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Support reading all parts of a Type2 file

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This commit is contained in:
Vivien Nicolas 2011-06-09 00:26:41 +02:00
parent 87b4cb85be
commit 714571dc80
2 changed files with 150 additions and 15 deletions
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89
PDFFont.js
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@ -664,7 +664,7 @@ var Type1Font = function(aFontName, aFontFile) {
/**************************************************************************/
function decodeType2DictData(aString, aDictionary, aHack) {
function decodeType2DictData(aString, aDictionary, aHack, aUseRealNumber) {
var data = [];
var value = "";
@ -672,8 +672,6 @@ function decodeType2DictData(aString, aDictionary, aHack) {
for (var i = 0; i < count; i) {
value = aString[i++];
if (value <= 0) {
data.push(value);
continue;
} else if (value == 28) {
value = aString[i++] << 8 | aString[i++];
} else if (value == 29) {
@ -681,22 +679,72 @@ function decodeType2DictData(aString, aDictionary, aHack) {
aString[i++] << 16 |
aString[i++] << 8 |
aString[i++];
} else if (aUseRealNumber && value == 30) {
value = "";
var done = false;
while (!done) {
var byte = aString[i++];
var nibbles = [parseInt(byte / 16), parseInt(byte % 16)];
for (var j = 0; j < nibbles.length; j++) {
var nibble = nibbles[j];
dump(nibble + "\n");
switch (nibble) {
case 0x0:
case 0x1:
case 0x2:
case 0x3:
case 0x4:
case 0x5:
case 0x6:
case 0x7:
case 0x8:
case 0x9:
value += nibble;
break;
case 0xA:
value += ".";
break;
case 0xB:
value += "E";
break;
case 0xC:
value += "E-";
break;
case 0xD:
break;
case 0xE:
value += "-";
break;
case 0xF:
done = true;
break;
default:
error(nibble + " is unssuported");
break;
}
}
};
value = parseFloat(value);
} else if (value < 32) {
var oldValue = value;
if (value == 12) {
value = aDictionary["12"][aString[i++]];
} else {
} else if (aDictionary[value]) {
value = aDictionary[value];
} else {
error(value + " is an invalid command number");
}
if (!value)
throw new Error("This command number does not match anything : " + oldValue);
value = aHack ? value.name : value;
} else if (value <= 246) {
value = parseInt(value) - 139;
} else if (value <= 250) {
value = ((value - 247) * 256) + parseInt(aString[i++]) + 108;
value = ((value - 247) * 256) + aString[i++] + 108;
} else if (value <= 254) {
value = -((value - 251) * 256) - parseInt(aString[i++]) - 108;
value = -((value - 251) * 256) - aString[i++] - 108;
} else if (value == 255) {
var byte = aString[i++];
var high = (byte >> 1);
value = (byte - high) << 24 | aString[i++] << 16 |
aString[i++] << 8 | aString[i];
} else {
throw new Error("Value should not be 255");
}
@ -780,8 +828,8 @@ var Type2Parser = function(aFilePath) {
break;
case "number number":
font.set(token.name, {
size: stack.pop(),
offset: stack.pop()
offset: stack.pop(),
size: stack.pop()
});
break;
case "boolean":
@ -859,16 +907,19 @@ var Type2Parser = function(aFilePath) {
for (var i = 0; i < count; i++)
parseAsToken(topDict[i], CFFDictOps);
var topDictOffset = aStream.pos;
for (var p in font.map)
dump(p + "::" + font.get(p));
// Read the Subr Index
// Read the Global Subr Index that comes just after the Strings Index
// (cf. "The Compact Font Format Specification" Chapter 16)
dump("Reading Subr Index");
var subrs = readIndex(aStream);
// Read CharStrings Index
dump("Read CharStrings Index");
var charStringsOffset = font.get("CharStrings");
dump("Read CharStrings Index (offset: " + charStringsOffset + ")");
aStream.pos = charStringsOffset;
var charStrings = readIndex(aStream, true);
@ -885,8 +936,16 @@ var Type2Parser = function(aFilePath) {
var charset = readCharset(aStream, charStrings);
}
// Read Encoding data
log("Reading encoding data");
// Reading Private Dict
var private = font.get("Private");
log("Reading Private Dict (offset: " + private.offset + " size: " + private.size + ")");
aStream.pos = private.offset;
var privateDict = [];
for (var i = 0; i < private.size; i++)
privateDict.push(aStream.getByte());
log(privateDict);
log(decodeType2DictData(privateDict, CFFDictPrivate, true, true));
}
};

76
cffStandardStrings.js
View File

@ -697,3 +697,79 @@ var CFFDictCommands = {
}
};
var CFFDictPrivate = {
"6": {
name: "BluesValues",
operand: "delta"
},
"7": {
name: "OtherBlues",
operand: "delta"
},
"8": {
name: "FamilyBlues",
operand: "delta"
},
"9": {
name: "FamilyOtherBlues",
operand: "delta"
},
"10": {
name: "StdHW",
operand: null
},
"11": {
name: "StdVW",
operand: null
},
"12": {
"9": {
name: "BlueScale",
operand: 0.039625
},
"10": {
name: "BlueShift",
operand: 7
},
"11": {
name: "BlueFuzz",
operand: 1
},
"12": {
name: "StemSnapH",
operand: "delta"
},
"13": {
name: "StemSnapV",
operand: "delta"
},
"14": {
name: "ForceBold",
operand: "boolean"
},
"17": {
name: "LanguageGroup",
operand: 0
},
"18": {
name: "ExpansionFactor",
operand: 0.06
},
"19": {
name: "initialRandomSeed",
operand: 0
}
},
"19": {
name: "Subrs",
operand: null
},
"20": {
name: "defaultWidthX",
operand: 0
},
"21": {
name: "nominalWidthX",
operand: 0
}
};