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                                       (PIPE_BIND_DISPLAY_TARGET |
 476                                        PIPE_BIND_RENDER_TARGET)))
 477          mode.sRGBCapable = GL_TRUE;
 478    }
 479
 480    _mesa_initialize_window_framebuffer(&stfb->Base, &mode);
 481
 482    stfb->iface = stfbi;
 483    stfb->iface_ID = stfbi->ID;
 484    stfb->iface_stamp = p_atomic_read(&stfbi->stamp) - 1;
 485
 486    /* add the color buffer */
 487    idx = stfb->Base._ColorDrawBufferIndexes[0];
 488    if (!st_framebuffer_add_renderbuffer(stfb, idx)) {
 489       free(stfb);
 490       return NULL;
 491    }
 492
 493    st_framebuffer_add_renderbuffer(stfb, BUFFER_DEPTH);
 494    st_framebuffer_add_renderbuffer(stfb, BUFFER_ACCUM);
 495
 496    stfb->stamp = 0;
 497    st_framebuffer_update_attachments(stfb);
 498
 499    return stfb;
 500 }
 501
 502
 503 /**
 504  * Reference a framebuffer.
 505  */
 506 void
 507 st_framebuffer_reference(struct st_framebuffer **ptr,
 508                          struct st_framebuffer *stfb)
 509 {
 510    struct gl_framebuffer *fb = &stfb->Base;
 511    _mesa_reference_framebuffer((struct gl_framebuffer **) ptr, fb);
 512 }
 513
 514
 515 static uint32_t
 516 st_framebuffer_iface_hash(const void *key)
 517 {
 518    return (uintptr_t)key;
 519 }
 520
 521
 522 static bool
 523 st_framebuffer_iface_equal(const void *a, const void *b)
 524 {
 525    return (struct st_framebuffer_iface *)a == (struct st_framebuffer_iface *)b;
 526 }
 527
 528
 529 static boolean
 530 st_framebuffer_iface_lookup(struct st_manager *smapi,
 531                             const struct st_framebuffer_iface *stfbi)
 532 {
 533    struct st_manager_private *smPriv =
 534       (struct st_manager_private *)smapi->st_manager_private;
 535    struct hash_entry *entry;
 536
 537    assert(smPriv);
 538    assert(smPriv->stfbi_ht);
 539
 540    mtx_lock(&smPriv->st_mutex);
 541    entry = _mesa_hash_table_search(smPriv->stfbi_ht, stfbi);
 542    mtx_unlock(&smPriv->st_mutex);
 543
 544    return entry != NULL;
 545 }
 546
 547
 548 static boolean
 549 st_framebuffer_iface_insert(struct st_manager *smapi,
 550                             struct st_framebuffer_iface *stfbi)
 551 {
 552    struct st_manager_private *smPriv =
 553       (struct st_manager_private *)smapi->st_manager_private;
 554    struct hash_entry *entry;
 555
 556    assert(smPriv);
 557    assert(smPriv->stfbi_ht);
 558
 559    mtx_lock(&smPriv->st_mutex);
 560    entry = _mesa_hash_table_insert(smPriv->stfbi_ht, stfbi, stfbi);
 561    mtx_unlock(&smPriv->st_mutex);
 562
 563    return entry != NULL;
 564 }
 565
 566
 567 static void
 568 st_framebuffer_iface_remove(struct st_manager *smapi,
 569                             struct st_framebuffer_iface *stfbi)
 570 {
 571    struct st_manager_private *smPriv =
 572       (struct st_manager_private *)smapi->st_manager_private;
 573    struct hash_entry *entry;
 574
 575    if (!smPriv || !smPriv->stfbi_ht)
 576       return;
 577
 578    mtx_lock(&smPriv->st_mutex);
 579    entry = _mesa_hash_table_search(smPriv->stfbi_ht, stfbi);
 580    if (!entry)
 581       goto unlock;
 582
 583    _mesa_hash_table_remove(smPriv->stfbi_ht, entry);
 584
 585 unlock:
 586    mtx_unlock(&smPriv->st_mutex);
 587 }
 588
 589
 590 /**
 591  * The framebuffer interface object is no longer valid.
