Package com.itextpdf.text.pdf

Class TrueTypeFontUnicode

java.lang.Object
com.itextpdf.text.pdf.BaseFont
com.itextpdf.text.pdf.TrueTypeFont
com.itextpdf.text.pdf.TrueTypeFontUnicode
All Implemented Interfaces:
Comparator<int[]>
class TrueTypeFontUnicode extends TrueTypeFont implements Comparator<int[]>
Represents a True Type font with Unicode encoding. All the character in the font can be used directly by using the encoding Identity-H or Identity-V. This is the only way to represent some character sets such as Thai.

  • Field Details

    • SUPPORTED_LANGUAGES_FOR_OTF

      private static final List<Language> SUPPORTED_LANGUAGES_FOR_OTF

    • glyphSubstitutionMap

      private Map<String,Glyph> glyphSubstitutionMap

    • supportedLanguage

      private Language supportedLanguage

    • rotbits

      private static final byte[] rotbits

  • Constructor Details

    • TrueTypeFontUnicode

      TrueTypeFontUnicode(String ttFile, String enc, boolean emb, byte[] ttfAfm, boolean forceRead) throws DocumentException, IOException
      Creates a new TrueType font addressed by Unicode characters. The font will always be embedded.
      Parameters:
      ttFile - the location of the font on file. The file must end in '.ttf'. The modifiers after the name are ignored.
      enc - the encoding to be applied to this font
      emb - true if the font is to be embedded in the PDF
      ttfAfm - the font as a byte array
      Throws:
      DocumentException - the font is invalid
      IOException - the font file could not be read

  • Method Details

    • process

      void process(byte[] ttfAfm, boolean preload) throws DocumentException, IOException
      Description copied from class: TrueTypeFont
      Reads the font data.
      Overrides:
      process in class TrueTypeFont
      Parameters:
      ttfAfm - the font as a byte array, possibly null
      Throws:
      DocumentException - the font is invalid
      IOException - the font file could not be read

    • getWidth

      public int getWidth(int char1)
      Gets the width of a char in normalized 1000 units.
      Overrides:
      getWidth in class BaseFont
      Parameters:
      char1 - the unicode char to get the width of
      Returns:
      the width in normalized 1000 units

    • getWidth

      public int getWidth(String text)
      Gets the width of a String in normalized 1000 units.
      Overrides:
      getWidth in class BaseFont
      Parameters:
      text - the String to get the width of
      Returns:
      the width in normalized 1000 units

    • getToUnicode

      public PdfStream getToUnicode(Object[] metrics)
      Creates a ToUnicode CMap to allow copy and paste from Acrobat.
      Parameters:
      metrics - metrics[0] contains the glyph index and metrics[2] contains the Unicode code
      Returns:
      the stream representing this CMap or null

    • toHex4

      private static String toHex4(int n)

    • toHex

      static String toHex(int n)
      Gets an hex string in the format "<HHHH>".
      Parameters:
      n - the number
      Returns:
      the hex string

    • getCIDFontType2

      public PdfDictionary getCIDFontType2(PdfIndirectReference fontDescriptor, String subsetPrefix, Object[] metrics)
      Generates the CIDFontTyte2 dictionary.
      Parameters:
      fontDescriptor - the indirect reference to the font descriptor
      subsetPrefix - the subset prefix
      metrics - the horizontal width metrics
      Returns:
      a stream

    • getFontBaseType

      public PdfDictionary getFontBaseType(PdfIndirectReference descendant, String subsetPrefix, PdfIndirectReference toUnicode)
      Generates the font dictionary.
      Parameters:
      descendant - the descendant dictionary
      subsetPrefix - the subset prefix
      toUnicode - the ToUnicode stream
      Returns:
      the stream

    • GetCharFromGlyphId

      public int GetCharFromGlyphId(int gid)

    • compare

      public int compare(int[] o1, int[] o2)
      The method used to sort the metrics array.
      Specified by:
      compare in interface Comparator<int[]>
      Parameters:
      o1 - the first element
      o2 - the second element
      Returns:
      the comparison

    • writeFont

      void writeFont(PdfWriter writer, PdfIndirectReference ref, Object[] params) throws DocumentException, IOException
      Outputs to the writer the font dictionaries and streams.
      Overrides:
      writeFont in class TrueTypeFont
      Parameters:
      writer - the writer for this document
      ref - the font indirect reference
      params - several parameters that depend on the font type
      Throws:
      IOException - on error
      DocumentException - error in generating the object

    • getFullFontStream

      public PdfStream getFullFontStream() throws IOException, DocumentException
      Returns a PdfStream object with the full font program.
      Overrides:
      getFullFontStream in class TrueTypeFont
      Returns:
      a PdfStream with the font program
      Throws:
      IOException
      DocumentException
      Since:
      2.1.3

    • convertToBytes

      public byte[] convertToBytes(String text)
      A forbidden operation. Will throw a null pointer exception.
      Overrides:
      convertToBytes in class BaseFont
      Parameters:
      text - the text
      Returns:
      always null

    • convertToBytes

      byte[] convertToBytes(int char1)
      Description copied from class: BaseFont
      Converts a char to a byte array according to the font's encoding.
      Overrides:
      convertToBytes in class BaseFont
      Parameters:
      char1 - the char to be converted
      Returns:
      an array of byte representing the conversion according to the font's encoding

    • getMetricsTT

      public int[] getMetricsTT(int c)
      Gets the glyph index and metrics for a character.
      Overrides:
      getMetricsTT in class TrueTypeFont
      Parameters:
      c - the character
      Returns:
      an int array with {glyph index, width}

    • charExists

      public boolean charExists(int c)
      Checks if a character exists in this font.
      Overrides:
      charExists in class BaseFont
      Parameters:
      c - the character to check
      Returns:
      true if the character has a glyph, false otherwise

    • setCharAdvance

      public boolean setCharAdvance(int c, int advance)
      Sets the character advance.
      Overrides:
      setCharAdvance in class BaseFont
      Parameters:
      c - the character
      advance - the character advance normalized to 1000 units
      Returns:
      true if the advance was set, false otherwise

    • getCharBBox

      public int[] getCharBBox(int c)
      Description copied from class: BaseFont
      Gets the smallest box enclosing the character contours. It will return null if the font has not the information or the character has no contours, as in the case of the space, for example. Characters with no contours may also return [0,0,0,0].
      Overrides:
      getCharBBox in class BaseFont
      Parameters:
      c - the character to get the contour bounding box from
      Returns:
      an array of four floats with the bounding box in the format [llx,lly,urx,ury] or null

    • getGlyphSubstitutionMap

      protected Map<String,Glyph> getGlyphSubstitutionMap()

    • getSupportedLanguage

      Language getSupportedLanguage()

    • readGsubTable

      private void readGsubTable() throws IOException
      Throws:
      IOException