framebuffer state

src/mesa/state_tracker/st_atom_framebuffer.c

@@ -0,0 +1,78 @@
+/**************************************************************************
+ * 
+ * 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>
+  *   Brian Paul
+  */
+ 
+#include "st_context.h"
+#include "st_atom.h"
+#include "pipe/p_context.h"
+
+
+static struct pipe_surface *
+xmesa_get_color_surface(GLcontext *ctx, GLuint i)
+{
+   return NULL;
+}
+
+
+/**
+ * Update framebuffer state (color, depth, stencil, etc. buffers)
+ * XXX someday: separate draw/read buffers.
+ */
+static void
+update_framebuffer_state( struct st_context *st )
+{
+   struct pipe_framebuffer_state framebuffer;
+   GLuint i;
+
+   /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
+    * to determine which surfaces to draw to
+    */
+   framebuffer.num_cbufs = st->ctx->DrawBuffer->_NumColorDrawBuffers[0];
+   for (i = 0; i < framebuffer.num_cbufs; i++) {
+      framebuffer.cbufs[i] = xmesa_get_color_surface(st->ctx, i);
+   }
+
+   if (memcmp(&framebuffer, &st->state.framebuffer, sizeof(framebuffer)) != 0) {
+      st->state.framebuffer = framebuffer;
+      st->pipe->set_framebuffer_state( st->pipe, &framebuffer );
+   }
+}
+
+
+const struct st_tracked_state st_update_framebuffer = {
+   .dirty = {
+      .mesa = _NEW_BUFFERS,
+      .st  = 0,
+   },
+   .update = update_framebuffer_state
+};
+