Subversion Repositories Kolibri OS

/**************************************************************************

 *

 * 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

 *    Keith Whitwell

 */

#include "pipe/p_defines.h"

#include "pipe/p_context.h"

#include "util/u_inlines.h"

#include "util/u_prim.h"

#include "sp_context.h"

#include "sp_query.h"

#include "sp_state.h"

#include "sp_texture.h"

#include "draw/draw_context.h"

/**

 * This function handles drawing indexed and non-indexed prims,

 * instanced and non-instanced drawing, with or without min/max element

 * indexes.

 * All the other drawing functions are expressed in terms of this

 * function.

 *

 * For non-indexed prims, indexBuffer should be NULL.

 * For non-instanced drawing, instanceCount should be 1.

 * When the min/max element indexes aren't known, minIndex should be 0

 * and maxIndex should be ~0.

 */

void

softpipe_draw_vbo(struct pipe_context *pipe,

                  const struct pipe_draw_info *info)

{

   struct softpipe_context *sp = softpipe_context(pipe);

   struct draw_context *draw = sp->draw;

   const void *mapped_indices = NULL;

   unsigned i;

   if (!softpipe_check_render_cond(sp))

      return;

   sp->reduced_api_prim = u_reduced_prim(info->mode);

   if (sp->dirty) {

      softpipe_update_derived(sp, sp->reduced_api_prim);

   }

   /* Map vertex buffers */

   for (i = 0; i < sp->num_vertex_buffers; i++) {

      const void *buf = sp->vertex_buffer[i].user_buffer;

      size_t size = ~0;

      if (!buf) {

         if (!sp->vertex_buffer[i].buffer) {

            continue;

         }

         buf = softpipe_resource(sp->vertex_buffer[i].buffer)->data;

         size = sp->vertex_buffer[i].buffer->width0;

      }

      draw_set_mapped_vertex_buffer(draw, i, buf, size);

   }

   /* Map index buffer, if present */

   if (info->indexed) {

      unsigned available_space = ~0;

      mapped_indices = sp->index_buffer.user_buffer;

      if (!mapped_indices) {

         mapped_indices = softpipe_resource(sp->index_buffer.buffer)->data;

         if (sp->index_buffer.buffer->width0 > sp->index_buffer.offset)

            available_space =

               (sp->index_buffer.buffer->width0 - sp->index_buffer.offset);

         else

            available_space = 0;

      }

      draw_set_indexes(draw,

                       (ubyte *) mapped_indices + sp->index_buffer.offset,

                       sp->index_buffer.index_size, available_space);

   }

   for (i = 0; i < sp->num_so_targets; i++) {

      void *buf = softpipe_resource(sp->so_targets[i]->target.buffer)->data;

      sp->so_targets[i]->mapping = buf;

   }

   draw_set_mapped_so_targets(draw, sp->num_so_targets,

                              sp->so_targets);

   if (sp->gs && !sp->gs->shader.tokens) {

      /* we have an empty geometry shader with stream output, so

         attach the stream output info to the current vertex shader */

      if (sp->vs) {

         draw_vs_attach_so(sp->vs->draw_data, &sp->gs->shader.stream_output);

      }

   }

   draw_collect_pipeline_statistics(draw,

                                    sp->active_statistics_queries > 0);

   /* draw! */

   draw_vbo(draw, info);

   /* unmap vertex/index buffers - will cause draw module to flush */

   for (i = 0; i < sp->num_vertex_buffers; i++) {

      draw_set_mapped_vertex_buffer(draw, i, NULL, 0);

   }

   if (mapped_indices) {

      draw_set_indexes(draw, NULL, 0, 0);

   }

   draw_set_mapped_so_targets(draw, 0, NULL);

   /*

    * TODO: Flush only when a user vertex/index buffer is present

    * (or even better, modify draw module to do this

    * internally when this condition is seen?)

    */

   draw_flush(draw);

   /* Note: leave drawing surfaces mapped */

   sp->dirty_render_cache = TRUE;

}