Examples of org.axsl.ps.Encoding

org.axsl.ps.Encoding

Encoding instances provide some standard encoding resources for PostScript. When a PostScript file is parsed, the characters in a string are really indices into an array of glyph names, which are in turn the keys to entries in a glyph dictionary. Input to a PostScript interpreter is not really characters, but rather character indexes. (The two might be the same, especially for ASCII characters).

So the PostScript interpreter uses a two-step process, as follows: 1. It conceptually maps character codes (integer values) to name objects like /A or /Uacute. This map is known as an "encoding". There are several standard encoding schemes defined in the PostScript standard that each interpreter must know how to handle. Those are provided as Encoding subclasses. 2. The name objects created in step 1 are then used as the key into a dictionary (contained in the Font dictionary) whose values contain the PostScript instructions needed to actually paint the glyph.

        /* If none already exists, create one. */
        if (sf != null) {
            /* We don't care about encodings for SystemFonts. */
            fontUse = new FontUse4a(this, rfd, null);
        } else {
            final Encoding encoding = findEncoding(rfd, codePoint);
            if (encoding == null) {
                /* We can't encode this character.
                 * Return null so that the upstream font selection routines can
                 * try another font family. */
                return null;

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     * Finds the best encoding to use for a given Unicode code point.
     * @param codePoint The Unicode code point to be tested.
     * @return The best encoding to use for the code point.
     */
    private Encoding getBestEncoding(final int codePoint) {
        Encoding trialEncoding = null;
        final Encoding internalEncoding = this.font.getInternalEncoding();
        if (! (internalEncoding instanceof EncodingVector)) {
            /* CMap encodings should be able to handle any character in the
             * font's character set. */
            return internalEncoding;
        }
        /* Cast checked above. */
        final EncodingVector internalEncodingVector = (EncodingVector) internalEncoding;
        if (internalEncodingVector.getPredefinedType() == EncodingVector.Predefined.SYMBOL
                || internalEncodingVector.getPredefinedType() == EncodingVector.Predefined.ZAPF_DINGBATS) {
            /* The specialized encodings cover their entire character set. */
            return internalEncoding;
        }
        if (internalEncodingVector.getPredefinedType() == EncodingVector.Predefined.STANDARD) {
            final PsServer psServer = this.getFontConsumer().getFontServer().getPsServer();
            /* Try WinAnsiEncoding. */
            trialEncoding = psServer.getPredefinedEncoding(EncodingVector.Predefined.WIN_ANSI);
            if (trialEncoding.canEncode(codePoint)) {
                return trialEncoding;
            }
            /* Try the Central European encoding. */
            trialEncoding = psServer.getPredefinedEncoding(EncodingVector.Predefined.CE);
            if (trialEncoding.canEncode(codePoint)) {
                return trialEncoding;
            }
            /* Try the FOray catch-all encoding. */
            /* TODO: Move this encoding from the PS package to the Fonts package so that we don't have to address it
             * by name. */
            trialEncoding = psServer.getPredefinedEncoding("FOrayLatinExtraEncoding");
            if (trialEncoding != null
                    && trialEncoding.canEncode(codePoint)) {
                return trialEncoding;
            }
        }
        if (internalEncoding.canEncode(codePoint)) {
            return internalEncoding;
        }
        return null;
    }

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        }
        final FSTrueTypeFont ttf = (FSTrueTypeFont) getFOrayFont();
        if (this.fontUse.subSetting()) {
            return getSubsetCharsUsed();
        }
        final Encoding encoding = this.fontUse.getEncoding();
        final int arraySize = ttf.getNumGlyphs();
        final char[] charArray = new char[arraySize];
        for (int i = 0; i < ttf.getNumGlyphs(); i++) {
            final int arrayItem = encoding.decodeCharacter((char) i);
            charArray[i] = (char) arrayItem;
        }
        return charArray;
    }

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     * returns the chars used for the font subset.
     * @return The chars actually used by the document.
     */
    private char[] getSubsetCharsUsed() {
        final Subset subset = this.fontUse.getSubset();
        final Encoding encoding = this.fontUse.getEncoding();
        final char[] charArray = new char[subset.numGlyphsUsed()];
        for (int i = 0; i < subset.numGlyphsUsed(); i++) {
            final int originalGlyphIndex = subset.decodeSubsetIndex(i);
            final int codePoint = encoding.decodeCharacter(
                    (char) originalGlyphIndex);
            charArray[i] = (char) codePoint;
        }
        return charArray;
    }

