org.jpedal.fonts.tt.hinting

Class TTVM

java.lang.Object

org.jpedal.fonts.tt.hinting.TTVM

All Implemented Interfaces:

Serializable

public class TTVM
extends Object
implements Serializable

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	GLYPH_ZONE
protected static int	ORIGINAL
protected static int	TWILIGHT_ZONE

Constructor Summary

Constructors

Constructor and Description
TTVM(FontFile2 currentFontFile, Maxp maxp)

Method Summary

Modifier and Type	Method and Description
protected static double	getDoubleFromF26Dot6(int a) Takes a F26Dot6 number and returns the value as a double.
protected static double	getDoubleFromF2Dot14(int a) Takes a F2Dot14 number and returns the value as a double.
static String[]	getInstructionsAsStringArray(int[] program) DEBUG METHOD -
static boolean[]	getInstructionStreamIsData(int[] program) DEBUG METHOD -
protected static int	getIntFrom2Uint8(int high, int low) Takes two Uint8s containing 8 bits of data each and converts them to a signed integer.
static void	print(int[] program) DEBUG METHOD -
boolean	processGlyph(int[] instructions, int[] glyfX, int[] glyfY, boolean[] curves, boolean[] contours) Takes the information about a glyph specified and modifies it according to the instructions provided.
void	setScaleVars(double scaler, double ppem, double ptSize) Sets the scale variables for a font - if it's changed, the CVT needs to be rescaled, and the PreProgram (sometimes called CVT program) must be run again.
protected static int	storeDoubleAsF26Dot6(double a) Takes a double and returns the value as a F26Dot6 number.
protected static int	storeDoubleAsF2Dot14(double a) Takes a double and returns the value as a F2Dot14 number.

Methods inherited from class java.lang.Object

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

Field Detail

TWILIGHT_ZONE

protected static final int TWILIGHT_ZONE

See Also:

Constant Field Values

GLYPH_ZONE

protected static final int GLYPH_ZONE

See Also:

Constant Field Values

ORIGINAL

protected static final int ORIGINAL

See Also:

Constant Field Values

Constructor Detail

TTVM

public TTVM(FontFile2 currentFontFile,
            Maxp maxp)

Method Detail

setScaleVars

public void setScaleVars(double scaler,
                         double ppem,
                         double ptSize)

Sets the scale variables for a font - if it's changed, the CVT needs to be rescaled, and the PreProgram (sometimes called CVT program) must be run again. As it's always called before a glyph is processed, it's also the ideal place to ensure that the font program has been run before anything else.

Parameters:

scaler - The value to multiply any unscaled values by

ppem - The number of pixels per em square

ptSize - The point size of the text

processGlyph

public boolean processGlyph(int[] instructions,
                            int[] glyfX,
                            int[] glyfY,
                            boolean[] curves,
                            boolean[] contours)

Takes the information about a glyph specified and modifies it according to the instructions provided.

Parameters:

instructions - The instructions to execute

glyfX - A list of scaled X coordinates for the points

glyfY - A list of scaled Y coordinates for the points

curves - Whether each point is on the curve or not

contours - Whether each point is the last in a contour

getIntFrom2Uint8

protected static int getIntFrom2Uint8(int high,
                                      int low)

Takes two Uint8s containing 8 bits of data each and converts them to a signed integer.

Parameters:

high - first int

low - second int

Returns:

signed int

getDoubleFromF26Dot6

protected static double getDoubleFromF26Dot6(int a)

Takes a F26Dot6 number and returns the value as a double.

Parameters:

a - F26Dot6 value

Returns:

Double value

getDoubleFromF2Dot14

protected static double getDoubleFromF2Dot14(int a)

Takes a F2Dot14 number and returns the value as a double.

Parameters:

a - F2Dot14 value

Returns:

Double value

storeDoubleAsF26Dot6

protected static int storeDoubleAsF26Dot6(double a)

Takes a double and returns the value as a F26Dot6 number.

Parameters:

a - Double value

Returns:

F26Dot6 value

storeDoubleAsF2Dot14

protected static int storeDoubleAsF2Dot14(double a)

Takes a double and returns the value as a F2Dot14 number.

Parameters:

a - Double value

Returns:

F2Dot14 value

print

public static void print(int[] program)

DEBUG METHOD -

Prints out a set of instructions without executing them. It's not a quick method, as it uses reflection to do so!

Parameters:

program - Instructions to print

getInstructionsAsStringArray

public static String[] getInstructionsAsStringArray(int[] program)

DEBUG METHOD -

Converts an array of instructions in bytecode into a human-readable string array for display.

Parameters:

program -

Returns:

getInstructionStreamIsData

public static boolean[] getInstructionStreamIsData(int[] program)

DEBUG METHOD -

Converts an instruction stream into a boolean array indicating whether a line is an instruction or data.

Parameters:

program -

Returns: