+#define SHADERPERMUTATION_COUNTMASK (SHADERPERMUTATION_COUNT - 1) // mask of valid indexing bits for r_glsl_permutations[] array
+
+// these are additional flags used only by R_GLSL_CompilePermutation
+#define SHADERPERMUTATION_USES_VERTEXSHADER (1<<29)
+#define SHADERPERMUTATION_USES_GEOMETRYSHADER (1<<30)
+#define SHADERPERMUTATION_USES_FRAGMENTSHADER (1<<31)