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4
src/png++-0.2.5/AUTHORS
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png++ is written by Alexander Shulgin (alex dot shulgin at gmail dot com)
Copyright (C) 2007,2008
When writing to me be sure to put png++: in the subject :-)

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src/png++-0.2.5/BUGS
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This file lists known bugs and limitations in png++:
- Lacks support for output transformations
- Lacks support for optional/unknown chunks in PNG data stream
- Documentation sucks
To report bugs, please use Savannah bug tracker:
http://savannah.nongnu.org/bugs/?group=pngpp&func=additem
Do not forget to check if the bug was already filed. :-)

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src/png++-0.2.5/COPYING
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Copying png++ is subject to the following license:
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.

29
src/png++-0.2.5/ChangeLog
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2009-06-21 Alex Shulgin
* config.hpp: Added support for FreeBSD (detect endianness).
Patch by <c.petrik.sosa@gmail.com>.
png++-0.2.3 19 Oct 2008
Fixed numerous `already defined' errors due to require_color_space
implementation. Added `config.hpp'. Fixed `strerror' usage.
Minor docs fixes.
png++-0.2.1 08 Dec 2007
Added support for tRNS chunk. Added non-std IO streams support.
Fixed 16-bit endianness problems. Improved test script.
png++-0.2.0 08 Jul 2007
Major internal code refactoring. Added support for non-8-bit
data, row-by-row IO, added docs, test suite and more. Fixed some
bugs including interlace handling.
png++-0.1.1 07 Apr 2007
Added appropriate copyright notices.
png++-0.1.0 04 Feb 2007
Initial release.

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src/png++-0.2.5/Doxyfile
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src/png++-0.2.5/INSTALL
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General
=======
PNG++ comes as a set of header files and does not require compilation
to be installed. For the same reason there are no binary packages for
png++.
Prerequisites
=============
- png++ is known to work with libpng-1.2.x (probably, the 1.4.x
flavour will work too)
- png++ compiles with g++-4.1. Other version should work well too,
but I have not tested.
- png++ relies on GNU make for compiling tests and examples; in
particular it uses "remaking makefiles" feature.
- Documentation is produced using doxygen (http://www.doxygen.org/).
Installation
============
Follow these instructions in order to install png++:
- Unpack source package:
$ tar -zxf png++-0.2.x.tar.gz -C ~/src
- Go to your brand new png++ sources directory:
$ cd ~/src/png++-0.2.x
- Issue make to test how it's doing:
$ make
This will compile examples in the example/ directory.
As always, CFLAGS and LDFLAGS could be used to adjust compilation. In
addition, you might want to specify custom libpng-config. Use
LIBPNG_CONFIG variable for that purpose, like this:
$ make LIBPNG_CONFIG=~/bin/libpng-config
If everything goes well, try:
$ make test
(or "make check" which is the same as above). This will run the test
suite. If tests do not produce error messages then probably all is
OK.
- Now you can create documentation (optional). Use
$ make docs
to run doxygen in the sources directory.
- Now it is time to become root and install png++ into your system:
# make install
It's OK to issue "make install" under ordinary user permissions if you
want to install png++ into your home directory. Run the following
command:
$ make install PREFIX=$HOME
This will copy png++ header files to ~/include/png++ and documentation
files to ~/share/doc/png++-0.2.x (if the docs were built).
Without a PREFIX png++ installs to /usr/local
Happy hacking!
--
Alex Shulgin <alex.shulgin@gmail.com>

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src/png++-0.2.5/Makefile
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#
# 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.
#
# don't forget to update version before releasing!
version := 0.2.5
ifndef PREFIX
PREFIX := /usr/local
endif
ifdef MINGW
bin_suffix := .exe
endif
make_cflags := -Wall $(CFLAGS) -I$(PREFIX)/include
make_ldflags := $(LDFLAGS) -L$(PREFIX)/lib
ifndef NDEBUG
make_cflags := $(make_cflags) -g
make_ldflags := $(make_ldflags) -g
endif
ifndef LIBPNG_CONFIG
LIBPNG_CONFIG := libpng-config
endif
build_files := Makefile Doxyfile
doc_files := AUTHORS BUGS ChangeLog COPYING INSTALL NEWS README TODO
headers := *.hpp
sources :=
dist_dir := png++-$(version)
dist_package := png++-$(version).tar.gz
dist_files := $(build_files) $(doc_files) \
$(headers) $(sources)
dist_subdirs := example test
all: examples
install: install-headers install-docs
uninstall: uninstall-headers uninstall-docs
install-headers:
mkdir -p $(PREFIX)/include/png++
cp *.hpp $(PREFIX)/include/png++
uninstall-headers:
rm -rf $(PREFIX)/include/png++
dist: dist-mkdir dist-copy-files dist-package
dist-mkdir:
rm -rf $(dist_dir)
mkdir $(dist_dir)
dist-copy-files:
cp $(dist_files) $(dist_dir)
for i in $(dist_subdirs); do \
$(MAKE) dist-copy-files -C $$i $(MAKEFLAGS) \
dist_dir=`pwd`/$(dist_dir); \
done
dist-package:
rm -f $(dist_package)
tar -zcf $(dist_package) $(dist_dir) --exclude=.svn --exclude='*~'
rm -rf $(dist_dir)
clean: test-clean examples-clean
# rm -f $(targets)
thorough-clean: clean docs-clean
check: test
test:
$(MAKE) test -C test $(MAKEFLAGS) PNGPP=`pwd`
test-clean:
$(MAKE) clean -C test $(MAKEFLAGS)
test-compile-headers: *.hpp
for i in *.hpp; do \
echo '#include "'$$i'"' >$$i.cpp \
&& g++ -c $$i.cpp $(make_cflags) `$(LIBPNG_CONFIG) --cflags`; \
done
rm -f *.hpp.o *.hpp.cpp
docs:
doxygen
docs-clean:
rm -rf doc
install-docs:
if [ -d doc ]; then \
dir=$(PREFIX)/share/doc/$(dist_dir); \
rm -rf $$dir; \
mkdir -p $$dir \
&& cp -r $(doc_files) doc/html $$dir; \
cd $(PREFIX)/share/doc; \
[ -L png++ ] && rm png++; \
[ -d png++ ] || ln -s $(dist_dir) png++; \
fi
uninstall-docs:
rm -rf $(PREFIX)/share/doc/$(dist_dir) $(PREFIX)/share/doc/png++
examples:
$(MAKE) -C example $(MAKEFLAGS)
examples-clean:
$(MAKE) clean -C example $(MAKEFLAGS)
.PHONY: all install \
dist dist-mkdir dist-copy-files dist-package \
clean thorough-clean \
check test test-clean test-compile-headers \
docs docs-clean \
examples examples-clean

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src/png++-0.2.5/NEWS
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Version 0.2.5:
- Fixed compatibility with newer libpng versions (>= 1.4)
- Fixed compilation on FreeBSD.
- Fixed tRNS handling with transformations.
- Added IO transformation debugging facility.
- Better organized test suite.
Version 0.2.3:
- Fixed numerous `already defined' errors due to require_color_space
implementation.
- Added `config.hpp'.
- Fixed `strerror' usage.
- Minor docs fixes.
Version 0.2.1:
- Added support for tRNS chunk.
- Added non-std IO streams support.
- Fixed 16-bit endianness problems.
- Improved test script.
Version 0.2.0:
- Added support for 16-bit data (RGB, RGBA, Grayscale and Gray+Alpha
color types)
- Added support for packed 1-, 2- or 4-bit pixels (Grayscale and
Indexed colors)
- Fixed interlace handling code which was severely broken
- Added possibility to process images without reading the entire
image into memory
- Internals are refactored while the client interface is mostly
unchanged
- Added intensive test suite
- Added documentation

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src/png++-0.2.5/TODO
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? add output transformations
+ support for non-8bit data
+ stream exceptions: badbit only
+ adjust png::image for non-memory back end buffer + row-by-row io
+ use doxygen
- add optional and unknown chunks handling
+ change bit_depth to size_t
+ move tests sources to test/, examples to examples/
+ extract common code from generator/consumer
+ update pixel traits to detect channels count
+ unify template parameters naming
+ make sure all headers compile on their own
+ add compilation dependency detection
+ add pixel_buffer/image::operator[]
+ improve docs and README
? endianness in expand_8_to_16()
- unify error messages (capitalization, etc.)
+ move stream template parameter from class to function level in
generator and consumer
+ make all tests run even if any of them fails

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src/png++-0.2.5/color.hpp
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/*
* 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_COLOR_HPP_INCLUDED
#define PNGPP_COLOR_HPP_INCLUDED
#include "types.hpp"
namespace png
{
/**
* \brief PNG color struct extension. Adds constructors.
*/
struct color
: png_color
{
explicit color(byte r = 0, byte g = 0, byte b = 0)
{
this->red = r;
this->green = g;
this->blue = b;
}
/**
* \brief Initializes color with a copy of png_color object.
*/
color(png_color const& other)
{
this->red = other.red;
this->green = other.green;
this->blue = other.blue;
}
};
} // namespace png
#endif // PNGPP_COLOR_HPP_INCLUDED

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src/png++-0.2.5/config.hpp
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/*
* Copyright (C) 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_CONFIG_HPP_INCLUDED
#define PNGPP_CONFIG_HPP_INCLUDED
// Endianness test
#if defined(__GLIBC__)
#include <endian.h>
#elif defined(__WIN32)
#define __LITTLE_ENDIAN 1234
#define __BIG_ENDIAN 4321
#define __BYTE_ORDER __LITTLE_ENDIAN
#elif defined(__APPLE__)
#include <machine/endian.h>
#include <sys/_endian.h>
#elif defined(__FreeBSD__)
#include <machine/endian.h>
#include <sys/endian.h>
#else
#error Byte-order could not be detected.
#endif
#endif // PNGPP_CONFIG_HPP_INCLUDED

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src/png++-0.2.5/consumer.hpp
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/*
* 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_CONSUMER_HPP_INCLUDED
#define PNGPP_CONSUMER_HPP_INCLUDED
#include <cassert>
#include <stdexcept>
#include <iostream>
#include <istream>
#include "config.hpp"
#include "error.hpp"
#include "streaming_base.hpp"
#include "reader.hpp"
#include "pixel_buffer.hpp"
namespace png
{
/**
* \brief Pixel consumer class template.
*
* Used as a base class for custom pixel consumer classes as well
* as inside image class implementation to read pixels into the
* pixel buffer.
*
* Encapsulates PNG %image reading procedure. In order to create
* a custom pixel %consumer use CRTP trick:
*
* \code
* class pixel_consumer
* : public png::consumer< pixel, pixel_consumer >
* {
* ...
* };
* \endcode
*
* Your pixel %consumer class should implement \c get_next_row()
* method and \c reset() method (optional). Their signatures are
* as follows:
*
* \code
* png::byte* get_next_row(size_t pos);
* void reset(size_t pass);
* \endcode
*
* The \c get_next_row() method is called every time a new row of
* %image data is available to the reader. The position of the row
* being read is passed as \c pos parameter. The \c pos takes
* values from \c 0 to \c <image_height>-1 inclusively. The
* method should return the starting address of a row buffer
* capable of storing appropriate amount of pixels (i.e. the width
* of the %image being read). The address should be casted to
* png::byte* pointer type using \c reinterpret_cast<> or a
* C-style cast.
*
* The optional \c reset() method is called every time the new
* pass of interlaced %image processing starts. The number of
* interlace pass is avaiable as the only parameter of the method.
* For non-interlaced images the method is called once prior to
* any calls to \c get_next_row(). The value of \c 0 is passed
* for the \c pass number.
*
* An optional template parameter \c info_holder encapsulates
* image_info storage policy. Using def_image_info_holder results
* in image_info object stored as a sub-object of the consumer
* class. You may specify image_info_ref_holder in order to use a
* reference to the externally stored image_info object. This way
* you will have to construct the consumer object passing the
* reference to image_info object.
*
* Also, you might want implement an %info holder object yourself
* to fine-tune your code. In any case, you can access the
* image_info object from your %consumer class methods using the
* following code:
*
* \code
* png::image_info& info = m_info_holder.get_info();
* \endcode
*
* An optional \c bool template parameter \c interlacing_supported
* specifies whether reading interlacing images is supported by
* your %consumer class. It defaults to \c false. An attempt to
* read an interlaced %image will result in discarding pixels
* obtained at all the interlacing passes except the last one.
*
* In order to fully support interlacing specify \c true for \c
* interlacing_supported parameter and implement \c reset()
* method.
*
* \see image, generator
*/
template< typename pixel,
class pixcon,
class info_holder = def_image_info_holder,
bool interlacing_supported = false >
class consumer
: public streaming_base< pixel, info_holder >
{
public:
typedef pixel_traits< pixel > traits;
/**
* \brief The default io transformation: does nothing.
*/
struct transform_identity
{
void operator()(io_base&) const {}
};
/**
* \brief Reads an image from the stream using default io
* transformation.
*/
template< typename istream >
void read(istream& stream)
{
read(stream, transform_identity());
}
/**
* \brief Reads an image from the stream using custom io
* transformation.
*
* Essentially, this method constructs a reader object and
* instructs it to read the image from the stream. It handles
* IO transformation, as well as interlaced image reading.
*/
template< typename istream, class transformation >
void read(istream& stream, transformation const& transform)
{
reader< istream > rd(stream);
rd.read_info();
transform(rd);
#if __BYTE_ORDER == __LITTLE_ENDIAN
if (pixel_traits< pixel >::get_bit_depth() == 16)
{
#ifdef PNG_READ_SWAP_SUPPORTED
rd.set_swap();
#else
throw error("Cannot read 16-bit image:"
" recompile with PNG_READ_SWAP_SUPPORTED.");
#endif
}
#endif
// interlace handling _must_ be set up prior to info update
size_t pass_count;
if (rd.get_interlace_type() != interlace_none)
{
#ifdef PNG_READ_INTERLACING_SUPPORTED
pass_count = rd.set_interlace_handling();
#else
throw error("Cannot read interlaced image:"
" interlace handling disabled.");
#endif
}
else
{
pass_count = 1;
}
rd.update_info();
if (rd.get_color_type() != traits::get_color_type()
|| rd.get_bit_depth() != traits::get_bit_depth())
{
throw std::logic_error("color type and/or bit depth mismatch"
" in png::consumer::read()");
}
this->get_info() = rd.get_image_info();
pixcon* pixel_con = static_cast< pixcon* >(this);
if (pass_count > 1 && !interlacing_supported)
{
skip_interlaced_rows(rd, pass_count);
pass_count = 1;
}
read_rows(rd, pass_count, pixel_con);
rd.read_end_info();
}
protected:
typedef streaming_base< pixel, info_holder > base;
/**
* \brief Constructs a consumer object using passed image_info
* object to store image information.
*/
explicit consumer(image_info& info)
: base(info)
{
}
private:
template< typename istream >
void skip_interlaced_rows(reader< istream >& rd, size_t pass_count)
{
typedef std::vector< pixel > row;
typedef row_traits< row > row_traits_type;
row dummy_row(this->get_info().get_width());
for (size_t pass = 1; pass < pass_count; ++pass)
{
rd.read_row(reinterpret_cast< byte* >
(row_traits_type::get_data(dummy_row)));
}
}
template< typename istream >
void read_rows(reader< istream >& rd, size_t pass_count,
pixcon* pixel_con)
{
for (size_t pass = 0; pass < pass_count; ++pass)
{
pixel_con->reset(pass);
for (size_t pos = 0; pos < this->get_info().get_height(); ++pos)
{
rd.read_row(pixel_con->get_next_row(pos));
}
}
}
};
} // namespace png
#endif // PNGPP_CONSUMER_HPP_INCLUDED

