/**************************************************************************
 * 
 * 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.
 * 
 **************************************************************************/

/* Author:
 *    Brian Paul
 */


#ifndef DRAW_VERTEX_H
#define DRAW_VERTEX_H

#include "pipe/tgsi/exec/tgsi_attribs.h"


#define MAX_VERT_ATTRIBS 12  /* OK? */

#define FORMAT_OMIT 0
#define FORMAT_1F   1
#define FORMAT_2F   2
#define FORMAT_3F   3
#define FORMAT_4F   4
#define FORMAT_4F_VIEWPORT   4
#define FORMAT_4UB  5


enum interp_mode {
   INTERP_NONE,      /**< never interpolate vertex header info */
   INTERP_CONSTANT,
   INTERP_LINEAR,
   INTERP_PERSPECTIVE
};



struct vertex_info
{
   uint num_attribs;
   uint hwfmt[4];      /**< hardware format info for this format */
   uint attr_mask;     /**< mask of VF_ATTR_ bits */
   uint slot_to_attrib[MAX_VERT_ATTRIBS];
   uint attrib_to_slot[TGSI_ATTRIB_MAX];
   uint interp_mode[MAX_VERT_ATTRIBS];
   uint format[MAX_VERT_ATTRIBS];   /**< FORMAT_x */
   uint size;          /**< total vertex size in dwords */
};



/**
 * Add another attribute to the given vertex_info object.
 * \return slot in which the attribute was added
 */
static INLINE uint
draw_emit_vertex_attr(struct vertex_info *vinfo, uint vfAttr, uint format,
                      uint interp)
{
   const uint n = vinfo->num_attribs;
   vinfo->attr_mask |= (1 << vfAttr);
   vinfo->slot_to_attrib[n] = vfAttr;
   vinfo->format[n] = format;
   vinfo->interp_mode[n] = interp;
   vinfo->num_attribs++;
   return n;
}



struct draw_context;

extern int draw_vertex_cache_check_space( struct draw_context *draw, 
					  unsigned nr_verts );

extern void draw_vertex_cache_validate( struct draw_context *draw );
extern void draw_vertex_cache_invalidate( struct draw_context *draw );
extern void draw_vertex_cache_unreference( struct draw_context *draw );

extern void draw_vertex_shader_queue_flush( struct draw_context *draw );

struct tgsi_exec_machine;

extern void draw_vertex_fetch( struct draw_context *draw,
			       struct tgsi_exec_machine *machine,
			       const unsigned *elts,
			       unsigned count );


#endif /* DRAW_VERTEX_H */