src/mesa/state_tracker/st_manager.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.9
   4  *
   5  * Copyright (C) 2010 LunarG Inc.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Chia-I Wu <olv@lunarg.com>
  27  */
  28
  29 #include "state_tracker/st_gl_api.h"
  30
  31 #include "pipe/p_context.h"
  32 #include "pipe/p_screen.h"
  33 #include "util/u_format.h"
  34 #include "util/u_pointer.h"
  35 #include "util/u_inlines.h"
  36 #include "util/u_atomic.h"
  37
  38 #include "main/mtypes.h"
  39 #include "main/context.h"
  40 #include "main/texobj.h"
  41 #include "main/teximage.h"
  42 #include "main/texstate.h"
  43 #include "main/texfetch.h"
  44 #include "main/framebuffer.h"
  45 #include "main/fbobject.h"
  46 #include "main/renderbuffer.h"
  47 #include "st_texture.h"
  48
  49 #include "st_context.h"
  50 #include "st_format.h"
  51 #include "st_cb_fbo.h"
  52 #include "st_cb_flush.h"
  53 #include "st_manager.h"
  54
  55 /**
  56  * Cast wrapper to convert a GLframebuffer to an st_framebuffer.
  57  * Return NULL if the GLframebuffer is a user-created framebuffer.
  58  * We'll only return non-null for window system framebuffers.
  59  * Note that this function may fail.
  60  */
  61 static INLINE struct st_framebuffer *
  62 st_ws_framebuffer(GLframebuffer *fb)
  63 {
  64    /* FBO cannot be casted.  See st_new_framebuffer */
  65    return (struct st_framebuffer *) ((fb && !fb->Name) ? fb : NULL);
  66 }
  67
  68 /**
  69  * Map an attachment to a buffer index.
  70  */
  71 static INLINE gl_buffer_index
  72 attachment_to_buffer_index(enum st_attachment_type statt)
  73 {
  74    gl_buffer_index index;
  75
  76    switch (statt) {
  77    case ST_ATTACHMENT_FRONT_LEFT:
  78       index = BUFFER_FRONT_LEFT;
  79       break;
  80    case ST_ATTACHMENT_BACK_LEFT:
  81       index = BUFFER_BACK_LEFT;
  82       break;
  83    case ST_ATTACHMENT_FRONT_RIGHT:
  84       index = BUFFER_FRONT_RIGHT;
  85       break;
  86    case ST_ATTACHMENT_BACK_RIGHT:
  87       index = BUFFER_BACK_RIGHT;
  88       break;
  89    case ST_ATTACHMENT_DEPTH_STENCIL:
  90       index = BUFFER_DEPTH;
  91       break;
  92    case ST_ATTACHMENT_ACCUM:
  93       index = BUFFER_ACCUM;
  94       break;
  95    case ST_ATTACHMENT_SAMPLE:
  96    default:
  97       index = BUFFER_COUNT;
  98       break;
  99    }
 100
 101    return index;
 102 }
 103
 104 /**
 105  * Map a buffer index to an attachment.
 106  */
 107 static INLINE enum st_attachment_type
 108 buffer_index_to_attachment(gl_buffer_index index)
 109 {
 110    enum st_attachment_type statt;
 111
 112    switch (index) {
 113    case BUFFER_FRONT_LEFT:
 114       statt = ST_ATTACHMENT_FRONT_LEFT;
 115       break;
 116    case BUFFER_BACK_LEFT:
 117       statt = ST_ATTACHMENT_BACK_LEFT;
 118       break;
 119    case BUFFER_FRONT_RIGHT:
 120       statt = ST_ATTACHMENT_FRONT_RIGHT;
 121       break;
 122    case BUFFER_BACK_RIGHT:
 123       statt = ST_ATTACHMENT_BACK_RIGHT;
 124       break;
 125    case BUFFER_DEPTH:
 126       statt = ST_ATTACHMENT_DEPTH_STENCIL;
 127       break;
 128    case BUFFER_ACCUM:
 129       statt = ST_ATTACHMENT_ACCUM;
 130       break;
 131    default:
 132       statt = ST_ATTACHMENT_INVALID;
 133       break;
 134    }
 135
 136    return statt;
 137 }
 138
 139 /**
 140  * Validate a framebuffer to make sure up-to-date pipe_textures are used.
