src/ui/gl/gl_surface_egl.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // This include must be here so that the includes provided transitively
   6 // by gl_surface_egl.h don't make it impossible to compile this code.
   7 #include "third_party/mesa/src/include/GL/osmesa.h"
   8
   9 #include "ui/gl/gl_surface_egl.h"
  10
  11 #if defined(OS_ANDROID)
  12 #include <android/native_window_jni.h>
  13 #include "base/android/sys_utils.h"
  14 #endif
  15
  16 #include "base/debug/trace_event.h"
  17 #include "base/logging.h"
  18 #include "base/memory/scoped_ptr.h"
  19 #include "base/message_loop/message_loop.h"
  20 #include "build/build_config.h"
  21 #include "ui/gfx/geometry/rect.h"
  22 #include "ui/gl/egl_util.h"
  23 #include "ui/gl/gl_context.h"
  24 #include "ui/gl/gl_implementation.h"
  25 #include "ui/gl/gl_surface_osmesa.h"
  26 #include "ui/gl/gl_surface_stub.h"
  27 #include "ui/gl/gl_switches.h"
  28 #include "ui/gl/scoped_make_current.h"
  29 #include "ui/gl/sync_control_vsync_provider.h"
  30
  31 #if defined(USE_X11)
  32 extern "C" {
  33 #include <X11/Xlib.h>
  34 }
  35 #endif
  36
  37 #if defined (USE_OZONE)
  38 #include "ui/gfx/ozone/surface_factory_ozone.h"
  39 #endif
  40
  41 #if !defined(EGL_FIXED_SIZE_ANGLE)
  42 #define EGL_FIXED_SIZE_ANGLE 0x3201
  43 #endif
  44
  45 using ui::GetLastEGLErrorString;
  46
  47 namespace gfx {
  48
  49 namespace {
  50
  51 EGLConfig g_config;
  52 EGLDisplay g_display;
  53 EGLNativeDisplayType g_native_display;
  54
  55 const char* g_egl_extensions = NULL;
  56 bool g_egl_create_context_robustness_supported = false;
  57 bool g_egl_sync_control_supported = false;
  58 bool g_egl_window_fixed_size_supported = false;
  59 bool g_egl_surfaceless_context_supported = false;
  60
  61 class EGLSyncControlVSyncProvider
  62     : public gfx::SyncControlVSyncProvider {
  63  public:
  64   explicit EGLSyncControlVSyncProvider(EGLSurface surface)
  65       : SyncControlVSyncProvider(),
  66         surface_(surface) {
  67   }
  68
  69   virtual ~EGLSyncControlVSyncProvider() { }
  70
  71  protected:
  72   virtual bool GetSyncValues(int64* system_time,
  73                              int64* media_stream_counter,
  74                              int64* swap_buffer_counter) OVERRIDE {
  75     uint64 u_system_time, u_media_stream_counter, u_swap_buffer_counter;
  76     bool result = eglGetSyncValuesCHROMIUM(
  77         g_display, surface_, &u_system_time,
  78         &u_media_stream_counter, &u_swap_buffer_counter) == EGL_TRUE;
  79     if (result) {
  80       *system_time = static_cast<int64>(u_system_time);
  81       *media_stream_counter = static_cast<int64>(u_media_stream_counter);
  82       *swap_buffer_counter = static_cast<int64>(u_swap_buffer_counter);
  83     }
  84     return result;
  85   }
  86
  87   virtual bool GetMscRate(int32* numerator, int32* denominator) OVERRIDE {
  88     return false;
  89   }
  90
  91  private:
  92   EGLSurface surface_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(EGLSyncControlVSyncProvider);
  95 };
  96
  97 bool ValidateEglConfig(EGLDisplay display,
  98                        const EGLint* config_attribs,
  99                        EGLint* num_configs) {
 100   if (!eglChooseConfig(display,
 101                        config_attribs,
 102                        NULL,
 103                        0,
 104                        num_configs)) {
 105     LOG(ERROR) << "eglChooseConfig failed with error "
 106                << GetLastEGLErrorString();
 107     return false;
 108   }
 109   if (*num_configs == 0) {
 110     LOG(ERROR) << "No suitable EGL configs found.";
 111     return false;
 112   }
 113   return true;
 114 }
 115
 116 }  // namespace
 117
 118 GLSurfaceEGL::GLSurfaceEGL() {}
 119
 120 bool GLSurfaceEGL::InitializeOneOff() {
 121   static bool initialized = false;
 122   if (initialized)
 123     return true;
 124
 125   g_native_display = GetPlatformDefaultEGLNativeDisplay();
 126   g_display = eglGetDisplay(g_native_display);
 127   if (!g_display) {
 128     LOG(ERROR) << "eglGetDisplay failed with error " << GetLastEGLErrorString();
 129     return false;
 130   }
 131
 132   if (!eglInitialize(g_display, NULL, NULL)) {
 133     LOG(ERROR) << "eglInitialize failed with error " << GetLastEGLErrorString();
 134     return false;
 135   }
 136
 137   // Choose an EGL configuration.
