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
36 namespace blink {
37
operator ==(const TransformOperation & o) const38 bool 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
apply(TransformationMatrix & transform,const FloatSize & borderBoxSize) const46 void 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
blend(const TransformOperation * from,double progress,bool blendToIdentity)57 PassRefPtr<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