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Add support for stemHW/stemVW/stemSnapH/stemSnapV

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This commit is contained in:
Vivien Nicolas 2011-07-01 11:28:22 +02:00
parent 22264c07c8
commit 63e4f0293f
1 changed files with 54 additions and 24 deletions
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78
fonts.js
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@ -1335,6 +1335,18 @@ var Type1Parser = function() {
* Returns an object containing a Subrs array and a CharStrings array
* extracted from and eexec encrypted block of data
*/
function readNumberArray(str, index) {
var start = ++index;
var count = 0;
while (str[index++] != "]")
count++;
var array = str.substr(start, count).split(" ");
for (var i = 0; i < array.length; i++)
array[i] = parseFloat(array[i] || 0);
return array;
};
this.extractFontProgram = function t1_extractFontProgram(stream) {
var eexec = decrypt(stream, kEexecEncryptionKey, 4);
var eexecString = "";
@ -1344,7 +1356,11 @@ var Type1Parser = function() {
var glyphsSection = false, subrsSection = false;
var extracted = {
subrs: [],
charstrings: []
charstrings: [],
properties: {
stemSnapH: [0, 0],
stemSnapV: [0, 0]
}
};
var glyph = "";
@ -1372,14 +1388,32 @@ var Type1Parser = function() {
extracted.subrs.push(str.charstring);
}
i += length + 3;
} else if (c == " ") {
} else if (c == " " || c == "\n") {
length = parseInt(token);
token = "";
} else {
token += c;
if (!glyphsSection) {
glyphsSection = token.indexOf("/CharString") != -1;
subrsSection = subrsSection || token.indexOf("Subrs") != -1;
switch (token) {
case "/CharString":
glyphsSection = true;
break;
case "/Subrs":
subrsSection = true;
break;
case "/StdHW":
extracted.properties.stdHW = readNumberArray(eexecString, i + 2)[0];
break;
case "/StdVW":
extracted.properties.stdVW = readNumberArray(eexecString, i + 2)[0];
break;
case "/StemSnapH":
extracted.properties.stemSnapH = readNumberArray(eexecString, i + 2);
break;
case "/StemSnapV":
extracted.properties.stemSnapV = readNumberArray(eexecString, i + 2);
break;
}
} else if (c == "/") {
token = glyph = "";
while ((c = eexecString[++i]) != " ")
@ -1400,18 +1434,6 @@ var Type1Parser = function() {
textMatrix: null
};
function readNumberArray(str, index) {
var start = ++index;
var count = 0;
while ((c = str[index++]) != "]")
count++;
var array = str.substr(start, count).split(" ");
for (var i = 0; i < array.length; i++)
array[i] = parseFloat(array[i]);
return array;
};
var token = "";
var count = headerString.length;
for (var i = 0; i < count; i++) {
@ -1439,7 +1461,6 @@ var Type1Parser = function() {
return info;
};
};
/**
@ -1513,13 +1534,14 @@ var CFF = function(name, file, properties) {
var headerBlock = file.getBytes(length1);
var header = type1Parser.extractFontHeader(headerBlock);
for (var info in header) {
for (var info in header)
properties[info] = header[info];
}
// Decrypt the data blocks and retrieve it's content
var eexecBlock = file.getBytes(length2);
var data = type1Parser.extractFontProgram(eexecBlock);
for (var info in data.properties)
properties[info] = data.properties[info];
var charstrings = this.getOrderedCharStrings(data.charstrings);
var type2Charstrings = this.getType2Charstrings(charstrings);
@ -1758,14 +1780,22 @@ CFF.prototype = {
"charstrings": this.createCFFIndexHeader([[0x8B, 0x0E]].concat(glyphs), true),
"private": (function(self) {
log(properties.stemSnapH);
var data =
"\x8b\x14" + // defaultWidth
"\x8b\x15" + // nominalWidth
"\x8b\x0a" + // StdHW
"\x8b\x0a" + // StdVW
"\x8b\x8b\x0c\x0c" + // StemSnapH
"\x8b\x8b\x0c\x0d"; // StemSnapV
self.encodeNumber(properties.stdHW) + "\x0a" + // StdHW
self.encodeNumber(properties.stdVW) + "\x0b"; // StdVW
var stemH = properties.stemSnapH;
for (var i = 0; i < stemH.length; i++)
data += self.encodeNumber(stemH[i]);
data += "\x0c\x0c"; // StemSnapH
var stemV = properties.stemSnapV;
for (var i = 0; i < stemV.length; i++)
data += self.encodeNumber(stemV[i]);
data += "\x0c\x0d"; // StemSnapV
data += self.encodeNumber(data.length + 4) + "\x13"; // Subrs offset
return data;