src/mesa/state_tracker/st_manager.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2010 LunarG Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Chia-I Wu <olv@lunarg.com>
  26  */
  27
  28 #include "main/mtypes.h"
  29 #include "main/extensions.h"
  30 #include "main/context.h"
  31 #include "main/debug_output.h"
  32 #include "main/glthread.h"
  33 #include "main/texobj.h"
  34 #include "main/teximage.h"
  35 #include "main/texstate.h"
  36 #include "main/errors.h"
  37 #include "main/framebuffer.h"
  38 #include "main/fbobject.h"
  39 #include "main/renderbuffer.h"
  40 #include "main/version.h"
  41 #include "util/hash_table.h"
  42 #include "st_texture.h"
  43
  44 #include "st_context.h"
  45 #include "st_debug.h"
  46 #include "st_extensions.h"
  47 #include "st_format.h"
  48 #include "st_cb_bitmap.h"
  49 #include "st_cb_fbo.h"
  50 #include "st_cb_flush.h"
  51 #include "st_manager.h"
  52 #include "st_sampler_view.h"
  53
  54 #include "state_tracker/st_gl_api.h"
  55
  56 #include "pipe/p_context.h"
  57 #include "pipe/p_screen.h"
  58 #include "util/u_format.h"
  59 #include "util/u_pointer.h"
  60 #include "util/u_inlines.h"
  61 #include "util/u_atomic.h"
  62 #include "util/u_surface.h"
  63 #include "util/list.h"
  64
  65 struct hash_table;
  66 struct st_manager_private
  67 {
  68    struct hash_table *stfbi_ht; /* framebuffer iface objects hash table */
  69    mtx_t st_mutex;
  70 };
  71
  72
  73 /**
  74  * Map an attachment to a buffer index.
  75  */
  76 static inline gl_buffer_index
  77 attachment_to_buffer_index(enum st_attachment_type statt)
  78 {
  79    gl_buffer_index index;
  80
  81    switch (statt) {
  82    case ST_ATTACHMENT_FRONT_LEFT:
  83       index = BUFFER_FRONT_LEFT;
  84       break;
  85    case ST_ATTACHMENT_BACK_LEFT:
  86       index = BUFFER_BACK_LEFT;
  87       break;
  88    case ST_ATTACHMENT_FRONT_RIGHT:
  89       index = BUFFER_FRONT_RIGHT;
  90       break;
  91    case ST_ATTACHMENT_BACK_RIGHT:
  92       index = BUFFER_BACK_RIGHT;
  93       break;
  94    case ST_ATTACHMENT_DEPTH_STENCIL:
  95       index = BUFFER_DEPTH;
  96       break;
  97    case ST_ATTACHMENT_ACCUM:
  98       index = BUFFER_ACCUM;
  99       break;
 100    case ST_ATTACHMENT_SAMPLE:
 101    default:
 102       index = BUFFER_COUNT;
 103       break;
 104    }
 105
 106    return index;
 107 }
 108
 109
 110 /**
 111  * Map a buffer index to an attachment.
 112  */
 113 static inline enum st_attachment_type
 114 buffer_index_to_attachment(gl_buffer_index index)
 115 {
 116    enum st_attachment_type statt;
 117
 118    switch (index) {
 119    case BUFFER_FRONT_LEFT:
 120       statt = ST_ATTACHMENT_FRONT_LEFT;
 121       break;
 122    case BUFFER_BACK_LEFT:
 123       statt = ST_ATTACHMENT_BACK_LEFT;
 124       break;
 125    case BUFFER_FRONT_RIGHT:
 126       statt = ST_ATTACHMENT_FRONT_RIGHT;
 127       break;
 128    case BUFFER_BACK_RIGHT:
 129       statt = ST_ATTACHMENT_BACK_RIGHT;
 130       break;
 131    case BUFFER_DEPTH:
 132       statt = ST_ATTACHMENT_DEPTH_STENCIL;
 133       break;
 134    case BUFFER_ACCUM:
 135       statt = ST_ATTACHMENT_ACCUM;
 136       break;
 137    default:
 138       statt = ST_ATTACHMENT_INVALID;
 139       break;
 140    }
 141
 142    return statt;
 143 }
 144
 145
 146 /**
 147  * Make sure a context picks up the latest cached state of the
 148  * drawables it binds to.
 149  */
 150 static void
 151 st_context_validate(struct st_context *st,
 152                     struct st_framebuffer *stdraw,
 153                     struct st_framebuffer *stread)
 154 {
 155     if (stdraw && stdraw->stamp != st->draw_stamp) {
 156        st->dirty |= ST_NEW_FRAMEBUFFER;
 157        _mesa_resize_framebuffer(st->ctx, &stdraw->Base,
 158                                 stdraw->Base.Width,
 159                                 stdraw->Base.Height);
 160        st->draw_stamp = stdraw->stamp;
 161     }
 162
 163     if (stread && stread->stamp != st->read_stamp) {
 164        if (stread != stdraw) {
 165           st->dirty |= ST_NEW_FRAMEBUFFER;
 166           _mesa_resize_framebuffer(st->ctx, &stread->Base,
 167                                    stread->Base.Width,
 168                                    stread->Base.Height);
 169        }
 170        st->read_stamp = stread->stamp;
 171     }
 172 }
 173
 174
 175 /**
 176  * Validate a framebuffer to make sure up-to-date pipe_textures are used.
 177  * The context is only used for creating pipe surfaces and for calling
 178  * _mesa_resize_framebuffer().
 179  * (That should probably be rethought, since those surfaces become
 180  * drawable state, not context state, and can be freed by another pipe
 181  * context).
