From fdb66d1076a1256ebd2bb8cfd491610ee30e8b23 Mon Sep 17 00:00:00 2001
From: Robert Bragg <robert@linux.intel.com>
Date: Sat, 4 Apr 2009 19:21:22 +0100
Subject: [PATCH] [cogl] cogl_material_set_layer does nothing if resetting the
 same texture

This avoids dirtying the layer, and should avoid some uneeded state changes
---
 common/cogl-material.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/cogl-material.c b/common/cogl-material.c
index 66a4b0c96..a7013314c 100644
--- a/common/cogl-material.c
+++ b/common/cogl-material.c
@@ -679,6 +679,9 @@ cogl_material_set_layer (CoglHandle material_handle,
   material = _cogl_material_pointer_from_handle (material_handle);
   layer = _cogl_material_get_layer (material_handle, layer_index, TRUE);
 
+  if (texture_handle == layer->texture)
+    return;
+
   n_layers = g_list_length (material->layers);
   if (n_layers >= CGL_MAX_COMBINED_TEXTURE_IMAGE_UNITS)
     {