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-rw-r--r--src/mesa/swrast/s_fragprog.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mesa/swrast/s_fragprog.c b/src/mesa/swrast/s_fragprog.c
index bf7a1de03b..525cf9d724 100644
--- 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;