 138   // On X this is only used for PBuffer surfaces.
 139   static EGLint config_attribs_8888[] = {
 140     EGL_BUFFER_SIZE, 32,
 141     EGL_ALPHA_SIZE, 8,
 142     EGL_BLUE_SIZE, 8,
 143     EGL_GREEN_SIZE, 8,
 144     EGL_RED_SIZE, 8,
 145     EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 146     EGL_SURFACE_TYPE, EGL_WINDOW_BIT | EGL_PBUFFER_BIT,
 147     EGL_NONE
 148   };
 149
 150 #if defined(OS_ANDROID)
 151   static EGLint config_attribs_565[] = {
 152     EGL_BUFFER_SIZE, 16,
 153     EGL_BLUE_SIZE, 5,
 154     EGL_GREEN_SIZE, 6,
 155     EGL_RED_SIZE, 5,
 156     EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 157     EGL_SURFACE_TYPE, EGL_WINDOW_BIT | EGL_PBUFFER_BIT,
 158     EGL_NONE
 159   };
 160 #endif
 161   EGLint* choose_attributes = config_attribs_8888;
 162
 163 #if defined(OS_ANDROID)
 164   if (base::android::SysUtils::IsLowEndDevice()) {
 165     choose_attributes = config_attribs_565;
 166   }
 167 #endif
 168
 169 #if defined(USE_OZONE)
 170   const EGLint* config_attribs =
 171       SurfaceFactoryOzone::GetInstance()->GetEGLSurfaceProperties(
 172           choose_attributes);
 173 #else
 174   const EGLint* config_attribs = choose_attributes;
 175 #endif
 176
 177   EGLint num_configs;
 178   EGLint config_size = 1;
 179   EGLConfig* config_data = &g_config;
 180   // Validate if there are any configs for given atrribs.
 181   if (!ValidateEglConfig(g_display,
 182                          config_attribs,
 183                          &num_configs)) {
 184     return false;
 185   }
 186
 187 #if defined(OS_ANDROID)
 188   scoped_ptr<EGLConfig[]> matching_configs(new EGLConfig[num_configs]);
 189   if (base::android::SysUtils::IsLowEndDevice()) {
 190     config_size = num_configs;
 191     config_data = matching_configs.get();
 192   }
 193 #endif
 194
 195   if (!eglChooseConfig(g_display,
 196                        config_attribs,
 197                        config_data,
 198                        config_size,
 199                        &num_configs)) {
 200     LOG(ERROR) << "eglChooseConfig failed with error "
 201                << GetLastEGLErrorString();
 202     return false;
 203   }
 204
 205 #if defined(OS_ANDROID)
 206   if (base::android::SysUtils::IsLowEndDevice()) {
 207     // Because of the EGL config sort order, we have to iterate
 208     // through all of them (it'll put higher sum(R,G,B) bits
 209     // first with the above attribs).
