org.extex.font.format.xtf.tables
Class TtfTableGLYF.SimpleDescript

java.lang.Object
  org.extex.font.format.xtf.tables.TtfTableGLYF.Descript
      org.extex.font.format.xtf.tables.TtfTableGLYF.SimpleDescript

All Implemented Interfaces:

XMLWriterConvertible

Enclosing class:

TtfTableGLYF

public class TtfTableGLYF.SimpleDescript
extends TtfTableGLYF.Descript

SimleDescript.

the table specifies the format of a simple glyph. A more detailed description 0f glyph outline requirements is given in Digitizing Letterform Designs.

Type	Name	Description
uint16	endPtsOfContours[n]	Array of last points of each contour; n is the number of contours; array entries are point indices
uint16	instructionLength	Total number of bytes needed for instructions
uint8	instructions[instructionLength]	Array of instructions for this glyph
uint8	flags[variable]	Array of flags
uint8 or int16	xCoordinates[]	Array of x-coordinates; the first is relative to (0,0), others are relative to previous point
uint8 or int16	yCoordinates[]	Array of y-coordinates; the first is relative to (0,0), others are relative to previous point

Each entry in the flags array is a byte in size.The meanings associated with each bit in that byte are given in Table 16 below.

Flags	Bit (0 is lsb)	Description
On Curve	0	If set, the point is on the curve; Otherwise, it is off the curve.
x-Short Vector	1	If set, the corresponding x-coordinate is 1 byte long; Otherwise, the corresponding x-coordinate is 2 bytes long
y-Short Vector	2	If set, the corresponding y-coordinate is 1 byte long; Otherwise, the corresponding y-coordinate is 2 bytes long
Repeat	3	If set, the next byte specifies the number of additional times this set of flags is to be repeated. In this way, the number of flags listed can be smaller than the number of points in a character.
This x is same (Positive x-Short vector)	4	This flag has one of two meanings, depending on how the x-Short Vector flag is set. If the x-Short Vector bit is set, this bit describes the sign of the value, with a value of 1 equalling positive and a zero value negative. If the x-short Vector bit is not set, and this bit is set, then the current x-coordinate is the same as the previous x-coordinate. If the x-short Vector bit is not set, and this bit is not set, the current x-coordinate is a signed 16-bit delta vector. In this case, the delta vector is the change in x
This y is same (Positive y-Short vector)	5	This flag has one of two meanings, depending on how the y-Short Vector flag is set. If the y-Short Vector bit is set, this bit describes the sign of the value, with a value of 1 equalling positive and a zero value negative. If the y-short Vector bit is not set, and this bit is set, then the current y-coordinate is the same as the previous y-coordinate.
Reserved	6 - 7	Set to zero

Field Summary

Fields inherited from class org.extex.font.format.xtf.tables.TtfTableGLYF.Descript

ONCURVE, parentTable, REPEAT, XDUAL, XSHORTVECTOR, YDUAL, YSHORTVECTOR

Method Summary

int	getContourCount() Returns the contour count.
int	getEndPtOfContours(int i) Returns the end pt of contours
byte	getFlags(int i) Returns the flags.
int	getPointCount() Returns the point count.
short	getXCoordinate(int i) Returns the x coordinate.
short	getYCoordinate(int i) Returns the y coordinate.
boolean	isComposite() Returns the composite.

Methods inherited from class org.extex.font.format.xtf.tables.TtfTableGLYF.Descript

getInstructions, getNumberOfContours, getXMax, getXMin, getYMax, getYMin, readInstructions, readInstructions, writeXML

Methods inherited from class java.lang.Object

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

Method Detail

getContourCount

public int getContourCount()

Returns the contour count.

Returns:

Returns the contour count.

See Also:

TtfTableGLYF.Descript.getContourCount()

getEndPtOfContours

public int getEndPtOfContours(int i)

Returns the end pt of contours

Parameters:

i - the index

Returns:

Returns the end pt of contours

See Also:

TtfTableGLYF.Descript.getEndPtOfContours(int)

getFlags

public byte getFlags(int i)

Returns the flags.

Parameters:

i - the index

Returns:

Returns the flags.

See Also:

TtfTableGLYF.Descript.getFlags(int)

getPointCount

public int getPointCount()

Returns the point count.

Returns:

Returns the point count.

See Also:

TtfTableGLYF.Descript.getPointCount()

getXCoordinate

public short getXCoordinate(int i)

Returns the x coordinate.

Parameters:

i - the index

Returns:

Returns the x coordinate

See Also:

TtfTableGLYF.Descript.getXCoordinate(int)

getYCoordinate

public short getYCoordinate(int i)

Returns the y coordinate.

Parameters:

i - the index

Returns:

Returns the y coordinate

See Also:

TtfTableGLYF.Descript.getYCoordinate(int)

isComposite

public boolean isComposite()

Returns the composite.

Returns:

Returns the composite.

See Also:

TtfTableGLYF.Descript.isComposite()