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/context.h"
  30 #include "main/texobj.h"
  31 #include "main/teximage.h"
  32 #include "main/texstate.h"
  33 #include "main/errors.h"
  34 #include "main/framebuffer.h"
  35 #include "main/fbobject.h"
  36 #include "main/renderbuffer.h"
  37 #include "main/version.h"
  38 #include "st_texture.h"
  39
  40 #include "st_context.h"
  41 #include "st_format.h"
  42 #include "st_cb_fbo.h"
  43 #include "st_cb_flush.h"
  44 #include "st_manager.h"
  45
  46 #include "state_tracker/st_gl_api.h"
  47
  48 #include "pipe/p_context.h"
  49 #include "pipe/p_screen.h"
  50 #include "util/u_format.h"
  51 #include "util/u_pointer.h"
  52 #include "util/u_inlines.h"
  53 #include "util/u_atomic.h"
  54 #include "util/u_surface.h"
  55
  56 /**
  57  * Cast wrapper to convert a struct gl_framebuffer to an st_framebuffer.
  58  * Return NULL if the struct gl_framebuffer is a user-created framebuffer.
  59  * We'll only return non-null for window system framebuffers.
  60  * Note that this function may fail.
  61  */
  62 static INLINE struct st_framebuffer *
  63 st_ws_framebuffer(struct gl_framebuffer *fb)
  64 {
  65    /* FBO cannot be casted.  See st_new_framebuffer */
  66    if (fb && _mesa_is_winsys_fbo(fb))
  67       return (struct st_framebuffer *) fb;
  68    return NULL;
  69 }
  70
  71 /**
  72  * Map an attachment to a buffer index.
  73  */
  74 static INLINE gl_buffer_index
  75 attachment_to_buffer_index(enum st_attachment_type statt)
  76 {
  77    gl_buffer_index index;
  78
  79    switch (statt) {
  80    case ST_ATTACHMENT_FRONT_LEFT:
  81       index = BUFFER_FRONT_LEFT;
  82       break;
  83    case ST_ATTACHMENT_BACK_LEFT:
  84       index = BUFFER_BACK_LEFT;
  85       break;
  86    case ST_ATTACHMENT_FRONT_RIGHT:
  87       index = BUFFER_FRONT_RIGHT;
  88       break;
  89    case ST_ATTACHMENT_BACK_RIGHT:
  90       index = BUFFER_BACK_RIGHT;
  91       break;
  92    case ST_ATTACHMENT_DEPTH_STENCIL:
  93       index = BUFFER_DEPTH;
  94       break;
  95    case ST_ATTACHMENT_ACCUM:
  96       index = BUFFER_ACCUM;
  97       break;
  98    case ST_ATTACHMENT_SAMPLE:
  99    default:
 100       index = BUFFER_COUNT;
 101       break;
 102    }
 103
 104    return index;
 105 }
 106
 107 /**
 108  * Map a buffer index to an attachment.
 109  */
 110 static INLINE enum st_attachment_type
 111 buffer_index_to_attachment(gl_buffer_index index)
 112 {
 113    enum st_attachment_type statt;
 114
 115    switch (index) {
 116    case BUFFER_FRONT_LEFT:
 117       statt = ST_ATTACHMENT_FRONT_LEFT;
 118       break;
 119    case BUFFER_BACK_LEFT:
 120       statt = ST_ATTACHMENT_BACK_LEFT;
 121       break;
 122    case BUFFER_FRONT_RIGHT:
 123       statt = ST_ATTACHMENT_FRONT_RIGHT;
 124       break;
 125    case BUFFER_BACK_RIGHT:
 126       statt = ST_ATTACHMENT_BACK_RIGHT;
 127       break;
 128    case BUFFER_DEPTH:
 129       statt = ST_ATTACHMENT_DEPTH_STENCIL;
 130       break;
 131    case BUFFER_ACCUM:
 132       statt = ST_ATTACHMENT_ACCUM;
 133       break;
 134    default:
 135       statt = ST_ATTACHMENT_INVALID;
 136       break;
 137    }
 138
 139    return statt;
 140 }
 141
 142 /**
 143  * Make sure a context picks up the latest cached state of the
 144  * drawables it binds to.
