protected static String getKerningPairAsSVG(KerningPair kp, PostTable post) {
String leftGlyphName = post.getGlyphName(kp.getLeft());
String rightGlyphName = post.getGlyphName(kp.getRight());
StringBuffer sb = new StringBuffer();
// sb.append("<hkern ");
sb.append(XML_OPEN_TAG_START).append(SVG_HKERN_TAG).append(XML_SPACE);
if (leftGlyphName == null) {
sb.append(SVG_U1_ATTRIBUTE).append(XML_EQUAL_QUOT);
sb.append(kp.getLeft());
} else {
// sb.append("g1=\"");
sb.append(SVG_G1_ATTRIBUTE).append(XML_EQUAL_QUOT);
sb.append(leftGlyphName);
}
// sb.append("\" ");
sb.append(XML_CHAR_QUOT).append(XML_SPACE);
if (rightGlyphName == null) {
// sb.append("u2=\"");
sb.append(SVG_U2_ATTRIBUTE).append(XML_EQUAL_QUOT);
sb.append(kp.getRight());
} else {
// sb.append("g2=\"");
sb.append(SVG_G2_ATTRIBUTE).append(XML_EQUAL_QUOT);
sb.append(rightGlyphName);
}
// sb.append("\" k=\"");
sb.append(XML_CHAR_QUOT).append(XML_SPACE).append(SVG_K_ATTRIBUTE).append(XML_EQUAL_QUOT);
// SVG kerning values are inverted from TrueType's.
sb.append(-kp.getValue());
// sb.append("\"/>");
sb.append(XML_CHAR_QUOT).append(XML_OPEN_TAG_END_NO_CHILDREN);
return sb.toString();
}
/**
* Returns a <font>...</font> block, defining the specified font.
*
* @param font The TrueType font to be converted to SVG
* @param id An XML id attribute for the font element
* @param first The first character in the output range
* @param last The last character in the output range
* @param forceAscii Force the use of the ASCII character map
*/
protected static void writeFontAsSVGFragment(
PrintStream ps,
Font font,
String id,
int first,
int last,
boolean autoRange,
boolean forceAscii)
throws Exception {
// StringBuffer sb = new StringBuffer();
// int horiz_advance_x = font.getHmtxTable().getAdvanceWidth(
// font.getHheaTable().getNumberOfHMetrics() - 1);
int horiz_advance_x = font.getOS2Table().getAvgCharWidth();
ps.print(XML_OPEN_TAG_START);
ps.print(SVG_FONT_TAG);
ps.print(XML_SPACE);
// ps.print("<font ");
if (id != null) {
ps.print(SVG_ID_ATTRIBUTE);
ps.print(XML_EQUAL_QUOT);
// ps.print("id=\"");
ps.print(id);
ps.print(XML_CHAR_QUOT);
ps.print(XML_SPACE);
// ps.print("\" ");
}
ps.print(SVG_HORIZ_ADV_X_ATTRIBUTE);
ps.print(XML_EQUAL_QUOT);
// ps.print("horiz-adv-x=\"");
ps.print(horiz_advance_x);
ps.print(XML_CHAR_QUOT);
ps.print(XML_OPEN_TAG_END_CHILDREN);
// ps.println("\">");
ps.print(getSVGFontFaceElement(font));
// Decide upon a cmap table to use for our character to glyph look-up
CmapFormat cmapFmt = null;
if (forceAscii) {
// We've been asked to use the ASCII/Macintosh cmap format
cmapFmt = font.getCmapTable().getCmapFormat(Table.platformMacintosh, Table.encodingRoman);
} else {
// The default behaviour is to use the Unicode cmap encoding
cmapFmt = font.getCmapTable().getCmapFormat(Table.platformMicrosoft, Table.encodingUGL);
if (cmapFmt == null) {
// This might be a symbol font, so we'll look for an "undefined" encoding
cmapFmt =
font.getCmapTable().getCmapFormat(Table.platformMicrosoft, Table.encodingUndefined);
}
}
if (cmapFmt == null) {
throw new Exception("Cannot find a suitable cmap table");
}
// If this font includes arabic script, we want to specify
// substitutions for initial, medial, terminal & isolated
// cases.
GsubTable gsub = (GsubTable) font.getTable(Table.GSUB);
SingleSubst initialSubst = null;
SingleSubst medialSubst = null;
SingleSubst terminalSubst = null;
if (gsub != null) {
Script s = gsub.getScriptList().findScript(SCRIPT_TAG_ARAB);
if (s != null) {
LangSys ls = s.getDefaultLangSys();
if (ls != null) {
Feature init = gsub.getFeatureList().findFeature(ls, FEATURE_TAG_INIT);
Feature medi = gsub.getFeatureList().findFeature(ls, FEATURE_TAG_MEDI);
Feature fina = gsub.getFeatureList().findFeature(ls, FEATURE_TAG_FINA);
if (init != null) {
initialSubst = (SingleSubst) gsub.getLookupList().getLookup(init, 0).getSubtable(0);
}
if (medi != null) {
medialSubst = (SingleSubst) gsub.getLookupList().getLookup(medi, 0).getSubtable(0);
}
if (fina != null) {
terminalSubst = (SingleSubst) gsub.getLookupList().getLookup(fina, 0).getSubtable(0);
}
}
}
}
// Include the missing glyph
ps.println(
getGlyphAsSVG(
font,
font.getGlyph(0),
0,
horiz_advance_x,
initialSubst,
medialSubst,
terminalSubst,
""));
try {
if (first == -1) {
if (!autoRange) first = DEFAULT_FIRST;
else first = cmapFmt.getFirst();
}
if (last == -1) {
if (!autoRange) last = DEFAULT_LAST;
else last = cmapFmt.getLast();
}
// Include our requested range
Set glyphSet = new HashSet();
for (int i = first; i <= last; i++) {
int glyphIndex = cmapFmt.mapCharCode(i);
// ps.println(String.valueOf(i) + " -> " + String.valueOf(glyphIndex));
// if (font.getGlyphs()[glyphIndex] != null)
// sb.append(font.getGlyphs()[glyphIndex].toString() + "\n");
if (glyphIndex > 0) {
// add glyph ID to set so we can filter later
glyphSet.add(glyphIndex);
ps.println(
getGlyphAsSVG(
font,
font.getGlyph(glyphIndex),
glyphIndex,
horiz_advance_x,
initialSubst,
medialSubst,
terminalSubst,
(32 <= i && i <= 127)
? encodeEntities(String.valueOf((char) i))
: XML_CHAR_REF_PREFIX + Integer.toHexString(i) + XML_CHAR_REF_SUFFIX));
}
}
// Output kerning pairs from the requested range
KernTable kern = (KernTable) font.getTable(Table.kern);
if (kern != null) {
KernSubtable kst = kern.getSubtable(0);
PostTable post = (PostTable) font.getTable(Table.post);
for (int i = 0; i < kst.getKerningPairCount(); i++) {
KerningPair kpair = kst.getKerningPair(i);
// check if left and right are both in our glyph set
if (glyphSet.contains(kpair.getLeft()) && glyphSet.contains(kpair.getRight())) {
ps.println(getKerningPairAsSVG(kpair, post));
}
}
}
} catch (Exception e) {
System.err.println(e.getMessage());
}
ps.print(XML_CLOSE_TAG_START);
ps.print(SVG_FONT_TAG);
ps.println(XML_CLOSE_TAG_END);
// ps.println("</font>");
}
