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 "ImageOrientation.h"
29
30#include "AffineTransform.h"
31#include "FloatSize.h"
32
33namespace WebCore {
34
35AffineTransform ImageOrientation::transformFromDefault(const FloatSize& drawnSize) const
36{
37 float w = drawnSize.width();
38 float h = drawnSize.height();
39
40 switch (m_orientation) {
41 case OriginTopLeft:
42 return AffineTransform();
43 case OriginTopRight:
44 return AffineTransform(-1, 0, 0, 1, w, 0);
45 case OriginBottomRight:
46 return AffineTransform(-1, 0, 0, -1, w, h);
47 case OriginBottomLeft:
48 return AffineTransform( 1, 0, 0, -1, 0, h);
49 case OriginLeftTop:
50 return AffineTransform( 0, 1, 1, 0, 0, 0);
51 case OriginRightTop:
52 return AffineTransform( 0, 1, -1, 0, w, 0);
53 case OriginRightBottom:
54 return AffineTransform( 0, -1, -1, 0, w, h);
55 case OriginLeftBottom:
56 return AffineTransform( 0, -1, 1, 0, 0, h);
57 }
58
59 ASSERT_NOT_REACHED();
60 return AffineTransform();
61}
62
63} // namespace WebCore
64