1 files changed, 118 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pt.h b/src/gallium/auxiliary/draw/draw_pt.h
new file mode 100644
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+++ b/src/gallium/auxiliary/draw/draw_pt.h
@@ -0,0 +1,118 @@
+/**************************************************************************
+ * 
+ * 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>
+  */
+
+#ifndef DRAW_PT_H
+#define DRAW_PT_H
+
+#include "pipe/p_compiler.h"
+
+typedef unsigned (*pt_elt_func)( const void *elts, unsigned idx );
+
+struct draw_pt_middle_end;
+struct draw_context;
+
+/* The "front end" - prepare sets of fetch, draw elements for the
+ * middle end.
+ *
+ * Currenly one version of this:
+ *    - vcache - catchall implementation, decomposes to TRI/LINE/POINT prims
+ * Later:
+ *    - varray, varray_split
+ *    - velement, velement_split
+ *
+ * Currenly only using the vcache version.
+ */
+struct draw_pt_front_end {
+   void (*prepare)( struct draw_pt_front_end *,
+                    struct draw_pt_middle_end * );
+
+   void (*run)( struct draw_pt_front_end *,
+                unsigned prim,
+                pt_elt_func elt_func,
+                const void *elt_ptr,
+                unsigned count );
+
+   void (*finish)( struct draw_pt_front_end * );
+   void (*destroy)( struct draw_pt_front_end * );
+};
+
+
+/* The "middle end" - prepares actual hardware vertices for the
+ * hardware backend.
+ *
+ * Currently two versions of this:
+ *     - fetch, vertex shade, cliptest, prim-pipeline
+ *     - fetch, emit (ie passthrough)
+ * Later:
+ *     - fetch, vertex shade, cliptest, maybe-pipeline, maybe-emit
+ *     - fetch, vertex shade, emit
+ *
+ * Currenly only using the passthrough version.
+ */
+struct draw_pt_middle_end {
+   void (*prepare)( struct draw_pt_middle_end * );
+
+   void (*run)( struct draw_pt_middle_end *,
+                unsigned prim,
+                const unsigned *fetch_elts,
+                unsigned fetch_count,
+                const ushort *draw_elts,
+                unsigned draw_count );
+
+   void (*finish)( struct draw_pt_middle_end * );
+   void (*destroy)( struct draw_pt_middle_end * );
+};
+
+
+/* The "back end" - supplied by the driver, defined in draw_vbuf.h.
+ *
+ * Not sure whether to wrap the prim pipeline up as an alternate
+ * backend.  Would be a win for everything except pure passthrough
+ * mode...  
+ */
+struct vbuf_render;
+
+
+/* Helper functions.
+ */
+pt_elt_func draw_pt_elt_func( struct draw_context *draw );
+const void *draw_pt_elt_ptr( struct draw_context *draw,
+                             unsigned start );
+
+/* Implementations:
+ */
+struct draw_pt_front_end *draw_pt_vcache( void );
+struct draw_pt_middle_end *draw_pt_fetch_emit( struct draw_context *draw );
+
+
+
+#endif