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            if (subset == null) {
                return fsf.getWidths();
            }
            return getSubsetWidths();
        }
        final Encoding encoding = this.fontUse.getEncoding();
        final CharSet charSet = fsf.getCharSet();
        final int firstIndex = encoding.getFirstIndex();
        final int lastIndex = encoding.getLastIndex();
        final int size = lastIndex - firstIndex + 1;
        final short[] widthsByFontIndex = new short[size];
        for (int i = firstIndex; i <= lastIndex; i++) {
            // Decode the character for this index
            final int codePoint = encoding.decodeCharacter(i);
            // Find the charSet index for that character.
            final int charSetIndex = charSet.getIndex(codePoint);
            if (charSetIndex < 0) {
                continue;
            }

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        /* TODO: This method is untested */
        final FreeStandingFont fsf = this.consumerFont.getFreeStandingFont();
        if (fsf == null) {
            return;
        }
        final Encoding encoding = fsf.getInternalEncoding();


        /* Sort the content, using a bubble sort. */
         boolean stillSorting = true;
         while (stillSorting) {
             stillSorting = false;
             for (char i = 1; i < this.numGlyphsUsed(); i++) {
                 final char currentOriginalIndex =
                         (char) this.decodeSubsetIndex(i);
                 final int currentCodePoint = encoding.decodeCharacter(
                         currentOriginalIndex);
                 final char previousOriginalIndex
                         = (char) this.decodeSubsetIndex(i - 1);
                 final int previousCodePoint = encoding.decodeCharacter(
                         previousOriginalIndex);
                 if (previousCodePoint > currentCodePoint) {
                     /* They are out of order and should be switched. */


                     /* First, switch the originalBySubset array. */

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    private boolean isStandardFont() {
        /* This method is necessary to allow standard PDF fonts to be treated
         * as if they were not standard when they use a non-standard encoding.
         * We're not sure why this is necessary, but it seems to be. */
        if (this.fsFont.getFontUse().getFont().isPdfStandardFont()) {
            final Encoding encoding = this.fsFont.getFontUse().getEncoding();
            if (encoding.isPredefinedPdf()) {
                return true;
            }
            if (encoding == this.fsFont.getFontUse().getFont().getInternalEncoding()) {
                /* This covers the cases of Symbol & ZapfDingbats, which don't
                 * use standard PDF encodings. */

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        /* Get a List of all EncodingVectors used. */
        final List<EncodingVector> encodingsUsed
                = new ArrayList<EncodingVector>();
        for (int i = 0; i < fontUses.length; i++) {
            final Encoding encoding = fontUses[i].getEncoding();
            final Font font = fontUses[i].getFont();
            /* If the FontUse has the same encoding as the Font, there is no
             * need to write the encoding again, because it is already defined
             * in the Font dictionary itself. */
            if (encoding == font.getInternalEncoding()) {

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                rfd.getRegisteredFont().getFreeStandingFont();
        if (fsf == null) {
            return null;
        }
        final ConsumerFont4a consumerFont = this.getConsumerFont(fsf);
        final Encoding encoding = consumerFont.findEncoding(rfd, codePoint);
        if (encoding == null) {
            /* Either no known encoding for this font can encode this character
             * or we have been restricted from using an encoding that can.
             * Either way, this font can't be used. */
            return null;

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     * @throws FontException For errors during registration.
     */
    private void registerBase14Description(final String fontFamily,
            final String fontName, final org.axsl.font.Font.Style style,
            final org.axsl.font.Font.Weight weight) throws FontException {
        Encoding encoding = this.psServer.getPredefinedEncoding("WinAnsiEncoding");
        if (fontFamily.equals("Base14-Symbol")) {
            encoding = this.psServer.getPredefinedEncoding("SymbolEncoding");
        }
        if (fontFamily.equals("Base14-ZapfDingbats")) {
            encoding = this.psServer.getPredefinedEncoding("ZapfDingbatsEncoding");

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Related Classes of org.axsl.ps.Encoding

org.foray.font.ConsumerFont4a

org.foray.font.FontConsumer4a

org.foray.font.FontServer4a

org.foray.font.output.FontOutput4a

org.foray.font.Subset

org.foray.font.TestFont4a

org.foray.pdf.object.PDFFont

org.foray.render.ps.PSRenderer

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