WebCore/MatrixTransformOperation.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 MatrixTransformOperation_h
  26 #define MatrixTransformOperation_h
  27
  28 #include "TransformOperation.h"
  29 #include "TransformationMatrix.h"
  30
  31 namespace WebCore {
  32
  33 class MatrixTransformOperation : public TransformOperation {
  34 public:
  35     static PassRefPtr<MatrixTransformOperation> create(double a, double b, double c, double d, double e, double f)
  36     {
  37         return adoptRef(new MatrixTransformOperation(a, b, c, d, e, f));
  38     }
  39
  40     static PassRefPtr<MatrixTransformOperation> create(const TransformationMatrix& t)
  41     {
  42         return adoptRef(new MatrixTransformOperation(t));
  43     }
  44
  45 private:
  46     virtual bool isIdentity() const { return m_a == 1 && m_b == 0 && m_c == 0 && m_d == 1 && m_e == 0 && m_f == 0; }
  47
  48     virtual OperationType getOperationType() const { return MATRIX; }
  49     virtual bool isSameType(const TransformOperation& o) const { return o.getOperationType() == MATRIX; }
  50
  51     virtual bool operator==(const TransformOperation& o) const
  52     {
  53         if (!isSameType(o))
  54             return false;
  55
  56         const MatrixTransformOperation* m = static_cast<const MatrixTransformOperation*>(&o);
  57         return m_a == m->m_a && m_b == m->m_b && m_c == m->m_c && m_d == m->m_d && m_e == m->m_e && m_f == m->m_f;
  58     }
  59
  60     virtual bool apply(TransformationMatrix& transform, const IntSize&) const
  61     {
  62         TransformationMatrix matrix(m_a, m_b, m_c, m_d, m_e, m_f);
  63         transform.multLeft(TransformationMatrix(matrix));
  64         return false;
  65     }
  66
  67     virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false);
  68
  69     MatrixTransformOperation(double a, double b, double c, double d, double e, double f)
  70         : m_a(a)
  71         , m_b(b)
  72         , m_c(c)
  73         , m_d(d)
  74         , m_e(e)
  75         , m_f(f)
  76     {
  77     }
  78
  79     MatrixTransformOperation(const TransformationMatrix& t)
  80         : m_a(t.a())
  81         , m_b(t.b())
  82         , m_c(t.c())
  83         , m_d(t.d())
  84         , m_e(t.e())
  85         , m_f(t.f())
  86     {
  87     }
  88
  89     double m_a;
  90     double m_b;
  91     double m_c;
  92     double m_d;
  93     double m_e;
  94     double m_f;
  95 };
  96
  97 } // namespace WebCore
  98
  99 #endif // MatrixTransformOperation_h