 182  */
 183 static void
 184 st_framebuffer_validate(struct st_framebuffer *stfb,
 185                         struct st_context *st)
 186 {
 187    struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
 188    uint width, height;
 189    unsigned i;
 190    boolean changed = FALSE;
 191    int32_t new_stamp;
 192
 193    new_stamp = p_atomic_read(&stfb->iface->stamp);
 194    if (stfb->iface_stamp == new_stamp)
 195       return;
 196
 197    memset(textures, 0, stfb->num_statts * sizeof(textures[0]));
 198
 199    /* validate the fb */
 200    do {
 201       if (!stfb->iface->validate(&st->iface, stfb->iface, stfb->statts,
 202                                  stfb->num_statts, textures))
 203          return;
 204
 205       stfb->iface_stamp = new_stamp;
 206       new_stamp = p_atomic_read(&stfb->iface->stamp);
 207    } while(stfb->iface_stamp != new_stamp);
 208
 209    width = stfb->Base.Width;
 210    height = stfb->Base.Height;
 211
 212    for (i = 0; i < stfb->num_statts; i++) {
 213       struct st_renderbuffer *strb;
 214       struct pipe_surface *ps, surf_tmpl;
 215       gl_buffer_index idx;
 216
 217       if (!textures[i])
 218          continue;
 219
 220       idx = attachment_to_buffer_index(stfb->statts[i]);
 221       if (idx >= BUFFER_COUNT) {
 222          pipe_resource_reference(&textures[i], NULL);
 223          continue;
 224       }
 225
 226       strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);
 227       assert(strb);
 228       if (strb->texture == textures[i]) {
 229          pipe_resource_reference(&textures[i], NULL);
 230          continue;
 231       }
 232
 233       u_surface_default_template(&surf_tmpl, textures[i]);
 234       ps = st->pipe->create_surface(st->pipe, textures[i], &surf_tmpl);
 235       if (ps) {
 236          struct pipe_surface **psurf =
 237             util_format_is_srgb(ps->format) ? &strb->surface_srgb :
 238                                               &strb->surface_linear;
 239
 240          pipe_surface_reference(psurf, ps);
 241          strb->surface = *psurf;
 242          pipe_resource_reference(&strb->texture, ps->texture);
 243          /* ownership transfered */
 244          pipe_surface_reference(&ps, NULL);
 245
 246          changed = TRUE;
 247
 248          strb->Base.Width = strb->surface->width;
 249          strb->Base.Height = strb->surface->height;
 250
 251          width = strb->Base.Width;
 252          height = strb->Base.Height;
 253       }
 254
 255       pipe_resource_reference(&textures[i], NULL);
 256    }
 257
 258    if (changed) {
 259       ++stfb->stamp;
 260       _mesa_resize_framebuffer(st->ctx, &stfb->Base, width, height);
 261    }
 262 }
 263
 264
 265 /**
 266  * Update the attachments to validate by looping the existing renderbuffers.
 267  */
 268 static void
 269 st_framebuffer_update_attachments(struct st_framebuffer *stfb)
 270 {
 271    gl_buffer_index idx;
 272
 273    stfb->num_statts = 0;
 274    for (idx = 0; idx < BUFFER_COUNT; idx++) {
 275       struct st_renderbuffer *strb;
 276       enum st_attachment_type statt;
 277
 278       strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);
 279       if (!strb || strb->software)
 280          continue;
 281
 282       statt = buffer_index_to_attachment(idx);
 283       if (statt != ST_ATTACHMENT_INVALID &&
 284           st_visual_have_buffers(stfb->iface->visual, 1 << statt))
 285          stfb->statts[stfb->num_statts++] = statt;
 286    }
 287    stfb->stamp++;
 288 }
 289
 290
 291 /**
 292  * Add a renderbuffer to the framebuffer.  The framebuffer is one that
 293  * corresponds to a window and is not a user-created FBO.
 294  */
 295 static boolean
 296 st_framebuffer_add_renderbuffer(struct st_framebuffer *stfb,
 297                                 gl_buffer_index idx)
 298 {
 299    struct gl_renderbuffer *rb;
 300    enum pipe_format format;
 301    boolean sw;
 302
 303    assert(_mesa_is_winsys_fbo(&stfb->Base));
 304
 305    /* do not distinguish depth/stencil buffers */
 306    if (idx == BUFFER_STENCIL)
 307       idx = BUFFER_DEPTH;
 308
 309    switch (idx) {
 310    case BUFFER_DEPTH:
 311       format = stfb->iface->visual->depth_stencil_format;
 312       sw = FALSE;
 313       break;
 314    case BUFFER_ACCUM:
 315       format = stfb->iface->visual->accum_format;
 316       sw = TRUE;
 317       break;
 318    default:
 319       format = stfb->iface->visual->color_format;
 320       if (stfb->Base.Visual.sRGBCapable)
 321          format = util_format_srgb(format);
 322       sw = FALSE;
 323       break;
 324    }
 325
 326    if (format == PIPE_FORMAT_NONE)
 327       return FALSE;
 328
 329    rb = st_new_renderbuffer_fb(format, stfb->iface->visual->samples, sw);
 330    if (!rb)
 331       return FALSE;
 332
 333    if (idx != BUFFER_DEPTH) {
 334       _mesa_attach_and_own_rb(&stfb->Base, idx, rb);
 335       return TRUE;
 336    }
 337
 338    bool rb_ownership_taken = false;
 339    if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 0)) {
 340       _mesa_attach_and_own_rb(&stfb->Base, BUFFER_DEPTH, rb);
 341       rb_ownership_taken = true;
 342    }
 343
 344    if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1)) {
 345       if (rb_ownership_taken)
 346          _mesa_attach_and_reference_rb(&stfb->Base, BUFFER_STENCIL, rb);
 347       else
 348          _mesa_attach_and_own_rb(&stfb->Base, BUFFER_STENCIL, rb);
 349    }
 350
 351    return TRUE;
 352 }
 353
 354
 355 /**
 356  * Intialize a struct gl_config from a visual.
