa/drivers/dri/i965/brw_fs.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 1e6c3e0..d6ebe50 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -3589,7 +3589,9 @@ brw_fs_precompile(struct gl_context *ctx, struct gl_shader_program *prog)
       key.render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
    }
 
-   key.nr_color_regions = 1;
+   key.nr_color_regions = _mesa_bitcount_64(fp->Base.OutputsWritten &
+         ~(BITFIELD64_BIT(FRAG_RESULT_DEPTH) |
+         BITFIELD64_BIT(FRAG_RESULT_SAMPLE_MASK)));
 
    /* GL_FRAGMENT_SHADER_DERIVATIVE_HINT is almost always GL_DONT_CARE.  The
     * quality of the derivatives is likely to be determined by the driconf
-- 
1.8.5.3