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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 TransformOperation_h
     26 #define TransformOperation_h
     27 
     28 #include "core/platform/graphics/FloatSize.h"
     29 #include "core/platform/graphics/transforms/TransformationMatrix.h"
     30 #include "wtf/PassRefPtr.h"
     31 #include "wtf/RefCounted.h"
     32 
     33 namespace WebCore {
     34 
     35 // CSS Transforms (may become part of CSS3)
     36 
     37 class TransformOperation : public RefCounted<TransformOperation> {
     38 public:
     39     enum OperationType {
     40         ScaleX, ScaleY, Scale,
     41         TranslateX, TranslateY, Translate,
     42         Rotate,
     43         RotateZ = Rotate,
     44         SkewX, SkewY, Skew,
     45         Matrix,
     46         ScaleZ, Scale3D,
     47         TranslateZ, Translate3D,
     48         RotateX, RotateY, Rotate3D,
     49         Matrix3D,
     50         Perspective,
     51         Interpolated,
     52         Identity, None
     53     };
     54 
     55     virtual ~TransformOperation() { }
     56 
     57     virtual bool operator==(const TransformOperation&) const = 0;
     58     bool operator!=(const TransformOperation& o) const { return !(*this == o); }
     59 
     60     virtual bool isIdentity() const = 0;
     61 
     62     // Return true if the borderBoxSize was used in the computation, false otherwise.
     63     virtual bool apply(TransformationMatrix&, const FloatSize& borderBoxSize) const = 0;
     64 
     65     virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) = 0;
     66 
     67     virtual OperationType getOperationType() const = 0;
     68     virtual bool isSameType(const TransformOperation&) const { return false; }
     69 
     70     bool is3DOperation() const
     71     {
     72         OperationType opType = getOperationType();
     73         return opType == ScaleZ
     74             || opType == Scale3D
     75             || opType == TranslateZ
     76             || opType == Translate3D
     77             || opType == RotateX
     78             || opType == RotateY
     79             || opType == Rotate3D
     80             || opType == Matrix3D
     81             || opType == Perspective
     82             || opType == Interpolated;
     83     }
     84 };
     85 
     86 } // namespace WebCore
     87 
     88 #endif // TransformOperation_h
     89