 210     bool match_found = false;
 211     for (int i = 0; i < num_configs; i++) {
 212       EGLBoolean success;
 213       EGLint red, green, blue;
 214       // Read the relevent attributes of the EGLConfig.
 215       success = eglGetConfigAttrib(g_display, matching_configs[i],
 216                                    EGL_RED_SIZE, &red);
 217       success &= eglGetConfigAttrib(g_display, matching_configs[i],
 218                                     EGL_BLUE_SIZE, &blue);
 219       success &= eglGetConfigAttrib(g_display, matching_configs[i],
 220                                     EGL_GREEN_SIZE, &green);
 221       if ((success == EGL_TRUE) && (red == 5) &&
 222           (green == 6) && (blue == 5)) {
 223         g_config = matching_configs[i];
 224         match_found = true;
 225         break;
 226       }
 227     }
 228     if (!match_found) {
 229       // To fall back to default 32 bit format, choose with
 230       // the right attributes again.
 231       if (!ValidateEglConfig(g_display,
 232                              config_attribs_8888,
 233                              &num_configs)) {
 234         return false;
 235       }
 236       if (!eglChooseConfig(g_display,
 237                            config_attribs_8888,
 238                            &g_config,
 239                            1,
 240                            &num_configs)) {
 241         LOG(ERROR) << "eglChooseConfig failed with error "
 242                    << GetLastEGLErrorString();
 243         return false;
 244       }
 245     }
 246   }
 247
 248 #endif
 249
 250   g_egl_extensions = eglQueryString(g_display, EGL_EXTENSIONS);
 251   g_egl_create_context_robustness_supported =
 252       HasEGLExtension("EGL_EXT_create_context_robustness");
 253   g_egl_sync_control_supported =
 254       HasEGLExtension("EGL_CHROMIUM_sync_control");
 255   g_egl_window_fixed_size_supported =
 256       HasEGLExtension("EGL_ANGLE_window_fixed_size");
 257
 258   // Check if SurfacelessEGL is supported.
 259   g_egl_surfaceless_context_supported =
 260       HasEGLExtension("EGL_KHR_surfaceless_context");
 261   if (g_egl_surfaceless_context_supported) {
 262     // EGL_KHR_surfaceless_context is supported but ensure
 263     // GL_OES_surfaceless_context is also supported. We need a current context
 264     // to query for supported GL extensions.
 265     scoped_refptr<GLSurface> surface = new SurfacelessEGL(Size(1, 1));
 266     scoped_refptr<GLContext> context = GLContext::CreateGLContext(
 267       NULL, surface.get(), PreferIntegratedGpu);
 268     if (!context->MakeCurrent(surface.get()))
 269       g_egl_surfaceless_context_supported = false;
 270
 271     // Ensure context supports GL_OES_surfaceless_context.
