#include "simpletools.h"

Data Structures
struct	screen_st

Macros
#define	SMALL 1

#define	MEDIUM 2

#define	LARGE 3

#define	FONT_SANS 0

#define	FONT_SERIF 1

#define	FONT_SCRIPT 2

#define	FONT_BUBBLE 3

#define	INTF_SPI_NO_BUFFER 0b00

#define	INTF_SPI_WITH_BUFFER 0b10

#define	INTF_I2C_NO_BUFFER 0b01

#define	INTF_I2C_WITH_BUFFER 0b11

#define	gfx_swap(a, b) (((a) ^= (b)), ((b) ^= (a)), ((a) ^= (b)))

#define	absv(x) ((x)<0 ? -(x) : (x))

#define	HEX -16

#define	OCT -8

#define	BIN -2

#define	DEC -10

Typedefs
typedef struct screen_st	screen_t

typedef screen_t	screen

Functions
void	clearDisplay (screen_t *dev)
	Clears (sets to the native background color of the screen, usually black) the entire screen. More...

void	updateDisplay (screen_t *dev)
	Updates the display by writing the image buffer to it. Not necessary for screens that have their own image buffers. More...

void	resetDisplay (screen_t *dev)
	Resets the display. More...

void	drawPixel (screen_t *dev, int x, int y, int color)
	Draws a single pixel in the specified color. More...

void	drawFastHLine (screen_t *dev, int x, int y, int w, int color)
	Draws a horizontal line in the specified color. More...

void	drawFastVLine (screen_t *dev, int x, int y, int h, int color)
	Draws a vertical line in the specified color. More...

void	drawLine (screen_t *dev, int x0, int y0, int x1, int y1, int color)
	Draws a line in the specified color. More...

void	drawCircle (screen_t *dev, int x0, int y0, int r, int color)
	Draws a circle in the specified color. More...

void	drawCircleHelper (screen_t *dev, int x0, int y0, int r, char cornername, int color)
	Helper function used to help draw circles and rectangles with rounded corners. More...

void	fillCircle (screen_t *dev, int x0, int y0, int r, int color)
	Draws a filled circle in the specified color. More...

void	fillCircleHelper (screen_t *dev, int x0, int y0, int r, char cornername, int delta, int color)
	Helper function used to draw filled circles and rectangles with rounded corners. More...

void	drawRect (screen_t *dev, int x, int y, int w, int h, int color)
	Draws a rectangle in the specified color. More...

void	fillRect (screen_t *dev, int x, int y, int w, int h, int color)
	Draws a filled rectangle in the specified color. More...

void	drawRoundRect (screen_t *dev, int x, int y, int w, int h, int r, int color)
	Draws a rectangle with rounded corners in the specified color. More...

void	fillRoundRect (screen_t *dev, int x, int y, int w, int h, int r, int color)
	Draws a filled rectangle with rounded corners in the specified color. More...

void	drawTriangle (screen_t *dev, int x0, int y0, int x1, int y1, int x2, int y2, int color)
	Draws a triangle with in the specified color. More...

void	fillTriangle (screen_t *dev, int x0, int y0, int x1, int y1, int x2, int y2, int color)
	Draws a filled triangle with in the specified color. More...

void	drawCopy (screen_t *dev, int x, int y, int w, int h, int x1, int y1)
	Copies a rectagle and draws it at another location on the screen. More...

void	setTextSize (screen_t *dev, char s)
	Sets the size of the font to be used. Range is from 1 to 3. Size (1) is 5x7 (6x8 spacing) pixels, size (2) is 11x15 (12x16 spacing) pixels and size (3) is 15x23 (16x24 spacing) pixels. More...

void	setTextFont (screen_t *dev, char f)
	Sets the font face to be used. Range is from 0 to 3. More...

void	setTextColor (screen_t *dev, int color)
	Sets the color of the font and the color of the background (highlighting) to be used. Setting the text color and text background to the same color will make the background color transparent. More...

