/usr/include/claw/bitmap.hpp is in libclaw-graphic-dev 1.7.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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CLAW - a C++ Library Absolutely Wonderful
CLAW is a free library without any particular aim but being useful to
anyone.
Copyright (C) 2005-2011 Julien Jorge
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
contact: julien.jorge@gamned.org
*/
/**
* \file bitmap.hpp
* \brief A class for bitmap pictures.
* \author Julien Jorge
*/
#ifndef __CLAW_BITMAP_HPP__
#define __CLAW_BITMAP_HPP__
#include <iostream>
#include <vector>
#include <claw/image.hpp>
#include <claw/rle_decoder.hpp>
#include <claw/color_palette.hpp>
#include <claw/buffered_istream.hpp>
namespace claw
{
namespace graphic
{
/**
* \brief A class for bitmap images.
* \author Julien Jorge
*/
class bitmap : public image
{
private:
/**
* \brief Tool class used for defining the structures of the datas stored
* in a bitmap file.
* \author Julien Jorge
*/
class file_structure
{
public:
/** \brief The type of the color palette for low color image files. */
typedef color_palette<rgba_pixel_8> color_palette_type;
/** \brief Compression mode. */
enum compression
{
BMP_COMPRESSION_RGB = 0,
BMP_COMPRESSION_RLE8 = 1,
BMP_COMPRESSION_RLE4 = 2,
BMP_COMPRESSION_BITFIELDS = 3
};
# pragma pack (push,2)
/**
* \brief Header of a bitmap file.
*/
struct header
{
/** \brief File identifier (must be 'BM'). */
char id[2];
/** \brief File's size. */
unsigned int file_size;
/** \brief not used. */
unsigned int nop;
/** \brief Begininf of the datas. */
unsigned int data_offset;
/** \brief Header's size. */
unsigned int header_size;
/** \brief Image's width. */
unsigned int width;
/** \brief Image's height. */
unsigned int height;
/** \brief Number of layers. */
unsigned short layers;
/** \brief Bits per pixel. */
unsigned short bpp;
/** \brief Compression algorithm. */
unsigned int compression;
/** \brief Image's size (bytes). */
unsigned int image_size;
/** \brief Horizontal resolution (pixels per meter). */
unsigned int ppm_x;
/** \brief Vertical resolution (pixels per meter). */
unsigned int ppm_y;
/** \brief Number of colors. */
unsigned int colors_count;
/** \brief Number of important colors. */
unsigned int importants_colors;
};
# pragma pack (pop)
}; // class file_structure
public:
/*----------------------------------------------------------------------*/
/**
* \brief This class read data from a bitmap file and store it in an
* image.
* \author Julien Jorge
*/
class reader : private file_structure
{
private:
/** \brief The type of the input buffer associated with the file when
decoding RLE files. */
typedef buffered_istream<std::istream> file_input_buffer;
/**
* \brief The output buffer for the RLE decoder.
*
* \b Template \b parameters
* - Coded4bits, true is the RLE patterns are coded in four bits ;
* otherwise the patterns are supposed to be on eight
* bits.
*
* \author Julien Jorge
*/
template< bool Coded4bits >
class rle_bitmap_output_buffer
{
public:
rle_bitmap_output_buffer( const color_palette_type& palette,
image& image );
void fill( unsigned int n, unsigned char pattern );
void copy( unsigned int n, file_input_buffer& buffer );
void next_line();
void delta_move(unsigned char x, unsigned char y);
private:
/** \brief Color palette. */
const color_palette_type& m_palette;
/** \brief The image to fill. */
image& m_image;
/** \brief Current column index in the bitmap. */
unsigned int m_x;
/** \brief Current row index in the bitmap. */
unsigned int m_y;
}; // class rle_bitmap_output_buffer
/**
* \brief RLE decoder for bitmap RLE format
*
* \b Template \b parameters :
* - \a OutputBuffer The type of the output buffer.
