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

#include "lp_context.h"
#include "lp_state.h"
#include "lp_texture.h"

#include "pipe/p_defines.h"
#include "util/u_memory.h"
#include "util/u_inlines.h"
#include "draw/draw_context.h"
#include "tgsi/tgsi_dump.h"
#include "tgsi/tgsi_scan.h"
#include "tgsi/tgsi_parse.h"


static void *
llvmpipe_create_gs_state(struct pipe_context *pipe,
                         const struct pipe_shader_state *templ)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
   struct lp_geometry_shader *state;

   state = CALLOC_STRUCT(lp_geometry_shader);
   if (state == NULL )
      goto fail;

   /* debug */
   if (0)
      tgsi_dump(templ->tokens, 0);

   /* copy stream output info */
   state->shader = *templ;
   if (templ->tokens) {
      /* copy shader tokens, the ones passed in will go away. */
      state->shader.tokens = tgsi_dup_tokens(templ->tokens);
      if (state->shader.tokens == NULL)
         goto fail;

      state->draw_data = draw_create_geometry_shader(llvmpipe->draw, templ);
      if (state->draw_data == NULL)
         goto fail;
   }

   return state;

fail:
   if (state) {
      FREE( (void *)state->shader.tokens );
      FREE( state->draw_data );
      FREE( state );
   }
   return NULL;
}


static void
llvmpipe_bind_gs_state(struct pipe_context *pipe, void *gs)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);

   llvmpipe->gs = (struct lp_geometry_shader *)gs;

   draw_bind_geometry_shader(llvmpipe->draw,
                             (llvmpipe->gs ? llvmpipe->gs->draw_data : NULL));

   llvmpipe->dirty |= LP_NEW_GS;
}


static void
llvmpipe_delete_gs_state(struct pipe_context *pipe, void *gs)
{
   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);

   struct lp_geometry_shader *state =
      (struct lp_geometry_shader *)gs;

   draw_delete_geometry_shader(llvmpipe->draw,
                               (state) ? state->draw_data : 0);
   FREE( (void *)state->shader.tokens );
   FREE(state);
}


void
llvmpipe_init_gs_funcs(struct llvmpipe_context *llvmpipe)
{
   llvmpipe->pipe.create_gs_state = llvmpipe_create_gs_state;
   llvmpipe->pipe.bind_gs_state   = llvmpipe_bind_gs_state;
   llvmpipe->pipe.delete_gs_state = llvmpipe_delete_gs_state;
}