com.itextpdf.io.font

Class ItextTrueTypeFont

java.lang.Object

com.itextpdf.io.font.FontProgram

com.itextpdf.io.font.TrueTypeFont

com.itextpdf.io.font.ItextTrueTypeFont

public class ItextTrueTypeFont
extends com.itextpdf.io.font.TrueTypeFont

iText TrueType字体解析器

由于 TrueTypeFont(OpenTypeParser fontParser) 构造器私有无法扩展自定义字体解析器，因此采用重载重新部分功能。 源码来自于Itext 7.1.13 的TrueTypeFont类 使用类ItextOpenTypeParser替换了类OpenTypeParser

Since:

2024-3-21 18:36:35

Field Summary

Fields

Modifier and Type	Field and Description
protected int[][]	bBoxes
boolean	isEmptyCmap 默认为非空，如果解析到cmap表为空，则设置为true
protected boolean	isVertical
protected com.itextpdf.io.util.IntHashtable	kerning The map containing the kerning information.

Fields inherited from class com.itextpdf.io.font.FontProgram

avgWidth, codeToGlyph, DEFAULT_WIDTH, encodingScheme, fontIdentification, fontMetrics, fontNames, isFontSpecific, registry, unicodeToGlyph, UNITS_NORMALIZATION

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ItextTrueTypeFont()
	ItextTrueTypeFont(byte[] ttf)
	ItextTrueTypeFont(String path)

Method Summary

Modifier and Type	Method and Description
void	close()
Map<Integer,int[]>	getActiveCmap()
String[]	getCodePagesSupported() Gets the code pages supported by the font.
int	getDirectoryOffset() The offset from the start of the file to the table directory.
byte[]	getFontStreamBytes()
com.itextpdf.io.font.otf.OpenTypeGdefTableReader	getGdefTable()
com.itextpdf.io.font.otf.GlyphPositioningTableReader	getGposTable()
com.itextpdf.io.font.otf.GlyphSubstitutionTableReader	getGsubTable()
int	getKerning(com.itextpdf.io.font.otf.Glyph first, com.itextpdf.io.font.otf.Glyph second) Gets the kerning between two glyphs.
int	getPdfFontFlags()
byte[]	getSubset(Set<Integer> glyphs, boolean subset)
boolean	hasKernPairs()
boolean	isBuiltWith(String fontProgram)
boolean	isCff()
protected void	readGdefTable()
protected void	readGposTable()
protected void	readGsubTable()
void	updateUsedGlyphs(SortedSet<Integer> usedGlyphs, boolean subset, List<int[]> subsetRanges) The method will update usedGlyphs with additional range or with all glyphs if there is no subset.

Methods inherited from class com.itextpdf.io.font.TrueTypeFont

mapGlyphsCidsToGids

Methods inherited from class com.itextpdf.io.font.FontProgram

countOfGlyphs, fixSpaceIssue, getAvgWidth, getCharBBox, getFontIdentification, getFontMetrics, getFontNames, getGlyph, getGlyphByCode, getKerning, getRegistry, getWidth, isFontSpecific, setBbox, setBold, setCapHeight, setFixedPitch, setFontFamily, setFontName, setFontStretch, setFontWeight, setItalicAngle, setRegistry, setStemH, setStemV, setTypoAscender, setTypoDescender, setXHeight, toString

Methods inherited from class java.lang.Object

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

Field Detail

isEmptyCmap

public boolean isEmptyCmap

默认为非空，如果解析到cmap表为空，则设置为true

bBoxes

protected int[][] bBoxes

isVertical

protected boolean isVertical

kerning

protected com.itextpdf.io.util.IntHashtable kerning

The map containing the kerning information. It represents the content of table 'kern'. The key is an Integer where the top 16 bits are the glyph number for the first character and the lower 16 bits are the glyph number for the second character. The value is the amount of kerning in normalized 1000 units as an Integer. This value is usually negative.

