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/*
* Copyright (c) 2010, 2015, 2017 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: William Wang
* Ali Saidi
* Chris Emmons
* Andreas Sandberg
*/
#include "base/bmpwriter.hh"
#include <cassert>
#include "base/logging.hh"
const char* BmpWriter::_imgExtension = "bmp";
// bitmap class ctor
BmpWriter::BmpWriter(const FrameBuffer *_fb)
: ImgWriter(_fb)
{
}
const BmpWriter::CompleteV1Header
BmpWriter::getCompleteHeader() const
{
const uint32_t pixel_array_size(sizeof(PixelType) * fb.area());
const uint32_t file_size(sizeof(CompleteV1Header) + pixel_array_size);
const CompleteV1Header header = {
// File header
{
{'B','M'}, /* Magic */
file_size,
0, 0, /* Reserved */
sizeof(CompleteV1Header) /* Offset to pixel array */
},
// Info/DIB header
{
sizeof(InfoHeaderV1),
fb.width(),
fb.height(),
1, /* Color planes */
32, /* Bits per pixel */
0, /* No compression */
pixel_array_size, /* Image size in bytes */
2835, /* x pixels per meter (assume 72 DPI) */
2835, /* y pixels per meter (assume 72 DPI) */
0, /* Colors in color table */
0 /* Important color count (0 == all are important) */
}
};
return header;
}
void
BmpWriter::write(std::ostream &bmp) const
{
const CompleteV1Header header(getCompleteHeader());
// 1. write the header
bmp.write(reinterpret_cast<const char *>(&header), sizeof(header));
// 2. write the bitmap data
// BMP start store data left to right starting with the bottom row
// so we need to do some creative flipping
std::vector<PixelType> line_buffer(fb.width());
for (int y = 0; y < fb.height(); ++y) {
for (unsigned x = 0; x < fb.width(); ++x)
line_buffer[x] = fb.pixel(x, fb.height() - y - 1);
bmp.write(reinterpret_cast<const char *>(line_buffer.data()),
line_buffer.size() * sizeof(line_buffer[0]));
}
bmp.flush();
}
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