 145  */
 146 static void
 147 st_context_validate(struct st_context *st,
 148                     struct st_framebuffer *stdraw,
 149                     struct st_framebuffer *stread)
 150 {
 151     if (stdraw && stdraw->stamp != st->draw_stamp) {
 152        st->dirty.st |= ST_NEW_FRAMEBUFFER;
 153        _mesa_resize_framebuffer(st->ctx, &stdraw->Base,
 154                                 stdraw->Base.Width,
 155                                 stdraw->Base.Height);
 156        st->draw_stamp = stdraw->stamp;
 157     }
 158
 159     if (stread && stread->stamp != st->read_stamp) {
 160        if (stread != stdraw) {
 161           st->dirty.st |= ST_NEW_FRAMEBUFFER;
 162           _mesa_resize_framebuffer(st->ctx, &stread->Base,
 163                                    stread->Base.Width,
 164                                    stread->Base.Height);
 165        }
 166        st->read_stamp = stread->stamp;
 167     }
 168 }
 169
 170 /**
 171  * Validate a framebuffer to make sure up-to-date pipe_textures are used.
 172  * The context is only used for creating pipe surfaces and for calling
 173  * _mesa_resize_framebuffer().
 174  * (That should probably be rethought, since those surfaces become
 175  * drawable state, not context state, and can be freed by another pipe
 176  * context).
 177  */
 178 static void
 179 st_framebuffer_validate(struct st_framebuffer *stfb,
 180                         struct st_context *st)
 181 {
 182    struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
 183    uint width, height;
 184    unsigned i;
 185    boolean changed = FALSE;
 186    int32_t new_stamp;
 187
 188    /* Check for incomplete framebuffers (e.g. EGL_KHR_surfaceless_context) */
 189    if (!stfb->iface)
 190       return;
 191
 192    new_stamp = p_atomic_read(&stfb->iface->stamp);
 193    if (stfb->iface_stamp == new_stamp)
 194       return;
 195
 196    /* validate the fb */
 197    do {
 198       if (!stfb->iface->validate(&st->iface, stfb->iface, stfb->statts,
 199                                  stfb->num_statts, textures))
 200          return;
 201
 202       stfb->iface_stamp = new_stamp;
 203       new_stamp = p_atomic_read(&stfb->iface->stamp);
 204    } while(stfb->iface_stamp != new_stamp);
 205
 206    width = stfb->Base.Width;
 207    height = stfb->Base.Height;
 208
 209    for (i = 0; i < stfb->num_statts; i++) {
 210       struct st_renderbuffer *strb;
 211       struct pipe_surface *ps, surf_tmpl;
 212       gl_buffer_index idx;
 213
 214       if (!textures[i])
 215          continue;
 216
 217       idx = attachment_to_buffer_index(stfb->statts[i]);
 218       if (idx >= BUFFER_COUNT) {
 219          pipe_resource_reference(&textures[i], NULL);
 220          continue;
 221       }
 222
 223       strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);
 224       assert(strb);
 225       if (strb->texture == textures[i]) {
 226          pipe_resource_reference(&textures[i], NULL);
 227          continue;
 228       }
 229
 230       u_surface_default_template(&surf_tmpl, textures[i]);
 231       ps = st->pipe->create_surface(st->pipe, textures[i], &surf_tmpl);
 232       if (ps) {
 233          pipe_surface_reference(&strb->surface, ps);
 234          pipe_resource_reference(&strb->texture, ps->texture);
 235          /* ownership transfered */
 236          pipe_surface_reference(&ps, NULL);
 237
 238          changed = TRUE;
 239
 240          strb->Base.Width = strb->surface->width;
 241          strb->Base.Height = strb->surface->height;
 242
 243          width = strb->Base.Width;
 244          height = strb->Base.Height;
 245       }
 246
 247       pipe_resource_reference(&textures[i], NULL);
 248    }
 249
 250    if (changed) {
 251       ++stfb->stamp;
 252       _mesa_resize_framebuffer(st->ctx, &stfb->Base, width, height);
 253    }
 254 }
 255
 256 /**
 257  * Update the attachments to validate by looping the existing renderbuffers.
