third_party/WebKit/Source/platform/transforms/IdentityTransformOperation.h

   1 /*
   2  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
   3  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
   4  *           (C) 2000 Dirk Mueller (mueller@kde.org)
   5  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
   6  * Copyright (C) 2006 Graham Dennis (graham.dennis@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 "platform/transforms/TransformOperation.h"
  29
  30 namespace blink {
  31
  32 class PLATFORM_EXPORT IdentityTransformOperation : public TransformOperation {
  33 public:
  34     static PassRefPtr<IdentityTransformOperation> create()
  35     {
  36         return adoptRef(new IdentityTransformOperation());
  37     }
  38
  39     virtual bool canBlendWith(const TransformOperation& other) const
  40     {
  41         return isSameType(other);
  42     }
  43
  44 private:
  45     OperationType type() const override { return Identity; }
  46
  47     bool operator==(const TransformOperation& o) const override
  48     {
  49         return isSameType(o);
  50     }
  51
  52     void apply(TransformationMatrix&, const FloatSize&) const override { }
  53
  54     PassRefPtr<TransformOperation> blend(const TransformOperation*, double, bool = false) override
  55     {
  56         return this;
  57     }
  58
  59     PassRefPtr<TransformOperation> zoom(double factor) final
  60     {
  61         return this;
  62     }
  63
  64     IdentityTransformOperation()
  65     {
  66     }
  67
  68 };
  69
  70 } // namespace blink
  71
  72 #endif // IdentityTransformOperation_h