st/mesa: need to translate clear color according to surface's base format

When clearing a GL_LUMINANCE_ALPHA buffer, for example, we need to convert
the clear color (R,G,B,A) to (R,R,R,A).  We were doing this for texture border
colors but not renderbuffers.  Move the translation function to st_format.c
and share it.

This fixes the piglit fbo-clear-formats test.

NOTE: This is a candidate for the 7.9 and 7.10 branches.

1 files changed, 2 insertions, 44 deletions

diff --git a/src/mesa/state_tracker/st_atom_sampler.c b/src/mesa/state_tracker/st_atom_sampler.c
index b67068df373..474cbd5897d 100644
--- a/src/mesa/state_tracker/st_atom_sampler.c
+++ b/src/mesa/state_tracker/st_atom_sampler.c
@@ -36,6 +36,7 @@
 
 #include "st_context.h"
 #include "st_cb_texture.h"
+#include "st_format.h"
 #include "st_atom.h"
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
@@ -117,49 +118,6 @@ gl_filter_to_img_filter(GLenum filter)
 }
 
 
-static void
-xlate_border_color(const GLfloat *colorIn, GLenum baseFormat, GLfloat *colorOut)
-{
-   switch (baseFormat) {
-   case GL_RED:
-      colorOut[0] = colorIn[0];
-      colorOut[1] = 0.0F;
-      colorOut[2] = 0.0F;
-      colorOut[3] = 1.0F;
-      break;
-   case GL_RG:
-      colorOut[0] = colorIn[0];
-      colorOut[1] = colorIn[1];
-      colorOut[2] = 0.0F;
-      colorOut[3] = 1.0F;
-      break;
-   case GL_RGB:
-      colorOut[0] = colorIn[0];
-      colorOut[1] = colorIn[1];
-      colorOut[2] = colorIn[2];
-      colorOut[3] = 1.0F;
-      break;
-   case GL_ALPHA:
-      colorOut[0] = colorOut[1] = colorOut[2] = 0.0;
-      colorOut[3] = colorIn[3];
-      break;
-   case GL_LUMINANCE:
-      colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
-      colorOut[3] = 1.0;
-      break;
-   case GL_LUMINANCE_ALPHA:
-      colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
-      colorOut[3] = colorIn[3];
-      break;
-   case GL_INTENSITY:
-      colorOut[0] = colorOut[1] = colorOut[2] = colorOut[3] = colorIn[0];
-      break;
-   default:
-      COPY_4V(colorOut, colorIn);
-   }
-}
-
-
 static void 
 update_samplers(struct st_context *st)
 {
@@ -223,7 +181,7 @@ update_samplers(struct st_context *st)
             assert(sampler->min_lod <= sampler->max_lod);
          }
 
-         xlate_border_color(texobj->BorderColor.f,
+         st_translate_color(texobj->BorderColor.f,
                             teximg ? teximg->_BaseFormat : GL_RGBA,
                             sampler->border_color);