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
32namespace blink {
33
34AffineTransform 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 blink
63