Revert "Delete CC."

cc/output/filter_operations.h

+// Copyright 2013 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.
+
+#ifndef CC_OUTPUT_FILTER_OPERATIONS_H_
+#define CC_OUTPUT_FILTER_OPERATIONS_H_
+
+#include <vector>
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "cc/output/filter_operation.h"
+
+namespace base {
+namespace trace_event {
+class TracedValue;
+}
+class Value;
+}
+
+namespace cc {
+
+// An ordered list of filter operations.
+class FilterOperations {
+ public:
+  FilterOperations();
+
+  FilterOperations(const FilterOperations& other);
+
+  ~FilterOperations();
+
+  FilterOperations& operator=(const FilterOperations& other);
+
+  bool operator==(const FilterOperations& other) const;
+
+  bool operator!=(const FilterOperations& other) const {
+    return !(*this == other);
+  }
+
+  void Append(const FilterOperation& filter);
+
+  // Removes all filter operations.
+  void Clear();
+
+  bool IsEmpty() const;
+
+  void GetOutsets(int* top, int* right, int* bottom, int* left) const;
+  bool HasFilterThatMovesPixels() const;
+  bool HasFilterThatAffectsOpacity() const;
+  bool HasReferenceFilter() const;
+
+  size_t size() const {
+    return operations_.size();
+  }
+
+  const FilterOperation& at(size_t index) const {
+    DCHECK_LT(index, size());
+    return operations_[index];
+  }
+
+  // If |from| is of the same size as this, where in each position, the filter
+  // in |from| is of the same type as the filter in this, and if this doesn't
+  // contain any reference filters, returns a FilterOperations formed by
+  // linearly interpolating at each position a |progress| fraction of the way
+  // from the filter in |from| to the filter in this. If |from| and this are of
+  // different lengths, they are treated as having the same length by padding
+  // the shorter sequence with no-op filters of the same type as the filters in
+  // the corresponding positions in the longer sequence. If either sequence has
+  // a reference filter or if there is a type mismatch at some position, returns
+  // a copy of this.
+  FilterOperations Blend(const FilterOperations& from, double progress) const;
+
+  void AsValueInto(base::trace_event::TracedValue* value) const;
+
+ private:
+  std::vector<FilterOperation> operations_;
+};
+
+}  // namespace cc
+
+#endif  // CC_OUTPUT_FILTER_OPERATIONS_H_