void	setBgColor (screen_t *dev, int color)
	Sets the color of the font and the color of the background (highlighting) to be used. Setting the text color and text background to the same color will make the background color transparent. More...

void	setTextWrap (screen_t *dev, char w)
	Toggles automatic wrapping of text printed to the screen. More...

void	setCursor (screen_t *dev, int x, int y, char size)
	Sets the cursor position based on the size parameter. More...

int	drawPrint (screen_t dev, const char fmt,...)
	Print format "..." args to the screen. The output is limited to 128 bytes. More...

void	drawNumber (screen_t *dev, float d, int r)
	Prints a number to the screen starting at the cursor position. Output is limited to 64 bytes. More...

void	drawText (screen_t dev, char myString)
	Prints a string of text to the screen starting at the cursor position. Output is limited to 64 bytes. More...

void	drawChar (screen_t *dev, char c)
	Prints single ASCII-encoded characters to the screen. Characters 32 (space) to 126 (~) are rendered. All other characters are rendered as a box. More...

int	getCursorX (screen_t *dev)
	Returns the current horizontal position of the cursor, measured from the left side of the screen in pixels. More...

int	getCursorY (screen_t *dev)
	Returns the current vertical position of the cursor, measured from the top of the screen in pixels. More...

void	setDisplayRotation (screen_t *dev, char r)
	Sets the screen's orientation. More...

char	getDisplayRotation (screen_t *dev)
	Returns the screen's orientation. More...

int	getDisplayWidth (screen_t *dev)
	Returns the width of the display in pixels with screen rotation taken into account. More...

int	getDisplayHeight (screen_t *dev)
	Returns the height of the display in pixels with screen rotation taken into account. More...

void	loadFonts (screen_t dev, i2c eeBus)
	Internal function used to load the EEPROM addresses of the bitmapped fonts to the device's structure. This function is called by the init function in the display's library. It can be called at any time to point to fonts stored in an EEPROM attached to a different i2c bus. More...

void	drawCharSmall (screen_t *dev, unsigned char c)
	Low-level helper function for printing single characters to the screen in the small (5x7) font. More...

void	drawCharMedium (screen_t *dev, unsigned char c)
	Low-level helper function for printing single characters to the screen in the medium (11x15) font. More...

void	drawCharLarge (screen_t *dev, unsigned char c)
	Low-level helper function for printing single characters to the screen in the large (17x23) font. More...

void	invertDisplay (screen_t *dev, char i)
	Toggles the invert/normal display modes for the display. Depending on the display type it may only invert existing drawings, or it may invert both existing and colors drawn when inversion is set. More...

void	sleepWakeDisplay (screen_t *dev, char i)
	Toggle the display's sleep/wake mode. Not supported by all displays. More...

void	scrollDisplay (screen_t *dev, int h, int v)
	Set the display's vertical or hrizontal scrolling functions. Not supported by all displays, and different display types behave differently. More...

char	isInverted (screen_t *dev)
	Returns the status of the screen's colors - normal or inverted. More...

char	isAsleep (screen_t *dev)
	Returns whether the screen is currently in a sleep mode or awake. More...

unsigned char	getScrollVertical (screen_t *dev)
	Returns a value representing the status or speed of the display's vertical scroll. More...

unsigned char	getScrollHorizontal (screen_t *dev)
	Returns a value representing the status or speed of the display's horizontal scroll. More...

void	drawBitmap (screen_t dev, char imgdir, int x, int y)
	Draw an image (bitmap) at the specified (x,y) position. Requires an SD card to be mounted. More...