 357  */
 358 static void
 359 st_visual_to_context_mode(const struct st_visual *visual,
 360                           struct gl_config *mode)
 361 {
 362    memset(mode, 0, sizeof(*mode));
 363
 364    if (st_visual_have_buffers(visual, ST_ATTACHMENT_BACK_LEFT_MASK))
 365       mode->doubleBufferMode = GL_TRUE;
 366
 367    if (st_visual_have_buffers(visual,
 368             ST_ATTACHMENT_FRONT_RIGHT_MASK | ST_ATTACHMENT_BACK_RIGHT_MASK))
 369       mode->stereoMode = GL_TRUE;
 370
 371    if (visual->color_format != PIPE_FORMAT_NONE) {
 372       mode->rgbMode = GL_TRUE;
 373
 374       mode->redBits =
 375          util_format_get_component_bits(visual->color_format,
 376                UTIL_FORMAT_COLORSPACE_RGB, 0);
 377       mode->greenBits =
 378          util_format_get_component_bits(visual->color_format,
 379                UTIL_FORMAT_COLORSPACE_RGB, 1);
 380       mode->blueBits =
 381          util_format_get_component_bits(visual->color_format,
 382                UTIL_FORMAT_COLORSPACE_RGB, 2);
 383       mode->alphaBits =
 384          util_format_get_component_bits(visual->color_format,
 385                UTIL_FORMAT_COLORSPACE_RGB, 3);
 386
 387       mode->rgbBits = mode->redBits +
 388          mode->greenBits + mode->blueBits + mode->alphaBits;
 389       mode->sRGBCapable = util_format_is_srgb(visual->color_format);
 390    }
 391
 392    if (visual->depth_stencil_format != PIPE_FORMAT_NONE) {
 393       mode->depthBits =
 394          util_format_get_component_bits(visual->depth_stencil_format,
 395                UTIL_FORMAT_COLORSPACE_ZS, 0);
 396       mode->stencilBits =
 397          util_format_get_component_bits(visual->depth_stencil_format,
 398                UTIL_FORMAT_COLORSPACE_ZS, 1);
 399
 400       mode->haveDepthBuffer = mode->depthBits > 0;
 401       mode->haveStencilBuffer = mode->stencilBits > 0;
 402    }
 403
 404    if (visual->accum_format != PIPE_FORMAT_NONE) {
 405       mode->haveAccumBuffer = GL_TRUE;
 406
 407       mode->accumRedBits =
 408          util_format_get_component_bits(visual->accum_format,
 409                UTIL_FORMAT_COLORSPACE_RGB, 0);
 410       mode->accumGreenBits =
 411          util_format_get_component_bits(visual->accum_format,
 412                UTIL_FORMAT_COLORSPACE_RGB, 1);
 413       mode->accumBlueBits =
 414          util_format_get_component_bits(visual->accum_format,
 415                UTIL_FORMAT_COLORSPACE_RGB, 2);
 416       mode->accumAlphaBits =
 417          util_format_get_component_bits(visual->accum_format,
 418                UTIL_FORMAT_COLORSPACE_RGB, 3);
 419    }
 420
 421    if (visual->samples > 1) {
 422       mode->sampleBuffers = 1;
 423       mode->samples = visual->samples;
 424    }
 425 }
 426
 427
 428 /**
 429  * Create a framebuffer from a manager interface.
 430  */
 431 static struct st_framebuffer *
 432 st_framebuffer_create(struct st_context *st,
 433                       struct st_framebuffer_iface *stfbi)
 434 {
 435    struct st_framebuffer *stfb;
 436    struct gl_config mode;
 437    gl_buffer_index idx;
 438
 439    if (!stfbi)
 440       return NULL;
 441
 442    stfb = CALLOC_STRUCT(st_framebuffer);
 443    if (!stfb)
 444       return NULL;
 445
 446    st_visual_to_context_mode(stfbi->visual, &mode);
 447
 448    /*
 449     * For desktop GL, sRGB framebuffer write is controlled by both the
 450     * capability of the framebuffer and GL_FRAMEBUFFER_SRGB.  We should
 451     * advertise the capability when the pipe driver (and core Mesa) supports
 452     * it so that applications can enable sRGB write when they want to.
 453     *
 454     * This is not to be confused with GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB.  When
 455     * the attribute is GLX_TRUE, it tells the st manager to pick a color
 456     * format such that util_format_srgb(visual->color_format) can be supported
 457     * by the pipe driver.  We still need to advertise the capability here.
 458     *
 459     * For GLES, however, sRGB framebuffer write is controlled only by the
 460     * capability of the framebuffer.  There is GL_EXT_sRGB_write_control to
 461     * give applications the control back, but sRGB write is still enabled by
 462     * default.  To avoid unexpected results, we should not advertise the
 463     * capability.  This could change when we add support for
 464     * EGL_KHR_gl_colorspace.
