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Give a shot at passing better information to hmtx (hinting is slightly broken)

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Vivien Nicolas 2011-06-28 00:11:53 +02:00
parent 798d7a10ca
commit 61da963dae
1 changed files with 46 additions and 17 deletions
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63
fonts.js
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@ -182,7 +182,16 @@ var Font = (function () {
return array;
};
function string16(value) {
function string16(value, signed) {
if (signed && value < 0) {
value = Math.abs(value);
var byte = (value >> 8) & 0xff;
return String.fromCharCode(byte ^ 0xff) +
String.fromCharCode(value & 0xff);
} else if (signed) {
return String.fromCharCode((value >> 7) & 0xff) +
String.fromCharCode(value & 0xff);
}
return String.fromCharCode((value >> 8) & 0xff) +
String.fromCharCode(value & 0xff);
};
@ -732,10 +741,8 @@ var Font = (function () {
*/
hmtx = "\x01\xF4\x00\x00"; // Fake .notdef
var width = 0, lsb = 0;
for (var i = 0; i < charstrings.length; i++) {
width = charstrings[i].charstring[0];
hmtx += string16(width) + string16(lsb);
}
for (var i = 0; i < charstrings.length; i++)
hmtx += string16(charstrings[i].width) + string16(charstrings[i].lsb);
hmtx = stringToArray(hmtx);
createTableEntry(otf, offsets, "hmtx", hmtx);
@ -832,14 +839,14 @@ var Font = (function () {
*/
var FontsUtils = {
_bytesArray: new Uint8Array(4),
integerToBytes: function fu_integerToBytes(value, bytesCount) {
integerToBytes: function fu_integerToBytes(value, bytesCount, signed) {
var bytes = this._bytesArray;
if (bytesCount == 1) {
bytes.set([value]);
return bytes[0];
} else if (bytesCount == 2) {
bytes.set([value >> 8, value]);
bytes.set([value >> 8, value & 0xff]);
return [bytes[0], bytes[1]];
} else if (bytesCount == 4) {
bytes.set([value >> 24, value >> 16, value >> 8, value]);
@ -1005,6 +1012,8 @@ var Type1Parser = function() {
function decodeCharString(array) {
var charstring = [];
var lsb = 0;
var width = 0;
var z = 0;
var value = "";
@ -1043,14 +1052,30 @@ var Type1Parser = function() {
} else {
// TODO Clean this code
Gindex = Gindex || 1;
if (value == 13) {
var charWidthVector = charstring[1];
var leftSidebearing = charstring[0];
charstring.push(leftSidebearing, "hmoveto");
width = charstring[1];
lsb = charstring[0];
//charstring.push(lsb, "hmoveto");
charstring.splice(0, 1);
continue;
} else if (0 && lsb && value == 1) { // hstem
charstring[Gindex] += lsb;
lsb = 0;
} else if (0 && lsb && value == 22) { // hmoveto
error("hmoveto: " + charstring[Gindex]);
charstring[Gindex] += lsb;
lsb = 0;
} else if (0 && lsb && value == 14) { // enchar
var p = charstring[Gindex];
if (IsNum(p)) {
charstring[Gindex] += lsb;
} else {
charstring.splice(Gindex + 1, 0, lsb);
}
lsb = 0;
}
var Gindex = charstring.length;
command = charStringDictionary[value];
}
@ -1080,7 +1105,7 @@ var Type1Parser = function() {
charstring.push(value);
}
return charstring;
return { charstring: charstring, width: width, lsb: lsb };
};
/**
@ -1107,19 +1132,21 @@ var Type1Parser = function() {
length = parseInt(length);
var data = eexecString.slice(i + 3, i + 3 + length);
var encodedSubr = decrypt(data, kCharStringsEncryptionKey, 4);
var subr = decodeCharString(encodedSubr);
var str = decodeCharString(encodedSubr);
subrs.push(subr);
subrs.push(str.charstring);
i += 3 + length;
} else if (inGlyphs && c == 0x52) {
length = parseInt(length);
var data = eexecString.slice(i + 3, i + 3 + length);
var encodedCharstring = decrypt(data, kCharStringsEncryptionKey, 4);
var subr = decodeCharString(encodedCharstring);
var str = decodeCharString(encodedCharstring);
glyphs.push({
glyph: glyph,
data: subr
data: str.charstring,
lsb: str.lsb,
width: str.width
});
i += 3 + length;
} else if (inGlyphs && c == 0x2F) {
@ -1290,7 +1317,9 @@ CFF.prototype = {
charstrings.push({
glyph: glyph,
unicode: unicode,
charstring: glyphs[i].data
charstring: glyphs[i].data,
width: glyphs[i].width,
lsb: glyphs[i].lsb
});
}
};