Framebuffer< COLORDEPTH, OFFSET_RED, OFFSET_GREEN, OFFSET_BLUE, BITS_RED, BITS_GREEN, BITS_BLUE > Class Template Reference

Implementation of primitive operations on a memory area used as framebuffer. More...

#include <framebuffer.h>

Inheritance diagram for Framebuffer< COLORDEPTH, OFFSET_RED, OFFSET_GREEN, OFFSET_BLUE, BITS_RED, BITS_GREEN, BITS_BLUE >:

Classes
union	Pixel
	Pixel (colored) More...
class	PixelComponent
	Pixel component. More...

Protected Member Functions
void	init (const unsigned width, const unsigned height, const unsigned pitch)
	Initialize screen dimensions.
void	buffer (void *lfb)
	Set the video memory address.
void	clear ()
	Clear all pixel of the current back buffer (set full screen to black)
Pixel *	get (const unsigned x, const unsigned y) const
	Get pixel at position.
Pixel *	get (const Point &p) const
	Get pixel at position.
template<enum SpriteColorMode COLOR, bool ALPHA, unsigned BITS>
void	set (const unsigned x, const unsigned y, const SpritePixel< COLOR, ALPHA, BITS > &color)
	Assign color to a pixel at a given position.
template<enum SpriteColorMode COLOR, bool ALPHA, unsigned BITS>
void	set (const Point &p, const SpritePixel< COLOR, ALPHA, BITS > &color)
	Assign color to a pixel at a given position.

Protected Attributes
unsigned	screen_width
	Visible width of the screen.
unsigned	screen_height
	Visible height of the screen.

Private Attributes
uintptr_t	framebuffer
	Start address of the linear framebuffer.
unsigned	pitch
	Internal width of the screen.

Detailed Description

template<unsigned char COLORDEPTH, unsigned char OFFSET_RED, unsigned char OFFSET_GREEN, unsigned char OFFSET_BLUE, unsigned char BITS_RED, unsigned char BITS_GREEN, unsigned char BITS_BLUE>
class Framebuffer< COLORDEPTH, OFFSET_RED, OFFSET_GREEN, OFFSET_BLUE, BITS_RED, BITS_GREEN, BITS_BLUE >

Implementation of primitive operations on a memory area used as framebuffer.

The implementation as template class allows the compiler to heavily optimize the bit operations depending on the video mode.

Template Parameters

COLORDEPTH	color depth of video mode
OFFSET_RED	Bit position of red color mask in video mode
OFFSET_GREEN	Bit position of green color mask in video mode
OFFSET_BLUE	Bit position of blue color mask in video mode
BITS_RED	Size of red color mask in video mode
BITS_GREEN	Size of green color mask in video mode
BITS_BLUE	Size of blue color mask in video mode

Member Function Documentation

buffer()

template<unsigned char COLORDEPTH, unsigned char OFFSET_RED, unsigned char OFFSET_GREEN, unsigned char OFFSET_BLUE, unsigned char BITS_RED, unsigned char BITS_GREEN, unsigned char BITS_BLUE>

void Framebuffer< COLORDEPTH, OFFSET_RED, OFFSET_GREEN, OFFSET_BLUE, BITS_RED, BITS_GREEN, BITS_BLUE >::buffer ( void *  lfb )

inlineprotected

Set the video memory address.

Parameters

lfb	pointer to the linear framebuffer (lfb)

get() [1/2]

template<unsigned char COLORDEPTH, unsigned char OFFSET_RED, unsigned char OFFSET_GREEN, unsigned char OFFSET_BLUE, unsigned char BITS_RED, unsigned char BITS_GREEN, unsigned char BITS_BLUE>

Pixel * Framebuffer< COLORDEPTH, OFFSET_RED, OFFSET_GREEN, OFFSET_BLUE, BITS_RED, BITS_GREEN, BITS_BLUE >::get ( const Point &  p ) const

inlineprotected

Get pixel at position.

