1 files changed, 72 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_cbuf.c b/src/mesa/state_tracker/st_atom_cbuf.c
new file mode 100644
index 0000000000..cd707ec5ef
--- /dev/null
+++ b/src/mesa/state_tracker/st_atom_cbuf.c
@@ -0,0 +1,72 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+ /*
+  * Authors:
+  *   Keith Whitwell <keith@tungstengraphics.com>
+  */
+ 
+#include "st_context.h"
+#include "softpipe/sp_context.h"
+#include "st_atom.h"
+
+extern GLboolean xmesa_get_cbuf_details( GLcontext *ctx,
+					 void **ptr,
+					 GLuint *cpp,
+					 GLint *stride,
+					 GLuint *format );
+
+
+/* This is a hack to work with the X11 driver as a test harness
+ */
+static void update_cbuf_state( struct st_context *st )
+{
+   struct softpipe_surface cbuf;
+   GLboolean ok;
+
+   ok = xmesa_get_cbuf_details( st->ctx,
+				(void **)&cbuf.ptr,
+				&cbuf.cpp,
+				&cbuf.stride,
+				&cbuf.format );
+
+   assert(ok);
+
+   if (memcmp(&cbuf, &st->state.cbuf, sizeof(cbuf)) != 0) {
+      st->state.cbuf = cbuf;
+      st->softpipe->set_cbuf_state( st->softpipe, &cbuf );
+   }
+}
+
+const struct st_tracked_state st_update_cbuf = {
+   .dirty = {
+      .mesa = _NEW_BUFFERS,
+      .st  = 0,
+   },
+   .update = update_cbuf_state
+};
+