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Unified Diff: cc/blink/web_compositor_mutable_state_provider_impl.cc

Issue 1447893002: compositor-worker: Introduce WebCompositorMutableState (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: . Created 5 years ago
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Index: cc/blink/web_compositor_mutable_state_provider_impl.cc
diff --git a/cc/blink/web_compositor_mutable_state_provider_impl.cc b/cc/blink/web_compositor_mutable_state_provider_impl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4bfcd0db6044b0896f8fa8a41382575fe4f2abe5
--- /dev/null
+++ b/cc/blink/web_compositor_mutable_state_provider_impl.cc
@@ -0,0 +1,34 @@
+// 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 "cc/blink/web_compositor_mutable_state_provider_impl.h"
+
+#include "cc/animation/layer_tree_mutation.h"
+#include "cc/blink/web_compositor_mutable_state_impl.h"
+#include "cc/layers/layer_impl.h"
+#include "cc/trees/layer_tree_impl.h"
+
+namespace cc_blink {
+
+WebCompositorMutableStateProviderImpl::WebCompositorMutableStateProviderImpl(
+ cc::LayerTreeImpl* state,
+ cc::LayerTreeMutationMap* mutations)
+ : state_(state), mutations_(mutations) {}
+
+WebCompositorMutableStateProviderImpl::
+ ~WebCompositorMutableStateProviderImpl() {}
+
+blink::WebCompositorMutableState*
+WebCompositorMutableStateProviderImpl::getMutableStateFor(uint64_t element_id) {
+ cc::LayerTreeImpl::ElementLayers layers =
+ state_->GetMutableLayers(element_id);
+
+ if (!layers.main && !layers.scroll)
+ return nullptr;
+
+ return new WebCompositorMutableStateImpl(&(*mutations_)[element_id],
+ layers.main, layers.scroll);
+}
+
+} // namespace cc_blink

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