claw::graphic::xbm::writer Class Reference

This class write an image in a xbm file. More...

#include <xbm.hpp>

List of all members.

Classes
struct	options
	Parameters of the writing algorithm. More...
Public Member Functions
	writer (const image &img)
	Constructor.
	writer (const image &img, std::ostream &f, const options &opt=options())
	Constructor.
void	save (std::ostream &f, const options &opt=options()) const
	Save the image in a XBM file.
Private Member Functions
void	save_bits (std::ostream &f) const
	Save the pixels of the image in a XBM file.
Private Attributes
const image &	m_image
	The image from which we take the data to save.

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Detailed Description

This class write an image in a xbm file.

Author:

Julien Jorge

Definition at line 94 of file xbm.hpp.

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Constructor & Destructor Documentation

claw::graphic::xbm::writer::writer

(

const image &

img

)

Constructor.

Parameters:

img

The image in which the data will be stored.

Definition at line 64 of file xbm_writer.cpp.

  : m_image( img )
{

} // xbm::writer::writer()

claw::graphic::xbm::writer::writer	(	const image &	img,
		std::ostream &	f,
		const options &	opt = options()
	)

Constructor.

Parameters:

	img	The image to save.
	f	The file in which we write the data.
	opt	Saving options.

Definition at line 78 of file xbm_writer.cpp.

References claw::graphic::xbm::save().

  : m_image( img )
{
  save(f, opt);
} // xbm::writer::writer()

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Member Function Documentation

void claw::graphic::xbm::writer::save	(	std::ostream &	f,
		const options &	opt = options()
	)			const

Save the image in a XBM file.

Parameters:

	f	XBM file.
	opt	Saving options.

Definition at line 91 of file xbm_writer.cpp.

References CLAW_PRECOND, claw::graphic::image::height(), claw::graphic::xbm::writer::options::hot, m_image, claw::graphic::xbm::writer::options::name, save_bits(), claw::graphic::image::width(), claw::math::coordinate_2d< T >::x, and claw::math::coordinate_2d< T >::y.

{
  CLAW_PRECOND( !!f );

  f << "#define " << opt.name << "_width " << m_image.width() << "\n";
  f << "#define " << opt.name << "_height " << m_image.height() << "\n";

  if ( opt.hot != NULL )
    {
      f << "#define " << opt.name << "_x_hot " << opt.hot->x << "\n";
      f << "#define " << opt.name << "_y_hot " << opt.hot->y << "\n";
    }

  f << "static unsigned char " << opt.name << "_bits[] = {\n ";

  save_bits(f);
} // xbm::writer::save()

void claw::graphic::xbm::writer::save_bits

(

std::ostream &

f

)

const [private]

Save the pixels of the image in a XBM file.

Parameters:

f

XBM file.

Definition at line 114 of file xbm_writer.cpp.

References claw::graphic::image::height(), m_image, and claw::graphic::image::width().

Referenced by save().

{
  const unsigned int max_per_line = (80 - 1) / 6;
  const unsigned int nb_pxl = m_image.width() * m_image.height();

  unsigned int pxl_count = 0;
  unsigned int per_line = 0;

  for (unsigned int y=0; y!=m_image.height(); ++y)
    {
      unsigned int x=0;

      while ( x!=m_image.width() )
        {
          unsigned int v(0);
          unsigned int bits;

          for ( bits=0; (x!=m_image.width()) && (bits != 8);
                ++bits, ++x, ++pxl_count )
            {
              v >>= 1;
              if ( m_image[y][x].luminosity() <= 127 )
                v |= 0x80;
            }

          v >>= 8 - bits;

          ++per_line;

          f << " 0x" << std::setw(2) << std::setfill('0') << std::hex << v;

          if ( pxl_count != nb_pxl )
            {
              f  << ",";

              if ( per_line == max_per_line )
                {
                  f << "\n ";
                  per_line = 0;
                }
            }
        }
    }

  f << "};" << std::endl;
} // xbm::writer::save()

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Member Data Documentation

const image& claw::graphic::xbm::writer::m_image [private]

The image from which we take the data to save.

Definition at line 129 of file xbm.hpp.

Referenced by save(), and save_bits().

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The documentation for this class was generated from the following files:

• xbm.hpp
• code/xbm_writer.cpp