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 void
  51 softpipe_draw_stream_output(struct pipe_context *pipe, unsigned mode)
  52 {
  53    struct softpipe_context *sp = softpipe_context(pipe);
  54    struct draw_context *draw = sp->draw;
  55    const unsigned start = 0;
  56    const unsigned count = sp->so_target.so_count[0];
  57    void *buf = sp->so_target.buffer[0]->data;
  58    int offset = sp->so_target.offset[0];
  59
  60    if (!softpipe_check_render_cond(sp) ||
  61        sp->so_target.num_buffers != 1)
  62       return;
  63
  64    sp->reduced_api_prim = u_reduced_prim(mode);
  65
  66    if (sp->dirty) {
  67       softpipe_update_derived(sp);
  68    }
  69
  70    softpipe_map_transfers(sp);
  71
  72    /* Map so buffers */
  73    if (offset < 0) /* we were appending so start from beginning */
  74       offset = 0;
  75    buf = (void*)((int32_t*)buf + offset);
  76    draw_set_mapped_vertex_buffer(draw, 0, buf);
  77
  78    draw_set_mapped_element_buffer_range(draw,
  79                                         0, 0,
  80                                         start,
  81                                         start + count - 1,
  82                                         NULL);
  83
  84    /* draw! */
  85    draw_arrays_instanced(draw, mode, start, count, 0, 1);
  86
  87    /* unmap vertex/index buffers - will cause draw module to flush */
  88    draw_set_mapped_vertex_buffer(draw, 0, NULL);
  89
  90    /*
  91     * TODO: Flush only when a user vertex/index buffer is present
  92     * (or even better, modify draw module to do this
  93     * internally when this condition is seen?)
  94     */
  95    draw_flush(draw);
  96
  97    /* Note: leave drawing surfaces mapped */
  98    sp->dirty_render_cache = TRUE;
  99 }
 100
 101
 102 /**
 103  * This function handles drawing indexed and non-indexed prims,
 104  * instanced and non-instanced drawing, with or without min/max element
 105  * indexes.
 106  * All the other drawing functions are expressed in terms of this
 107  * function.
 108  *
 109  * For non-indexed prims, indexBuffer should be NULL.
 110  * For non-instanced drawing, instanceCount should be 1.
 111  * When the min/max element indexes aren't known, minIndex should be 0
 112  * and maxIndex should be ~0.
 113  */
 114 static void
 115 softpipe_draw_range_elements_instanced(struct pipe_context *pipe,
 116                                        struct pipe_resource *indexBuffer,
 117                                        unsigned indexSize,
 118                                        int indexBias,
 119                                        unsigned minIndex,
 120                                        unsigned maxIndex,
 121                                        unsigned mode,
 122                                        unsigned start,
 123                                        unsigned count,
 124                                        unsigned startInstance,
 125                                        unsigned instanceCount)
 126 {
 127    struct softpipe_context *sp = softpipe_context(pipe);
 128    struct draw_context *draw = sp->draw;
 129    unsigned i;
 130
 131    if (!softpipe_check_render_cond(sp))
 132       return;
 133
 134    sp->reduced_api_prim = u_reduced_prim(mode);
 135
 136    if (sp->dirty) {
 137       softpipe_update_derived(sp);
 138    }
 139
 140    softpipe_map_transfers(sp);
 141
 142    /* Map vertex buffers */
 143    for (i = 0; i < sp->num_vertex_buffers; i++) {
 144       void *buf = softpipe_resource(sp->vertex_buffer[i].buffer)->data;
 145       draw_set_mapped_vertex_buffer(draw, i, buf);
 146    }
 147
 148    /* Map index buffer, if present */
 149    if (indexBuffer) {
 150       void *mapped_indexes = softpipe_resource(indexBuffer)->data;
 151       draw_set_mapped_element_buffer_range(draw,
 152                                            indexSize,
 153                                            indexBias,
 154                                            minIndex,
 155                                            maxIndex,
 156                                            mapped_indexes);
 157    } else {
 158       /* no index/element buffer */
 159       draw_set_mapped_element_buffer_range(draw,
 160                                            0, 0,
 161                                            start,
 162                                            start + count - 1,
 163                                            NULL);
 164    }
 165
 166    /* draw! */
 167    draw_arrays_instanced(draw, mode, start, count, startInstance, instanceCount);
 168
 169    /* unmap vertex/index buffers - will cause draw module to flush */
 170    for (i = 0; i < sp->num_vertex_buffers; i++) {
 171       draw_set_mapped_vertex_buffer(draw, i, NULL);
 172    }
 173    if (indexBuffer) {
 174       draw_set_mapped_element_buffer(draw, 0, 0, NULL);
 175    }
 176
 177    /*
 178     * TODO: Flush only when a user vertex/index buffer is present
 179     * (or even better, modify draw module to do this
 180     * internally when this condition is seen?)
