1 /* 2 * Copyright (C) 2009 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef PerspectiveTransformOperation_h 27 #define PerspectiveTransformOperation_h 28 29 #include "Length.h" 30 #include "TransformOperation.h" 31 32 namespace WebCore { 33 34 class PerspectiveTransformOperation : public TransformOperation { 35 public: 36 static PassRefPtr<PerspectiveTransformOperation> create(const Length& p) 37 { 38 return adoptRef(new PerspectiveTransformOperation(p)); 39 } 40 41 Length perspective() const { return m_p; } 42 43 private: 44 virtual bool isIdentity() const { return m_p.calcFloatValue(1) == 0; } 45 virtual OperationType getOperationType() const { return PERSPECTIVE; } 46 virtual bool isSameType(const TransformOperation& o) const { return o.getOperationType() == PERSPECTIVE; } 47 48 virtual bool operator==(const TransformOperation& o) const 49 { 50 if (!isSameType(o)) 51 return false; 52 const PerspectiveTransformOperation* p = static_cast<const PerspectiveTransformOperation*>(&o); 53 return m_p == p->m_p; 54 } 55 56 virtual bool apply(TransformationMatrix& transform, const IntSize&) const 57 { 58 transform.applyPerspective(m_p.calcFloatValue(1)); 59 return false; 60 } 61 62 virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false); 63 64 PerspectiveTransformOperation(const Length& p) 65 : m_p(p) 66 { 67 ASSERT(p.isFixed()); 68 } 69 70 Length m_p; 71 }; 72 73 } // namespace WebCore 74 75 #endif // PerspectiveTransformOperation_h 76