 592  * Remove the object from the framebuffer interface hash table.
 593  */
 594 static void
 595 st_api_destroy_drawable(struct st_api *stapi,
 596                         struct st_framebuffer_iface *stfbi)
 597 {
 598    if (!stfbi)
 599       return;
 600
 601    st_framebuffer_iface_remove(stfbi->state_manager, stfbi);
 602 }
 603
 604
 605 /**
 606  * Purge the winsys buffers list to remove any references to
 607  * non-existing framebuffer interface objects.
 608  */
 609 static void
 610 st_framebuffers_purge(struct st_context *st)
 611 {
 612    struct st_context_iface *st_iface = &st->iface;
 613    struct st_manager *smapi = st_iface->state_manager;
 614    struct st_framebuffer *stfb, *next;
 615
 616    assert(smapi);
 617
 618    LIST_FOR_EACH_ENTRY_SAFE_REV(stfb, next, &st->winsys_buffers, head) {
 619       struct st_framebuffer_iface *stfbi = stfb->iface;
 620
 621       assert(stfbi);
 622
 623       /**
 624        * If the corresponding framebuffer interface object no longer exists,
 625        * remove the framebuffer object from the context's winsys buffers list,
 626        * and unreference the framebuffer object, so its resources can be
 627        * deleted.
 628        */
 629       if (!st_framebuffer_iface_lookup(smapi, stfbi)) {
 630          LIST_DEL(&stfb->head);
 631          st_framebuffer_reference(&stfb, NULL);
 632       }
 633    }
 634 }
 635
 636
 637 static void
 638 st_context_flush(struct st_context_iface *stctxi, unsigned flags,
 639                  struct pipe_fence_handle **fence)
 640 {
 641    struct st_context *st = (struct st_context *) stctxi;
 642    unsigned pipe_flags = 0;
 643
 644    if (flags & ST_FLUSH_END_OF_FRAME)
 645       pipe_flags |= PIPE_FLUSH_END_OF_FRAME;
 646    if (flags & ST_FLUSH_FENCE_FD)
 647       pipe_flags |= PIPE_FLUSH_FENCE_FD;
 648
 649    FLUSH_VERTICES(st->ctx, 0);
 650    FLUSH_CURRENT(st->ctx, 0);
 651    st_flush(st, fence, pipe_flags);
 652
 653    if ((flags & ST_FLUSH_WAIT) && fence && *fence) {
 654       st->pipe->screen->fence_finish(st->pipe->screen, NULL, *fence,
 655                                      PIPE_TIMEOUT_INFINITE);
 656       st->pipe->screen->fence_reference(st->pipe->screen, fence, NULL);
 657    }
 658
 659    if (flags & ST_FLUSH_FRONT)
 660       st_manager_flush_frontbuffer(st);
 661
 662    /* DRI3 changes the framebuffer after SwapBuffers, but we need to invoke
 663     * st_manager_validate_framebuffers to notice that.
 664     *
 665     * Set gfx_shaders_may_be_dirty to invoke st_validate_state in the next
 666     * draw call, which will invoke st_manager_validate_framebuffers, but it
 667     * won't dirty states if there is no change.