Macro Definition Documentation

◆ absv

#define absv ( x ) ((x)<0 ? -(x) : (x))

◆ BIN

#define BIN -2

◆ DEC

#define DEC -10

◆ FONT_BUBBLE

#define FONT_BUBBLE 3

◆ FONT_SANS

#define FONT_SANS 0

◆ FONT_SCRIPT

#define FONT_SCRIPT 2

◆ FONT_SERIF

#define FONT_SERIF 1

◆ gfx_swap

#define gfx_swap	(	a,
		b
	)	(((a) ^= (b)), ((b) ^= (a)), ((a) ^= (b)))

◆ HEX

#define HEX -16

◆ INTF_I2C_NO_BUFFER

#define INTF_I2C_NO_BUFFER 0b01

◆ INTF_I2C_WITH_BUFFER

#define INTF_I2C_WITH_BUFFER 0b11

◆ INTF_SPI_NO_BUFFER

#define INTF_SPI_NO_BUFFER 0b00

◆ INTF_SPI_WITH_BUFFER

#define INTF_SPI_WITH_BUFFER 0b10

◆ LARGE

#define LARGE 3

◆ MEDIUM

#define MEDIUM 2

◆ OCT

#define OCT -8

◆ SMALL

#define SMALL 1

Typedef Documentation

◆ screen

typedef screen_t screen

◆ screen_t

typedef struct screen_st screen_t

Function Documentation

◆ clearDisplay()

void clearDisplay ( screen_t * dev )

Clears (sets to the native background color of the screen, usually black) the entire screen.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.

◆ drawBitmap()

void drawBitmap	(	screen_t *	dev,
		char *	imgdir,
		int	x,
		int	y
	)

Draw an image (bitmap) at the specified (x,y) position.
Requires an SD card to be mounted.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
imgdir	String of the filename of the bitmap stored on the SD card.
x	Horizontal coordinate of the top-left corner of where to draw the image.
y	Vertical coordinate of the top-left corner of where to draw the image.

◆ drawChar()

void drawChar	(	screen_t *	dev,
		char	c
	)

Prints single ASCII-encoded characters to the screen. Characters 32 (space) to 126 (~) are rendered. All other characters are rendered as a box.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
c	ASCII-encoded character to draw.

◆ drawCharLarge()

void drawCharLarge	(	screen_t *	dev,
		unsigned char	c
	)

Low-level helper function for printing single characters to the screen in the large (17x23) font.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
c	ASCII-encoded character to draw.

◆ drawCharMedium()

void drawCharMedium	(	screen_t *	dev,
		unsigned char	c
	)

Low-level helper function for printing single characters to the screen in the medium (11x15) font.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
c	ASCII-encoded character to draw.

◆ drawCharSmall()

void drawCharSmall	(	screen_t *	dev,
		unsigned char	c
	)

Low-level helper function for printing single characters to the screen in the small (5x7) font.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
c	ASCII-encoded character to draw.

◆ drawCircle()

void drawCircle	(	screen_t *	dev,
		int	x0,
		int	y0,
		int	r,
		int	color
	)

Draws a circle in the specified color.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x0	Horizontal coordinate of the center of the circle, counted from the left side of the screen.
y0	Vertical coordinate of the center of the circle, counted down from the top of the screen.
r	Radius of the circle.
color	Color of the shape, in the format native to the display.

◆ drawCircleHelper()

void drawCircleHelper	(	screen_t *	dev,
		int	x0,
		int	y0,
		int	r,
		char	cornername,
		int	color
	)

Helper function used to help draw circles and rectangles with rounded corners.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x0	Horizontal coordinate of the center of the arc, counted from the left side of the screen.
y0	Vertical coordinate of the center of the arc, counted down from the top of the screen.
r	Radius of the arc.
cornername	Which corner (arc) to draw
color	Color of the shape, in the format native to the display.

◆ drawCopy()

void drawCopy	(	screen_t *	dev,
		int	x,
		int	y,
		int	w,
		int	h,
		int	x1,
		int	y1
	)

Copies a rectagle and draws it at another location on the screen.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x	Horizontal coordinate of the top-left corner of the rectangle to be copied.
y	Vertical coordinate of the top-left corner of the rectagle to be copied.
w	Width of the rectagle to be copied.
h	Height of the rectagle to be copied.
x1	Horizontal coordinate of the location to paste the copied rectagle to.
y1	Vertical coordinate of the location to paste the copied rectagle to.

