WebCore/rendering/style/TransformOperation.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 TransformOperation_h
  26 #define TransformOperation_h
  27
  28 #include "AffineTransform.h"
  29 #include "IntSize.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         SCALE_X, SCALE_Y, SCALE,
  41         TRANSLATE_X, TRANSLATE_Y, TRANSLATE,
  42         ROTATE,
  43         SKEW_X, SKEW_Y, SKEW,
  44         MATRIX, IDENTITY, NONE
  45     };
  46
  47     virtual ~TransformOperation() { }
  48
  49     virtual bool operator==(const TransformOperation&) const = 0;
  50     bool operator!=(const TransformOperation& o) const { return !(*this == o); }
  51
  52     virtual bool isIdentity() const = 0;
  53
  54     virtual bool apply(AffineTransform&, const IntSize& borderBoxSize) const = 0;
  55
  56     virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) = 0;
  57
  58     virtual OperationType getOperationType() const = 0;
  59     virtual bool isSameType(const TransformOperation& o) const { return false; }
  60 };
  61
  62 } // namespace WebCore
  63
  64 #endif // TransformOperation_h