switch two glyphs

[ale.be...@gmail.com]

Hi all,

in the last week I've done some experiments with the SFNTLY library, but without having success ;)

I'm trying to switch two glyphs: let's say that I would like the glyph for the X char looks like an Y, and on the other hand that the Y looks like an X.

What I've done till now is:

Font.Builder fontBuilder = fontFactory.loadFontsForBuilding(new FileInputStream("myfont.ttf"))[0];

LocaTable.Builder locaTableBuilder = (LocaTable.Builder) fontBuilder.getTableBuilder(Tag.loca);

GlyphTable.Builder glyphTableBuilder = (GlyphTable.Builder) fontBuilder.getTableBuilder(Tag.glyf);

String x = "X";

String y = "Y";

int xI = new String(x).codePointAt(0); // 88

int yI = new String(y).codePointAt(0); // 89

ReadableFontData gRFD = glyphTableBuilder.data();

WritableFontData gWFD = WritableFontData.createWritableFontData(gRFD);

List<Integer> newLocaList = new ArrayList<Integer>();

int currOffset = 0;

for (int i = 0; i < locaTableBuilder.numGlyphs(); i++) {

newLocaList.add(currOffset);

int j = i;

if (i == xI) {

j = yI;

} else if (i == yI) {

j = xI;

}

int glyphLength = locaTableBuilder.glyphLength(j);

currOffset += glyphLength;

byte[] tmpBs = new byte[glyphLength];

gRFD.readBytes(j, tmpBs, 0, glyphLength);

gWFD.writeBytes(i, tmpBs);

}

locaTableBuilder.setLocaList(newLocaList);

glyphTableBuilder.setLoca(newLocaList);

fontBuilder.getTableBuilder(Tag.glyf).setData(gWFD);

fontBuilder.getTableBuilder(Tag.loca).setData(locaTableBuilder.data());

Font font = fontBuilder.build();

I'm sure to miss something ;)

Is there anybody can give me some hints on how to solve this issue?

Thanks,

AB