Package lejos.hardware.lcd

Class Font

java.lang.Object

lejos.hardware.lcd.Font

All Implemented Interfaces:

java.io.Serializable

public class Font
extends java.lang.Object
implements java.io.Serializable

Provides access to fonts for use with the display or images. The actual font data is held as a series of glyphs with all inter character spacing removed. The format of the bitmap is in standard leJOS format (so aligned for use on NXT LCD display). There is one bit per pixel. The pixels are packed into bytes with each byte spanning 8 scan lines. The least significant bit of each byte is the pixel for the top most scan line, the most significant bit is the 8th scan line. Values of 1 represent black. 0 white.

Author:

Andy

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
int	base
int	firstChar
int	glyphCount
byte[]	glyphs
int	glyphWidth
int	height
static int	SIZE_LARGE
static int	SIZE_MEDIUM
static int	SIZE_SMALL
int	width

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Font(byte[] glyphs, int width, int height, int base, int glyphWidth, int count, int first)	Create a new font for the specified NXT format glyph map

Method Summary

Modifier and Type	Method	Description
int	getBaselinePosition()	Return the base line position in pixels.
static Font	getDefaultFont()	Return the system font.
static Font	getFont(int face, int style, int size)	Request a particular type and size of font.
int	getHeight()	return the height of the font in pixels.
static Font	getLargeFont()	Return the large font.
static Font	getSmallFont()	Return the small font.
int	stringWidth(java.lang.String str)	Return the width of the specified string in pixels

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

width

public final int width

height

public final int height

glyphWidth

public final int glyphWidth

glyphCount

public final int glyphCount

firstChar

public final int firstChar

base

public final int base

glyphs

public final byte[] glyphs

SIZE_SMALL

public static final int SIZE_SMALL

See Also:

Constant Field Values

SIZE_MEDIUM

public static final int SIZE_MEDIUM

See Also:

Constant Field Values

SIZE_LARGE

public static final int SIZE_LARGE

See Also:

Constant Field Values

Constructor Detail

Font

protected Font(byte[] glyphs,
               int width,
               int height,
               int base,
               int glyphWidth,
               int count,
               int first)

Create a new font for the specified NXT format glyph map

Parameters:

glyphs - the actual bytes of the glyph.

width - The cell width.

height - The cell height.

glyphWidth - The width of the glyph bits.

Method Detail

getDefaultFont

public static Font getDefaultFont()

Return the system font.

Returns:

current system font object

getHeight

public int getHeight()

return the height of the font in pixels.

Returns:

pixel height

getBaselinePosition

public int getBaselinePosition()

Return the base line position in pixels. This is the offset from the top of the font.

Returns:

base position.

stringWidth

public int stringWidth(java.lang.String str)

Return the width of the specified string in pixels

Parameters:

str -

Returns:

width of the string

getFont

public static Font getFont(int face,
                           int style,
                           int size)

Request a particular type and size of font. Currently only the size parameter is used and it should be one of SIZE_SMALL, SIZE_MEDIUM or SIZE_LARGE.

Parameters:

face -

style -

size -

Returns:

The requested Font

getSmallFont

public static Font getSmallFont()

Return the small font.

Returns:

the small font

getLargeFont

public static Font getLargeFont()

Return the large font.

Returns:

the large font