third_party/WebKit/Source/platform/transforms/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 "platform/transforms/TransformOperation.h"
  29
  30 namespace blink {
  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     void apply(TransformationMatrix& transform, const FloatSize&) const override
  51     {
  52         transform.scale3d(m_x, m_y, m_z);
  53     }
  54     PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) override;
  55
  56     static bool isMatchingOperationType(OperationType type) { return type == Scale || type == ScaleX || type == ScaleY || type == ScaleZ || type == Scale3D; }
  57
  58 private:
  59     OperationType type() const override { return m_type; }
  60
  61     bool operator==(const TransformOperation& o) const override
  62     {
  63         if (!isSameType(o))
  64             return false;
  65         const ScaleTransformOperation* s = static_cast<const ScaleTransformOperation*>(&o);
  66         return m_x == s->m_x && m_y == s->m_y && m_z == s->m_z;
  67     }
  68
  69     PassRefPtr<TransformOperation> zoom(double factor) final { return this; }
  70
  71     ScaleTransformOperation(double sx, double sy, double sz, OperationType type)
  72         : m_x(sx)
  73         , m_y(sy)
  74         , m_z(sz)
  75         , m_type(type)
  76     {
  77         ASSERT(isMatchingOperationType(type));
  78     }
  79
  80     double m_x;
  81     double m_y;
  82     double m_z;
  83     OperationType m_type;
  84 };
  85
  86 DEFINE_TRANSFORM_TYPE_CASTS(ScaleTransformOperation);
  87
  88 } // namespace blink
  89
  90 #endif // ScaleTransformOperation_h