android_webview/browser/aw_render_thread_context_provider.cc

   1 // Copyright 2015 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 "android_webview/browser/aw_render_thread_context_provider.h"
   6
   7 #include "base/bind.h"
   8 #include "base/callback_helpers.h"
   9 #include "base/lazy_instance.h"
  10 #include "base/trace_event/trace_event.h"
  11 #include "cc/output/managed_memory_policy.h"
  12 #include "gpu/blink/webgraphicscontext3d_impl.h"
  13 #include "gpu/command_buffer/client/gl_in_process_context.h"
  14 #include "gpu/command_buffer/client/gles2_implementation.h"
  15 #include "gpu/command_buffer/client/gles2_lib.h"
  16 #include "gpu/skia_bindings/gl_bindings_skia_cmd_buffer.h"
  17 #include "third_party/skia/include/gpu/GrContext.h"
  18 #include "third_party/skia/include/gpu/gl/GrGLInterface.h"
  19
  20 namespace android_webview {
  21
  22 namespace {
  23
  24 // Singleton used to initialize and terminate the gles2 library.
  25 class GLES2Initializer {
  26  public:
  27   GLES2Initializer() { gles2::Initialize(); }
  28
  29   ~GLES2Initializer() { gles2::Terminate(); }
  30
  31  private:
  32   DISALLOW_COPY_AND_ASSIGN(GLES2Initializer);
  33 };
  34
  35 base::LazyInstance<GLES2Initializer> g_gles2_initializer =
  36     LAZY_INSTANCE_INITIALIZER;
  37
  38 }  // namespace
  39
  40 // static
  41 scoped_refptr<AwRenderThreadContextProvider>
  42 AwRenderThreadContextProvider::Create(
  43     scoped_refptr<gfx::GLSurface> surface,
  44     scoped_refptr<gpu::InProcessCommandBuffer::Service> service) {
  45   return new AwRenderThreadContextProvider(surface, service);
  46 }
  47
  48 AwRenderThreadContextProvider::AwRenderThreadContextProvider(
  49     scoped_refptr<gfx::GLSurface> surface,
  50     scoped_refptr<gpu::InProcessCommandBuffer::Service> service)
  51     : destroyed_(false) {
  52   DCHECK(main_thread_checker_.CalledOnValidThread());
  53
  54   blink::WebGraphicsContext3D::Attributes attributes;
  55   attributes.antialias = false;
  56   attributes.depth = false;
  57   attributes.stencil = false;
  58   attributes.shareResources = true;
  59   attributes.noAutomaticFlushes = true;
  60   gpu::gles2::ContextCreationAttribHelper attribs_for_gles2;
  61   gpu_blink::WebGraphicsContext3DImpl::ConvertAttributes(attributes,
  62                                                          &attribs_for_gles2);
  63   attribs_for_gles2.lose_context_when_out_of_memory = true;
  64
  65   context_.reset(gpu::GLInProcessContext::Create(
  66       service,
  67       surface,
  68       surface->IsOffscreen(),
  69       gfx::kNullAcceleratedWidget,
  70       surface->GetSize(),
  71       NULL /* share_context */,
  72       false /* share_resources */,
  73       attribs_for_gles2,
  74       gfx::PreferDiscreteGpu,
  75       gpu::GLInProcessContextSharedMemoryLimits(),
  76       nullptr,
  77       nullptr));
  78
  79   context_->SetContextLostCallback(base::Bind(
  80       &AwRenderThreadContextProvider::OnLostContext, base::Unretained(this)));
  81
  82   capabilities_.gpu = context_->GetImplementation()->capabilities();
  83 }
  84
  85 AwRenderThreadContextProvider::~AwRenderThreadContextProvider() {
  86   DCHECK(main_thread_checker_.CalledOnValidThread());
  87 }
  88
  89 bool AwRenderThreadContextProvider::BindToCurrentThread() {
  90   // This is called on the thread the context will be used.
