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
   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 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    int vs_index;
  67
  68    if (sinfo->valid == 0) {
  69       /* compute vertex layout for vbuf now */
  70       const struct tgsi_shader_info *fsInfo = &softpipe->fs_variant->info;
  71       struct vertex_info *vinfo_vbuf = &softpipe->vertex_info_vbuf;
  72       const uint num = draw_num_shader_outputs(softpipe->draw);
  73       uint i;
  74
  75       /* Tell draw_vbuf to simply emit the whole post-xform vertex
  76        * as-is.  No longer any need to try and emit draw vertex_header
  77        * info.
  78        */
  79       vinfo_vbuf->num_attribs = 0;
  80       for (i = 0; i < num; i++) {
  81          draw_emit_vertex_attr(vinfo_vbuf, EMIT_4F, i);
  82       }
  83       draw_compute_vertex_size(vinfo_vbuf);
  84
  85       softpipe->viewport_index_slot = 0;
  86       softpipe->layer_slot = 0;
  87       softpipe->psize_slot = 0;
  88
  89       /*
  90        * Loop over fragment shader inputs, searching for the matching output
  91        * from the vertex shader.
  92        */
  93       for (i = 0; i < fsInfo->num_inputs; i++) {
  94          int src;
  95          enum sp_interp_mode interp = SP_INTERP_LINEAR;
  96
  97          switch (fsInfo->input_interpolate[i]) {
  98          case TGSI_INTERPOLATE_CONSTANT:
  99             interp = SP_INTERP_CONSTANT;
 100             break;
 101          case TGSI_INTERPOLATE_LINEAR:
 102             interp = SP_INTERP_LINEAR;
 103             break;
 104          case TGSI_INTERPOLATE_PERSPECTIVE:
 105             interp = SP_INTERP_PERSPECTIVE;
 106             break;
 107          case TGSI_INTERPOLATE_COLOR:
 108             assert(fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR);
 109             break;
 110          default:
 111             assert(0);
 112          }
 113
 114          switch (fsInfo->input_semantic_name[i]) {
 115          case TGSI_SEMANTIC_POSITION:
 116             interp = SP_INTERP_POS;
 117             break;
 118
 119          case TGSI_SEMANTIC_COLOR:
 120             if (fsInfo->input_interpolate[i] == TGSI_INTERPOLATE_COLOR) {
 121                if (softpipe->rasterizer->flatshade)
 122                   interp = SP_INTERP_CONSTANT;
 123                else
 124                   interp = SP_INTERP_PERSPECTIVE;
 125             }
 126             break;
 127          }
 128
 129          /* this includes texcoords and varying vars */
 130          src = draw_find_shader_output(softpipe->draw,
 131                                        fsInfo->input_semantic_name[i],
 132                                        fsInfo->input_semantic_index[i]);
 133          if (fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR && src == -1)
 134             /*
 135              * try and find a bcolor.
 136              * Note that if there's both front and back color, draw will
 137              * have copied back to front color already.
 138              */
 139             src = draw_find_shader_output(softpipe->draw,
 140                                           TGSI_SEMANTIC_BCOLOR,
 141                                           fsInfo->input_semantic_index[i]);
 142
 143          sinfo->attrib[i].interp = interp;
 144          /*
 145           * note src can be -1 if not found. Would need special handling,
 146           * (as we don't tell draw anything about it) just force to 0.
 147           * It's wrong either way but should be safer...
 148           */
 149          if (src < 0)
 150             src = 0;
 151          sinfo->attrib[i].src_index = src;
 152       }
 153
 154       /* Figure out if we need pointsize as well. */
 155       vs_index = draw_find_shader_output(softpipe->draw,
 156                                          TGSI_SEMANTIC_PSIZE, 0);
 157
 158       if (vs_index >= 0) {
 159          softpipe->psize_slot = vs_index;
 160       }
 161
 162       /* Figure out if we need viewport index */
 163       vs_index = draw_find_shader_output(softpipe->draw,
 164                                          TGSI_SEMANTIC_VIEWPORT_INDEX,
 165                                          0);
 166       if (vs_index >= 0) {
 167          softpipe->viewport_index_slot = vs_index;
 168       }
 169
 170       /* Figure out if we need layer */
 171       vs_index = draw_find_shader_output(softpipe->draw,
 172                                          TGSI_SEMANTIC_LAYER,
 173                                          0);
 174       if (vs_index >= 0) {
 175          softpipe->layer_slot = vs_index;
 176       }
 177       softpipe->setup_info.valid = 1;
 178    }
 179
 180    return;
 181 }
 182
 183
 184 /**
 185  * Called from vbuf module.
 186  *
 187  * Note the vertex layout used for vbuf is simply telling it to pass
 188  * through everything as is. The mapping actually used for setup is
 189  * stored separately (but calculated here too at the same time).
