src/gallium/drivers/softpipe/sp_state_derived.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 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 #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_tile_cache.h"
  40
  41
  42 /**
  43  * Mark the current vertex layout as "invalid".
  44  * We'll validate the vertex layout later, when we start to actually
  45  * render a point or line or tri.
  46  */
  47 static void
  48 invalidate_vertex_layout(struct softpipe_context *softpipe)
  49 {
  50    softpipe->vertex_info.num_attribs =  0;
  51 }
  52
  53
  54 /**
  55  * The vertex info describes how to convert the post-transformed vertices
  56  * (simple float[][4]) used by the 'draw' module into vertices for
  57  * rasterization.
  58  *
  59  * This function validates the vertex layout and returns a pointer to a
  60  * vertex_info object.
  61  */
  62 struct vertex_info *
  63 softpipe_get_vertex_info(struct softpipe_context *softpipe)
  64 {
  65    struct vertex_info *vinfo = &softpipe->vertex_info;
  66
  67    if (vinfo->num_attribs == 0) {
  68       /* compute vertex layout now */
  69       const struct tgsi_shader_info *fsInfo = &softpipe->fs_variant->info;
  70       struct vertex_info *vinfo_vbuf = &softpipe->vertex_info_vbuf;
  71       const uint num = draw_num_shader_outputs(softpipe->draw);
  72       uint i;
  73
  74       /* Tell draw_vbuf to simply emit the whole post-xform vertex
  75        * as-is.  No longer any need to try and emit draw vertex_header
  76        * info.
  77        */
  78       vinfo_vbuf->num_attribs = 0;
  79       for (i = 0; i < num; i++) {
  80          draw_emit_vertex_attr(vinfo_vbuf, EMIT_4F, INTERP_PERSPECTIVE, i);
  81       }
  82       draw_compute_vertex_size(vinfo_vbuf);
  83
  84       /*
  85        * Loop over fragment shader inputs, searching for the matching output
  86        * from the vertex shader.
  87        */
  88       vinfo->num_attribs = 0;
  89       for (i = 0; i < fsInfo->num_inputs; i++) {
  90          int src;
  91          enum interp_mode interp;
  92
  93          switch (fsInfo->input_interpolate[i]) {
  94          case TGSI_INTERPOLATE_CONSTANT:
  95             interp = INTERP_CONSTANT;
  96             break;
  97          case TGSI_INTERPOLATE_LINEAR:
  98             interp = INTERP_LINEAR;
  99             break;
 100          case TGSI_INTERPOLATE_PERSPECTIVE:
 101             interp = INTERP_PERSPECTIVE;
 102             break;
 103          default:
 104             assert(0);
 105             interp = INTERP_LINEAR;
 106          }
 107
 108          switch (fsInfo->input_semantic_name[i]) {
 109          case TGSI_SEMANTIC_POSITION:
 110             interp = INTERP_POS;
 111             break;
 112
 113          case TGSI_SEMANTIC_COLOR:
 114             if (softpipe->rasterizer->flatshade) {
 115                interp = INTERP_CONSTANT;
 116             }
 117             break;
 118          }
 119
 120          /* this includes texcoords and varying vars */
 121          src = draw_find_shader_output(softpipe->draw,
 122                                        fsInfo->input_semantic_name[i],
 123                                        fsInfo->input_semantic_index[i]);
 124          if (fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR && src == 0)
 125            /* try and find a bcolor */
 126            src = draw_find_shader_output(softpipe->draw,
 127                                          TGSI_SEMANTIC_BCOLOR, fsInfo->input_semantic_index[i]);
 128
 129          draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);
 130       }
 131
 132       softpipe->psize_slot = draw_find_shader_output(softpipe->draw,
 133                                                  TGSI_SEMANTIC_PSIZE, 0);
 134       if (softpipe->psize_slot > 0) {
 135          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT,
 136                                softpipe->psize_slot);
 137       }
 138
 139       draw_compute_vertex_size(vinfo);
 140    }
 141
 142    return vinfo;
 143 }
 144
 145
 146 /**
 147  * Called from vbuf module.
 148  *
 149  * Note that there's actually two different vertex layouts in softpipe.
 150  *
 151  * The normal one is computed in softpipe_get_vertex_info() above and is
 152  * used by the point/line/tri "setup" code.
 153  *
 154  * The other one (this one) is only used by the vbuf module (which is
 155  * not normally used by default but used in testing).  For the vbuf module,
 156  * we basically want to pass-through the draw module's vertex layout as-is.
 157  * When the softpipe vbuf code begins drawing, the normal vertex layout
 158  * will come into play again.
