u_blitter: interpolate clear color using a GENERIC varying instead of COLOR

There are also some u_simple_shaders changes.

On r300, the TGSI_SEMANTIC_COLOR varying is a fixed-point number clamped
to the range [0,1] and limited to 12 bits of precision. Therefore we can't
use it for passing through a clear color in order to clear high precision
texture formats.

This also makes u_blitter use only one vertex shader instead of two.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/gallium/auxiliary/util/u_simple_shaders.h b/src/gallium/auxiliary/util/u_simple_shaders.h
index 4aa34bc4757..1bfec183e34 100644
--- a/src/gallium/auxiliary/util/u_simple_shaders.h
+++ b/src/gallium/auxiliary/util/u_simple_shaders.h
@@ -71,7 +71,9 @@ util_make_fragment_passthrough_shader(struct pipe_context *pipe);
 
 
 extern void *
-util_make_fragment_clonecolor_shader(struct pipe_context *pipe, int num_cbufs);
+util_make_fragment_cloneinput_shader(struct pipe_context *pipe, int num_cbufs,
+                                     int input_semantic,
+                                     int input_interpolate);
 
 #ifdef __cplusplus
 }