1 /* 2 * Copyright (C) 2011 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 COMPUTER, 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 HitTestingTransformState_h 27 #define HitTestingTransformState_h 28 29 #include "platform/geometry/FloatQuad.h" 30 #include "platform/geometry/FloatPoint.h" 31 #include "platform/geometry/IntSize.h" 32 #include "platform/transforms/AffineTransform.h" 33 #include "platform/transforms/TransformationMatrix.h" 34 #include "wtf/PassRefPtr.h" 35 #include "wtf/RefCounted.h" 36 37 namespace WebCore { 38 39 // FIXME: Now that TransformState lazily creates its TransformationMatrix it takes up less space. 40 // So there's really no need for a ref counted version. So This class should be removed and replaced 41 // with TransformState. There are some minor differences (like the way translate() works slightly 42 // differently than move()) so care has to be taken when this is done. 43 class HitTestingTransformState : public RefCounted<HitTestingTransformState> { 44 public: create(const FloatPoint & p,const FloatQuad & quad,const FloatQuad & area)45 static PassRefPtr<HitTestingTransformState> create(const FloatPoint& p, const FloatQuad& quad, const FloatQuad& area) 46 { 47 return adoptRef(new HitTestingTransformState(p, quad, area)); 48 } 49 create(const HitTestingTransformState & other)50 static PassRefPtr<HitTestingTransformState> create(const HitTestingTransformState& other) 51 { 52 return adoptRef(new HitTestingTransformState(other)); 53 } 54 55 enum TransformAccumulation { FlattenTransform, AccumulateTransform }; 56 void translate(int x, int y, TransformAccumulation); 57 void applyTransform(const TransformationMatrix& transformFromContainer, TransformAccumulation); 58 59 FloatPoint mappedPoint() const; 60 FloatQuad mappedQuad() const; 61 FloatQuad mappedArea() const; 62 LayoutRect boundsOfMappedArea() const; 63 void flatten(); 64 65 FloatPoint m_lastPlanarPoint; 66 FloatQuad m_lastPlanarQuad; 67 FloatQuad m_lastPlanarArea; 68 TransformationMatrix m_accumulatedTransform; 69 bool m_accumulatingTransform; 70 71 private: HitTestingTransformState(const FloatPoint & p,const FloatQuad & quad,const FloatQuad & area)72 HitTestingTransformState(const FloatPoint& p, const FloatQuad& quad, const FloatQuad& area) 73 : m_lastPlanarPoint(p) 74 , m_lastPlanarQuad(quad) 75 , m_lastPlanarArea(area) 76 , m_accumulatingTransform(false) 77 { 78 } 79 HitTestingTransformState(const HitTestingTransformState & other)80 HitTestingTransformState(const HitTestingTransformState& other) 81 : RefCounted<HitTestingTransformState>() 82 , m_lastPlanarPoint(other.m_lastPlanarPoint) 83 , m_lastPlanarQuad(other.m_lastPlanarQuad) 84 , m_lastPlanarArea(other.m_lastPlanarArea) 85 , m_accumulatedTransform(other.m_accumulatedTransform) 86 , m_accumulatingTransform(other.m_accumulatingTransform) 87 { 88 } 89 90 void flattenWithTransform(const TransformationMatrix&); 91 }; 92 93 } // namespace WebCore 94 95 #endif // HitTestingTransformState_h 96