src/gallium/drivers/softpipe/sp_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_inlines.h"
  37 #include "util/u_prim.h"
  38
  39 #include "sp_context.h"
  40 #include "sp_query.h"
  41 #include "sp_state.h"
  42 #include "sp_texture.h"
  43
  44 #include "draw/draw_context.h"
  45
  46
  47
  48
  49
  50
  51 /**
  52  * Draw vertex arrays, with optional indexing.
  53  * Basically, map the vertex buffers (and drawing surfaces), then hand off
  54  * the drawing to the 'draw' module.
  55  */
  56 static void
  57 softpipe_draw_range_elements_instanced(struct pipe_context *pipe,
  58                                        struct pipe_resource *indexBuffer,
  59                                        unsigned indexSize,
  60                                        unsigned minIndex,
  61                                        unsigned maxIndex,
  62                                        unsigned mode,
  63                                        unsigned start,
  64                                        unsigned count,
  65                                        unsigned startInstance,
  66                                        unsigned instanceCount);
  67
  68
  69 void
  70 softpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
  71                      unsigned start, unsigned count)
  72 {
  73    softpipe_draw_range_elements_instanced(pipe,
  74                                           NULL,
  75                                           0,
  76                                           0,
  77                                           0xffffffff,
  78                                           mode,
  79                                           start,
  80                                           count,
  81                                           0,
  82                                           1);
  83 }
  84
  85
  86 void
  87 softpipe_draw_range_elements(struct pipe_context *pipe,
  88                              struct pipe_resource *indexBuffer,
  89                              unsigned indexSize,
  90                              unsigned min_index,
  91                              unsigned max_index,
  92                              unsigned mode, unsigned start, unsigned count)
  93 {
  94    softpipe_draw_range_elements_instanced(pipe,
  95                                           indexBuffer,
  96                                           indexSize,
  97                                           min_index,
  98                                           max_index,
  99                                           mode,
 100                                           start,
 101                                           count,
 102                                           0,
 103                                           1);
 104 }
 105
 106
 107 void
 108 softpipe_draw_elements(struct pipe_context *pipe,
 109                        struct pipe_resource *indexBuffer,
 110                        unsigned indexSize,
 111                        unsigned mode, unsigned start, unsigned count)
 112 {
 113    softpipe_draw_range_elements_instanced(pipe,
 114                                           indexBuffer,
 115                                           indexSize,
 116                                           0,
 117                                           0xffffffff,
 118                                           mode,
 119                                           start,
 120                                           count,
 121                                           0,
 122                                           1);
 123 }
 124
 125 void
 126 softpipe_draw_arrays_instanced(struct pipe_context *pipe,
 127                                unsigned mode,
 128                                unsigned start,
 129                                unsigned count,
 130                                unsigned startInstance,
 131                                unsigned instanceCount)
 132 {
 133    softpipe_draw_range_elements_instanced(pipe,
 134                                           NULL,
 135                                           0,
 136                                           0,
 137                                           0xffffffff,
 138                                           mode,
 139                                           start,
 140                                           count,
 141                                           startInstance,
 142                                           instanceCount);
 143 }
 144
 145 void
 146 softpipe_draw_elements_instanced(struct pipe_context *pipe,
 147                                  struct pipe_resource *indexBuffer,
 148                                  unsigned indexSize,
 149                                  unsigned mode,
 150                                  unsigned start,
 151                                  unsigned count,
 152                                  unsigned startInstance,
 153                                  unsigned instanceCount)
 154 {
 155    softpipe_draw_range_elements_instanced(pipe,
 156                                           indexBuffer,
 157                                           indexSize,
 158                                           0,
 159                                           0xffffffff,
 160                                           mode,
 161                                           start,
 162                                           count,
 163                                           startInstance,
 164                                           instanceCount);
 165 }
 166
 167 static void
 168 softpipe_draw_range_elements_instanced(struct pipe_context *pipe,
 169                                        struct pipe_resource *indexBuffer,
 170                                        unsigned indexSize,
 171                                        unsigned minIndex,
 172                                        unsigned maxIndex,
 173                                        unsigned mode,
 174                                        unsigned start,
 175                                        unsigned count,
 176                                        unsigned startInstance,
 177                                        unsigned instanceCount)
 178 {
 179    struct softpipe_context *sp = softpipe_context(pipe);
 180    struct draw_context *draw = sp->draw;
 181    unsigned i;
 182
 183    if (!softpipe_check_render_cond(sp))
 184       return;
 185
 186    sp->reduced_api_prim = u_reduced_prim(mode);
 187
 188    if (sp->dirty) {
 189       softpipe_update_derived(sp);
 190    }
 191
 192    softpipe_map_transfers(sp);
 193
 194    /* Map vertex buffers */
 195    for (i = 0; i < sp->num_vertex_buffers; i++) {
 196       void *buf = softpipe_resource(sp->vertex_buffer[i].buffer)->data;
 197       draw_set_mapped_vertex_buffer(draw, i, buf);
 198    }
 199
 200    /* Map index buffer, if present */
 201    if (indexBuffer) {
 202       void *mapped_indexes = softpipe_resource(indexBuffer)->data;
 203       draw_set_mapped_element_buffer_range(draw,
 204                                            indexSize,
 205                                            minIndex,
 206                                            maxIndex,
 207                                            mapped_indexes);
 208    } else {
 209       /* no index/element buffer */
 210       draw_set_mapped_element_buffer_range(draw,
 211                                            0,
 212                                            start,
 213                                            start + count - 1,
 214                                            NULL);
 215    }
 216
 217    /* draw! */
 218    draw_arrays_instanced(draw, mode, start, count, startInstance, instanceCount);
 219
 220    /* unmap vertex/index buffers - will cause draw module to flush */
 221    for (i = 0; i < sp->num_vertex_buffers; i++) {
 222       draw_set_mapped_vertex_buffer(draw, i, NULL);
 223    }
 224    if (indexBuffer) {
 225       draw_set_mapped_element_buffer(draw, 0, NULL);
 226    }
 227
 228    /*
 229     * TODO: Flush only when a user vertex/index buffer is present
 230     * (or even better, modify draw module to do this
 231     * internally when this condition is seen?)
 232     */
 233    draw_flush(draw);
 234
 235    /* Note: leave drawing surfaces mapped */
 236    sp->dirty_render_cache = TRUE;
 237 }