third_party/WebKit/Source/platform/transforms/SkewTransformOperation.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 SkewTransformOperation_h
  26 #define SkewTransformOperation_h
  27
  28 #include "platform/transforms/TransformOperation.h"
  29
  30 namespace blink {
  31
  32 class PLATFORM_EXPORT SkewTransformOperation : public TransformOperation {
  33 public:
  34     static PassRefPtr<SkewTransformOperation> create(double angleX, double angleY, OperationType type)
  35     {
  36         return adoptRef(new SkewTransformOperation(angleX, angleY, type));
  37     }
  38
  39     double angleX() const { return m_angleX; }
  40     double angleY() const { return m_angleY; }
  41
  42     virtual bool canBlendWith(const TransformOperation& other) const;
  43 private:
  44     OperationType type() const override { return m_type; }
  45
  46     bool operator==(const TransformOperation& o) const override
  47     {
  48         if (!isSameType(o))
  49             return false;
  50         const SkewTransformOperation* s = static_cast<const SkewTransformOperation*>(&o);
  51         return m_angleX == s->m_angleX && m_angleY == s->m_angleY;
  52     }
  53
  54     void apply(TransformationMatrix& transform, const FloatSize&) const override
  55     {
  56         transform.skew(m_angleX, m_angleY);
  57     }
  58
  59     PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) override;
  60     PassRefPtr<TransformOperation> zoom(double factor) final { return this; }
  61
  62     SkewTransformOperation(double angleX, double angleY, OperationType type)
  63         : m_angleX(angleX)
  64         , m_angleY(angleY)
  65         , m_type(type)
  66     {
  67     }
  68
  69     double m_angleX;
  70     double m_angleY;
  71     OperationType m_type;
  72 };
  73
  74 } // namespace blink
  75
  76 #endif // SkewTransformOperation_h