Represents the VGA 4 colors bitmapped controller. More...

#include <vga4controller.h>

Inheritance diagram for VGA4Controller:

Public Member Functions
void	begin ()
	This is the 64 colors (8 GPIOs) initializer using default pinout. More...

void	begin (gpio_num_t red1GPIO, gpio_num_t red0GPIO, gpio_num_t green1GPIO, gpio_num_t green0GPIO, gpio_num_t blue1GPIO, gpio_num_t blue0GPIO, gpio_num_t HSyncGPIO, gpio_num_t VSyncGPIO)
	This is the 64 colors (8 GPIOs) initializer. More...

void	begin (gpio_num_t redGPIO, gpio_num_t greenGPIO, gpio_num_t blueGPIO, gpio_num_t HSyncGPIO, gpio_num_t VSyncGPIO)
	This is the 8 colors (5 GPIOs) initializer. More...

virtual int	colorsCount ()
	Determines number of colors this display can provide. More...

DisplayControllerType	controllerType ()
	Determines the display controller type. More...

uint8_t	createRawPixel (RGB222 rgb)
	Creates a raw pixel to use with VGAController.setRawPixel. More...

void	enableBackgroundPrimitiveExecution (bool value)
	Enables or disables drawings inside vertical retracing time. More...

void	enableBackgroundPrimitiveTimeout (bool value)
	Enables or disables execution time limitation inside vertical retracing interrupt. More...

uint8_t	getBitsPerChannel ()
	Gets number of bits allocated for each channel. More...

uint8_t *	getScanline (int y)
	Gets a raw scanline pointer. More...

int	getScreenHeight ()
	Determines the screen height in pixels. More...

int	getScreenWidth ()
	Determines the screen width in pixels. More...

int	getViewPortCol ()
	Determines horizontal position of the viewport. More...

int	getViewPortHeight ()
	Determines vertical size of the viewport. More...

int	getViewPortRow ()
	Determines vertical position of the viewport. More...

int	getViewPortWidth ()
	Determines horizontal size of the viewport. More...

bool	isDoubleBuffered ()
	Determines whether BitmappedDisplayController is on double buffered mode. More...

void	moveScreen (int offsetX, int offsetY)
	Moves screen by specified horizontal and vertical offset. More...

NativePixelFormat	nativePixelFormat ()
	Represents the native pixel format used by this display. More...

void	processPrimitives ()
	Draws immediately all primitives in the queue. More...

void	refreshSprites ()
	Forces the sprites to be updated. More...

void	removeSprites ()
	Empties the list of active sprites. More...

void	setMouseCursor (Cursor *cursor)
	Sets mouse cursor and make it visible. More...

void	setMouseCursor (CursorName cursorName)
	Sets mouse cursor from a set of predefined cursors. More...

void	setMouseCursorPos (int X, int Y)
	Sets mouse cursor position. More...

void	setPaletteItem (int index, RGB888 const &color)
	Determines color of specified palette item. More...

void	setProcessPrimitivesOnBlank (bool value)
	Determines the maximum time allowed to process primitives. More...

void	setResolution (char const *modeline, int viewPortWidth=-1, int viewPortHeight=-1, bool doubleBuffered=false)
	Sets current resolution using linux-like modeline. More...

template<typename T >
void	setSprites (T *sprites, int count)
	Sets the list of active sprites. More...

void	shrinkScreen (int shrinkX, int shrinkY)
	Reduces or expands screen size by the specified horizontal and vertical offset. More...

void	suspendBackgroundPrimitiveExecution ()
	Suspends drawings. More...

Static Public Member Functions
static VGA4Controller *	instance ()
	Returns the singleton instance of VGA4Controller class. More...

Static Public Attributes
static int	queueSize = 1024
	Size of display controller primitives queue. More...

Detailed Description

Represents the VGA 4 colors bitmapped controller.

This VGA controller allows just 4 colors, but requires less (1/4) RAM than VGAController, at the same resolution. Each pixel is represented by 2 bits, which is an index to a palette of 4 colors. Each byte of the frame buffer contains four pixels. For example, a frame buffer of 640x480 requires about 75K of RAM.

VGA4Controller output consumes up to 11% of one CPU core (measured at 640x480x60Hz). Anyway this allows to have more RAM free for your application.

This example initializes VGA Controller with 64 colors (16 visible at the same time) at 640x480:

fabgl::VGA4Controller displayController;
// the default assigns GPIO22 and GPIO21 to Red, GPIO19 and GPIO18 to Green, GPIO5 and GPIO4 to Blue, GPIO23 to HSync and GPIO15 to VSync
displayController.begin();
displayController.setResolution(VGA_640x480_60Hz);

Definition at line 80 of file vga4controller.h.

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

Public Member Functions

Static Public Member Functions

Static Public Attributes

Detailed Description