src/gallium/drivers/llvmpipe/lp_setup.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 /**
  29  * Tiling engine.
  30  *
  31  * Builds per-tile display lists and executes them on calls to
  32  * lp_setup_flush().
  33  */
  34
  35 #include "lp_setup_context.h"
  36 #include "util/u_math.h"
  37 #include "util/u_memory.h"
  38 #include "util/u_pack_color.h"
  39 #include "pipe/p_defines.h"
  40
  41 static void set_state( struct setup_context *, unsigned );
  42
  43 void lp_setup_new_cmd_block( struct cmd_block_list *list )
  44 {
  45    struct cmd_block *block = MALLOC_STRUCT(cmd_block);
  46    list->tail->next = block;
  47    list->tail = block;
  48    block->next = NULL;
  49    block->count = 0;
  50 }
  51
  52 void lp_setup_new_data_block( struct data_block_list *list )
  53 {
  54    struct data_block *block = MALLOC_STRUCT(data_block);
  55    list->tail->next = block;
  56    list->tail = block;
  57    block->next = NULL;
  58    block->used = 0;
  59 }
  60
  61
  62 static void
  63 first_triangle( struct setup_context *setup,
  64                 const float (*v0)[4],
  65                 const float (*v1)[4],
  66                 const float (*v2)[4])
  67 {
  68    set_state( setup, SETUP_ACTIVE );
  69    lp_setup_choose_triangle( setup );
  70    setup->triangle( setup, v0, v1, v2 );
  71 }
  72
  73 static void
  74 first_line( struct setup_context *setup,
  75             const float (*v0)[4],
  76             const float (*v1)[4])
  77 {
  78    set_state( setup, SETUP_ACTIVE );
  79    lp_setup_choose_line( setup );
  80    setup->line( setup, v0, v1 );
  81 }
  82
  83 static void
  84 first_point( struct setup_context *setup,
  85              const float (*v0)[4])
  86 {
  87    set_state( setup, SETUP_ACTIVE );
  88    lp_setup_choose_point( setup );
  89    setup->point( setup, v0 );
  90 }
  91
  92 static void reset_context( struct setup_context *setup )
  93 {
  94    unsigned i, j;
  95
  96    /* Free binner command lists:
  97     */
  98    for (i = 0; i < setup->tiles_x; i++) {
  99       for (j = 0; j < setup->tiles_y; j++) {
 100          struct cmd_block_list *list = &setup->tile[i][j];
 101          struct cmd_block *block;
 102          struct cmd_block *tmp;
 103
 104          for (block = list->head; block != list->tail; block = tmp) {
 105             tmp = block->next;
 106             FREE(block);
 107          }
 108
 109          list->head = list->tail;
 110       }
 111    }
 112
 113    /* Free binned data:
 114     */
 115    {
 116       struct data_block_list *list = &setup->data;
 117       struct data_block *block, *tmp;
 118
 119       for (block = list->head; block != list->tail; block = tmp) {
 120          tmp = block->next;
 121          FREE(block);
 122       }
 123
 124       list->head = list->tail;
 125    }
 126
 127    /* Reset some state:
 128     */
 129    setup->clear.flags = 0;
 130
 131    /* Have an explicit "start-binning" call and get rid of this
 132     * pointer twiddling?
 133     */
 134    setup->line = first_line;
 135    setup->point = first_point;
 136    setup->triangle = first_triangle;
 137 }
 138
 139
 140
 141
 142 /* Add a command to all active bins.
