ui/gl/gl_context.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 #include <string>
   6
   7 #include "base/bind.h"
   8 #include "base/cancelable_callback.h"
   9 #include "base/command_line.h"
  10 #include "base/lazy_instance.h"
  11 #include "base/logging.h"
  12 #include "base/strings/string_util.h"
  13 #include "base/threading/thread_local.h"
  14 #include "ui/gl/gl_bindings.h"
  15 #include "ui/gl/gl_context.h"
  16 #include "ui/gl/gl_gl_api_implementation.h"
  17 #include "ui/gl/gl_implementation.h"
  18 #include "ui/gl/gl_surface.h"
  19 #include "ui/gl/gl_switches.h"
  20 #include "ui/gl/gl_version_info.h"
  21 #include "ui/gl/gpu_timing.h"
  22
  23 namespace gfx {
  24
  25 namespace {
  26 base::LazyInstance<base::ThreadLocalPointer<GLContext> >::Leaky
  27     current_context_ = LAZY_INSTANCE_INITIALIZER;
  28
  29 base::LazyInstance<base::ThreadLocalPointer<GLContext> >::Leaky
  30     current_real_context_ = LAZY_INSTANCE_INITIALIZER;
  31 }  // namespace
  32
  33 GLContext::ScopedReleaseCurrent::ScopedReleaseCurrent() : canceled_(false) {}
  34
  35 GLContext::ScopedReleaseCurrent::~ScopedReleaseCurrent() {
  36   if (!canceled_ && GetCurrent()) {
  37     GetCurrent()->ReleaseCurrent(NULL);
  38   }
  39 }
  40
  41 void GLContext::ScopedReleaseCurrent::Cancel() {
  42   canceled_ = true;
  43 }
  44
  45 GLContext::GLContext(GLShareGroup* share_group) :
  46     share_group_(share_group),
  47     state_dirtied_externally_(false),
  48     swap_interval_(1),
  49     force_swap_interval_zero_(false),
  50     state_dirtied_callback_(
  51         base::Bind(&GLContext::SetStateWasDirtiedExternally,
  52         // Note that if this is not unretained, it will create a cycle (and
  53         // will never be freed.
  54         base::Unretained(this),
  55         true)) {
  56   if (!share_group_.get())
  57     share_group_ = new GLShareGroup;
  58
  59   share_group_->AddContext(this);
  60 }
  61
  62 GLContext::~GLContext() {
  63   share_group_->RemoveContext(this);
  64   if (GetCurrent() == this) {
  65     SetCurrent(NULL);
  66   }
  67 }
  68
  69 bool GLContext::GetTotalGpuMemory(size_t* bytes) {
  70   DCHECK(bytes);
  71   *bytes = 0;
  72   return false;
  73 }
  74
  75 void GLContext::SetSafeToForceGpuSwitch() {
  76 }
  77
  78 bool GLContext::ForceGpuSwitchIfNeeded() {
  79   return true;
  80 }
  81
  82 void GLContext::SetUnbindFboOnMakeCurrent() {
  83   NOTIMPLEMENTED();
  84 }
  85
  86 std::string GLContext::GetExtensions() {
  87   DCHECK(IsCurrent(NULL));
  88   if (gfx::GetGLImplementation() !=
  89       gfx::kGLImplementationDesktopGLCoreProfile) {
  90     const char* ext = reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS));
  91     return std::string(ext ? ext : "");
  92   }
  93
  94   std::vector<std::string> exts;
  95   GLint num_extensions = 0;
  96   glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
  97   for (GLint i = 0; i < num_extensions; ++i) {
  98     const char* extension = reinterpret_cast<const char*>(
  99         glGetStringi(GL_EXTENSIONS, i));
 100     DCHECK(extension != NULL);
 101     exts.push_back(extension);
 102   }
 103   return JoinString(exts, " ");
 104 }
 105
 106 std::string GLContext::GetGLVersion() {
 107   DCHECK(IsCurrent(NULL));
 108   const char *version =
 109       reinterpret_cast<const char*>(glGetString(GL_VERSION));
 110   return std::string(version ? version : "");
 111 }
 112
 113 std::string GLContext::GetGLRenderer() {
 114   DCHECK(IsCurrent(NULL));
 115   const char *renderer =
 116       reinterpret_cast<const char*>(glGetString(GL_RENDERER));
 117   return std::string(renderer ? renderer : "");
 118 }
 119
 120 base::Closure GLContext::GetStateWasDirtiedExternallyCallback() {
 121   return state_dirtied_callback_.callback();
 122 }
 123
 124 void GLContext::RestoreStateIfDirtiedExternally() {
 125   NOTREACHED();
 126 }
 127
 128 bool GLContext::GetStateWasDirtiedExternally() const {
 129   DCHECK(virtual_gl_api_);
 130   return state_dirtied_externally_;
 131 }
 132
 133 void GLContext::SetStateWasDirtiedExternally(bool dirtied_externally) {
 134   DCHECK(virtual_gl_api_);
 135   state_dirtied_externally_ = dirtied_externally;
 136 }
 137
 138 bool GLContext::HasExtension(const char* name) {
