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_simple_screen.h"
  37 #include "util/u_inlines.h"
  38 #include "util/u_prim.h"
  39
  40 #include "sp_context.h"
  41 #include "sp_query.h"
  42 #include "sp_state.h"
  43
  44 #include "draw/draw_context.h"
  45
  46
  47
  48 static void
  49 softpipe_map_constant_buffers(struct softpipe_context *sp)
  50 {
  51    struct pipe_winsys *ws = sp->pipe.winsys;
  52    uint i;
  53
  54    for (i = 0; i < PIPE_SHADER_TYPES; i++) {
  55       uint j;
  56
  57       for (j = 0; j < PIPE_MAX_CONSTANT_BUFFERS; j++) {
  58          if (sp->constants[i][j] && sp->constants[i][j]->size) {
  59             sp->mapped_constants[i][j] = ws->buffer_map(ws,
  60                                                         sp->constants[i][j],
  61                                                         PIPE_BUFFER_USAGE_CPU_READ);
  62          }
  63       }
  64    }
  65
  66    for (i = 0; i < PIPE_MAX_CONSTANT_BUFFERS; i++) {
  67       if (sp->constants[PIPE_SHADER_VERTEX][i]) {
  68          draw_set_mapped_constant_buffer(sp->draw,
  69                                          PIPE_SHADER_VERTEX,
  70                                          i,
  71                                          sp->mapped_constants[PIPE_SHADER_VERTEX][i],
  72                                          sp->constants[PIPE_SHADER_VERTEX][i]->size);
  73       }
  74       if (sp->constants[PIPE_SHADER_GEOMETRY][i]) {
  75          draw_set_mapped_constant_buffer(sp->draw,
  76                                          PIPE_SHADER_GEOMETRY,
  77                                          i,
  78                                          sp->mapped_constants[PIPE_SHADER_GEOMETRY][i],
  79                                          sp->constants[PIPE_SHADER_GEOMETRY][i]->size);
  80       }
  81    }
  82 }
  83
  84
  85 static void
  86 softpipe_unmap_constant_buffers(struct softpipe_context *sp)
  87 {
  88    struct pipe_winsys *ws = sp->pipe.winsys;
  89    uint i;
  90
  91    /* really need to flush all prims since the vert/frag shaders const buffers
  92     * are going away now.
  93     */
  94    draw_flush(sp->draw);
  95
  96    for (i = 0; i < PIPE_MAX_CONSTANT_BUFFERS; i++) {
  97       draw_set_mapped_constant_buffer(sp->draw,
  98                                       PIPE_SHADER_VERTEX,
  99                                       i,
 100                                       NULL,
 101                                       0);
 102       draw_set_mapped_constant_buffer(sp->draw,
 103                                       PIPE_SHADER_GEOMETRY,
 104                                       i,
 105                                       NULL,
 106                                       0);
 107    }
 108
 109    for (i = 0; i < PIPE_SHADER_TYPES; i++) {
 110       uint j;
 111
 112       for (j = 0; j < PIPE_MAX_CONSTANT_BUFFERS; j++) {
 113          if (sp->constants[i][j] && sp->constants[i][j]->size) {
 114             ws->buffer_unmap(ws, sp->constants[i][j]);
 115          }
 116          sp->mapped_constants[i][j] = NULL;
 117       }
 118    }
 119 }
 120
 121
 122 /**
 123  * Draw vertex arrays, with optional indexing.
 124  * Basically, map the vertex buffers (and drawing surfaces), then hand off
 125  * the drawing to the 'draw' module.