  91   DCHECK(main_thread_checker_.CalledOnValidThread());
  92
  93   return true;
  94 }
  95
  96 cc::ContextProvider::Capabilities
  97 AwRenderThreadContextProvider::ContextCapabilities() {
  98   DCHECK(main_thread_checker_.CalledOnValidThread());
  99
 100   return capabilities_;
 101 }
 102
 103 gpu::gles2::GLES2Interface* AwRenderThreadContextProvider::ContextGL() {
 104   DCHECK(main_thread_checker_.CalledOnValidThread());
 105
 106   return context_->GetImplementation();
 107 }
 108
 109 gpu::ContextSupport* AwRenderThreadContextProvider::ContextSupport() {
 110   DCHECK(main_thread_checker_.CalledOnValidThread());
 111
 112   return context_->GetImplementation();
 113 }
 114
 115 static void BindGrContextCallback(const GrGLInterface* interface) {
 116   cc::ContextProvider* context_provider =
 117       reinterpret_cast<AwRenderThreadContextProvider*>(
 118           interface->fCallbackData);
 119
 120   gles2::SetGLContext(context_provider->ContextGL());
 121 }
 122
 123 class GrContext* AwRenderThreadContextProvider::GrContext() {
 124   DCHECK(main_thread_checker_.CalledOnValidThread());
 125
 126   if (gr_context_)
 127     return gr_context_.get();
 128
 129   // The GrGLInterface factory will make GL calls using the C GLES2 interface.
 130   // Make sure the gles2 library is initialized first on exactly one thread.
 131   g_gles2_initializer.Get();
 132   gles2::SetGLContext(ContextGL());
 133
 134   skia::RefPtr<GrGLInterface> interface =
 135       skia::AdoptRef(skia_bindings::CreateCommandBufferSkiaGLBinding());
 136   interface->fCallback = BindGrContextCallback;
 137   interface->fCallbackData = reinterpret_cast<GrGLInterfaceCallbackData>(this);
 138
 139   gr_context_ = skia::AdoptRef(GrContext::Create(
 140       kOpenGL_GrBackend, reinterpret_cast<GrBackendContext>(interface.get())));
 141
 142   return gr_context_.get();
 143 }
 144
 145 void AwRenderThreadContextProvider::InvalidateGrContext(uint32_t state) {
 146   DCHECK(main_thread_checker_.CalledOnValidThread());
 147
 148   if (gr_context_)
 149     gr_context_.get()->resetContext(state);
 150 }
 151
 152 void AwRenderThreadContextProvider::SetupLock() {
 153   context_->SetLock(&context_lock_);
 154 }
 155
 156 base::Lock* AwRenderThreadContextProvider::GetLock() {
 157   return &context_lock_;
 158 }
 159
 160 void AwRenderThreadContextProvider::VerifyContexts() {
 161 }
 162
 163 void AwRenderThreadContextProvider::DeleteCachedResources() {
 164   DCHECK(main_thread_checker_.CalledOnValidThread());
 165
 166   if (gr_context_) {
 167     TRACE_EVENT_INSTANT0("gpu", "GrContext::freeGpuResources",
 168                          TRACE_EVENT_SCOPE_THREAD);
 169     gr_context_->freeGpuResources();
 170   }
 171 }
 172
 173 bool AwRenderThreadContextProvider::DestroyedOnMainThread() {
 174   DCHECK(main_thread_checker_.CalledOnValidThread());
 175
 176   return destroyed_;
 177 }
 178
 179 void AwRenderThreadContextProvider::SetLostContextCallback(
 180     const LostContextCallback& lost_context_callback) {
 181   lost_context_callback_ = lost_context_callback;
 182 }
 183
 184 void AwRenderThreadContextProvider::SetMemoryPolicyChangedCallback(
 185     const MemoryPolicyChangedCallback& memory_policy_changed_callback) {
 186   // There's no memory manager for the in-process implementation.
 187 }
 188
 189 void AwRenderThreadContextProvider::OnLostContext() {
 190   DCHECK(main_thread_checker_.CalledOnValidThread());
 191
 192   if (destroyed_)
 193     return;
 194   destroyed_ = true;
 195
 196   if (!lost_context_callback_.is_null())
 197     base::ResetAndReturn(&lost_context_callback_).Run();
 198   if (gr_context_)
 199     gr_context_->abandonContext();
 200 }
 201
 202 }  // namespace android_webview