From aa782f260d09bbc10db039340358b3518e8a5a38 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Wed, 1 May 2013 19:15:32 -0600 Subject: [PATCH] mesa: fix save_ShadeModel() logic and add new comments This removes the test for _mesa_inside_dlist_begin_end(). If ctx->Driver.CurrentSavePrimitive==PRIM_UNKNOWN (the initial value), _mesa_inside_dlist_begin_end() will, confusingly, return TRUE. So we didn't set the ctx->ListState.Current.ShadeModel value and it remained in its indeterminate state. This didn't effect correctness, but it defeated the intended optimization of dropping redundant glShadeModel() state changes in order to coalesce sequences of drawing commands. Verified with new piglit gl-1.0-dlist-shademodel test. Reviewed-by: Jose Fonseca --- src/mesa/main/dlist.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/src/mesa/main/dlist.c b/src/mesa/main/dlist.c index bc0c92a..3071a37 100644 --- a/src/mesa/main/dlist.c +++ b/src/mesa/main/dlist.c @@ -3771,15 +3771,16 @@ save_ShadeModel(GLenum mode) CALL_ShadeModel(ctx->Exec, (mode)); } + /* Don't compile this call if it's a no-op. + * By avoiding this state change we have a better chance of + * coalescing subsequent drawing commands into one batch. + */ if (ctx->ListState.Current.ShadeModel == mode) return; SAVE_FLUSH_VERTICES(ctx); - /* Only save the value if we know the statechange will take effect: - */ - if (!_mesa_inside_dlist_begin_end(ctx)) - ctx->ListState.Current.ShadeModel = mode; + ctx->ListState.Current.ShadeModel = mode; n = alloc_instruction(ctx, OPCODE_SHADE_MODEL, 1); if (n) { -- 2.7.4