 668     */
 669    if (flags & ST_FLUSH_END_OF_FRAME)
 670       st->gfx_shaders_may_be_dirty = true;
 671 }
 672
 673 static boolean
 674 st_context_teximage(struct st_context_iface *stctxi,
 675                     enum st_texture_type tex_type,
 676                     int level, enum pipe_format pipe_format,
 677                     struct pipe_resource *tex, boolean mipmap)
 678 {
 679    struct st_context *st = (struct st_context *) stctxi;
 680    struct gl_context *ctx = st->ctx;
 681    struct gl_texture_object *texObj;
 682    struct gl_texture_image *texImage;
 683    struct st_texture_object *stObj;
 684    struct st_texture_image *stImage;
 685    GLenum internalFormat;
 686    GLuint width, height, depth;
 687    GLenum target;
 688
 689    switch (tex_type) {
 690    case ST_TEXTURE_1D:
 691       target = GL_TEXTURE_1D;
 692       break;
 693    case ST_TEXTURE_2D:
 694       target = GL_TEXTURE_2D;
 695       break;
 696    case ST_TEXTURE_3D:
 697       target = GL_TEXTURE_3D;
 698       break;
 699    case ST_TEXTURE_RECT:
 700       target = GL_TEXTURE_RECTANGLE_ARB;
 701       break;
 702    default:
 703       return FALSE;
 704    }
 705
 706    texObj = _mesa_get_current_tex_object(ctx, target);
 707
 708    _mesa_lock_texture(ctx, texObj);
 709
 710    stObj = st_texture_object(texObj);
 711    /* switch to surface based */
 712    if (!stObj->surface_based) {
 713       _mesa_clear_texture_object(ctx, texObj, NULL);
 714       stObj->surface_based = GL_TRUE;
 715    }
 716
 717    texImage = _mesa_get_tex_image(ctx, texObj, target, level);
 718    stImage = st_texture_image(texImage);
 719    if (tex) {
 720       mesa_format texFormat = st_pipe_format_to_mesa_format(pipe_format);
 721
 722       if (util_format_has_alpha(tex->format))
 723          internalFormat = GL_RGBA;
 724       else
 725          internalFormat = GL_RGB;
 726
 727       _mesa_init_teximage_fields(ctx, texImage,
 728                                  tex->width0, tex->height0, 1, 0,
 729                                  internalFormat, texFormat);
 730
 731       width = tex->width0;
 732       height = tex->height0;
 733       depth = tex->depth0;
 734
 735       /* grow the image size until we hit level = 0 */
 736       while (level > 0) {
 737          if (width != 1)
 738             width <<= 1;
 739          if (height != 1)
 740             height <<= 1;
 741          if (depth != 1)
 742             depth <<= 1;
 743          level--;
 744       }
 745    }
 746    else {
 747       _mesa_clear_texture_image(ctx, texImage);
 748       width = height = depth = 0;
 749    }
 750
 751    pipe_resource_reference(&stObj->pt, tex);
 752    st_texture_release_all_sampler_views(st, stObj);
 753    pipe_resource_reference(&stImage->pt, tex);
 754    stObj->surface_format = pipe_format;
 755
 756    stObj->needs_validation = true;
 757
 758    _mesa_dirty_texobj(ctx, texObj);
 759    _mesa_unlock_texture(ctx, texObj);
 760
 761    return TRUE;
 762 }
 763
 764
 765 static void
 766 st_context_copy(struct st_context_iface *stctxi,
 767                 struct st_context_iface *stsrci, unsigned mask)
 768 {
 769    struct st_context *st = (struct st_context *) stctxi;
 770    struct st_context *src = (struct st_context *) stsrci;
 771
 772    _mesa_copy_context(src->ctx, st->ctx, mask);
 773 }
 774
 775
 776 static boolean
 777 st_context_share(struct st_context_iface *stctxi,
 778                  struct st_context_iface *stsrci)
 779 {
 780    struct st_context *st = (struct st_context *) stctxi;
 781    struct st_context *src = (struct st_context *) stsrci;
 782
 783    return _mesa_share_state(st->ctx, src->ctx);
 784 }
 785
 786
 787 static void
 788 st_context_destroy(struct st_context_iface *stctxi)
 789 {
 790    struct st_context *st = (struct st_context *) stctxi;
 791    st_destroy_context(st);
 792 }
 793
 794
 795 static void
 796 st_start_thread(struct st_context_iface *stctxi)
 797 {
 798    struct st_context *st = (struct st_context *) stctxi;
 799
 800    _mesa_glthread_init(st->ctx);
 801 }
 802
 803
 804 static void
 805 st_thread_finish(struct st_context_iface *stctxi)
 806 {
 807    struct st_context *st = (struct st_context *) stctxi;
 808
 809    _mesa_glthread_finish(st->ctx);
 810 }
 811
 812
 813 static void
 814 st_manager_destroy(struct st_manager *smapi)
 815 {