◆ drawFastHLine()

void drawFastHLine	(	screen_t *	dev,
		int	x,
		int	y,
		int	w,
		int	color
	)

Draws a horizontal line in the specified color.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x	Starting horizontal coordinate of the line, counted from the left side of the screen.
y	Starting vertical coordinate of the line, counted down from the top of the screen.
w	Length of the line.
color	Color of the line, in the format native to the display.

◆ drawFastVLine()

void drawFastVLine	(	screen_t *	dev,
		int	x,
		int	y,
		int	h,
		int	color
	)

Draws a vertical line in the specified color.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x	Starting horizontal coordinate of the line, counted from the left side of the screen.
y	Starting vertical coordinate of the line, counted down from the top of the screen.
h	Length of the line.
color	Color of the line, in the format native to the display.

◆ drawLine()

void drawLine	(	screen_t *	dev,
		int	x0,
		int	y0,
		int	x1,
		int	y1,
		int	color
	)

Draws a line in the specified color.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x0	Starting horizontal coordinate of the line, counted from the left side of the screen.
y0	Starting vertical coordinate of the line, counted down from the top of the screen.
x1	Ending horizontal coordinate of the line.
y1	Ending vertical coordinate of the line.
color	Color of the shape, in the format native to the display.

◆ drawNumber()

void drawNumber	(	screen_t *	dev,
		float	d,
		int	r
	)

Prints a number to the screen starting at the cursor position. Output is limited to 64 bytes.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
d	Number to be printed to the screen. The number can be either a floating point decimal or an integer.
r	The number base to display the number in (for integers); HEX, BIN, OCT, and DEC are acceptable values. or the number of decimals to display following the decimal point (for floating point numbers). Negative numbers in bases other than DEC will display "Err".

◆ drawPixel()

void drawPixel	(	screen_t *	dev,
		int	x,
		int	y,
		int	color
	)

Draws a single pixel in the specified color.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x	Horizontal coordinate of the pixel, counted from the left side of the screen.
y	Vertical coordinate of the pixel, counted down from the top of the screen.
color	Color of the pixel, in the format native to the display.

◆ drawPrint()

int drawPrint	(	screen_t *	dev,
		const char *	fmt,
			...
	)

Print format "..." args to the screen. The output is limited to 128 bytes.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
fmt	Formatted string to be printed to the display.

◆ drawRect()

void drawRect	(	screen_t *	dev,
		int	x,
		int	y,
		int	w,
		int	h,
		int	color
	)

Draws a rectangle in the specified color.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x	Starting horizontal coordinate of the rectangle, counted from the left side of the screen.
y	Starting vertical coordinate of the rectangle, counted down from the top of the screen.
w	Width of the rectangle.
h	Height of the rectangle.
color	Color of the shape, in the format native to the display.

◆ drawRoundRect()

void drawRoundRect	(	screen_t *	dev,
		int	x,
		int	y,
		int	w,
		int	h,
		int	r,
		int	color
	)

Draws a rectangle with rounded corners in the specified color.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x	Starting horizontal coordinate of the rectangle, counted from the left side of the screen.
y	Starting vertical coordinate of the rectangle, counted down from the top of the screen.
w	Width of the rectangle.
h	Height of the rectangle.
r	Radius of the rounded corners.
color	Color of the shape, in the format native to the display.

◆ drawText()

void drawText	(	screen_t *	dev,
		char *	myString
	)

Prints a string of text to the screen starting at the cursor position. Output is limited to 64 bytes.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
*myString	Text to display on the screen.