 465     */
 466    if (_mesa_is_desktop_gl(st->ctx)) {
 467       struct pipe_screen *screen = st->pipe->screen;
 468       const enum pipe_format srgb_format =
 469          util_format_srgb(stfbi->visual->color_format);
 470
 471       if (srgb_format != PIPE_FORMAT_NONE &&
 472           st_pipe_format_to_mesa_format(srgb_format) != MESA_FORMAT_NONE &&
 473           screen->is_format_supported(screen, srgb_format,
 474                                       PIPE_TEXTURE_2D, stfbi->visual->samples,
 475                                       stfbi->visual->samples,
 476                                       (PIPE_BIND_DISPLAY_TARGET |
 477                                        PIPE_BIND_RENDER_TARGET)))
 478          mode.sRGBCapable = GL_TRUE;
 479    }
 480
 481    _mesa_initialize_window_framebuffer(&stfb->Base, &mode);
 482
 483    stfb->iface = stfbi;
 484    stfb->iface_ID = stfbi->ID;
 485    stfb->iface_stamp = p_atomic_read(&stfbi->stamp) - 1;
 486
 487    /* add the color buffer */
 488    idx = stfb->Base._ColorDrawBufferIndexes[0];
 489    if (!st_framebuffer_add_renderbuffer(stfb, idx)) {
 490       free(stfb);
 491       return NULL;
 492    }
 493
 494    st_framebuffer_add_renderbuffer(stfb, BUFFER_DEPTH);
 495    st_framebuffer_add_renderbuffer(stfb, BUFFER_ACCUM);
 496
 497    stfb->stamp = 0;
 498    st_framebuffer_update_attachments(stfb);
 499
 500    return stfb;
 501 }
 502
 503
 504 /**
 505  * Reference a framebuffer.
 506  */
 507 void
 508 st_framebuffer_reference(struct st_framebuffer **ptr,
 509                          struct st_framebuffer *stfb)
 510 {
 511    struct gl_framebuffer *fb = &stfb->Base;
 512    _mesa_reference_framebuffer((struct gl_framebuffer **) ptr, fb);
 513 }
 514
 515
 516 static uint32_t
 517 st_framebuffer_iface_hash(const void *key)
 518 {
 519    return (uintptr_t)key;
 520 }
 521
 522
 523 static bool
 524 st_framebuffer_iface_equal(const void *a, const void *b)
 525 {
 526    return (struct st_framebuffer_iface *)a == (struct st_framebuffer_iface *)b;
 527 }
 528
 529
 530 static boolean
 531 st_framebuffer_iface_lookup(struct st_manager *smapi,
 532                             const struct st_framebuffer_iface *stfbi)
 533 {
 534    struct st_manager_private *smPriv =
 535       (struct st_manager_private *)smapi->st_manager_private;
 536    struct hash_entry *entry;
 537
 538    assert(smPriv);
 539    assert(smPriv->stfbi_ht);
 540
 541    mtx_lock(&smPriv->st_mutex);
 542    entry = _mesa_hash_table_search(smPriv->stfbi_ht, stfbi);
 543    mtx_unlock(&smPriv->st_mutex);
 544
 545    return entry != NULL;
 546 }
 547
 548
 549 static boolean
 550 st_framebuffer_iface_insert(struct st_manager *smapi,
 551                             struct st_framebuffer_iface *stfbi)
 552 {
 553    struct st_manager_private *smPriv =
 554       (struct st_manager_private *)smapi->st_manager_private;
 555    struct hash_entry *entry;
 556
 557    assert(smPriv);
 558    assert(smPriv->stfbi_ht);
 559
 560    mtx_lock(&smPriv->st_mutex);
 561    entry = _mesa_hash_table_insert(smPriv->stfbi_ht, stfbi, stfbi);
 562    mtx_unlock(&smPriv->st_mutex);
 563
 564    return entry != NULL;
 565 }
 566
 567
 568 static void
 569 st_framebuffer_iface_remove(struct st_manager *smapi,
 570                             struct st_framebuffer_iface *stfbi)
 571 {
 572    struct st_manager_private *smPriv =
 573       (struct st_manager_private *)smapi->st_manager_private;
 574    struct hash_entry *entry;
 575
 576    if (!smPriv || !smPriv->stfbi_ht)
 577       return;
 578
 579    mtx_lock(&smPriv->st_mutex);
 580    entry = _mesa_hash_table_search(smPriv->stfbi_ht, stfbi);
 581    if (!entry)
 582       goto unlock;
 583
 584    _mesa_hash_table_remove(smPriv->stfbi_ht, entry);
 585
 586 unlock:
 587    mtx_unlock(&smPriv->st_mutex);
 588 }
 589
 590
 591 /**
 592  * The framebuffer interface object is no longer valid.
 593  * Remove the object from the framebuffer interface hash table.
 594  */
 595 static void
 596 st_api_destroy_drawable(struct st_api *stapi,
 597                         struct st_framebuffer_iface *stfbi)
 598 {
 599    if (!stfbi)
 600       return;
 601
 602    st_framebuffer_iface_remove(stfbi->state_manager, stfbi);
 603 }
 604
 605
 606 /**
 607  * Purge the winsys buffers list to remove any references to
 608  * non-existing framebuffer interface objects.
 609  */
 610 static void
 611 st_framebuffers_purge(struct st_context *st)
 612 {
 613    struct st_context_iface *st_iface = &st->iface;
 614    struct st_manager *smapi = st_iface->state_manager;
 615    struct st_framebuffer *stfb, *next;
 616
 617    assert(smapi);
 618
 619    LIST_FOR_EACH_ENTRY_SAFE_REV(stfb, next, &st->winsys_buffers, head) {
 620       struct st_framebuffer_iface *stfbi = stfb->iface;
 621
 622       assert(stfbi);
 623
 624       /**
 625        * If the corresponding framebuffer interface object no longer exists,
 626        * remove the framebuffer object from the context's winsys buffers list,
 627        * and unreference the framebuffer object, so its resources can be
 628        * deleted.