 816    struct st_manager_private *smPriv = smapi->st_manager_private;
 817
 818    if (smPriv && smPriv->stfbi_ht) {
 819       _mesa_hash_table_destroy(smPriv->stfbi_ht, NULL);
 820       mtx_destroy(&smPriv->st_mutex);
 821       free(smPriv);
 822       smapi->st_manager_private = NULL;
 823    }
 824 }
 825
 826
 827 static struct st_context_iface *
 828 st_api_create_context(struct st_api *stapi, struct st_manager *smapi,
 829                       const struct st_context_attribs *attribs,
 830                       enum st_context_error *error,
 831                       struct st_context_iface *shared_stctxi)
 832 {
 833    struct st_context *shared_ctx = (struct st_context *) shared_stctxi;
 834    struct st_context *st;
 835    struct pipe_context *pipe;
 836    struct gl_config mode;
 837    gl_api api;
 838    bool no_error = false;
 839    unsigned ctx_flags = PIPE_CONTEXT_PREFER_THREADED;
 840
 841    if (!(stapi->profile_mask & (1 << attribs->profile)))
 842       return NULL;
 843
 844    switch (attribs->profile) {
 845    case ST_PROFILE_DEFAULT:
 846       api = API_OPENGL_COMPAT;
 847       break;
 848    case ST_PROFILE_OPENGL_ES1:
 849       api = API_OPENGLES;
 850       break;
 851    case ST_PROFILE_OPENGL_ES2:
 852       api = API_OPENGLES2;
 853       break;
 854    case ST_PROFILE_OPENGL_CORE:
 855       api = API_OPENGL_CORE;
 856       break;
 857    default:
 858       *error = ST_CONTEXT_ERROR_BAD_API;
 859       return NULL;
 860    }
 861
 862    /* Create a hash table for the framebuffer interface objects
 863     * if it has not been created for this st manager.
 864     */
 865    if (smapi->st_manager_private == NULL) {
 866       struct st_manager_private *smPriv;
 867
 868       smPriv = CALLOC_STRUCT(st_manager_private);
 869       mtx_init(&smPriv->st_mutex, mtx_plain);
 870       smPriv->stfbi_ht = _mesa_hash_table_create(NULL,
 871                                                  st_framebuffer_iface_hash,
 872                                                  st_framebuffer_iface_equal);
 873       smapi->st_manager_private = smPriv;
 874       smapi->destroy = st_manager_destroy;
 875    }
 876
 877    if (attribs->flags & ST_CONTEXT_FLAG_ROBUST_ACCESS)
 878       ctx_flags |= PIPE_CONTEXT_ROBUST_BUFFER_ACCESS;
 879
 880    if (attribs->flags & ST_CONTEXT_FLAG_NO_ERROR)
 881       no_error = true;
 882
 883    if (attribs->flags & ST_CONTEXT_FLAG_LOW_PRIORITY)
 884       ctx_flags |= PIPE_CONTEXT_LOW_PRIORITY;
 885    else if (attribs->flags & ST_CONTEXT_FLAG_HIGH_PRIORITY)
 886       ctx_flags |= PIPE_CONTEXT_HIGH_PRIORITY;
 887
 888    pipe = smapi->screen->context_create(smapi->screen, NULL, ctx_flags);
 889    if (!pipe) {
 890       *error = ST_CONTEXT_ERROR_NO_MEMORY;
 891       return NULL;
 892    }
 893
 894    st_visual_to_context_mode(&attribs->visual, &mode);
 895    st = st_create_context(api, pipe, &mode, shared_ctx,
 896                           &attribs->options, no_error);
 897    if (!st) {
 898       *error = ST_CONTEXT_ERROR_NO_MEMORY;
 899       pipe->destroy(pipe);
 900       return NULL;
 901    }
 902
 903    if (attribs->flags & ST_CONTEXT_FLAG_DEBUG) {
 904       if (!_mesa_set_debug_state_int(st->ctx, GL_DEBUG_OUTPUT, GL_TRUE)) {
 905          *error = ST_CONTEXT_ERROR_NO_MEMORY;
 906          return NULL;
 907       }
 908
 909       st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
 910    }
 911
 912    if (st->ctx->Const.ContextFlags & GL_CONTEXT_FLAG_DEBUG_BIT) {
 913       st_update_debug_callback(st);
 914    }
 915
 916    if (attribs->flags & ST_CONTEXT_FLAG_FORWARD_COMPATIBLE)
 917       st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
 918    if (attribs->flags & ST_CONTEXT_FLAG_ROBUST_ACCESS) {
 919       st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT_ARB;
 920       st->ctx->Const.RobustAccess = GL_TRUE;
 921    }
 922    if (attribs->flags & ST_CONTEXT_FLAG_RESET_NOTIFICATION_ENABLED) {
 923       st->ctx->Const.ResetStrategy = GL_LOSE_CONTEXT_ON_RESET_ARB;
 924       st_install_device_reset_callback(st);
 925    }
 926
 927    if (attribs->flags & ST_CONTEXT_FLAG_RELEASE_NONE)
 928        st->ctx->Const.ContextReleaseBehavior = GL_NONE;
 929
 930    /* need to perform version check */
 931    if (attribs->major > 1 || attribs->minor > 0) {
 932       /* Is the actual version less than the requested version?
