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      1 
      2 /*
      3  * Copyright (C) 2010 Google Inc. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1.  Redistributions of source code must retain the above copyright
     10  *     notice, this list of conditions and the following disclaimer.
     11  * 2.  Redistributions in binary form must reproduce the above copyright
     12  *     notice, this list of conditions and the following disclaimer in the
     13  *     documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     19  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     22  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include "config.h"
     28 #include "platform/graphics/ImageOrientation.h"
     29 
     30 #include "platform/transforms/AffineTransform.h"
     31 
     32 namespace WebCore {
     33 
     34 AffineTransform ImageOrientation::transformFromDefault(const FloatSize& drawnSize) const
     35 {
     36     float w = drawnSize.width();
     37     float h = drawnSize.height();
     38 
     39     switch (m_orientation) {
     40     case OriginTopLeft:
     41         return AffineTransform();
     42     case OriginTopRight:
     43         return AffineTransform(-1,  0,  0,  1,  w, 0);
     44     case OriginBottomRight:
     45         return AffineTransform(-1,  0,  0, -1,  w, h);
     46     case OriginBottomLeft:
     47         return AffineTransform( 1,  0,  0, -1,  0, h);
     48     case OriginLeftTop:
     49         return AffineTransform( 0,  1,  1,  0,  0, 0);
     50     case OriginRightTop:
     51         return AffineTransform( 0,  1, -1,  0,  w, 0);
     52     case OriginRightBottom:
     53         return AffineTransform( 0, -1, -1,  0,  w, h);
     54     case OriginLeftBottom:
     55         return AffineTransform( 0, -1,  1,  0,  0, h);
     56     }
     57 
     58     ASSERT_NOT_REACHED();
     59     return AffineTransform();
     60 }
     61 
     62 } // namespace WebCore
     63