Sakurai/pdf.js
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Updating PartialEvaluator.eval syntax for better performance

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Saebekassebil 2011-07-18 12:09:26 +02:00
parent 0f58bf9247
commit d56cc9c5e8
1 changed files with 13 additions and 28 deletions
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pdf.js
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@ -3561,23 +3561,9 @@ var PartialEvaluator = (function() {
eval: function(stream, xref, resources, fonts) {
resources = xref.fetchIfRef(resources) || new Dict();
var xobjs = xref.fetchIfRef(resources.get('XObject')) || new Dict();
var parser = new Parser(new Lexer(stream), false);
var objpool = [];
function emitArg(arg) {
if (typeof arg == 'object' || typeof arg == 'string') {
var index = objpool.length;
objpool[index] = arg;
return 'objpool[' + index + ']';
}
return arg;
}
var src = '';
var args = [];
var obj;
var args = [], argsArray = [], fnArray = [], obj;
while (!IsEOF(obj = parser.getObj())) {
if (IsCmd(obj)) {
var cmd = obj.cmd;
@ -3600,9 +3586,9 @@ var PartialEvaluator = (function() {
if ('Form' == type.name) {
args[0].code = this.eval(xobj,
xref,
xobj.dict.get('Resources'),
fonts);
xref,
xobj.dict.get('Resources'),
fonts);
}
}
} else if (cmd == 'Tf') { // eagerly collect all fonts
@ -3622,21 +3608,20 @@ var PartialEvaluator = (function() {
}
}
src += 'this.';
src += fn;
src += '(';
src += args.map(emitArg).join(',');
src += ');\n';
args.length = 0;
fnArray.push(fn);
argsArray.push(args);
args = [];
} else {
assertWellFormed(args.length <= 33, 'Too many arguments');
args.push(obj);
}
}
var fn = Function('objpool', src);
return function(gfx) { fn.call(gfx, objpool); };
return function(gfx) {
for(var i = 0, length = argsArray.length; i < length; i++) {
gfx[fnArray[i]].apply(gfx, argsArray[i]);
}
}
},
translateFont: function(fontDict, xref, resources) {