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Side by Side Diff: Source/core/platform/graphics/transforms/RotateTransformOperation.cpp

Issue 45553002: Move remaining classes in graphics/transforms to platform/ (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master
Patch Set: Fix merge problem Created 7 years, 1 month ago
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1 /*
2 * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
3 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 *
20 */
21
22 #include "config.h"
23 #include "core/platform/graphics/transforms/RotateTransformOperation.h"
24
25 #include "platform/animation/AnimationUtilities.h"
26 #include "wtf/MathExtras.h"
27 #include <algorithm>
28
29 using namespace std;
30
31 namespace WebCore {
32
33 PassRefPtr<TransformOperation> RotateTransformOperation::blend(const TransformOp eration* from, double progress, bool blendToIdentity)
34 {
35 if (from && !from->isSameType(*this))
36 return this;
37
38 if (blendToIdentity)
39 return RotateTransformOperation::create(m_x, m_y, m_z, m_angle - m_angle * progress, m_type);
40
41 const RotateTransformOperation* fromOp = static_cast<const RotateTransformOp eration*>(from);
42
43 // Optimize for single axis rotation
44 if (!fromOp || (fromOp->m_x == 0 && fromOp->m_y == 0 && fromOp->m_z == 1) ||
45 (fromOp->m_x == 0 && fromOp->m_y == 1 && fromOp->m_z == 0) ||
46 (fromOp->m_x == 1 && fromOp->m_y == 0 && fromOp->m_z == 0)) {
47 double fromAngle = fromOp ? fromOp->m_angle : 0;
48 return RotateTransformOperation::create(fromOp ? fromOp->m_x : m_x,
49 fromOp ? fromOp->m_y : m_y,
50 fromOp ? fromOp->m_z : m_z,
51 WebCore::blend(fromAngle, m_angl e, progress), m_type);
52 }
53
54 const RotateTransformOperation* toOp = this;
55
56 // Create the 2 rotation matrices
57 TransformationMatrix fromT;
58 TransformationMatrix toT;
59 fromT.rotate3d((fromOp ? fromOp->m_x : 0),
60 (fromOp ? fromOp->m_y : 0),
61 (fromOp ? fromOp->m_z : 1),
62 (fromOp ? fromOp->m_angle : 0));
63
64 toT.rotate3d((toOp ? toOp->m_x : 0),
65 (toOp ? toOp->m_y : 0),
66 (toOp ? toOp->m_z : 1),
67 (toOp ? toOp->m_angle : 0));
68
69 // Blend them
70 toT.blend(fromT, progress);
71
72 // Extract the result as a quaternion
73 TransformationMatrix::DecomposedType decomp;
74 toT.decompose(decomp);
75
76 // Convert that to Axis/Angle form
77 double x = -decomp.quaternionX;
78 double y = -decomp.quaternionY;
79 double z = -decomp.quaternionZ;
80 double length = sqrt(x * x + y * y + z * z);
81 double angle = 0;
82
83 if (length > 0.00001) {
84 x /= length;
85 y /= length;
86 z /= length;
87 angle = rad2deg(acos(decomp.quaternionW) * 2);
88 } else {
89 x = 0;
90 y = 0;
91 z = 1;
92 }
93 return RotateTransformOperation::create(x, y, z, angle, Rotate3D);
94 }
95
96 } // namespace WebCore
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