src/gallium/drivers/llvmpipe/lp_draw_arrays.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /* Author:
  29  *    Brian Paul
  30  *    Keith Whitwell
  31  */
  32
  33
  34 #include "pipe/p_defines.h"
  35 #include "pipe/p_context.h"
  36 #include "util/u_prim.h"
  37
  38 #include "lp_context.h"
  39 #include "lp_state.h"
  40
  41 #include "draw/draw_context.h"
  42
  43
  44
  45 /**
  46  * Draw vertex arrays, with optional indexing, optional instancing.
  47  * All the other drawing functions are implemented in terms of this function.
  48  * Basically, map the vertex buffers (and drawing surfaces), then hand off
  49  * the drawing to the 'draw' module.
  50  */
  51 static void
  52 llvmpipe_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
  53 {
  54    struct llvmpipe_context *lp = llvmpipe_context(pipe);
  55    struct draw_context *draw = lp->draw;
  56    void *mapped_indices = NULL;
  57    unsigned i;
  58
  59    if (!llvmpipe_check_render_cond(lp))
  60       return;
  61
  62    if (lp->dirty)
  63       llvmpipe_update_derived( lp );
  64
  65    /*
  66     * Map vertex buffers
  67     */
  68    for (i = 0; i < lp->num_vertex_buffers; i++) {
  69       void *buf = llvmpipe_resource_data(lp->vertex_buffer[i].buffer);
  70       draw_set_mapped_vertex_buffer(draw, i, buf);
  71    }
  72
  73    /* Map index buffer, if present */
  74    if (info->indexed && lp->index_buffer.buffer)
  75       mapped_indices = llvmpipe_resource_data(lp->index_buffer.buffer);
  76
  77    draw_set_mapped_index_buffer(draw, mapped_indices);
  78
  79    llvmpipe_prepare_vertex_sampling(lp,
  80                                     lp->num_vertex_sampler_views,
  81                                     lp->vertex_sampler_views);
  82
  83    /* draw! */
  84    draw_vbo(draw, info);
  85
  86    /*
  87     * unmap vertex/index buffers
  88     */
  89    for (i = 0; i < lp->num_vertex_buffers; i++) {
  90       draw_set_mapped_vertex_buffer(draw, i, NULL);
  91    }
  92    if (mapped_indices) {
  93       draw_set_mapped_index_buffer(draw, NULL);
  94    }
  95    llvmpipe_cleanup_vertex_sampling(lp);
  96
  97    /*
  98     * TODO: Flush only when a user vertex/index buffer is present
  99     * (or even better, modify draw module to do this
 100     * internally when this condition is seen?)
 101     */
 102    draw_flush(draw);
 103 }
 104
 105
 106 void
 107 llvmpipe_init_draw_funcs(struct llvmpipe_context *llvmpipe)
 108 {
 109    llvmpipe->pipe.draw_vbo = llvmpipe_draw_vbo;
 110 }