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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 "config.h"
#include "core/platform/graphics/transforms/TransformOperations.h"
#include <algorithm>
#include "core/platform/graphics/transforms/IdentityTransformOperation.h"
#include "core/platform/graphics/transforms/InterpolatedTransformOperation.h"
using namespace std;
namespace WebCore {
TransformOperations::TransformOperations(bool makeIdentity)
{
if (makeIdentity)
m_operations.append(IdentityTransformOperation::create());
}
bool TransformOperations::operator==(const TransformOperations& o) const
{
if (m_operations.size() != o.m_operations.size())
return false;
unsigned s = m_operations.size();
for (unsigned i = 0; i < s; i++) {
if (*m_operations[i] != *o.m_operations[i])
return false;
}
return true;
}
bool TransformOperations::operationsMatch(const TransformOperations& other) const
{
size_t numOperations = operations().size();
// If the sizes of the function lists don't match, the lists don't match
if (numOperations != other.operations().size())
return false;
// If the types of each function are not the same, the lists don't match
for (size_t i = 0; i < numOperations; ++i) {
if (!operations()[i]->isSameType(*other.operations()[i]))
return false;
}
return true;
}
TransformOperations TransformOperations::blendByMatchingOperations(const TransformOperations& from, const double& progress) const
{
TransformOperations result;
unsigned fromSize = from.operations().size();
unsigned toSize = operations().size();
unsigned size = max(fromSize, toSize);
for (unsigned i = 0; i < size; i++) {
RefPtr<TransformOperation> fromOperation = (i < fromSize) ? from.operations()[i].get() : 0;
RefPtr<TransformOperation> toOperation = (i < toSize) ? operations()[i].get() : 0;
RefPtr<TransformOperation> blendedOperation = toOperation ? toOperation->blend(fromOperation.get(), progress) : (fromOperation ? fromOperation->blend(0, progress, true) : 0);
if (blendedOperation)
result.operations().append(blendedOperation);
else {
RefPtr<TransformOperation> identityOperation = IdentityTransformOperation::create();
if (progress > 0.5)
result.operations().append(toOperation ? toOperation : identityOperation);
else
result.operations().append(fromOperation ? fromOperation : identityOperation);
}
}
return result;
}
TransformOperations TransformOperations::blendByUsingMatrixInterpolation(const TransformOperations& from, double progress) const
{
TransformOperations result;
result.operations().append(InterpolatedTransformOperation::create(from, *this, progress));
return result;
}
TransformOperations TransformOperations::blend(const TransformOperations& from, double progress) const
{
if (from == *this)
return *this;
if (from.size() && from.operationsMatch(*this))
return blendByMatchingOperations(from, progress);
return blendByUsingMatrixInterpolation(from, progress);
}
} // namespace WebCore
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