1/*
2 * Copyright (C) 2013 Google 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "platform/transforms/InterpolatedTransformOperation.h"
33
34#include "platform/transforms/IdentityTransformOperation.h"
35
36namespace blink {
37
38bool InterpolatedTransformOperation::operator==(const TransformOperation& o) const
39{
40    if (!isSameType(o))
41        return false;
42    const InterpolatedTransformOperation* t = static_cast<const InterpolatedTransformOperation*>(&o);
43    return progress == t->progress && from == t->from && to == t->to;
44}
45
46void InterpolatedTransformOperation::apply(TransformationMatrix& transform, const FloatSize& borderBoxSize) const
47{
48    TransformationMatrix fromTransform;
49    TransformationMatrix toTransform;
50    from.apply(borderBoxSize, fromTransform);
51    to.apply(borderBoxSize, toTransform);
52
53    toTransform.blend(fromTransform, progress);
54    transform.multiply(toTransform);
55}
56
57PassRefPtr<TransformOperation> InterpolatedTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity)
58{
59    if (from && !from->isSameType(*this))
60        return this;
61
62    TransformOperations thisOperations;
63    thisOperations.operations().append(this);
64    TransformOperations fromOperations;
65    if (blendToIdentity)
66        fromOperations.operations().append(IdentityTransformOperation::create());
67    else
68        fromOperations.operations().append(const_cast<TransformOperation*>(from));
69    return InterpolatedTransformOperation::create(thisOperations, fromOperations, progress);
70}
71
72} // namespace blink
73
74