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Implement Handling of Named Glyphs during BDF Import/Export #62

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Implement Handling of Named Glyphs during BDF Import/Export #62

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b3ee347
import named glyphs from BDF
molarmanful Dec 28, 2024
a770353
spaces -> tabs
molarmanful Dec 28, 2024
c680494
export named glyphs to BDF
molarmanful Dec 28, 2024
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53 changes: 30 additions & 23 deletions main/java/BitsNPicas/src/com/kreative/bitsnpicas/exporter/BDFBitmapFontExporter.java
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Original file line number Diff line number Diff line change
Expand Up @@ -92,33 +92,40 @@ private void exportFont(BitmapFont font, PrintWriter pw) {
BitmapFontGlyph g = font.getCharacter(i);
String h = Integer.toHexString(i).toUpperCase();
while (h.length() < 4) h = "0" + h;
pw.println("STARTCHAR U+" + h);
pw.println("ENCODING " + i);
pw.println("SWIDTH " + (1000 * g.getCharacterWidth() / (bbr-bbl)) + " 0");
pw.println("DWIDTH " + g.getCharacterWidth() + " 0");
pw.println("BBX " + g.getGlyphWidth() + " " + g.getGlyphHeight() + " " + g.getGlyphOffset() + " " + (-g.getGlyphDescent()));
pw.println("BITMAP");
for (byte[] row : g.getGlyph()) {
StringBuffer s = new StringBuffer();
for (int col = 0; col < row.length; col += 8) {
int b = 0;
for (int c = 0; c < 8; c++) {
b <<= 1;
if (col+c < row.length && row[col+c] < 0) {
b |= 1;
}
}
String bh = "00" + Integer.toHexString(b).toUpperCase();
bh = bh.substring(bh.length() - 2);
s.append(bh);
writeChar(pw, g, "U+" + h, i, bbl, bbr);
}
}
for (String name : font.namedGlyphs(false).keySet()) {
writeChar(pw, font.getNamedGlyph(name), name, -1, bbl, bbr);
}
pw.println("ENDFONT");
}

private void writeChar(PrintWriter pw, BitmapFontGlyph g, String name, int i, int bbl, int bbr) {
pw.println("STARTCHAR " + name);
pw.println("ENCODING " + i);
pw.println("SWIDTH " + (1000 * g.getCharacterWidth() / (bbr-bbl)) + " 0");
pw.println("DWIDTH " + g.getCharacterWidth() + " 0");
pw.println("BBX " + g.getGlyphWidth() + " " + g.getGlyphHeight() + " " + g.getGlyphOffset() + " " + (-g.getGlyphDescent()));
pw.println("BITMAP");
for (byte[] row : g.getGlyph()) {
StringBuffer s = new StringBuffer();
for (int col = 0; col < row.length; col += 8) {
int b = 0;
for (int c = 0; c < 8; c++) {
b <<= 1;
if (col+c < row.length && row[col+c] < 0) {
b |= 1;
}
if (s.length() == 0) s.append("00");
pw.println(s.toString());
}
pw.println("ENDCHAR");
String bh = "00" + Integer.toHexString(b).toUpperCase();
bh = bh.substring(bh.length() - 2);
s.append(bh);
}
if (s.length() == 0) s.append("00");
pw.println(s.toString());
}
pw.println("ENDFONT");
pw.println("ENDCHAR");
}

private static String enquote(String s) {
Expand Down
5 changes: 3 additions & 2 deletions main/java/BitsNPicas/src/com/kreative/bitsnpicas/importer/BDFBitmapFontImporter.java
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Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,7 @@ private BitmapFont readFont(Scanner scan) throws IOException {
Charset cs = null;
while (scan.hasNextLine()) {
String[] kv = scan.nextLine().trim().split("\\s+", 2);
if (kv[0].equals("STARTCHAR")) readChar(scan, bm, cs);
if (kv[0].equals("STARTCHAR")) readChar(scan, bm, cs, kv[1]);
else if (kv[0].equals("ENDFONT")) break;
else if (kv.length < 2) continue;
else if (kv[0].equals("FAMILY_NAME")) bm.setName(Font.NAME_FAMILY, dequote(kv[1]));
Expand Down Expand Up @@ -109,7 +109,7 @@ else if (kv[0].equals("CHARSET_REGISTRY")) {
return bm;
}

private void readChar(Scanner scan, BitmapFont bm, Charset cs) throws IOException {
private void readChar(Scanner scan, BitmapFont bm, Charset cs, String gn) throws IOException {
BitmapFontGlyph g = new BitmapFontGlyph();
int encoding = -1;
while (scan.hasNextLine()) {
Expand Down Expand Up @@ -154,6 +154,7 @@ else if (kv[0].equals("BBX")) {
}
}
if (encoding >= 0) bm.putCharacter(encoding, g);
else bm.putNamedGlyph(gn, g);
}

private boolean readBitmap(Scanner scan, BitmapFontGlyph g) {
Expand Down