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-rw-r--r--src/mesa/main/state.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/mesa/main/state.c b/src/mesa/main/state.c
index 59a4e161bff..4389415b048 100644
--- a/src/mesa/main/state.c
+++ b/src/mesa/main/state.c
@@ -192,7 +192,10 @@ update_arrays( struct gl_context *ctx )
static void
update_program_enables(struct gl_context *ctx)
{
- /* These _Enabled flags indicate if the program is enabled AND valid. */
+ /* These _Enabled flags indicate if the user-defined ARB/NV vertex/fragment
+ * program is enabled AND valid. Similarly for ATI fragment shaders.
+ * GLSL shaders not relevant here.
+ */
ctx->VertexProgram._Enabled = ctx->VertexProgram.Enabled
&& ctx->VertexProgram.Current->Base.Instructions;
ctx->FragmentProgram._Enabled = ctx->FragmentProgram.Enabled