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