src/gallium/drivers/softpipe/sp_state_derived.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 VMware, Inc.
   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
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  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 VMWARE 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 #include "util/u_inlines.h"
  29 #include "util/u_math.h"
  30 #include "util/u_memory.h"
  31 #include "util/u_pstipple.h"
  32 #include "pipe/p_shader_tokens.h"
  33 #include "draw/draw_context.h"
  34 #include "draw/draw_vertex.h"
  35 #include "sp_context.h"
  36 #include "sp_screen.h"
  37 #include "sp_state.h"
  38 #include "sp_texture.h"
  39 #include "sp_tex_sample.h"
  40 #include "sp_tex_tile_cache.h"
  41
  42
  43 /**
  44  * Mark the current vertex layout as "invalid".
  45  * We'll validate the vertex layout later, when we start to actually
  46  * render a point or line or tri.
  47  */
  48 static void
  49 invalidate_vertex_layout(struct softpipe_context *softpipe)
  50 {
  51    softpipe->setup_info.valid =  0;
  52 }
  53
  54
  55 /**
  56  * The vertex info describes how to convert the post-transformed vertices
  57  * (simple float[][4]) used by the 'draw' module into vertices for
  58  * rasterization.
  59  *
  60  * This function validates the vertex layout.
  61  */
  62 static void
  63 softpipe_compute_vertex_info(struct softpipe_context *softpipe)
  64 {
  65    struct sp_setup_info *sinfo = &softpipe->setup_info;
  66
  67    if (sinfo->valid == 0) {
  68       const struct tgsi_shader_info *fsInfo = &softpipe->fs_variant->info;
  69       struct vertex_info *vinfo = &softpipe->vertex_info;
  70       uint i;
  71       int vs_index;
  72       /*
  73        * This doesn't quite work right (wrt face injection, prim id,
  74        * wide points) - hit a couple assertions, misrenderings plus
  75        * memory corruption. Albeit could fix (the former two) by calling
  76        * this "more often" (rasterizer changes etc.). (The latter would
  77        * need to be included in draw_prepare_shader_outputs, but it looks
  78        * like that would potentially allocate quite some unused additional
  79        * vertex outputs.)
  80        * draw_prepare_shader_outputs(softpipe->draw);
  81        */
  82
  83       /*
  84        * Those can't actually be 0 (because pos is always at 0).
  85        * But use ints anyway to avoid confusion (in vs outputs, they
  86        * can very well be at pos 0).
  87        */
  88       softpipe->viewport_index_slot = -1;
  89       softpipe->layer_slot = -1;
  90       softpipe->psize_slot = -1;
  91
  92       vinfo->num_attribs = 0;
  93
  94       /*
  95        * Put position always first (setup needs it there).
  96        */
  97       vs_index = draw_find_shader_output(softpipe->draw,
  98                                          TGSI_SEMANTIC_POSITION, 0);
  99
 100       draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
 101
 102       /*
 103        * Match FS inputs against VS outputs, emitting the necessary
 104        * attributes.
 105        */
 106       for (i = 0; i < fsInfo->num_inputs; i++) {
 107          enum sp_interp_mode interp = SP_INTERP_LINEAR;
 108
 109          switch (fsInfo->input_interpolate[i]) {
 110          case TGSI_INTERPOLATE_CONSTANT:
 111             interp = SP_INTERP_CONSTANT;
 112             break;
 113          case TGSI_INTERPOLATE_LINEAR:
 114             interp = SP_INTERP_LINEAR;
 115             break;
 116          case TGSI_INTERPOLATE_PERSPECTIVE:
 117             interp = SP_INTERP_PERSPECTIVE;
 118             break;
 119          case TGSI_INTERPOLATE_COLOR:
 120             assert(fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR);
 121             break;
 122          default:
 123             assert(0);
 124          }
 125
 126          switch (fsInfo->input_semantic_name[i]) {
 127          case TGSI_SEMANTIC_POSITION:
 128             interp = SP_INTERP_POS;
 129             break;
 130
 131          case TGSI_SEMANTIC_COLOR:
 132             if (fsInfo->input_interpolate[i] == TGSI_INTERPOLATE_COLOR) {
 133                if (softpipe->rasterizer->flatshade)
 134                   interp = SP_INTERP_CONSTANT;
 135                else
 136                   interp = SP_INTERP_PERSPECTIVE;
 137             }
 138             break;
 139          }
 140
 141          /*
 142           * Search for each input in current vs output:
 143           */
 144          vs_index = draw_find_shader_output(softpipe->draw,
 145                                             fsInfo->input_semantic_name[i],
 146                                             fsInfo->input_semantic_index[i]);
 147
 148          if (fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR &&
 149              vs_index == -1) {
 150             /*
 151              * try and find a bcolor.