 258  */
 259 static void
 260 st_framebuffer_update_attachments(struct st_framebuffer *stfb)
 261 {
 262    gl_buffer_index idx;
 263
 264    stfb->num_statts = 0;
 265    for (idx = 0; idx < BUFFER_COUNT; idx++) {
 266       struct st_renderbuffer *strb;
 267       enum st_attachment_type statt;
 268
 269       strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);
 270       if (!strb || strb->software)
 271          continue;
 272
 273       statt = buffer_index_to_attachment(idx);
 274       if (statt != ST_ATTACHMENT_INVALID &&
 275           st_visual_have_buffers(stfb->iface->visual, 1 << statt))
 276          stfb->statts[stfb->num_statts++] = statt;
 277    }
 278    stfb->stamp++;
 279 }
 280
 281 /**
 282  * Add a renderbuffer to the framebuffer.
 283  */
 284 static boolean
 285 st_framebuffer_add_renderbuffer(struct st_framebuffer *stfb,
 286                                 gl_buffer_index idx)
 287 {
 288    struct gl_renderbuffer *rb;
 289    enum pipe_format format;
 290    boolean sw;
 291
 292    if (!stfb->iface)
 293       return FALSE;
 294
 295    /* do not distinguish depth/stencil buffers */
 296    if (idx == BUFFER_STENCIL)
 297       idx = BUFFER_DEPTH;
 298
 299    switch (idx) {
 300    case BUFFER_DEPTH:
 301       format = stfb->iface->visual->depth_stencil_format;
 302       sw = FALSE;
 303       break;
 304    case BUFFER_ACCUM:
 305       format = stfb->iface->visual->accum_format;
 306       sw = TRUE;
 307       break;
 308    default:
 309       format = stfb->iface->visual->color_format;
 310       if (stfb->Base.Visual.sRGBCapable)
 311          format = util_format_srgb(format);
 312       sw = FALSE;
 313       break;
 314    }
 315
 316    if (format == PIPE_FORMAT_NONE)
 317       return FALSE;
 318
 319    rb = st_new_renderbuffer_fb(format, stfb->iface->visual->samples, sw);
 320    if (!rb)
 321       return FALSE;
 322
 323    if (idx != BUFFER_DEPTH) {
 324       _mesa_add_renderbuffer(&stfb->Base, idx, rb);
 325    }
 326    else {
 327       if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 0))
 328          _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, rb);
 329       if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1))
 330          _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, rb);
 331    }
 332
 333    return TRUE;
 334 }
 335
 336 /**
 337  * Intialize a struct gl_config from a visual.
 338  */
 339 static void
 340 st_visual_to_context_mode(const struct st_visual *visual,
 341                           struct gl_config *mode)
 342 {
 343    memset(mode, 0, sizeof(*mode));
 344
 345    if (st_visual_have_buffers(visual, ST_ATTACHMENT_BACK_LEFT_MASK))
 346       mode->doubleBufferMode = GL_TRUE;
 347    if (st_visual_have_buffers(visual,
 348             ST_ATTACHMENT_FRONT_RIGHT_MASK | ST_ATTACHMENT_BACK_RIGHT_MASK))
 349       mode->stereoMode = GL_TRUE;
 350
 351    if (visual->color_format != PIPE_FORMAT_NONE) {
 352       mode->rgbMode = GL_TRUE;
 353
 354       mode->redBits =
 355          util_format_get_component_bits(visual->color_format,
 356                UTIL_FORMAT_COLORSPACE_RGB, 0);
 357       mode->greenBits =
 358          util_format_get_component_bits(visual->color_format,
 359                UTIL_FORMAT_COLORSPACE_RGB, 1);
 360       mode->blueBits =
 361          util_format_get_component_bits(visual->color_format,
 362                UTIL_FORMAT_COLORSPACE_RGB, 2);
 363       mode->alphaBits =
 364          util_format_get_component_bits(visual->color_format,
 365                UTIL_FORMAT_COLORSPACE_RGB, 3);
 366
 367       mode->rgbBits = mode->redBits +
 368          mode->greenBits + mode->blueBits + mode->alphaBits;
 369    }
 370
 371    if (visual->depth_stencil_format != PIPE_FORMAT_NONE) {
 372       mode->depthBits =
 373          util_format_get_component_bits(visual->depth_stencil_format,
 374                UTIL_FORMAT_COLORSPACE_ZS, 0);
 375       mode->stencilBits =
 376          util_format_get_component_bits(visual->depth_stencil_format,
 377                UTIL_FORMAT_COLORSPACE_ZS, 1);
 378
 379       mode->haveDepthBuffer = mode->depthBits > 0;
 380       mode->haveStencilBuffer = mode->stencilBits > 0;
 381    }
 382
 383    if (visual->accum_format != PIPE_FORMAT_NONE) {
 384       mode->haveAccumBuffer = GL_TRUE;
 385
 386       mode->accumRedBits =
 387          util_format_get_component_bits(visual->accum_format,
 388                UTIL_FORMAT_COLORSPACE_RGB, 0);
 389       mode->accumGreenBits =
 390          util_format_get_component_bits(visual->accum_format,
 391                UTIL_FORMAT_COLORSPACE_RGB, 1);
 392       mode->accumBlueBits =
 393          util_format_get_component_bits(visual->accum_format,
 394                UTIL_FORMAT_COLORSPACE_RGB, 2);
 395       mode->accumAlphaBits =
 396          util_format_get_component_bits(visual->accum_format,
 397                UTIL_FORMAT_COLORSPACE_RGB, 3);
 398    }
 399
 400    if (visual->samples > 1) {
 401       mode->sampleBuffers = 1;
 402       mode->samples = visual->samples;
 403    }
 404 }
 405
 406 /**
 407  * Create a framebuffer from a manager interface.