 159  */
 160 struct vertex_info *
 161 softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe)
 162 {
 163    (void) softpipe_get_vertex_info(softpipe);
 164    return &softpipe->vertex_info_vbuf;
 165 }
 166
 167
 168 /**
 169  * Recompute cliprect from scissor bounds, scissor enable and surface size.
 170  */
 171 static void
 172 compute_cliprect(struct softpipe_context *sp)
 173 {
 174    /* SP_NEW_FRAMEBUFFER
 175     */
 176    uint surfWidth = sp->framebuffer.width;
 177    uint surfHeight = sp->framebuffer.height;
 178
 179    /* SP_NEW_RASTERIZER
 180     */
 181    if (sp->rasterizer->scissor) {
 182
 183       /* SP_NEW_SCISSOR
 184        *
 185        * clip to scissor rect:
 186        */
 187       sp->cliprect.minx = MAX2(sp->scissor.minx, 0);
 188       sp->cliprect.miny = MAX2(sp->scissor.miny, 0);
 189       sp->cliprect.maxx = MIN2(sp->scissor.maxx, surfWidth);
 190       sp->cliprect.maxy = MIN2(sp->scissor.maxy, surfHeight);
 191    }
 192    else {
 193       /* clip to surface bounds */
 194       sp->cliprect.minx = 0;
 195       sp->cliprect.miny = 0;
 196       sp->cliprect.maxx = surfWidth;
 197       sp->cliprect.maxy = surfHeight;
 198    }
 199 }
 200
 201
 202 static void
 203 update_tgsi_samplers( struct softpipe_context *softpipe )
 204 {
 205    unsigned i;
 206
 207    softpipe_reset_sampler_variants( softpipe );
 208
 209    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 210       struct softpipe_tex_tile_cache *tc = softpipe->fragment_tex_cache[i];
 211       if (tc && tc->texture) {
 212          struct softpipe_resource *spt = softpipe_resource(tc->texture);
 213          if (spt->timestamp != tc->timestamp) {
 214             sp_tex_tile_cache_validate_texture( tc );
 215             /*
 216             _debug_printf("INV %d %d\n", tc->timestamp, spt->timestamp);
 217             */
 218             tc->timestamp = spt->timestamp;
 219          }
 220       }
 221    }
 222
 223    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 224       struct softpipe_tex_tile_cache *tc = softpipe->vertex_tex_cache[i];
 225
 226       if (tc && tc->texture) {
 227          struct softpipe_resource *spt = softpipe_resource(tc->texture);
 228
 229          if (spt->timestamp != tc->timestamp) {
 230             sp_tex_tile_cache_validate_texture(tc);
 231             tc->timestamp = spt->timestamp;
 232          }
 233       }
 234    }
 235
 236    for (i = 0; i < PIPE_MAX_GEOMETRY_SAMPLERS; i++) {
 237       struct softpipe_tex_tile_cache *tc = softpipe->geometry_tex_cache[i];
 238
 239       if (tc && tc->texture) {
 240          struct softpipe_resource *spt = softpipe_resource(tc->texture);
 241
 242          if (spt->timestamp != tc->timestamp) {
 243             sp_tex_tile_cache_validate_texture(tc);
 244             tc->timestamp = spt->timestamp;
 245          }
 246       }
 247    }
 248 }
 249
 250
 251 static void
 252 update_fragment_shader(struct softpipe_context *softpipe, unsigned prim)
 253 {
 254    struct sp_fragment_shader_variant_key key;
 255
 256    memset(&key, 0, sizeof(key));
 257
 258    if (prim == PIPE_PRIM_TRIANGLES)
 259       key.polygon_stipple = softpipe->rasterizer->poly_stipple_enable;
 260
 261    if (softpipe->fs) {
 262       softpipe->fs_variant = softpipe_find_fs_variant(softpipe,
 263                                                       softpipe->fs, &key);
 264    }
 265    else {
 266       softpipe->fs_variant = NULL;
 267    }
 268
 269    /* This would be the logical place to pass the fragment shader
 270     * to the draw module.  However, doing this here, during state
 271     * validation, causes problems with the 'draw' module helpers for
 272     * wide/AA/stippled lines.
 273     * In principle, the draw's fragment shader should be per-variant
 274     * but that doesn't work.  So we use a single draw fragment shader
 275     * per fragment shader, not per variant.
 276     */
 277 #if 0
 278    if (softpipe->fs_variant) {
 279       draw_bind_fragment_shader(softpipe->draw,
 280                                 softpipe->fs_variant->draw_shader);
 281    }
 282    else {
 283       draw_bind_fragment_shader(softpipe->draw, NULL);
 284    }
 285 #endif
 286 }
 287
 288
 289 /**
 290  * This should be called when the polygon stipple pattern changes.