 190  */
 191 struct vertex_info *
 192 softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe)
 193 {
 194    softpipe_compute_vertex_info(softpipe);
 195    return &softpipe->vertex_info_vbuf;
 196 }
 197
 198
 199 /**
 200  * Recompute cliprect from scissor bounds, scissor enable and surface size.
 201  */
 202 static void
 203 compute_cliprect(struct softpipe_context *sp)
 204 {
 205    unsigned i;
 206    /* SP_NEW_FRAMEBUFFER
 207     */
 208    uint surfWidth = sp->framebuffer.width;
 209    uint surfHeight = sp->framebuffer.height;
 210
 211    for (i = 0; i < PIPE_MAX_VIEWPORTS; i++) {
 212       /* SP_NEW_RASTERIZER
 213        */
 214       if (sp->rasterizer->scissor) {
 215
 216          /* SP_NEW_SCISSOR
 217           *
 218           * clip to scissor rect:
 219           */
 220          sp->cliprect[i].minx = MAX2(sp->scissors[i].minx, 0);
 221          sp->cliprect[i].miny = MAX2(sp->scissors[i].miny, 0);
 222          sp->cliprect[i].maxx = MIN2(sp->scissors[i].maxx, surfWidth);
 223          sp->cliprect[i].maxy = MIN2(sp->scissors[i].maxy, surfHeight);
 224       }
 225       else {
 226          /* clip to surface bounds */
 227          sp->cliprect[i].minx = 0;
 228          sp->cliprect[i].miny = 0;
 229          sp->cliprect[i].maxx = surfWidth;
 230          sp->cliprect[i].maxy = surfHeight;
 231       }
 232    }
 233 }
 234
 235
 236 static void
 237 set_shader_sampler(struct softpipe_context *softpipe,
 238                    unsigned shader,
 239                    int max_sampler)
 240 {
 241    int i;
 242    for (i = 0; i <= max_sampler; i++) {
 243       softpipe->tgsi.sampler[shader]->sp_sampler[i] =
 244          (struct sp_sampler *)(softpipe->samplers[shader][i]);
 245    }
 246 }
 247
 248 static void
 249 update_tgsi_samplers( struct softpipe_context *softpipe )
 250 {
 251    unsigned i, sh;
 252
 253    set_shader_sampler(softpipe, PIPE_SHADER_VERTEX,
 254                       softpipe->vs->max_sampler);
 255    set_shader_sampler(softpipe, PIPE_SHADER_FRAGMENT,
 256                       softpipe->fs_variant->info.file_max[TGSI_FILE_SAMPLER]);
 257    if (softpipe->gs) {
 258       set_shader_sampler(softpipe, PIPE_SHADER_GEOMETRY,
 259                          softpipe->gs->max_sampler);
 260    }
 261
 262    /* XXX is this really necessary here??? */
 263    for (sh = 0; sh < Elements(softpipe->tex_cache); sh++) {
 264       for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 265          struct softpipe_tex_tile_cache *tc = softpipe->tex_cache[sh][i];
 266          if (tc && tc->texture) {
 267             struct softpipe_resource *spt = softpipe_resource(tc->texture);
 268             if (spt->timestamp != tc->timestamp) {
 269                sp_tex_tile_cache_validate_texture( tc );
 270                /*
 271                  _debug_printf("INV %d %d\n", tc->timestamp, spt->timestamp);
 272                */
 273                tc->timestamp = spt->timestamp;
 274             }
 275          }
 276       }
 277    }
 278 }
 279
 280
 281 static void
 282 update_fragment_shader(struct softpipe_context *softpipe, unsigned prim)
 283 {
 284    struct sp_fragment_shader_variant_key key;
 285
 286    memset(&key, 0, sizeof(key));
 287
 288    if (prim == PIPE_PRIM_TRIANGLES)
 289       key.polygon_stipple = softpipe->rasterizer->poly_stipple_enable;
 290
 291    if (softpipe->fs) {
 292       softpipe->fs_variant = softpipe_find_fs_variant(softpipe,
 293                                                       softpipe->fs, &key);
 294
 295       /* prepare the TGSI interpreter for FS execution */
 296       softpipe->fs_variant->prepare(softpipe->fs_variant,
 297                                     softpipe->fs_machine,
 298                                     (struct tgsi_sampler *) softpipe->
 299                                     tgsi.sampler[PIPE_SHADER_FRAGMENT]);
 300    }
 301    else {
 302       softpipe->fs_variant = NULL;
 303    }
 304
 305    /* This would be the logical place to pass the fragment shader
 306     * to the draw module.  However, doing this here, during state
 307     * validation, causes problems with the 'draw' module helpers for
 308     * wide/AA/stippled lines.
 309     * In principle, the draw's fragment shader should be per-variant
 310     * but that doesn't work.  So we use a single draw fragment shader
 311     * per fragment shader, not per variant.