 181     */
 182    draw_flush(draw);
 183
 184    /* Note: leave drawing surfaces mapped */
 185    sp->dirty_render_cache = TRUE;
 186 }
 187
 188
 189 void
 190 softpipe_draw_range_elements(struct pipe_context *pipe,
 191                              struct pipe_resource *indexBuffer,
 192                              unsigned indexSize,
 193                              int indexBias,
 194                              unsigned min_index,
 195                              unsigned max_index,
 196                              unsigned mode, unsigned start, unsigned count)
 197 {
 198    softpipe_draw_range_elements_instanced(pipe,
 199                                           indexBuffer,
 200                                           indexSize,
 201                                           indexBias,
 202                                           min_index,
 203                                           max_index,
 204                                           mode,
 205                                           start,
 206                                           count,
 207                                           0,
 208                                           1);
 209 }
 210
 211
 212 void
 213 softpipe_draw_elements(struct pipe_context *pipe,
 214                        struct pipe_resource *indexBuffer,
 215                        unsigned indexSize, int indexBias,
 216                        unsigned mode, unsigned start, unsigned count)
 217 {
 218    softpipe_draw_range_elements_instanced(pipe,
 219                                           indexBuffer,
 220                                           indexSize,
 221                                           indexBias,
 222                                           0,
 223                                           0xffffffff,
 224                                           mode,
 225                                           start,
 226                                           count,
 227                                           0,
 228                                           1);
 229 }
 230
 231 void
 232 softpipe_draw_arrays_instanced(struct pipe_context *pipe,
 233                                unsigned mode,
 234                                unsigned start,
 235                                unsigned count,
 236                                unsigned startInstance,
 237                                unsigned instanceCount)
 238 {
 239    softpipe_draw_range_elements_instanced(pipe,
 240                                           NULL,
 241                                           0,
 242                                           0,
 243                                           0,
 244                                           0xffffffff,
 245                                           mode,
 246                                           start,
 247                                           count,
 248                                           startInstance,
 249                                           instanceCount);
 250 }
 251
 252 void
 253 softpipe_draw_elements_instanced(struct pipe_context *pipe,
 254                                  struct pipe_resource *indexBuffer,
 255                                  unsigned indexSize,
 256                                  int indexBias,
 257                                  unsigned mode,
 258                                  unsigned start,
 259                                  unsigned count,
 260                                  unsigned startInstance,
 261                                  unsigned instanceCount)
 262 {
 263    softpipe_draw_range_elements_instanced(pipe,
 264                                           indexBuffer,
 265                                           indexSize,
 266                                           indexBias,
 267                                           0,
 268                                           0xffffffff,
 269                                           mode,
 270                                           start,
 271                                           count,
 272                                           startInstance,
 273                                           instanceCount);
 274 }
 275
 276 void
 277 softpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
 278                      unsigned start, unsigned count)
 279 {
 280    softpipe_draw_range_elements_instanced(pipe,
 281                                           NULL,
 282                                           0,
 283                                           0,
 284                                           0,
 285                                           0xffffffff,
 286                                           mode,
 287                                           start,
 288                                           count,
 289                                           0,
 290                                           1);
 291 }
 292