 408  */
 409 static struct st_framebuffer *
 410 st_framebuffer_create(struct st_context *st,
 411                       struct st_framebuffer_iface *stfbi)
 412 {
 413    struct st_framebuffer *stfb;
 414    struct gl_config mode;
 415    gl_buffer_index idx;
 416
 417    if (!stfbi)
 418       return NULL;
 419
 420    stfb = CALLOC_STRUCT(st_framebuffer);
 421    if (!stfb)
 422       return NULL;
 423
 424    st_visual_to_context_mode(stfbi->visual, &mode);
 425
 426    /*
 427     * For desktop GL, sRGB framebuffer write is controlled by both the
 428     * capability of the framebuffer and GL_FRAMEBUFFER_SRGB.  We should
 429     * advertise the capability when the pipe driver (and core Mesa) supports
 430     * it so that applications can enable sRGB write when they want to.
 431     *
 432     * This is not to be confused with GLX_FRAMEBUFFER_SRGB_CAPABLE_ARB.  When
 433     * the attribute is GLX_TRUE, it tells the st manager to pick a color
 434     * format such that util_format_srgb(visual->color_format) can be supported
 435     * by the pipe driver.  We still need to advertise the capability here.
 436     *
 437     * For GLES, however, sRGB framebuffer write is controlled only by the
 438     * capability of the framebuffer.  There is GL_EXT_sRGB_write_control to
 439     * give applications the control back, but sRGB write is still enabled by
 440     * default.  To avoid unexpected results, we should not advertise the
 441     * capability.  This could change when we add support for
 442     * EGL_KHR_gl_colorspace.
 443     */
 444    if (_mesa_is_desktop_gl(st->ctx)) {
 445       struct pipe_screen *screen = st->pipe->screen;
 446       const enum pipe_format srgb_format =
 447          util_format_srgb(stfbi->visual->color_format);
 448
 449       if (srgb_format != PIPE_FORMAT_NONE &&
 450           st_pipe_format_to_mesa_format(srgb_format) != MESA_FORMAT_NONE &&
 451           screen->is_format_supported(screen, srgb_format,
 452                                       PIPE_TEXTURE_2D, stfbi->visual->samples,
 453                                       PIPE_BIND_RENDER_TARGET))
 454          mode.sRGBCapable = GL_TRUE;
 455    }
 456
 457    _mesa_initialize_window_framebuffer(&stfb->Base, &mode);
 458
 459    stfb->iface = stfbi;
 460    stfb->iface_stamp = p_atomic_read(&stfbi->stamp) - 1;
 461
 462    /* add the color buffer */
 463    idx = stfb->Base._ColorDrawBufferIndexes[0];
 464    if (!st_framebuffer_add_renderbuffer(stfb, idx)) {
 465       free(stfb);
 466       return NULL;
 467    }
 468
 469    st_framebuffer_add_renderbuffer(stfb, BUFFER_DEPTH);
 470    st_framebuffer_add_renderbuffer(stfb, BUFFER_ACCUM);
 471
 472    stfb->stamp = 0;
 473    st_framebuffer_update_attachments(stfb);
 474
 475    return stfb;
 476 }
 477
 478 /**
 479  * Reference a framebuffer.
