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