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 #include "lp_query.h"
  41
  42 #include "draw/draw_context.h"
  43
  44
  45
  46 /**
  47  * Draw vertex arrays, with optional indexing, optional instancing.
  48  * All the other drawing functions are implemented in terms of this function.
  49  * Basically, map the vertex buffers (and drawing surfaces), then hand off
  50  * the drawing to the 'draw' module.
  51  */
  52 static void
  53 llvmpipe_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
  54 {
  55    struct llvmpipe_context *lp = llvmpipe_context(pipe);
  56    struct draw_context *draw = lp->draw;
  57    const void *mapped_indices = NULL;
  58    unsigned i;
  59
  60    if (!llvmpipe_check_render_cond(lp))
  61       return;
  62
  63    if (lp->dirty)
  64       llvmpipe_update_derived( lp );
  65
  66    /*
  67     * Map vertex buffers
  68     */
  69    for (i = 0; i < lp->num_vertex_buffers; i++) {
  70       const void *buf = lp->vertex_buffer[i].user_buffer;
  71       if (!buf) {
  72          if (!lp->vertex_buffer[i].buffer) {
  73             continue;
  74          }
  75          buf = llvmpipe_resource_data(lp->vertex_buffer[i].buffer);
  76       }
  77       draw_set_mapped_vertex_buffer(draw, i, buf);
  78    }
  79
  80    /* Map index buffer, if present */
  81    if (info->indexed) {
  82       mapped_indices = lp->index_buffer.user_buffer;
  83       if (!mapped_indices)
  84          mapped_indices = llvmpipe_resource_data(lp->index_buffer.buffer);
  85
  86       draw_set_indexes(draw,
  87                        (ubyte *) mapped_indices + lp->index_buffer.offset,
  88                        lp->index_buffer.index_size);
  89    }
  90
  91    for (i = 0; i < lp->num_so_targets; i++) {
  92       void *buf = 0;
  93       if (lp->so_targets[i]) {
  94          buf = llvmpipe_resource(lp->so_targets[i]->target.buffer)->data;
  95          lp->so_targets[i]->mapping = buf;
  96       }
  97    }
  98    draw_set_mapped_so_targets(draw, lp->num_so_targets,
  99                               lp->so_targets);
 100
 101    llvmpipe_prepare_vertex_sampling(lp,
 102                                     lp->num_sampler_views[PIPE_SHADER_VERTEX],
 103                                     lp->sampler_views[PIPE_SHADER_VERTEX]);
 104    llvmpipe_prepare_geometry_sampling(lp,
 105                                       lp->num_sampler_views[PIPE_SHADER_GEOMETRY],
 106                                       lp->sampler_views[PIPE_SHADER_GEOMETRY]);
 107    if (lp->gs && !lp->gs->shader.tokens) {
 108       /* we have an empty geometry shader with stream output, so
 109          attach the stream output info to the current vertex shader */
 110       if (lp->vs) {
 111          draw_vs_attach_so(lp->vs->draw_data, &lp->gs->shader.stream_output);
 112       }
 113    }
 114    draw_collect_pipeline_statistics(draw,
 115                                     lp->active_statistics_queries > 0);
 116
 117    /* draw! */
 118    draw_vbo(draw, info);
 119
 120    /*
 121     * unmap vertex/index buffers
 122     */
 123    for (i = 0; i < lp->num_vertex_buffers; i++) {
 124       draw_set_mapped_vertex_buffer(draw, i, NULL);
 125    }
 126    if (mapped_indices) {
 127       draw_set_indexes(draw, NULL, 0);
 128    }
 129    draw_set_mapped_so_targets(draw, 0, NULL);
 130
 131    if (lp->gs && !lp->gs->shader.tokens) {
 132       /* we have attached stream output to the vs for rendering,
 133          now lets reset it */
 134       if (lp->vs) {
 135          draw_vs_reset_so(lp->vs->draw_data);
 136       }
 137    }
 138
 139    llvmpipe_cleanup_vertex_sampling(lp);
 140    llvmpipe_cleanup_geometry_sampling(lp);
 141
 142    /*
 143     * TODO: Flush only when a user vertex/index buffer is present
 144     * (or even better, modify draw module to do this
 145     * internally when this condition is seen?)
 146     */
 147    draw_flush(draw);
 148 }
 149
 150
 151 void
 152 llvmpipe_init_draw_funcs(struct llvmpipe_context *llvmpipe)
 153 {
 154    llvmpipe->pipe.draw_vbo = llvmpipe_draw_vbo;
 155 }