 152              * Note that if there's both front and back color, draw will
 153              * have copied back to front color already.
 154              */
 155             vs_index = draw_find_shader_output(softpipe->draw,
 156                                                TGSI_SEMANTIC_BCOLOR,
 157                                                fsInfo->input_semantic_index[i]);
 158          }
 159
 160          sinfo->attrib[i].interp = interp;
 161          /* extremely pointless index map */
 162          sinfo->attrib[i].src_index = i + 1;
 163          /*
 164           * For vp index and layer, if the fs requires them but the vs doesn't
 165           * provide them, draw (vbuf) will give us the required 0 (slot -1).
 166           * (This means in this case we'll also use those slots in setup, which
 167           * isn't necessary but they'll contain the correct (0) value.)
 168           */
 169          if (fsInfo->input_semantic_name[i] ==
 170                     TGSI_SEMANTIC_VIEWPORT_INDEX) {
 171             softpipe->viewport_index_slot = (int)vinfo->num_attribs;
 172             draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
 173          } else if (fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_LAYER) {
 174             softpipe->layer_slot = (int)vinfo->num_attribs;
 175             draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
 176             /*
 177              * Note that we'd actually want to skip position (as we won't use
 178              * the attribute in the fs) but can't. The reason is that we don't
 179              * actually have a input/output map for setup (even though it looks
 180              * like we do...). Could adjust for this though even without a map.
 181              */
 182          } else {
 183             /*
 184              * Note that we'd actually want to skip position (as we won't use
 185              * the attribute in the fs) but can't. The reason is that we don't
 186              * actually have a input/output map for setup (even though it looks
 187              * like we do...). Could adjust for this though even without a map.
 188              */
 189             draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
 190          }
 191       }
 192
 193       /* Figure out if we need pointsize as well.
 194        */
 195       vs_index = draw_find_shader_output(softpipe->draw,
 196                                          TGSI_SEMANTIC_PSIZE, 0);
 197
 198       if (vs_index >= 0) {
 199          softpipe->psize_slot = (int)vinfo->num_attribs;
 200          draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
 201       }
 202
 203       /* Figure out if we need viewport index (if it wasn't already in fs input) */
 204       if (softpipe->viewport_index_slot < 0) {
 205          vs_index = draw_find_shader_output(softpipe->draw,
 206                                             TGSI_SEMANTIC_VIEWPORT_INDEX,
 207                                             0);
 208          if (vs_index >= 0) {
 209             softpipe->viewport_index_slot =(int)vinfo->num_attribs;
 210             draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
 211          }
 212       }
 213
 214       /* Figure out if we need layer (if it wasn't already in fs input) */
 215       if (softpipe->layer_slot < 0) {
 216          vs_index = draw_find_shader_output(softpipe->draw,
 217                                             TGSI_SEMANTIC_LAYER,
 218                                             0);
 219          if (vs_index >= 0) {
 220             softpipe->layer_slot = (int)vinfo->num_attribs;
 221             draw_emit_vertex_attr(vinfo, EMIT_4F, vs_index);
 222          }
 223       }
 224
 225       draw_compute_vertex_size(vinfo);
 226       softpipe->setup_info.valid = 1;
 227    }
 228    return;
 229 }
 230
 231
 232 /**
 233  * Called from vbuf module.
 234  *
 235  * This will trigger validation of the vertex layout (and also compute
 236  * the required information for setup).
 237  */
 238 struct vertex_info *
 239 softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe)
 240 {
 241    softpipe_compute_vertex_info(softpipe);
 242    return &softpipe->vertex_info;
 243 }
 244
 245
 246 /**
 247  * Recompute cliprect from scissor bounds, scissor enable and surface size.
