1 files changed, 71 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_clip.c b/src/mesa/state_tracker/st_atom_clip.c
new file mode 100644
index 00000000000..23d709b814c
--- /dev/null
+++ b/src/mesa/state_tracker/st_atom_clip.c
@@ -0,0 +1,71 @@
+/**************************************************************************
+ * 
+ * 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 <[email protected]>
+  */
+ 
+
+#include "st_context.h"
+#include "pipe/p_context.h"
+#include "st_atom.h"
+
+
+/* Second state atom for user clip planes:
+ */
+static void update_clip( struct st_context *st )
+{
+   struct pipe_clip_state clip;
+   GLuint i;
+
+   memset(&clip, 0, sizeof(clip));
+
+   for (i = 0; i < PIPE_MAX_CLIP_PLANES; i++) {
+      if (st->ctx->Transform.ClipPlanesEnabled & (1 << i)) {
+	 memcpy(clip.ucp[clip.nr], 
+		st->ctx->Transform._ClipUserPlane[i], 
+		sizeof(clip.ucp[0]));
+	 clip.nr++;
+      }
+   }
+      
+   if (memcmp(&clip, &st->state.clip, sizeof(clip)) != 0) {
+      st->state.clip = clip;
+      st->pipe->set_clip_state(st->pipe, &clip);
+   }
+}
+
+
+const struct st_tracked_state st_update_clip = {
+   "st_update_clip",					/* name */
+   {							/* dirty */
+      (_NEW_TRANSFORM),					/* mesa */
+      0,						/* st */
+   },
+   update_clip						/* update */
+};