 933        */
 934       if (st->ctx->Version < attribs->major * 10U + attribs->minor) {
 935          *error = ST_CONTEXT_ERROR_BAD_VERSION;
 936          st_destroy_context(st);
 937          return NULL;
 938       }
 939    }
 940
 941    st->invalidate_on_gl_viewport =
 942       smapi->get_param(smapi, ST_MANAGER_BROKEN_INVALIDATE);
 943
 944    st->iface.destroy = st_context_destroy;
 945    st->iface.flush = st_context_flush;
 946    st->iface.teximage = st_context_teximage;
 947    st->iface.copy = st_context_copy;
 948    st->iface.share = st_context_share;
 949    st->iface.start_thread = st_start_thread;
 950    st->iface.thread_finish = st_thread_finish;
 951    st->iface.st_context_private = (void *) smapi;
 952    st->iface.cso_context = st->cso_context;
 953    st->iface.pipe = st->pipe;
 954    st->iface.state_manager = smapi;
 955
 956    *error = ST_CONTEXT_SUCCESS;
 957    return &st->iface;
 958 }
 959
 960
 961 static struct st_context_iface *
 962 st_api_get_current(struct st_api *stapi)
 963 {
 964    GET_CURRENT_CONTEXT(ctx);
 965    struct st_context *st = ctx ? ctx->st : NULL;
 966
 967    return st ? &st->iface : NULL;
 968 }
 969
 970
 971 static struct st_framebuffer *
 972 st_framebuffer_reuse_or_create(struct st_context *st,
 973                                struct gl_framebuffer *fb,
 974                                struct st_framebuffer_iface *stfbi)
 975 {
 976    struct st_framebuffer *cur = NULL, *stfb = NULL;
 977
 978    if (!stfbi)
 979       return NULL;
 980
 981    /* Check if there is already a framebuffer object for the specified
 982     * framebuffer interface in this context. If there is one, use it.
 983     */
 984    LIST_FOR_EACH_ENTRY(cur, &st->winsys_buffers, head) {
 985       if (cur->iface_ID == stfbi->ID) {
 986          st_framebuffer_reference(&stfb, cur);
 987          break;
 988       }
 989    }
 990
 991    /* If there is not already a framebuffer object, create one */
 992    if (stfb == NULL) {
 993       cur = st_framebuffer_create(st, stfbi);
 994
 995       if (cur) {
 996          /* add the referenced framebuffer interface object to
 997           * the framebuffer interface object hash table.
