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 void
  88 softpipe_draw_stream_output(struct pipe_context *pipe, unsigned mode)
  89 {
  90    struct softpipe_context *sp = softpipe_context(pipe);
  91    struct draw_context *draw = sp->draw;
  92    const unsigned start = 0;
  93    const unsigned count = sp->so_target.so_count[0];
  94    void *buf = sp->so_target.buffer[0]->data;
  95    int offset = sp->so_target.offset[0];
  96
  97    if (!softpipe_check_render_cond(sp) ||
  98        sp->so_target.num_buffers != 1)
  99       return;
 100
 101    sp->reduced_api_prim = u_reduced_prim(mode);
 102
 103    if (sp->dirty) {
 104       softpipe_update_derived(sp);
 105    }
 106
 107    softpipe_map_transfers(sp);
 108
 109    /* Map so buffers */
 110    if (offset < 0) /* we were appending so start from beginning */
 111       offset = 0;
 112    buf = (void*)((int32_t*)buf + offset);
 113    draw_set_mapped_vertex_buffer(draw, 0, buf);
 114
 115    draw_set_mapped_element_buffer_range(draw,
 116                                         0, 0,
 117                                         start,
 118                                         start + count - 1,
 119                                         NULL);
 120
 121    /* draw! */
 122    draw_arrays_instanced(draw, mode, start, count, 0, 1);
 123
 124    /* unmap vertex/index buffers - will cause draw module to flush */
 125    draw_set_mapped_vertex_buffer(draw, 0, NULL);
 126
 127    /*
 128     * TODO: Flush only when a user vertex/index buffer is present
 129     * (or even better, modify draw module to do this
 130     * internally when this condition is seen?)
 131     */
 132    draw_flush(draw);
 133
 134    /* Note: leave drawing surfaces mapped */
 135    sp->dirty_render_cache = TRUE;
 136 }
 137
 138
 139 void
 140 softpipe_draw_range_elements(struct pipe_context *pipe,
 141                              struct pipe_resource *indexBuffer,
 142                              unsigned indexSize,
 143                              int indexBias,
 144                              unsigned min_index,
 145                              unsigned max_index,
 146                              unsigned mode, unsigned start, unsigned count)
 147 {
 148    softpipe_draw_range_elements_instanced(pipe,
 149                                           indexBuffer,
 150                                           indexSize,
 151                                           indexBias,
 152                                           min_index,
 153                                           max_index,
 154                                           mode,
 155                                           start,
 156                                           count,
 157                                           0,
 158                                           1);
 159 }
 160
 161
 162 void
 163 softpipe_draw_elements(struct pipe_context *pipe,
 164                        struct pipe_resource *indexBuffer,
 165                        unsigned indexSize, int indexBias,
 166                        unsigned mode, unsigned start, unsigned count)
 167 {
 168    softpipe_draw_range_elements_instanced(pipe,
 169                                           indexBuffer,
 170                                           indexSize,
 171                                           indexBias,
 172                                           0,
 173                                           0xffffffff,
 174                                           mode,
 175                                           start,
 176                                           count,
 177                                           0,
 178                                           1);
 179 }
 180
 181 void
 182 softpipe_draw_arrays_instanced(struct pipe_context *pipe,
 183                                unsigned mode,
 184                                unsigned start,
 185                                unsigned count,
 186                                unsigned startInstance,
 187                                unsigned instanceCount)
 188 {
 189    softpipe_draw_range_elements_instanced(pipe,
 190                                           NULL,
 191                                           0,
 192                                           0,
 193                                           0,
 194                                           0xffffffff,
 195                                           mode,
 196                                           start,
 197                                           count,
 198                                           startInstance,
 199                                           instanceCount);
 200 }
 201
 202 void
 203 softpipe_draw_elements_instanced(struct pipe_context *pipe,
 204                                  struct pipe_resource *indexBuffer,
 205                                  unsigned indexSize,
 206                                  int indexBias,
 207                                  unsigned mode,
 208                                  unsigned start,
 209                                  unsigned count,
 210                                  unsigned startInstance,
 211                                  unsigned instanceCount)
 212 {
 213    softpipe_draw_range_elements_instanced(pipe,
 214                                           indexBuffer,
 215                                           indexSize,
 216                                           indexBias,
 217                                           0,
 218                                           0xffffffff,
 219                                           mode,
 220                                           start,
 221                                           count,
 222                                           startInstance,
 223                                           instanceCount);
 224 }
 225
 226 static void
 227 softpipe_draw_range_elements_instanced(struct pipe_context *pipe,
 228                                        struct pipe_resource *indexBuffer,
 229                                        unsigned indexSize,
 230                                        int indexBias,
 231                                        unsigned minIndex,
 232                                        unsigned maxIndex,
 233                                        unsigned mode,
 234                                        unsigned start,
 235                                        unsigned count,
 236                                        unsigned startInstance,
 237                                        unsigned instanceCount)
 238 {
 239    struct softpipe_context *sp = softpipe_context(pipe);
 240    struct draw_context *draw = sp->draw;
 241    unsigned i;
 242
 243    if (!softpipe_check_render_cond(sp))
 244       return;
 245
 246    sp->reduced_api_prim = u_reduced_prim(mode);
 247
 248    if (sp->dirty) {
 249       softpipe_update_derived(sp);
 250    }
 251
 252    softpipe_map_transfers(sp);
 253
 254    /* Map vertex buffers */
 255    for (i = 0; i < sp->num_vertex_buffers; i++) {
 256       void *buf = softpipe_resource(sp->vertex_buffer[i].buffer)->data;
 257       draw_set_mapped_vertex_buffer(draw, i, buf);
 258    }
 259
 260    /* Map index buffer, if present */
 261    if (indexBuffer) {
 262       void *mapped_indexes = softpipe_resource(indexBuffer)->data;
 263       draw_set_mapped_element_buffer_range(draw,
 264                                            indexSize,
 265                                            indexBias,
 266                                            minIndex,
 267                                            maxIndex,
 268                                            mapped_indexes);
 269    } else {
 270       /* no index/element buffer */
 271       draw_set_mapped_element_buffer_range(draw,
 272                                            0, 0,
 273                                            start,
 274                                            start + count - 1,
 275                                            NULL);
 276    }
 277
 278    /* draw! */
 279    draw_arrays_instanced(draw, mode, start, count, startInstance, instanceCount);
 280
 281    /* unmap vertex/index buffers - will cause draw module to flush */
 282    for (i = 0; i < sp->num_vertex_buffers; i++) {
 283       draw_set_mapped_vertex_buffer(draw, i, NULL);
 284    }
 285    if (indexBuffer) {
 286       draw_set_mapped_element_buffer(draw, 0, 0, NULL);
 287    }
 288
 289    /*
 290     * TODO: Flush only when a user vertex/index buffer is present
 291     * (or even better, modify draw module to do this
 292     * internally when this condition is seen?)
 293     */
 294    draw_flush(draw);
 295
 296    /* Note: leave drawing surfaces mapped */
 297    sp->dirty_render_cache = TRUE;
 298 }