◆ drawTriangle()

void drawTriangle	(	screen_t *	dev,
		int	x0,
		int	y0,
		int	x1,
		int	y1,
		int	x2,
		int	y2,
		int	color
	)

Draws a triangle with in the specified color.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x0	Horizontal coordinate of the first vertex (corner) of the triangle, counted from the left side of the screen.
y0	Vertical coordinate of the first vertex (corner) of the triangle, counted down from the top of the screen.
x1	Horizontal coordinate of the second vertex of the triangle.
y1	Vertical coordinate of the first vertex of the triangle.
x2	Horizontal coordinate of the third vertex of the triangle.
y2	Vertical coordinate of the third vertex of the triangle.
color	Color of the shape, in the format native to the display.

◆ fillCircle()

void fillCircle	(	screen_t *	dev,
		int	x0,
		int	y0,
		int	r,
		int	color
	)

Draws a filled circle in the specified color.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x0	Horizontal coordinate of the center of the circle, counted from the left side of the screen.
y0	Vertical coordinate of the center of the circle, counted down from the top of the screen.
r	Radius of the circle.
color	Color of the shape, in the format native to the display.

◆ fillCircleHelper()

void fillCircleHelper	(	screen_t *	dev,
		int	x0,
		int	y0,
		int	r,
		char	cornername,
		int	delta,
		int	color
	)

Helper function used to draw filled circles and rectangles with rounded corners.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x0	Horizontal coordinate of the center of the arc, counted from the left side of the screen.
y0	Vertical coordinate of the center of the arc, counted down from the top of the screen.
r	Radius of the arc.
cornername	Which corner (arc) to draw
delta	Offest from the center line (space between quarter circles) used for drawing rounded rectagles
color	Color of the shape, in the format native to the display.

◆ fillRect()

void fillRect	(	screen_t *	dev,
		int	x,
		int	y,
		int	w,
		int	h,
		int	color
	)

Draws a filled rectangle in the specified color.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x	Starting horizontal coordinate of the rectangle, counted from the left side of the screen.
y	Starting vertical coordinate of the rectangle, counted down from the top of the screen.
w	Width of the rectangle.
h	Height of the rectangle.
color	Color of the shape, in the format native to the display.

◆ fillRoundRect()

void fillRoundRect	(	screen_t *	dev,
		int	x,
		int	y,
		int	w,
		int	h,
		int	r,
		int	color
	)

Draws a filled rectangle with rounded corners in the specified color.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x	Starting horizontal coordinate of the rectangle, counted from the left side of the screen.
y	Starting vertical coordinate of the rectangle, counted down from the top of the screen.
w	Width of the rectangle.
h	Height of the rectangle.
r	Radius of the rounded corners.
color	Color of the shape, in the format native to the display.

◆ fillTriangle()

void fillTriangle	(	screen_t *	dev,
		int	x0,
		int	y0,
		int	x1,
		int	y1,
		int	x2,
		int	y2,
		int	color
	)

Draws a filled triangle with in the specified color.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x0	Horizontal coordinate of the first vertex (corner) of the triangle, counted from the left side of the screen.
y0	Vertical coordinate of the first vertex (corner) of the triangle, counted down from the top of the screen.
x1	Horizontal coordinate of the second vertex of the triangle.
y1	Vertical coordinate of the first vertex of the triangle.
x2	Horizontal coordinate of the third vertex of the triangle.
y2	Vertical coordinate of the third vertex of the triangle.
color	Color of the shape, in the format native to the display.

◆ getCursorX()

int getCursorX ( screen_t * dev )

Returns the current horizontal position of the cursor, measured from the left side of the screen in pixels.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.

Returns: the horizontal position of the cursor in pixels.

◆ getCursorY()

int getCursorY ( screen_t * dev )

Returns the current vertical position of the cursor, measured from the top of the screen in pixels.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.

Returns: the vertical position of the cursor in pixels.

◆ getDisplayHeight()

int getDisplayHeight ( screen_t * dev )

Returns the height of the display in pixels with screen rotation taken into account.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.

