1/*
2 * Copyright (c) 2010, 2015, 2017 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: William Wang
38 *          Ali Saidi
39 *          Chris Emmons
40 *          Andreas Sandberg
41 */
42
43#include "base/bmpwriter.hh"
44
45#include <cassert>
46
47#include "base/logging.hh"
48
49const char* BmpWriter::_imgExtension = "bmp";
50
51// bitmap class ctor
52BmpWriter::BmpWriter(const FrameBuffer *_fb)
53    : ImgWriter(_fb)
54{
55}
56
57const BmpWriter::CompleteV1Header
58BmpWriter::getCompleteHeader() const
59{
60    const uint32_t pixel_array_size(sizeof(PixelType) * fb.area());
61    const uint32_t file_size(sizeof(CompleteV1Header) + pixel_array_size);
62
63    const CompleteV1Header header = {
64        // File header
65        {
66            {'B','M'}, /* Magic */
67            file_size,
68            0, 0, /* Reserved */
69            sizeof(CompleteV1Header) /* Offset to pixel array */
70        },
71        // Info/DIB header
72        {
73            sizeof(InfoHeaderV1),
74            fb.width(),
75            fb.height(),
76            1, /* Color planes */
77            32, /* Bits per pixel */
78            0, /* No compression */
79            pixel_array_size, /* Image size in bytes */
80            2835, /* x pixels per meter (assume 72 DPI) */
81            2835, /* y pixels per meter (assume 72 DPI) */
82            0, /* Colors in color table */
83            0 /* Important color count (0 == all are important) */
84        }
85    };
86
87    return header;
88}
89
90void
91BmpWriter::write(std::ostream &bmp) const
92{
93    const CompleteV1Header header(getCompleteHeader());
94
95    // 1.  write the header
96    bmp.write(reinterpret_cast<const char *>(&header), sizeof(header));
97
98    // 2.  write the bitmap data
99    // BMP start store data left to right starting with the bottom row
100    // so we need to do some creative flipping
101    std::vector<PixelType> line_buffer(fb.width());
102    for (int y = 0; y < fb.height(); ++y) {
103        for (unsigned x = 0; x < fb.width(); ++x)
104            line_buffer[x] = fb.pixel(x, fb.height() - y - 1);
105
106        bmp.write(reinterpret_cast<const char *>(line_buffer.data()),
107                  line_buffer.size() * sizeof(line_buffer[0]));
108    }
109
110    bmp.flush();
111}
112
113
114