| /* |
| * 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); |
| } |
| |
| TransformOperations TransformOperations::add(const TransformOperations& addend) const |
| { |
| TransformOperations result; |
| result.m_operations = operations(); |
| result.m_operations.append(addend.operations()); |
| return result; |
| } |
| |
| } // namespace WebCore |