 139   std::string extensions = GetExtensions();
 140   extensions += " ";
 141
 142   std::string delimited_name(name);
 143   delimited_name += " ";
 144
 145   return extensions.find(delimited_name) != std::string::npos;
 146 }
 147
 148 const GLVersionInfo* GLContext::GetVersionInfo() {
 149   if(!version_info_) {
 150     std::string version = GetGLVersion();
 151     std::string renderer = GetGLRenderer();
 152     version_info_ =
 153         make_scoped_ptr(new GLVersionInfo(
 154             version.c_str(), renderer.c_str(),
 155             GetExtensions().c_str()));
 156   }
 157   return version_info_.get();
 158 }
 159
 160 GLShareGroup* GLContext::share_group() {
 161   return share_group_.get();
 162 }
 163
 164 bool GLContext::LosesAllContextsOnContextLost() {
 165   switch (GetGLImplementation()) {
 166     case kGLImplementationDesktopGL:
 167       return false;
 168     case kGLImplementationEGLGLES2:
 169       return true;
 170     case kGLImplementationOSMesaGL:
 171     case kGLImplementationAppleGL:
 172       return false;
 173     case kGLImplementationMockGL:
 174       return false;
 175     default:
 176       NOTREACHED();
 177       return true;
 178   }
 179 }
 180
 181 GLContext* GLContext::GetCurrent() {
 182   return current_context_.Pointer()->Get();
 183 }
 184
 185 GLContext* GLContext::GetRealCurrent() {
 186   return current_real_context_.Pointer()->Get();
 187 }
 188
 189 void GLContext::SetCurrent(GLSurface* surface) {
 190   current_context_.Pointer()->Set(surface ? this : NULL);
 191   GLSurface::SetCurrent(surface);
 192   // Leave the real GL api current so that unit tests work correctly.
 193   // TODO(sievers): Remove this, but needs all gpu_unittest classes
 194   // to create and make current a context.
 195   if (!surface && GetGLImplementation() != kGLImplementationMockGL) {
 196     SetGLApiToNoContext();
 197   }
 198 }
 199
 200 GLStateRestorer* GLContext::GetGLStateRestorer() {
 201   return state_restorer_.get();
 202 }
 203
 204 void GLContext::SetGLStateRestorer(GLStateRestorer* state_restorer) {
 205   state_restorer_ = make_scoped_ptr(state_restorer);
 206 }
 207
 208 void GLContext::SetSwapInterval(int interval) {
 209   swap_interval_ = interval;
 210   OnSetSwapInterval(force_swap_interval_zero_ ? 0 : swap_interval_);
 211 }
 212
 213 void GLContext::ForceSwapIntervalZero(bool force) {
 214   force_swap_interval_zero_ = force;
 215   OnSetSwapInterval(force_swap_interval_zero_ ? 0 : swap_interval_);
 216 }
 217
 218 bool GLContext::WasAllocatedUsingRobustnessExtension() {
 219   return false;
 220 }
 221
 222 bool GLContext::InitializeDynamicBindings() {
 223   DCHECK(IsCurrent(NULL));
 224   static bool initialized = false;
 225   if (initialized)
 226     return initialized;
 227   initialized = InitializeDynamicGLBindings(GetGLImplementation(), this);
 228   if (!initialized)
 229     LOG(ERROR) << "Could not initialize dynamic bindings.";
 230   return initialized;
 231 }
 232
 233 void GLContext::SetupForVirtualization() {
 234   if (!virtual_gl_api_) {
 235     virtual_gl_api_.reset(new VirtualGLApi());
 236     virtual_gl_api_->Initialize(&g_driver_gl, this);
 237   }
 238 }
 239
 240 bool GLContext::MakeVirtuallyCurrent(
 241     GLContext* virtual_context, GLSurface* surface) {
 242   DCHECK(virtual_gl_api_);
 243   if (!ForceGpuSwitchIfNeeded())
 244     return false;
 245   return virtual_gl_api_->MakeCurrent(virtual_context, surface);
 246 }
 247
 248 void GLContext::OnReleaseVirtuallyCurrent(GLContext* virtual_context) {
 249   if (virtual_gl_api_)
 250     virtual_gl_api_->OnReleaseVirtuallyCurrent(virtual_context);
 251 }
 252
 253 void GLContext::SetRealGLApi() {
 254   SetGLToRealGLApi();
 255 }
 256
 257 GLContextReal::GLContextReal(GLShareGroup* share_group)
 258     : GLContext(share_group) {}
 259
 260 scoped_refptr<gfx::GPUTimingClient> GLContextReal::CreateGPUTimingClient() {
 261   if (!gpu_timing_) {
 262     gpu_timing_.reset(new gfx::GPUTiming(this));
 263   }
 264   return gpu_timing_->CreateGPUTimingClient();
 265 }
 266
 267 GLContextReal::~GLContextReal() {}
 268
 269 void GLContextReal::SetCurrent(GLSurface* surface) {
 270   GLContext::SetCurrent(surface);
 271   current_real_context_.Pointer()->Set(surface ? this : NULL);
 272 }
 273
 274 }  // namespace gfx