 629        */
 630       if (!st_framebuffer_iface_lookup(smapi, stfbi)) {
 631          LIST_DEL(&stfb->head);
 632          st_framebuffer_reference(&stfb, NULL);
 633       }
 634    }
 635 }
 636
 637
 638 static void
 639 st_context_flush(struct st_context_iface *stctxi, unsigned flags,
 640                  struct pipe_fence_handle **fence)
 641 {
 642    struct st_context *st = (struct st_context *) stctxi;
 643    unsigned pipe_flags = 0;
 644
 645    if (flags & ST_FLUSH_END_OF_FRAME)
 646       pipe_flags |= PIPE_FLUSH_END_OF_FRAME;
 647    if (flags & ST_FLUSH_FENCE_FD)
 648       pipe_flags |= PIPE_FLUSH_FENCE_FD;
 649
 650    FLUSH_VERTICES(st->ctx, 0);
 651    FLUSH_CURRENT(st->ctx, 0);
 652    st_flush(st, fence, pipe_flags);
 653
 654    if ((flags & ST_FLUSH_WAIT) && fence && *fence) {
 655       st->pipe->screen->fence_finish(st->pipe->screen, NULL, *fence,
 656                                      PIPE_TIMEOUT_INFINITE);
 657       st->pipe->screen->fence_reference(st->pipe->screen, fence, NULL);
 658    }
 659
 660    if (flags & ST_FLUSH_FRONT)
 661       st_manager_flush_frontbuffer(st);
 662
 663    /* DRI3 changes the framebuffer after SwapBuffers, but we need to invoke
 664     * st_manager_validate_framebuffers to notice that.
 665     *
 666     * Set gfx_shaders_may_be_dirty to invoke st_validate_state in the next
 667     * draw call, which will invoke st_manager_validate_framebuffers, but it
 668     * won't dirty states if there is no change.
 669     */
 670    if (flags & ST_FLUSH_END_OF_FRAME)
 671       st->gfx_shaders_may_be_dirty = true;
 672 }
 673
 674 static boolean
 675 st_context_teximage(struct st_context_iface *stctxi,
 676                     enum st_texture_type tex_type,
 677                     int level, enum pipe_format pipe_format,
 678                     struct pipe_resource *tex, boolean mipmap)
 679 {
 680    struct st_context *st = (struct st_context *) stctxi;
 681    struct gl_context *ctx = st->ctx;
 682    struct gl_texture_object *texObj;
 683    struct gl_texture_image *texImage;
 684    struct st_texture_object *stObj;
 685    struct st_texture_image *stImage;
 686    GLenum internalFormat;
 687    GLuint width, height, depth;
 688    GLenum target;
 689
 690    switch (tex_type) {
 691    case ST_TEXTURE_1D:
 692       target = GL_TEXTURE_1D;
 693       break;
 694    case ST_TEXTURE_2D:
 695       target = GL_TEXTURE_2D;
 696       break;
 697    case ST_TEXTURE_3D:
 698       target = GL_TEXTURE_3D;
 699       break;
 700    case ST_TEXTURE_RECT:
 701       target = GL_TEXTURE_RECTANGLE_ARB;
 702       break;
 703    default:
 704       return FALSE;
 705    }
 706
 707    texObj = _mesa_get_current_tex_object(ctx, target);
 708
 709    _mesa_lock_texture(ctx, texObj);
 710
 711    stObj = st_texture_object(texObj);
 712    /* switch to surface based */
 713    if (!stObj->surface_based) {
 714       _mesa_clear_texture_object(ctx, texObj, NULL);
 715       stObj->surface_based = GL_TRUE;
 716    }
 717
 718    texImage = _mesa_get_tex_image(ctx, texObj, target, level);
 719    stImage = st_texture_image(texImage);
 720    if (tex) {
 721       mesa_format texFormat = st_pipe_format_to_mesa_format(pipe_format);
 722
 723       if (util_format_has_alpha(tex->format))
 724          internalFormat = GL_RGBA;
 725       else
 726          internalFormat = GL_RGB;
 727
 728       _mesa_init_teximage_fields(ctx, texImage,
 729                                  tex->width0, tex->height0, 1, 0,
 730                                  internalFormat, texFormat);
 731
 732       width = tex->width0;
 733       height = tex->height0;
 734       depth = tex->depth0;
 735
 736       /* grow the image size until we hit level = 0 */
 737       while (level > 0) {
 738          if (width != 1)
 739             width <<= 1;
 740          if (height != 1)
 741             height <<= 1;
 742          if (depth != 1)
 743             depth <<= 1;
 744          level--;
 745       }
 746    }
 747    else {
 748       _mesa_clear_texture_image(ctx, texImage);
 749       width = height = depth = 0;
 750    }
 751
 752    pipe_resource_reference(&stObj->pt, tex);
 753    st_texture_release_all_sampler_views(st, stObj);
 754    pipe_resource_reference(&stImage->pt, tex);
 755    stObj->surface_format = pipe_format;
 756
 757    stObj->needs_validation = true;
 758
 759    _mesa_dirty_texobj(ctx, texObj);
 760    _mesa_unlock_texture(ctx, texObj);
 761
 762    return TRUE;
 763 }
 764
 765
 766 static void
 767 st_context_copy(struct st_context_iface *stctxi,
 768                 struct st_context_iface *stsrci, unsigned mask)
 769 {
 770    struct st_context *st = (struct st_context *) stctxi;
 771    struct st_context *src = (struct st_context *) stsrci;
 772
 773    _mesa_copy_context(src->ctx, st->ctx, mask);
 774 }
 775
 776
 777 static boolean
 778 st_context_share(struct st_context_iface *stctxi,
 779                  struct st_context_iface *stsrci)
 780 {
 781    struct st_context *st = (struct st_context *) stctxi;
 782    struct st_context *src = (struct st_context *) stsrci;
 783