 272     if (g_egl_surfaceless_context_supported) {
 273       g_egl_surfaceless_context_supported = context->HasExtension(
 274           "GL_OES_surfaceless_context");
 275       context->ReleaseCurrent(surface.get());
 276     }
 277   }
 278
 279   initialized = true;
 280
 281   return true;
 282 }
 283
 284 EGLDisplay GLSurfaceEGL::GetDisplay() {
 285   return g_display;
 286 }
 287
 288 EGLDisplay GLSurfaceEGL::GetHardwareDisplay() {
 289   return g_display;
 290 }
 291
 292 EGLNativeDisplayType GLSurfaceEGL::GetNativeDisplay() {
 293   return g_native_display;
 294 }
 295
 296 const char* GLSurfaceEGL::GetEGLExtensions() {
 297   return g_egl_extensions;
 298 }
 299
 300 bool GLSurfaceEGL::HasEGLExtension(const char* name) {
 301   return ExtensionsContain(GetEGLExtensions(), name);
 302 }
 303
 304 bool GLSurfaceEGL::IsCreateContextRobustnessSupported() {
 305   return g_egl_create_context_robustness_supported;
 306 }
 307
 308 bool GLSurfaceEGL::IsEGLSurfacelessContextSupported() {
 309   return g_egl_surfaceless_context_supported;
 310 }
 311
 312 GLSurfaceEGL::~GLSurfaceEGL() {}
 313
 314 NativeViewGLSurfaceEGL::NativeViewGLSurfaceEGL(EGLNativeWindowType window)
 315     : window_(window),
 316       surface_(NULL),
 317       supports_post_sub_buffer_(false),
 318       config_(NULL),
 319       size_(1, 1) {
 320 #if defined(OS_ANDROID)
 321   if (window)
 322     ANativeWindow_acquire(window);
 323 #endif
 324
 325 #if defined(OS_WIN)
 326   RECT windowRect;
 327   if (GetClientRect(window_, &windowRect))
 328     size_ = gfx::Rect(windowRect).size();
 329 #endif
 330 }
 331
 332 bool NativeViewGLSurfaceEGL::Initialize() {
 333   return Initialize(scoped_ptr<VSyncProvider>());
 334 }
 335
 336 bool NativeViewGLSurfaceEGL::Initialize(
 337     scoped_ptr<VSyncProvider> sync_provider) {
 338   DCHECK(!surface_);
 339
 340   if (!GetDisplay()) {
 341     LOG(ERROR) << "Trying to create surface with invalid display.";
 342     return false;
 343   }
 344
 345   std::vector<EGLint> egl_window_attributes;
 346
 347   if (g_egl_window_fixed_size_supported) {
 348     egl_window_attributes.push_back(EGL_FIXED_SIZE_ANGLE);
 349     egl_window_attributes.push_back(EGL_TRUE);
 350     egl_window_attributes.push_back(EGL_WIDTH);
 351     egl_window_attributes.push_back(size_.width());
 352     egl_window_attributes.push_back(EGL_HEIGHT);
 353     egl_window_attributes.push_back(size_.height());
 354   }
 355
 356   if (gfx::g_driver_egl.ext.b_EGL_NV_post_sub_buffer) {
 357     egl_window_attributes.push_back(EGL_POST_SUB_BUFFER_SUPPORTED_NV);
 358     egl_window_attributes.push_back(EGL_TRUE);
 359   }
 360
 361   egl_window_attributes.push_back(EGL_NONE);
 362   // Create a surface for the native window.
 363   surface_ = eglCreateWindowSurface(
 364       GetDisplay(), GetConfig(), window_, &egl_window_attributes[0]);
 365
 366   if (!surface_) {
 367     LOG(ERROR) << "eglCreateWindowSurface failed with error "
 368                << GetLastEGLErrorString();
 369     Destroy();
 370     return false;
 371   }
 372
 373   EGLint surfaceVal;
 374   EGLBoolean retVal = eglQuerySurface(GetDisplay(),
 375                                       surface_,
 376                                       EGL_POST_SUB_BUFFER_SUPPORTED_NV,
 377                                       &surfaceVal);
 378   supports_post_sub_buffer_ = (surfaceVal && retVal) == EGL_TRUE;
 379
 380   if (sync_provider)
 381     vsync_provider_.reset(sync_provider.release());
 382   else if (g_egl_sync_control_supported)
 383     vsync_provider_.reset(new EGLSyncControlVSyncProvider(surface_));
 384   return true;
 385 }
 386
 387 void NativeViewGLSurfaceEGL::Destroy() {
 388   if (surface_) {
 389     if (!eglDestroySurface(GetDisplay(), surface_)) {
 390       LOG(ERROR) << "eglDestroySurface failed with error "
 391                  << GetLastEGLErrorString();
 392     }
 393     surface_ = NULL;
 394   }
 395 }
 396
 397 EGLConfig NativeViewGLSurfaceEGL::GetConfig() {
 398 #if !defined(USE_X11)
 399   return g_config;
 400 #else
 401   if (!config_) {
 402     // Get a config compatible with the window
 403     DCHECK(window_);
 404     XWindowAttributes win_attribs;
 405     if (!XGetWindowAttributes(GetNativeDisplay(), window_, &win_attribs)) {
 406       return NULL;
 407     }
 408
 409     // Try matching the window depth with an alpha channel,
 410     // because we're worried the destination alpha width could
 411     // constrain blending precision.
