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