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Unified Diff: third_party/WebKit/Source/platform/graphics/CompositorMutableStateProvider.cpp

Issue 1547893003: WIP - compositor worker mega patch. Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: . Created 4 years, 11 months ago
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Index: third_party/WebKit/Source/platform/graphics/CompositorMutableStateProvider.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/CompositorMutableStateProvider.cpp b/third_party/WebKit/Source/platform/graphics/CompositorMutableStateProvider.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..dd3322719a5bab02e2989eb521cde091e6841031
--- /dev/null
+++ b/third_party/WebKit/Source/platform/graphics/CompositorMutableStateProvider.cpp
@@ -0,0 +1,35 @@
+// Copyright 2016 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 "platform/graphics/CompositorMutableStateProvider.h"
+
+#include "cc/layers/layer_impl.h"
+#include "cc/trees/layer_tree_impl.h"
+#include "platform/graphics/CompositorMutation.h"
+#include "platform/graphics/CompositorMutableState.h"
+#include "wtf/PassOwnPtr.h"
+
+namespace blink {
+
+CompositorMutableStateProvider::CompositorMutableStateProvider(cc::LayerTreeImpl* state, CompositorMutations* mutations)
+ : m_state(state)
+ , m_mutations(mutations)
+{
+}
+
+CompositorMutableStateProvider::~CompositorMutableStateProvider() {}
+
+PassOwnPtr<CompositorMutableState>
+CompositorMutableStateProvider::getMutableStateFor(uint64_t element_id)
+{
+ cc::LayerTreeImpl::ElementLayers layers = m_state->GetMutableLayers(element_id);
+
+ if (!layers.main && !layers.scroll)
+ return nullptr;
+
+ return adoptPtr<blink::CompositorMutableState>(
+ new CompositorMutableState(&m_mutations->map[element_id], layers.main, layers.scroll));
+}
+
+} // namespace blink

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