aw: Fix FBO restore in webview functor

android_webview/browser/parent_output_surface.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/parent_output_surface.h"
 
 #include "android_webview/browser/aw_render_thread_context_provider.h"
+#include "android_webview/browser/scoped_app_gl_state_restore.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/output_surface_client.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 
 namespace android_webview {
 
 ParentOutputSurface::ParentOutputSurface(
     scoped_refptr<AwRenderThreadContextProvider> context_provider)
     : cc::OutputSurface(std::move(context_provider)) {
-  stencil_state_.stencil_test_enabled = false;
 }
 
 ParentOutputSurface::~ParentOutputSurface() {
 }
 
 void ParentOutputSurface::DidLoseOutputSurface() {
   // Android WebView does not handle context loss.
   LOG(FATAL) << "Render thread context loss";
 }
 
 void ParentOutputSurface::Reshape(const gfx::Size& size,
                                   float scale_factor,
                                   const gfx::ColorSpace& color_space,
                                   bool has_alpha) {
   DCHECK_EQ(1.f, scale_factor);
   surface_size_ = size;
 }
 
 void ParentOutputSurface::SwapBuffers(cc::CompositorFrame frame) {
   context_provider_->ContextGL()->ShallowFlushCHROMIUM();
 }
 
 bool ParentOutputSurface::HasExternalStencilTest() const {
-  return stencil_state_.stencil_test_enabled;
+  return ScopedAppGLStateRestore::Current()
+      ->stencil_state()
+      .stencil_test_enabled;
 }
 
 void ParentOutputSurface::ApplyExternalStencil() {
-  DCHECK(stencil_state_.stencil_test_enabled);
+  StencilState stencil_state =
+      ScopedAppGLStateRestore::Current()->stencil_state();
+  DCHECK(stencil_state.stencil_test_enabled);
   gpu::gles2::GLES2Interface* gl = context_provider()->ContextGL();
-  gl->StencilFuncSeparate(GL_FRONT, stencil_state_.stencil_front_func,
-                          stencil_state_.stencil_front_mask,
-                          stencil_state_.stencil_front_ref);
-  gl->StencilFuncSeparate(GL_BACK, stencil_state_.stencil_back_func,
-                          stencil_state_.stencil_back_mask,
-                          stencil_state_.stencil_back_ref);
-  gl->StencilMaskSeparate(GL_FRONT, stencil_state_.stencil_front_writemask);
-  gl->StencilMaskSeparate(GL_BACK, stencil_state_.stencil_back_writemask);
-  gl->StencilOpSeparate(GL_FRONT, stencil_state_.stencil_front_fail_op,
-                        stencil_state_.stencil_front_z_fail_op,
-                        stencil_state_.stencil_front_z_pass_op);
-  gl->StencilOpSeparate(GL_BACK, stencil_state_.stencil_back_fail_op,
-                        stencil_state_.stencil_back_z_fail_op,
-                        stencil_state_.stencil_back_z_pass_op);
+  gl->StencilFuncSeparate(GL_FRONT, stencil_state.stencil_front_func,
+                          stencil_state.stencil_front_mask,
+                          stencil_state.stencil_front_ref);
+  gl->StencilFuncSeparate(GL_BACK, stencil_state.stencil_back_func,
+                          stencil_state.stencil_back_mask,
+                          stencil_state.stencil_back_ref);
+  gl->StencilMaskSeparate(GL_FRONT, stencil_state.stencil_front_writemask);
+  gl->StencilMaskSeparate(GL_BACK, stencil_state.stencil_back_writemask);
+  gl->StencilOpSeparate(GL_FRONT, stencil_state.stencil_front_fail_op,
+                        stencil_state.stencil_front_z_fail_op,
+                        stencil_state.stencil_front_z_pass_op);
+  gl->StencilOpSeparate(GL_BACK, stencil_state.stencil_back_fail_op,
+                        stencil_state.stencil_back_z_fail_op,
+                        stencil_state.stencil_back_z_pass_op);
 }
 
 uint32_t ParentOutputSurface::GetFramebufferCopyTextureFormat() {
   auto* gl = static_cast<AwRenderThreadContextProvider*>(context_provider());
   return gl->GetCopyTextureInternalFormat();
 }
 
-void ParentOutputSurface::SetGLState(const ScopedAppGLStateRestore& gl_state) {
-  stencil_state_ = gl_state.stencil_state();
-}
-
 }  // namespace android_webview