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/*
* Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "platform/transforms/RotateTransformOperation.h"
#include "platform/animation/AnimationUtilities.h"
namespace blink {
bool RotateTransformOperation::operator==(
const TransformOperation& other) const {
if (!isSameType(other))
return false;
const Rotation& otherRotation = toRotateTransformOperation(other).m_rotation;
return m_rotation.axis == otherRotation.axis &&
m_rotation.angle == otherRotation.angle;
}
bool RotateTransformOperation::getCommonAxis(const RotateTransformOperation* a,
const RotateTransformOperation* b,
FloatPoint3D& resultAxis,
double& resultAngleA,
double& resultAngleB) {
return Rotation::getCommonAxis(a ? a->m_rotation : Rotation(),
b ? b->m_rotation : Rotation(), resultAxis,
resultAngleA, resultAngleB);
}
PassRefPtr<TransformOperation> RotateTransformOperation::blend(
const TransformOperation* from,
double progress,
bool blendToIdentity) {
if (from && !from->isSameType(*this))
return this;
if (blendToIdentity)
return RotateTransformOperation::create(
Rotation(axis(), angle() * (1 - progress)), m_type);
// Optimize for single axis rotation
if (!from)
return RotateTransformOperation::create(
Rotation(axis(), angle() * progress), m_type);
const RotateTransformOperation& fromRotate =
toRotateTransformOperation(*from);
if (type() == Rotate3D) {
return RotateTransformOperation::create(
Rotation::slerp(fromRotate.m_rotation, m_rotation, progress), Rotate3D);
}
ASSERT(axis() == fromRotate.axis());
return RotateTransformOperation::create(
Rotation(axis(), blink::blend(fromRotate.angle(), angle(), progress)),
m_type);
}
bool RotateTransformOperation::canBlendWith(
const TransformOperation& other) const {
return other.isSameType(*this);
}
RotateAroundOriginTransformOperation::RotateAroundOriginTransformOperation(
double angle,
double originX,
double originY)
: RotateTransformOperation(Rotation(FloatPoint3D(0, 0, 1), angle),
RotateAroundOrigin),
m_originX(originX),
m_originY(originY) {}
void RotateAroundOriginTransformOperation::apply(
TransformationMatrix& transform,
const FloatSize& boxSize) const {
transform.translate(m_originX, m_originY);
RotateTransformOperation::apply(transform, boxSize);
transform.translate(-m_originX, -m_originY);
}
bool RotateAroundOriginTransformOperation::operator==(
const TransformOperation& other) const {
if (!isSameType(other))
return false;
const RotateAroundOriginTransformOperation& otherRotate =
toRotateAroundOriginTransformOperation(other);
const Rotation& otherRotation = otherRotate.m_rotation;
return m_rotation.axis == otherRotation.axis &&
m_rotation.angle == otherRotation.angle &&
m_originX == otherRotate.m_originX &&
m_originY == otherRotate.m_originY;
}
PassRefPtr<TransformOperation> RotateAroundOriginTransformOperation::blend(
const TransformOperation* from,
double progress,
bool blendToIdentity) {
if (from && !from->isSameType(*this))
return this;
if (blendToIdentity) {
return RotateAroundOriginTransformOperation::create(
angle() * (1 - progress), m_originX, m_originY);
}
if (!from) {
return RotateAroundOriginTransformOperation::create(angle() * progress,
m_originX, m_originY);
}
const RotateAroundOriginTransformOperation& fromRotate =
toRotateAroundOriginTransformOperation(*from);
return RotateAroundOriginTransformOperation::create(
blink::blend(fromRotate.angle(), angle(), progress),
blink::blend(fromRotate.m_originX, m_originX, progress),
blink::blend(fromRotate.m_originY, m_originY, progress));
}
PassRefPtr<TransformOperation> RotateAroundOriginTransformOperation::zoom(
double factor) {
return create(angle(), m_originX * factor, m_originY * factor);
}
} // namespace blink
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