WebCore/ScaleTransformOperation.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 ScaleTransformOperation_h
  26 #define ScaleTransformOperation_h
  27
  28 #include "TransformOperation.h"
  29
  30 namespace WebCore {
  31
  32 class ScaleTransformOperation : public TransformOperation {
  33 public:
  34     static PassRefPtr<ScaleTransformOperation> create(double sx, double sy, OperationType type)
  35     {
  36         return adoptRef(new ScaleTransformOperation(sx, sy, 1, type));
  37     }
  38
  39     static PassRefPtr<ScaleTransformOperation> create(double sx, double sy, double sz, OperationType type)
  40     {
  41         return adoptRef(new ScaleTransformOperation(sx, sy, sz, type));
  42     }
  43
  44     double x() const { return m_x; }
  45     double y() const { return m_y; }
  46     double z() const { return m_z; }
  47
  48 private:
  49     virtual bool isIdentity() const { return m_x == 1 &&  m_y == 1 &&  m_z == 1; }
  50
  51     virtual OperationType getOperationType() const { return m_type; }
  52     virtual bool isSameType(const TransformOperation& o) const { return o.getOperationType() == m_type; }
  53
  54     virtual bool operator==(const TransformOperation& o) const
  55     {
  56         if (!isSameType(o))
  57             return false;
  58         const ScaleTransformOperation* s = static_cast<const ScaleTransformOperation*>(&o);
  59         return m_x == s->m_x && m_y == s->m_y && m_z == s->m_z;
  60     }
  61
  62     virtual bool apply(TransformationMatrix& transform, const IntSize&) const
  63     {
  64         transform.scale3d(m_x, m_y, m_z);
  65         return false;
  66     }
  67
  68     virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false);
  69
  70     ScaleTransformOperation(double sx, double sy, double sz, OperationType type)
  71         : m_x(sx)
  72         , m_y(sy)
  73         , m_z(sz)
  74         , m_type(type)
  75     {
  76         ASSERT(type == SCALE_X || type == SCALE_Y || type == SCALE_Z || type == SCALE || type == SCALE_3D);
  77     }
  78
  79     double m_x;
  80     double m_y;
  81     double m_z;
  82     OperationType m_type;
  83 };
  84
  85 } // namespace WebCore
  86
  87 #endif // ScaleTransformOperation_h