Constructor Detail

ItextTrueTypeFont

protected ItextTrueTypeFont()

ItextTrueTypeFont

public ItextTrueTypeFont(String path)
                  throws IOException

Throws:

IOException

ItextTrueTypeFont

public ItextTrueTypeFont(byte[] ttf)
                  throws IOException

Throws:

IOException

Method Detail

hasKernPairs

public boolean hasKernPairs()

Overrides:

hasKernPairs in class com.itextpdf.io.font.TrueTypeFont

getKerning

public int getKerning(com.itextpdf.io.font.otf.Glyph first,
                      com.itextpdf.io.font.otf.Glyph second)

Gets the kerning between two glyphs.

Overrides:

getKerning in class com.itextpdf.io.font.TrueTypeFont

Parameters:

first - the first glyph

second - the second glyph

Returns:

the kerning to be applied

isCff

public boolean isCff()

Overrides:

isCff in class com.itextpdf.io.font.TrueTypeFont

getActiveCmap

public Map<Integer,int[]> getActiveCmap()

Overrides:

getActiveCmap in class com.itextpdf.io.font.TrueTypeFont

getFontStreamBytes

public byte[] getFontStreamBytes()

Overrides:

getFontStreamBytes in class com.itextpdf.io.font.TrueTypeFont

getPdfFontFlags

public int getPdfFontFlags()

Overrides:

getPdfFontFlags in class com.itextpdf.io.font.TrueTypeFont

getDirectoryOffset

public int getDirectoryOffset()

The offset from the start of the file to the table directory. It is 0 for TTF and may vary for TTC depending on the chosen font.

Overrides:

getDirectoryOffset in class com.itextpdf.io.font.TrueTypeFont

Returns:

directory Offset

getGsubTable

public com.itextpdf.io.font.otf.GlyphSubstitutionTableReader getGsubTable()

Overrides:

getGsubTable in class com.itextpdf.io.font.TrueTypeFont

getGposTable

public com.itextpdf.io.font.otf.GlyphPositioningTableReader getGposTable()

Overrides:

getGposTable in class com.itextpdf.io.font.TrueTypeFont

getGdefTable

public com.itextpdf.io.font.otf.OpenTypeGdefTableReader getGdefTable()

Overrides:

getGdefTable in class com.itextpdf.io.font.TrueTypeFont

getSubset

public byte[] getSubset(Set<Integer> glyphs,
                        boolean subset)

Overrides:

getSubset in class com.itextpdf.io.font.TrueTypeFont

readGdefTable

protected void readGdefTable()
                      throws IOException

Overrides:

readGdefTable in class com.itextpdf.io.font.TrueTypeFont

Throws:

IOException

readGsubTable

protected void readGsubTable()
                      throws IOException

Overrides:

readGsubTable in class com.itextpdf.io.font.TrueTypeFont

Throws:

IOException

readGposTable

protected void readGposTable()
                      throws IOException

Overrides:

readGposTable in class com.itextpdf.io.font.TrueTypeFont

Throws:

IOException

getCodePagesSupported

public String[] getCodePagesSupported()

Gets the code pages supported by the font.

Overrides:

getCodePagesSupported in class com.itextpdf.io.font.TrueTypeFont

Returns:

the code pages supported by the font

isBuiltWith

public boolean isBuiltWith(String fontProgram)

Overrides:

isBuiltWith in class com.itextpdf.io.font.TrueTypeFont

close

public void close()
           throws IOException

Overrides:

close in class com.itextpdf.io.font.TrueTypeFont

Throws:

IOException

updateUsedGlyphs

public void updateUsedGlyphs(SortedSet<Integer> usedGlyphs,
                             boolean subset,
                             List<int[]> subsetRanges)

The method will update usedGlyphs with additional range or with all glyphs if there is no subset. This set of used glyphs can be used for building width array and ToUnicode CMAP.

Overrides:

updateUsedGlyphs in class com.itextpdf.io.font.TrueTypeFont

Parameters:

usedGlyphs - a set of integers, which are glyph ids that denote used glyphs. This set is updated inside of the method if needed.

subset - subset status

subsetRanges - additional subset ranges