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Diffstat (limited to 'src/png/writer.hpp')
| -rw-r--r-- | src/png/writer.hpp | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/src/png/writer.hpp b/src/png/writer.hpp deleted file mode 100644 index 448dfd50b..000000000 --- a/src/png/writer.hpp +++ /dev/null @@ -1,199 +0,0 @@ -/* - * Copyright (C) 2007,2008 Alex Shulgin - * - * This file is part of png++ the C++ wrapper for libpng. PNG++ is free - * software; the exact copying conditions are as follows: - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * - * 2. 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. - * - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. - */ -#ifndef PNGPP_WRITER_HPP_INCLUDED -#define PNGPP_WRITER_HPP_INCLUDED - -#include <cassert> -#include "io_base.hpp" - -namespace png -{ - - /** - * \brief PNG writer class template. This is the low-level - * writing interface--use image class or generator class to - * actually write images. - * - * The \c ostream template parameter specifies the type of output - * stream to work with. The \c ostream class should implement the - * minimum of the following interface: - * - * \code - * class my_ostream - * { - * public: - * void write(char const*, size_t); - * void flush(); - * bool good(); - * }; - * \endcode - * - * With the semantics similar to the \c std::ostream. Naturally, - * \c std::ostream fits this requirement and can be used with the - * writer class as is. - * - * \see image, reader, generator, io_base - */ - template< class ostream > - class writer - : public io_base - { - public: - /** - * \brief Constructs a writer prepared to write PNG image into - * a \a stream. - */ - explicit writer(ostream& stream) - : io_base(png_create_write_struct(PNG_LIBPNG_VER_STRING, - static_cast< io_base* >(this), - raise_error, - 0)) - { - png_set_write_fn(m_png, & stream, write_data, flush_data); - } - - ~writer() - { - m_end_info.destroy(); - png_destroy_write_struct(& m_png, m_info.get_png_info_ptr()); - } - - void write_png() const - { - if (setjmp(png_jmpbuf(m_png))) - { - throw error(m_error); - } - png_write_png(m_png, - m_info.get_png_info(), - /* transforms = */ 0, - /* params = */ 0); - } - - /** - * \brief Write info about PNG image. - */ - void write_info() const - { - if (setjmp(png_jmpbuf(m_png))) - { - throw error(m_error); - } - m_info.write(); - } - - /** - * \brief Writes a row of image data at a time. - */ - void write_row(byte* bytes) - { - if (setjmp(png_jmpbuf(m_png))) - { - throw error(m_error); - } - png_write_row(m_png, bytes); - } - - /** - * \brief Reads ending info about PNG image. - */ - void write_end_info() const - { - if (setjmp(png_jmpbuf(m_png))) - { - throw error(m_error); - } - m_end_info.write(); - } - - private: - static void write_data(png_struct* png, byte* data, png_size_t length) - { - io_base* io = static_cast< io_base* >(png_get_error_ptr(png)); - writer* wr = static_cast< writer* >(io); - wr->reset_error(); - ostream* stream = reinterpret_cast< ostream* >(png_get_io_ptr(png)); - try - { - stream->write(reinterpret_cast< char* >(data), length); - if (!stream->good()) - { - wr->set_error("ostream::write() failed"); - } - } - catch (std::exception const& error) - { - wr->set_error(error.what()); - } - catch (...) - { - assert(!"caught something wrong"); - wr->set_error("write_data: caught something wrong"); - } - if (wr->is_error()) - { - wr->raise_error(); - } - } - - static void flush_data(png_struct* png) - { - io_base* io = static_cast< io_base* >(png_get_error_ptr(png)); - writer* wr = static_cast< writer* >(io); - wr->reset_error(); - ostream* stream = reinterpret_cast< ostream* >(png_get_io_ptr(png)); - try - { - stream->flush(); - if (!stream->good()) - { - wr->set_error("ostream::flush() failed"); - } - } - catch (std::exception const& error) - { - wr->set_error(error.what()); - } - catch (...) - { - assert(!"caught something wrong"); - wr->set_error("flush_data: caught something wrong"); - } - if (wr->is_error()) - { - wr->raise_error(); - } - } - }; - -} // namespace png - -#endif // PNGPP_WRITER_HPP_INCLUDED |