 126  */
 127 static void
 128 softpipe_draw_range_elements_instanced(struct pipe_context *pipe,
 129                                        struct pipe_buffer *indexBuffer,
 130                                        unsigned indexSize,
 131                                        unsigned minIndex,
 132                                        unsigned maxIndex,
 133                                        unsigned mode,
 134                                        unsigned start,
 135                                        unsigned count,
 136                                        unsigned startInstance,
 137                                        unsigned instanceCount);
 138
 139
 140 void
 141 softpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
 142                      unsigned start, unsigned count)
 143 {
 144    softpipe_draw_range_elements_instanced(pipe,
 145                                           NULL,
 146                                           0,
 147                                           0,
 148                                           0xffffffff,
 149                                           mode,
 150                                           start,
 151                                           count,
 152                                           0,
 153                                           1);
 154 }
 155
 156
 157 void
 158 softpipe_draw_range_elements(struct pipe_context *pipe,
 159                              struct pipe_buffer *indexBuffer,
 160                              unsigned indexSize,
 161                              unsigned min_index,
 162                              unsigned max_index,
 163                              unsigned mode, unsigned start, unsigned count)
 164 {
 165    softpipe_draw_range_elements_instanced(pipe,
 166                                           indexBuffer,
 167                                           indexSize,
 168                                           min_index,
 169                                           max_index,
 170                                           mode,
 171                                           start,
 172                                           count,
 173                                           0,
 174                                           1);
 175 }
 176
 177
 178 void
 179 softpipe_draw_elements(struct pipe_context *pipe,
 180                        struct pipe_buffer *indexBuffer,
 181                        unsigned indexSize,
 182                        unsigned mode, unsigned start, unsigned count)
 183 {
 184    softpipe_draw_range_elements_instanced(pipe,
 185                                           indexBuffer,
 186                                           indexSize,
 187                                           0,
 188                                           0xffffffff,
 189                                           mode,
 190                                           start,
 191                                           count,
 192                                           0,
 193                                           1);
 194 }
 195
 196 void
 197 softpipe_draw_arrays_instanced(struct pipe_context *pipe,
 198                                unsigned mode,
 199                                unsigned start,
 200                                unsigned count,
 201                                unsigned startInstance,
 202                                unsigned instanceCount)
 203 {
 204    softpipe_draw_range_elements_instanced(pipe,
 205                                           NULL,
 206                                           0,
 207                                           0,
 208                                           0xffffffff,
 209                                           mode,
 210                                           start,
 211                                           count,
 212                                           startInstance,
 213                                           instanceCount);
 214 }
 215
 216 void
 217 softpipe_draw_elements_instanced(struct pipe_context *pipe,
 218                                  struct pipe_buffer *indexBuffer,
 219                                  unsigned indexSize,
 220                                  unsigned mode,
 221                                  unsigned start,
 222                                  unsigned count,
 223                                  unsigned startInstance,
 224                                  unsigned instanceCount)
 225 {
 226    softpipe_draw_range_elements_instanced(pipe,
 227                                           indexBuffer,
 228                                           indexSize,
 229                                           0,
 230                                           0xffffffff,
 231                                           mode,
 232                                           start,
 233                                           count,
 234                                           startInstance,
 235                                           instanceCount);
 236 }
 237
 238 static void
 239 softpipe_draw_range_elements_instanced(struct pipe_context *pipe,
 240                                        struct pipe_buffer *indexBuffer,
 241                                        unsigned indexSize,
 242                                        unsigned minIndex,
 243                                        unsigned maxIndex,
 244                                        unsigned mode,
 245                                        unsigned start,
 246                                        unsigned count,
 247                                        unsigned startInstance,
 248                                        unsigned instanceCount)
 249 {
 250    struct softpipe_context *sp = softpipe_context(pipe);
 251    struct draw_context *draw = sp->draw;
 252    unsigned i;
 253
 254    if (!softpipe_check_render_cond(sp))
 255       return;
 256
 257    sp->reduced_api_prim = u_reduced_prim(mode);
 258
 259    if (sp->dirty) {
 260       softpipe_update_derived(sp);
 261    }
 262
 263    softpipe_map_transfers(sp);
 264    softpipe_map_constant_buffers(sp);
 265
 266    /* Map vertex buffers */
 267    for (i = 0; i < sp->num_vertex_buffers; i++) {
 268       void *buf;
 269
 270       buf = pipe_buffer_map(pipe->screen,
 271                             sp->vertex_buffer[i].buffer,
 272                             PIPE_BUFFER_USAGE_CPU_READ);
 273       draw_set_mapped_vertex_buffer(draw, i, buf);
 274    }
 275
 276    /* Map index buffer, if present */
 277    if (indexBuffer) {
 278       void *mapped_indexes;
 279
 280       mapped_indexes = pipe_buffer_map(pipe->screen,
 281                                        indexBuffer,
 282                                        PIPE_BUFFER_USAGE_CPU_READ);
 283       draw_set_mapped_element_buffer_range(draw,
 284                                            indexSize,
 285                                            minIndex,
 286                                            maxIndex,
 287                                            mapped_indexes);
 288    } else {
 289       /* no index/element buffer */
 290       draw_set_mapped_element_buffer_range(draw,
 291                                            0,
 292                                            start,
 293                                            start + count - 1,
 294                                            NULL);
 295    }
 296
 297    /* draw! */
 298    draw_arrays_instanced(draw, mode, start, count, startInstance, instanceCount);
 299
 300    /* unmap vertex/index buffers - will cause draw module to flush */
 301    for (i = 0; i < sp->num_vertex_buffers; i++) {
 302       draw_set_mapped_vertex_buffer(draw, i, NULL);
 303       pipe_buffer_unmap(pipe->screen, sp->vertex_buffer[i].buffer);
 304    }
 305    if (indexBuffer) {
 306       draw_set_mapped_element_buffer(draw, 0, NULL);
 307       pipe_buffer_unmap(pipe->screen, indexBuffer);
 308    }
 309
 310    /* Note: leave drawing surfaces mapped */
 311    softpipe_unmap_constant_buffers(sp);
 312
 313    sp->dirty_render_cache = TRUE;
 314 }