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Rearranged predictor interface

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This commit is contained in:
sbarman 2011-06-17 13:32:26 -07:00
parent 4b6432b46c
commit 2170c2408b
1 changed files with 19 additions and 20 deletions
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39
pdf.js
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@ -232,23 +232,6 @@ var FlateStream = (function() {
]), 5];
function constructor(stream, params) {
if (IsDict(params)) {
var predType = params.get("Predictor");
if (predType && predType > 1) {
var colors = params.get("Colors");
if (!colors)
colors = 1;
var bpc = params.get("BitsPerComponent");
if (!bpc)
bpc = 8;
var cols = params.get("Columns");
if (!cols)
cols = 1;
this.pred = new FilterPredictor(this, predType, cols,
colors, bpc);
}
}
this.stream = stream;
this.dict = stream.dict;
var cmf = stream.getByte();
@ -1297,9 +1280,25 @@ var Parser = (function() {
},
makeFilter: function(stream, name, params) {
if (name == "FlateDecode" || name == "Fl") {
if (params)
error("params not supported yet for FlateDecode");
return new FlateStream(stream);
var flateStr = new FlateStream(stream);
if (IsDict(params)) {
var predType = params.get("Predictor");
if (predType && predType > 1) {
var colors = params.get("Colors");
if (!colors)
colors = 1;
var bpc = params.get("BitsPerComponent");
if (!bpc)
bpc = 8;
var cols = params.get("Columns");
if (!cols)
cols = 1;
flateStr = new FilterPredictor(flateStr, predType, cols,
colors, bpc);
}
}
return flateStr;
} else {
error("filter '" + name + "' not supported yet");
}