Android: SetCreateContextCallback

android_webview/browser/deferred_gpu_command_service.cc

Index: android_webview/browser/deferred_gpu_command_service.cc
diff --git a/android_webview/browser/deferred_gpu_command_service.cc b/android_webview/browser/deferred_gpu_command_service.cc
index 0bcb3afdcc3147d7d43f263160a4c435947b854d..a0ed04ac214484db1324fc31ed7571c1375d4fa4 100644
--- a/android_webview/browser/deferred_gpu_command_service.cc
+++ b/android_webview/browser/deferred_gpu_command_service.cc
@@ -6,17 +6,60 @@
 
 #include "android_webview/browser/gl_view_renderer_manager.h"
 #include "android_webview/browser/shared_renderer_state.h"
+#include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/synchronization/lock.h"
 #include "base/trace_event/trace_event.h"
 #include "content/public/browser/android/synchronous_compositor.h"
+#include "gpu/blink/webgraphicscontext3d_impl.h"
+#include "gpu/blink/webgraphicscontext3d_in_process_command_buffer_impl.h"
+#include "gpu/command_buffer/client/gl_in_process_context.h"
+#include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/shader_translator_cache.h"
+#include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
+#include "webkit/common/gpu/context_provider_in_process.h"
 
 namespace android_webview {
 
 namespace {
+
 base::LazyInstance<scoped_refptr<DeferredGpuCommandService> >
     g_service = LAZY_INSTANCE_INITIALIZER;
+
+content::SynchronousCompositor::ContextHolder GetContextHolder(
+    bool need_share_group_with_parent,

[tfarina, 2015/02/24 17:02:34]

What I do with this?

[boliu, 2015/02/24 21:52:57]

If true, pass g_service as the first parameter to GLInProcessContext::Create.
Otherwise pass null.

[tfarina, 2015/02/24 22:10:12]

Done.

+    const blink::WebGraphicsContext3D::Attributes& attributes,
+    bool is_offscreen,
+    const gpu::GLInProcessContextSharedMemoryLimits& mem_limits) {
+  content::SynchronousCompositor::ContextHolder holder;
+
+  gpu::gles2::ContextCreationAttribHelper in_process_attribs;
+  gpu_blink::WebGraphicsContext3DImpl::ConvertAttributes(attributes,
+                                                         &in_process_attribs);
+  in_process_attribs.lose_context_when_out_of_memory = true;
+
+  scoped_ptr<gpu::GLInProcessContext> context(gpu::GLInProcessContext::Create(
+      NULL /* service */,
+      NULL /* surface */,
+      is_offscreen,
+      gfx::kNullAcceleratedWidget,
+      gfx::Size(1, 1),
+      NULL /* share_context */,
+      attributes.shareResources,
+      in_process_attribs,
+      gfx::PreferDiscreteGpu,
+      mem_limits,
+      nullptr,
+      nullptr));
+
+  holder.context_provider = webkit::gpu::ContextProviderInProcess::Create(
+      gpu_blink::WebGraphicsContext3DInProcessCommandBufferImpl::WrapContext(
+          context.Pass(), attributes), std::string());
+
+  holder.context = context.get();

[boliu, 2015/02/24 21:52:57]

You already called context.Pass() 2 lines above, so it's null here now.

[tfarina, 2015/02/24 22:10:12]

Done.

+  return holder;
+}
+
 }  // namespace
 
 base::LazyInstance<base::ThreadLocalBoolean> ScopedAllowGL::allow_gl;
@@ -50,7 +93,8 @@ ScopedAllowGL::~ScopedAllowGL() {
 void DeferredGpuCommandService::SetInstance() {
   if (!g_service.Get().get()) {
     g_service.Get() = new DeferredGpuCommandService;
-    content::SynchronousCompositor::SetGpuService(g_service.Get());
+    content::SynchronousCompositor::SetCreateContextCallback(
+        base::Bind(&GetContextHolder));
   }
 }