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src/png++-0.2.5/convert_color_space.hpp
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/*
* 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_CONVERT_COLOR_SPACE_HPP_INCLUDED
#define PNGPP_CONVERT_COLOR_SPACE_HPP_INCLUDED
#include "error.hpp"
#include "rgb_pixel.hpp"
#include "rgba_pixel.hpp"
#include "gray_pixel.hpp"
#include "ga_pixel.hpp"
#include "index_pixel.hpp"
#include "reader.hpp"
#include "writer.hpp"
namespace png
{
namespace detail
{
/**
* \brief IO transformation class template. Converts %image %color
* space.
*/
template< typename pixel >
struct convert_color_space_impl
{
typedef pixel_traits< pixel > traits;
typedef typename traits::component_type component_type;
typedef basic_alpha_pixel_traits< component_type > alpha_traits;
template< class reader >
void operator()(reader& io) const
{
handle_16(io);
handle_alpha(io, alpha_traits::get_alpha_filler());
handle_palette(io);
handle_rgb(io);
handle_gray(io);
io.set_color_type(traits::get_color_type());
io.set_bit_depth(traits::get_bit_depth());
}
protected:
static void expand_8_to_16(png_struct*, png_row_info* row_info,
byte* row)
{
#ifdef DEBUG_EXPAND_8_16
printf("row: width=%d, bytes=%d, channels=%d\n",
row_info->width, row_info->rowbytes, row_info->channels);
printf("<= ");
dump_row(row, row_info->rowbytes);
#endif
for (size_t i = row_info->rowbytes; i-- > 0; )
{
row[2*i + 1] = row[i];
row[2*i + 0] = 0;
}
#ifdef DEBUG_EXPAND_8_16
printf("=> ");
dump_row(row, 2*row_info->rowbytes);
#endif
}
#ifdef DEBUG_EXPAND_8_16
static void dump_row(byte const* row, size_t width)
{
printf("{");
for (size_t i = 0; i < width; ++i)
{
printf(" %02x,", row[i]);
}
printf(" }\n");
}
#endif
template< class reader >
static void handle_16(reader& io)
{
if (io.get_bit_depth() == 16 && traits::get_bit_depth() == 8)
{
#ifdef PNG_READ_16_TO_8_SUPPORTED
io.set_strip_16();
#else
throw error("expected 8-bit data but found 16-bit;"
" recompile with PNG_READ_16_TO_8_SUPPORTED");
#endif
}
if (io.get_bit_depth() != 16 && traits::get_bit_depth() == 16)
{
#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
io.set_read_user_transform(expand_8_to_16);
io.set_user_transform_info(NULL, 16,
traits::get_channels());
#else
throw error("expected 16-bit data but found 8-bit;"
" recompile with"
" PNG_READ_USER_TRANSFORM_SUPPORTED");
#endif
}
}
template< class reader >
static void handle_alpha(reader& io, uint_32 filler)
{
bool src_alpha = (io.get_color_type() & color_mask_alpha);
bool src_tRNS = io.has_chunk(chunk_tRNS);
bool dst_alpha = traits::get_color_type() & color_mask_alpha;
if ((src_alpha || src_tRNS) && !dst_alpha)
{
#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
io.set_strip_alpha();
#else
throw error("alpha channel unexpected;"
" recompile with"
" PNG_READ_STRIP_ALPHA_SUPPORTED");
#endif
}
if (!src_alpha && dst_alpha)
{
#if defined(PNG_tRNS_SUPPORTED) && defined(PNG_READ_EXPAND_SUPPORTED)
if (src_tRNS)
{
io.set_tRNS_to_alpha();
return;
}
#endif
#if defined(PNG_READ_FILLER_SUPPORTED) && !defined(PNG_1_0_X)
io.set_add_alpha(filler, filler_after);
#else
throw error("expected alpha channel but none found;"
" recompile with PNG_READ_FILLER_SUPPORTED"
" and be sure to use libpng > 1.0.x");
#endif
}
}
template< class reader >
static void handle_palette(reader& io)
{
if (io.get_color_type() == color_type_palette)
{
#ifdef PNG_READ_EXPAND_SUPPORTED
io.set_palette_to_rgb();
if (traits::get_color_type() != color_type_palette)
{
io.get_info().drop_palette();
}
#else
throw error("indexed colors unexpected;"
" recompile with PNG_READ_EXPAND_SUPPORTED");
#endif
}
}
template< class reader >
static void handle_rgb(reader& io)
{
bool src_rgb =
io.get_color_type() & (color_mask_rgb | color_mask_palette);
bool dst_rgb = traits::get_color_type() & color_mask_rgb;
if (src_rgb && !dst_rgb)
{
#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
io.set_rgb_to_gray(/*rgb_to_gray_error*/);
#else
throw error("grayscale data expected;"
" recompile with"
" PNG_READ_RGB_TO_GRAY_SUPPORTED");
#endif
}
if (!src_rgb && dst_rgb)
{
#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
io.set_gray_to_rgb();
#else
throw error("expected RGB data;"
" recompile with"
" PNG_READ_GRAY_TO_RGB_SUPPORTED");
#endif
}
}
template< class reader >
static void handle_gray(reader& io)
{
if ((io.get_color_type() & ~color_mask_alpha)
== color_type_gray)
{
if (io.get_bit_depth() < 8 && traits::get_bit_depth() >= 8)
{
#ifdef PNG_READ_EXPAND_SUPPORTED
io.set_gray_1_2_4_to_8();
#else
throw error("convert_color_space: expected 8-bit data;"
" recompile with"
" PNG_READ_EXPAND_SUPPORTED");
#endif
}
}
}
};
} // namespace detal
/**
* \brief IO transformation class template. Converts %image %color
* space.
*
* This IO transformation class template is used to convert %color
* space of the source %image to the %color space of the target
* %image. An error with human-readable description is thrown
* when the %color space could not be converted. Often, this
* means that you have to recompile libpng with some more
* conversion options turned on.
*
* Not implemented--see specializations.
*
* \see image, image::read
*/
template< typename pixel >
struct convert_color_space
{
};
/**
* \brief Converts %image %color space. A specialization for
* rgb_pixel type.
*/
template<>
struct convert_color_space< rgb_pixel >
: detail::convert_color_space_impl< rgb_pixel >
{
};
/**
* \brief Converts %image %color space. A specialization for
* rgb_pixel_16 type.
*/
template<>
struct convert_color_space< rgb_pixel_16 >
: detail::convert_color_space_impl< rgb_pixel_16 >
{
};
/**
* \brief Converts %image %color space. A specialization for
* rgba_pixel type.
*/
template<>
struct convert_color_space< rgba_pixel >
: detail::convert_color_space_impl< rgba_pixel >
{
};
/**
* \brief Converts %image %color space. A specialization for
* rgba_pixel_16 type.
*/
template<>
struct convert_color_space< rgba_pixel_16 >
: detail::convert_color_space_impl< rgba_pixel_16 >
{
};
/**
* \brief Converts %image %color space. A specialization for
* gray_pixel type.
*/
template<>
struct convert_color_space< gray_pixel >
: detail::convert_color_space_impl< gray_pixel >
{
};
/**
* \brief Converts %image %color space. A specialization for
* gray_pixel_16 type.
*/
template<>
struct convert_color_space< gray_pixel_16 >
: detail::convert_color_space_impl< gray_pixel_16 >
{
};
/**
* \brief Converts %image %color space. A specialization for
* ga_pixel type.
*/
template<>
struct convert_color_space< ga_pixel >
: detail::convert_color_space_impl< ga_pixel >
{
};
/**
* \brief Converts %image %color space. A specialization for
* ga_pixel_16 type.
*/
template<>
struct convert_color_space< ga_pixel_16 >
: detail::convert_color_space_impl< ga_pixel_16 >
{
};
} // namespace png
#endif // PNGPP_CONVERT_COLOR_SPACE_HPP_INCLUDED