 248  */
 249 static void
 250 compute_cliprect(struct softpipe_context *sp)
 251 {
 252    unsigned i;
 253    /* SP_NEW_FRAMEBUFFER
 254     */
 255    uint surfWidth = sp->framebuffer.width;
 256    uint surfHeight = sp->framebuffer.height;
 257
 258    for (i = 0; i < PIPE_MAX_VIEWPORTS; i++) {
 259       /* SP_NEW_RASTERIZER
 260        */
 261       if (sp->rasterizer->scissor) {
 262
 263          /* SP_NEW_SCISSOR
 264           *
 265           * clip to scissor rect:
 266           */
 267          sp->cliprect[i].minx = MAX2(sp->scissors[i].minx, 0);
 268          sp->cliprect[i].miny = MAX2(sp->scissors[i].miny, 0);
 269          sp->cliprect[i].maxx = MIN2(sp->scissors[i].maxx, surfWidth);
 270          sp->cliprect[i].maxy = MIN2(sp->scissors[i].maxy, surfHeight);
 271       }
 272       else {
 273          /* clip to surface bounds */
 274          sp->cliprect[i].minx = 0;
 275          sp->cliprect[i].miny = 0;
 276          sp->cliprect[i].maxx = surfWidth;
 277          sp->cliprect[i].maxy = surfHeight;
 278       }
 279    }
 280 }
 281
 282
 283 static void
 284 set_shader_sampler(struct softpipe_context *softpipe,
 285                    unsigned shader,
 286                    int max_sampler)
 287 {
 288    int i;
 289    for (i = 0; i <= max_sampler; i++) {
 290       softpipe->tgsi.sampler[shader]->sp_sampler[i] =
 291          (struct sp_sampler *)(softpipe->samplers[shader][i]);
 292    }
 293 }
 294
 295 static void
 296 update_tgsi_samplers( struct softpipe_context *softpipe )
 297 {
 298    unsigned i, sh;
 299
 300    set_shader_sampler(softpipe, PIPE_SHADER_VERTEX,
 301                       softpipe->vs->max_sampler);
 302    set_shader_sampler(softpipe, PIPE_SHADER_FRAGMENT,
 303                       softpipe->fs_variant->info.file_max[TGSI_FILE_SAMPLER]);
 304    if (softpipe->gs) {
 305       set_shader_sampler(softpipe, PIPE_SHADER_GEOMETRY,
 306                          softpipe->gs->max_sampler);
 307    }
 308
 309    /* XXX is this really necessary here??? */
 310    for (sh = 0; sh < Elements(softpipe->tex_cache); sh++) {
 311       for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 312          struct softpipe_tex_tile_cache *tc = softpipe->tex_cache[sh][i];
 313          if (tc && tc->texture) {
 314             struct softpipe_resource *spt = softpipe_resource(tc->texture);
 315             if (spt->timestamp != tc->timestamp) {
 316                sp_tex_tile_cache_validate_texture( tc );
 317                /*
 318                  _debug_printf("INV %d %d\n", tc->timestamp, spt->timestamp);
 319                */
 320                tc->timestamp = spt->timestamp;
 321             }
 322          }
 323       }
 324    }
 325 }
 326
 327
 328 static void
 329 update_fragment_shader(struct softpipe_context *softpipe, unsigned prim)
 330 {
 331    struct sp_fragment_shader_variant_key key;
 332
 333    memset(&key, 0, sizeof(key));
 334
 335    if (prim == PIPE_PRIM_TRIANGLES)
 336       key.polygon_stipple = softpipe->rasterizer->poly_stipple_enable;
 337
 338    if (softpipe->fs) {
 339       softpipe->fs_variant = softpipe_find_fs_variant(softpipe,
 340                                                       softpipe->fs, &key);
 341
 342       /* prepare the TGSI interpreter for FS execution */
 343       softpipe->fs_variant->prepare(softpipe->fs_variant,
 344                                     softpipe->fs_machine,
 345                                     (struct tgsi_sampler *) softpipe->
 346                                     tgsi.sampler[PIPE_SHADER_FRAGMENT],
 347                                     (struct tgsi_image *)softpipe->tgsi.image[PIPE_SHADER_FRAGMENT],
 348                                     (struct tgsi_buffer *)softpipe->tgsi.buffer[PIPE_SHADER_FRAGMENT]);
 349    }
 350    else {
 351       softpipe->fs_variant = NULL;
 352    }
 353
 354    /* This would be the logical place to pass the fragment shader
 355     * to the draw module.  However, doing this here, during state
 356     * validation, causes problems with the 'draw' module helpers for
 357     * wide/AA/stippled lines.
 358     * In principle, the draw's fragment shader should be per-variant
 359     * but that doesn't work.  So we use a single draw fragment shader
 360     * per fragment shader, not per variant.
 361     */
 362 #if 0
 363    if (softpipe->fs_variant) {
 364       draw_bind_fragment_shader(softpipe->draw,
 365                                 softpipe->fs_variant->draw_shader);
 366    }
 367    else {
 368       draw_bind_fragment_shader(softpipe->draw, NULL);
 369    }
 370 #endif
 371 }
 372
 373
 374 /**
 375  * This should be called when the polygon stipple pattern changes.
