Vga Class Reference

#include <Vga.h>

Inheritance diagram for Vga:

Collaboration diagram for Vga:

Public Member Functions
virtual bool	setLargestTextMode ()=0
virtual size_t	getNumCols ()=0
virtual size_t	getNumRows ()=0
virtual void	pokeBuffer (uint8_t *pBuffer, size_t nBufLen)=0
virtual void	peekBuffer (uint8_t *pBuffer, size_t nBufLen)=0
virtual void	moveCursor (size_t nX, size_t nY)=0
virtual void	flush ()
virtual void	enterPanicMode ()
virtual bool	setFramebuffer (Framebuffer *)
virtual	operator uint16_t * () const =0

Detailed Description

Vga device abstraction.

Definition at line 30 of file include/pedigree/kernel/machine/Vga.h.

Member Function Documentation

enterPanicMode()

virtual void Vga::enterPanicMode ( )

inlinevirtual

Definition at line 84 of file include/pedigree/kernel/machine/Vga.h.

flush()

virtual void Vga::flush ( )

inlinevirtual

Definition at line 80 of file include/pedigree/kernel/machine/Vga.h.

getNumCols()

virtual size_t Vga::getNumCols ( )

pure virtual

Returns

The number of columns in the current mode.

Implemented in HostedVga, and X86Vga.

Referenced by Machine::displayShutdownMessage(), TextIO::flip(), BootIO::initialise(), and TextIO::initialise().

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getNumRows()

virtual size_t Vga::getNumRows ( )

pure virtual

Returns

The number of rows in the current mode.

Implemented in HostedVga, and X86Vga.

Referenced by Machine::displayShutdownMessage(), TextIO::flip(), BootIO::initialise(), and TextIO::initialise().

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moveCursor()

virtual void Vga::moveCursor ( size_t  nX, size_t  nY  )

pure virtual

Moves the cursor to the position specified by the parameters.

Parameters

nX	The column to move to.
nY	The row to move to.

Implemented in HostedVga, and X86Vga.

Referenced by Machine::displayShutdownMessage(), TextIO::markPrimary(), LocalIO::moveCursor(), and TextIO::writeStr().

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peekBuffer()

virtual void Vga::peekBuffer ( uint8_t *  pBuffer, size_t  nBufLen  )

pure virtual

Copies the current framebuffer into the given buffer.

The buffer is assumed to be in the correct format for directly copying from video memory. This will obviously depend on the current mode (text/graphical) as well as resolution and bits per pixel (graphics mode only).

Parameters

A	pointer to the buffer.
The	length of pBuffer.

Implemented in HostedVga, and X86Vga.

pokeBuffer()

virtual void Vga::pokeBuffer ( uint8_t *  pBuffer, size_t  nBufLen  )

pure virtual

Copies the given buffer into video memory, replacing the current framebuffer.

The buffer is assumed to be in the correct format for directly copying into video memory. This will obviously depend on the current mode (text/graphical) as well as resolution and bits per pixel (graphics mode only).

Parameters

A	pointer to the buffer to swap into video memory.
The	length of pBuffer.

Implemented in HostedVga, and X86Vga.

setFramebuffer()

virtual bool Vga::setFramebuffer ( Framebuffer *  )

inlinevirtual

Definition at line 88 of file include/pedigree/kernel/machine/Vga.h.

setLargestTextMode()

virtual bool Vga::setLargestTextMode ( )

pure virtual

Sets the largest possible text mode.

Returns

True on success, false on failure.

Implemented in HostedVga, and X86Vga.

Referenced by FramebufferFile::command(), Machine::displayShutdownMessage(), BootIO::initialise(), and TextIO::initialise().

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

• include/pedigree/kernel/machine/Vga.h
• Vga.cc