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          case TGSI_INTERPOLATE_COLOR:
 104             assert(fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR);
 105             break;
 106          default:
 107             assert(0);
 108             interp = INTERP_LINEAR;
 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 == 0)
 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 update_tgsi_samplers( struct softpipe_context *softpipe )
 210 {
 211    unsigned i;
 212
 213    softpipe_reset_sampler_variants( softpipe );
 214
 215    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 216       struct softpipe_tex_tile_cache *tc = softpipe->fragment_tex_cache[i];
 217       if (tc && tc->texture) {
 218          struct softpipe_resource *spt = softpipe_resource(tc->texture);
 219          if (spt->timestamp != tc->timestamp) {
 220             sp_tex_tile_cache_validate_texture( tc );
 221             /*
 222             _debug_printf("INV %d %d\n", tc->timestamp, spt->timestamp);
 223             */
 224             tc->timestamp = spt->timestamp;
 225          }
 226       }
 227    }
 228
 229    for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
 230       struct softpipe_tex_tile_cache *tc = softpipe->vertex_tex_cache[i];
 231
 232       if (tc && tc->texture) {
 233          struct softpipe_resource *spt = softpipe_resource(tc->texture);
 234
 235          if (spt->timestamp != tc->timestamp) {
 236             sp_tex_tile_cache_validate_texture(tc);
 237             tc->timestamp = spt->timestamp;
 238          }
 239       }
 240    }
 241
 242    for (i = 0; i < PIPE_MAX_GEOMETRY_SAMPLERS; i++) {
 243       struct softpipe_tex_tile_cache *tc = softpipe->geometry_tex_cache[i];
 244
 245       if (tc && tc->texture) {
 246          struct softpipe_resource *spt = softpipe_resource(tc->texture);
 247
 248          if (spt->timestamp != tc->timestamp) {
 249             sp_tex_tile_cache_validate_texture(tc);
 250             tc->timestamp = spt->timestamp;
 251          }
 252       }
 253    }
 254 }
 255
 256
 257 static void
 258 update_fragment_shader(struct softpipe_context *softpipe, unsigned prim)
 259 {
 260    struct sp_fragment_shader_variant_key key;
 261
 262    memset(&key, 0, sizeof(key));
 263
 264    if (prim == PIPE_PRIM_TRIANGLES)
 265       key.polygon_stipple = softpipe->rasterizer->poly_stipple_enable;
 266
 267    if (softpipe->fs) {
 268       softpipe->fs_variant = softpipe_find_fs_variant(softpipe,
 269                                                       softpipe->fs, &key);
 270    }
 271    else {
 272       softpipe->fs_variant = NULL;
 273    }
 274
 275    /* This would be the logical place to pass the fragment shader
 276     * to the draw module.  However, doing this here, during state
 277     * validation, causes problems with the 'draw' module helpers for
 278     * wide/AA/stippled lines.
 279     * In principle, the draw's fragment shader should be per-variant
 280     * but that doesn't work.  So we use a single draw fragment shader
 281     * per fragment shader, not per variant.
 282     */
 283 #if 0
 284    if (softpipe->fs_variant) {
 285       draw_bind_fragment_shader(softpipe->draw,
 286                                 softpipe->fs_variant->draw_shader);
 287    }
 288    else {
 289       draw_bind_fragment_shader(softpipe->draw, NULL);
 290    }
 291 #endif
 292 }
 293
 294
 295 /**
 296  * This should be called when the polygon stipple pattern changes.
 297  * We create a new texture from the stipple pattern and create a new
 298  * sampler view.
 299  */
 300 static void
 301 update_polygon_stipple_pattern(struct softpipe_context *softpipe)
 302 {
 303    struct pipe_resource *tex;
 304    struct pipe_sampler_view *view;
 305
 306    tex = util_pstipple_create_stipple_texture(&softpipe->pipe,
 307                                               softpipe->poly_stipple.stipple);
 308    pipe_resource_reference(&softpipe->pstipple.texture, tex);
 309    pipe_resource_reference(&tex, NULL);
 310
 311    view = util_pstipple_create_sampler_view(&softpipe->pipe,
 312                                             softpipe->pstipple.texture);
 313    pipe_sampler_view_reference(&softpipe->pstipple.sampler_view, view);
 314    pipe_sampler_view_reference(&view, NULL);
 315 }
 316
 317
 318 /**
 319  * Should be called when polygon stipple is enabled/disabled or when
 320  * the fragment shader changes.
 321  * We add/update the fragment sampler and sampler views to sample from
 322  * the polygon stipple texture.  The texture unit that we use depends on
 323  * the fragment shader (we need to use a unit not otherwise used by the
 324  * shader).
 325  */
 326 static void
 327 update_polygon_stipple_enable(struct softpipe_context *softpipe, unsigned prim)
 328 {
 329    if (prim == PIPE_PRIM_TRIANGLES &&
 330        softpipe->fs_variant->key.polygon_stipple) {
 331       const unsigned unit = softpipe->fs_variant->stipple_sampler_unit;
 332
 333       assert(unit >= softpipe->num_fragment_samplers);
 334
 335       /* sampler state */
 336       softpipe->fragment_samplers[unit] = softpipe->pstipple.sampler;
 337
 338       /* sampler view */
 339       pipe_sampler_view_reference(&softpipe->fragment_sampler_views[unit],
 340                                   softpipe->pstipple.sampler_view);
 341
 342       sp_tex_tile_cache_set_sampler_view(softpipe->fragment_tex_cache[unit],
 343                                          softpipe->pstipple.sampler_view);
 344
 345       softpipe->dirty |= SP_NEW_SAMPLER;
 346    }
 347 }
 348
 349
 350 /* Hopefully this will remain quite simple, otherwise need to pull in
 351  * something like the state tracker mechanism.
 352  */
 353 void
 354 softpipe_update_derived(struct softpipe_context *softpipe, unsigned prim)
 355 {
 356    struct softpipe_screen *sp_screen = softpipe_screen(softpipe->pipe.screen);
 357
 358    /* Check for updated textures.
 359     */
 360    if (softpipe->tex_timestamp != sp_screen->timestamp) {
 361       softpipe->tex_timestamp = sp_screen->timestamp;
 362       softpipe->dirty |= SP_NEW_TEXTURE;
 363    }
 364
 365 #if DO_PSTIPPLE_IN_HELPER_MODULE
 366    if (softpipe->dirty & SP_NEW_STIPPLE)
 367       /* before updating samplers! */
 368       update_polygon_stipple_pattern(softpipe);
 369 #endif
 370
 371    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 372                           SP_NEW_FS))
 373       update_fragment_shader(softpipe, prim);
 374
 375 #if DO_PSTIPPLE_IN_HELPER_MODULE
 376    if (softpipe->dirty & (SP_NEW_RASTERIZER |
 377                           SP_NEW_STIPPLE |
 378                           SP_NEW_FS))
 379       update_polygon_stipple_enable(softpipe, prim);
 380 #endif
 381
 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 }