vc4: Add support for two-sided color.

It's fairly easy, thanks to Rob Clark's lowering code.  Fixes
two-sided-lighting and 4 vertex-program-two-side testcases, while
regressing 8 testcases that involve enabling two-sided color while only
initializing one of the two colors in the VS.  If you're enabling two
sided color, it's of course expected that you really do set up both
colors, so this is still an improvement (and when we set up a linker for
TGSI, we'll hopefully fix those 8 fails).

1 files changed, 6 insertions, 1 deletions

diff --git a/src/gallium/drivers/vc4/vc4_context.h b/src/gallium/drivers/vc4/vc4_context.h
index 3c43b9441a0..e8f9e355a98 100644
--- a/src/gallium/drivers/vc4/vc4_context.h
+++ b/src/gallium/drivers/vc4/vc4_context.h
@@ -76,6 +76,11 @@ struct vc4_shader_uniform_info {
         uint32_t num_texture_samples;
 };
 
+struct vc4_uncompiled_shader {
+        struct pipe_shader_state base;
+        const struct tgsi_token *twoside_tokens;
+};
+
 struct vc4_compiled_shader {
         struct vc4_bo *bo;
 
@@ -90,7 +95,7 @@ struct vc4_compiled_shader {
 };
 
 struct vc4_program_stateobj {
-        struct pipe_shader_state *bind_vs, *bind_fs;
+        struct vc4_uncompiled_shader *bind_vs, *bind_fs;
         struct vc4_compiled_shader *vs, *fs;
         uint32_t dirty;
         uint8_t num_exports;