From c26fcee175fe0edc4abcf580cb82cb03310a3e5b Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Sun, 27 Apr 2008 05:16:36 -0400
Subject: [PATCH] Disable any enabled client-side arrays when binding a new
 shader.

--HG--
branch : trunk
---
 mojoshader_opengl.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/mojoshader_opengl.c b/mojoshader_opengl.c
index ce3df0af..0241ad0c 100644
--- a/mojoshader_opengl.c
+++ b/mojoshader_opengl.c
@@ -347,14 +347,27 @@ MOJOSHADER_glProgram *MOJOSHADER_glLinkProgram(MOJOSHADER_glShader *vshader,
 void MOJOSHADER_glBindProgram(MOJOSHADER_glProgram *program)
 {
     GLhandleARB handle = 0;
+
+    if (program == bound_program)
+        return;  // nothing to do.
+
+    // Disable any client-side arrays the current program could have used.
+    if (bound_program != NULL)
+    {
+        pglDisableClientState(GL_VERTEX_ARRAY);
+        for (i = 0; i < bound_program->attribute_count; i++)
+        {
+            const AttributeMap *map = &bound_program->attributes[i];
+            pglDisableVertexAttribArrayARB(map->location);
+        } // if
+    } // for
+
     if (program != NULL)
     {
         handle = program->handle;
         program->refcount++;
     } // if
 
-    // !!! FIXME: unbind client-side arrays.
-
     pglUseProgramObjectARB(handle);
     program_unref(bound_program);
     bound_program = program;