Implement external stencil for Android WebView

android_webview/browser/hardware_renderer.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "android_webview/browser/hardware_renderer.h"
 
 #include <utility>
 
 #include "android_webview/browser/aw_gl_surface.h"
 #include "android_webview/browser/aw_render_thread_context_provider.h"
@@ skipping 69 matching lines @@
       shared_renderer_state_->PassCompositorFrameOnRT();
   if (!child_frame.get())
     return;
 
   ReturnResourcesInChildFrame();
   child_frame_ = std::move(child_frame);
   DCHECK(child_frame_->frame.get());
   DCHECK(!child_frame_->frame->gl_frame_data);
 }
 
-void HardwareRenderer::DrawGL(bool stencil_enabled,
-                              AwDrawGLInfo* draw_info) {
+void HardwareRenderer::DrawGL(AwDrawGLInfo* draw_info,
+                              const ScopedAppGLStateRestore& gl_state) {
   TRACE_EVENT0("android_webview", "HardwareRenderer::DrawGL");
 
   // We need to watch if the current Android context has changed and enforce
   // a clean-up in the compositor.
   EGLContext current_context = eglGetCurrentContext();
   DCHECK(current_context) << "DrawGL called without EGLContext";
 
   // TODO(boliu): Handle context loss.
   if (last_egl_context_ != current_context)
     DLOG(WARNING) << "EGLContextChanged";
@@ skipping 102 matching lines @@
 
   if (!output_surface_) {
     scoped_refptr<cc::ContextProvider> context_provider =
         AwRenderThreadContextProvider::Create(
             gl_surface_, DeferredGpuCommandService::GetInstance());
     scoped_ptr<ParentOutputSurface> output_surface_holder(
         new ParentOutputSurface(context_provider));
     output_surface_ = output_surface_holder.get();
     display_->Initialize(std::move(output_surface_holder), nullptr);
   }
-  output_surface_->SetExternalStencilTest(stencil_enabled);
+  output_surface_->SetGLState(gl_state);
   display_->SetExternalClip(clip);
   display_->DrawAndSwap();
 }
 
 void HardwareRenderer::ReturnResources(
     const cc::ReturnedResourceArray& resources) {
   ReturnResourcesToCompositor(resources, compositor_id_);
 }
 
 void HardwareRenderer::SetBeginFrameSource(
@@ skipping 22 matching lines @@
   child_frame_.reset();
 }
 
 void HardwareRenderer::ReturnResourcesToCompositor(
     const cc::ReturnedResourceArray& resources,
     unsigned int compositor_id) {
   shared_renderer_state_->InsertReturnedResourcesOnRT(resources, compositor_id);
 }
 
 }  // namespace android_webview