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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 TransformOperations_h
     26 #define TransformOperations_h
     27 
     28 #include "core/platform/graphics/LayoutSize.h"
     29 #include "core/platform/graphics/transforms/TransformOperation.h"
     30 #include "wtf/RefPtr.h"
     31 #include "wtf/Vector.h"
     32 
     33 namespace WebCore {
     34 
     35 class TransformOperations {
     36     WTF_MAKE_FAST_ALLOCATED;
     37 public:
     38     explicit TransformOperations(bool makeIdentity = false);
     39 
     40     bool operator==(const TransformOperations& o) const;
     41     bool operator!=(const TransformOperations& o) const
     42     {
     43         return !(*this == o);
     44     }
     45 
     46     void apply(const FloatSize& sz, TransformationMatrix& t) const
     47     {
     48         for (unsigned i = 0; i < m_operations.size(); ++i)
     49             m_operations[i]->apply(t, sz);
     50     }
     51 
     52     // Return true if any of the operation types are 3D operation types (even if the
     53     // values describe affine transforms)
     54     bool has3DOperation() const
     55     {
     56         for (unsigned i = 0; i < m_operations.size(); ++i)
     57             if (m_operations[i]->is3DOperation())
     58                 return true;
     59         return false;
     60     }
     61 
     62     bool operationsMatch(const TransformOperations&) const;
     63 
     64     void clear()
     65     {
     66         m_operations.clear();
     67     }
     68 
     69     Vector<RefPtr<TransformOperation> >& operations() { return m_operations; }
     70     const Vector<RefPtr<TransformOperation> >& operations() const { return m_operations; }
     71 
     72     size_t size() const { return m_operations.size(); }
     73     const TransformOperation* at(size_t index) const { return index < m_operations.size() ? m_operations.at(index).get() : 0; }
     74 
     75     TransformOperations blendByMatchingOperations(const TransformOperations& from, const double& progress) const;
     76     TransformOperations blendByUsingMatrixInterpolation(const TransformOperations& from, double progress) const;
     77     TransformOperations blend(const TransformOperations& from, double progress) const;
     78 
     79 private:
     80     Vector<RefPtr<TransformOperation> > m_operations;
     81 };
     82 
     83 } // namespace WebCore
     84 
     85 #endif // TransformOperations_h
     86