 480  */
 481 static void
 482 st_framebuffer_reference(struct st_framebuffer **ptr,
 483                          struct st_framebuffer *stfb)
 484 {
 485    struct gl_framebuffer *fb = &stfb->Base;
 486    _mesa_reference_framebuffer((struct gl_framebuffer **) ptr, fb);
 487 }
 488
 489 static void
 490 st_context_flush(struct st_context_iface *stctxi, unsigned flags,
 491                  struct pipe_fence_handle **fence)
 492 {
 493    struct st_context *st = (struct st_context *) stctxi;
 494    unsigned pipe_flags = 0;
 495
 496    if (flags & ST_FLUSH_END_OF_FRAME) {
 497       pipe_flags |= PIPE_FLUSH_END_OF_FRAME;
 498    }
 499
 500    st_flush(st, fence, pipe_flags);
 501    if (flags & ST_FLUSH_FRONT)
 502       st_manager_flush_frontbuffer(st);
 503 }
 504
 505 static boolean
 506 st_context_teximage(struct st_context_iface *stctxi,
 507                     enum st_texture_type tex_type,
 508                     int level, enum pipe_format pipe_format,
 509                     struct pipe_resource *tex, boolean mipmap)
 510 {
 511    struct st_context *st = (struct st_context *) stctxi;
 512    struct gl_context *ctx = st->ctx;
 513    struct gl_texture_object *texObj;
 514    struct gl_texture_image *texImage;
 515    struct st_texture_object *stObj;
 516    struct st_texture_image *stImage;
 517    GLenum internalFormat;
 518    GLuint width, height, depth;
 519    GLenum target;
 520
 521    switch (tex_type) {
 522    case ST_TEXTURE_1D:
 523       target = GL_TEXTURE_1D;
 524       break;
 525    case ST_TEXTURE_2D:
 526       target = GL_TEXTURE_2D;
 527       break;
 528    case ST_TEXTURE_3D:
 529       target = GL_TEXTURE_3D;
 530       break;
 531    case ST_TEXTURE_RECT:
 532       target = GL_TEXTURE_RECTANGLE_ARB;
 533       break;
 534    default:
 535       return FALSE;
 536    }
 537
 538    texObj = _mesa_get_current_tex_object(ctx, target);
 539
 540    _mesa_lock_texture(ctx, texObj);
 541
 542    stObj = st_texture_object(texObj);
 543    /* switch to surface based */
 544    if (!stObj->surface_based) {
 545       _mesa_clear_texture_object(ctx, texObj);
 546       stObj->surface_based = GL_TRUE;
 547    }
 548
 549    texImage = _mesa_get_tex_image(ctx, texObj, target, level);
 550    stImage = st_texture_image(texImage);
 551    if (tex) {
 552       mesa_format texFormat = st_pipe_format_to_mesa_format(pipe_format);
 553
 554       if (util_format_has_alpha(tex->format))
 555          internalFormat = GL_RGBA;
 556       else
 557          internalFormat = GL_RGB;
 558
 559       _mesa_init_teximage_fields(ctx, texImage,
 560                                  tex->width0, tex->height0, 1, 0,
 561                                  internalFormat, texFormat);
 562
 563       width = tex->width0;
 564       height = tex->height0;
 565       depth = tex->depth0;
 566
 567       /* grow the image size until we hit level = 0 */
 568       while (level > 0) {
 569          if (width != 1)
 570             width <<= 1;
 571          if (height != 1)
 572             height <<= 1;
 573          if (depth != 1)
 574             depth <<= 1;
 575          level--;
 576       }
 577    }
 578    else {
 579       _mesa_clear_texture_image(ctx, texImage);
 580       width = height = depth = 0;
 581    }
 582
 583    pipe_resource_reference(&stImage->pt, tex);