436
src/png++-0.2.5/dbf_api.html
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@ -1,436 +0,0 @@
<html>
<head>
<title>Attribute (.DBF) API</title>
</head>
<body>
<h1>Attribute (.DBF) API</h1>
The Attribute (DBF) API uses DBFHandle to represent a handle for access
to one .dbf file. The contents of the DBFHandle are visible (see shapefil.h)
but should be ignored by the application. It is intended that all information
be accessed by API functions. Note that there should be exactly one record
in the .dbf file for each shape in the .shp/.shx files. This constraint
must be maintained by the application.<p>
<!-------------------------------------------------------------------------->
<h2>DBFOpen()</h2>
<pre>
DBFHandle DBFOpen( const char * pszDBFFile, const char * pszAccess );
pszDBFFile: The name of the xBase (.dbf) file to access.
pszAccess: The fopen() style access string. At this time only
"rb" (read-only binary) and "rb+" (read/write binary)
should be used.
</pre>
The DBFOpen() function should be used to establish access to an existing
xBase format table file. The returned DBFHandle is passed to other
access functions, and DBFClose() should be invoked to recover resources, and
flush changes to disk when complete. The DBFCreate() function should
called to create new xBase files. As a convenience, DBFOpen() can be
called with the name of a .shp or .shx file, and it will figure out the
name of the related .dbf file.<p>
<!-------------------------------------------------------------------------->
<h2>DBFCreate()</h2>
<pre>
DBFHandle DBFCreate( const char * pszDBFFile );
pszDBFFile: The name of the xBase (.dbf) file to create.
</pre>
The DBFCreate() function creates a new xBase format file with the given
name, and returns an access handle that can be used with other DBF functions.
The newly created file will have no fields, and no records. Fields should
be added with DBFAddField() before any records add written.
<!-------------------------------------------------------------------------->
<h2>DBFGetFieldCount()</h2>
<pre>
int DBFGetFieldCount( DBFHandle hDBF );
hDBF: The access handle for the file to be queried, as returned
by DBFOpen(), or DBFCreate().
</pre>
The DBFGetFieldCount() function returns the number of fields currently
defined for the indicated xBase file.
<!-------------------------------------------------------------------------->
<h2>DBFGetRecordCount()</h2>
<pre>
int DBFGetRecordCount( DBFHandle hDBF );
hDBF: The access handle for the file to be queried, as returned by
DBFOpen(), or DBFCreate().
</pre>
The DBFGetRecordCount() function returns the number of records that
exist on the xBase file currently. Note that with shape files one xBase
record exists for each shape in the .shp/.shx files.<p>
<!-------------------------------------------------------------------------->
<h2>DBFGetFieldIndex()</h2>
<pre>
int DBFGetFieldIndex( DBFHandle hDBF, const char *pszFieldName );
hDBF: The access handle for the file to be queried, as returned by
DBFOpen(), or DBFCreate().
pszFieldName: Name of the field to search for.
</pre>
Returns the index of the field matching this name, or -1 on failure. The
comparison is case insensitive. However, lengths must match exactly.<p>
<!-------------------------------------------------------------------------->
<h2>DBFGetFieldInfo()</h2>
<pre>
DBFFieldType DBFGetFieldInfo( DBFHandle hDBF, int iField, char * pszFieldName,
int * pnWidth, int * pnDecimals );
hDBF: The access handle for the file to be queried, as returned by
DBFOpen(), or DBFCreate().
iField: The field to be queried. This should be a number between
0 and n-1, where n is the number fields on the file, as
returned by DBFGetFieldCount().
pszFieldName: If this pointer is not NULL the name of the requested field
will be written to this location. The pszFieldName buffer
should be at least 12 character is size in order to hold
the longest possible field name of 11 characters plus a
terminating zero character.
pnWidth: If this pointer is not NULL, the width of the requested field
will be returned in the int pointed to by pnWidth. This is
the width in characters.
pnDecimals: If this pointer is not NULL, the number of decimal places
precision defined for the field will be returned. This is
zero for integer fields, or non-numeric fields.
</pre>
The DBFGetFieldInfo() returns the type of the requested field, which is
one of the DBFFieldType enumerated values. As well, the field name, and
field width information can optionally be returned. The field type returned
does not correspond one to one with the xBase field types. For instance
the xBase field type for Date will just be returned as being FTInteger. <p>
<pre>
typedef enum {
FTString, /* fixed length string field */
FTInteger, /* numeric field with no decimals */
FTDouble, /* numeric field with decimals */
FTLogical, /* logical field. */
FTInvalid /* not a recognised field type */
} DBFFieldType;
</pre>
<!-------------------------------------------------------------------------->
<h2>DBFAddField()</h2>
<pre>
int DBFAddField( DBFHandle hDBF, const char * pszFieldName,
DBFFieldType eType, int nWidth, int nDecimals );
hDBF: The access handle for the file to be updated, as returned by
DBFOpen(), or DBFCreate().
pszFieldName: The name of the new field. At most 11 character will be used.
In order to use the xBase file in some packages it may be
necessary to avoid some special characters in the field names
such as spaces, or arithmetic operators.
eType: One of FTString, FTInteger or FTDouble in order to establish
the type of the new field. Note that some valid xBase field
types cannot be created such as date fields.
nWidth: The width of the field to be created. For FTString fields this
establishes the maximum length of string that can be stored.
For FTInteger this establishes the number of digits of the
largest number that can
be represented. For FTDouble fields this in combination
with the nDecimals value establish the size, and precision
of the created field.
nDecimals: The number of decimal places to reserve for FTDouble fields.
For all other field types this should be zero. For instance
with nWidth=7, and nDecimals=3 numbers would be formatted
similarly to `123.456'.
</pre>
The DBFAddField() function is used to add new fields to an existing xBase
file opened with DBFOpen(), or created with DBFCreate(). Note that fields
can only be added to xBase files with no records, though this is limitation
of this API, not of the file format.<p>
The DBFAddField() return value is the field number of the new field, or
-1 if the addition of the field failed.<p>
<!-------------------------------------------------------------------------->
<h2>DBFReadIntegerAttribute()</h2>
<pre>
int DBFReadIntegerAttribute( DBFHandle hDBF, int iShape, int iField );
hDBF: The access handle for the file to be queried, as returned by
DBFOpen(), or DBFCreate().
iShape: The record number (shape number) from which the field value
should be read.
iField: The field within the selected record that should be read.
</pre>
The DBFReadIntegerAttribute() will read the value of one field and return
it as an integer. This can be used even with FTString fields, though the
returned value will be zero if not interpretable as a number.<p>
<!-------------------------------------------------------------------------->
<h2>DBFReadDoubleAttribute()</h2>
<pre>
double DBFReadDoubleAttribute( DBFHandle hDBF, int iShape, int iField );
hDBF: The access handle for the file to be queried, as returned by
DBFOpen(), or DBFCreate().
iShape: The record number (shape number) from which the field value
should be read.
iField: The field within the selected record that should be read.
</pre>
The DBFReadDoubleAttribute() will read the value of one field and return
it as a double. This can be used even with FTString fields, though the
returned value will be zero if not interpretable as a number.<p>
<!-------------------------------------------------------------------------->
<h2>DBFReadStringAttribute()</h2>
<pre>
const char *DBFReadStringAttribute( DBFHandle hDBF, int iShape, int iField );
hDBF: The access handle for the file to be queried, as returned by
DBFOpen(), or DBFCreate().
iShape: The record number (shape number) from which the field value
should be read.
iField: The field within the selected record that should be read.
</pre>
The DBFReadStringAttribute() will read the value of one field and return
it as a string. This function may be used on any field type (including
FTInteger and FTDouble) and will return the string representation stored
in the .dbf file. The returned pointer is to an internal buffer
which is only valid untill the next DBF function call. It's contents may
be copied with normal string functions such as strcpy(), or strdup(). If
the TRIM_DBF_WHITESPACE macro is defined in shapefil.h (it is by default)
then all leading and trailing space (ASCII 32) characters will be stripped
before the string is returned.<p>
<!-------------------------------------------------------------------------->
<h2>DBFIsAttributeNULL()</h2>
<pre>
int DBFIsAttributeNULL( DBFHandle hDBF, int iShape, int iField );
hDBF: The access handle for the file to be queried, as returned by
DBFOpen(), or DBFCreate().
iShape: The record number (shape number) from which the field value
should be read.
iField: The field within the selected record that should be read.
</pre>
This function will return TRUE if the indicated field is NULL valued
otherwise FALSE. Note that NULL fields are represented in the .dbf file
as having all spaces in the field. Reading NULL fields will result in
a value of 0.0 or an empty string with the other DBFRead*Attribute()
functions.<p>
<!-------------------------------------------------------------------------->
<h2>DBFWriteIntegerAttribute</h2>
<pre>
int DBFWriteIntegerAttribute( DBFHandle hDBF, int iShape, int iField,
int nFieldValue );
hDBF: The access handle for the file to be written, as returned by
DBFOpen(), or DBFCreate().
iShape: The record number (shape number) to which the field value
should be written.
iField: The field within the selected record that should be written.
nFieldValue: The integer value that should be written.
</pre>
The DBFWriteIntegerAttribute() function is used to write a value to a numeric
field (FTInteger, or FTDouble). If the write succeeds the value TRUE will
be returned, otherwise FALSE will be returned. If the value is too large to
fit in the field, it will be truncated and FALSE returned.<p>
<!-------------------------------------------------------------------------->
<h2>DBFWriteDoubleAttribute()</h2>
<pre>
int DBFWriteDoubleAttribute( DBFHandle hDBF, int iShape, int iField,
double dFieldValue );
hDBF: The access handle for the file to be written, as returned by
DBFOpen(), or DBFCreate().
iShape: The record number (shape number) to which the field value
should be written.
iField: The field within the selected record that should be written.
dFieldValue: The floating point value that should be written.
</pre>
The DBFWriteDoubleAttribute() function is used to write a value to a numeric
field (FTInteger, or FTDouble). If the write succeeds the value TRUE will
be returned, otherwise FALSE will be returned. If the value is too large to
fit in the field, it will be truncated and FALSE returned.<p>
<!-------------------------------------------------------------------------->
<h2>DBFWriteStringAttribute()</h2>
<pre>
int DBFWriteStringAttribute( DBFHandle hDBF, int iShape, int iField,
const char * pszFieldValue );
hDBF: The access handle for the file to be written, as returned by
DBFOpen(), or DBFCreate().
iShape: The record number (shape number) to which the field value
should be written.
iField: The field within the selected record that should be written.
pszFieldValue: The string to be written to the field.
</pre>
The DBFWriteStringAttribute() function is used to write a value to a string
field (FString). If the write succeeds the value TRUE willbe returned,
otherwise FALSE will be returned. If the value is too large to
fit in the field, it will be truncated and FALSE returned.<p>
<!-------------------------------------------------------------------------->
<h2>DBFWriteNULLAttribute()</h2>
<pre>
int DBFWriteNULLAttribute( DBFHandle hDBF, int iShape, int iField );
hDBF: The access handle for the file to be written, as returned by
DBFOpen(), or DBFCreate().
iShape: The record number (shape number) to which the field value
should be written.
iField: The field within the selected record that should be written.
</pre>
The DBFWriteNULLAttribute() function is used to clear the indicated field
to a NULL value. In the .dbf file this is represented by setting the entire
field to spaces. If the write succeeds the value TRUE willbe returned,
otherwise FALSE will be returned.<p>
<!-------------------------------------------------------------------------->
<h2>DBFClose()</h2>
<pre>
void DBFClose( DBFHandle hDBF );
hDBF: The access handle for the file to be closed.
</pre>
The DBFClose() function will close the indicated xBase file (opened with
DBFOpen(), or DBFCreate()), flushing out all information to the file on
disk, and recovering any resources associated with having the file open.
The file handle (hDBF) should not be used again with the DBF API after
calling DBFClose().<p>
<!-------------------------------------------------------------------------->
<h2>DBFIsRecordDeleted()</h2>
<pre>
int DBFIsRecordDeleted( DBFHandle hDBF, int iShape );
hDBF: The access handle for the file to be checked.
iShape: The record index to check.
</pre>
Returns TRUE (non-zero) if the record is marked for deletion, otherwise
it returns FALSE.<p>
<!-------------------------------------------------------------------------->
<h2>DBFMarkRecordDeleted()</h2>
<pre>
int DBFMarkRecordDeleted( DBFHandle hDBF, int iShape, int bIsDeleted );
hDBF: The access handle for the file.
iShape: The record index to update.
bIsDeleted: TRUE to mark record deleted, or FALSE to undelete it.
</pre>
Returns TRUE on success, or FALSE on error.<p>
<!-------------------------------------------------------------------------->
<h2>DBFGetNativeFieldType()</h2>
<pre>
char DBFGetNativeFieldType( DBFHandle hDBF, int iField );
hDBF: The access handle for the file.
iField: The field index to query.
</pre>
This function returns the DBF type code of the indicated field. It will
be one of:<p>
<ul>
<li> 'C' (String)
<li> 'D' (Date)
<li> 'F' (Float)
<li> 'N' (Numeric, with or without decimal)
<li> 'L' (Logical)
<li> 'M' (Memo: 10 digits .DBT block ptr)
<li> ' ' (field out of range)
</ul>
</body>
</html>

74
src/png++-0.2.5/end_info.hpp
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/*
* 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_END_INFO_HPP_INCLUDED
#define PNGPP_END_INFO_HPP_INCLUDED
#include "info_base.hpp"
namespace png
{
/**
* \brief Internal class to hold PNG ending %info.
*
* \see info, info_base
*/
class end_info
: public info_base
{
public:
end_info(io_base& io, png_struct* png)
: info_base(io, png)
{
}
void destroy()
{
assert(m_info);
png_destroy_info_struct(m_png, & m_info);
}
void read()
{
png_read_end(m_png, m_info);
}
void write() const
{
png_write_end(m_png, m_info);
}
// TODO: add methods to read/write text comments etc.
};
} // namespace png
#endif // PNGPP_END_INFO_HPP_INCLUDED

84
src/png++-0.2.5/error.hpp
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@ -1,84 +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_ERROR_HPP_INCLUDED
#define PNGPP_ERROR_HPP_INCLUDED
#include <stdexcept>
#include <cerrno>
#include <cstdlib>
namespace png
{
/**
* \brief Exception class to represent runtime errors related to
* png++ operation.
*/
class error
: public std::runtime_error
{
public:
/**
* \param message error description
*/
explicit error(std::string const& message)
: std::runtime_error(message)
{
}
};
/**
* \brief Exception class to represent standard library errors
* (generally IO).
*
* \see reader, writer
*/
class std_error
: public std::runtime_error
{
public:
/**
* Constructs an std_error object. The \a message string is
* appended with <tt>": "</tt> and the error description as
* returned by \c strerror(\a error).
*
* \param message error description
* \param error error number
*/
explicit std_error(std::string const& message, int error = errno)
: std::runtime_error((message + ": ") + strerror(error))
{
}
};
} // namespace png
#endif // PNGPP_ERROR_HPP_INCLUDED

86
src/png++-0.2.5/ga_pixel.hpp
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@ -1,86 +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_GA_PIXEL_HPP_INCLUDED
#define PNGPP_GA_PIXEL_HPP_INCLUDED
#include <limits>
#include "types.hpp"
#include "pixel_traits.hpp"
namespace png
{
/**
* \brief Basic Gray+Alpha pixel type.
*/
template< typename T >
struct basic_ga_pixel
{
typedef pixel_traits< basic_ga_pixel< T > > traits;
/**
* \brief Constructs basic_ga_pixel object from \a value and
* \a alpha components passed as parameters. Alpha defaults
* to full opacity.
*/
basic_ga_pixel(T value = 0, T alpha = traits::get_alpha_filler())
: value(value), alpha(alpha)
{
}
T value;
T alpha;
};
/**
* \brief The 8-bit Gray+Alpha pixel type.
*/
typedef basic_ga_pixel< byte > ga_pixel;
/**
* \brief The 16-bit Gray+Alpha pixel type.
*/
typedef basic_ga_pixel< uint_16 > ga_pixel_16;
/**
* \brief Pixel traits specialization for basic_ga_pixel.
*/
template< typename T >
struct pixel_traits< basic_ga_pixel< T > >
: basic_pixel_traits< basic_ga_pixel< T >, T, color_type_ga >,
basic_alpha_pixel_traits< T >
{
};
} // namespace png
#endif // PNGPP_GA_PIXEL_HPP_INCLUDED

