src/gallium/auxiliary/draw/draw_context.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   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   */
  32
  33
  34 #include "pipe/p_context.h"
  35 #include "util/u_memory.h"
  36 #include "util/u_math.h"
  37 #include "util/u_cpu_detect.h"
  38 #include "draw_context.h"
  39 #include "draw_vs.h"
  40 #include "draw_gs.h"
  41
  42 #if HAVE_LLVM
  43 #include "gallivm/lp_bld_init.h"
  44 #include "draw_llvm.h"
  45
  46 static boolean
  47 draw_get_option_use_llvm(void)
  48 {
  49    static boolean first = TRUE;
  50    static boolean value;
  51    if (first) {
  52       first = FALSE;
  53       value = debug_get_bool_option("DRAW_USE_LLVM", TRUE);
  54
  55 #ifdef PIPE_ARCH_X86
  56       util_cpu_detect();
  57       /* require SSE2 due to LLVM PR6960. */
  58       if (!util_cpu_caps.has_sse2)
  59          value = FALSE;
  60 #endif
  61    }
  62    return value;
  63 }
  64 #endif
  65
  66 struct draw_context *draw_create( struct pipe_context *pipe )
  67 {
  68    struct draw_context *draw = CALLOC_STRUCT( draw_context );
  69    if (draw == NULL)
  70       goto fail;
  71
  72 #if HAVE_LLVM
  73    if(draw_get_option_use_llvm())
  74    {
  75       lp_build_init();
  76       assert(lp_build_engine);
  77       draw->engine = lp_build_engine;
  78       draw->llvm = draw_llvm_create(draw);
  79    }
  80 #endif
  81
  82    if (!draw_init(draw))
  83       goto fail;
  84
  85    draw->pipe = pipe;
  86
  87    return draw;
  88
  89 fail:
  90    draw_destroy( draw );
  91    return NULL;
  92 }
  93
  94 boolean draw_init(struct draw_context *draw)
  95 {
  96    /*
  97     * Note that several functions compute the clipmask of the predefined
  98     * formats with hardcoded formulas instead of using these. So modifications
  99     * here must be reflected there too.
 100     */
 101
 102    ASSIGN_4V( draw->plane[0], -1,  0,  0, 1 );
 103    ASSIGN_4V( draw->plane[1],  1,  0,  0, 1 );
 104    ASSIGN_4V( draw->plane[2],  0, -1,  0, 1 );
 105    ASSIGN_4V( draw->plane[3],  0,  1,  0, 1 );
 106    ASSIGN_4V( draw->plane[4],  0,  0,  1, 1 ); /* yes these are correct */
 107    ASSIGN_4V( draw->plane[5],  0,  0, -1, 1 ); /* mesa's a bit wonky */
 108    draw->nr_planes = 6;
 109
 110
 111    draw->reduced_prim = ~0; /* != any of PIPE_PRIM_x */
 112
 113
 114    if (!draw_pipeline_init( draw ))
 115       return FALSE;
 116
 117    if (!draw_pt_init( draw ))
 118       return FALSE;
 119
 120    if (!draw_vs_init( draw ))
 121       return FALSE;
 122
 123    if (!draw_gs_init( draw ))
 124       return FALSE;
 125
 126    return TRUE;
 127 }
 128
 129
 130 void draw_destroy( struct draw_context *draw )
 131 {
 132    struct pipe_context *pipe;
 133    int i, j;
 134
 135    if (!draw)
 136       return;
 137
 138    pipe = draw->pipe;
 139
 140    /* free any rasterizer CSOs that we may have created.
 141     */
 142    for (i = 0; i < 2; i++) {
 143       for (j = 0; j < 2; j++) {
 144          if (draw->rasterizer_no_cull[i][j]) {
 145             pipe->delete_rasterizer_state(pipe, draw->rasterizer_no_cull[i][j]);
 146          }
 147       }
 148    }
 149
 150    /* Not so fast -- we're just borrowing this at the moment.