 584    stObj->width0 = width;
 585    stObj->height0 = height;
 586    stObj->depth0 = depth;
 587    stObj->surface_format = pipe_format;
 588
 589    _mesa_dirty_texobj(ctx, texObj);
 590    _mesa_unlock_texture(ctx, texObj);
 591
 592    return TRUE;
 593 }
 594
 595 static void
 596 st_context_copy(struct st_context_iface *stctxi,
 597                 struct st_context_iface *stsrci, unsigned mask)
 598 {
 599    struct st_context *st = (struct st_context *) stctxi;
 600    struct st_context *src = (struct st_context *) stsrci;
 601
 602    _mesa_copy_context(src->ctx, st->ctx, mask);
 603 }
 604
 605 static boolean
 606 st_context_share(struct st_context_iface *stctxi,
 607                  struct st_context_iface *stsrci)
 608 {
 609    struct st_context *st = (struct st_context *) stctxi;
 610    struct st_context *src = (struct st_context *) stsrci;
 611
 612    return _mesa_share_state(st->ctx, src->ctx);
 613 }
 614
 615 static void
 616 st_context_destroy(struct st_context_iface *stctxi)
 617 {
 618    struct st_context *st = (struct st_context *) stctxi;
 619    st_destroy_context(st);
 620 }
 621
 622 static struct st_context_iface *
 623 st_api_create_context(struct st_api *stapi, struct st_manager *smapi,
 624                       const struct st_context_attribs *attribs,
 625                       enum st_context_error *error,
 626                       struct st_context_iface *shared_stctxi)
 627 {
 628    struct st_context *shared_ctx = (struct st_context *) shared_stctxi;
 629    struct st_context *st;
 630    struct pipe_context *pipe;
 631    struct gl_config mode;
 632    gl_api api;
 633
 634    if (!(stapi->profile_mask & (1 << attribs->profile)))
 635       return NULL;
 636
 637    switch (attribs->profile) {
 638    case ST_PROFILE_DEFAULT:
 639       api = API_OPENGL_COMPAT;
 640       break;
 641    case ST_PROFILE_OPENGL_ES1:
 642       api = API_OPENGLES;
 643       break;
 644    case ST_PROFILE_OPENGL_ES2:
 645       api = API_OPENGLES2;
 646       break;
 647    case ST_PROFILE_OPENGL_CORE:
 648       api = API_OPENGL_CORE;
 649       break;
 650    default:
 651       *error = ST_CONTEXT_ERROR_BAD_API;
 652       return NULL;
 653       break;
 654    }
 655
 656    pipe = smapi->screen->context_create(smapi->screen, NULL);
 657    if (!pipe) {
 658       *error = ST_CONTEXT_ERROR_NO_MEMORY;
 659       return NULL;
 660    }
 661
 662    st_visual_to_context_mode(&attribs->visual, &mode);
 663    st = st_create_context(api, pipe, &mode, shared_ctx, &attribs->options);
 664    if (!st) {
 665       *error = ST_CONTEXT_ERROR_NO_MEMORY;
 666       pipe->destroy(pipe);
 667       return NULL;
 668    }
 669
 670    if (attribs->flags & ST_CONTEXT_FLAG_DEBUG){
 671       if (!_mesa_set_debug_state_int(st->ctx, GL_DEBUG_OUTPUT, GL_TRUE)) {
 672          *error = ST_CONTEXT_ERROR_NO_MEMORY;
 673          return NULL;
 674       }
 675       st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
 676    }
 677
 678    if (attribs->flags & ST_CONTEXT_FLAG_FORWARD_COMPATIBLE)
 679       st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
 680
 681    /* need to perform version check */
 682    if (attribs->major > 1 || attribs->minor > 0) {
 683       /* Is the actual version less than the requested version?
