Package org.apache.fop.fonts.truetype
Class TTFSubSetFile
- java.lang.Object
-
- org.apache.fop.fonts.truetype.OpenFont
-
- org.apache.fop.fonts.truetype.TTFFile
-
- org.apache.fop.fonts.truetype.TTFSubSetFile
-
public class TTFSubSetFile extends TTFFile
Reads a TrueType file and generates a subset that can be used to embed a TrueType CID font. TrueType tables needed for embedded CID fonts are: "head", "hhea", "loca", "maxp", "cvt ", "prep", "glyf", "hmtx" and "fpgm". The TrueType spec can be found at the Microsoft Typography site: http://www.microsoft.com/truetype/
-
-
Nested Class Summary
-
Nested classes/interfaces inherited from class org.apache.fop.fonts.truetype.OpenFont
OpenFont.PostScriptVersion
-
-
Field Summary
Fields Modifier and Type Field Description protected int
currentPos
protected int[]
glyphOffsets
Stores the glyph offsets so that we can end strings at glyph boundariesprotected int
locaOffset
protected java.util.Map<OFTableName,OFDirTabEntry>
newDirTabs
The dir tab entries in the new subset font.protected java.util.Map<OFTableName,java.lang.Integer>
offsets
protected byte[]
output
protected int
realSize
-
Fields inherited from class org.apache.fop.fonts.truetype.OpenFont
advancedTableReader, cid, dirTabs, embedFontName, familyNames, fontFile, fullName, lastLoca, locaFormat, log, mtxTab, nhmtx, notice, numberOfGlyphs, postScriptName, subFamilyName, TRACE_ENABLED, unicodeMappings, useAdvanced, useKerning
-
-
Constructor Summary
Constructors Constructor Description TTFSubSetFile()
Default ConstructorTTFSubSetFile(boolean useKerning, boolean useAdvanced)
Constructor
-
Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description protected int[]
buildSubsetIndexToOrigIndexMap(java.util.Map<java.lang.Integer,java.lang.Integer> glyphs)
protected void
createCheckSumAdjustment()
protected boolean
createCvt(FontFileReader in)
Copy the cvt table as is from original font to subset fontprotected void
createDirectory()
Create the directory tableprotected boolean
createFpgm(FontFileReader in)
Copy the fpgm table as is from original font to subset fontprotected void
createHead(FontFileReader in)
Copy the head table as is from original font to subset font and set indexToLocaFormat to long and set checkSumAdjustment to 0, store offset to checkSumAdjustment in checkSumAdjustmentOffsetprotected void
createHhea(FontFileReader in, int size)
Copy the hhea table as is from original font to subset font and fill in size of hmtx tableprotected void
createHmtx(FontFileReader in, java.util.Map<java.lang.Integer,java.lang.Integer> glyphs)
Create the hmtx table by copying metrics from original font to subset font.protected void
createLoca(int size)
Create an empty loca table without updating checksumprotected void
createMaxp(FontFileReader in, int size)
Copy the maxp table as is from original font to subset font and set num glyphs to sizeprotected boolean
createName(FontFileReader in)
Copy the name table as is from the original.protected boolean
createOS2(FontFileReader in)
Copy the OS/2 table as is from the original.protected void
createPost(FontFileReader in)
protected boolean
createPrep(FontFileReader in)
Copy the prep table as is from original font to subset fontprotected static int
getCheckSum(byte[] data, int start, int size)
byte[]
getFontSubset()
Returns a subset of the fonts (readFont() MUST be called first in order to create the subset).protected void
pad4()
Create a padding in the fontfile to align on a 4-byte boundaryvoid
readFont(FontFileReader in, java.lang.String name, java.lang.String header, java.util.Map<java.lang.Integer,java.lang.Integer> glyphs)
Reads a font and creates a subset of the font.protected void
scanGlyphs(FontFileReader in, java.util.Map<java.lang.Integer,java.lang.Integer> subsetGlyphs)
void
stream(TTFOutputStream ttfOut)
Streams a font.protected void
updateCheckSum(int tableStart, int tableSize, OFTableName tableName)
protected void
writeBytes(byte[] b)
protected void
writeULong(int pos, int s)
Appends a ULONG to the output array, at the given position without changing currentPosprotected void
writeUShort(int s)
Appends a USHORT to the output array, updates currentPost but not realSizeprotected void
writeUShort(int pos, int s)
Appends a USHORT to the output array, at the given position without changing currentPos-
Methods inherited from class org.apache.fop.fonts.truetype.TTFFile
getLastGlyfLocation, initializeFont, readIndexToLocation, readName, updateBBoxAndOffset
-
Methods inherited from class org.apache.fop.fonts.truetype.OpenFont
checkTTC, convertTTFUnit2PDFUnit, createCMaps, determineAscDesc, getAnsiKerning, getBBox, getBBoxRaw, getBoundingBoxes, getCapHeight, getCharSetName, getCharWidth, getCharWidthRaw, getCMaps, getCopyrightNotice, getDirectoryEntry, getEmbedFontName, getFamilyNames, getFirstChar, getFlags, getFontBBox, getFullName, getGDEF, getGPOS, getGSUB, getItalicAngle, getKerning, getLastChar, getLowerCaseAscent, getLowerCaseDescent, getMtx, getNumGlyphs, getPadSize, getPostScriptName, getStemV, getStrikeoutPosition, getStrikeoutThickness, getSubFamilyName, getTTCnames, getUnderlinePosition, getUnderlineThickness, getWeightClass, getWidths, getXHeight, guessVerticalMetricsFromGlyphBBox, handleCharacterSpacing, hasAdvancedTable, initAnsiWidths, isCFF, isEmbeddable, main, printStuff, readCMAP, readDirTabs, readFont, readFont, readFont, readFontHeader, readHorizontalHeader, readHorizontalMetrics, readKerning, readOS2, readPCLT, readPostScript, seekTab
-
-
-
-
Field Detail
-
output
protected byte[] output
-
realSize
protected int realSize
-
currentPos
protected int currentPos
-
offsets
protected java.util.Map<OFTableName,java.lang.Integer> offsets
-
locaOffset
protected int locaOffset
-
glyphOffsets
protected int[] glyphOffsets
Stores the glyph offsets so that we can end strings at glyph boundaries
-
newDirTabs
protected java.util.Map<OFTableName,OFDirTabEntry> newDirTabs
The dir tab entries in the new subset font.