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/*
* 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_GENERATOR_HPP_INCLUDED
#define PNGPP_GENERATOR_HPP_INCLUDED
#include <cassert>
#include <stdexcept>
#include <iostream>
#include <ostream>
#include "config.hpp"
#include "error.hpp"
#include "streaming_base.hpp"
#include "writer.hpp"
namespace png
{
/**
* \brief Pixel generator class template.
*
* Used as a base class for custom pixel generator classes as well
* as inside image class implementation to write pixels from the
* pixel buffer.
*
* A usage example can be found in \c example/pixel_generator.cpp.
*
* Encapsulates PNG %image writing procedure. In order to create
* a custom pixel %generator use CRTP trick:
*
* \code
* class pixel_generator
* : public png::generator< pixel, pixel_generator >
* {
* ...
* };
* \endcode
*
* Your pixel %generator class should implement \c get_next_row()
* method and \c reset() method (optional). Their signatures are
* as follows:
*
* \code
* png::byte* get_next_row(size_t pos);
* void reset(size_t pass);
* \endcode
*
* The \c get_next_row() method is called every time a new row of
* %image data is needed by the writer. The position of the row
* being written is passed as \c pos parameter. The \c pos takes
* values from \c 0 to \c <image_height>-1 inclusively. The
* method should return the starting address of a row buffer
* storing an appropriate amount of pixels (i.e. the width of the
* %image being written). The address should be casted to
* png::byte* pointer type using \c reinterpret_cast<> or a
* C-style cast.
*
* The optional \c reset() method is called every time the new
* pass of interlaced %image processing starts. The number of
* interlace pass is avaiable as the only parameter of the method.
* For non-interlaced images the method is called once prior to
* any calls to \c get_next_row(). The value of \c 0 is passed
* for the \c pass number. You do not have to implement this
* method unless you are going to support interlaced %image
* generation.
*
* An optional template parameter \c info_holder encapsulated
* image_info storage policy. Please refer to consumer class
* documentation for the detailed description of this parameter.
*
* An optional \c bool template parameter \c interlacing_supported
* specifies whether writing interlacing images is supported by
* your %generator class. It defaults to \c false. An attempt to
* write an interlaced %image will result in throwing
* \c std::logic_error.
*
* In order to fully support interlacing specify \c true for \c
* interlacing_supported parameter and implement \c reset()
* method. You _must_ generate the same pixels for every pass to
* get the correct PNG %image output.
*
* \see image, consumer
*/
template< typename pixel,
class pixgen,
class info_holder = def_image_info_holder,
bool interlacing_supported = false >
class generator
: public streaming_base< pixel, info_holder >
{
public:
/**
* \brief Writes an image to the stream.
*
* Essentially, this method constructs a writer object and
* instructs it to write the image to the stream. It handles
* writing interlaced images as long as your generator class
* supports this.
*/
template< typename ostream >
void write(ostream& stream)
{
writer< ostream > wr(stream);
wr.set_image_info(this->get_info());
wr.write_info();
#if __BYTE_ORDER == __LITTLE_ENDIAN
if (pixel_traits< pixel >::get_bit_depth() == 16)
{
#ifdef PNG_WRITE_SWAP_SUPPORTED
wr.set_swap();
#else
throw error("Cannot write 16-bit image:"
" recompile with PNG_WRITE_SWAP_SUPPORTED.");
#endif
}
#endif
size_t pass_count;
if (this->get_info().get_interlace_type() != interlace_none)
{
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
if (interlacing_supported)
{
pass_count = wr.set_interlace_handling();
}
else
{
throw std::logic_error("Cannot write interlaced image:"
" generator does not support it.");
}
#else
throw error("Cannot write interlaced image:"
" interlace handling disabled.");
#endif
}
else
{
pass_count = 1;
}
pixgen* pixel_gen = static_cast< pixgen* >(this);
for (size_t pass = 0; pass < pass_count; ++pass)
{
pixel_gen->reset(pass);
for (size_t pos = 0; pos < this->get_info().get_height(); ++pos)
{
wr.write_row(pixel_gen->get_next_row(pos));
}
}
wr.write_end_info();
}
protected:
typedef streaming_base< pixel, info_holder > base;
/**
* \brief Constructs a generator object using passed image_info
* object to store image information.
*/
explicit generator(image_info& info)
: base(info)
{
}
/**
* \brief Constructs a generator object prepared to generate
* an image of specified width and height.
*/
generator(size_t width, size_t height)
: base(width, height)
{
}
};
} // namespace png
#endif // PNGPP_GENERATOR_HPP_INCLUDED

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/*
* 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_GRAY_PIXEL_HPP_INCLUDED
#define PNGPP_GRAY_PIXEL_HPP_INCLUDED
#include "types.hpp"
#include "packed_pixel.hpp"
#include "pixel_traits.hpp"
namespace png
{
/**
* \brief The 8-bit Grayscale pixel type.
*/
typedef byte gray_pixel;
/**
* \brief The 16-bit Grayscale pixel type.
*/
typedef uint_16 gray_pixel_16;
/**
* \brief The packed gray pixel class template. The available
* specializations are for 1-, 2- and 4-bit pixels.
*/
template< size_t bits >
class packed_gray_pixel
: public packed_pixel< bits >
{
public:
packed_gray_pixel(byte value = 0)
: packed_pixel< bits >(value)
{
}
};
/**
* \brief The 1-bit Grayscale pixel type.
*/
typedef packed_gray_pixel< 1 > gray_pixel_1;
/**
* \brief The 2-bit Grayscale pixel type.
*/
typedef packed_gray_pixel< 2 > gray_pixel_2;
/**
* \brief The 4-bit Grayscale pixel type.
*/
typedef packed_gray_pixel< 4 > gray_pixel_4;
/**
* \brief Pixel traits specialization for gray_pixel.
*/
template<>
struct pixel_traits< gray_pixel >
: basic_pixel_traits< gray_pixel, byte, color_type_gray >
{
};
/**
* \brief Pixel traits specialization for gray_pixel_16.
*/
template<>
struct pixel_traits< gray_pixel_16 >
: basic_pixel_traits< gray_pixel_16, uint_16, color_type_gray >
{
};
/**
* \brief Pixel traits specialization for packed_gray_pixel.
*/
template< size_t bits >
struct pixel_traits< packed_gray_pixel< bits > >
: basic_pixel_traits< packed_gray_pixel< bits >, byte,
color_type_gray, /* channels = */ 1, bits >
{
};
} // namespace png
#endif // PNGPP_GRAY_PIXEL_HPP_INCLUDED

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/*
* 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_IMAGE_HPP_INCLUDED
#define PNGPP_IMAGE_HPP_INCLUDED
#include <fstream>
#include "pixel_buffer.hpp"
#include "generator.hpp"
#include "consumer.hpp"
#include "convert_color_space.hpp"
namespace png
{
/**
* \brief Class template to represent PNG image.
*
* The image consists of pixel data as well as additional %image
* %info like interlace type, compression method, palette (for
* colormap-based images) etc. Provides methods to read and write
* images from/to a generic stream and to manipulate %image pixels.
*/
template< typename pixel >
class image
{
public:
/**
* \brief The pixel traits type for \c pixel.
*/
typedef pixel_traits< pixel > traits;
/**
* \brief The pixel buffer type for \c pixel.
*/
typedef pixel_buffer< pixel > pixbuf;
/**
* \brief Represents a row of image pixel data.
*/
typedef typename pixbuf::row_type row_type;
/**
* \brief A transformation functor to convert any image to
* appropriate color space.
*/
typedef convert_color_space< pixel > transform_convert;
/**
* \brief The default io transformation: does nothing.
*/
struct transform_identity
{
void operator()(io_base&) const {}
};
/**
* \brief Constructs an empty image.
*/
image()
: m_info(make_image_info< pixel >())
{
}
/**
* \brief Constructs an empty image of specified width and height.
*/
image(size_t width, size_t height)
: m_info(make_image_info< pixel >())
{
resize(width, height);
}
/**
* \brief Constructs an image reading data from specified file
* using default converting transform.
*/
explicit image(std::string const& filename)
{
read(filename, transform_convert());
}
/**
* \brief Constructs an image reading data from specified file
* using custom transformaton.
*/
template< class transformation >
image(std::string const& filename,
transformation const& transform)
{
read(filename.c_str(), transform);
}
/**
* \brief Constructs an image reading data from specified file
* using default converting transform.
*/
explicit image(char const* filename)
{
read(filename, transform_convert());
}
/**
* \brief Constructs an image reading data from specified file
* using custom transformaton.
*/
template< class transformation >
image(char const* filename, transformation const& transform)
{
read(filename, transform);
}
/**
* \brief Constructs an image reading data from a stream using
* default converting transform.
*/
explicit image(std::istream& stream)
{
read_stream(stream, transform_convert());
}
/**
* \brief Constructs an image reading data from a stream using
* custom transformation.
*/
template< class transformation >
image(std::istream& stream, transformation const& transform)
{
read_stream(stream, transform);
}
/**
* \brief Reads an image from specified file using default
* converting transform.
*/
void read(std::string const& filename)
{
read(filename, transform_convert());
}
/**
* \brief Reads an image from specified file using custom
* transformaton.
*/
template< class transformation >
void read(std::string const& filename, transformation const& transform)
{
read(filename.c_str(), transform);
}
/**
* \brief Reads an image from specified file using default
* converting transform.
*/
void read(char const* filename)
{
read(filename, transform_convert());
}
/**
* \brief Reads an image from specified file using custom
* transformaton.
*/
template< class transformation >
void read(char const* filename, transformation const& transform)
{
std::ifstream stream(filename, std::ios::binary);
if (!stream.is_open())
{
throw std_error(filename);
}
stream.exceptions(std::ios::badbit);
read_stream(stream, transform);
}
/**
* \brief Reads an image from a stream using default
* converting transform.
*/
void read(std::istream& stream)
{
read_stream(stream, transform_convert());
}
/**
* \brief Reads an image from a stream using custom
* transformation.
*/
template< class transformation >
void read(std::istream& stream, transformation const& transform)
{
read_stream(stream, transform);
}
/**
* \brief Reads an image from a stream using default
* converting transform.
*/
template< class istream >
void read_stream(istream& stream)
{
read_stream(stream, transform_convert());
}
/**
* \brief Reads an image from a stream using custom
* transformation.
*/
template< class istream, class transformation >
void read_stream(istream& stream, transformation const& transform)
{
pixel_consumer pixcon(m_info, m_pixbuf);
pixcon.read(stream, transform);
}
/**
* \brief Writes an image to specified file.
*/
void write(std::string const& filename)
{
write(filename.c_str());
}
/**
* \brief Writes an image to specified file.
*/
void write(char const* filename)
{
std::ofstream stream(filename, std::ios::binary);
if (!stream.is_open())
{
throw std_error(filename);
}
stream.exceptions(std::ios::badbit);
write_stream(stream);
}
/**
* \brief Writes an image to a stream.
*/
void write_stream(std::ostream& stream)
{
write_stream(stream);
}
/**
* \brief Writes an image to a stream.
*/
template< class ostream >
void write_stream(ostream& stream)
{
pixel_generator pixgen(m_info, m_pixbuf);
pixgen.write(stream);
}
/**
* \brief Returns a reference to image pixel buffer.
*/
pixbuf& get_pixbuf()
{
return m_pixbuf;
}
/**
* \brief Returns a const reference to image pixel buffer.
*/
pixbuf const& get_pixbuf() const
{
return m_pixbuf;
}
/**
* \brief Replaces the image pixel buffer.
*
* \param buffer a pixel buffer object to take a copy from
*/
void set_pixbuf(pixbuf const& buffer)
{
m_pixbuf = buffer;
}
size_t get_width() const
{
return m_pixbuf.get_width();
}
size_t get_height() const
{
return m_pixbuf.get_height();
}
/**
* \brief Resizes the image pixel buffer.
*/
void resize(size_t width, size_t height)
{
m_pixbuf.resize(width, height);
m_info.set_width(width);
m_info.set_height(height);
}
/**
* \brief Returns a reference to the row of image data at
* specified index.
*
* \see pixel_buffer::get_row()
*/
row_type& get_row(size_t index)
{
return m_pixbuf.get_row(index);
}
/**
* \brief Returns a const reference to the row of image data at
* specified index.
*
* \see pixel_buffer::get_row()
*/
row_type const& get_row(size_t index) const
{
return m_pixbuf.get_row(index);
}
/**
* \brief The non-checking version of get_row() method.
*/
row_type& operator[](size_t index)
{
return m_pixbuf[index];
}
/**
* \brief The non-checking version of get_row() method.
*/
row_type const& operator[](size_t index) const
{
return m_pixbuf[index];
}
/**
* \brief Returns a pixel at (x,y) position.
*/
pixel get_pixel(size_t x, size_t y) const
{
return m_pixbuf.get_pixel(x, y);
}
/**
* \brief Replaces a pixel at (x,y) position.
*/
void set_pixel(size_t x, size_t y, pixel p)
{
m_pixbuf.set_pixel(x, y, p);
}
interlace_type get_interlace_type() const
{
return m_info.get_interlace_type();
}
void set_interlace_type(interlace_type interlace)
{
m_info.set_interlace_type(interlace);
}
compression_type get_compression_type() const
{
return m_info.get_compression_type();
}
void set_compression_type(compression_type compression)
{
m_info.set_compression_type(compression);
}
filter_type get_filter_type() const
{
return m_info.get_filter_type();
}
void set_filter_type(filter_type filter)
{
m_info.set_filter_type(filter);
}
/**
* \brief Returns a reference to the image palette.
*/
palette& get_palette()
{
return m_info.get_palette();
}
/**
* \brief Returns a const reference to the image palette.
*/
palette const& get_palette() const
{
return m_info.get_palette();
}
/**
* \brief Replaces the image palette.
*/
void set_palette(palette const& plte)
{
m_info.set_palette(plte);
}
tRNS const& get_tRNS() const
{
return m_info.get_tRNS();
}
tRNS& get_tRNS()
{
return m_info.get_tRNS();
}
void set_tRNS(tRNS const& trns)
{
m_info.set_tRNS(trns);
}
protected:
/**
* \brief A common base class template for pixel_consumer and
* pixel_generator classes.
*/
template< typename base_impl >
class streaming_impl
: public base_impl
{
public:
streaming_impl(image_info& info, pixbuf& pixels)
: base_impl(info),
m_pixbuf(pixels)
{
}
/**
* \brief Returns the starting address of a \c pos-th row
* in the image's pixel buffer.
*/
byte* get_next_row(size_t pos)
{
typedef typename pixbuf::row_traits row_traits;
return reinterpret_cast< byte* >
(row_traits::get_data(m_pixbuf.get_row(pos)));
}
protected:
pixbuf& m_pixbuf;
};
/**
* \brief The pixel buffer adapter for reading pixel data.
*/
class pixel_consumer
: public streaming_impl< consumer< pixel,
pixel_consumer,
image_info_ref_holder,
/* interlacing = */ true > >
{
public:
pixel_consumer(image_info& info, pixbuf& pixels)
: streaming_impl< consumer< pixel,
pixel_consumer,
image_info_ref_holder,
true > >(info, pixels)
{
}
void reset(size_t pass)
{
if (pass == 0)
{
this->m_pixbuf.resize(this->get_info().get_width(),
this->get_info().get_height());
}
}
};
/**
* \brief The pixel buffer adapter for writing pixel data.
*/
class pixel_generator
: public streaming_impl< generator< pixel,
pixel_generator,
image_info_ref_holder,
/* interlacing = */ true > >
{
public:
pixel_generator(image_info& info, pixbuf& pixels)
: streaming_impl< generator< pixel,
pixel_generator,
image_info_ref_holder,
true > >(info, pixels)
{
}
};
image_info m_info;
pixbuf m_pixbuf;
};
} // namespace png
#endif // PNGPP_IMAGE_HPP_INCLUDED