 291  * We create a new texture from the stipple pattern and create a new
 292  * sampler view.
 293  */
 294 static void
 295 update_polygon_stipple_pattern(struct softpipe_context *softpipe)
 296 {
 297    struct pipe_resource *tex;
 298    struct pipe_sampler_view *view;
 299
 300    tex = util_pstipple_create_stipple_texture(&softpipe->pipe,
 301                                               softpipe->poly_stipple.stipple);
 302    pipe_resource_reference(&softpipe->pstipple.texture, tex);
 303    pipe_resource_reference(&tex, NULL);
 304
 305    view = util_pstipple_create_sampler_view(&softpipe->pipe,
 306                                             softpipe->pstipple.texture);
 307    pipe_sampler_view_reference(&softpipe->pstipple.sampler_view, view);
 308    pipe_sampler_view_reference(&view, NULL);
 309 }
 310
 311
 312 /**
 313  * Should be called when polygon stipple is enabled/disabled or when
 314  * the fragment shader changes.
 315  * We add/update the fragment sampler and sampler views to sample from
 316  * the polygon stipple texture.  The texture unit that we use depends on
 317  * the fragment shader (we need to use a unit not otherwise used by the
 318  * shader).
 319  */
 320 static void
 321 update_polygon_stipple_enable(struct softpipe_context *softpipe, unsigned prim)
 322 {
 323    if (prim == PIPE_PRIM_TRIANGLES &&
 324        softpipe->fs_variant->key.polygon_stipple) {
 325       const unsigned unit = softpipe->fs_variant->stipple_sampler_unit;
 326
 327       assert(unit >= softpipe->num_fragment_samplers);
 328
 329       /* sampler state */
 330       softpipe->fragment_samplers[unit] = softpipe->pstipple.sampler;
 331
 332       /* sampler view */
 333       pipe_sampler_view_reference(&softpipe->fragment_sampler_views[unit],
 334                                   softpipe->pstipple.sampler_view);
 335
 336       sp_tex_tile_cache_set_sampler_view(softpipe->fragment_tex_cache[unit],
 337                                          softpipe->pstipple.sampler_view);
 338
 339       softpipe->dirty |= SP_NEW_SAMPLER;
 340    }
 341 }
 342
 343
 344 /* Hopefully this will remain quite simple, otherwise need to pull in
 345  * something like the state tracker mechanism.
 346  */
 347 void
 348 softpipe_update_derived(struct softpipe_context *softpipe, unsigned prim)
 349 {
 350    struct softpipe_screen *sp_screen = softpipe_screen(softpipe->pipe.screen);
 351
 352    /* Check for updated textures.
 353     */
 354    if (softpipe->tex_timestamp != sp_screen->timestamp) {
 355       softpipe->tex_timestamp = sp_screen->timestamp;
 356       softpipe->dirty |= SP_NEW_TEXTURE;
 357    }
 358
 359 #if DO_PSTIPPLE_IN_HELPER_MODULE
 360    if (softpipe->dirty & SP_NEW_STIPPLE)
 361       /* before updating samplers! */
 362       update_polygon_stipple_pattern(softpipe);
 363 #endif
 364
 365    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 366                           SP_NEW_FS))
 367       update_fragment_shader(softpipe, prim);
 368
 369 #if DO_PSTIPPLE_IN_HELPER_MODULE
 370    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 371                           SP_NEW_STIPPLE |
 372                           SP_NEW_FS))
 373       update_polygon_stipple_enable(softpipe, prim);
 374 #endif
 375
 376    if (softpipe->dirty & (SP_NEW_SAMPLER |
 377                           SP_NEW_TEXTURE |
 378                           SP_NEW_FS |
 379                           SP_NEW_VS))
 380       update_tgsi_samplers( softpipe );
 381
 382    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 383                           SP_NEW_FS |
 384                           SP_NEW_VS))
 385       invalidate_vertex_layout( softpipe );
 386
 387    if (softpipe->dirty & (SP_NEW_SCISSOR |
 388                           SP_NEW_RASTERIZER |
 389                           SP_NEW_FRAMEBUFFER))
 390       compute_cliprect(softpipe);
 391
 392    if (softpipe->dirty & (SP_NEW_BLEND |
 393                           SP_NEW_DEPTH_STENCIL_ALPHA |
 394                           SP_NEW_FRAMEBUFFER |
 395                           SP_NEW_FS))
 396       sp_build_quad_pipeline(softpipe);
 397
 398    softpipe->dirty = 0;
 399 }