mesa: added comment about gl_PointCoord

2008-08-11 15:05:57 -06:00
parent ac0d19601c
commit 3a428aca93
1 changed files with 1 additions and 0 deletions
--- a/src/mesa/swrast/s_fragprog.c
+++ b/src/mesa/swrast/s_fragprog.c
@@ -129,6 +129,7 @@ init_machine(GLcontext *ctx, struct gl_program_machine *machine,
   if (ctx->Shader.CurrentProgram) {
      /* Store front/back facing value in register FOGC.Y */
      machine->Attribs[FRAG_ATTRIB_FOGC][col][1] = 1.0 - span->facing;
+      /* Note FOGC.ZW is gl_PointCoord if drawing a sprite */
   }

   machine->CurElement = col;