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 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#pragma once
27
28#include "Length.h"
29#include "LengthFunctions.h"
30#include "TransformOperation.h"
31#include <wtf/Ref.h>
32
33namespace WebCore {
34
35class PerspectiveTransformOperation final : public TransformOperation {
36public:
37 static Ref<PerspectiveTransformOperation> create(const Length& p)
38 {
39 return adoptRef(*new PerspectiveTransformOperation(p));
40 }
41
42 Ref<TransformOperation> clone() const override
43 {
44 return adoptRef(*new PerspectiveTransformOperation(m_p));
45 }
46
47 Length perspective() const { return m_p; }
48
49private:
50 bool isIdentity() const override { return !floatValueForLength(m_p, 1); }
51 bool isAffectedByTransformOrigin() const override { return !isIdentity(); }
52 bool isRepresentableIn2D() const final { return false; }
53
54 bool operator==(const TransformOperation&) const override;
55
56 bool apply(TransformationMatrix& transform, const FloatSize&) const override
57 {
58 transform.applyPerspective(floatValueForLength(m_p, 1));
59 return false;
60 }
61
62 Ref<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) override;
63
64 void dump(WTF::TextStream&) const final;
65
66 PerspectiveTransformOperation(const Length& p)
67 : TransformOperation(PERSPECTIVE)
68 , m_p(p)
69 {
70 ASSERT(p.isFixed());
71 }
72
73 Length m_p;
74};
75
76} // namespace WebCore
77
78SPECIALIZE_TYPE_TRAITS_TRANSFORMOPERATION(WebCore::PerspectiveTransformOperation, type() == WebCore::TransformOperation::PERSPECTIVE)
79