 141  */
 142 static void
 143 st_framebuffer_validate(struct st_framebuffer *stfb, struct st_context *st)
 144 {
 145    struct pipe_screen *screen = st->pipe->screen;
 146    struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
 147    uint width, height;
 148    unsigned i;
 149    boolean changed = FALSE;
 150
 151    if (!p_atomic_read(&stfb->revalidate))
 152       return;
 153
 154    /* validate the fb */
 155    if (!stfb->iface->validate(stfb->iface, stfb->statts, stfb->num_statts, textures))
 156       return;
 157
 158    width = stfb->Base.Width;
 159    height = stfb->Base.Height;
 160
 161    for (i = 0; i < stfb->num_statts; i++) {
 162       struct st_renderbuffer *strb;
 163       struct pipe_surface *ps;
 164       gl_buffer_index idx;
 165
 166       if (!textures[i])
 167          continue;
 168
 169       idx = attachment_to_buffer_index(stfb->statts[i]);
 170       if (idx >= BUFFER_COUNT) {
 171          pipe_resource_reference(&textures[i], NULL);
 172          continue;
 173       }
 174
 175       strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);
 176       assert(strb);
 177       if (strb->texture == textures[i]) {
 178          pipe_resource_reference(&textures[i], NULL);
 179          continue;
 180       }
 181
 182       ps = screen->get_tex_surface(screen, textures[i], 0, 0, 0,
 183                                    PIPE_BIND_RENDER_TARGET);
 184       if (ps) {
 185          pipe_surface_reference(&strb->surface, ps);
 186          pipe_resource_reference(&strb->texture, ps->texture);
 187          /* ownership transfered */
 188          pipe_surface_reference(&ps, NULL);
 189
 190          changed = TRUE;
 191
 192          strb->Base.Width = strb->surface->width;
 193          strb->Base.Height = strb->surface->height;
 194
 195          width = strb->Base.Width;
 196          height = strb->Base.Height;
 197       }
 198
 199       pipe_resource_reference(&textures[i], NULL);
 200    }
 201
 202    if (changed) {
 203       st->dirty.st |= ST_NEW_FRAMEBUFFER;
 204       _mesa_resize_framebuffer(st->ctx, &stfb->Base, width, height);
 205
 206       assert(stfb->Base.Width == width);
 207       assert(stfb->Base.Height == height);
 208    }
 209
 210    p_atomic_set(&stfb->revalidate, FALSE);
 211 }
 212
 213 /**
 214  * Update the attachments to validate by looping the existing renderbuffers.
 215  */
 216 static void
 217 st_framebuffer_update_attachments(struct st_framebuffer *stfb)
 218 {
 219    gl_buffer_index idx;
 220
 221    stfb->num_statts = 0;
 222    for (idx = 0; idx < BUFFER_COUNT; idx++) {
 223       struct st_renderbuffer *strb;
 224       enum st_attachment_type statt;
 225
 226       strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);
 227       if (!strb || strb->software)
 228          continue;
 229
 230       statt = buffer_index_to_attachment(idx);
 231       if (statt != ST_ATTACHMENT_INVALID &&
 232           st_visual_have_buffers(stfb->iface->visual, 1 << statt))
 233          stfb->statts[stfb->num_statts++] = statt;
 234    }
 235
 236    p_atomic_set(&stfb->revalidate, TRUE);
 237 }
 238
 239 /**
 240  * Add a renderbuffer to the framebuffer.
