claw::graphic::targa::writer::file_output_buffer< Pixel > Class Template Reference

The type of the output buffer associated with the file when encoding RLE data. More...

#include <targa.hpp>

List of all members.

Public Types
typedef Pixel	pixel_type
	The type of the pixels in the input buffer.
typedef pixel_type	pattern_type
Public Member Functions
	file_output_buffer (std::ostream &os)
	Constructor.
void	encode (unsigned int n, pattern_type pattern)
	Code a pixel.
template<typename Iterator >
void	raw (Iterator first, Iterator last)
	Write raw data int the stream.
unsigned int	min_interesting () const
	Get the minimum number of pixels needed for encoding.
unsigned int	max_encodable () const
	Get the maximum number of pixel a code can encode.
void	order_pixel_bytes (const pixel_type &p)
template<>
void	order_pixel_bytes (const pixel_type &p)
Private Attributes
std::ostream &	m_stream
	The stream in which we write.

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Detailed Description

template<typename Pixel>
class claw::graphic::targa::writer::file_output_buffer< Pixel >

The type of the output buffer associated with the file when encoding RLE data.

Template parameters

• Pixel, the type of the pixels in the output buffer.

Definition at line 419 of file targa.hpp.

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Member Typedef Documentation

template<typename Pixel>

typedef pixel_type claw::graphic::targa::writer::file_output_buffer< Pixel >::pattern_type

Definition at line 425 of file targa.hpp.

template<typename Pixel>

typedef Pixel claw::graphic::targa::writer::file_output_buffer< Pixel >::pixel_type

The type of the pixels in the input buffer.

Definition at line 423 of file targa.hpp.

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Constructor & Destructor Documentation

template<typename Pixel >

claw::graphic::targa::writer::file_output_buffer< Pixel >::file_output_buffer

(

std::ostream &

os

)

Constructor.

Parameters:

os

The

Definition at line 47 of file targa_writer.tpp.

  : m_stream(os)
{

} // targa::writer::file_output_buffer::file_output_buffer()

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Member Function Documentation

template<typename Pixel >

void claw::graphic::targa::writer::file_output_buffer< Pixel >::encode	(	unsigned int	n,
		pattern_type	pattern
	)

Code a pixel.

Parameters:

n	The number of time the pixel appears.
pattern	The value of the pixel.

Definition at line 61 of file targa_writer.tpp.

{
  assert( n <= max_encodable() );
  assert( n >= min_interesting() );

  unsigned char key = (n-1) | 0x80;

  m_stream << key;
  order_pixel_bytes( pattern );
} // targa::writer::file_output_buffer::encode()

template<typename Pixel >

unsigned int claw::graphic::targa::writer::file_output_buffer< Pixel >::max_encodable

(

)

const

Get the maximum number of pixel a code can encode.

Definition at line 126 of file targa_writer.tpp.

{
  return 0x80;
} // targa::writer::file_output_buffer::max_encodable()

template<typename Pixel >

unsigned int claw::graphic::targa::writer::file_output_buffer< Pixel >::min_interesting

(

)

const

Get the minimum number of pixels needed for encoding.

Definition at line 115 of file targa_writer.tpp.

{
  return 2;
} // targa::writer::file_output_buffer::min_interesting()

template<>

void claw::graphic::targa::writer::file_output_buffer< claw::graphic::rgba_pixel_8 >::order_pixel_bytes

(

const pixel_type &

p

)

Remarks:

This method is specialized for the pixels of type claw::graphic::pixel32.

Definition at line 52 of file targa_writer.cpp.

    {
      m_stream << p.components.blue << p.components.green
         << p.components.red << p.components.alpha;
    } // targa::writer::file_output_buffer::order_pixel_bytes()

template<typename Pixel>

void claw::graphic::targa::writer::file_output_buffer< Pixel >::order_pixel_bytes

(

const pixel_type &

p

)

Referenced by claw::graphic::targa::writer::save_true_color().

template<typename Pixel >

template<typename Iterator >

void claw::graphic::targa::writer::file_output_buffer< Pixel >::raw	(	Iterator	first,
		Iterator	last
	)

Write raw data int the stream.

Parameters:

first	Iterator on the first data.
last	Iterator past the last data.

Definition at line 81 of file targa_writer.tpp.

{
  unsigned int n = std::distance(first, last);

  unsigned int full = n / max_encodable();
  unsigned int remaining = n % max_encodable();

  unsigned char key = max_encodable() - 1;

  for (unsigned int i=0; i!=full; ++i)
    {
      m_stream << key;

      for (unsigned int j=0; j!=max_encodable(); ++j, ++first)
        order_pixel_bytes( *first );
    }

  if (remaining)
    {
      key = remaining - 1;
      m_stream << key;
      
      for (unsigned int j=0; j!=remaining; ++j, ++first)
        order_pixel_bytes( *first );
    }

} // targa::writer::file_output_buffer::raw()

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Member Data Documentation

template<typename Pixel>

std::ostream& claw::graphic::targa::writer::file_output_buffer< Pixel >::m_stream [private]

The stream in which we write.

Definition at line 441 of file targa.hpp.

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

• targa.hpp
• impl/targa_writer.tpp