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      1 /*
      2  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005 Rob Buis <buis (at) kde.org>
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  */
     20 
     21 #ifndef SVGTransform_h
     22 #define SVGTransform_h
     23 
     24 #include "core/platform/graphics/FloatPoint.h"
     25 #include "core/svg/SVGMatrix.h"
     26 #include "wtf/text/WTFString.h"
     27 
     28 namespace WebCore {
     29 
     30 class FloatSize;
     31 
     32 class SVGTransform {
     33 public:
     34     enum SVGTransformType {
     35         SVG_TRANSFORM_UNKNOWN = 0,
     36         SVG_TRANSFORM_MATRIX = 1,
     37         SVG_TRANSFORM_TRANSLATE = 2,
     38         SVG_TRANSFORM_SCALE = 3,
     39         SVG_TRANSFORM_ROTATE = 4,
     40         SVG_TRANSFORM_SKEWX = 5,
     41         SVG_TRANSFORM_SKEWY = 6
     42     };
     43 
     44     enum ConstructionMode {
     45         ConstructIdentityTransform,
     46         ConstructZeroTransform
     47     };
     48 
     49     SVGTransform();
     50     SVGTransform(SVGTransformType, ConstructionMode = ConstructIdentityTransform);
     51     explicit SVGTransform(const AffineTransform&);
     52 
     53     SVGTransformType type() const { return m_type; }
     54 
     55     SVGMatrix& svgMatrix() { return static_cast<SVGMatrix&>(m_matrix); }
     56     AffineTransform matrix() const { return m_matrix; }
     57     void updateSVGMatrix();
     58 
     59     float angle() const { return m_angle; }
     60     FloatPoint rotationCenter() const { return m_center; }
     61 
     62     void setMatrix(const AffineTransform&);
     63     void setTranslate(float tx, float ty);
     64     void setScale(float sx, float sy);
     65     void setRotate(float angle, float cx, float cy);
     66     void setSkewX(float angle);
     67     void setSkewY(float angle);
     68 
     69     // Internal use only (animation system)
     70     FloatPoint translate() const;
     71     FloatSize scale() const;
     72 
     73     bool isValid() const { return m_type != SVG_TRANSFORM_UNKNOWN; }
     74     String valueAsString() const;
     75 
     76     static const String& transformTypePrefixForParsing(SVGTransformType);
     77 
     78 private:
     79     friend bool operator==(const SVGTransform& a, const SVGTransform& b);
     80 
     81     SVGTransformType m_type;
     82     float m_angle;
     83     FloatPoint m_center;
     84     AffineTransform m_matrix;
     85 };
     86 
     87 inline bool operator==(const SVGTransform& a, const SVGTransform& b)
     88 {
     89     return a.m_type == b.m_type && a.m_angle == b.m_angle && a.m_matrix == b.m_matrix;
     90 }
     91 
     92 inline bool operator!=(const SVGTransform& a, const SVGTransform& b)
     93 {
     94     return !(a == b);
     95 }
     96 
     97 } // namespace WebCore
     98 
     99 #endif
    100