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                                        int indexBias,
  61                                        unsigned minIndex,
  62                                        unsigned maxIndex,
  63                                        unsigned mode,
  64                                        unsigned start,
  65                                        unsigned count,
  66                                        unsigned startInstance,
  67                                        unsigned instanceCount);
  68
  69
  70 void
  71 softpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
  72                      unsigned start, unsigned count)
  73 {
  74    softpipe_draw_range_elements_instanced(pipe,
  75                                           NULL,
  76                                           0,
  77                                           0,
  78                                           0,
  79                                           0xffffffff,
  80                                           mode,
  81                                           start,
  82                                           count,
  83                                           0,
  84                                           1);
  85 }
  86
  87
  88 void
  89 softpipe_draw_range_elements(struct pipe_context *pipe,
  90                              struct pipe_resource *indexBuffer,
  91                              unsigned indexSize,
  92                              int indexBias,
  93                              unsigned min_index,
  94                              unsigned max_index,
  95                              unsigned mode, unsigned start, unsigned count)
  96 {
  97    softpipe_draw_range_elements_instanced(pipe,
  98                                           indexBuffer,
  99                                           indexSize,
 100                                           indexBias,
 101                                           min_index,
 102                                           max_index,
 103                                           mode,
 104                                           start,
 105                                           count,
 106                                           0,
 107                                           1);
 108 }
 109
 110
 111 void
 112 softpipe_draw_elements(struct pipe_context *pipe,
 113                        struct pipe_resource *indexBuffer,
 114                        unsigned indexSize, int indexBias,
 115                        unsigned mode, unsigned start, unsigned count)
 116 {
 117    softpipe_draw_range_elements_instanced(pipe,
 118                                           indexBuffer,
 119                                           indexSize,
 120                                           indexBias,
 121                                           0,
 122                                           0xffffffff,
 123                                           mode,
 124                                           start,
 125                                           count,
 126                                           0,
 127                                           1);
 128 }
 129
 130 void
 131 softpipe_draw_arrays_instanced(struct pipe_context *pipe,
 132                                unsigned mode,
 133                                unsigned start,
 134                                unsigned count,
 135                                unsigned startInstance,
 136                                unsigned instanceCount)
 137 {
 138    softpipe_draw_range_elements_instanced(pipe,
 139                                           NULL,
 140                                           0,
 141                                           0,
 142                                           0,
 143                                           0xffffffff,
 144                                           mode,
 145                                           start,
 146                                           count,
 147                                           startInstance,
 148                                           instanceCount);
 149 }
 150
 151 void
 152 softpipe_draw_elements_instanced(struct pipe_context *pipe,
 153                                  struct pipe_resource *indexBuffer,
 154                                  unsigned indexSize,
 155                                  int indexBias,
 156                                  unsigned mode,
 157                                  unsigned start,
 158                                  unsigned count,
 159                                  unsigned startInstance,
 160                                  unsigned instanceCount)
 161 {
 162    softpipe_draw_range_elements_instanced(pipe,
 163                                           indexBuffer,
 164                                           indexSize,
 165                                           indexBias,
 166                                           0,
 167                                           0xffffffff,
 168                                           mode,
 169                                           start,
 170                                           count,
 171                                           startInstance,
 172                                           instanceCount);
 173 }
 174
 175 static void
 176 softpipe_draw_range_elements_instanced(struct pipe_context *pipe,
 177                                        struct pipe_resource *indexBuffer,
 178                                        unsigned indexSize,
 179                                        int indexBias,
 180                                        unsigned minIndex,
 181                                        unsigned maxIndex,
 182                                        unsigned mode,
 183                                        unsigned start,
 184                                        unsigned count,
 185                                        unsigned startInstance,
 186                                        unsigned instanceCount)
 187 {
 188    struct softpipe_context *sp = softpipe_context(pipe);
 189    struct draw_context *draw = sp->draw;
 190    unsigned i;
 191
 192    if (!softpipe_check_render_cond(sp))
 193       return;
 194
 195    sp->reduced_api_prim = u_reduced_prim(mode);
 196
 197    if (sp->dirty) {
 198       softpipe_update_derived(sp);
 199    }
 200
 201    softpipe_map_transfers(sp);
 202
 203    /* Map vertex buffers */
 204    for (i = 0; i < sp->num_vertex_buffers; i++) {
 205       void *buf = softpipe_resource(sp->vertex_buffer[i].buffer)->data;
 206       draw_set_mapped_vertex_buffer(draw, i, buf);
 207    }
 208
 209    /* Map index buffer, if present */
 210    if (indexBuffer) {
 211       void *mapped_indexes = softpipe_resource(indexBuffer)->data;
 212       draw_set_mapped_element_buffer_range(draw,
 213                                            indexSize,
 214                                            indexBias,
 215                                            minIndex,
 216                                            maxIndex,
 217                                            mapped_indexes);
 218    } else {
 219       /* no index/element buffer */
 220       draw_set_mapped_element_buffer_range(draw,
 221                                            0, 0,
 222                                            start,
 223                                            start + count - 1,
 224                                            NULL);
 225    }
 226
 227    /* draw! */
 228    draw_arrays_instanced(draw, mode, start, count, startInstance, instanceCount);
 229
 230    /* unmap vertex/index buffers - will cause draw module to flush */
 231    for (i = 0; i < sp->num_vertex_buffers; i++) {
 232       draw_set_mapped_vertex_buffer(draw, i, NULL);
 233    }
 234    if (indexBuffer) {
 235       draw_set_mapped_element_buffer(draw, 0, 0, NULL);
 236    }
 237
 238    /*
 239     * TODO: Flush only when a user vertex/index buffer is present
 240     * (or even better, modify draw module to do this
 241     * internally when this condition is seen?)
 242     */
 243    draw_flush(draw);
 244
 245    /* Note: leave drawing surfaces mapped */
 246    sp->dirty_render_cache = TRUE;
 247 }