 151     *
 152    if (draw->render)
 153       draw->render->destroy( draw->render );
 154    */
 155
 156    draw_pipeline_destroy( draw );
 157    draw_pt_destroy( draw );
 158    draw_vs_destroy( draw );
 159    draw_gs_destroy( draw );
 160 #ifdef HAVE_LLVM
 161    if(draw->llvm)
 162       draw_llvm_destroy( draw->llvm );
 163 #endif
 164
 165    FREE( draw );
 166 }
 167
 168
 169
 170 void draw_flush( struct draw_context *draw )
 171 {
 172    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 173 }
 174
 175
 176 /**
 177  * Specify the Minimum Resolvable Depth factor for polygon offset.
 178  * This factor potentially depends on the number of Z buffer bits,
 179  * the rasterization algorithm and the arithmetic performed on Z
 180  * values between vertex shading and rasterization.  It will vary
 181  * from one driver to another.
 182  */
 183 void draw_set_mrd(struct draw_context *draw, double mrd)
 184 {
 185    draw->mrd = mrd;
 186 }
 187
 188
 189 /**
 190  * Register new primitive rasterization/rendering state.
 191  * This causes the drawing pipeline to be rebuilt.
 192  */
 193 void draw_set_rasterizer_state( struct draw_context *draw,
 194                                 const struct pipe_rasterizer_state *raster,
 195                                 void *rast_handle )
 196 {
 197    if (!draw->suspend_flushing) {
 198       draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 199
 200       draw->rasterizer = raster;
 201       draw->rast_handle = rast_handle;
 202
 203       draw->bypass_clipping = draw->driver.bypass_clipping;
 204    }
 205 }
 206
 207
 208 void draw_set_driver_clipping( struct draw_context *draw,
 209                                boolean bypass_clipping )
 210 {
 211    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 212
 213    draw->driver.bypass_clipping = bypass_clipping;
 214    draw->bypass_clipping = draw->driver.bypass_clipping;
 215 }
 216
 217
 218 /**
 219  * Plug in the primitive rendering/rasterization stage (which is the last
 220  * stage in the drawing pipeline).
 221  * This is provided by the device driver.
 222  */
 223 void draw_set_rasterize_stage( struct draw_context *draw,
 224                                struct draw_stage *stage )
 225 {
 226    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 227
 228    draw->pipeline.rasterize = stage;
 229 }
 230
 231
 232 /**
 233  * Set the draw module's clipping state.
 234  */
 235 void draw_set_clip_state( struct draw_context *draw,
 236                           const struct pipe_clip_state *clip )
 237 {
 238    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 239
 240    assert(clip->nr <= PIPE_MAX_CLIP_PLANES);
 241    memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0]));
 242    draw->nr_planes = 6 + clip->nr;
 243    draw->depth_clamp = clip->depth_clamp;
 244 }
 245
 246
 247 /**
 248  * Set the draw module's viewport state.
 249  */
 250 void draw_set_viewport_state( struct draw_context *draw,
 251                               const struct pipe_viewport_state *viewport )
 252 {
 253    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 254    draw->viewport = *viewport; /* struct copy */
 255    draw->identity_viewport = (viewport->scale[0] == 1.0f &&
 256                               viewport->scale[1] == 1.0f &&
 257                               viewport->scale[2] == 1.0f &&
 258                               viewport->scale[3] == 1.0f &&
 259                               viewport->translate[0] == 0.0f &&
 260                               viewport->translate[1] == 0.0f &&
 261                               viewport->translate[2] == 0.0f &&
 262                               viewport->translate[3] == 0.0f);
 263
 264    draw_vs_set_viewport( draw, viewport );
 265 }
 266
 267
 268
 269 void
 270 draw_set_vertex_buffers(struct draw_context *draw,
 271                         unsigned count,
 272                         const struct pipe_vertex_buffer *buffers)
 273 {
 274    assert(count <= PIPE_MAX_ATTRIBS);
 275
 276    memcpy(draw->pt.vertex_buffer, buffers, count * sizeof(buffers[0]));
 277    draw->pt.nr_vertex_buffers = count;
 278 }
 279
 280
 281 void
 282 draw_set_vertex_elements(struct draw_context *draw,
 283                          unsigned count,
 284                          const struct pipe_vertex_element *elements)
 285 {
 286    assert(count <= PIPE_MAX_ATTRIBS);
 287
 288    memcpy(draw->pt.vertex_element, elements, count * sizeof(elements[0]));
 289    draw->pt.nr_vertex_elements = count;
 290 }
 291
 292
 293 /**
 294  * Tell drawing context where to find mapped vertex buffers.