 143  */
 144 static void bin_everywhere( struct setup_context *setup,
 145                             lp_rast_cmd cmd,
 146                             const union lp_rast_cmd_arg *arg )
 147 {
 148    unsigned i, j;
 149    for (i = 0; i < setup->tiles_x; i++)
 150       for (j = 0; j < setup->tiles_y; j++)
 151          bin_cmd( &setup->tile[i][j], cmd, arg );
 152 }
 153
 154
 155 static void
 156 rasterize_bins( struct setup_context *setup,
 157                 boolean write_depth )
 158 {
 159    struct lp_rasterizer *rast = setup->rast;
 160    struct cmd_block *block;
 161    unsigned i,j,k;
 162
 163    lp_rast_bind_color( rast,
 164                        setup->fb.cbuf,
 165                        TRUE );                    /* WRITE */
 166
 167    lp_rast_bind_depth( rast,
 168                        setup->fb.zsbuf,
 169                        write_depth );             /* WRITE */
 170
 171    for (i = 0; i < setup->tiles_x; i++) {
 172       for (j = 0; j < setup->tiles_y; j++) {
 173
 174          lp_rast_start_tile( rast,
 175                              i * TILESIZE,
 176                              j * TILESIZE );
 177
 178          for (block = setup->tile[i][j].head; block; block = block->next) {
 179             for (k = 0; k < block->count; k++) {
 180                block->cmd[k]( rast, block->arg[k] );
 181             }
 182          }
 183
 184          lp_rast_end_tile( rast );
 185       }
 186    }
 187
 188    reset_context( setup );
 189 }
 190
 191
 192
 193 static void
 194 begin_binning( struct setup_context *setup )
 195 {
 196    if (setup->fb.cbuf) {
 197       if (setup->clear.flags & PIPE_CLEAR_COLOR)
 198          bin_everywhere( setup,
 199                          lp_rast_clear_color,
 200                          &setup->clear.color );
 201       else
 202          bin_everywhere( setup,
 203                          lp_rast_load_color,
 204                          NULL );
 205    }
 206
 207    if (setup->fb.zsbuf) {
 208       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 209          bin_everywhere( setup,
 210                          lp_rast_clear_zstencil,
 211                          &setup->clear.zstencil );
 212       else
 213          bin_everywhere( setup,
 214                          lp_rast_load_zstencil,
 215                          NULL );
 216    }
 217 }
 218
 219
 220 /* This basically bins and then flushes any outstanding full-screen
 221  * clears.
 222  *
 223  * TODO: fast path for fullscreen clears and no triangles.
 224  */
 225 static void
 226 execute_clears( struct setup_context *setup )
 227 {
 228    begin_binning( setup );
 229    rasterize_bins( setup, TRUE );
 230 }
 231
 232
 233 static void
 234 set_state( struct setup_context *setup,
 235            unsigned new_state )
 236 {
 237    unsigned old_state = setup->state;
 238
 239    if (old_state == new_state)
 240       return;
 241
 242    switch (new_state) {
 243    case SETUP_ACTIVE:
 244       if (old_state == SETUP_FLUSHED)
 245          begin_binning( setup );
 246       break;
 247
 248    case SETUP_CLEARED:
 249       if (old_state == SETUP_ACTIVE) {
 250          assert(0);
 251          return;
 252       }
 253       break;
 254
 255    case SETUP_FLUSHED:
 256       if (old_state == SETUP_CLEARED)
 257          execute_clears( setup );
 258       else
 259          rasterize_bins( setup, TRUE );
 260       break;
 261    }
 262
 263    setup->state = new_state;
 264 }
 265
 266
 267 void
 268 lp_setup_flush( struct setup_context *setup,
 269                 unsigned flags )
 270 {
 271    set_state( setup, SETUP_FLUSHED );
 272 }
 273
 274
 275 void
 276 lp_setup_bind_framebuffer( struct setup_context *setup,
 277                            struct pipe_surface *color,
 278                            struct pipe_surface *zstencil )
 279 {
 280    unsigned width, height;
 281
 282    set_state( setup, SETUP_FLUSHED );
 283
 284    pipe_surface_reference( &setup->fb.cbuf, color );
 285    pipe_surface_reference( &setup->fb.zsbuf, zstencil );
 286
 287    width = MAX2( color->width, zstencil->width );
 288    height = MAX2( color->height, zstencil->height );
 289
 290    setup->tiles_x = align( width, TILESIZE ) / TILESIZE;
 291    setup->tiles_y = align( height, TILESIZE ) / TILESIZE;
 292 }
 293
 294 void
 295 lp_setup_clear( struct setup_context *setup,
 296                 const float *color,
 297                 double depth,
 298                 unsigned stencil,
 299                 unsigned flags )
 300 {
 301    if (setup->state == SETUP_ACTIVE) {
 302       /* Add the clear to existing bins.  In the unusual case where
 303        * both color and depth-stencilare being cleared, we could
 304        * discard the currently binned scene and start again, but I
 305        * don't see that as being a common usage.