 241  */
 242 static boolean
 243 st_framebuffer_add_renderbuffer(struct st_framebuffer *stfb,
 244                                 gl_buffer_index idx)
 245 {
 246    struct gl_renderbuffer *rb;
 247    enum pipe_format format;
 248    int samples;
 249    boolean sw;
 250
 251    if (!stfb->iface)
 252       return FALSE;
 253
 254    /* do not distinguish depth/stencil buffers */
 255    if (idx == BUFFER_STENCIL)
 256       idx = BUFFER_DEPTH;
 257
 258    switch (idx) {
 259    case BUFFER_DEPTH:
 260       format = stfb->iface->visual->depth_stencil_format;
 261       sw = FALSE;
 262       break;
 263    case BUFFER_ACCUM:
 264       format = stfb->iface->visual->accum_format;
 265       sw = TRUE;
 266       break;
 267    default:
 268       format = stfb->iface->visual->color_format;
 269       sw = FALSE;
 270       break;
 271    }
 272
 273    if (format == PIPE_FORMAT_NONE)
 274       return FALSE;
 275
 276    samples = stfb->iface->visual->samples;
 277    if (!samples)
 278       samples = st_get_msaa();
 279
 280    rb = st_new_renderbuffer_fb(format, samples, sw);
 281    if (!rb)
 282       return FALSE;
 283
 284    if (idx != BUFFER_DEPTH) {
 285       _mesa_add_renderbuffer(&stfb->Base, idx, rb);
 286    }
 287    else {
 288       if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 0))
 289          _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, rb);
 290       if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1))
 291          _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, rb);
 292    }
 293
 294    return TRUE;
 295 }
 296
 297 /**
 298  * Intialize a __GLcontextModes from a visual.
 299  */
 300 static void
 301 st_visual_to_context_mode(const struct st_visual *visual,
 302                           __GLcontextModes *mode)
 303 {
 304    memset(mode, 0, sizeof(*mode));
 305
 306    /* FBO-only context */
 307    if (!visual)
 308       return;
 309
 310    if (st_visual_have_buffers(visual, ST_ATTACHMENT_BACK_LEFT_MASK))
 311       mode->doubleBufferMode = GL_TRUE;
 312    if (st_visual_have_buffers(visual,
 313             ST_ATTACHMENT_FRONT_RIGHT_MASK | ST_ATTACHMENT_BACK_RIGHT_MASK))
 314       mode->stereoMode = GL_TRUE;
 315
 316    if (visual->color_format != PIPE_FORMAT_NONE) {
 317       mode->rgbMode = GL_TRUE;
 318
 319       mode->redBits =
 320          util_format_get_component_bits(visual->color_format,
 321                UTIL_FORMAT_COLORSPACE_RGB, 0);
 322       mode->greenBits =
 323          util_format_get_component_bits(visual->color_format,
 324                UTIL_FORMAT_COLORSPACE_RGB, 1);
 325       mode->blueBits =
 326          util_format_get_component_bits(visual->color_format,
 327                UTIL_FORMAT_COLORSPACE_RGB, 2);
 328       mode->alphaBits =
 329          util_format_get_component_bits(visual->color_format,
 330                UTIL_FORMAT_COLORSPACE_RGB, 3);
 331
 332       mode->rgbBits = mode->redBits +
 333          mode->greenBits + mode->blueBits + mode->alphaBits;
 334    }
 335
 336    if (visual->depth_stencil_format != PIPE_FORMAT_NONE) {
 337       mode->depthBits =
 338          util_format_get_component_bits(visual->depth_stencil_format,
 339                UTIL_FORMAT_COLORSPACE_ZS, 0);
 340       mode->stencilBits =
 341          util_format_get_component_bits(visual->depth_stencil_format,
 342                UTIL_FORMAT_COLORSPACE_ZS, 1);
 343
 344       mode->haveDepthBuffer = mode->depthBits > 0;
 345       mode->haveStencilBuffer = mode->stencilBits > 0;
 346    }
 347
 348    if (visual->accum_format != PIPE_FORMAT_NONE) {
 349       mode->haveAccumBuffer = GL_TRUE;
 350
 351       mode->accumRedBits =
 352          util_format_get_component_bits(visual->accum_format,
 353                UTIL_FORMAT_COLORSPACE_RGB, 0);
 354       mode->accumGreenBits =
 355          util_format_get_component_bits(visual->accum_format,
 356                UTIL_FORMAT_COLORSPACE_RGB, 1);
 357       mode->accumBlueBits =
 358          util_format_get_component_bits(visual->accum_format,
 359                UTIL_FORMAT_COLORSPACE_RGB, 2);
 360       mode->accumAlphaBits =
 361          util_format_get_component_bits(visual->accum_format,
 362                UTIL_FORMAT_COLORSPACE_RGB, 3);
 363    }
 364
 365    if (visual->samples) {
 366       mode->sampleBuffers = 1;
 367       mode->samples = visual->samples;
 368    }
 369 }
 370
 371 /**
 372  * Determine the default draw or read buffer from a visual.