 376  * We create a new texture from the stipple pattern and create a new
 377  * sampler view.
 378  */
 379 static void
 380 update_polygon_stipple_pattern(struct softpipe_context *softpipe)
 381 {
 382    struct pipe_resource *tex;
 383    struct pipe_sampler_view *view;
 384
 385    tex = util_pstipple_create_stipple_texture(&softpipe->pipe,
 386                                               softpipe->poly_stipple.stipple);
 387    pipe_resource_reference(&softpipe->pstipple.texture, tex);
 388    pipe_resource_reference(&tex, NULL);
 389
 390    view = util_pstipple_create_sampler_view(&softpipe->pipe,
 391                                             softpipe->pstipple.texture);
 392    pipe_sampler_view_reference(&softpipe->pstipple.sampler_view, view);
 393    pipe_sampler_view_reference(&view, NULL);
 394 }
 395
 396
 397 /**
 398  * Should be called when polygon stipple is enabled/disabled or when
 399  * the fragment shader changes.
 400  * We add/update the fragment sampler and sampler views to sample from
 401  * the polygon stipple texture.  The texture unit that we use depends on
 402  * the fragment shader (we need to use a unit not otherwise used by the
 403  * shader).
 404  */
 405 static void
 406 update_polygon_stipple_enable(struct softpipe_context *softpipe, unsigned prim)
 407 {
 408    if (prim == PIPE_PRIM_TRIANGLES &&
 409        softpipe->fs_variant->key.polygon_stipple) {
 410       const unsigned unit = softpipe->fs_variant->stipple_sampler_unit;
 411
 412       /* sampler state */
 413       softpipe->samplers[PIPE_SHADER_FRAGMENT][unit] = softpipe->pstipple.sampler;
 414
 415       /* sampler view state */
 416       softpipe_set_sampler_views(&softpipe->pipe, PIPE_SHADER_FRAGMENT,
 417                                  unit, 1, &softpipe->pstipple.sampler_view);
 418
 419       softpipe->dirty |= SP_NEW_SAMPLER;
 420    }
 421 }
 422
 423
 424 /* Hopefully this will remain quite simple, otherwise need to pull in
 425  * something like the state tracker mechanism.
 426  */
 427 void
 428 softpipe_update_derived(struct softpipe_context *softpipe, unsigned prim)
 429 {
 430    struct softpipe_screen *sp_screen = softpipe_screen(softpipe->pipe.screen);
 431
 432    /* Check for updated textures.
 433     */
 434    if (softpipe->tex_timestamp != sp_screen->timestamp) {
 435       softpipe->tex_timestamp = sp_screen->timestamp;
 436       softpipe->dirty |= SP_NEW_TEXTURE;
 437    }
 438
 439 #if DO_PSTIPPLE_IN_HELPER_MODULE
 440    if (softpipe->dirty & SP_NEW_STIPPLE)
 441       /* before updating samplers! */
 442       update_polygon_stipple_pattern(softpipe);
 443 #endif
 444
 445    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 446                           SP_NEW_FS))
 447       update_fragment_shader(softpipe, prim);
 448
 449 #if DO_PSTIPPLE_IN_HELPER_MODULE
 450    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 451                           SP_NEW_STIPPLE |
 452                           SP_NEW_FS))
 453       update_polygon_stipple_enable(softpipe, prim);
 454 #endif
 455
 456    /* TODO: this looks suboptimal */
 457    if (softpipe->dirty & (SP_NEW_SAMPLER |
 458                           SP_NEW_TEXTURE |
 459                           SP_NEW_FS |
 460                           SP_NEW_VS))
 461       update_tgsi_samplers( softpipe );
 462
 463    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 464                           SP_NEW_FS |
 465                           SP_NEW_VS))
 466       invalidate_vertex_layout( softpipe );
 467
 468    if (softpipe->dirty & (SP_NEW_SCISSOR |
 469                           SP_NEW_RASTERIZER |
 470                           SP_NEW_FRAMEBUFFER))
 471       compute_cliprect(softpipe);
 472
 473    if (softpipe->dirty & (SP_NEW_BLEND |
 474                           SP_NEW_DEPTH_STENCIL_ALPHA |
 475                           SP_NEW_FRAMEBUFFER |
 476                           SP_NEW_STIPPLE |
 477                           SP_NEW_FS))
 478       sp_build_quad_pipeline(softpipe);
 479
 480    softpipe->dirty = 0;
 481 }