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/*
* 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_IMAGE_INFO_HPP_INCLUDED
#define PNGPP_IMAGE_INFO_HPP_INCLUDED
#include "types.hpp"
#include "palette.hpp"
#include "tRNS.hpp"
#include "pixel_traits.hpp"
namespace png
{
/**
* \brief Holds information about PNG image.
*
* \see image, generator, consumer
*/
class image_info
{
public:
/**
* \brief Constructs the image_info object with default values
* for color_type, interlace_type, compression_method and
* filter_type.
*/
image_info()
: m_width(0),
m_height(0),
m_bit_depth(0),
m_color_type(color_type_none),
m_interlace_type(interlace_none),
m_compression_type(compression_type_default),
m_filter_type(filter_type_default)
{
}
size_t get_width() const
{
return m_width;
}
void set_width(size_t width)
{
m_width = width;
}
size_t get_height() const
{
return m_height;
}
void set_height(size_t height)
{
m_height = height;
}
color_type get_color_type() const
{
return m_color_type;
}
void set_color_type(color_type color_space)
{
m_color_type = color_space;
}
size_t get_bit_depth() const
{
return m_bit_depth;
}
void set_bit_depth(size_t bit_depth)
{
m_bit_depth = bit_depth;
}
interlace_type get_interlace_type() const
{
return m_interlace_type;
}
void set_interlace_type(interlace_type interlace)
{
m_interlace_type = interlace;
}
compression_type get_compression_type() const
{
return m_compression_type;
}
void set_compression_type(compression_type compression)
{
m_compression_type = compression;
}
filter_type get_filter_type() const
{
return m_filter_type;
}
void set_filter_type(filter_type filter)
{
m_filter_type = filter;
}
palette const& get_palette() const
{
return m_palette;
}
palette& get_palette()
{
return m_palette;
}
void set_palette(palette const& plte)
{
m_palette = plte;
}
/**
* \brief Removes all entries from the palette.
*/
void drop_palette()
{
m_palette.clear();
}
tRNS const& get_tRNS() const
{
return m_tRNS;
}
tRNS& get_tRNS()
{
return m_tRNS;
}
void set_tRNS(tRNS const& trns)
{
m_tRNS = trns;
}
protected:
uint_32 m_width;
uint_32 m_height;
size_t m_bit_depth;
color_type m_color_type;
interlace_type m_interlace_type;
compression_type m_compression_type;
filter_type m_filter_type;
palette m_palette;
tRNS m_tRNS;
};
/**
* \brief Returns an image_info object with color_type and
* bit_depth fields setup appropriate for the \c pixel type.
*/
template< typename pixel >
image_info
make_image_info()
{
typedef pixel_traits< pixel > traits;
image_info info;
info.set_color_type(traits::get_color_type());
info.set_bit_depth(traits::get_bit_depth());
return info;
}
} // namespace png
#endif // PNGPP_IMAGE_INFO_HPP_INCLUDED

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/*
* 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_INDEX_PIXEL_HPP_INCLUDED
#define PNGPP_INDEX_PIXEL_HPP_INCLUDED
#include "types.hpp"
#include "packed_pixel.hpp"
#include "pixel_traits.hpp"
namespace png
{
/**
* \brief The 8-bit Indexed (colormap) pixel type.
*/
class index_pixel
{
public:
index_pixel(byte index = 0)
: m_index(index)
{
}
operator byte() const
{
return m_index;
}
private:
byte m_index;
};
/**
* \brief The packed indexed pixel class template. The available
* specializations are for 1-, 2- and 4-bit pixels.
*/
template< size_t bits >
class packed_index_pixel
: public packed_pixel< bits >
{
public:
packed_index_pixel(byte value = 0)
: packed_pixel< bits >(value)
{
}
};
/**
* \brief The 1-bit Indexed pixel type.
*/
typedef packed_index_pixel< 1 > index_pixel_1;
/**
* \brief The 1-bit Indexed pixel type.
*/
typedef packed_index_pixel< 2 > index_pixel_2;
/**
* \brief The 1-bit Indexed pixel type.
*/
typedef packed_index_pixel< 4 > index_pixel_4;
/**
* \brief Pixel traits specialization for index_pixel.
*/
template<>
struct pixel_traits< index_pixel >
: basic_pixel_traits< index_pixel, byte, color_type_palette >
{
};
/**
* \brief Pixel traits specialization for packed_index_pixel.
*/
template< size_t bits >
struct pixel_traits< packed_index_pixel< bits > >
: basic_pixel_traits< packed_index_pixel< bits >, byte,
color_type_palette, /* channels = */ 1, bits >
{
};
} // namespace png
#endif // PNGPP_INDEX_PIXEL_HPP_INCLUDED

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/*
* 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_INFO_HPP_INCLUDED
#define PNGPP_INFO_HPP_INCLUDED
#include <cassert>
#include "info_base.hpp"
#include "image_info.hpp"
namespace png
{
/**
* \brief Holds information about PNG image. Adapter class for IO
* image operations.
*/
class info
: public info_base,
public image_info
{
public:
info(io_base& io, png_struct* png)
: info_base(io, png)
{
}
void read()
{
assert(m_png);
assert(m_info);
png_read_info(m_png, m_info);
png_get_IHDR(m_png,
m_info,
& m_width,
& m_height,
reinterpret_cast< int* >(& m_bit_depth),
reinterpret_cast< int* >(& m_color_type),
reinterpret_cast< int* >(& m_interlace_type),
reinterpret_cast< int* >(& m_compression_type),
reinterpret_cast< int* >(& m_filter_type));
if (png_get_valid(m_png, m_info, chunk_PLTE) == chunk_PLTE)
{
png_color* colors = 0;
int count = 0;
png_get_PLTE(m_png, m_info, & colors, & count);
m_palette.assign(colors, colors + count);
}
#ifdef PNG_tRNS_SUPPORTED
if (png_get_valid(m_png, m_info, chunk_tRNS) == chunk_tRNS)
{
if (m_color_type == color_type_palette)
{
int count;
byte* values;
if (png_get_tRNS(m_png, m_info, & values, & count, NULL)
!= PNG_INFO_tRNS)
{
throw error("png_get_tRNS() failed");
}
m_tRNS.assign(values, values + count);
}
}
#endif
}
void write() const
{
assert(m_png);
assert(m_info);
sync_ihdr();
if (m_color_type == color_type_palette)
{
if (! m_palette.empty())
{
png_set_PLTE(m_png, m_info,
const_cast< color* >(& m_palette[0]),
m_palette.size());
}
if (! m_tRNS.empty())
{
#ifdef PNG_tRNS_SUPPORTED
png_set_tRNS(m_png, m_info,
const_cast< byte* >(& m_tRNS[0]),
m_tRNS.size(),
NULL);
#else
throw error("attempted to write tRNS chunk;"
" recompile with PNG_tRNS_SUPPORTED");
#endif
}
}
png_write_info(m_png, m_info);
}
void update()
{
assert(m_png);
assert(m_info);
sync_ihdr();
png_read_update_info(m_png, m_info);
}
protected:
void sync_ihdr(void) const
{
png_set_IHDR(m_png,
m_info,
m_width,
m_height,
m_bit_depth,
m_color_type,
m_interlace_type,
m_compression_type,
m_filter_type);
}
};
} // namespace png
#endif // PNGPP_INFO_HPP_INCLUDED

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/*
* 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_INFO_BASE_HPP_INCLUDED
#define PNGPP_INFO_BASE_HPP_INCLUDED
#include <cassert>
#include "error.hpp"
#include "types.hpp"
namespace png
{
class io_base;
/**
* \brief Internal class to hold PNG info or end_info.
*/
class info_base
{
info_base(info_base const&);
info_base& operator=(info_base const&);
public:
info_base(io_base& io, png_struct* png)
: m_io(io),
m_png(png),
m_info(png_create_info_struct(m_png))
{
}
png_info* get_png_info() const
{
return m_info;
}
png_info** get_png_info_ptr()
{
return & m_info;
}
protected:
io_base& m_io;
png_struct* m_png;
png_info* m_info;
};
} // namespace png
#endif // PNGPP_INFO_BASE_HPP_INCLUDED

