vbo: bind arrays only when necessary

We don't need to call bind_arrays in the vbo module if the states
which the function depends on are not dirty.

src/mesa/main/mtypes.h

@@ -1643,6 +1643,7 @@ struct gl_array_attrib
    GLuint RestartIndex;
 
    GLbitfield NewState;		/**< mask of _NEW_ARRAY_* values */
+   GLboolean RebindArrays; /**< whether the VBO module should rebind arrays */
 
    /* GL_ARB_vertex_buffer_object */
    struct gl_buffer_object *ArrayBufferObj;

src/mesa/main/state.c

@@ -662,6 +662,8 @@ _mesa_update_state_locked( struct gl_context *ctx )
    ctx->NewState = 0;
    ctx->Driver.UpdateState(ctx, new_state);
    ctx->Array.NewState = 0;
+   if (!ctx->Array.RebindArrays)
+      ctx->Array.RebindArrays = (new_state & (_NEW_ARRAY | _NEW_PROGRAM)) != 0;
 }
 
 

src/mesa/vbo/vbo_exec_array.c

@@ -502,8 +502,13 @@ recalculate_input_bindings(struct gl_context *ctx)
 static void
 bind_arrays(struct gl_context *ctx)
 {
+   if (!ctx->Array.RebindArrays) {
+      return;
+   }
+
    bind_array_obj(ctx);
    recalculate_input_bindings(ctx);
+   ctx->Array.RebindArrays = GL_FALSE;
 }