 998           */
 999          if (!st_framebuffer_iface_insert(stfbi->state_manager, stfbi)) {
1000             st_framebuffer_reference(&cur, NULL);
1001             return NULL;
1002          }
1003
1004          /* add to the context's winsys buffers list */
1005          LIST_ADD(&cur->head, &st->winsys_buffers);
1006
1007          st_framebuffer_reference(&stfb, cur);
1008       }
1009    }
1010
1011    return stfb;
1012 }
1013
1014
1015 static boolean
1016 st_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
1017                     struct st_framebuffer_iface *stdrawi,
1018                     struct st_framebuffer_iface *streadi)
1019 {
1020    struct st_context *st = (struct st_context *) stctxi;
1021    struct st_framebuffer *stdraw, *stread;
1022    boolean ret;
1023
1024    _glapi_check_multithread();
1025
1026    if (st) {
1027       /* reuse or create the draw fb */
1028       stdraw = st_framebuffer_reuse_or_create(st,
1029             st->ctx->WinSysDrawBuffer, stdrawi);
1030       if (streadi != stdrawi) {
1031          /* do the same for the read fb */
1032          stread = st_framebuffer_reuse_or_create(st,
1033                st->ctx->WinSysReadBuffer, streadi);
1034       }
1035       else {
1036          stread = NULL;
1037          /* reuse the draw fb for the read fb */
1038          if (stdraw)
1039             st_framebuffer_reference(&stread, stdraw);
1040       }
1041
1042       if (stdraw && stread) {
1043          st_framebuffer_validate(stdraw, st);
1044          if (stread != stdraw)
1045             st_framebuffer_validate(stread, st);
1046
1047          ret = _mesa_make_current(st->ctx, &stdraw->Base, &stread->Base);
1048
1049          st->draw_stamp = stdraw->stamp - 1;
1050          st->read_stamp = stread->stamp - 1;
1051          st_context_validate(st, stdraw, stread);
1052       }
1053       else {
1054          struct gl_framebuffer *incomplete = _mesa_get_incomplete_framebuffer();
1055          ret = _mesa_make_current(st->ctx, incomplete, incomplete);
1056       }
1057
1058       st_framebuffer_reference(&stdraw, NULL);
1059       st_framebuffer_reference(&stread, NULL);
1060
1061       /* Purge the context's winsys_buffers list in case any
1062        * of the referenced drawables no longer exist.
1063        */
1064       st_framebuffers_purge(st);
1065    }
1066    else {
1067       ret = _mesa_make_current(NULL, NULL, NULL);
1068    }
1069
1070    return ret;
1071 }
1072
1073
1074 static void
1075 st_api_destroy(struct st_api *stapi)
1076 {
1077 }
1078
1079
1080 /**
1081  * Flush the front buffer if the current context renders to the front buffer.
1082  */
1083 void
1084 st_manager_flush_frontbuffer(struct st_context *st)
1085 {
1086    struct st_framebuffer *stfb = st_ws_framebuffer(st->ctx->DrawBuffer);
1087    struct st_renderbuffer *strb = NULL;
1088
1089    if (stfb)
1090       strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_FRONT_LEFT].
1091                              Renderbuffer);
1092
1093    /* Do we have a front color buffer and has it been drawn to since last
1094     * frontbuffer flush?
1095     */
1096    if (strb && strb->defined) {
1097       stfb->iface->flush_front(&st->iface, stfb->iface,
1098                                ST_ATTACHMENT_FRONT_LEFT);
1099       strb->defined = GL_FALSE;
1100
1101       /* Trigger an update of strb->defined on next draw */
1102       st->dirty |= ST_NEW_FB_STATE;
1103    }
1104 }
1105
1106
1107 /**
1108  * Re-validate the framebuffers.
1109  */
1110 void
1111 st_manager_validate_framebuffers(struct st_context *st)
1112 {
1113    struct st_framebuffer *stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);
1114    struct st_framebuffer *stread = st_ws_framebuffer(st->ctx->ReadBuffer);
1115
1116    if (stdraw)
1117       st_framebuffer_validate(stdraw, st);
1118    if (stread && stread != stdraw)
1119       st_framebuffer_validate(stread, st);
1120
1121    st_context_validate(st, stdraw, stread);
1122 }
1123
1124
1125 /**
1126  * Flush any outstanding swapbuffers on the current draw framebuffer.
1127  */
1128 void
1129 st_manager_flush_swapbuffers(void)
1130 {
1131    GET_CURRENT_CONTEXT(ctx);
1132    struct st_context *st = (ctx) ? ctx->st : NULL;
1133    struct st_framebuffer *stfb;
1134
1135    if (!st)
1136       return;
1137
1138    stfb = st_ws_framebuffer(ctx->DrawBuffer);
1139    if (!stfb || !stfb->iface->flush_swapbuffers)
1140       return;
1141
1142    stfb->iface->flush_swapbuffers(&st->iface, stfb->iface);
1143 }
1144
1145
1146 /**
1147  * Add a color renderbuffer on demand.  The FBO must correspond to a window,
1148  * not a user-created FBO.