 373  */
 374 static void
 375 st_visual_to_default_buffer(const struct st_visual *visual,
 376                             GLenum *buffer, GLint *index)
 377 {
 378    enum st_attachment_type statt;
 379    GLenum buf;
 380    gl_buffer_index idx;
 381
 382    statt = visual->render_buffer;
 383    /* do nothing if an invalid render buffer is specified */
 384    if (statt == ST_ATTACHMENT_INVALID ||
 385        !st_visual_have_buffers(visual, 1 << statt))
 386       return;
 387
 388    switch (statt) {
 389    case ST_ATTACHMENT_FRONT_LEFT:
 390       buf = GL_FRONT_LEFT;
 391       idx = BUFFER_FRONT_LEFT;
 392       break;
 393    case ST_ATTACHMENT_BACK_LEFT:
 394       buf = GL_BACK_LEFT;
 395       idx = BUFFER_BACK_LEFT;
 396       break;
 397    case ST_ATTACHMENT_FRONT_RIGHT:
 398       buf = GL_FRONT_RIGHT;
 399       idx = BUFFER_FRONT_RIGHT;
 400       break;
 401    case ST_ATTACHMENT_BACK_RIGHT:
 402       buf = GL_BACK_RIGHT;
 403       idx = BUFFER_BACK_RIGHT;
 404       break;
 405    default:
 406       buf = GL_NONE;
 407       idx = BUFFER_COUNT;
 408       break;
 409    }
 410
 411    if (buf != GL_NONE) {
 412       if (buffer)
 413          *buffer = buf;
 414       if (index)
 415          *index = idx;
 416    }
 417 }
 418
 419 /**
 420  * Create a framebuffer from a manager interface.
 421  */
 422 static struct st_framebuffer *
 423 st_framebuffer_create(struct st_framebuffer_iface *stfbi)
 424 {
 425    struct st_framebuffer *stfb;
 426    __GLcontextModes mode;
 427    gl_buffer_index idx;
 428
 429    stfb = CALLOC_STRUCT(st_framebuffer);
 430    if (!stfb)
 431       return NULL;
 432
 433    /* for FBO-only context */
 434    if (!stfbi) {
 435       GLframebuffer *base = _mesa_get_incomplete_framebuffer();
 436
 437       stfb->Base = *base;
 438
 439       return stfb;
 440    }
 441
 442    st_visual_to_context_mode(stfbi->visual, &mode);
 443    _mesa_initialize_window_framebuffer(&stfb->Base, &mode);
 444
 445    /* modify the draw/read buffers of the fb */
 446    st_visual_to_default_buffer(stfbi->visual, &stfb->Base.ColorDrawBuffer[0],
 447          &stfb->Base._ColorDrawBufferIndexes[0]);
 448    st_visual_to_default_buffer(stfbi->visual, &stfb->Base.ColorReadBuffer,
 449          &stfb->Base._ColorReadBufferIndex);
 450
 451    stfb->iface = stfbi;
 452
 453    /* add the color buffer */
 454    idx = stfb->Base._ColorDrawBufferIndexes[0];
 455    if (!st_framebuffer_add_renderbuffer(stfb, idx)) {
 456       FREE(stfb);
 457       return NULL;
 458    }
 459
 460    st_framebuffer_add_renderbuffer(stfb, BUFFER_DEPTH);
 461    st_framebuffer_add_renderbuffer(stfb, BUFFER_ACCUM);
 462
 463    st_framebuffer_update_attachments(stfb);
 464
 465    stfb->Base.Initialized = GL_TRUE;
 466
 467    return stfb;
 468 }
 469
 470 /**
 471  * Reference a framebuffer.