*
* The \a OutputBuffer type must match the type requirements of the
* template parameter OutputBuffer of the rle_decoder class, plus two
* methods :
* - next_line(), set the output position at the begining of the next
* line.
* - delta_move( unsigned char x, unsigned char y ), move the output
* position \a x pixels right and \a y pixels down.
*
* \author Julien Jorge
*/
template< typename OutputBuffer >
class rle_bitmap_decoder
: public rle_decoder< char, file_input_buffer, OutputBuffer >
{
public:
/** \brief Type of the output buffer. */
typedef OutputBuffer output_buffer_type;
private:
virtual void read_mode( file_input_buffer& input,
output_buffer_type& output );
}; // class rle_bitmap_decoder
/** \brief RLE decoder for 4 bpp bitmap images. */
typedef
rle_bitmap_decoder< rle_bitmap_output_buffer<true> > rle4_decoder;
/** \brief RLE decoder for 8 bpp bitmap images. */
typedef rle_bitmap_decoder< rle_bitmap_output_buffer<false> >
rle8_decoder;
/**
* \brief Functor converting a 1bpp buffer to a 32bpp buffer.
*/
class pixel1_to_pixel32
{
public:
void operator()( scanline& dest, const char* src,
const color_palette_type& palette ) const;
}; // class pixel1_to_pixel32
/**
* \brief Functor converting a 4bpp buffer to a 32bpp buffer.
*/
class pixel4_to_pixel32
{
public:
void operator()( scanline& dest, const char* src,
const color_palette_type& palette ) const;
}; // class pixel4_to_pixel32
/**
* \brief Functor converting a 8bpp buffer to a 32bpp buffer.
*/
class pixel8_to_pixel32
{
public:
void operator()( scanline& dest, const char* src,
const color_palette_type& palette ) const;
}; // class pixel8_to_pixel32
/**
* \brief Functor converting a 24bpp buffer to a 32bpp buffer.
*/
class pixel24_to_pixel32
{
public:
void operator()( scanline& dest, const char* src,
const color_palette_type& palette ) const;
}; // class pixel24_to_pixel32
public:
reader( image& img );
reader( image& img, std::istream& f );
void load( std::istream& f );
private:
void load_palette( const header& h, std::istream& f,
color_palette_type& palette ) const;
void load_1bpp( const header& h, std::istream& f );
void load_4bpp( const header& h, std::istream& f );
void load_8bpp( const header& h, std::istream& f );
void load_24bpp( const header& h, std::istream& f );
void load_4bpp_rle( const header& h, std::istream& f,
const color_palette_type& palette );
void load_4bpp_rgb( const header& h, std::istream& f,
const color_palette_type& palette );
void load_8bpp_rle( const header& h, std::istream& f,
const color_palette_type& palette );
void load_8bpp_rgb( const header& h, std::istream& f,
const color_palette_type& palette );
template<typename Convert>
void load_rgb_data( std::istream& f, unsigned int buffer_size,
const color_palette_type& palette,
const Convert& pixel_convert );
private:
/** \brief The image in which we store the data we read. */
image& m_image;
}; // class reader
/*----------------------------------------------------------------------*/
/**
* \brief This class write an image in a bitmap file.
* \author Julien Jorge
*/
class writer : private file_structure
{
public:
writer( const image& img );
writer( const image& img, std::ostream& f );
void save( std::ostream& f ) const;
private:
void save_data( std::ostream& f ) const;
void pixel32_to_pixel24( char* dest, const scanline& src ) const;
void init_header( header& h ) const;
private:
/** \brief The image from which we read the data. */
const image& m_image;
}; // class writer
public:
bitmap( unsigned int w, unsigned int h );
bitmap( const image& that );
bitmap( std::istream& f );
void save( std::ostream& f ) const;
}; // class bitmap
} // namespace graphic
} // namespace claw
#include <claw/impl/bitmap_reader.tpp>
#endif // __CLAW_BITMAP_HPP__
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