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 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 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 "HitTestingTransformState.h"
28
29#include "LayoutRect.h"
30
31namespace WebCore {
32
33void HitTestingTransformState::translate(int x, int y, TransformAccumulation accumulate)
34{
35 m_accumulatedTransform.translate(x, y);
36 if (accumulate == FlattenTransform)
37 flattenWithTransform(m_accumulatedTransform);
38
39 m_accumulatingTransform = accumulate == AccumulateTransform;
40}
41
42void HitTestingTransformState::applyTransform(const TransformationMatrix& transformFromContainer, TransformAccumulation accumulate)
43{
44 m_accumulatedTransform.multiply(transformFromContainer);
45 if (accumulate == FlattenTransform)
46 flattenWithTransform(m_accumulatedTransform);
47
48 m_accumulatingTransform = accumulate == AccumulateTransform;
49}
50
51void HitTestingTransformState::flatten()
52{
53 flattenWithTransform(m_accumulatedTransform);
54}
55
56void HitTestingTransformState::flattenWithTransform(const TransformationMatrix& t)
57{
58 if (Optional<TransformationMatrix> inverse = t.inverse()) {
59 m_lastPlanarPoint = inverse.value().projectPoint(m_lastPlanarPoint);
60 m_lastPlanarQuad = inverse.value().projectQuad(m_lastPlanarQuad);
61 m_lastPlanarArea = inverse.value().projectQuad(m_lastPlanarArea);
62 }
63
64 m_accumulatedTransform.makeIdentity();
65 m_accumulatingTransform = false;
66}
67
68FloatPoint HitTestingTransformState::mappedPoint() const
69{
70 if (auto inverse = m_accumulatedTransform.inverse())
71 return inverse.value().projectPoint(m_lastPlanarPoint);
72 return m_lastPlanarPoint;
73}
74
75FloatQuad HitTestingTransformState::mappedQuad() const
76{
77 if (auto inverse = m_accumulatedTransform.inverse())
78 return inverse.value().projectQuad(m_lastPlanarQuad);
79 return m_lastPlanarQuad;
80}
81
82FloatQuad HitTestingTransformState::mappedArea() const
83{
84 if (auto inverse = m_accumulatedTransform.inverse())
85 return inverse.value().projectQuad(m_lastPlanarArea);
86 return m_lastPlanarArea;
87}
88
89LayoutRect HitTestingTransformState::boundsOfMappedArea() const
90{
91 if (auto inverse = m_accumulatedTransform.inverse())
92 return inverse.value().clampedBoundsOfProjectedQuad(m_lastPlanarArea);
93 TransformationMatrix identity;
94 return identity.clampedBoundsOfProjectedQuad(m_lastPlanarArea);
95}
96
97} // namespace WebCore
98