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