 784    return _mesa_share_state(st->ctx, src->ctx);
 785 }
 786
 787
 788 static void
 789 st_context_destroy(struct st_context_iface *stctxi)
 790 {
 791    struct st_context *st = (struct st_context *) stctxi;
 792    st_destroy_context(st);
 793 }
 794
 795
 796 static void
 797 st_start_thread(struct st_context_iface *stctxi)
 798 {
 799    struct st_context *st = (struct st_context *) stctxi;
 800
 801    _mesa_glthread_init(st->ctx);
 802 }
 803
 804
 805 static void
 806 st_thread_finish(struct st_context_iface *stctxi)
 807 {
 808    struct st_context *st = (struct st_context *) stctxi;
 809
 810    _mesa_glthread_finish(st->ctx);
 811 }
 812
 813
 814 static void
 815 st_manager_destroy(struct st_manager *smapi)
 816 {
 817    struct st_manager_private *smPriv = smapi->st_manager_private;
 818
 819    if (smPriv && smPriv->stfbi_ht) {
 820       _mesa_hash_table_destroy(smPriv->stfbi_ht, NULL);
 821       mtx_destroy(&smPriv->st_mutex);
 822       free(smPriv);
 823       smapi->st_manager_private = NULL;
 824    }
 825 }
 826
 827
 828 static struct st_context_iface *
 829 st_api_create_context(struct st_api *stapi, struct st_manager *smapi,
 830                       const struct st_context_attribs *attribs,
 831                       enum st_context_error *error,
 832                       struct st_context_iface *shared_stctxi)
 833 {
 834    struct st_context *shared_ctx = (struct st_context *) shared_stctxi;
 835    struct st_context *st;
 836    struct pipe_context *pipe;
 837    struct gl_config mode;
 838    gl_api api;
 839    bool no_error = false;
 840    unsigned ctx_flags = PIPE_CONTEXT_PREFER_THREADED;
 841
 842    if (!(stapi->profile_mask & (1 << attribs->profile)))
 843       return NULL;
 844
 845    switch (attribs->profile) {
 846    case ST_PROFILE_DEFAULT:
 847       api = API_OPENGL_COMPAT;
 848       break;
 849    case ST_PROFILE_OPENGL_ES1:
 850       api = API_OPENGLES;
 851       break;
 852    case ST_PROFILE_OPENGL_ES2:
 853       api = API_OPENGLES2;
 854       break;
 855    case ST_PROFILE_OPENGL_CORE:
 856       api = API_OPENGL_CORE;
 857       break;
 858    default:
 859       *error = ST_CONTEXT_ERROR_BAD_API;
 860       return NULL;
 861    }
 862
 863    /* Create a hash table for the framebuffer interface objects
 864     * if it has not been created for this st manager.
 865     */
 866    if (smapi->st_manager_private == NULL) {
 867       struct st_manager_private *smPriv;
 868
 869       smPriv = CALLOC_STRUCT(st_manager_private);
 870       mtx_init(&smPriv->st_mutex, mtx_plain);
 871       smPriv->stfbi_ht = _mesa_hash_table_create(NULL,
 872                                                  st_framebuffer_iface_hash,
 873                                                  st_framebuffer_iface_equal);
 874       smapi->st_manager_private = smPriv;
 875       smapi->destroy = st_manager_destroy;
 876    }
 877
 878    if (attribs->flags & ST_CONTEXT_FLAG_ROBUST_ACCESS)
 879       ctx_flags |= PIPE_CONTEXT_ROBUST_BUFFER_ACCESS;
 880
 881    if (attribs->flags & ST_CONTEXT_FLAG_NO_ERROR)
 882       no_error = true;
 883
 884    if (attribs->flags & ST_CONTEXT_FLAG_LOW_PRIORITY)
 885       ctx_flags |= PIPE_CONTEXT_LOW_PRIORITY;
 886    else if (attribs->flags & ST_CONTEXT_FLAG_HIGH_PRIORITY)
 887       ctx_flags |= PIPE_CONTEXT_HIGH_PRIORITY;
 888
 889    pipe = smapi->screen->context_create(smapi->screen, NULL, ctx_flags);
 890    if (!pipe) {
 891       *error = ST_CONTEXT_ERROR_NO_MEMORY;
 892       return NULL;
 893    }
 894
 895    st_visual_to_context_mode(&attribs->visual, &mode);
 896    st = st_create_context(api, pipe, &mode, shared_ctx,
 897                           &attribs->options, no_error);
 898    if (!st) {
 899       *error = ST_CONTEXT_ERROR_NO_MEMORY;
 900       pipe->destroy(pipe);
 901       return NULL;
 902    }
 903
 904    if (attribs->flags & ST_CONTEXT_FLAG_DEBUG) {
 905       if (!_mesa_set_debug_state_int(st->ctx, GL_DEBUG_OUTPUT, GL_TRUE)) {
 906          *error = ST_CONTEXT_ERROR_NO_MEMORY;
 907          return NULL;
 908       }
 909
 910       st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
 911    }
 912
 913    if (st->ctx->Const.ContextFlags & GL_CONTEXT_FLAG_DEBUG_BIT) {
 914       st_update_debug_callback(st);
 915    }
 916
 917    if (attribs->flags & ST_CONTEXT_FLAG_FORWARD_COMPATIBLE)
 918       st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
 919    if (attribs->flags & ST_CONTEXT_FLAG_ROBUST_ACCESS) {
 920       st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT_ARB;
 921       st->ctx->Const.RobustAccess = GL_TRUE;
 922    }
 923    if (attribs->flags & ST_CONTEXT_FLAG_RESET_NOTIFICATION_ENABLED) {
 924       st->ctx->Const.ResetStrategy = GL_LOSE_CONTEXT_ON_RESET_ARB;
 925       st_install_device_reset_callback(st);
 926    }
 927
 928    if (attribs->flags & ST_CONTEXT_FLAG_RELEASE_NONE)
 929        st->ctx->Const.ContextReleaseBehavior = GL_NONE;
 930
 931    /* need to perform version check */
 932    if (attribs->major > 1 || attribs->minor > 0) {
 933       /* Is the actual version less than the requested version?
