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

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

All Implemented Interfaces:

XMLWriterConvertible

Direct Known Subclasses:

TtfTableGLYF.CompositeDescript, TtfTableGLYF.SimpleDescript

Enclosing class:

TtfTableGLYF

public abstract static class TtfTableGLYF.Descript
extends java.lang.Object
implements XMLWriterConvertible

Simple Glyph Description.

Array of last points of each contour; n is the number of contours.

Type	Name	Description
USHORT	endPtsOfContours[n]
USHORT	instructionLength	Total number of bytes for instructions.
BYTE	instructions[n]	Array of instructions for each glyph; n is the number of instructions.
BYTE	flags[n]	Array of flags for each coordinate in outline; n is the number of flags.
BYTE or SHORT	xCoordinates[ ]	First coordinates relative to (0,0); others are relative to previous point.
BYTE or SHORT	yCoordinates[ ]	First coordinates relative to (0,0); others are relative to previous point.

Each flag is a single byte. Their meanings are shown below.

/tr>

Flags	Bit	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, not 2.
y-Short Vector	2	If set, the corresponding y-coordinate is 1 byte long, not 2.
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 two meanings, depending on how the x-Short Vector flag is set. If x-Short Vector is set, this bit describes the sign of the value, with 1 equalling positive and 0 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 also not set, the current x-coordinate is a signed 16-bit delta vector.
This y is same (Positive y-Short Vector)	5	This flag has two meanings, depending on how the y-Short Vector flag is set. If y-Short Vector is set, this bit describes the sign of the value, with 1 equalling positive and 0 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. If the y-Short Vector bit is not set and this bit is also not set, the current y-coordinate is a signed 16-bit delta vector.
Reserved	6	This bit is reserved. Set it to zero.
Reserved	7	This bit is reserved. Set it to zero.

Field Summary

static byte	ONCURVE Flag: ONCURVE
protected TtfTableGLYF	parentTable parent table
static byte	REPEAT Flag: REPEAT
static byte	XDUAL Flag: XDUAL
static byte	XSHORTVECTOR Flag: XSHORTVECTOR
static byte	YDUAL Flag: YDUAL
static byte	YSHORTVECTOR Flag: YSHORTVECTOR

Constructor Summary

protected

TtfTableGLYF.Descript(TtfTableGLYF parentTable, short numberOfContours, java.io.ByteArrayInputStream bais) Create a new object.

Method Summary

short[]	getInstructions() Returns the instructions
int	getNumberOfContours() Returns the number of contours.
short	getXMax() Returns the x max.
short	getXMin() Returns the x min.
short	getYMax() Returns the y max.
short	getYMin() Returns the y min.
protected void	readInstructions(java.io.ByteArrayInputStream bais, int count) Read the instructions
protected void	readInstructions(RandomAccessR rar, int count) Read the instructions
void	writeXML(XMLStreamWriter writer) Write the data to a XMLStreamWriter.

Methods inherited from class java.lang.Object

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

Field Detail

ONCURVE

public static final byte ONCURVE

Flag: ONCURVE

See Also:

Constant Field Values

REPEAT

public static final byte REPEAT

Flag: REPEAT

See Also:

Constant Field Values

XDUAL

public static final byte XDUAL

Flag: XDUAL

See Also:

Constant Field Values

XSHORTVECTOR

public static final byte XSHORTVECTOR

Flag: XSHORTVECTOR

See Also:

Constant Field Values

YDUAL

public static final byte YDUAL

Flag: YDUAL

See Also:

Constant Field Values

YSHORTVECTOR

public static final byte YSHORTVECTOR

Flag: YSHORTVECTOR

See Also:

Constant Field Values

parentTable

protected TtfTableGLYF parentTable

parent table

Constructor Detail

TtfTableGLYF.Descript

protected TtfTableGLYF.Descript(TtfTableGLYF parentTable,
                                short numberOfContours,
                                java.io.ByteArrayInputStream bais)

Create a new object.

Parameters:

parentTable - the parent table

numberOfContours - number of conttours

bais - the basis

Method Detail

getInstructions

public short[] getInstructions()

Returns the instructions

Returns:

Returns the instructions

getNumberOfContours

public int getNumberOfContours()

Returns the number of contours.

Returns:

Returns the number of contours.

getXMax

public short getXMax()

Returns the x max.

Returns:

Returns the x max.

getXMin

public short getXMin()

Returns the x min.

Returns:

Returns the x min

getYMax

public short getYMax()

Returns the y max.

Returns:

Returns the y max.

getYMin

public short getYMin()

Returns the y min.

Returns:

Returns the y min.

readInstructions

protected void readInstructions(java.io.ByteArrayInputStream bais,
                                int count)

Read the instructions

Parameters:

bais - input

count - count

readInstructions

protected void readInstructions(RandomAccessR rar,
                                int count)
                         throws java.io.IOException

Read the instructions

Parameters:

rar - input

count - count

Throws:

java.io.IOException - if an IO-error occurs

writeXML

public void writeXML(XMLStreamWriter writer)
              throws java.io.IOException

Write the data to a XMLStreamWriter.

Specified by:

writeXML in interface XMLWriterConvertible

Parameters:

writer - the XML-Writer

Throws:

java.io.IOException - if an IO-error occurs.

See Also:

XMLWriterConvertible.writeXML( org.extex.util.xml.XMLStreamWriter)