◆ getDisplayRotation()

char getDisplayRotation ( screen_t * dev )

Returns the screen's orientation.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.

Returns: A number representing the screen's orientation. (0) means pixels are drawn to the screen is at it's native orientation, (1) means pixels are drawn rotated 90 degrees clockwise, (2) means pixels are drawn upside-down - 180 degrees rotated, and (3) means pixels are drawn rotated 270 degrees clockwise.

◆ getDisplayWidth()

int getDisplayWidth ( screen_t * dev )

Returns the width of the display in pixels with screen rotation taken into account.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.

◆ getScrollHorizontal()

unsigned char getScrollHorizontal ( screen_t * dev )

Returns a value representing the status or speed of the display's horizontal scroll.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.

Returns: A value representing the horizontal scrolling velocity (or 1 if the screen only supports a single scrolling speed).

◆ getScrollVertical()

unsigned char getScrollVertical ( screen_t * dev )

Returns a value representing the status or speed of the display's vertical scroll.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.

Returns: A value representing the vertical scrolling velocity (or 1 if the screen only supports a single scrolling speed).

◆ invertDisplay()

void invertDisplay	(	screen_t *	dev,
		char	i
	)

Toggles the invert/normal display modes for the display. Depending on the display type it may only invert existing drawings, or it may invert both existing and colors drawn when inversion is set.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
i	Set to 0 for normal and 1 for inverted.

◆ isAsleep()

char isAsleep ( screen_t * dev )

Returns whether the screen is currently in a sleep mode or awake.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.

Returns: A value of 1 if the screenis asleep, and 0 if the screen is awake

◆ isInverted()

char isInverted ( screen_t * dev )

Returns the status of the screen's colors - normal or inverted.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.

Returns: A value of 1 if the screen's colors are inverted, and 0 if the screen's colors are normal (not-inverted).

◆ loadFonts()

void loadFonts	(	screen_t *	dev,
		i2c *	eeBus
	)

Internal function used to load the EEPROM addresses of the bitmapped fonts to the device's structure. This function is called by the init function in the display's library. It can be called at any time to point to fonts stored in an EEPROM attached to a different i2c bus.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
eeBus	Pointer to the i2c bus where the EEPROM containing the font bitmaps is connected.

◆ resetDisplay()

void resetDisplay ( screen_t * dev )

Resets the display.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.

◆ scrollDisplay()

void scrollDisplay	(	screen_t *	dev,
		int	h,
		int	v
	)

Set the display's vertical or hrizontal scrolling functions.
Not supported by all displays, and different display types behave differently.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
h	Sets the horizontal display velocity, or for displays with only on/off modes, any non-zero value will trigger a horizontal scroll. Enter zero to stop horizontal scrolling.
v	Sets the vertical display velocity, or for displays with only on/off modes, any non-zero value will trigger a vertical scroll. Enter zero to stop vertical scrolling.

◆ setBgColor()

void setBgColor	(	screen_t *	dev,
		int	color
	)

Sets the color of the font and the color of the background (highlighting) to be used. Setting the text color and text background to the same color will make the background color transparent.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
color	Color of the font, in the format native to the display.

◆ setCursor()

void setCursor	(	screen_t *	dev,
		int	x,
		int	y,
		char	size
	)

Sets the cursor position based on the size parameter.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
x	Horizontal position of the cursor, counted from the left side of the screen.
y	Vertical position of the cursor, counted down from the top of the screen.
size	The size of the cursor. Correlated to font size: (0) moves the cursor in 1 pixel increments, (1) moves the cursor in font size 1 character increments, (2) moves the cursor in font size 2 increments and (3) moves the cursor in font size 3 increments

◆ setDisplayRotation()

void setDisplayRotation	(	screen_t *	dev,
		char	r
	)

Sets the screen's orientation.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
r	Number representing the orientation to set the display to. (0) means pixels are drawn to the screen is at it's native orientation, (1) means pixels are drawn rotated 90 degrees clockwise, (2) means pixels are drawn upside-down - 180 degrees rotated, and (3) means pixels are drawn rotated 270 degrees clockwise.