 934        */
 935       if (st->ctx->Version < attribs->major * 10U + attribs->minor) {
 936          *error = ST_CONTEXT_ERROR_BAD_VERSION;
 937          st_destroy_context(st);
 938          return NULL;
 939       }
 940    }
 941
 942    st->invalidate_on_gl_viewport =
 943       smapi->get_param(smapi, ST_MANAGER_BROKEN_INVALIDATE);
 944
 945    st->iface.destroy = st_context_destroy;
 946    st->iface.flush = st_context_flush;
 947    st->iface.teximage = st_context_teximage;
 948    st->iface.copy = st_context_copy;
 949    st->iface.share = st_context_share;
 950    st->iface.start_thread = st_start_thread;
 951    st->iface.thread_finish = st_thread_finish;
 952    st->iface.st_context_private = (void *) smapi;
 953    st->iface.cso_context = st->cso_context;
 954    st->iface.pipe = st->pipe;
 955    st->iface.state_manager = smapi;
 956
 957    *error = ST_CONTEXT_SUCCESS;
 958    return &st->iface;
 959 }
 960
 961
 962 static struct st_context_iface *
 963 st_api_get_current(struct st_api *stapi)
 964 {
 965    GET_CURRENT_CONTEXT(ctx);
 966    struct st_context *st = ctx ? ctx->st : NULL;
 967
 968    return st ? &st->iface : NULL;
 969 }
 970
 971
 972 static struct st_framebuffer *
 973 st_framebuffer_reuse_or_create(struct st_context *st,
 974                                struct gl_framebuffer *fb,
 975                                struct st_framebuffer_iface *stfbi)
 976 {
 977    struct st_framebuffer *cur = NULL, *stfb = NULL;
 978
 979    if (!stfbi)
 980       return NULL;
 981
 982    /* Check if there is already a framebuffer object for the specified
 983     * framebuffer interface in this context. If there is one, use it.
 984     */
 985    LIST_FOR_EACH_ENTRY(cur, &st->winsys_buffers, head) {
 986       if (cur->iface_ID == stfbi->ID) {
 987          st_framebuffer_reference(&stfb, cur);
 988          break;
 989       }
 990    }
 991
 992    /* If there is not already a framebuffer object, create one */
 993    if (stfb == NULL) {
 994       cur = st_framebuffer_create(st, stfbi);
 995
 996       if (cur) {
 997          /* add the referenced framebuffer interface object to
 998           * the framebuffer interface object hash table.
 999           */
1000          if (!st_framebuffer_iface_insert(stfbi->state_manager, stfbi)) {
1001             st_framebuffer_reference(&cur, NULL);
1002             return NULL;
1003          }
1004
1005          /* add to the context's winsys buffers list */
1006          LIST_ADD(&cur->head, &st->winsys_buffers);
1007
1008          st_framebuffer_reference(&stfb, cur);
1009       }
1010    }
1011
1012    return stfb;
1013 }
1014
1015
1016 static boolean
1017 st_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
1018                     struct st_framebuffer_iface *stdrawi,
1019                     struct st_framebuffer_iface *streadi)
1020 {
1021    struct st_context *st = (struct st_context *) stctxi;
1022    struct st_framebuffer *stdraw, *stread;
1023    boolean ret;
1024
1025    _glapi_check_multithread();
1026
1027    if (st) {
1028       /* reuse or create the draw fb */
1029       stdraw = st_framebuffer_reuse_or_create(st,
1030             st->ctx->WinSysDrawBuffer, stdrawi);
1031       if (streadi != stdrawi) {
1032          /* do the same for the read fb */
1033          stread = st_framebuffer_reuse_or_create(st,
1034                st->ctx->WinSysReadBuffer, streadi);
1035       }
1036       else {
1037          stread = NULL;
1038          /* reuse the draw fb for the read fb */
1039          if (stdraw)
1040             st_framebuffer_reference(&stread, stdraw);
1041       }
1042
1043       if (stdraw && stread) {
1044          st_framebuffer_validate(stdraw, st);
1045          if (stread != stdraw)
1046             st_framebuffer_validate(stread, st);
1047
1048          ret = _mesa_make_current(st->ctx, &stdraw->Base, &stread->Base);
1049
1050          st->draw_stamp = stdraw->stamp - 1;
1051          st->read_stamp = stread->stamp - 1;
1052          st_context_validate(st, stdraw, stread);
1053       }
1054       else {
1055          struct gl_framebuffer *incomplete = _mesa_get_incomplete_framebuffer();
1056          ret = _mesa_make_current(st->ctx, incomplete, incomplete);
1057       }
1058
1059       st_framebuffer_reference(&stdraw, NULL);
1060       st_framebuffer_reference(&stread, NULL);
1061
1062       /* Purge the context's winsys_buffers list in case any
1063        * of the referenced drawables no longer exist.
1064        */
1065       st_framebuffers_purge(st);
1066    }
1067    else {
1068       ret = _mesa_make_current(NULL, NULL, NULL);
1069    }
1070
1071    return ret;
1072 }
1073
1074
1075 static void
1076 st_api_destroy(struct st_api *stapi)
1077 {
1078 }
1079
1080
1081 /**
1082  * Flush the front buffer if the current context renders to the front buffer.
1083  */
1084 void
1085 st_manager_flush_frontbuffer(struct st_context *st)
1086 {
1087    struct st_framebuffer *stfb = st_ws_framebuffer(st->ctx->DrawBuffer);
1088    struct st_renderbuffer *strb = NULL;
1089
1090    if (stfb)
1091       strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_FRONT_LEFT].
