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       /*
  87        * Loop over fragment shader inputs, searching for the matching output
  88        * from the vertex shader.
  89        */
  90       vinfo->num_attribs = 0;
  91       for (i = 0; i < fsInfo->num_inputs; i++) {
  92          int src;
  93          enum interp_mode interp = INTERP_LINEAR;
  94
  95          switch (fsInfo->input_interpolate[i]) {
  96          case TGSI_INTERPOLATE_CONSTANT:
  97             interp = INTERP_CONSTANT;
  98             break;
  99          case TGSI_INTERPOLATE_LINEAR:
 100             interp = INTERP_LINEAR;
 101             break;
 102          case TGSI_INTERPOLATE_PERSPECTIVE:
 103             interp = INTERP_PERSPECTIVE;
 104             break;
 105          case TGSI_INTERPOLATE_COLOR:
 106             assert(fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR);
 107             break;
 108          default:
 109             assert(0);
 110          }
 111
 112          switch (fsInfo->input_semantic_name[i]) {
 113          case TGSI_SEMANTIC_POSITION:
 114             interp = INTERP_POS;
 115             break;
 116
 117          case TGSI_SEMANTIC_COLOR:
 118             if (fsInfo->input_interpolate[i] == TGSI_INTERPOLATE_COLOR) {
 119                if (softpipe->rasterizer->flatshade)
 120                   interp = INTERP_CONSTANT;
 121                else
 122                   interp = INTERP_PERSPECTIVE;
 123             }
 124             break;
 125          }
 126
 127          /* this includes texcoords and varying vars */
 128          src = draw_find_shader_output(softpipe->draw,
 129                                        fsInfo->input_semantic_name[i],
 130                                        fsInfo->input_semantic_index[i]);
 131          if (fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR && src == -1)
 132            /* try and find a bcolor */
 133            src = draw_find_shader_output(softpipe->draw,
 134                                          TGSI_SEMANTIC_BCOLOR, fsInfo->input_semantic_index[i]);
 135
 136          draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
 137       }
 138
 139       /* Figure out if we need pointsize as well. */
 140       vs_index = draw_find_shader_output(softpipe->draw,
 141                                          TGSI_SEMANTIC_PSIZE, 0);
 142
 143       if (vs_index >= 0) {
 144          softpipe->psize_slot = vinfo->num_attribs;
 145          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
 146       }
 147
 148       /* Figure out if we need viewport index */
 149       vs_index = draw_find_shader_output(softpipe->draw,
 150                                          TGSI_SEMANTIC_VIEWPORT_INDEX,
 151                                          0);
 152       if (vs_index >= 0) {
 153          softpipe->viewport_index_slot = vinfo->num_attribs;
 154          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
 155       } else {
 156          softpipe->viewport_index_slot = 0;
 157       }
 158
 159       /* Figure out if we need layer */
 160       vs_index = draw_find_shader_output(softpipe->draw,
 161                                          TGSI_SEMANTIC_LAYER,
 162                                          0);
 163       if (vs_index >= 0) {
 164          softpipe->layer_slot = vinfo->num_attribs;
 165          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, vs_index);
 166       } else {
 167          softpipe->layer_slot = 0;
 168       }
 169
 170       draw_compute_vertex_size(vinfo);
 171    }
 172
 173    return vinfo;
 174 }
 175
 176
 177 /**
 178  * Called from vbuf module.
 179  *
 180  * Note that there's actually two different vertex layouts in softpipe.
 181  *
 182  * The normal one is computed in softpipe_get_vertex_info() above and is
 183  * used by the point/line/tri "setup" code.
 184  *
 185  * The other one (this one) is only used by the vbuf module (which is
 186  * not normally used by default but used in testing).  For the vbuf module,
 187  * we basically want to pass-through the draw module's vertex layout as-is.
 188  * When the softpipe vbuf code begins drawing, the normal vertex layout
 189  * will come into play again.
 190  */
 191 struct vertex_info *
 192 softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe)
 193 {
 194    (void) softpipe_get_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 }