 684        */
 685       if (st->ctx->Version < attribs->major * 10 + attribs->minor) {
 686          *error = ST_CONTEXT_ERROR_BAD_VERSION;
 687          st_destroy_context(st);
 688          return NULL;
 689       }
 690    }
 691
 692    st->invalidate_on_gl_viewport =
 693       smapi->get_param(smapi, ST_MANAGER_BROKEN_INVALIDATE);
 694
 695    st->iface.destroy = st_context_destroy;
 696    st->iface.flush = st_context_flush;
 697    st->iface.teximage = st_context_teximage;
 698    st->iface.copy = st_context_copy;
 699    st->iface.share = st_context_share;
 700    st->iface.st_context_private = (void *) smapi;
 701    st->iface.cso_context = st->cso_context;
 702    st->iface.pipe = st->pipe;
 703
 704    *error = ST_CONTEXT_SUCCESS;
 705    return &st->iface;
 706 }
 707
 708 static struct st_context_iface *
 709 st_api_get_current(struct st_api *stapi)
 710 {
 711    GET_CURRENT_CONTEXT(ctx);
 712    struct st_context *st = (ctx) ? ctx->st : NULL;
 713
 714    return (st) ? &st->iface : NULL;
 715 }
 716
 717 static struct st_framebuffer *
 718 st_framebuffer_reuse_or_create(struct st_context *st,
 719                                struct gl_framebuffer *fb,
 720                                struct st_framebuffer_iface *stfbi)
 721 {
 722    struct st_framebuffer *cur = st_ws_framebuffer(fb), *stfb = NULL;
 723
 724    /* dummy framebuffers cant be used as st_framebuffer */
 725    if (cur && &cur->Base != _mesa_get_incomplete_framebuffer() &&
 726        cur->iface == stfbi) {
 727       /* reuse the current stfb */
 728       st_framebuffer_reference(&stfb, cur);
 729    }
 730    else {
 731       /* create a new one */
 732       stfb = st_framebuffer_create(st, stfbi);
 733    }
 734
 735    return stfb;
 736 }
 737
 738 static boolean
 739 st_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
 740                     struct st_framebuffer_iface *stdrawi,
 741                     struct st_framebuffer_iface *streadi)
 742 {
 743    struct st_context *st = (struct st_context *) stctxi;
 744    struct st_framebuffer *stdraw, *stread;
 745    boolean ret;
 746
 747    _glapi_check_multithread();
 748
 749    if (st) {
 750       /* reuse or create the draw fb */
 751       stdraw = st_framebuffer_reuse_or_create(st,
 752             st->ctx->WinSysDrawBuffer, stdrawi);
 753       if (streadi != stdrawi) {
 754          /* do the same for the read fb */
 755          stread = st_framebuffer_reuse_or_create(st,
 756                st->ctx->WinSysReadBuffer, streadi);
 757       }
 758       else {
 759          stread = NULL;
 760          /* reuse the draw fb for the read fb */
 761          if (stdraw)
 762             st_framebuffer_reference(&stread, stdraw);
 763       }
 764
 765       if (stdraw && stread) {
 766          st_framebuffer_validate(stdraw, st);
 767          if (stread != stdraw)
 768             st_framebuffer_validate(stread, st);
 769
 770          ret = _mesa_make_current(st->ctx, &stdraw->Base, &stread->Base);
 771
 772          st->draw_stamp = stdraw->stamp - 1;
 773          st->read_stamp = stread->stamp - 1;
 774          st_context_validate(st, stdraw, stread);
 775       }
 776       else {
 777          struct gl_framebuffer *incomplete = _mesa_get_incomplete_framebuffer();
 778          ret = _mesa_make_current(st->ctx, incomplete, incomplete);
 779       }
 780
 781       st_framebuffer_reference(&stdraw, NULL);
 782       st_framebuffer_reference(&stread, NULL);
 783    }
 784    else {
 785       ret = _mesa_make_current(NULL, NULL, NULL);
 786    }
 787
 788    return ret;
 789 }
 790
 791 static st_proc_t
 792 st_api_get_proc_address(struct st_api *stapi, const char *procname)
 793 {
 794    return (st_proc_t) _glapi_get_proc_address(procname);
 795 }
 796
 797 static void
 798 st_api_destroy(struct st_api *stapi)
 799 {
 800 }
 801
 802 /**
 803  * Flush the front buffer if the current context renders to the front buffer.
 804  */
 805 void
 806 st_manager_flush_frontbuffer(struct st_context *st)
 807 {
 808    struct st_framebuffer *stfb = st_ws_framebuffer(st->ctx->DrawBuffer);
 809    struct st_renderbuffer *strb = NULL;
 810
 811    if (stfb)
 812       strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
 813    if (!strb)
 814       return;
 815
 816    /* never a dummy fb */
 817    assert(&stfb->Base != _mesa_get_incomplete_framebuffer());
 818    stfb->iface->flush_front(&st->iface, stfb->iface, ST_ATTACHMENT_FRONT_LEFT);
 819 }
 820
 821 /**
 822  * Return the surface of an EGLImage.
