webkit/common/gpu/grcontext_for_webgraphicscontext3d.cc

   1 // Copyright (c) 2013 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 "webkit/common/gpu/grcontext_for_webgraphicscontext3d.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "base/trace_event/trace_event.h"
   9 #include "gpu/blink/webgraphicscontext3d_impl.h"
  10 #include "gpu/command_buffer/client/gles2_lib.h"
  11 #include "third_party/skia/include/gpu/GrContext.h"
  12 #include "third_party/skia/include/gpu/gl/GrGLInterface.h"
  13
  14 using gpu_blink::WebGraphicsContext3DImpl;
  15
  16 namespace webkit {
  17 namespace gpu {
  18
  19 namespace {
  20
  21 // Singleton used to initialize and terminate the gles2 library.
  22 class GLES2Initializer {
  23  public:
  24   GLES2Initializer() { gles2::Initialize(); }
  25
  26   ~GLES2Initializer() { gles2::Terminate(); }
  27
  28  private:
  29   DISALLOW_COPY_AND_ASSIGN(GLES2Initializer);
  30 };
  31
  32 base::LazyInstance<GLES2Initializer> g_gles2_initializer =
  33     LAZY_INSTANCE_INITIALIZER;
  34
  35 void BindWebGraphicsContext3DGLContextCallback(const GrGLInterface* interface) {
  36   gles2::SetGLContext(reinterpret_cast<WebGraphicsContext3DImpl*>(
  37                           interface->fCallbackData)->GetGLInterface());
  38 }
  39
  40 }  // namespace anonymous
  41
  42 GrContextForWebGraphicsContext3D::GrContextForWebGraphicsContext3D(
  43     WebGraphicsContext3DImpl* context3d) {
  44   if (!context3d)
  45     return;
  46
  47   // Ensure the gles2 library is initialized first in a thread safe way.
  48   g_gles2_initializer.Get();
  49   gles2::SetGLContext(context3d->GetGLInterface());
  50   skia::RefPtr<GrGLInterface> interface = skia::AdoptRef(
  51       context3d->createGrGLInterface());
  52   if (!interface)
  53     return;
  54
  55   interface->fCallback = BindWebGraphicsContext3DGLContextCallback;
  56   interface->fCallbackData =
  57       reinterpret_cast<GrGLInterfaceCallbackData>(context3d);
  58
  59   gr_context_ = skia::AdoptRef(GrContext::Create(
  60       kOpenGL_GrBackend,
  61       reinterpret_cast<GrBackendContext>(interface.get())));
  62   if (gr_context_) {
  63     // The limit of the number of GPU resources we hold in the GrContext's
  64     // GPU cache.
  65     static const int kMaxGaneshResourceCacheCount = 2048;
  66     // The limit of the bytes allocated toward GPU resources in the GrContext's
  67     // GPU cache.
  68     static const size_t kMaxGaneshResourceCacheBytes = 96 * 1024 * 1024;
  69
  70     gr_context_->setResourceCacheLimits(kMaxGaneshResourceCacheCount,
  71                                         kMaxGaneshResourceCacheBytes);
  72   }
  73 }
  74
  75 GrContextForWebGraphicsContext3D::~GrContextForWebGraphicsContext3D() {
  76 }
  77
  78 void GrContextForWebGraphicsContext3D::OnLostContext() {
  79   if (gr_context_)
  80     gr_context_->abandonContext();
  81 }
  82
  83 void GrContextForWebGraphicsContext3D::FreeGpuResources() {
  84   if (gr_context_) {
  85     TRACE_EVENT_INSTANT0("gpu", "GrContext::freeGpuResources", \
  86         TRACE_EVENT_SCOPE_THREAD);
  87     gr_context_->freeGpuResources();
  88   }
  89 }
  90
  91 }  // namespace gpu
  92 }  // namespace webkit