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/*
* 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_IO_BASE_HPP_INCLUDED
#define PNGPP_IO_BASE_HPP_INCLUDED
#include <cassert>
#include <cstdio>
#include <cstdarg>
#include "error.hpp"
#include "info.hpp"
#include "end_info.hpp"
static void
trace_io_transform(char const* fmt, ...)
{
#ifdef DEBUG_IO_TRANSFORM
va_list va;
va_start(va, fmt);
fprintf(stderr, "TRANSFORM_IO: ");
vfprintf(stderr, fmt, va);
va_end(va);
#endif
}
#define TRACE_IO_TRANSFORM trace_io_transform
namespace png
{
/**
* \brief Base class for PNG reader/writer classes.
*
* \see reader, writer
*/
class io_base
{
io_base(io_base const&);
io_base& operator=(io_base const&);
public:
explicit io_base(png_struct* png)
: m_png(png),
m_info(*this, m_png),
m_end_info(*this, m_png)
{
}
~io_base()
{
assert(! m_png);
assert(! m_info.get_png_info());
assert(! m_end_info.get_png_info());
}
png_struct* get_png_struct() const
{
return m_png;
}
info& get_info()
{
return m_info;
}
info const& get_info() const
{
return m_info;
}
image_info const& get_image_info() const
{
return m_info;
}
void set_image_info(image_info const& info)
{
static_cast< image_info& >(m_info) = info; // slice it
}
end_info& get_end_info()
{
return m_end_info;
}
end_info const& get_end_info() const
{
return m_end_info;
}
//////////////////////////////////////////////////////////////////////
// info accessors
//
size_t get_width() const
{
return m_info.get_width();
}
void set_width(size_t width)
{
m_info.set_width(width);
}
size_t get_height() const
{
return m_info.get_height();
}
void set_height(size_t height)
{
m_info.set_height(height);
}
color_type get_color_type() const
{
return m_info.get_color_type();
}
void set_color_type(color_type color_space)
{
m_info.set_color_type(color_space);
}
size_t get_bit_depth() const
{
return m_info.get_bit_depth();
}
void set_bit_depth(size_t bit_depth)
{
m_info.set_bit_depth(bit_depth);
}
interlace_type get_interlace_type() const
{
return m_info.get_interlace_type();
}
void set_interlace_type(interlace_type interlace)
{
m_info.set_interlace_type(interlace);
}
compression_type get_compression_type() const
{
return m_info.get_compression_type();
}
void set_compression_type(compression_type compression)
{
m_info.set_compression_type(compression);
}
filter_type get_filter_type() const
{
return m_info.get_filter_type();
}
void set_filter_type(filter_type filter)
{
m_info.set_filter_type(filter);
}
//////////////////////////////////////////////////////////////////////
bool has_chunk(chunk id)
{
return png_get_valid(m_png,
m_info.get_png_info(),
uint_32(id)) == uint_32(id);
}
#if defined(PNG_READ_EXPAND_SUPPORTED)
void set_gray_1_2_4_to_8() const
{
TRACE_IO_TRANSFORM("png_set_expand_gray_1_2_4_to_8\n");
png_set_expand_gray_1_2_4_to_8(m_png);
}
void set_palette_to_rgb() const
{
TRACE_IO_TRANSFORM("png_set_palette_to_rgb\n");
png_set_palette_to_rgb(m_png);
}
void set_tRNS_to_alpha() const
{
TRACE_IO_TRANSFORM("png_set_tRNS_to_alpha\n");
png_set_tRNS_to_alpha(m_png);
}
#endif // defined(PNG_READ_EXPAND_SUPPORTED)
#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
void set_bgr() const
{
TRACE_IO_TRANSFORM("png_set_bgr\n");
png_set_bgr(m_png);
}
#endif
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
void set_gray_to_rgb() const
{
TRACE_IO_TRANSFORM("png_set_gray_to_rgb\n");
png_set_gray_to_rgb(m_png);
}
#endif
#ifdef PNG_FLOATING_POINT_SUPPORTED
void set_rgb_to_gray(rgb_to_gray_error_action error_action
= rgb_to_gray_silent,
double red_weight = -1.0,
double green_weight = -1.0) const
{
TRACE_IO_TRANSFORM("png_set_rgb_to_gray: error_action=%d,"
" red_weight=%lf, green_weight=%lf\n",
error_action, red_weight, green_weight);
png_set_rgb_to_gray(m_png, error_action, red_weight, green_weight);
}
#else
void set_rgb_to_gray(rgb_to_gray_error_action error_action
= rgb_to_gray_silent,
fixed_point red_weight = -1,
fixed_point green_weight = -1) const
{
TRACE_IO_TRANSFORM("png_set_rgb_to_gray_fixed: error_action=%d,"
" red_weight=%d, green_weight=%d\n",
error_action, red_weight, green_weight);
png_set_rgb_to_gray_fixed(m_png, error_action,
red_weight, green_weight);
}
#endif // PNG_FLOATING_POINT_SUPPORTED
//////////////////////////////////////////////////////////////////////
// alpha channel transformations
//
#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
void set_strip_alpha() const
{
TRACE_IO_TRANSFORM("png_set_strip_alpha\n");
png_set_strip_alpha(m_png);
}
#endif
#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) \
|| defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
void set_swap_alpha() const
{
TRACE_IO_TRANSFORM("png_set_swap_alpha\n");
png_set_swap_alpha(m_png);
}
#endif
#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) \
|| defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
void set_invert_alpha() const
{
TRACE_IO_TRANSFORM("png_set_invert_alpha\n");
png_set_invert_alpha(m_png);
}
#endif
#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
void set_filler(uint_32 filler, filler_type type) const
{
TRACE_IO_TRANSFORM("png_set_filler: filler=%08x, type=%d\n",
filler, type);
png_set_filler(m_png, filler, type);
}
#if !defined(PNG_1_0_X)
void set_add_alpha(uint_32 filler, filler_type type) const
{
TRACE_IO_TRANSFORM("png_set_add_alpha: filler=%08x, type=%d\n",
filler, type);
png_set_add_alpha(m_png, filler, type);
}
#endif
#endif // PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED
#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
void set_swap() const
{
TRACE_IO_TRANSFORM("png_set_swap\n");
png_set_swap(m_png);
}
#endif
#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
void set_packing() const
{
TRACE_IO_TRANSFORM("png_set_packing\n");
png_set_packing(m_png);
}
#endif
#if defined(PNG_READ_PACKSWAP_SUPPORTED) \
|| defined(PNG_WRITE_PACKSWAP_SUPPORTED)
void set_packswap() const
{
TRACE_IO_TRANSFORM("png_set_packswap\n");
png_set_packswap(m_png);
}
#endif
#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
void set_shift(byte red_bits, byte green_bits, byte blue_bits,
byte alpha_bits = 0) const
{
TRACE_IO_TRANSFORM("png_set_shift: red_bits=%d, green_bits=%d,"
" blue_bits=%d, alpha_bits=%d\n",
red_bits, green_bits, blue_bits, alpha_bits);
if (get_color_type() != color_type_rgb
|| get_color_type() != color_type_rgb_alpha)
{
throw error("set_shift: expected RGB or RGBA color type");
}
color_info bits;
bits.red = red_bits;
bits.green = green_bits;
bits.blue = blue_bits;
bits.alpha = alpha_bits;
png_set_shift(m_png, & bits);
}
void set_shift(byte gray_bits, byte alpha_bits = 0) const
{
TRACE_IO_TRANSFORM("png_set_shift: gray_bits=%d, alpha_bits=%d\n",
gray_bits, alpha_bits);
if (get_color_type() != color_type_gray
|| get_color_type() != color_type_gray_alpha)
{
throw error("set_shift: expected Gray or Gray+Alpha"
" color type");
}
color_info bits;
bits.gray = gray_bits;
bits.alpha = alpha_bits;
png_set_shift(m_png, & bits);
}
#endif // PNG_READ_SHIFT_SUPPORTED || PNG_WRITE_SHIFT_SUPPORTED
#if defined(PNG_READ_INTERLACING_SUPPORTED) \
|| defined(PNG_WRITE_INTERLACING_SUPPORTED)
int set_interlace_handling() const
{
TRACE_IO_TRANSFORM("png_set_interlace_handling\n");
return png_set_interlace_handling(m_png);
}
#endif
#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
void set_invert_mono() const
{
TRACE_IO_TRANSFORM("png_set_invert_mono\n");
png_set_invert_mono(m_png);
}
#endif
#if defined(PNG_READ_16_TO_8_SUPPORTED)
void set_strip_16() const
{
TRACE_IO_TRANSFORM("png_set_strip_16\n");
png_set_strip_16(m_png);
}
#endif
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
void set_read_user_transform(png_user_transform_ptr transform_fn)
{
TRACE_IO_TRANSFORM("png_set_read_user_transform_fn\n");
png_set_read_user_transform_fn(m_png, transform_fn);
}
#endif
#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) \
|| defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
void set_user_transform_info(void* info, int bit_depth, int channels)
{
TRACE_IO_TRANSFORM("png_set_user_transform_info: bit_depth=%d,"
" channels=%d\n", bit_depth, channels);
png_set_user_transform_info(m_png, info, bit_depth, channels);
}
#endif
protected:
void* get_io_ptr() const
{
return png_get_io_ptr(m_png);
}
void set_error(char const* message)
{
assert(message);
m_error = message;
}
void reset_error()
{
m_error.clear();
}
/*
std::string const& get_error() const
{
return m_error;
}
*/
bool is_error() const
{
return !m_error.empty();
}
void raise_error()
{
longjmp(png_jmpbuf(m_png), -1);
}
static void raise_error(png_struct* png, char const* message)
{
io_base* io = static_cast< io_base* >(png_get_error_ptr(png));
io->set_error(message);
io->raise_error();
}
png_struct* m_png;
info m_info;
end_info m_end_info;
std::string m_error;
};
} // namespace png
#endif // PNGPP_IO_BASE_HPP_INCLUDED

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@ -1,84 +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_PACKED_PIXEL_HPP_INCLUDED
#define PNGPP_PACKED_PIXEL_HPP_INCLUDED
#include "types.hpp"
namespace png
{
namespace detail
{
template< size_t bits > class allowed_bit_depth;
template<> class allowed_bit_depth< 1 > {};
template<> class allowed_bit_depth< 2 > {};
template<> class allowed_bit_depth< 4 > {};
} // namespace detail
/**
* \brief The packed pixel class template.
*
* \see packed_gray_pixel, packed_index_pixel
*/
template< size_t bits >
class packed_pixel
: detail::allowed_bit_depth< bits >
{
public:
packed_pixel(byte value = 0)
: m_value(value & get_bit_mask())
{
}
operator byte() const
{
return m_value;
}
static size_t const get_bit_depth()
{
return bits;
}
static byte const get_bit_mask()
{
return (1 << bits) - 1;
}
private:
byte m_value;
};
} // namespace png
#endif // PNGPP_PACKED_PIXEL_HPP_INCLUDED

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/*
* 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_PALETTE_HPP_INCLUDED
#define PNGPP_PALETTE_HPP_INCLUDED
#include <vector>
#include "color.hpp"
namespace png
{
/**
* \brief The palette type. Currently implemented as \c std::vector
* of png::color.
*/
typedef std::vector< color > palette;
} // namespace png
#endif // PNGPP_PALETTE_HPP_INCLUDED

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/*
* 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_PIXEL_BUFFER_HPP_INCLUDED
#define PNGPP_PIXEL_BUFFER_HPP_INCLUDED
#include <cassert>
#include <cstddef>
#include <stdexcept>
#include <vector>
#include "packed_pixel.hpp"
#include "gray_pixel.hpp"
#include "index_pixel.hpp"
namespace png
{
/**
* \brief The pixel row traits class template. Provides a common
* way to get starting address of the row for packed and unpacked
* row types.
*
* Not implemented--see specializations.
*/
template< typename row > class row_traits;
/**
* \brief The basic class template to represent image pixel data.
*/
template< typename pixel,
typename row,
class traits = row_traits< row > >
class basic_pixel_buffer
{
public:
/**
* \brief A row of pixel data.
*/
typedef row row_type;
typedef traits row_traits;
/**
* \brief Constructs an empty 0x0 pixel buffer object.
*/
basic_pixel_buffer()
: m_width(0),
m_height(0)
{
}
/**
* \brief Constructs an empty pixel buffer object.
*/
basic_pixel_buffer(size_t width, size_t height)
: m_width(0),
m_height(0)
{
resize(width, height);
}
size_t get_width() const
{
return m_width;
}
size_t get_height() const
{
return m_height;
}
/**
* \brief Resizes the pixel buffer.
*
* If new width or height is greater than the original,
* expanded pixels are filled with value of \a pixel().
*/
void resize(size_t width, size_t height)
{
m_width = width;
m_height = height;
m_rows.resize(height);
for (typename row_vec::iterator r = m_rows.begin();
r != m_rows.end();
++r)
{
r->resize(width);
}
}
/**
* \brief Returns a reference to the row of image data at
* specified index.
*
* Checks the index before returning a row: an instance of
* std::out_of_range is thrown if \c index is greater than \c
* height.
*/
row_type& get_row(size_t index)
{
return m_rows.at(index);
}
/**
* \brief Returns a const reference to the row of image data at
* specified index.
*
* The checking version.
*/
row_type const& get_row(size_t index) const
{
return m_rows.at(index);
}
/**
* \brief The non-checking version of get_row() method.
*/
row_type& operator[](size_t index)
{
return m_rows[index];
}
/**
* \brief The non-checking version of get_row() method.
*/
row_type const& operator[](size_t index) const
{
return m_rows[index];
}
/**
* \brief Replaces the row at specified index.
*/
void put_row(size_t index, row_type const& r)
{
assert(r.size() == m_width);
m_rows.at(index) = r;
}
/**
* \brief Returns a pixel at (x,y) position.
*/
pixel get_pixel(size_t x, size_t y) const
{
return get_row(y).at(x);
}
/**
* \brief Replaces a pixel at (x,y) position.
*/
void set_pixel(size_t x, size_t y, pixel p)
{
get_row(y).at(x) = p;
}
protected:
size_t m_width;
size_t m_height;
typedef std::vector< row_type > row_vec;
row_vec m_rows;
};
/**
* \brief The row_traits specialization for unpacked pixel rows.
*/
template< typename pixel >
class row_traits< std::vector< pixel > >
{
public:
/**
* \brief Returns the starting address of the row.
*/
static pixel* get_data(std::vector< pixel >& vec)
{
assert(vec.size());
return & vec[0];
}
};
/**
* The pixel_buffer specialization for unpacked pixels.
*/
template< typename pixel >
class pixel_buffer
: public basic_pixel_buffer< pixel, std::vector< pixel > >
{
public:
pixel_buffer()
{
}
pixel_buffer(size_t width, size_t height)
: basic_pixel_buffer< pixel, std::vector< pixel > >(width, height)
{
}
};
namespace detail
{
template< class pixel, typename reference >
class basic_packed_pixel_proxy
{
public:
explicit basic_packed_pixel_proxy(reference ref)
: m_ref(ref),
m_shift(0)
{
}
basic_packed_pixel_proxy(reference ref, size_t index)
: m_ref(ref),
m_shift(get_shift(index))
{
}
operator pixel() const
{
return pixel((m_ref >> m_shift) & pixel::get_bit_mask());
}
protected:
/*
* bits: . . .
* 1: 7 6 5 4 3 2 1 0
* 2: 6 4 2 0
* 4: 4 0
*/
static size_t get_shift(size_t index)
{
size_t const bits = pixel::get_bit_depth();
return (8 - bits) - (index % get_pixels_per_byte()) * bits;
}
static size_t get_pixels_per_byte()
{
return 8 / pixel::get_bit_depth();
}
reference m_ref;
size_t m_shift;
};
template< class pixel >
class const_packed_pixel_proxy
: public basic_packed_pixel_proxy< pixel, byte const& >
{
public:
const_packed_pixel_proxy(byte const& ref, size_t index)
: basic_packed_pixel_proxy< pixel, byte const& >(ref, index)
{
}
};
template< class pixel >
class packed_pixel_proxy
: public basic_packed_pixel_proxy< pixel, byte& >
{
public:
typedef basic_packed_pixel_proxy< pixel, byte& > basic_proxy;
packed_pixel_proxy(byte& ref, size_t index)
: basic_proxy(ref, index)
{
}
packed_pixel_proxy(packed_pixel_proxy const& other)
: basic_proxy(other.m_ref)
{
this->m_shift = other.m_shift;
}
packed_pixel_proxy& operator=(packed_pixel_proxy const& other)
{
return *this = static_cast< pixel >(other);
}
template< typename reference >
packed_pixel_proxy&
operator=(basic_packed_pixel_proxy< pixel, reference > const& other)
{
return *this = static_cast< pixel >(other);
}
packed_pixel_proxy& operator=(pixel p)
{
this->m_ref = (this->m_ref
& ~(pixel::get_bit_mask() << this->m_shift))
| (p << this->m_shift);
return *this;
}
};
} // namespace detail
/**
* \brief The packed pixel row class template.
*
* Stores the pixel row as a std::vector of byte-s, providing
* access to individual packed pixels via proxy objects.
*/
template< class pixel >
class packed_pixel_row
{
public:
/**
* \brief Constructs a pixel row object for \c size packed pixels.
*/
explicit packed_pixel_row(size_t size = 0)
{
resize(size);
}
size_t size() const
{
return m_size;
}
/**
* \brief Resizes the pixel row to hold up to \c size packed pixels.
*/
void resize(size_t size)
{
m_vec.resize(size / get_pixels_per_byte()
+ (size % get_pixels_per_byte() ? 1 : 0));
m_size = size;
}
/**
* \brief The immutable packed pixel proxy type.
*/
typedef detail::const_packed_pixel_proxy< pixel > const_pixel_proxy;
/**
* \brief The mutable packed pixel proxy type.
*/
typedef detail::packed_pixel_proxy< pixel > pixel_proxy;
/**
* \brief Returns an immutable proxy the to the pixel at \c
* index.
*/
const_pixel_proxy at(size_t index) const
{
return const_pixel_proxy(m_vec.at(index / get_pixels_per_byte()),
index);
}
/**
* \brief Returns a mutable proxy the to the pixel at \c
* index.
*/
pixel_proxy at(size_t index)
{
return pixel_proxy(m_vec.at(index / get_pixels_per_byte()),
index);
}
/**
* \brief Returns an immutable proxy the to the pixel at \c
* index. The non-checking version.
*/
const_pixel_proxy operator[](size_t index) const
{
return const_pixel_proxy(m_vec[index / get_pixels_per_byte()],
index);
}
/**
* \brief Returns n mutable proxy the to the pixel at \c
* index. The non-checking version.
*/
pixel_proxy operator[](size_t index)
{
return pixel_proxy(m_vec[index / get_pixels_per_byte()],
index);
}
/**
* \brief Returns the starting address of the row.
*/
byte* get_data()
{
assert(m_vec.size());
return & m_vec[0];
}
private:
static size_t get_pixels_per_byte()
{
return 8 / pixel::get_bit_depth();
}
std::vector< byte > m_vec;
size_t m_size;
};
/**
* \brief The row_traits class template specialization for packed
* pixel row type.
*/
template< typename pixel >
class row_traits< packed_pixel_row< pixel > >
{
public:
/**
* \brief Returns the starting address of the row.
*/
static byte* get_data(packed_pixel_row< pixel >& row)
{
return row.get_data();
}
};
/**
* \brief The pixel buffer class template specialization for the
* packed_gray_pixel type.
*/
template< size_t bits >
class pixel_buffer< packed_gray_pixel< bits > >
: public basic_pixel_buffer< packed_gray_pixel< bits >,
packed_pixel_row< packed_gray_pixel
< bits > > >
{
public:
typedef packed_gray_pixel< bits > pixel_type;
typedef packed_pixel_row< pixel_type > pixel_row_type;
pixel_buffer()
{
}
pixel_buffer(size_t width, size_t height)
: basic_pixel_buffer< pixel_type,
pixel_row_type >(width, height)
{
}
};
/**
* \brief The pixel buffer class template specialization for the
* packed_index_pixel type.
*/
template< size_t bits >
class pixel_buffer< packed_index_pixel< bits > >
: public basic_pixel_buffer< packed_index_pixel< bits >,
packed_pixel_row< packed_index_pixel
< bits > > >
{
public:
typedef packed_index_pixel< bits > pixel_type;
typedef packed_pixel_row< pixel_type > pixel_row_type;
pixel_buffer()
{
}
pixel_buffer(size_t width, size_t height)
: basic_pixel_buffer< pixel_type,
pixel_row_type >(width, height)
{
}
};
} // namespace png
#endif // PNGPP_PIXEL_BUFFER_HPP_INCLUDED

