WebCore/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 "TransformOperation.h"
  29
  30 namespace WebCore {
  31
  32 class 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 private:
  40     virtual bool isIdentity() const { return m_angleX == 0 && m_angleY == 0; }
  41     virtual OperationType getOperationType() const { return m_type; }
  42     virtual bool isSameType(const TransformOperation& o) const { return o.getOperationType() == m_type; }
  43
  44     virtual bool operator==(const TransformOperation& o) const
  45     {
  46         if (!isSameType(o))
  47             return false;
  48         const SkewTransformOperation* s = static_cast<const SkewTransformOperation*>(&o);
  49         return m_angleX == s->m_angleX && m_angleY == s->m_angleY;
  50     }
  51
  52     virtual bool apply(TransformationMatrix& transform, const IntSize&) const
  53     {
  54         transform.skew(m_angleX, m_angleY);
  55         return false;
  56     }
  57
  58     virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false);
  59
  60     SkewTransformOperation(double angleX, double angleY, OperationType type)
  61         : m_angleX(angleX)
  62         , m_angleY(angleY)
  63         , m_type(type)
  64     {
  65     }
  66
  67     double m_angleX;
  68     double m_angleY;
  69     OperationType m_type;
  70 };
  71
  72 } // namespace WebCore
  73
  74 #endif // SkewTransformOperation_h