 412     const int kBufferSizeOffset = 1;
 413     const int kAlphaSizeOffset = 3;
 414     EGLint config_attribs[] = {
 415       EGL_BUFFER_SIZE, ~0,
 416       EGL_ALPHA_SIZE, 8,
 417       EGL_BLUE_SIZE, 8,
 418       EGL_GREEN_SIZE, 8,
 419       EGL_RED_SIZE, 8,
 420       EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 421       EGL_SURFACE_TYPE, EGL_WINDOW_BIT | EGL_PBUFFER_BIT,
 422       EGL_NONE
 423     };
 424     config_attribs[kBufferSizeOffset] = win_attribs.depth;
 425
 426     EGLint num_configs;
 427     if (!eglChooseConfig(g_display,
 428                          config_attribs,
 429                          &config_,
 430                          1,
 431                          &num_configs)) {
 432       LOG(ERROR) << "eglChooseConfig failed with error "
 433                  << GetLastEGLErrorString();
 434       return NULL;
 435     }
 436
 437     if (num_configs) {
 438       EGLint config_depth;
 439       if (!eglGetConfigAttrib(g_display,
 440                               config_,
 441                               EGL_BUFFER_SIZE,
 442                               &config_depth)) {
 443         LOG(ERROR) << "eglGetConfigAttrib failed with error "
 444                    << GetLastEGLErrorString();
 445         return NULL;
 446       }
 447
 448       if (config_depth == win_attribs.depth) {
 449         return config_;
 450       }
 451     }
 452
 453     // Try without an alpha channel.
 454     config_attribs[kAlphaSizeOffset] = 0;
 455     if (!eglChooseConfig(g_display,
 456                          config_attribs,
 457                          &config_,
 458                          1,
 459                          &num_configs)) {
 460       LOG(ERROR) << "eglChooseConfig failed with error "
 461                  << GetLastEGLErrorString();
 462       return NULL;
 463     }
 464
 465     if (num_configs == 0) {
 466       LOG(ERROR) << "No suitable EGL configs found.";
 467       return NULL;
 468     }
 469   }
 470   return config_;
 471 #endif
 472 }
 473
 474 bool NativeViewGLSurfaceEGL::IsOffscreen() {
 475   return false;
 476 }
 477
 478 bool NativeViewGLSurfaceEGL::SwapBuffers() {
 479   TRACE_EVENT2("gpu", "NativeViewGLSurfaceEGL:RealSwapBuffers",
 480       "width", GetSize().width(),
 481       "height", GetSize().height());
 482
 483   if (!eglSwapBuffers(GetDisplay(), surface_)) {
 484     DVLOG(1) << "eglSwapBuffers failed with error "
 485              << GetLastEGLErrorString();
 486     return false;
 487   }
 488
 489   return true;
 490 }
 491
 492 gfx::Size NativeViewGLSurfaceEGL::GetSize() {
 493   EGLint width;
 494   EGLint height;
 495   if (!eglQuerySurface(GetDisplay(), surface_, EGL_WIDTH, &width) ||
 496       !eglQuerySurface(GetDisplay(), surface_, EGL_HEIGHT, &height)) {
 497     NOTREACHED() << "eglQuerySurface failed with error "
 498                  << GetLastEGLErrorString();