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/*
* 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_PIXEL_TRAITS_HPP_INCLUDED
#define PNGPP_PIXEL_TRAITS_HPP_INCLUDED
#include <limits>
#include "types.hpp"
namespace png
{
/**
* \brief Pixel traits class template.
*
* Provides information about pixel color type and components bit depth.
* Not implemented--see specializations.
*
* \see pixel_traits<rgb_pixel>, pixel_traits<rgba_pixel>
*/
template< typename pixel > struct pixel_traits;
/**
* \brief Basic pixel traits class template.
*
* Provides common implementation for various pixel_traits<>
* specializations.
*/
template< typename pixel,
typename component,
color_type pixel_color_type,
size_t channels = sizeof(pixel) / sizeof(component),
size_t bit_depth = std::numeric_limits< component >::digits >
struct basic_pixel_traits
{
typedef pixel pixel_type;
typedef component component_type;
static color_type get_color_type()
{
return pixel_color_type;
}
static size_t get_channels()
{
return channels;
}
static size_t get_bit_depth()
{
return bit_depth;
}
};
/**
* \brief Basic pixel traits class template for pixels with alpha
* channel.
*/
template< typename component >
struct basic_alpha_pixel_traits
{
/**
* \brief Returns the default alpha channel filler for full
* opacity.
*/
static component get_alpha_filler()
{
return std::numeric_limits< component >::max();
}
};
} // namespace png
#endif // PNGPP_PIXEL_TRAITS_HPP_INCLUDED

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/*
* 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_PNG_HPP_INCLUDED
#define PNGPP_PNG_HPP_INCLUDED
#include <png.h>
#include "config.hpp"
#include "types.hpp"
#include "error.hpp"
#include "color.hpp"
#include "palette.hpp"
#include "tRNS.hpp"
#include "packed_pixel.hpp"
#include "rgb_pixel.hpp"
#include "rgba_pixel.hpp"
#include "gray_pixel.hpp"
#include "ga_pixel.hpp"
#include "index_pixel.hpp"
#include "info_base.hpp"
#include "info.hpp"
#include "end_info.hpp"
#include "io_base.hpp"
#include "reader.hpp"
#include "writer.hpp"
#include "generator.hpp"
#include "consumer.hpp"
#include "pixel_buffer.hpp"
#include "require_color_space.hpp"
#include "convert_color_space.hpp"
#include "image.hpp"
/**
* \mainpage
*
* \section sec_intro Introduction
*
* This is the documentation for png++ the C++ wrapper for libpng.
* This page documents png++ version 0.2.
*
* PNG++ aims to provide simple yet powerful C++ interface to libpng,
* the PNG reference implementation library. PNG++ is free software
* distributed under a modified variant of BSD <a
* href="http://www.nongnu.org/pngpp/license.html">license</a>.
*
* \section sec_news News
*
* - Added support for tRNS chunk.
* - Added non-std IO streams support.
* - Fixed 16-bit endianness problems.
* - Improved test script.
*
* \section sec_getting_started Getting started
*
* The following code demonstrates how to read and write PNG images
* using png++:
*
* \code
* png::image< png::rgb_pixel > image("input.png");
* image.write("output.png");
* \endcode
*
* The code reads an image from the file named \c input.png, then
* writes the image to a file named \c output.png. The image class
* template allows you to specify the desired pixel type for the image
* data. The available pixel types include: RGB, Grayscale and
* Indexed pixels. Some of the pixel types can have an alpha channel.
*
* The png++ naturally supports reading PNG images of any %color type
* into RGB or Grayscale pixel buffers (with optional alpha channel).
* This is particularly useful for an image viewer if it needs to
* display the PNG image on, for example, RGB device regardless of the
* image %color type.
*
* On the other hand one might want to read only images of particular
* type. With png++ you can specify it this way:
*
* \code
* png::image< png::rgb_pixel > image("rgb.png", png::require_color_space< png::rgb_pixel >());
* \endcode
*
* \section sec_installing Installing
*
* PNG++ comes as a set of header files and does not require
* compilation to be installed. For the same reason there are no
* binary packages for png++.
*
* \subsection subs_prerequisites Prerequisites
*
* - png++ works with libpng-1.2.x.
* - png++ compiles with g++-4.1 and g++-4.2. Other version should
* work well too.
* - png++ relies on GNU make for compiling tests and examples; in
* particular it uses "remaking makefiles" feature
* - Documentation is produced using <a
* href="http://www.doxygen.org/">doxygen</a>. See the bottom of
* this page for doxygen version used to compile these docs.
*
* \subsection subs_installing_pngpp Installing png++
*
* Follow these instructions in order to install png++:
*
* -# Unpack source package:
* \verbatim $ tar -zxf png++-0.2.x.tar.gz -C ~/src \endverbatim
* -# Go to your brand new png++ sources directory:
* \verbatim $ cd ~/src/png++-0.2.x \endverbatim
* -# Issue \c make to test how it's doing:
* \verbatim $ make \endverbatim
* This will compile examples in the \c example directory. If everything
* goes well, try \verbatim $ make test \endverbatim (or \c make \c
* check which is the same as above) to run the test suite. If tests
* do not produce error messages then probably all is OK.
* -# Now you can create documentation (optional). Use
* \verbatim $ make docs \endverbatim
* to run \c doxygen in the sources directory.
* -# Now it is time to become \c root and install png++ into your
* system. It's OK to issue \c make \c install under ordinary user
* permissions if you want to install png++ into your home
* directory. Run the following command:
* \verbatim $ make install PREFIX=$HOME \endverbatim
* to copy png++ header files to \c ~/include/png++ and documentation
* files to <tt>~/share/doc/png++-0.2.x</tt>. Without a \c PREFIX png++
* installs to \c /usr/local.
*
* \section sec_working_with_images Working with images
*
* In png++ you can create new images like this:
*
* \code
* #include <png++/png.hpp>
* //...
* png::image< png::rgb_pixel > image(128, 128);
* for (size_t y = 0; y < image.get_height(); ++y)
* {
* for (size_t x = 0; x < image.get_width(); ++x)
* {
* image[y][x] = png::rgb_pixel(x, y, x + y);
* // non-checking equivalent of image.set_pixel(x, y, ...);
* }
* }
* image.write("rgb.png");
* \endcode
*
* Optionally, you may specify
* \code
* image.set_interlace_type(png::interlace_adam7)
* \endcode
* to produce an interlaced image.
*
* If you are writing an indexed colors image, you should provide a
* palette (colormap). One of the ways to do this is the following:
*
* \code
* #include <png++/png.hpp>
* //...
* png::image< png::index_pixel > image;
* png::palette pal(256);
* for (size_t i = 0; i < pal.size(); ++i)
* {
* pal[i] = png::color(i, 255 - i, i);
* }
* image.set_palette(pal);
* ...
* image.write("palette.png");
* \endcode
*
* It is not absolutely necessary to have the whole image data in
* memory in order to write a PNG file. You can use generator class
* template to write the image row-by-row. An example of this is
* provided in \c example/pixel_generator.cpp bundled with the sources
* package.
*
* The same holds for reading images too. You can use consumer class
* template in order to read the image data row-by-row. This might
* help in applications which have to deal with large PNG images but
* do not want to read the entire image into memory.
*
* You can read or write images from/to generic IO stream, not only
* file on disk. Check out \c image::read(std::istream&),
* \c image::write(std::ostream&) overloads in the reference manual.
*
* \section sec_compiling_user Compiling your programs
*
* Use the following command to compile your program:
*
* \verbatim $ g++ -c example.cpp `libpng-config --cflags` \endverbatim
*
* and the following to link it:
*
* \verbatim $ g++ -o example example.o `libpng-config --ldflags` \endverbatim
*
* When compiling you should add \c -I \c $PREFIX/include if you have
* installed png++ to non-standard location, like your home directory.
*
* In your program, the line
*
* \code
* #include <png++/png.hpp>
* \endcode
*
* brings in all the header files in png++ which should be suitable
* for the most of the applications. You may include only the headers
* you really use, for example:
*
* \code
* #include <png++/image.hpp>
* #include <png++/rgb_pixel.hpp>
* \endcode
*
* If do not want to install png++ headers you still can compile your
* programs. Just create a subdirectory named \c png++ somewhere in
* your project tree and copy all of the \c .hpp files in png++
* distribution there. Then use appropriate compiler options to add
* this directory into the header search path.
*
* \section sec_further Further reading
*
* - To get information about specific features, use reference (can be
* reached from the top of this page).
* - If you are looking for more example code, please go to the \c
* example/ directory of the source distribution. You may also find
* sources in the \c test/ directory insightful (well, somewhat).
* - Have a question? Check out \ref sec_help section below.
* - Of course, your ultimate source for learning is the source
* code. <tt>:-)</tt>
*
* \section sec_download Download
*
* The project is hosted at Savannah:
* http://savannah.nongnu.org/projects/pngpp/
*
* Released source packages can be found here:
* http://download.savannah.nongnu.org/releases/pngpp/
*
* Also, you can check out sources directly from SVN repository:
* svn://svn.sv.nongnu.org/pngpp/trunk/ or
* http://svn.sv.nongnu.org/pngpp/trunk/ (for people w/o outgoing svn).
*
* Online version of this documentation can be found here:
* http://www.nongnu.org/pngpp/doc/0.2.3/index.html
*
* \section sec_bugs Bugs
*
* The following is a list of known bugs and limitations:
*
* - Lacks support for output transformations
* - Lacks support for optional/unknown chunks in PNG data stream
* - Documentation sucks <tt>;-)</tt>
*
* To report bugs, please use Savannah bug tracker:
* http://savannah.nongnu.org/bugs/?group=pngpp&func=additem
*
* Do not forget to check if the bug was already filed. <tt>:-)</tt>
*
* \section sec_help Getting help
*
* There is a mailing list for developers:
* http://lists.nongnu.org/mailman/listinfo/pngpp-devel
*
* You can also contact me by dropping a mail to <alex.shulgin@gmail.com>.
*
* Happy hacking!
*
* Alex Shulgin
*/
#endif // PNGPP_PNG_HPP_INCLUDED