1149  */
1150 boolean
1151 st_manager_add_color_renderbuffer(struct st_context *st,
1152                                   struct gl_framebuffer *fb,
1153                                   gl_buffer_index idx)
1154 {
1155    struct st_framebuffer *stfb = st_ws_framebuffer(fb);
1156
1157    /* FBO */
1158    if (!stfb)
1159       return FALSE;
1160
1161    assert(_mesa_is_winsys_fbo(fb));
1162
1163    if (stfb->Base.Attachment[idx].Renderbuffer)
1164       return TRUE;
1165
1166    switch (idx) {
1167    case BUFFER_FRONT_LEFT:
1168    case BUFFER_BACK_LEFT:
1169    case BUFFER_FRONT_RIGHT:
1170    case BUFFER_BACK_RIGHT:
1171       break;
1172    default:
1173       return FALSE;
1174    }
1175
1176    if (!st_framebuffer_add_renderbuffer(stfb, idx))
1177       return FALSE;
1178
1179    st_framebuffer_update_attachments(stfb);
1180
1181    /*
1182     * Force a call to the state tracker manager to validate the
1183     * new renderbuffer. It might be that there is a window system
1184     * renderbuffer available.
1185     */
1186    if (stfb->iface)
1187       stfb->iface_stamp = p_atomic_read(&stfb->iface->stamp) - 1;
1188
1189    st_invalidate_buffers(st);
1190
1191    return TRUE;
1192 }
1193
1194
1195 static unsigned
1196 get_version(struct pipe_screen *screen,
1197             struct st_config_options *options, gl_api api)
1198 {
1199    struct gl_constants consts = {0};
1200    struct gl_extensions extensions = {0};
1201    GLuint version;
1202
1203    if (_mesa_override_gl_version_contextless(&consts, &api, &version)) {
1204       return version;
1205    }
1206
1207    _mesa_init_constants(&consts, api);
1208    _mesa_init_extensions(&extensions);
1209
1210    st_init_limits(screen, &consts, &extensions, api);
1211    st_init_extensions(screen, &consts, &extensions, options, api);
1212
1213    return _mesa_get_version(&extensions, &consts, api);
1214 }
1215
1216
1217 static void
1218 st_api_query_versions(struct st_api *stapi, struct st_manager *sm,
1219                       struct st_config_options *options,
1220                       int *gl_core_version,
1221                       int *gl_compat_version,
1222                       int *gl_es1_version,
1223                       int *gl_es2_version)
1224 {
1225    *gl_core_version = get_version(sm->screen, options, API_OPENGL_CORE);
1226    *gl_compat_version = get_version(sm->screen, options, API_OPENGL_COMPAT);
1227    *gl_es1_version = get_version(sm->screen, options, API_OPENGLES);
1228    *gl_es2_version = get_version(sm->screen, options, API_OPENGLES2);
1229 }
1230
1231
1232 static const struct st_api st_gl_api = {
1233    .name = "Mesa " PACKAGE_VERSION,
1234    .api = ST_API_OPENGL,
1235    .profile_mask = ST_PROFILE_DEFAULT_MASK |
1236                    ST_PROFILE_OPENGL_CORE_MASK |
1237                    ST_PROFILE_OPENGL_ES1_MASK |
1238                    ST_PROFILE_OPENGL_ES2_MASK |
1239                    0,
1240    .feature_mask = ST_API_FEATURE_MS_VISUALS_MASK,
1241    .destroy = st_api_destroy,
1242    .query_versions = st_api_query_versions,
1243    .create_context = st_api_create_context,
1244    .make_current = st_api_make_current,
1245    .get_current = st_api_get_current,
1246    .destroy_drawable = st_api_destroy_drawable,
1247 };
1248
1249
1250 struct st_api *
1251 st_gl_api_create(void)
1252 {
1253    return (struct st_api *) &st_gl_api;
1254 }