third_party/WebKit/Source/platform/transforms/Matrix3DTransformOperation.cpp

   1 /*
   2  * Copyright (C) 2009 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "platform/transforms/Matrix3DTransformOperation.h"
  28
  29 #include <algorithm>
  30
  31 namespace blink {
  32
  33 PassRefPtr<TransformOperation> Matrix3DTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity)
  34 {
  35     if (from && !from->isSameType(*this))
  36         return this;
  37
  38     // Convert the TransformOperations into matrices
  39     FloatSize size;
  40     TransformationMatrix fromT;
  41     TransformationMatrix toT;
  42     if (from)
  43         from->apply(fromT, size);
  44
  45     apply(toT, size);
  46
  47     if (blendToIdentity)
  48         std::swap(fromT, toT);
  49
  50     toT.blend(fromT, progress);
  51     return Matrix3DTransformOperation::create(toT);
  52 }
  53
  54 PassRefPtr<TransformOperation> Matrix3DTransformOperation::zoom(double factor)
  55 {
  56     TransformationMatrix result = m_matrix;
  57     result.setM41(result.m41() * factor);
  58     result.setM42(result.m42() * factor);
  59     return create(result);
  60 }
  61
  62 } // namespace blink