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->vertex_info.num_attribs =  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 and returns a pointer to a
  61  * vertex_info object.
  62  */
  63 struct vertex_info *
  64 softpipe_get_vertex_info(struct softpipe_context *softpipe)
  65 {
  66    struct vertex_info *vinfo = &softpipe->vertex_info;
  67    int vs_index;
  68
  69    if (vinfo->num_attribs == 0) {
  70       /* compute vertex layout now */
  71       const struct tgsi_shader_info *fsInfo = &softpipe->fs_variant->info;
  72       struct vertex_info *vinfo_vbuf = &softpipe->vertex_info_vbuf;
  73       const uint num = draw_num_shader_outputs(softpipe->draw);
  74       uint i;
  75
  76       /* Tell draw_vbuf to simply emit the whole post-xform vertex
  77        * as-is.  No longer any need to try and emit draw vertex_header
  78        * info.
  79        */
  80       vinfo_vbuf->num_attribs = 0;
  81       for (i = 0; i < num; i++) {
  82          draw_emit_vertex_attr(vinfo_vbuf, EMIT_4F, INTERP_PERSPECTIVE, i);
  83       }
  84       draw_compute_vertex_size(vinfo_vbuf);
  85
  86       softpipe->viewport_index_slot = 0;
  87       softpipe->layer_slot = 0;
  88       softpipe->psize_slot = 0;
  89
  90       /*
  91        * Loop over fragment shader inputs, searching for the matching output
  92        * from the vertex shader.
  93        */
  94       vinfo->num_attribs = 0;
  95       for (i = 0; i < fsInfo->num_inputs; i++) {
  96          int src;
  97          enum interp_mode interp = INTERP_LINEAR;
  98
  99          switch (fsInfo->input_interpolate[i]) {
 100          case TGSI_INTERPOLATE_CONSTANT:
 101             interp = INTERP_CONSTANT;
 102             break;
 103          case TGSI_INTERPOLATE_LINEAR:
 104             interp = INTERP_LINEAR;
 105             break;
 106          case TGSI_INTERPOLATE_PERSPECTIVE:
 107             interp = INTERP_PERSPECTIVE;
 108             break;
 109          case TGSI_INTERPOLATE_COLOR:
 110             assert(fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR);
 111             break;
 112          default:
 113             assert(0);
 114          }
 115
 116          switch (fsInfo->input_semantic_name[i]) {
 117          case TGSI_SEMANTIC_POSITION:
 118             interp = INTERP_POS;
 119             break;
 120
 121          case TGSI_SEMANTIC_COLOR:
 122             if (fsInfo->input_interpolate[i] == TGSI_INTERPOLATE_COLOR) {
 123                if (softpipe->rasterizer->flatshade)
 124                   interp = INTERP_CONSTANT;
 125                else
 126                   interp = INTERP_PERSPECTIVE;
 127             }
 128             break;
 129          }
 130
 131          /* this includes texcoords and varying vars */
 132          src = draw_find_shader_output(softpipe->draw,
 133                                        fsInfo->input_semantic_name[i],
 134                                        fsInfo->input_semantic_index[i]);
 135          if (fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR && src == -1)
 136             /*
 137              * try and find a bcolor.
 138              * Note that if there's both front and back color, draw will
 139              * have copied back to front color already.
 140              */
 141             src = draw_find_shader_output(softpipe->draw,
 142                                           TGSI_SEMANTIC_BCOLOR,
 143                                           fsInfo->input_semantic_index[i]);
 144
 145          draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
 146       }
 147
 148       /* Figure out if we need pointsize as well. */
 149       vs_index = draw_find_shader_output(softpipe->draw,
 150                                          TGSI_SEMANTIC_PSIZE, 0);
 151
 152       if (vs_index >= 0) {
 153          softpipe->psize_slot = vs_index;
 154          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
 155       }
 156
 157       /* Figure out if we need viewport index */
 158       vs_index = draw_find_shader_output(softpipe->draw,
 159                                          TGSI_SEMANTIC_VIEWPORT_INDEX,
 160                                          0);
 161       if (vs_index >= 0) {
 162          softpipe->viewport_index_slot = vs_index;
 163          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
 164       }
 165
 166       /* Figure out if we need layer */
 167       vs_index = draw_find_shader_output(softpipe->draw,
 168                                          TGSI_SEMANTIC_LAYER,
 169                                          0);
 170       if (vs_index >= 0) {
 171          softpipe->layer_slot = vs_index;
 172          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
 173       }
 174
 175       draw_compute_vertex_size(vinfo);
 176    }
 177
 178    return vinfo;
 179 }
 180
 181
 182 /**
 183  * Called from vbuf module.
 184  *
 185  * Note that there's actually two different vertex layouts in softpipe.
 186  *
 187  * The normal one is computed in softpipe_get_vertex_info() above and is
 188  * used by the point/line/tri "setup" code.
