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      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/debug/trace_event.h"
      8 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
      9 #include "third_party/skia/include/gpu/GrContext.h"
     10 #include "third_party/skia/include/gpu/gl/GrGLInterface.h"
     11 
     12 namespace webkit {
     13 namespace gpu {
     14 
     15 static void BindWebGraphicsContext3DGLContextCallback(
     16     const GrGLInterface* interface) {
     17   reinterpret_cast<blink::WebGraphicsContext3D*>(
     18       interface->fCallbackData)->makeContextCurrent();
     19 }
     20 
     21 GrContextForWebGraphicsContext3D::GrContextForWebGraphicsContext3D(
     22     blink::WebGraphicsContext3D* context3d) {
     23   if (!context3d)
     24     return;
     25 
     26   skia::RefPtr<GrGLInterface> interface = skia::AdoptRef(
     27       context3d->createGrGLInterface());
     28   if (!interface)
     29     return;
     30 
     31   interface->fCallback = BindWebGraphicsContext3DGLContextCallback;
     32   interface->fCallbackData =
     33       reinterpret_cast<GrGLInterfaceCallbackData>(context3d);
     34 
     35   gr_context_ = skia::AdoptRef(GrContext::Create(
     36       kOpenGL_GrBackend,
     37       reinterpret_cast<GrBackendContext>(interface.get())));
     38   if (gr_context_) {
     39     // The limit of the number of textures we hold in the GrContext's
     40     // bitmap->texture cache.
     41     static const int kMaxGaneshTextureCacheCount = 2048;
     42     // The limit of the bytes allocated toward textures in the GrContext's
     43     // bitmap->texture cache.
     44     static const size_t kMaxGaneshTextureCacheBytes = 96 * 1024 * 1024;
     45 
     46     gr_context_->setTextureCacheLimits(kMaxGaneshTextureCacheCount,
     47                                        kMaxGaneshTextureCacheBytes);
     48   }
     49 }
     50 
     51 GrContextForWebGraphicsContext3D::~GrContextForWebGraphicsContext3D() {
     52 }
     53 
     54 void GrContextForWebGraphicsContext3D::OnLostContext() {
     55   if (gr_context_)
     56     gr_context_->contextDestroyed();
     57 }
     58 
     59 void GrContextForWebGraphicsContext3D::FreeGpuResources() {
     60   if (gr_context_) {
     61     TRACE_EVENT_INSTANT0("gpu", "GrContext::freeGpuResources", \
     62         TRACE_EVENT_SCOPE_THREAD);
     63     gr_context_->freeGpuResources();
     64   }
     65 }
     66 
     67 }  // namespace gpu
     68 }  // namespace webkit
     69