 472  */
 473 static void
 474 st_framebuffer_reference(struct st_framebuffer **ptr,
 475                          struct st_framebuffer *stfb)
 476 {
 477    GLframebuffer *fb = &stfb->Base;
 478    _mesa_reference_framebuffer((GLframebuffer **) ptr, fb);
 479 }
 480
 481 static void
 482 st_context_notify_invalid_framebuffer(struct st_context_iface *stctxi,
 483                                       struct st_framebuffer_iface *stfbi)
 484 {
 485    struct st_context *st = (struct st_context *) stctxi;
 486    struct st_framebuffer *stfb;
 487
 488    /* either draw or read winsys fb */
 489    stfb = st_ws_framebuffer(st->ctx->WinSysDrawBuffer);
 490    if (!stfb || stfb->iface != stfbi)
 491       stfb = st_ws_framebuffer(st->ctx->WinSysReadBuffer);
 492    assert(stfb && stfb->iface == stfbi);
 493
 494    p_atomic_set(&stfb->revalidate, TRUE);
 495 }
 496
 497 static void
 498 st_context_flush(struct st_context_iface *stctxi, unsigned flags,
 499                  struct pipe_fence_handle **fence)
 500 {
 501    struct st_context *st = (struct st_context *) stctxi;
 502    st_flush(st, flags, fence);
 503    if (flags & PIPE_FLUSH_RENDER_CACHE)
 504       st_manager_flush_frontbuffer(st);
 505 }
 506
 507 static boolean
 508 st_context_teximage(struct st_context_iface *stctxi, enum st_texture_type target,
 509                     int level, enum pipe_format internal_format,
 510                     struct pipe_resource *tex, boolean mipmap)
 511 {
 512    struct st_context *st = (struct st_context *) stctxi;
 513    GLcontext *ctx = st->ctx;
 514    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
 515    struct gl_texture_object *texObj;
 516    struct gl_texture_image *texImage;
 517    struct st_texture_object *stObj;
 518    struct st_texture_image *stImage;
 519    GLenum internalFormat;
 520    GLuint width, height, depth;
 521
 522    switch (target) {
 523    case ST_TEXTURE_1D:
 524       target = GL_TEXTURE_1D;
 525       break;
 526    case ST_TEXTURE_2D:
 527       target = GL_TEXTURE_2D;
 528       break;
 529    case ST_TEXTURE_3D:
 530       target = GL_TEXTURE_3D;
 531       break;
 532    case ST_TEXTURE_RECT:
 533       target = GL_TEXTURE_RECTANGLE_ARB;
 534       break;
 535    default:
 536       return FALSE;
 537       break;
 538    }
 539
 540    texObj = _mesa_select_tex_object(ctx, texUnit, target);
 541    _mesa_lock_texture(ctx, texObj);
 542
 543    stObj = st_texture_object(texObj);
 544    /* switch to surface based */
 545    if (!stObj->surface_based) {
 546       _mesa_clear_texture_object(ctx, texObj);
 547       stObj->surface_based = GL_TRUE;
 548    }
 549
 550    texImage = _mesa_get_tex_image(ctx, texObj, target, level);
 551    stImage = st_texture_image(texImage);
 552    if (tex) {
 553       /*
 554        * XXX When internal_format and tex->format differ, st_finalize_texture
 555        * needs to allocate a new texture with internal_format and copy the
 556        * texture here into the new one.  It will result in surface_copy being
 557        * called on surfaces whose formats differ.
 558        *
 559        * To avoid that, internal_format is (wrongly) ignored here.  A sane fix
 560        * is to use a sampler view.