 295  */
 296 void
 297 draw_set_mapped_vertex_buffer(struct draw_context *draw,
 298                               unsigned attr, const void *buffer)
 299 {
 300    draw->pt.user.vbuffer[attr] = buffer;
 301 }
 302
 303
 304 void
 305 draw_set_mapped_constant_buffer(struct draw_context *draw,
 306                                 unsigned shader_type,
 307                                 unsigned slot,
 308                                 const void *buffer,
 309                                 unsigned size )
 310 {
 311    debug_assert(shader_type == PIPE_SHADER_VERTEX ||
 312                 shader_type == PIPE_SHADER_GEOMETRY);
 313    debug_assert(slot < PIPE_MAX_CONSTANT_BUFFERS);
 314
 315    switch (shader_type) {
 316    case PIPE_SHADER_VERTEX:
 317       draw->pt.user.vs_constants[slot] = buffer;
 318       draw->pt.user.vs_constants_size[slot] = size;
 319       draw_vs_set_constants(draw, slot, buffer, size);
 320       break;
 321    case PIPE_SHADER_GEOMETRY:
 322       draw->pt.user.gs_constants[slot] = buffer;
 323       draw->pt.user.gs_constants_size[slot] = size;
 324       draw_gs_set_constants(draw, slot, buffer, size);
 325       break;
 326    default:
 327       assert(0 && "invalid shader type in draw_set_mapped_constant_buffer");
 328    }
 329 }
 330
 331
 332 /**
 333  * Tells the draw module to draw points with triangles if their size
 334  * is greater than this threshold.
 335  */
 336 void
 337 draw_wide_point_threshold(struct draw_context *draw, float threshold)
 338 {
 339    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 340    draw->pipeline.wide_point_threshold = threshold;
 341 }
 342
 343
 344 /**
 345  * Should the draw module handle point->quad conversion for drawing sprites?
 346  */
 347 void
 348 draw_wide_point_sprites(struct draw_context *draw, boolean draw_sprite)
 349 {
 350    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 351    draw->pipeline.wide_point_sprites = draw_sprite;
 352 }
 353
 354
 355 /**
 356  * Tells the draw module to draw lines with triangles if their width
 357  * is greater than this threshold.
 358  */
 359 void
 360 draw_wide_line_threshold(struct draw_context *draw, float threshold)
 361 {
 362    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 363    draw->pipeline.wide_line_threshold = threshold;
 364 }
 365
 366
 367 /**
 368  * Tells the draw module whether or not to implement line stipple.
 369  */
 370 void
 371 draw_enable_line_stipple(struct draw_context *draw, boolean enable)
 372 {
 373    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 374    draw->pipeline.line_stipple = enable;
 375 }
 376
 377
 378 /**
 379  * Tells draw module whether to convert points to quads for sprite mode.
 380  */
 381 void
 382 draw_enable_point_sprites(struct draw_context *draw, boolean enable)
 383 {
 384    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 385    draw->pipeline.point_sprite = enable;
 386 }
 387
 388
 389 void
 390 draw_set_force_passthrough( struct draw_context *draw, boolean enable )
 391 {
 392    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 393    draw->force_passthrough = enable;
 394 }
 395
 396
 397 /**
 398  * Ask the draw module for the location/slot of the given vertex attribute in
 399  * a post-transformed vertex.
 400  *
 401  * With this function, drivers that use the draw module should have no reason
 402  * to track the current vertex/geometry shader.
 403  *
 404  * Note that the draw module may sometimes generate vertices with extra
 405  * attributes (such as texcoords for AA lines).  The driver can call this
 406  * function to find those attributes.
 407  *
 408  * Zero is returned if the attribute is not found since this is
 409  * a don't care / undefined situtation.  Returning -1 would be a bit more
 410  * work for the drivers.
 411  */
 412 int
 413 draw_find_shader_output(const struct draw_context *draw,
 414                         uint semantic_name, uint semantic_index)
 415 {
 416    const struct draw_vertex_shader *vs = draw->vs.vertex_shader;
 417    const struct draw_geometry_shader *gs = draw->gs.geometry_shader;
 418    uint i;
 419    const struct tgsi_shader_info *info = &vs->info;
 420
 421    if (gs)
 422       info = &gs->info;
 423
 424    for (i = 0; i < info->num_outputs; i++) {
 425       if (info->output_semantic_name[i] == semantic_name &&
 426           info->output_semantic_index[i] == semantic_index)
 427          return i;
 428    }
 429
 430    /* XXX there may be more than one extra vertex attrib.