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/*
* 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_READER_HPP_INCLUDED
#define PNGPP_READER_HPP_INCLUDED
#include <cassert>
#include "io_base.hpp"
namespace png
{
/**
* \brief The PNG reader class template. This is the low-level
* reading interface--use image class or consumer class to
* actually read images.
*
* The \c istream template parameter specifies the type of input
* stream to work with. The \c istream class should implement the
* minimum of the following interface:
*
* \code
* class my_istream
* {
* public:
* void read(char*, size_t);
* bool good();
* };
* \endcode
*
* With the semantics similar to the \c std::istream. Naturally,
* \c std::istream fits this requirement and can be used with the
* reader class as is.
*
* \see image, consumer, writer, io_base
*/
template< class istream >
class reader
: public io_base
{
public:
/**
* \brief Constructs a reader prepared to read PNG image from
* a \a stream.
*/
explicit reader(istream& stream)
: io_base(png_create_read_struct(PNG_LIBPNG_VER_STRING,
static_cast< io_base* >(this),
raise_error,
0))
{
png_set_read_fn(m_png, & stream, read_data);
}
~reader()
{
png_destroy_read_struct(& m_png,
m_info.get_png_info_ptr(),
m_end_info.get_png_info_ptr());
}
/**
* \brief Reads the whole PNG data stream into memory. Not
* particularly useful.
*/
void read_png()
{
if (setjmp(png_jmpbuf(m_png)))
{
throw error(m_error);
}
png_read_png(m_png,
m_info.get_png_info(),
/* transforms = */ 0,
/* params = */ 0);
}
/**
* \brief Reads info about PNG image.
*/
void read_info()
{
if (setjmp(png_jmpbuf(m_png)))
{
throw error(m_error);
}
m_info.read();
}
/**
* \brief Reads a row of image data at a time.
*/
void read_row(byte* bytes)
{
if (setjmp(png_jmpbuf(m_png)))
{
throw error(m_error);
}
png_read_row(m_png, bytes, 0);
}
/**
* \brief Reads ending info about PNG image.
*/
void read_end_info()
{
if (setjmp(png_jmpbuf(m_png)))
{
throw error(m_error);
}
m_end_info.read();
}
void update_info()
{
m_info.update();
}
private:
static void read_data(png_struct* png, byte* data, size_t length)
{
io_base* io = static_cast< io_base* >(png_get_error_ptr(png));
reader* rd = static_cast< reader* >(io);
rd->reset_error();
istream* stream = reinterpret_cast< istream* >(png_get_io_ptr(png));
try
{
stream->read(reinterpret_cast< char* >(data), length);
if (!stream->good())
{
rd->set_error("istream::read() failed");
}
}
catch (std::exception const& error)
{
rd->set_error(error.what());
}
catch (...)
{
assert(!"read_data: caught something wrong");
rd->set_error("read_data: caught something wrong");
}
if (rd->is_error())
{
rd->raise_error();
}
}
};
} // namespace png
#endif // PNGPP_READER_HPP_INCLUDED

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/*
* 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_REQUIRE_COLOR_SPACE_HPP_INCLUDED
#define PNGPP_REQUIRE_COLOR_SPACE_HPP_INCLUDED
#include "error.hpp"
#include "rgb_pixel.hpp"
#include "rgba_pixel.hpp"
#include "gray_pixel.hpp"
#include "ga_pixel.hpp"
#include "index_pixel.hpp"
#include "io_base.hpp"
namespace png
{
namespace detail
{
template< typename pixel >
struct wrong_color_space
{
inline static char const* error_msg();
};
template<> inline char const*
wrong_color_space< rgb_pixel >::error_msg()
{
return "8-bit RGB color space required";
}
template<> inline char const*
wrong_color_space< rgb_pixel_16 >::error_msg()
{
return "16-bit RGB color space required";
}
template<> inline char const*
wrong_color_space< rgba_pixel >::error_msg()
{
return "8-bit RGBA color space required";
}
template<> inline char const*
wrong_color_space< rgba_pixel_16 >::error_msg()
{
return "16-bit RGBA color space required";
}
template<> inline char const*
wrong_color_space< gray_pixel >::error_msg()
{
return "8-bit Grayscale color space required";
}
template<> inline char const*
wrong_color_space< gray_pixel_1 >::error_msg()
{
return "1-bit Grayscale color space required";
}
template<> inline char const*
wrong_color_space< gray_pixel_2 >::error_msg()
{
return "2-bit Grayscale color space required";
}
template<> inline char const*
wrong_color_space< gray_pixel_4 >::error_msg()
{
return "4-bit Grayscale color space required";
}
template<> inline char const*
wrong_color_space< gray_pixel_16 >::error_msg()
{
return "16-bit Grayscale color space required";
}
template<> inline char const*
wrong_color_space< ga_pixel >::error_msg()
{
return "8-bit Gray+Alpha color space required";
}
template<> inline char const*
wrong_color_space< ga_pixel_16 >::error_msg()
{
return "16-bit Gray+Alpha color space required";
}
template<> inline char const*
wrong_color_space< index_pixel >::error_msg()
{
return "8-bit Colormap color space required";
}
template<> inline char const*
wrong_color_space< index_pixel_1 >::error_msg()
{
return "1-bit Colormap color space required";
}
template<> inline char const*
wrong_color_space< index_pixel_2 >::error_msg()
{
return "2-bit Colormap color space required";
}
template<> inline char const*
wrong_color_space< index_pixel_4 >::error_msg()
{
return "4-bit Colormap color space required";
}
} // namespace detail
/**
* \brief IO transformation class template. Enforces image color space.
*
* This IO transformation class template used to enforce source image
* color space.
*
* \see image, image::read
*/
template< typename pixel >
struct require_color_space
{
typedef pixel_traits< pixel > traits;
void operator()(io_base& io) const
{
if (io.get_color_type() != traits::get_color_type()
|| io.get_bit_depth() != traits::get_bit_depth())
{
throw error(detail::wrong_color_space< pixel >::error_msg());
}
}
};
} // namespace png
#endif // PNGPP_REQUIRE_COLOR_SPACE_HPP_INCLUDED

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/*
* 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_RGB_PIXEL_HPP_INCLUDED
#define PNGPP_RGB_PIXEL_HPP_INCLUDED
#include "types.hpp"
#include "pixel_traits.hpp"
namespace png
{
/**
* \brief RGB pixel type.
*/
template< typename T >
struct basic_rgb_pixel
{
/**
* \brief Default constructor. Initializes all components
* with zeros.
*/
basic_rgb_pixel()
: red(0), green(0), blue(0)
{
}
/**
* \brief Constructs rgb_pixel object from \a red, \a green
* and \a blue components passed as parameters.
*/
basic_rgb_pixel(T red, T green, T blue)
: red(red), green(green), blue(blue)
{
}
T red;
T green;
T blue;
};
/**
* The 8-bit RGB pixel type.
*/
typedef basic_rgb_pixel< byte > rgb_pixel;
/**
* The 16-bit RGB pixel type.
*/
typedef basic_rgb_pixel< uint_16 > rgb_pixel_16;
/**
* \brief Pixel traits specialization for basic_rgb_pixel.
*/
template< typename T >
struct pixel_traits< basic_rgb_pixel< T > >
: basic_pixel_traits< basic_rgb_pixel< T >, T, color_type_rgb >
{
};
} // namespace png
#endif // PNGPP_RGB_PIXEL_HPP_INCLUDED

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/*
* 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_RGBA_PIXEL_HPP_INCLUDED
#define PNGPP_RGBA_PIXEL_HPP_INCLUDED
#include "types.hpp"
#include "pixel_traits.hpp"
namespace png
{
/**
* \brief RGBA pixel type.
*/
template< typename T >
struct basic_rgba_pixel
{
typedef pixel_traits< basic_rgba_pixel< T > > traits;
/**
* \brief Default constructor. Initializes all components
* with zeros.
*/
basic_rgba_pixel()
: red(0), green(0), blue(0), alpha(0)
{
}
/**
* \brief Constructs rgba_pixel object from \a red, \a green,
* \a blue and \a alpha components passed as parameters.
* Alpha defaults to full opacity.
*/
basic_rgba_pixel(T red, T green, T blue,
T alpha = traits::get_alpha_filler())
: red(red), green(green), blue(blue), alpha(alpha)
{
}
T red;
T green;
T blue;
T alpha;
};
/**
* The 8-bit RGBA pixel type.
*/
typedef basic_rgba_pixel< byte > rgba_pixel;
/**
* The 16-bit RGBA pixel type.
*/
typedef basic_rgba_pixel< uint_16 > rgba_pixel_16;
/**
* \brief Pixel traits specialization for basic_rgba_pixel.
*/
template< typename T >
struct pixel_traits< basic_rgba_pixel< T > >
: basic_pixel_traits< basic_rgba_pixel< T >, T, color_type_rgba >,
basic_alpha_pixel_traits< T >
{
};
} // namespace png
#endif // PNGPP_RGBA_PIXEL_HPP_INCLUDED

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/*
* 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_STREAMING_BASE_HPP_INCLUDED
#define PNGPP_STREAMING_BASE_HPP_INCLUDED
#include <cassert>
#include "image_info.hpp"
#include "pixel_traits.hpp"
namespace png
{
/**
* \brief The default image_info holder class. Stores image_info
* member object.
*/
class def_image_info_holder
{
public:
def_image_info_holder(image_info const& info)
: m_info(info)
{
}
image_info& get_info()
{
return m_info;
}
private:
image_info m_info;
};
/**
* \brief An image_info holder class. Stores a reference to the
* image_info object. The image_info object itself should be
* stored elsewhere.
*/
class image_info_ref_holder
{
public:
image_info_ref_holder(image_info& info)
: m_info(info)
{
}
image_info& get_info()
{
return m_info;
}
private:
image_info& m_info;
};
/**
* \brief A base class template for consumer and generator
* classes. Provides default \c reset() method implementation as
* well as \c info_holder policy.
*/
template< typename pixel, class info_holder >
class streaming_base
{
public:
typedef pixel_traits< pixel > traits;
explicit streaming_base(image_info& info)
: m_info_holder(info)
{
}
streaming_base(size_t width, size_t height)
: m_info_holder(make_image_info< pixel >())
{
get_info().set_width(width);
get_info().set_height(height);
}
image_info const& get_info() const
{
return m_info_holder.get_info();
}
protected:
void reset(size_t /*pass*/)
{
// nothing to do in the most general case
}
image_info& get_info()
{
return m_info_holder.get_info();
}
info_holder m_info_holder;
};
} // namespace png
#endif // PNGPP_STREAMING_BASE_HPP_INCLUDED

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/*
* 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_TRNS_HPP_INCLUDED
#define PNGPP_TRNS_HPP_INCLUDED
#include <vector>
#include "color.hpp"
namespace png
{
/**
* \brief The palette transparency map type. Currently
* implemented as \c std::vector of png::byte.
*/
typedef std::vector< byte > tRNS;
} // namespace png
#endif // PNGPP_TRNS_HPP_INCLUDED

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/*
* 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_TYPES_HPP_INCLUDED
#define PNGPP_TYPES_HPP_INCLUDED
#include <png.h>
namespace png
{
typedef png_byte byte;
typedef png_uint_16 uint_16;
typedef png_uint_32 uint_32;
typedef png_fixed_point fixed_point;
typedef png_color_8 color_info;
typedef png_color_16 color_info_16;
enum color_type
{
color_type_none = -1,
color_type_gray = PNG_COLOR_TYPE_GRAY,
color_type_palette = PNG_COLOR_TYPE_PALETTE,
color_type_rgb = PNG_COLOR_TYPE_RGB,
color_type_rgb_alpha = PNG_COLOR_TYPE_RGB_ALPHA,
color_type_gray_alpha = PNG_COLOR_TYPE_GRAY_ALPHA,
color_type_rgba = PNG_COLOR_TYPE_RGBA,
color_type_ga = PNG_COLOR_TYPE_GA
};
enum color_mask
{
color_mask_palette = PNG_COLOR_MASK_PALETTE,
color_mask_color = PNG_COLOR_MASK_COLOR,
color_mask_rgb = color_mask_color,
color_mask_alpha = PNG_COLOR_MASK_ALPHA
};
enum filler_type
{
filler_before = PNG_FILLER_BEFORE,
filler_after = PNG_FILLER_AFTER
};
enum rgb_to_gray_error_action
{
rgb_to_gray_silent = 1,
rgb_to_gray_warning = 2,
rgb_to_gray_error = 3
};
enum interlace_type
{
interlace_none = PNG_INTERLACE_NONE,
interlace_adam7 = PNG_INTERLACE_ADAM7
};
enum compression_type
{
compression_type_base = PNG_COMPRESSION_TYPE_BASE,
compression_type_default = PNG_COMPRESSION_TYPE_DEFAULT
};
enum filter_type
{
filter_type_base = PNG_FILTER_TYPE_BASE,
intrapixel_differencing = PNG_INTRAPIXEL_DIFFERENCING,
filter_type_default = PNG_FILTER_TYPE_DEFAULT
};
enum chunk
{
chunk_gAMA = PNG_INFO_gAMA,
chunk_sBIT = PNG_INFO_sBIT,
chunk_cHRM = PNG_INFO_cHRM,
chunk_PLTE = PNG_INFO_PLTE,
chunk_tRNS = PNG_INFO_tRNS,
chunk_bKGD = PNG_INFO_bKGD,
chunk_hIST = PNG_INFO_hIST,
chunk_pHYs = PNG_INFO_pHYs,
chunk_oFFs = PNG_INFO_oFFs,
chunk_tIME = PNG_INFO_tIME,
chunk_pCAL = PNG_INFO_pCAL,
chunk_sRGB = PNG_INFO_sRGB,
chunk_iCCP = PNG_INFO_iCCP,
chunk_sPLT = PNG_INFO_sPLT,
chunk_sCAL = PNG_INFO_sCAL,
chunk_IDAT = PNG_INFO_IDAT
};
} // namespace png
#endif // PNGPP_TYPES_HPP_INCLUDED

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src/png++-0.2.5/writer.hpp
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@ -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, 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