Parameters

p	Coordinate of position

Returns

Pointer to pixel

get() [2/2]

template<unsigned char COLORDEPTH, unsigned char OFFSET_RED, unsigned char OFFSET_GREEN, unsigned char OFFSET_BLUE, unsigned char BITS_RED, unsigned char BITS_GREEN, unsigned char BITS_BLUE>

Pixel * Framebuffer< COLORDEPTH, OFFSET_RED, OFFSET_GREEN, OFFSET_BLUE, BITS_RED, BITS_GREEN, BITS_BLUE >::get ( const unsigned  x, const unsigned  y  ) const

inlineprotected

Get pixel at position.

Parameters

x	X position
y	Y position

Returns

Pointer to pixel

init()

template<unsigned char COLORDEPTH, unsigned char OFFSET_RED, unsigned char OFFSET_GREEN, unsigned char OFFSET_BLUE, unsigned char BITS_RED, unsigned char BITS_GREEN, unsigned char BITS_BLUE>

void Framebuffer< COLORDEPTH, OFFSET_RED, OFFSET_GREEN, OFFSET_BLUE, BITS_RED, BITS_GREEN, BITS_BLUE >::init ( const unsigned  width, const unsigned  height, const unsigned  pitch  )

inlineprotected

Initialize screen dimensions.

Parameters

width	visible width of graphics screen
height	visible height of graphics screen
pitch	width of graphics screen (including invisible part, has to be at least width)

set() [1/2]

template<unsigned char COLORDEPTH, unsigned char OFFSET_RED, unsigned char OFFSET_GREEN, unsigned char OFFSET_BLUE, unsigned char BITS_RED, unsigned char BITS_GREEN, unsigned char BITS_BLUE>

template<enum SpriteColorMode COLOR, bool ALPHA, unsigned BITS>

void Framebuffer< COLORDEPTH, OFFSET_RED, OFFSET_GREEN, OFFSET_BLUE, BITS_RED, BITS_GREEN, BITS_BLUE >::set ( const Point &  p, const SpritePixel< COLOR, ALPHA, BITS > &  color  )

inlineprotected

Assign color to a pixel at a given position.

Template Parameters

COLOR	color or greyscale?
ALPHA	with transparency?
BITS	Size of mask

Parameters

p	Coordinate of position
color	color to assign

set() [2/2]

template<unsigned char COLORDEPTH, unsigned char OFFSET_RED, unsigned char OFFSET_GREEN, unsigned char OFFSET_BLUE, unsigned char BITS_RED, unsigned char BITS_GREEN, unsigned char BITS_BLUE>

template<enum SpriteColorMode COLOR, bool ALPHA, unsigned BITS>

void Framebuffer< COLORDEPTH, OFFSET_RED, OFFSET_GREEN, OFFSET_BLUE, BITS_RED, BITS_GREEN, BITS_BLUE >::set ( const unsigned  x, const unsigned  y, const SpritePixel< COLOR, ALPHA, BITS > &  color  )

inlineprotected

Assign color to a pixel at a given position.

Template Parameters

COLOR	color or greyscale?
ALPHA	with transparency?
BITS	Size of mask

Parameters

x	X position
y	Y position
color	color to assign

Member Data Documentation

pitch

template<unsigned char COLORDEPTH, unsigned char OFFSET_RED, unsigned char OFFSET_GREEN, unsigned char OFFSET_BLUE, unsigned char BITS_RED, unsigned char BITS_GREEN, unsigned char BITS_BLUE>

unsigned Framebuffer< COLORDEPTH, OFFSET_RED, OFFSET_GREEN, OFFSET_BLUE, BITS_RED, BITS_GREEN, BITS_BLUE >::pitch

private

Internal width of the screen.

At least the visible width of the screen, depends on the hardware but required for calculating the rows

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

• graphics/framebuffer.h