| /* |
| * 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 "third_party/blink/renderer/platform/transforms/matrix_transform_operation.h" |
| |
| #include <algorithm> |
| |
| namespace blink { |
| |
| scoped_refptr<TransformOperation> MatrixTransformOperation::Blend( |
| const TransformOperation* from, |
| double progress, |
| bool blend_to_identity) { |
| if (from && !from->IsSameType(*this)) |
| return this; |
| |
| // convert the TransformOperations into matrices |
| TransformationMatrix from_t; |
| TransformationMatrix to_t(a_, b_, c_, d_, e_, f_); |
| if (!to_t.IsInvertible()) |
| return nullptr; |
| if (from) { |
| const MatrixTransformOperation* m = |
| static_cast<const MatrixTransformOperation*>(from); |
| from_t.SetMatrix(m->a_, m->b_, m->c_, m->d_, m->e_, m->f_); |
| if (!from_t.IsInvertible()) |
| return nullptr; |
| } |
| |
| if (blend_to_identity) |
| std::swap(from_t, to_t); |
| |
| to_t.Blend(from_t, progress); |
| return MatrixTransformOperation::Create(to_t.A(), to_t.B(), to_t.C(), |
| to_t.D(), to_t.E(), to_t.F()); |
| } |
| |
| scoped_refptr<TransformOperation> MatrixTransformOperation::Zoom( |
| double factor) { |
| return Create(a_, b_, c_, d_, e_ * factor, f_ * factor); |
| } |
| |
| } // namespace blink |