Vga_console Class Reference

Console implementation for VGA. More...

#include <vga_console.h>

Inheritance diagram for Vga_console:

List of all members.

Public Member Functions
void	clear ()
	Clear the screen,.
void	scroll (unsigned n)
	Scroll the screen n lines up.
Address	video_base () const
	Get the base address for the VGA memory.
void	video_base (Address base)
	Set the base address of the VGA memory.
	Vga_console (Address base, unsigned width=80, unsigned height=25, bool light_white=false, bool use_color=false)
	Create a new instance of a VGA console.
	~Vga_console ()
	dtor.
int	write (char const *str, size_t len)
	Output method.
int	getchar (bool blocking=true)
	Empty implementation.
bool const	is_working ()
Mword	get_attributes () const
	Console attributes.
Private Types
enum	{ MAX_ANSI_ESC_ARGS = 5 }
Private Member Functions
void	blink_cursor (unsigned x, unsigned y)
	Set blinking screen cursor.
int	seq_6 (char const *str, size_t len, unsigned &pos)
int	seq_1 (char const *, size_t, unsigned &)
int	seq_5 (char const *, size_t, unsigned &)
void	ansi_attrib (int a)
void	esc_write (char const *str, size_t len, unsigned &i)
void	ansi_esc_write (char const *str, size_t len, unsigned &i)
void	normal_write (char const *str, size_t len, unsigned &i)
Private Attributes
Vga_console::VChar	packed
	Type of a on screen character.
VChar *	_video_base
Address	_crtc
unsigned	_width
unsigned	_height
unsigned	_x
unsigned	_y
unsigned	_attribute
int	ansi_esc_args [MAX_ANSI_ESC_ARGS]
unsigned	num_ansi_esc_args
void(Vga_console::*	wr )(char const *, size_t, unsigned &)
bool const	_light_white
bool const	_use_color
bool	_is_working
Classes
struct	VChar
	Type of a on screen character. More...

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Detailed Description

Console implementation for VGA.

This console is a output only console for VGA. It implements an ANSI ESC capable output device.

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Member Enumeration Documentation

anonymous enum [private]

Enumeration values: MAX_ANSI_ESC_ARGS

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Constructor & Destructor Documentation

Vga_console::Vga_console (  Address  base, unsigned  width = 80, unsigned  height = 25, bool  light_white = false, bool  use_color = false )

Create a new instance of a VGA console. Parameters: base  the base address of the VGA memory. width  the width of the screen. height  the height of the screen. light_white  if set to true the color grey is replaced with white. use_color  says whether ANSI ESC colors should be passed (=true) to the video memory or not (=false).

Vga_console::~Vga_console (   )

dtor.

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Member Function Documentation

void Vga_console::ansi_attrib (  int  a  )  [inline, private]

void Vga_console::ansi_esc_write (  char const *  str, size_t  len, unsigned &  i )  [private]

void Vga_console::blink_cursor (  unsigned  x, unsigned  y )  [private]

Set blinking screen cursor.

void Vga_console::clear (   )

Clear the screen,.

void Vga_console::esc_write (  char const *  str, size_t  len, unsigned &  i )  [private]

Mword Vga_console::get_attributes (   )  const [virtual]

Console attributes. Reimplemented from Console.

int Vga_console::getchar (  bool  blocking = true  )  [virtual]

Empty implementation. Reimplemented from Console.

bool const Vga_console::is_working (   )  [inline]

void Vga_console::normal_write (  char const *  str, size_t  len, unsigned &  i )  [private]

void Vga_console::scroll (  unsigned  n  )

Scroll the screen n lines up. Parameters: n  number of lines to scroll.

int Vga_console::seq_1 (  char const *  , size_t  , unsigned &  )  [inline, private]

int Vga_console::seq_5 (  char const *  , size_t  , unsigned &  )  [inline, private]

int Vga_console::seq_6 (  char const *  str, size_t  len, unsigned &  pos )  [inline, private]

void Vga_console::video_base (  Address  base  )

Set the base address of the VGA memory. Parameters: base  the base address of the VGA memory.

Address Vga_console::video_base (   )  const

Get the base address for the VGA memory. Returns: The base address of the VGA memory.

int Vga_console::write (  char const *  str, size_t  len )  [virtual]

Output method. Reimplemented from Console.

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Member Data Documentation

unsigned Vga_console::_attribute [private]

Address Vga_console::_crtc [private]

unsigned Vga_console::_height [private]

bool Vga_console::_is_working [private]

bool const Vga_console::_light_white [private]

bool const Vga_console::_use_color [private]

VChar* Vga_console::_video_base [private]

unsigned Vga_console::_width [private]

unsigned Vga_console::_x [private]

unsigned Vga_console::_y [private]

int Vga_console::ansi_esc_args[MAX_ANSI_ESC_ARGS] [private]

unsigned Vga_console::num_ansi_esc_args [private]

struct Vga_console::VChar Vga_console::packed [private]

Type of a on screen character.

void(Vga_console::* Vga_console::wr)(char const *, size_t, unsigned &) [private]

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

• vga_console.h
• vga_console.cc
• vga_console_i.h

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