Improve the code for interpolating fragment attributes a little. More to come...

1 files changed, 19 insertions, 6 deletions

diff --git a/src/mesa/swrast/s_context.h b/src/mesa/swrast/s_context.h
index dfe311a40b..c8333b8e0a 100644
--- a/src/mesa/swrast/s_context.h
+++ b/src/mesa/swrast/s_context.h
@@ -138,12 +138,10 @@ typedef struct
    GLbitfield _ColorOutputsMask;
    GLuint _NumColorOutputs;
 
-   /** Fragment attributes to compute during rasterization.
-    * Mask of FRAG_BIT_* flags.
-    */
-   GLbitfield _FragmentAttribs;
-   GLuint _MinFragmentAttrib;  /**< Lowest bit set in _FragmentAttribs */
-   GLuint _MaxFragmentAttrib;  /**< Highest bit set in _FragmentAttribs + 1 */
+   /** List/array of the fragment attributes to interpolate */
+   GLuint _ActiveAttribs[FRAG_ATTRIB_MAX];
+   /** Number of fragment attributes to interpolate */
+   GLuint _NumActiveAttribs;
 
    /* Accum buffer temporaries.
     */
@@ -277,4 +275,19 @@ _swrast_update_texture_samplers(GLcontext *ctx);
 #define FixedToChan(X)  FixedToInt(X)
 #endif
 
+
+/**
+ * For looping over fragment attributes in the pointe, line
+ * triangle rasterizers.
+ */
+#define ATTRIB_LOOP_BEGIN                                \
+   {                                                     \
+      GLuint a;                                          \
+      for (a = 0; a < swrast->_NumActiveAttribs; a++) {  \
+         const GLuint attr = swrast->_ActiveAttribs[a];
+
+#define ATTRIB_LOOP_END } }
+
+
+
 #endif