 499     return gfx::Size();
 500   }
 501
 502   return gfx::Size(width, height);
 503 }
 504
 505 bool NativeViewGLSurfaceEGL::Resize(const gfx::Size& size) {
 506   if (size == GetSize())
 507     return true;
 508
 509   size_ = size;
 510
 511   scoped_ptr<ui::ScopedMakeCurrent> scoped_make_current;
 512   GLContext* current_context = GLContext::GetCurrent();
 513   bool was_current =
 514       current_context && current_context->IsCurrent(this);
 515   if (was_current) {
 516     scoped_make_current.reset(
 517         new ui::ScopedMakeCurrent(current_context, this));
 518     current_context->ReleaseCurrent(this);
 519   }
 520
 521   Destroy();
 522
 523   if (!Initialize()) {
 524     LOG(ERROR) << "Failed to resize window.";
 525     return false;
 526   }
 527
 528   return true;
 529 }
 530
 531 bool NativeViewGLSurfaceEGL::Recreate() {
 532   Destroy();
 533   if (!Initialize()) {
 534     LOG(ERROR) << "Failed to create surface.";
 535     return false;
 536   }
 537   return true;
 538 }
 539
 540 EGLSurface NativeViewGLSurfaceEGL::GetHandle() {
 541   return surface_;
 542 }
 543
 544 bool NativeViewGLSurfaceEGL::SupportsPostSubBuffer() {
 545   return supports_post_sub_buffer_;
 546 }
 547
 548 bool NativeViewGLSurfaceEGL::PostSubBuffer(
 549     int x, int y, int width, int height) {
 550   DCHECK(supports_post_sub_buffer_);
 551   if (!eglPostSubBufferNV(GetDisplay(), surface_, x, y, width, height)) {
 552     DVLOG(1) << "eglPostSubBufferNV failed with error "
 553              << GetLastEGLErrorString();
 554     return false;
 555   }
 556   return true;
 557 }
 558
 559 VSyncProvider* NativeViewGLSurfaceEGL::GetVSyncProvider() {
 560   return vsync_provider_.get();
 561 }
 562
 563 NativeViewGLSurfaceEGL::~NativeViewGLSurfaceEGL() {
 564   Destroy();
 565 #if defined(OS_ANDROID)
 566   if (window_)
 567     ANativeWindow_release(window_);
 568 #endif
 569 }
 570
 571 void NativeViewGLSurfaceEGL::SetHandle(EGLSurface surface) {
 572   surface_ = surface;
 573 }
 574
 575 PbufferGLSurfaceEGL::PbufferGLSurfaceEGL(const gfx::Size& size)
 576     : size_(size),
 577       surface_(NULL) {
 578 }
 579
 580 bool PbufferGLSurfaceEGL::Initialize() {
 581   EGLSurface old_surface = surface_;
 582
 583   EGLDisplay display = GetDisplay();
 584   if (!display) {
 585     LOG(ERROR) << "Trying to create surface with invalid display.";
 586     return false;
 587   }
 588
 589   if (size_.GetArea() == 0) {
 590     LOG(ERROR) << "Error: surface has zero area "
 591                << size_.width() << " x " << size_.height();
 592     return false;
 593   }
 594
 595   // Allocate the new pbuffer surface before freeing the old one to ensure
 596   // they have different addresses. If they have the same address then a
 597   // future call to MakeCurrent might early out because it appears the current
 598   // context and surface have not changed.