◆ setTextColor()

void setTextColor	(	screen_t *	dev,
		int	color
	)

Sets the color of the font and the color of the background (highlighting) to be used. Setting the text color and text background to the same color will make the background color transparent.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
color	Color of the font, in the format native to the display.

◆ setTextFont()

void setTextFont	(	screen_t *	dev,
		char	f
	)

Sets the font face to be used. Range is from 0 to 3.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
f	Font face to use. Font face (0) is a sans-serif (console) font, face (1) is serif (typewriter) font, face (2) is a script (handwriting) font and face (3) is a bubble (outline/cartoon) font.

◆ setTextSize()

void setTextSize	(	screen_t *	dev,
		char	s
	)

Sets the size of the font to be used. Range is from 1 to 3. Size (1) is 5x7 (6x8 spacing) pixels, size (2) is 11x15 (12x16 spacing) pixels and size (3) is 15x23 (16x24 spacing) pixels.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
s	Size of text to draw. 1 = small (5x7) font, 2 = medium (11x15) font, 3 = large (17x23) font.

◆ setTextWrap()

void setTextWrap	(	screen_t *	dev,
		char	w
	)

Toggles automatic wrapping of text printed to the screen.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
w	Wrapping (0) off -OR- (1) on.

◆ sleepWakeDisplay()

void sleepWakeDisplay	(	screen_t *	dev,
		char	i
	)

Toggle the display's sleep/wake mode. Not supported by all displays.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.
i	Set to 0 for awake and 1 for asleep.

◆ updateDisplay()

void updateDisplay ( screen_t * dev )

Updates the display by writing the image buffer to it. Not necessary for screens that have their own image buffers.

Parameters

dev	Pointer to the display's device structure returned by the initialization function.

Data Structures

Macros

Typedefs

Functions

Macro Definition Documentation

◆ absv

◆ BIN

◆ DEC

◆ FONT_BUBBLE

◆ FONT_SANS

◆ FONT_SCRIPT

◆ FONT_SERIF

◆ gfx_swap

◆ HEX

◆ INTF_I2C_NO_BUFFER

◆ INTF_I2C_WITH_BUFFER

◆ INTF_SPI_NO_BUFFER

◆ INTF_SPI_WITH_BUFFER

◆ LARGE

◆ MEDIUM

◆ OCT

◆ SMALL

Typedef Documentation

◆ screen

◆ screen_t

Function Documentation

◆ clearDisplay()

◆ drawBitmap()

◆ drawChar()

◆ drawCharLarge()

◆ drawCharMedium()

◆ drawCharSmall()

◆ drawCircle()

◆ drawCircleHelper()

◆ drawCopy()

◆ drawFastHLine()

◆ drawFastVLine()

◆ drawLine()

◆ drawNumber()

◆ drawPixel()

◆ drawPrint()

◆ drawRect()

◆ drawRoundRect()

◆ drawText()

◆ drawTriangle()

◆ fillCircle()

◆ fillCircleHelper()

◆ fillRect()

◆ fillRoundRect()

◆ fillTriangle()

◆ getCursorX()

◆ getCursorY()

◆ getDisplayHeight()

◆ getDisplayRotation()

◆ getDisplayWidth()

◆ getScrollHorizontal()

◆ getScrollVertical()

◆ invertDisplay()

◆ isAsleep()

◆ isInverted()

◆ loadFonts()

◆ resetDisplay()

◆ scrollDisplay()

◆ setBgColor()

◆ setCursor()

◆ setDisplayRotation()

◆ setTextColor()

◆ setTextFont()

◆ setTextSize()

◆ setTextWrap()

◆ sleepWakeDisplay()

◆ updateDisplay()