 431     * For example, simulated gl_FragCoord and gl_PointCoord.
 432     */
 433    if (draw->extra_shader_outputs.semantic_name == semantic_name &&
 434        draw->extra_shader_outputs.semantic_index == semantic_index) {
 435       return draw->extra_shader_outputs.slot;
 436    }
 437
 438    return 0;
 439 }
 440
 441
 442 /**
 443  * Return total number of the shader outputs.  This function is similar to
 444  * draw_current_shader_outputs() but this function also counts any extra
 445  * vertex/geometry output attributes that may be filled in by some draw
 446  * stages (such as AA point, AA line).
 447  *
 448  * If geometry shader is present, its output will be returned,
 449  * if not vertex shader is used.
 450  */
 451 uint
 452 draw_num_shader_outputs(const struct draw_context *draw)
 453 {
 454    uint count = draw->vs.vertex_shader->info.num_outputs;
 455
 456    /* If a geometry shader is present, its outputs go to the
 457     * driver, else the vertex shader's outputs.
 458     */
 459    if (draw->gs.geometry_shader)
 460       count = draw->gs.geometry_shader->info.num_outputs;
 461
 462    if (draw->extra_shader_outputs.slot > 0)
 463       count++;
 464    return count;
 465 }
 466
 467
 468 /**
 469  * Provide TGSI sampler objects for vertex/geometry shaders that use
 470  * texture fetches.
 471  * This might only be used by software drivers for the time being.
 472  */
 473 void
 474 draw_texture_samplers(struct draw_context *draw,
 475                       uint shader,
 476                       uint num_samplers,
 477                       struct tgsi_sampler **samplers)
 478 {
 479    if (shader == PIPE_SHADER_VERTEX) {
 480       draw->vs.num_samplers = num_samplers;
 481       draw->vs.samplers = samplers;
 482    } else {
 483       debug_assert(shader == PIPE_SHADER_GEOMETRY);
 484       draw->gs.num_samplers = num_samplers;
 485       draw->gs.samplers = samplers;
 486    }
 487 }
 488
 489
 490
 491
 492 void draw_set_render( struct draw_context *draw,
 493                       struct vbuf_render *render )
 494 {
 495    draw->render = render;
 496 }
 497
 498
 499 void
 500 draw_set_index_buffer(struct draw_context *draw,
 501                       const struct pipe_index_buffer *ib)
 502 {
 503    if (ib)
 504       memcpy(&draw->pt.index_buffer, ib, sizeof(draw->pt.index_buffer));
 505    else
 506       memset(&draw->pt.index_buffer, 0, sizeof(draw->pt.index_buffer));
 507 }
 508
 509
 510 /**
 511  * Tell drawing context where to find mapped index/element buffer.
 512  */
 513 void
 514 draw_set_mapped_index_buffer(struct draw_context *draw,
 515                              const void *elements)
 516 {
 517     draw->pt.user.elts = elements;
 518 }
 519
 520
 521 /* Revamp me please:
 522  */
 523 void draw_do_flush( struct draw_context *draw, unsigned flags )
 524 {
 525    if (!draw->suspend_flushing)
 526    {
 527       assert(!draw->flushing); /* catch inadvertant recursion */
 528
 529       draw->flushing = TRUE;
 530
 531       draw_pipeline_flush( draw, flags );
 532
 533       draw->reduced_prim = ~0; /* is reduced_prim needed any more? */
 534
 535       draw->flushing = FALSE;
 536    }
 537 }
 538
 539
 540 /**
 541  * Return the number of output attributes produced by the geometry
 542  * shader, if present.  If no geometry shader, return the number of
 543  * outputs from the vertex shader.
 544  * \sa draw_num_shader_outputs
 545  */
 546 uint
 547 draw_current_shader_outputs(const struct draw_context *draw)
 548 {
 549    if (draw->gs.geometry_shader)
 550       return draw->gs.num_gs_outputs;
 551    return draw->vs.num_vs_outputs;
 552 }
 553
 554
 555 /**
 556  * Return the index of the shader output which will contain the
 557  * vertex position.
