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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "platform/transforms/InterpolatedTransformOperation.h"
#include "platform/transforms/IdentityTransformOperation.h"
namespace blink {
bool InterpolatedTransformOperation::operator==(
const TransformOperation& o) const {
if (!isSameType(o))
return false;
const InterpolatedTransformOperation* t =
static_cast<const InterpolatedTransformOperation*>(&o);
return progress == t->progress && from == t->from && to == t->to;
}
void InterpolatedTransformOperation::apply(
TransformationMatrix& transform,
const FloatSize& borderBoxSize) const {
TransformationMatrix fromTransform;
TransformationMatrix toTransform;
from.apply(borderBoxSize, fromTransform);
to.apply(borderBoxSize, toTransform);
toTransform.blend(fromTransform, progress);
transform.multiply(toTransform);
}
PassRefPtr<TransformOperation> InterpolatedTransformOperation::blend(
const TransformOperation* from,
double progress,
bool blendToIdentity) {
if (from && !from->isSameType(*this))
return this;
TransformOperations thisOperations;
thisOperations.operations().push_back(this);
TransformOperations fromOperations;
if (blendToIdentity)
fromOperations.operations().push_back(IdentityTransformOperation::create());
else
fromOperations.operations().push_back(
const_cast<TransformOperation*>(from));
return InterpolatedTransformOperation::create(thisOperations, fromOperations,
progress);
}
} // namespace blink
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