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Add the 'for' keyword and support 2's complement signed integer

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This commit is contained in:
Vivien Nicolas 2011-06-04 00:43:50 +02:00
parent a08691313f
commit c166db13fd
2 changed files with 33 additions and 14 deletions
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29
PDFFont.js
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@ -153,7 +153,11 @@ var Type1Parser = function(aAsciiStream, aBinaryStream) {
value = -((value - 251) * 256) - parseInt(aStream.getByte()) - 108;
count++;
} else {
error("Two complement signed integers are ignored for the moment");
var byte = aStream.getByte();
var high = (byte >> 1);
value = (byte - high) * 16777216 + aStream.getByte() * 65536 +
aStream.getByte() * 256 * + aStream.getByte();
count += 4;
}
charString.push(value);
@ -372,6 +376,17 @@ var Type1Parser = function(aAsciiStream, aBinaryStream) {
executionStack.push(bool ? procedure2 : procedure1);
break;
case "for":
var procedure = operandStack.pop();
var limit = operandStack.pop();
var increment = operandStack.pop();
var initial = operandStack.pop();
for (var i = 0; i < limit; i += increment) {
operandStack.push(i);
executionStack.push(procedure.slice());
}
break;
case "dup":
dump("duplicate: " + operandStack.peek());
operandStack.push(operandStack.peek());
@ -459,6 +474,12 @@ var Type1Parser = function(aAsciiStream, aBinaryStream) {
case "def":
var value = operandStack.pop();
var key = operandStack.pop();
if (key == "FontName" && Fonts.get(value)) {
// The font has already be decoded, stop!
return true;
}
dump("def: " + key + " = " + value);
dictionaryStack.peek().set(key, value);
break;
@ -573,14 +594,11 @@ var Type1Parser = function(aAsciiStream, aBinaryStream) {
};
var hack = true;
var Type1Font = function(aFontName, aFontFile) {
// All Type1 font program should begin with the comment %!
if (aFontFile.getByte() != 0x25 || aFontFile.getByte() != 0x21)
error("Invalid file header");
if (hack) {
var start = Date.now();
var ASCIIStream = aFontFile.makeSubStream(0, aFontFile.dict.get("Length1"), aFontFile.dict);
@ -591,8 +609,5 @@ var Type1Font = function(aFontName, aFontFile) {
var end = Date.now();
dump("Time to parse font is:" + (end - start));
hack = false;
}
};

4
pdf.js
View File

@ -2291,6 +2291,10 @@ var CanvasGraphics = (function() {
TODO("support Type3 font");
break;
case "TrueType":
TODO("implement TrueType support");
break;
default:
error("Unsupported font type: " + subtype);
break;