-
-
Method Detail
-
createDirectory
protected void createDirectory()
Create the directory table
-
createLoca
protected void createLoca(int size) throws java.io.IOException
Create an empty loca table without updating checksum- Throws:
java.io.IOException
-
createCvt
protected boolean createCvt(FontFileReader in) throws java.io.IOException
Copy the cvt table as is from original font to subset font- Throws:
java.io.IOException
-
createFpgm
protected boolean createFpgm(FontFileReader in) throws java.io.IOException
Copy the fpgm table as is from original font to subset font- Throws:
java.io.IOException
-
createName
protected boolean createName(FontFileReader in) throws java.io.IOException
Copy the name table as is from the original.- Throws:
java.io.IOException
-
createOS2
protected boolean createOS2(FontFileReader in) throws java.io.IOException
Copy the OS/2 table as is from the original.- Throws:
java.io.IOException
-
createMaxp
protected void createMaxp(FontFileReader in, int size) throws java.io.IOException
Copy the maxp table as is from original font to subset font and set num glyphs to size- Throws:
java.io.IOException
-
createPost
protected void createPost(FontFileReader in) throws java.io.IOException
- Throws:
java.io.IOException
-
createPrep
protected boolean createPrep(FontFileReader in) throws java.io.IOException
Copy the prep table as is from original font to subset font- Throws:
java.io.IOException
-
createHhea
protected void createHhea(FontFileReader in, int size) throws java.io.IOException
Copy the hhea table as is from original font to subset font and fill in size of hmtx table- Throws:
java.io.IOException
-
createHead
protected void createHead(FontFileReader in) throws java.io.IOException
Copy the head table as is from original font to subset font and set indexToLocaFormat to long and set checkSumAdjustment to 0, store offset to checkSumAdjustment in checkSumAdjustmentOffset- Throws:
java.io.IOException
-
buildSubsetIndexToOrigIndexMap
protected int[] buildSubsetIndexToOrigIndexMap(java.util.Map<java.lang.Integer,java.lang.Integer> glyphs)
-
createHmtx
protected void createHmtx(FontFileReader in, java.util.Map<java.lang.Integer,java.lang.Integer> glyphs) throws java.io.IOException
Create the hmtx table by copying metrics from original font to subset font. The glyphs Map contains an Integer key and Integer value that maps the original metric (key) to the subset metric (value)- Throws:
java.io.IOException
-
readFont
public void readFont(FontFileReader in, java.lang.String name, java.lang.String header, java.util.Map<java.lang.Integer,java.lang.Integer> glyphs) throws java.io.IOException
Reads a font and creates a subset of the font.- Parameters:
in
- FontFileReader to read fromname
- Name to be checked for in the font fileglyphs
- Map of glyphs (glyphs has old index as (Integer) key and new index as (Integer) value)- Throws:
java.io.IOException
- in case of an I/O problem
-
getFontSubset
public byte[] getFontSubset()
Returns a subset of the fonts (readFont() MUST be called first in order to create the subset).- Returns:
- byte array
-
stream
public void stream(TTFOutputStream ttfOut) throws java.io.IOException
Description copied from class:OpenFont
Streams a font.
-
scanGlyphs
protected void scanGlyphs(FontFileReader in, java.util.Map<java.lang.Integer,java.lang.Integer> subsetGlyphs) throws java.io.IOException
- Throws:
java.io.IOException
-
writeBytes
protected void writeBytes(byte[] b)
-
writeUShort
protected void writeUShort(int s)
Appends a USHORT to the output array, updates currentPost but not realSize
-
writeUShort
protected void writeUShort(int pos, int s)
Appends a USHORT to the output array, at the given position without changing currentPos
-
writeULong
protected void writeULong(int pos, int s)
Appends a ULONG to the output array, at the given position without changing currentPos
-
pad4
protected void pad4()
Create a padding in the fontfile to align on a 4-byte boundary
-
updateCheckSum
protected void updateCheckSum(int tableStart, int tableSize, OFTableName tableName)
-
getCheckSum
protected static int getCheckSum(byte[] data, int start, int size)
-
createCheckSumAdjustment
protected void createCheckSumAdjustment()
-
-