 306        */
 307       if (flags & PIPE_CLEAR_COLOR) {
 308          union lp_rast_cmd_arg *arg = get_data( &setup->data, sizeof *arg );
 309
 310          util_pack_color(color,
 311                          setup->fb.cbuf->format,
 312                          &arg->clear_color );
 313
 314          bin_everywhere(setup, lp_rast_clear_color, arg );
 315       }
 316
 317       if (flags & PIPE_CLEAR_DEPTHSTENCIL) {
 318          union lp_rast_cmd_arg *arg = get_data( &setup->data, sizeof *arg );
 319
 320          arg->clear_zstencil =
 321             util_pack_z_stencil(setup->fb.zsbuf->format,
 322                                 depth,
 323                                 stencil);
 324
 325          bin_everywhere(setup, lp_rast_clear_zstencil, arg );
 326       }
 327    }
 328    else {
 329       /* Put ourselves into the 'pre-clear' state, specifically to try
 330        * and accumulate multiple clears to color and depth_stencil
 331        * buffers which the app or state-tracker might issue
 332        * separately.
 333        */
 334       set_state( setup, SETUP_CLEARED );
 335
 336       setup->clear.flags |= flags;
 337
 338       if (flags & PIPE_CLEAR_COLOR) {
 339          util_pack_color(color,
 340                          setup->fb.cbuf->format,
 341                          &setup->clear.color.clear_color );
 342       }
 343
 344       if (flags & PIPE_CLEAR_DEPTHSTENCIL) {
 345          setup->clear.zstencil.clear_zstencil =
 346             util_pack_z_stencil(setup->fb.zsbuf->format,
 347                                 depth,
 348                                 stencil);
 349       }
 350    }
 351 }
 352
 353
 354 void
 355 lp_setup_set_fs_inputs( struct setup_context *setup,
 356                         const struct lp_shader_input *input,
 357                         unsigned nr )
 358 {
 359    memcpy( setup->fs.input, input, nr * sizeof input[0] );
 360    setup->fs.nr_inputs = nr;
 361 }
 362
 363 void
 364 lp_setup_set_shader_state( struct setup_context *setup,
 365                            const struct lp_jit_context *jc )
 366 {
 367
 368 }
 369
 370
 371
 372
 373
 374 /* Stubs for lines & points for now:
 375  */
 376 void
 377 lp_setup_point(struct setup_context *setup,
 378                      const float (*v0)[4])
 379 {
 380    setup->point( setup, v0 );
 381 }
 382
 383 void
 384 lp_setup_line(struct setup_context *setup,
 385                     const float (*v0)[4],
 386                     const float (*v1)[4])
 387 {
 388    setup->line( setup, v0, v1 );
 389 }
 390
 391 void
 392 lp_setup_tri(struct setup_context *setup,
 393              const float (*v0)[4],
 394              const float (*v1)[4],
 395              const float (*v2)[4])
 396 {
 397    setup->triangle( setup, v0, v1, v2 );
 398 }
 399
 400
 401 void
 402 lp_setup_destroy( struct setup_context *setup )
 403 {
 404    lp_rast_destroy( setup->rast );
 405    FREE( setup );
 406 }
 407
 408
 409 /**
 410  * Create a new primitive tiling engine.  Currently also creates a
 411  * rasterizer to use with it.
 412  */
 413 struct setup_context *
 414 lp_setup_create( void )
 415 {
 416    struct setup_context *setup = CALLOC_STRUCT(setup_context);
 417    unsigned i, j;
 418
 419    setup->rast = lp_rast_create();
 420    if (!setup->rast)
 421       goto fail;
 422
 423    for (i = 0; i < TILES_X; i++)
 424       for (j = 0; j < TILES_Y; j++)
 425          setup->tile[i][j].head =
 426             setup->tile[i][j].tail = CALLOC_STRUCT(cmd_block);
 427
 428    return setup;
 429
 430 fail:
 431    FREE(setup);
 432    return NULL;
 433 }
 434