src/gallium/drivers/softpipe/sp_draw_arrays.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   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 VMWARE 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_inlines.h"
  37 #include "util/u_draw.h"
  38 #include "util/u_prim.h"
  39
  40 #include "sp_context.h"
  41 #include "sp_query.h"
  42 #include "sp_state.h"
  43 #include "sp_texture.h"
  44 #include "sp_screen.h"
  45
  46 #include "draw/draw_context.h"
  47
  48 /**
  49  * This function handles drawing indexed and non-indexed prims,
  50  * instanced and non-instanced drawing, with or without min/max element
  51  * indexes.
  52  * All the other drawing functions are expressed in terms of this
  53  * function.
  54  *
  55  * For non-indexed prims, indexBuffer should be NULL.
  56  * For non-instanced drawing, instanceCount should be 1.
  57  * When the min/max element indexes aren't known, minIndex should be 0
  58  * and maxIndex should be ~0.
  59  */
  60 void
  61 softpipe_draw_vbo(struct pipe_context *pipe,
  62                   const struct pipe_draw_info *info)
  63 {
  64    struct softpipe_context *sp = softpipe_context(pipe);
  65    struct draw_context *draw = sp->draw;
  66    const void *mapped_indices = NULL;
  67    unsigned i;
  68
  69    if (!softpipe_check_render_cond(sp))
  70       return;
  71
  72    if (info->indirect) {
  73       util_draw_indirect(pipe, info);
  74       return;
  75    }
  76
  77    sp->reduced_api_prim = u_reduced_prim(info->mode);
  78
  79    if (sp->dirty) {
  80       softpipe_update_derived(sp, sp->reduced_api_prim);
  81    }
  82
  83    /* Map vertex buffers */
  84    for (i = 0; i < sp->num_vertex_buffers; i++) {
  85       const void *buf = sp->vertex_buffer[i].is_user_buffer ?
  86                            sp->vertex_buffer[i].buffer.user : NULL;
  87       size_t size = ~0;
  88       if (!buf) {
  89          if (!sp->vertex_buffer[i].buffer.resource) {
  90             continue;
  91          }
  92          buf = softpipe_resource_data(sp->vertex_buffer[i].buffer.resource);
  93          size = sp->vertex_buffer[i].buffer.resource->width0;
  94       }
  95       draw_set_mapped_vertex_buffer(draw, i, buf, size);
  96    }
  97
  98    /* Map index buffer, if present */
  99    if (info->index_size) {
 100       unsigned available_space = ~0;
 101       mapped_indices = info->has_user_indices ? info->index.user : NULL;
 102       if (!mapped_indices) {
 103          mapped_indices = softpipe_resource_data(info->index.resource);
 104          available_space = info->index.resource->width0;
 105       }
 106
 107       draw_set_indexes(draw,
 108                        (ubyte *) mapped_indices,
 109                        info->index_size, available_space);
 110    }
 111
 112
 113    for (i = 0; i < sp->num_so_targets; i++) {
 114       void *buf = 0;
 115       if (sp->so_targets[i]) {
 116          buf = softpipe_resource(sp->so_targets[i]->target.buffer)->data;
 117          sp->so_targets[i]->mapping = buf;
 118       }
 119    }
 120
 121    draw_set_mapped_so_targets(draw, sp->num_so_targets,
 122                               sp->so_targets);
 123
 124    if (softpipe_screen(sp->pipe.screen)->use_llvm) {
 125       softpipe_prepare_vertex_sampling(sp,
 126                                        sp->num_sampler_views[PIPE_SHADER_VERTEX],
 127                                        sp->sampler_views[PIPE_SHADER_VERTEX]);
 128       softpipe_prepare_geometry_sampling(sp,
 129                                          sp->num_sampler_views[PIPE_SHADER_GEOMETRY],
 130                                          sp->sampler_views[PIPE_SHADER_GEOMETRY]);
 131    }
 132
 133    if (sp->gs && !sp->gs->shader.tokens) {
 134       /* we have an empty geometry shader with stream output, so
 135          attach the stream output info to the current vertex shader */
 136       if (sp->vs) {
 137          draw_vs_attach_so(sp->vs->draw_data, &sp->gs->shader.stream_output);
 138       }
 139    }
 140    draw_collect_pipeline_statistics(draw,
 141                                     sp->active_statistics_queries > 0);
 142
 143    /* draw! */
 144    draw_vbo(draw, info);
 145
 146    /* unmap vertex/index buffers - will cause draw module to flush */
 147    for (i = 0; i < sp->num_vertex_buffers; i++) {
 148       draw_set_mapped_vertex_buffer(draw, i, NULL, 0);
 149    }
 150    if (mapped_indices) {
 151       draw_set_indexes(draw, NULL, 0, 0);
 152    }
 153
 154    draw_set_mapped_so_targets(draw, 0, NULL);
 155
 156    if (softpipe_screen(sp->pipe.screen)->use_llvm) {
 157       softpipe_cleanup_vertex_sampling(sp);
 158       softpipe_cleanup_geometry_sampling(sp);
 159    }
 160
 161    /*
 162     * TODO: Flush only when a user vertex/index buffer is present
 163     * (or even better, modify draw module to do this
 164     * internally when this condition is seen?)
 165     */
 166    draw_flush(draw);
 167
 168    /* Note: leave drawing surfaces mapped */
 169    sp->dirty_render_cache = TRUE;
 170 }