 312     */
 313 #if 0
 314    if (softpipe->fs_variant) {
 315       draw_bind_fragment_shader(softpipe->draw,
 316                                 softpipe->fs_variant->draw_shader);
 317    }
 318    else {
 319       draw_bind_fragment_shader(softpipe->draw, NULL);
 320    }
 321 #endif
 322 }
 323
 324
 325 /**
 326  * This should be called when the polygon stipple pattern changes.
 327  * We create a new texture from the stipple pattern and create a new
 328  * sampler view.
 329  */
 330 static void
 331 update_polygon_stipple_pattern(struct softpipe_context *softpipe)
 332 {
 333    struct pipe_resource *tex;
 334    struct pipe_sampler_view *view;
 335
 336    tex = util_pstipple_create_stipple_texture(&softpipe->pipe,
 337                                               softpipe->poly_stipple.stipple);
 338    pipe_resource_reference(&softpipe->pstipple.texture, tex);
 339    pipe_resource_reference(&tex, NULL);
 340
 341    view = util_pstipple_create_sampler_view(&softpipe->pipe,
 342                                             softpipe->pstipple.texture);
 343    pipe_sampler_view_reference(&softpipe->pstipple.sampler_view, view);
 344    pipe_sampler_view_reference(&view, NULL);
 345 }
 346
 347
 348 /**
 349  * Should be called when polygon stipple is enabled/disabled or when
 350  * the fragment shader changes.
 351  * We add/update the fragment sampler and sampler views to sample from
 352  * the polygon stipple texture.  The texture unit that we use depends on
 353  * the fragment shader (we need to use a unit not otherwise used by the
 354  * shader).
 355  */
 356 static void
 357 update_polygon_stipple_enable(struct softpipe_context *softpipe, unsigned prim)
 358 {
 359    if (prim == PIPE_PRIM_TRIANGLES &&
 360        softpipe->fs_variant->key.polygon_stipple) {
 361       const unsigned unit = softpipe->fs_variant->stipple_sampler_unit;
 362
 363       /* sampler state */
 364       softpipe->samplers[PIPE_SHADER_FRAGMENT][unit] = softpipe->pstipple.sampler;
 365
 366       /* sampler view state */
 367       softpipe_set_sampler_views(&softpipe->pipe, PIPE_SHADER_FRAGMENT,
 368                                  unit, 1, &softpipe->pstipple.sampler_view);
 369
 370       softpipe->dirty |= SP_NEW_SAMPLER;
 371    }
 372 }
 373
 374
 375 /* Hopefully this will remain quite simple, otherwise need to pull in
 376  * something like the state tracker mechanism.
 377  */
 378 void
 379 softpipe_update_derived(struct softpipe_context *softpipe, unsigned prim)
 380 {
 381    struct softpipe_screen *sp_screen = softpipe_screen(softpipe->pipe.screen);
 382
 383    /* Check for updated textures.
 384     */
 385    if (softpipe->tex_timestamp != sp_screen->timestamp) {
 386       softpipe->tex_timestamp = sp_screen->timestamp;
 387       softpipe->dirty |= SP_NEW_TEXTURE;
 388    }
 389
 390 #if DO_PSTIPPLE_IN_HELPER_MODULE
 391    if (softpipe->dirty & SP_NEW_STIPPLE)
 392       /* before updating samplers! */
 393       update_polygon_stipple_pattern(softpipe);
 394 #endif
 395
 396    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 397                           SP_NEW_FS))
 398       update_fragment_shader(softpipe, prim);
 399
 400 #if DO_PSTIPPLE_IN_HELPER_MODULE
 401    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 402                           SP_NEW_STIPPLE |
 403                           SP_NEW_FS))
 404       update_polygon_stipple_enable(softpipe, prim);
 405 #endif
 406
 407    /* TODO: this looks suboptimal */
 408    if (softpipe->dirty & (SP_NEW_SAMPLER |
 409                           SP_NEW_TEXTURE |
 410                           SP_NEW_FS |
 411                           SP_NEW_VS))
 412       update_tgsi_samplers( softpipe );
 413
 414    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 415                           SP_NEW_FS |
 416                           SP_NEW_VS))
 417       invalidate_vertex_layout( softpipe );
 418
 419    if (softpipe->dirty & (SP_NEW_SCISSOR |
 420                           SP_NEW_RASTERIZER |
 421                           SP_NEW_FRAMEBUFFER))
 422       compute_cliprect(softpipe);
 423
 424    if (softpipe->dirty & (SP_NEW_BLEND |
 425                           SP_NEW_DEPTH_STENCIL_ALPHA |
 426                           SP_NEW_FRAMEBUFFER |
 427                           SP_NEW_STIPPLE |
 428                           SP_NEW_FS))
 429       sp_build_quad_pipeline(softpipe);
 430
 431    softpipe->dirty = 0;
 432 }