 189  *
 190  * The other one (this one) is only used by the vbuf module (which is
 191  * not normally used by default but used in testing).  For the vbuf module,
 192  * we basically want to pass-through the draw module's vertex layout as-is.
 193  * When the softpipe vbuf code begins drawing, the normal vertex layout
 194  * will come into play again.
 195  */
 196 struct vertex_info *
 197 softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe)
 198 {
 199    (void) softpipe_get_vertex_info(softpipe);
 200    return &softpipe->vertex_info_vbuf;
 201 }
 202
 203
 204 /**
 205  * Recompute cliprect from scissor bounds, scissor enable and surface size.
 206  */
 207 static void
 208 compute_cliprect(struct softpipe_context *sp)
 209 {
 210    unsigned i;
 211    /* SP_NEW_FRAMEBUFFER
 212     */
 213    uint surfWidth = sp->framebuffer.width;
 214    uint surfHeight = sp->framebuffer.height;
 215
 216    for (i = 0; i < PIPE_MAX_VIEWPORTS; i++) {
 217       /* SP_NEW_RASTERIZER
 218        */
 219       if (sp->rasterizer->scissor) {
 220
 221          /* SP_NEW_SCISSOR
 222           *
 223           * clip to scissor rect:
 224           */
 225          sp->cliprect[i].minx = MAX2(sp->scissors[i].minx, 0);
 226          sp->cliprect[i].miny = MAX2(sp->scissors[i].miny, 0);
 227          sp->cliprect[i].maxx = MIN2(sp->scissors[i].maxx, surfWidth);
 228          sp->cliprect[i].maxy = MIN2(sp->scissors[i].maxy, surfHeight);
 229       }
 230       else {
 231          /* clip to surface bounds */
 232          sp->cliprect[i].minx = 0;
 233          sp->cliprect[i].miny = 0;
 234          sp->cliprect[i].maxx = surfWidth;
 235          sp->cliprect[i].maxy = surfHeight;
 236       }
 237    }
 238 }
 239
 240
 241 static void
 242 set_shader_sampler(struct softpipe_context *softpipe,
 243                    unsigned shader,
 244                    int max_sampler)
 245 {
 246    int i;
 247    for (i = 0; i <= max_sampler; i++) {
 248       softpipe->tgsi.sampler[shader]->sp_sampler[i] =
 249          (struct sp_sampler *)(softpipe->samplers[shader][i]);
 250    }
 251 }
 252
 253 static void
 254 update_tgsi_samplers( struct softpipe_context *softpipe )
 255 {
 256    unsigned i, sh;
 257
 258    set_shader_sampler(softpipe, PIPE_SHADER_VERTEX,
 259                       softpipe->vs->max_sampler);
 260    set_shader_sampler(softpipe, PIPE_SHADER_FRAGMENT,
 261                       softpipe->fs_variant->info.file_max[TGSI_FILE_SAMPLER]);
 262    if (softpipe->gs) {
 263       set_shader_sampler(softpipe, PIPE_SHADER_GEOMETRY,
 264                          softpipe->gs->max_sampler);
 265    }
 266
 267    /* XXX is this really necessary here??? */
 268    for (sh = 0; sh < Elements(softpipe->tex_cache); sh++) {
 269       for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 270          struct softpipe_tex_tile_cache *tc = softpipe->tex_cache[sh][i];
 271          if (tc && tc->texture) {
 272             struct softpipe_resource *spt = softpipe_resource(tc->texture);
 273             if (spt->timestamp != tc->timestamp) {
 274                sp_tex_tile_cache_validate_texture( tc );
 275                /*
 276                  _debug_printf("INV %d %d\n", tc->timestamp, spt->timestamp);
 277                */
 278                tc->timestamp = spt->timestamp;
 279             }
 280          }
 281       }
 282    }
 283 }
 284
 285
 286 static void
 287 update_fragment_shader(struct softpipe_context *softpipe, unsigned prim)
 288 {
 289    struct sp_fragment_shader_variant_key key;
 290
 291    memset(&key, 0, sizeof(key));
 292
 293    if (prim == PIPE_PRIM_TRIANGLES)
 294       key.polygon_stipple = softpipe->rasterizer->poly_stipple_enable;
 295
 296    if (softpipe->fs) {
 297       softpipe->fs_variant = softpipe_find_fs_variant(softpipe,
 298                                                       softpipe->fs, &key);
 299
 300       /* prepare the TGSI interpreter for FS execution */
 301       softpipe->fs_variant->prepare(softpipe->fs_variant,
 302                                     softpipe->fs_machine,
 303                                     (struct tgsi_sampler *) softpipe->
 304                                     tgsi.sampler[PIPE_SHADER_FRAGMENT]);
 305    }
 306    else {
 307       softpipe->fs_variant = NULL;
 308    }
 309
 310    /* This would be the logical place to pass the fragment shader
 311     * to the draw module.  However, doing this here, during state
 312     * validation, causes problems with the 'draw' module helpers for
 313     * wide/AA/stippled lines.