 558  */
 559 uint
 560 draw_current_shader_position_output(const struct draw_context *draw)
 561 {
 562    if (draw->gs.geometry_shader)
 563       return draw->gs.position_output;
 564    return draw->vs.position_output;
 565 }
 566
 567
 568 /**
 569  * Return a pointer/handle for a driver/CSO rasterizer object which
 570  * disabled culling, stippling, unfilled tris, etc.
 571  * This is used by some pipeline stages (such as wide_point, aa_line
 572  * and aa_point) which convert points/lines into triangles.  In those
 573  * cases we don't want to accidentally cull the triangles.
 574  *
 575  * \param scissor  should the rasterizer state enable scissoring?
 576  * \param flatshade  should the rasterizer state use flat shading?
 577  * \return  rasterizer CSO handle
 578  */
 579 void *
 580 draw_get_rasterizer_no_cull( struct draw_context *draw,
 581                              boolean scissor,
 582                              boolean flatshade )
 583 {
 584    if (!draw->rasterizer_no_cull[scissor][flatshade]) {
 585       /* create now */
 586       struct pipe_context *pipe = draw->pipe;
 587       struct pipe_rasterizer_state rast;
 588
 589       memset(&rast, 0, sizeof(rast));
 590       rast.scissor = scissor;
 591       rast.flatshade = flatshade;
 592       rast.front_ccw = 1;
 593       rast.gl_rasterization_rules = draw->rasterizer->gl_rasterization_rules;
 594
 595       draw->rasterizer_no_cull[scissor][flatshade] =
 596          pipe->create_rasterizer_state(pipe, &rast);
 597    }
 598    return draw->rasterizer_no_cull[scissor][flatshade];
 599 }
 600
 601 void
 602 draw_set_mapped_so_buffers(struct draw_context *draw,
 603                            void *buffers[PIPE_MAX_SO_BUFFERS],
 604                            unsigned num_buffers)
 605 {
 606    int i;
 607
 608    for (i = 0; i < num_buffers; ++i) {
 609       draw->so.buffers[i] = buffers[i];
 610    }
 611    draw->so.num_buffers = num_buffers;
 612 }
 613
 614 void
 615 draw_set_so_state(struct draw_context *draw,
 616                   struct pipe_stream_output_state *state)
 617 {
 618    memcpy(&draw->so.state,
 619           state,
 620           sizeof(struct pipe_stream_output_state));
 621 }
 622
 623 void
 624 draw_set_sampler_views(struct draw_context *draw,
 625                        struct pipe_sampler_view **views,
 626                        unsigned num)
 627 {
 628    unsigned i;
 629
 630    debug_assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 631
 632    for (i = 0; i < num; ++i)
 633       draw->sampler_views[i] = views[i];
 634    for (i = num; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 635       draw->sampler_views[i] = NULL;
 636
 637    draw->num_sampler_views = num;
 638 }
 639
 640 void
 641 draw_set_samplers(struct draw_context *draw,
 642                   struct pipe_sampler_state **samplers,
 643                   unsigned num)
 644 {
 645    unsigned i;
 646
 647    debug_assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 648
 649    for (i = 0; i < num; ++i)
 650       draw->samplers[i] = samplers[i];
 651    for (i = num; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 652       draw->samplers[i] = NULL;
 653
 654    draw->num_samplers = num;
 655 }
 656
 657 void
 658 draw_set_mapped_texture(struct draw_context *draw,
 659                         unsigned sampler_idx,
 660                         uint32_t width, uint32_t height, uint32_t depth,
 661                         uint32_t last_level,
 662                         uint32_t row_stride[DRAW_MAX_TEXTURE_LEVELS],
 663                         uint32_t img_stride[DRAW_MAX_TEXTURE_LEVELS],
 664                         const void *data[DRAW_MAX_TEXTURE_LEVELS])
 665 {
 666 #ifdef HAVE_LLVM
 667    if(draw->llvm)
 668       draw_llvm_set_mapped_texture(draw,
 669                                 sampler_idx,
 670                                 width, height, depth, last_level,
 671                                 row_stride, img_stride, data);
 672 #endif
 673 }