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