 314     * In principle, the draw's fragment shader should be per-variant
 315     * but that doesn't work.  So we use a single draw fragment shader
 316     * per fragment shader, not per variant.
 317     */
 318 #if 0
 319    if (softpipe->fs_variant) {
 320       draw_bind_fragment_shader(softpipe->draw,
 321                                 softpipe->fs_variant->draw_shader);
 322    }
 323    else {
 324       draw_bind_fragment_shader(softpipe->draw, NULL);
 325    }
 326 #endif
 327 }
 328
 329
 330 /**
 331  * This should be called when the polygon stipple pattern changes.
 332  * We create a new texture from the stipple pattern and create a new
 333  * sampler view.
 334  */
 335 static void
 336 update_polygon_stipple_pattern(struct softpipe_context *softpipe)
 337 {
 338    struct pipe_resource *tex;
 339    struct pipe_sampler_view *view;
 340
 341    tex = util_pstipple_create_stipple_texture(&softpipe->pipe,
 342                                               softpipe->poly_stipple.stipple);
 343    pipe_resource_reference(&softpipe->pstipple.texture, tex);
 344    pipe_resource_reference(&tex, NULL);
 345
 346    view = util_pstipple_create_sampler_view(&softpipe->pipe,
 347                                             softpipe->pstipple.texture);
 348    pipe_sampler_view_reference(&softpipe->pstipple.sampler_view, view);
 349    pipe_sampler_view_reference(&view, NULL);
 350 }
 351
 352
 353 /**
 354  * Should be called when polygon stipple is enabled/disabled or when
 355  * the fragment shader changes.
 356  * We add/update the fragment sampler and sampler views to sample from
 357  * the polygon stipple texture.  The texture unit that we use depends on
 358  * the fragment shader (we need to use a unit not otherwise used by the
 359  * shader).
 360  */
 361 static void
 362 update_polygon_stipple_enable(struct softpipe_context *softpipe, unsigned prim)
 363 {
 364    if (prim == PIPE_PRIM_TRIANGLES &&
 365        softpipe->fs_variant->key.polygon_stipple) {
 366       const unsigned unit = softpipe->fs_variant->stipple_sampler_unit;
 367
 368       /* sampler state */
 369       softpipe->samplers[PIPE_SHADER_FRAGMENT][unit] = softpipe->pstipple.sampler;
 370
 371       /* sampler view state */
 372       softpipe_set_sampler_views(&softpipe->pipe, PIPE_SHADER_FRAGMENT,
 373                                  unit, 1, &softpipe->pstipple.sampler_view);
 374
 375       softpipe->dirty |= SP_NEW_SAMPLER;
 376    }
 377 }
 378
 379
 380 /* Hopefully this will remain quite simple, otherwise need to pull in
 381  * something like the state tracker mechanism.
 382  */
 383 void
 384 softpipe_update_derived(struct softpipe_context *softpipe, unsigned prim)
 385 {
 386    struct softpipe_screen *sp_screen = softpipe_screen(softpipe->pipe.screen);
 387
 388    /* Check for updated textures.
 389     */
 390    if (softpipe->tex_timestamp != sp_screen->timestamp) {
 391       softpipe->tex_timestamp = sp_screen->timestamp;
 392       softpipe->dirty |= SP_NEW_TEXTURE;
 393    }
 394
 395 #if DO_PSTIPPLE_IN_HELPER_MODULE
 396    if (softpipe->dirty & SP_NEW_STIPPLE)
 397       /* before updating samplers! */
 398       update_polygon_stipple_pattern(softpipe);
 399 #endif
 400
 401    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 402                           SP_NEW_FS))
 403       update_fragment_shader(softpipe, prim);
 404
 405 #if DO_PSTIPPLE_IN_HELPER_MODULE
 406    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 407                           SP_NEW_STIPPLE |
 408                           SP_NEW_FS))
 409       update_polygon_stipple_enable(softpipe, prim);
 410 #endif
 411
 412    /* TODO: this looks suboptimal */
 413    if (softpipe->dirty & (SP_NEW_SAMPLER |
 414                           SP_NEW_TEXTURE |
 415                           SP_NEW_FS |
 416                           SP_NEW_VS))
 417       update_tgsi_samplers( softpipe );
 418
 419    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 420                           SP_NEW_FS |
 421                           SP_NEW_VS))
 422       invalidate_vertex_layout( softpipe );
 423
 424    if (softpipe->dirty & (SP_NEW_SCISSOR |
 425                           SP_NEW_RASTERIZER |
 426                           SP_NEW_FRAMEBUFFER))
 427       compute_cliprect(softpipe);
 428
 429    if (softpipe->dirty & (SP_NEW_BLEND |
 430                           SP_NEW_DEPTH_STENCIL_ALPHA |
 431                           SP_NEW_FRAMEBUFFER |
 432                           SP_NEW_STIPPLE |
 433                           SP_NEW_FS))
 434       sp_build_quad_pipeline(softpipe);
 435
 436    softpipe->dirty = 0;
 437 }