/**************************************************************************
 * 
 * Copyright 2009 VMWare Inc.
 * 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.
 * 
 **************************************************************************/

#ifndef DRAW_GS_H
#define DRAW_GS_H

#include "draw_context.h"
#include "draw_private.h"


#define MAX_TGSI_PRIMITIVES 4

struct draw_context;

/**
 * Private version of the compiled geometry shader
 */
struct draw_geometry_shader {
   struct draw_context *draw;

   struct tgsi_exec_machine *machine;

   /* This member will disappear shortly:*/
   struct pipe_shader_state state;

   struct tgsi_shader_info info;
   unsigned position_output;

   unsigned max_output_vertices;
   unsigned input_primitive;
   unsigned output_primitive;

   /* Extracted from shader:
    */
   const float (*immediates)[4];
};

void draw_geometry_shader_run(struct draw_geometry_shader *shader,
                              const float (*input)[4],
                              float (*output)[4],
                              const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
                              unsigned count,
                              unsigned input_stride,
                              unsigned output_stride);

void draw_geometry_shader_prepare(struct draw_geometry_shader *shader,
                                  struct draw_context *draw);

void draw_geometry_shader_delete(struct draw_geometry_shader *shader);


#endif