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 #include "config.h" 27 #include "core/rendering/HitTestingTransformState.h" 28 29 #include "core/platform/graphics/LayoutRect.h" 30 #include "wtf/PassOwnPtr.h" 31 32 namespace WebCore { 33 34 void HitTestingTransformState::translate(int x, int y, TransformAccumulation accumulate) 35 { 36 m_accumulatedTransform.translate(x, y); 37 if (accumulate == FlattenTransform) 38 flattenWithTransform(m_accumulatedTransform); 39 40 m_accumulatingTransform = accumulate == AccumulateTransform; 41 } 42 43 void HitTestingTransformState::applyTransform(const TransformationMatrix& transformFromContainer, TransformAccumulation accumulate) 44 { 45 m_accumulatedTransform.multiply(transformFromContainer); 46 if (accumulate == FlattenTransform) 47 flattenWithTransform(m_accumulatedTransform); 48 49 m_accumulatingTransform = accumulate == AccumulateTransform; 50 } 51 52 void HitTestingTransformState::flatten() 53 { 54 flattenWithTransform(m_accumulatedTransform); 55 } 56 57 void HitTestingTransformState::flattenWithTransform(const TransformationMatrix& t) 58 { 59 TransformationMatrix inverseTransform = t.inverse(); 60 m_lastPlanarPoint = inverseTransform.projectPoint(m_lastPlanarPoint); 61 m_lastPlanarQuad = inverseTransform.projectQuad(m_lastPlanarQuad); 62 m_lastPlanarArea = inverseTransform.projectQuad(m_lastPlanarArea); 63 64 m_accumulatedTransform.makeIdentity(); 65 m_accumulatingTransform = false; 66 } 67 68 FloatPoint HitTestingTransformState::mappedPoint() const 69 { 70 return m_accumulatedTransform.inverse().projectPoint(m_lastPlanarPoint); 71 } 72 73 FloatQuad HitTestingTransformState::mappedQuad() const 74 { 75 return m_accumulatedTransform.inverse().projectQuad(m_lastPlanarQuad); 76 } 77 78 FloatQuad HitTestingTransformState::mappedArea() const 79 { 80 return m_accumulatedTransform.inverse().projectQuad(m_lastPlanarArea); 81 } 82 83 LayoutRect HitTestingTransformState::boundsOfMappedArea() const 84 { 85 return m_accumulatedTransform.inverse().clampedBoundsOfProjectedQuad(m_lastPlanarArea); 86 } 87 88 } // namespace WebCore 89
