Add optimization to TextureLayer

cc/layers/texture_layer_unittest.cc

 // Copyright 2012 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 "cc/layers/texture_layer.h"
 
 #include <string>
 
 #include "base/callback.h"
 #include "cc/base/thread.h"
 #include "cc/layers/texture_layer_client.h"
 #include "cc/layers/texture_layer_impl.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_client.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
+#include "cc/test/layer_test_common.h"
 #include "cc/test/layer_tree_test.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "cc/trees/single_thread_proxy.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::Mock;
 using ::testing::_;
 using ::testing::AtLeast;
@@ skipping 148 matching lines @@
   EXPECT_CALL(*layer_tree_host_, SetNeedsCommit()).Times(AtLeast(1));
   test_layer->SetTextureId(1);
   Mock::VerifyAndClearExpectations(layer_tree_host_.get());
 
   EXPECT_CALL(*layer_tree_host_, AcquireLayerTextures()).Times(AtLeast(1));
   EXPECT_CALL(*layer_tree_host_, SetNeedsCommit()).Times(AtLeast(1));
   test_layer->RemoveFromParent();
   Mock::VerifyAndClearExpectations(layer_tree_host_.get());
 }
 
+TEST_F(TextureLayerTest, CheckPropertyChangeCausesCorrectBehavior) {
+  scoped_refptr<TextureLayer> test_layer = TextureLayer::Create(NULL);
+  test_layer->SetLayerTreeHost(layer_tree_host_.get());
+
+  // Test properties that should call SetNeedsCommit.  All properties need to
+  // be set to new values in order for SetNeedsCommit to be called.
+  EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetFlipped(false));
+  EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetUV(
+      gfx::PointF(0.25f, 0.25f), gfx::PointF(0.75f, 0.75f)));
+  EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetVertexOpacity(
+      0.5f, 0.5f, 0.5f, 0.5f));
+  EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetPremultipliedAlpha(false));
+  EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetTextureId(1));
+
+  // Calling SetTextureId can call AcquireLayerTextures.
+  EXPECT_CALL(*layer_tree_host_, AcquireLayerTextures()).Times(AnyNumber());
+}
+
 class MockMailboxCallback {
  public:
   MOCK_METHOD3(Release, void(const std::string& mailbox,
                              unsigned sync_point,
                              bool lost_resource));
 };
 
 struct CommonMailboxObjects {
   CommonMailboxObjects()
       : mailbox_name1_(64, '1'),
@@ skipping 407 matching lines @@
 
   // Used on either thread, protected by lock_.
   base::Lock lock_;
   unsigned expected_used_textures_on_commit_;
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(TextureLayerClientTest);
 
 }  // namespace
 }  // namespace cc