 599   const EGLint pbuffer_attribs[] = {
 600     EGL_WIDTH, size_.width(),
 601     EGL_HEIGHT, size_.height(),
 602     EGL_NONE
 603   };
 604
 605   EGLSurface new_surface = eglCreatePbufferSurface(display,
 606                                                    GetConfig(),
 607                                                    pbuffer_attribs);
 608   if (!new_surface) {
 609     LOG(ERROR) << "eglCreatePbufferSurface failed with error "
 610                << GetLastEGLErrorString();
 611     return false;
 612   }
 613
 614   if (old_surface)
 615     eglDestroySurface(display, old_surface);
 616
 617   surface_ = new_surface;
 618   return true;
 619 }
 620
 621 void PbufferGLSurfaceEGL::Destroy() {
 622   if (surface_) {
 623     if (!eglDestroySurface(GetDisplay(), surface_)) {
 624       LOG(ERROR) << "eglDestroySurface failed with error "
 625                  << GetLastEGLErrorString();
 626     }
 627     surface_ = NULL;
 628   }
 629 }
 630
 631 EGLConfig PbufferGLSurfaceEGL::GetConfig() {
 632   return g_config;
 633 }
 634
 635 bool PbufferGLSurfaceEGL::IsOffscreen() {
 636   return true;
 637 }
 638
 639 bool PbufferGLSurfaceEGL::SwapBuffers() {
 640   NOTREACHED() << "Attempted to call SwapBuffers on a PbufferGLSurfaceEGL.";
 641   return false;
 642 }
 643
 644 gfx::Size PbufferGLSurfaceEGL::GetSize() {
 645   return size_;
 646 }
 647
 648 bool PbufferGLSurfaceEGL::Resize(const gfx::Size& size) {
 649   if (size == size_)
 650     return true;
 651
 652   scoped_ptr<ui::ScopedMakeCurrent> scoped_make_current;
 653   GLContext* current_context = GLContext::GetCurrent();
 654   bool was_current =
 655       current_context && current_context->IsCurrent(this);
 656   if (was_current) {
 657     scoped_make_current.reset(
 658         new ui::ScopedMakeCurrent(current_context, this));
 659   }
 660
 661   size_ = size;
 662
 663   if (!Initialize()) {
 664     LOG(ERROR) << "Failed to resize pbuffer.";
 665     return false;
 666   }
 667
 668   return true;
 669 }
 670
 671 EGLSurface PbufferGLSurfaceEGL::GetHandle() {
 672   return surface_;
 673 }
 674
 675 void* PbufferGLSurfaceEGL::GetShareHandle() {
 676 #if defined(OS_ANDROID)
 677   NOTREACHED();
 678   return NULL;
 679 #else
 680   if (!gfx::g_driver_egl.ext.b_EGL_ANGLE_query_surface_pointer)
 681     return NULL;
 682
 683   if (!gfx::g_driver_egl.ext.b_EGL_ANGLE_surface_d3d_texture_2d_share_handle)
 684     return NULL;
 685
 686   void* handle;
 687   if (!eglQuerySurfacePointerANGLE(g_display,
 688                                    GetHandle(),
 689                                    EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE,
 690                                    &handle)) {
 691     return NULL;
 692   }
 693
 694   return handle;
 695 #endif
 696 }
 697
 698 PbufferGLSurfaceEGL::~PbufferGLSurfaceEGL() {
 699   Destroy();
 700 }
 701
 702 SurfacelessEGL::SurfacelessEGL(const gfx::Size& size)
 703     : size_(size) {
 704 }
 705
 706 bool SurfacelessEGL::Initialize() {
 707   return true;
 708 }
 709
 710 void SurfacelessEGL::Destroy() {
 711 }
 712
 713 EGLConfig SurfacelessEGL::GetConfig() {
 714   return g_config;
 715 }
 716
 717 bool SurfacelessEGL::IsOffscreen() {
 718   return true;
 719 }
 720
 721 bool SurfacelessEGL::SwapBuffers() {
 722   LOG(ERROR) << "Attempted to call SwapBuffers with SurfacelessEGL.";
 723   return false;
 724 }
 725
 726 gfx::Size SurfacelessEGL::GetSize() {
 727   return size_;
 728 }
 729
 730 bool SurfacelessEGL::Resize(const gfx::Size& size) {
 731   size_ = size;
 732   return true;
 733 }
 734
 735 EGLSurface SurfacelessEGL::GetHandle() {
 736   return EGL_NO_SURFACE;
 737 }
 738
 739 void* SurfacelessEGL::GetShareHandle() {
 740   return NULL;
 741 }
 742
 743 SurfacelessEGL::~SurfacelessEGL() {
 744 }
 745
 746 }  // namespace gfx