Package gov.nih.mipav.model.algorithms

Class ContourPlot.SignedDistanceCharacters

java.lang.Object

gov.nih.mipav.model.algorithms.ContourPlot.SignedDistanceCharacters

Enclosing class:

ContourPlot

public static class ContourPlot.SignedDistanceCharacters
extends Object

The SignedDistanceCharacters class comprises signed distance fields of a set of characters. A signed distance field is an image in which each pixel encodes the distance to the nearest edge. Such an image of a character glyph allows for efficient rendering of text with arbitrary size and rotation using alpha testing and blending. For more details read this paper dl.acm.org/citation.cfm?id=1281665.

The signed distance fields for each character are stored in a single image alongside a lookup table for the bounding rectangles for each character within that image. The set of characters used is defined in CHARACTERS which is a String sorted by char value ascending.

Since the process of computing a SignedDistanceCharacters object is quite time consuming, there are pre-computed SignedDistanceCharacters instances for the Ubuntu Mono font used by JPlotter (see ContourPlot.FontProvider) which are statically loaded from files. These are located in .../resources/font/ alongside the corresponding true type font files. Similar to the ContourPlot.FontProvider.getUbuntuMono(float, int) the

invalid reference

#getUbuntuMonoSDC(int)

method can be used to access the pre-computed SignedDistanceCharacters.

Author:

hageldave

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CHARACTERS	Character set for instances of ContourPlot.SignedDistanceCharacters.
protected static final ContourPlot.Img	FONTMETRIC_IMG
protected static final int	genFontSize
protected static final int	padding

Constructor Summary

Constructors

Constructor	Description
SignedDistanceCharacters()

Method Summary

Methods inherited from class java.lang.Object

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

Field Details

genFontSize

protected static final int genFontSize

See Also:

• Constant Field Values

padding

protected static final int padding

See Also:

• Constant Field Values

FONTMETRIC_IMG

protected static final ContourPlot.Img FONTMETRIC_IMG

CHARACTERS

public static final String CHARACTERS

Character set for instances of ContourPlot.SignedDistanceCharacters. Characters in this string are sorted by char value ascending.

See Also:

• Constant Field Values

Constructor Details

SignedDistanceCharacters

public SignedDistanceCharacters()