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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 ScaleTransformOperation_h
     26 #define ScaleTransformOperation_h
     27 
     28 #include "platform/transforms/TransformOperation.h"
     29 
     30 namespace WebCore {
     31 
     32 class PLATFORM_EXPORT 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     virtual bool canBlendWith(const TransformOperation& other) const;
     49 
     50 private:
     51     virtual bool isIdentity() const OVERRIDE { return m_x == 1 &&  m_y == 1 &&  m_z == 1; }
     52 
     53     virtual OperationType type() const OVERRIDE { return m_type; }
     54 
     55     virtual bool operator==(const TransformOperation& o) const OVERRIDE
     56     {
     57         if (!isSameType(o))
     58             return false;
     59         const ScaleTransformOperation* s = static_cast<const ScaleTransformOperation*>(&o);
     60         return m_x == s->m_x && m_y == s->m_y && m_z == s->m_z;
     61     }
     62 
     63     virtual void apply(TransformationMatrix& transform, const FloatSize&) const OVERRIDE
     64     {
     65         transform.scale3d(m_x, m_y, m_z);
     66     }
     67 
     68     virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) OVERRIDE;
     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 == ScaleX || type == ScaleY || type == ScaleZ || type == Scale || type == Scale3D);
     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
     88