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Diffstat (limited to 'src/base/bmpwriter.cc')
| -rw-r--r-- | src/base/bmpwriter.cc | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/base/bmpwriter.cc b/src/base/bmpwriter.cc new file mode 100644 index 000000000..f650074ab --- /dev/null +++ b/src/base/bmpwriter.cc @@ -0,0 +1,113 @@ +/* + * 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/misc.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(); +} + + |