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      1 /*
      2  * Copyright (C) 2000 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 2000 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2000 Dirk Mueller (mueller (at) kde.org)
      5  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
      6  * Copyright (C) 2006 Graham Dennis (graham.dennis (at) gmail.com)
      7  *
      8  * This library is free software; you can redistribute it and/or
      9  * modify it under the terms of the GNU Library General Public
     10  * License as published by the Free Software Foundation; either
     11  * version 2 of the License, or (at your option) any later version.
     12  *
     13  * This library is distributed in the hope that it will be useful,
     14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     16  * Library General Public License for more details.
     17  *
     18  * You should have received a copy of the GNU Library General Public License
     19  * along with this library; see the file COPYING.LIB.  If not, write to
     20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     21  * Boston, MA 02110-1301, USA.
     22  *
     23  */
     24 
     25 #ifndef IdentityTransformOperation_h
     26 #define IdentityTransformOperation_h
     27 
     28 #include "core/platform/graphics/transforms/TransformOperation.h"
     29 
     30 namespace WebCore {
     31 
     32 class IdentityTransformOperation : public TransformOperation {
     33 public:
     34     static PassRefPtr<IdentityTransformOperation> create()
     35     {
     36         return adoptRef(new IdentityTransformOperation());
     37     }
     38 
     39 private:
     40     virtual bool isIdentity() const { return true; }
     41     virtual OperationType getOperationType() const { return Identity; }
     42     virtual bool isSameType(const TransformOperation& o) const { return o.getOperationType() == Identity; }
     43 
     44     virtual bool operator==(const TransformOperation& o) const
     45     {
     46         return isSameType(o);
     47     }
     48 
     49     virtual bool apply(TransformationMatrix&, const FloatSize&) const
     50     {
     51         return false;
     52     }
     53 
     54     virtual PassRefPtr<TransformOperation> blend(const TransformOperation*, double, bool = false)
     55     {
     56         return this;
     57     }
     58 
     59     IdentityTransformOperation()
     60     {
     61     }
     62 
     63 };
     64 
     65 } // namespace WebCore
     66 
     67 #endif // IdentityTransformOperation_h
     68