 561        */
 562       if (!st_sampler_compat_formats(tex->format, internal_format))
 563          internal_format = tex->format;
 564
 565       if (util_format_get_component_bits(internal_format,
 566                UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
 567          internalFormat = GL_RGBA;
 568       else
 569          internalFormat = GL_RGB;
 570       _mesa_init_teximage_fields(ctx, target, texImage,
 571             tex->width0, tex->height0, 1, 0, internalFormat);
 572       texImage->TexFormat = st_ChooseTextureFormat(ctx, internalFormat,
 573             GL_RGBA, GL_UNSIGNED_BYTE);
 574       _mesa_set_fetch_functions(texImage, 2);
 575
 576       width = tex->width0;
 577       height = tex->height0;
 578       depth = tex->depth0;
 579
 580       /* grow the image size until we hit level = 0 */
 581       while (level > 0) {
 582          if (width != 1)
 583             width <<= 1;
 584          if (height != 1)
 585             height <<= 1;
 586          if (depth != 1)
 587             depth <<= 1;
 588          level--;
 589       }
 590    }
 591    else {
 592       _mesa_clear_texture_image(ctx, texImage);
 593       width = height = depth = 0;
 594    }
 595
 596    pipe_resource_reference(&stImage->pt, tex);
 597    stObj->width0 = width;
 598    stObj->height0 = height;
 599    stObj->depth0 = depth;
 600
 601    _mesa_dirty_texobj(ctx, texObj, GL_TRUE);
 602    _mesa_unlock_texture(ctx, texObj);
 603
 604    return TRUE;
 605 }
 606
 607 static void
 608 st_context_destroy(struct st_context_iface *stctxi)
 609 {
 610    struct st_context *st = (struct st_context *) stctxi;
 611    st_destroy_context(st);
 612 }
 613
 614 static struct st_context_iface *
 615 create_context(gl_api api, struct st_manager *smapi,
 616                const struct st_visual *visual,
 617                struct st_context_iface *shared_stctxi)
 618 {
 619    struct st_context *shared_ctx = (struct st_context *) shared_stctxi;
 620    struct st_context *st;
 621    struct pipe_context *pipe;
 622    __GLcontextModes mode;
 623
 624    pipe = smapi->screen->context_create(smapi->screen, NULL);
 625    if (!pipe)
 626       return NULL;
 627
 628    st_visual_to_context_mode(visual, &mode);
 629    st = st_create_context(api, pipe, &mode, shared_ctx);
 630    if (!st) {
 631       pipe->destroy(pipe);
 632       return NULL;
 633    }
 634
 635    st->invalidate_on_gl_viewport =
 636       smapi->get_param(smapi, ST_MANAGER_BROKEN_INVALIDATE);
 637
 638    st->iface.destroy = st_context_destroy;
 639    st->iface.notify_invalid_framebuffer =
 640       st_context_notify_invalid_framebuffer;
 641    st->iface.flush = st_context_flush;
 642    st->iface.teximage = st_context_teximage;
 643    st->iface.copy = NULL;
 644    st->iface.st_context_private = (void *) smapi;
 645
 646    return &st->iface;
 647 }
 648
 649 static struct st_context_iface *
 650 st_api_create_context(struct st_api *stapi, struct st_manager *smapi,
 651                       const struct st_visual *visual,
 652                       struct st_context_iface *shared_stctxi)
 653 {
 654    return create_context(API_OPENGL, smapi, visual, shared_stctxi);
 655 }
 656
 657 static struct st_context_iface *
 658 st_api_create_context_es1(struct st_api *stapi, struct st_manager *smapi,
 659                           const struct st_visual *visual,
 660                           struct st_context_iface *shared_stctxi)
 661 {
 662    return create_context(API_OPENGLES, smapi, visual, shared_stctxi);
 663 }
 664
 665 static struct st_context_iface *