1092                              Renderbuffer);
1093
1094    /* Do we have a front color buffer and has it been drawn to since last
1095     * frontbuffer flush?
1096     */
1097    if (strb && strb->defined) {
1098       stfb->iface->flush_front(&st->iface, stfb->iface,
1099                                ST_ATTACHMENT_FRONT_LEFT);
1100       strb->defined = GL_FALSE;
1101
1102       /* Trigger an update of strb->defined on next draw */
1103       st->dirty |= ST_NEW_FB_STATE;
1104    }
1105 }
1106
1107
1108 /**
1109  * Re-validate the framebuffers.
1110  */
1111 void
1112 st_manager_validate_framebuffers(struct st_context *st)
1113 {
1114    struct st_framebuffer *stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);
1115    struct st_framebuffer *stread = st_ws_framebuffer(st->ctx->ReadBuffer);
1116
1117    if (stdraw)
1118       st_framebuffer_validate(stdraw, st);
1119    if (stread && stread != stdraw)
1120       st_framebuffer_validate(stread, st);
1121
1122    st_context_validate(st, stdraw, stread);
1123 }
1124
1125
1126 /**
1127  * Flush any outstanding swapbuffers on the current draw framebuffer.
1128  */
1129 void
1130 st_manager_flush_swapbuffers(void)
1131 {
1132    GET_CURRENT_CONTEXT(ctx);
1133    struct st_context *st = (ctx) ? ctx->st : NULL;
1134    struct st_framebuffer *stfb;
1135
1136    if (!st)
1137       return;
1138
1139    stfb = st_ws_framebuffer(ctx->DrawBuffer);
1140    if (!stfb || !stfb->iface->flush_swapbuffers)
1141       return;
1142
1143    stfb->iface->flush_swapbuffers(&st->iface, stfb->iface);
1144 }
1145
1146
1147 /**
1148  * Add a color renderbuffer on demand.  The FBO must correspond to a window,
1149  * not a user-created FBO.
1150  */
1151 boolean
1152 st_manager_add_color_renderbuffer(struct st_context *st,
1153                                   struct gl_framebuffer *fb,
1154                                   gl_buffer_index idx)
1155 {
1156    struct st_framebuffer *stfb = st_ws_framebuffer(fb);
1157
1158    /* FBO */
1159    if (!stfb)
1160       return FALSE;
1161
1162    assert(_mesa_is_winsys_fbo(fb));
1163
1164    if (stfb->Base.Attachment[idx].Renderbuffer)
1165       return TRUE;
1166
1167    switch (idx) {
1168    case BUFFER_FRONT_LEFT:
1169    case BUFFER_BACK_LEFT:
1170    case BUFFER_FRONT_RIGHT:
1171    case BUFFER_BACK_RIGHT:
1172       break;
1173    default:
1174       return FALSE;
1175    }
1176
1177    if (!st_framebuffer_add_renderbuffer(stfb, idx))
1178       return FALSE;
1179
1180    st_framebuffer_update_attachments(stfb);
1181
1182    /*
1183     * Force a call to the state tracker manager to validate the
1184     * new renderbuffer. It might be that there is a window system
1185     * renderbuffer available.
1186     */
1187    if (stfb->iface)
1188       stfb->iface_stamp = p_atomic_read(&stfb->iface->stamp) - 1;
1189
1190    st_invalidate_buffers(st);
1191
1192    return TRUE;
1193 }
1194
1195
1196 static unsigned
1197 get_version(struct pipe_screen *screen,
1198             struct st_config_options *options, gl_api api)
1199 {
1200    struct gl_constants consts = {0};
1201    struct gl_extensions extensions = {0};
1202    GLuint version;
1203
1204    if (_mesa_override_gl_version_contextless(&consts, &api, &version)) {
1205       return version;
1206    }
1207
1208    _mesa_init_constants(&consts, api);
1209    _mesa_init_extensions(&extensions);
1210
1211    st_init_limits(screen, &consts, &extensions, api);
1212    st_init_extensions(screen, &consts, &extensions, options, api);
1213
1214    return _mesa_get_version(&extensions, &consts, api);
1215 }
1216
1217
1218 static void
1219 st_api_query_versions(struct st_api *stapi, struct st_manager *sm,
1220                       struct st_config_options *options,
1221                       int *gl_core_version,
1222                       int *gl_compat_version,
1223                       int *gl_es1_version,
1224                       int *gl_es2_version)
1225 {
1226    *gl_core_version = get_version(sm->screen, options, API_OPENGL_CORE);
1227    *gl_compat_version = get_version(sm->screen, options, API_OPENGL_COMPAT);
1228    *gl_es1_version = get_version(sm->screen, options, API_OPENGLES);
1229    *gl_es2_version = get_version(sm->screen, options, API_OPENGLES2);
1230 }
1231
1232
1233 static const struct st_api st_gl_api = {
1234    .name = "Mesa " PACKAGE_VERSION,
1235    .api = ST_API_OPENGL,
1236    .profile_mask = ST_PROFILE_DEFAULT_MASK |
1237                    ST_PROFILE_OPENGL_CORE_MASK |
1238                    ST_PROFILE_OPENGL_ES1_MASK |
1239                    ST_PROFILE_OPENGL_ES2_MASK |
1240                    0,
1241    .feature_mask = ST_API_FEATURE_MS_VISUALS_MASK,
1242    .destroy = st_api_destroy,
1243    .query_versions = st_api_query_versions,
1244    .create_context = st_api_create_context,
1245    .make_current = st_api_make_current,
1246    .get_current = st_api_get_current,
1247    .destroy_drawable = st_api_destroy_drawable,
1248 };
1249
1250
1251 struct st_api *
1252 st_gl_api_create(void)
1253 {
1254    return (struct st_api *) &st_gl_api;
1255 }