exo: Implement Surface::SetSurfaceLayerContents

components/exo/surface_unittest.cc

 // Copyright 2015 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 "base/bind.h"
 #include "components/exo/buffer.h"
 #include "components/exo/surface.h"
 #include "components/exo/test/exo_test_base.h"
 #include "components/exo/test/exo_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "ui/compositor/layer_tree_owner.h"
 #include "ui/gfx/gpu_memory_buffer.h"
+#include "ui/wm/core/window_util.h"
 
 namespace exo {
 namespace {
 
 class SurfaceTest : public test::ExoTestBase,
                     public ::testing::WithParamInterface<bool> {
   void SetUp() override {
     Surface::SetUseSurfaceLayer(GetParam());
     test::ExoTestBase::SetUp();
   }
@@ skipping 95 matching lines @@
   // account.
   const float kBufferScale = 2.0f;
   surface->Attach(buffer.get());
   surface->SetBufferScale(kBufferScale);
   surface->Commit();
   EXPECT_EQ(
       gfx::ScaleToFlooredSize(buffer_size, 1.0f / kBufferScale).ToString(),
       surface->bounds().size().ToString());
 }
 
+TEST_P(SurfaceTest, RecreateLayer) {
+  gfx::Size buffer_size(512, 512);
+  std::unique_ptr<Buffer> buffer(
+      new Buffer(exo_test_helper()->CreateGpuMemoryBuffer(buffer_size)));
+  std::unique_ptr<Surface> surface(new Surface);
+
+  surface->Attach(buffer.get());
+  surface->Commit();
+
+  EXPECT_EQ(buffer_size, surface->bounds().size());
+  EXPECT_EQ(buffer_size, surface->layer()->bounds().size());
+  std::unique_ptr<ui::LayerTreeOwner> old_layer_owner =
+      ::wm::RecreateLayers(surface.get(), nullptr);
+  EXPECT_EQ(buffer_size, surface->bounds().size());
+  EXPECT_EQ(buffer_size, surface->layer()->bounds().size());
+  EXPECT_EQ(buffer_size, old_layer_owner->root()->bounds().size());
+  EXPECT_TRUE(surface->layer()->has_external_content());
+  EXPECT_TRUE(old_layer_owner->root()->has_external_content());
+}
+
 TEST_P(SurfaceTest, SetViewport) {
   gfx::Size buffer_size(1, 1);
   std::unique_ptr<Buffer> buffer(
       new Buffer(exo_test_helper()->CreateGpuMemoryBuffer(buffer_size)));
   std::unique_ptr<Surface> surface(new Surface);
 
   // This will update the bounds of the surface and take the viewport into
   // account.
   surface->Attach(buffer.get());
   gfx::Size viewport(256, 256);
@@ skipping 74 matching lines @@
   std::unique_ptr<Surface> surface(new Surface);
 
   // Calling commit without a buffer should succeed.
   surface->Commit();
 }
 
 INSTANTIATE_TEST_CASE_P(, SurfaceTest, ::testing::Bool());
 
 }  // namespace
 }  // namespace exo