 823  * FIXME: I think this should operate on resources, not surfaces
 824  */
 825 struct pipe_surface *
 826 st_manager_get_egl_image_surface(struct st_context *st, void *eglimg)
 827 {
 828    struct st_manager *smapi =
 829       (struct st_manager *) st->iface.st_context_private;
 830    struct st_egl_image stimg;
 831    struct pipe_surface *ps, surf_tmpl;
 832
 833    if (!smapi || !smapi->get_egl_image)
 834       return NULL;
 835
 836    memset(&stimg, 0, sizeof(stimg));
 837    if (!smapi->get_egl_image(smapi, eglimg, &stimg))
 838       return NULL;
 839
 840    u_surface_default_template(&surf_tmpl, stimg.texture);
 841    surf_tmpl.u.tex.level = stimg.level;
 842    surf_tmpl.u.tex.first_layer = stimg.layer;
 843    surf_tmpl.u.tex.last_layer = stimg.layer;
 844    ps = st->pipe->create_surface(st->pipe, stimg.texture, &surf_tmpl);
 845    pipe_resource_reference(&stimg.texture, NULL);
 846
 847    return ps;
 848 }
 849
 850 /**
 851  * Re-validate the framebuffers.
 852  */
 853 void
 854 st_manager_validate_framebuffers(struct st_context *st)
 855 {
 856    struct st_framebuffer *stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);
 857    struct st_framebuffer *stread = st_ws_framebuffer(st->ctx->ReadBuffer);
 858
 859    if (stdraw)
 860       st_framebuffer_validate(stdraw, st);
 861    if (stread && stread != stdraw)
 862       st_framebuffer_validate(stread, st);
 863
 864    st_context_validate(st, stdraw, stread);
 865 }
 866
 867 /**
 868  * Add a color renderbuffer on demand.
 869  */
 870 boolean
 871 st_manager_add_color_renderbuffer(struct st_context *st,
 872                                   struct gl_framebuffer *fb,
 873                                   gl_buffer_index idx)
 874 {
 875    struct st_framebuffer *stfb = st_ws_framebuffer(fb);
 876
 877    /* FBO */
 878    if (!stfb)
 879       return FALSE;
 880
 881    if (stfb->Base.Attachment[idx].Renderbuffer)
 882       return TRUE;
 883
 884    switch (idx) {
 885    case BUFFER_FRONT_LEFT:
 886    case BUFFER_BACK_LEFT:
 887    case BUFFER_FRONT_RIGHT:
 888    case BUFFER_BACK_RIGHT:
 889       break;
 890    default:
 891       return FALSE;
 892       break;
 893    }
 894
 895    if (!st_framebuffer_add_renderbuffer(stfb, idx))
 896       return FALSE;
 897
 898    st_framebuffer_update_attachments(stfb);
 899
 900    /*
 901     * Force a call to the state tracker manager to validate the
 902     * new renderbuffer. It might be that there is a window system
 903     * renderbuffer available.
 904     */
 905    if(stfb->iface)
 906       stfb->iface_stamp = p_atomic_read(&stfb->iface->stamp) - 1;
 907
 908    st_invalidate_state(st->ctx, _NEW_BUFFERS);
 909
 910    return TRUE;
 911 }
 912
 913 static void
 914 st_api_query_versions(struct st_api *stapi, struct st_manager *sm,
 915                       int *gl_core_version,
 916                       int *gl_compat_version,
 917                       int *gl_es1_version,
 918                       int *gl_es2_version)
 919 {
 920    *gl_core_version = 33;
 921    *gl_compat_version = 30;
 922    *gl_es1_version = 11;
 923    *gl_es2_version = 30;
 924 }
 925
 926 static const struct st_api st_gl_api = {
 927    "Mesa " PACKAGE_VERSION,
 928    ST_API_OPENGL,
 929    ST_PROFILE_DEFAULT_MASK |
 930    ST_PROFILE_OPENGL_CORE_MASK |
 931    ST_PROFILE_OPENGL_ES1_MASK |
 932    ST_PROFILE_OPENGL_ES2_MASK |
 933    0,
 934    ST_API_FEATURE_MS_VISUALS_MASK,
 935    st_api_destroy,
 936    st_api_query_versions,
 937    st_api_get_proc_address,
 938    st_api_create_context,
 939    st_api_make_current,
 940    st_api_get_current,
 941 };
 942
 943 struct st_api *
 944 st_gl_api_create(void)
 945 {
 946    return (struct st_api *) &st_gl_api;
 947 }