 666 st_api_create_context_es2(struct st_api *stapi, struct st_manager *smapi,
 667                           const struct st_visual *visual,
 668                           struct st_context_iface *shared_stctxi)
 669 {
 670    return create_context(API_OPENGLES2, smapi, visual, shared_stctxi);
 671 }
 672
 673 static boolean
 674 st_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
 675                     struct st_framebuffer_iface *stdrawi,
 676                     struct st_framebuffer_iface *streadi)
 677 {
 678    struct st_context *st = (struct st_context *) stctxi;
 679    struct st_framebuffer *stdraw, *stread, *stfb;
 680    boolean ret;
 681
 682    _glapi_check_multithread();
 683
 684    if (st) {
 685       /* reuse/create the draw fb */
 686       stfb = st_ws_framebuffer(st->ctx->WinSysDrawBuffer);
 687       if (stfb && stfb->iface == stdrawi) {
 688          stdraw = NULL;
 689          st_framebuffer_reference(&stdraw, stfb);
 690       }
 691       else {
 692          stdraw = st_framebuffer_create(stdrawi);
 693       }
 694
 695       /* reuse/create the read fb */
 696       stfb = st_ws_framebuffer(st->ctx->WinSysReadBuffer);
 697       if (!stfb || stfb->iface != streadi)
 698          stfb = stdraw;
 699       if (stfb && stfb->iface == streadi) {
 700          stread = NULL;
 701          st_framebuffer_reference(&stread, stfb);
 702       }
 703       else {
 704          stread = st_framebuffer_create(streadi);
 705       }
 706
 707       if (stdraw && stread) {
 708          st_framebuffer_validate(stdraw, st);
 709          if (stread != stdraw)
 710             st_framebuffer_validate(stread, st);
 711
 712          /* modify the draw/read buffers of the context */
 713          if (stdraw->iface) {
 714             st_visual_to_default_buffer(stdraw->iface->visual,
 715                   &st->ctx->Color.DrawBuffer[0], NULL);
 716          }
 717          if (stread->iface) {
 718             st_visual_to_default_buffer(stread->iface->visual,
 719                   &st->ctx->Pixel.ReadBuffer, NULL);
 720          }
 721
 722          ret = _mesa_make_current(st->ctx, &stdraw->Base, &stread->Base);
 723       }
 724       else {
 725          ret = FALSE;
 726       }
 727
 728       st_framebuffer_reference(&stdraw, NULL);
 729       st_framebuffer_reference(&stread, NULL);
 730    }
 731    else {
 732       ret = _mesa_make_current(NULL, NULL, NULL);
 733    }
 734
 735    return ret;
 736 }
 737
 738 static struct st_context_iface *
 739 st_api_get_current(struct st_api *stapi)
 740 {
 741    GET_CURRENT_CONTEXT(ctx);
 742    struct st_context *st = (ctx) ? ctx->st : NULL;
 743
 744    return (st) ? &st->iface : NULL;
 745 }
 746
 747 static st_proc_t
 748 st_api_get_proc_address(struct st_api *stapi, const char *procname)
 749 {
 750    return (st_proc_t) _glapi_get_proc_address(procname);
 751 }
 752
 753 static void
 754 st_api_destroy(struct st_api *stapi)
 755 {
 756 }
 757
 758 /**
 759  * Flush the front buffer if the current context renders to the front buffer.
 760  */
 761 void
 762 st_manager_flush_frontbuffer(struct st_context *st)
 763 {
 764    struct st_framebuffer *stfb = st_ws_framebuffer(st->ctx->DrawBuffer);
 765    struct st_renderbuffer *strb = NULL;
 766
 767    if (stfb)
 768       strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
 769    if (!strb)
 770       return;
 771
 772    /* never a dummy fb */
 773    assert(stfb->iface);
 774    stfb->iface->flush_front(stfb->iface, ST_ATTACHMENT_FRONT_LEFT);
 775 }
 776
 777 /**
 778  * Return the surface of an EGLImage.
