85 lines
2.6 KiB
C++
85 lines
2.6 KiB
C++
/*
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* This file is part of libgim.
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*
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* libgim is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libgim. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2011-2014 Danny Robson <danny@nerdcruft.net>
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*/
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#include "image.hpp"
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#include "debug.hpp"
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#include "except.hpp"
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#include <fstream>
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//-----------------------------------------------------------------------------
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static void
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write_netpbm (const uint8_t *restrict pixels,
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size_t width,
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size_t height,
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size_t stride,
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const boost::filesystem::path &path,
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const char* MAGIC) {
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CHECK_HARD (pixels);
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CHECK_HARD (width > 0);
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CHECK_HARD (stride >= width);
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CHECK_HARD (height > 0);
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// Establish an output stream
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std::ofstream output (path.string ());
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if (!output.good ())
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throw util::output_error ("Unable to open output file");
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// Write the PPM header.
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output << MAGIC << "\n"
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<< width << "\n"
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<< height << "\n"
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<< (size_t)std::numeric_limits<uint8_t>::max () << "\n";
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// Write the data rows
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for (size_t y = 0; y < height; ++y) {
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for (size_t x = 0; x < width; ++x)
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output << pixels[y * stride + x];
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}
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}
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//-----------------------------------------------------------------------------
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void
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util::pgm::write (const uint8_t *restrict pixels,
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size_t width,
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size_t height,
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size_t stride,
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const boost::filesystem::path &path) {
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// TODO: We should switch between P2 (ascii) and P5 (binary)
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static const char MAGIC[] = "P5";
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write_netpbm (pixels, width, height, stride, path, MAGIC);
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}
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//-----------------------------------------------------------------------------
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void
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util::ppm::write (const uint8_t *restrict pixels,
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size_t width,
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size_t height,
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size_t stride,
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const boost::filesystem::path &path) {
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// TODO: We should switch between P3 (ascii) and P6 (binary)
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static const char MAGIC[] = "P6";
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write_netpbm (pixels, width, height, stride, path, MAGIC);
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}
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