 779  */
 780 struct pipe_surface *
 781 st_manager_get_egl_image_surface(struct st_context *st,
 782                                  void *eglimg, unsigned usage)
 783 {
 784    struct st_manager *smapi =
 785       (struct st_manager *) st->iface.st_context_private;
 786    struct st_egl_image stimg;
 787    struct pipe_surface *ps;
 788
 789    if (!smapi || !smapi->get_egl_image)
 790       return NULL;
 791
 792    memset(&stimg, 0, sizeof(stimg));
 793    if (!smapi->get_egl_image(smapi, &st->iface, eglimg, &stimg))
 794       return NULL;
 795
 796    ps = smapi->screen->get_tex_surface(smapi->screen,
 797          stimg.texture, stimg.face, stimg.level, stimg.zslice, usage);
 798    pipe_resource_reference(&stimg.texture, NULL);
 799
 800    return ps;
 801 }
 802
 803 /**
 804  * Re-validate the framebuffers.
 805  */
 806 void
 807 st_manager_validate_framebuffers(struct st_context *st)
 808 {
 809    struct st_framebuffer *stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);
 810    struct st_framebuffer *stread = st_ws_framebuffer(st->ctx->ReadBuffer);
 811
 812    if (stdraw)
 813       st_framebuffer_validate(stdraw, st);
 814    if (stread && stread != stdraw)
 815       st_framebuffer_validate(stread, st);
 816 }
 817
 818 /**
 819  * Add a color renderbuffer on demand.
 820  */
 821 boolean
 822 st_manager_add_color_renderbuffer(struct st_context *st, GLframebuffer *fb,
 823                                   gl_buffer_index idx)
 824 {
 825    struct st_framebuffer *stfb = st_ws_framebuffer(fb);
 826
 827    /* FBO */
 828    if (!stfb)
 829       return FALSE;
 830
 831    if (stfb->Base.Attachment[idx].Renderbuffer)
 832       return TRUE;
 833
 834    switch (idx) {
 835    case BUFFER_FRONT_LEFT:
 836    case BUFFER_BACK_LEFT:
 837    case BUFFER_FRONT_RIGHT:
 838    case BUFFER_BACK_RIGHT:
 839       break;
 840    default:
 841       return FALSE;
 842       break;
 843    }
 844
 845    if (!st_framebuffer_add_renderbuffer(stfb, idx))
 846       return FALSE;
 847
 848    st_framebuffer_update_attachments(stfb);
 849    st_invalidate_state(st->ctx, _NEW_BUFFERS);
 850
 851    return TRUE;
 852 }
 853
 854 static const struct st_api st_gl_api = {
 855    st_api_destroy,
 856    st_api_get_proc_address,
 857    st_api_create_context,
 858    st_api_make_current,
 859    st_api_get_current,
 860 };
 861
 862 static const struct st_api st_gl_api_es1 = {
 863    st_api_destroy,
 864    st_api_get_proc_address,
 865    st_api_create_context_es1,
 866    st_api_make_current,
 867    st_api_get_current,
 868 };
 869
 870 static const struct st_api st_gl_api_es2 = {
 871    st_api_destroy,
 872    st_api_get_proc_address,
 873    st_api_create_context_es2,
 874    st_api_make_current,
 875    st_api_get_current,
 876 };
 877
 878 struct st_api *
 879 st_gl_api_create(void)
 880 {
 881    (void) st_gl_api;
 882    (void) st_gl_api_es1;
 883    (void) st_gl_api_es2;
 884
 885 #if FEATURE_GL
 886    return (struct st_api *) &st_gl_api;
 887 #else
 888    return NULL;
 889 #endif
 890 }
 891
 892 struct st_api *
 893 st_gl_api_create_es1(void)
 894 {
 895 #if FEATURE_ES1
 896    return (struct st_api *) &st_gl_api_es1;
 897 #else
 898    return NULL;
 899 #endif
 900 }
 901
 902 struct st_api *
 903 st_gl_api_create_es2(void)
 904 {
 905 #if FEATURE_ES2
 906    return (struct st_api *) &st_gl_api_es2;
 907 #else
 908    return NULL;
 909 #endif
 910 }