mirrors/pdf.js
1
0
Fork 0
mirror of https://github.com/mozilla/pdf.js.git synced 2025-04-20 07:08:08 +02:00
Code Activity

fake stream for unimplemented filters

Browse source
This commit is contained in:
sbarman 2011-06-22 19:20:03 -07:00
parent 100d329804
commit 553250a5d2
1 changed files with 40 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

46
pdf.js
View file

@ -220,6 +220,43 @@ var DecodeStream = (function() {
})();
var FakeStream = (function() {
function constructor(stream) {
this.dict = stream.dict;
DecodeStream.call(this);
};
constructor.prototype = Object.create(DecodeStream.prototype);
constructor.prototype.readBlock = function() {
var bufferLength = this.bufferLength;
bufferLength += 1024;
var buffer = this.ensureBuffer(bufferLength);
this.bufferLength = bufferLength;
};
constructor.prototype.getBytes = function(length) {
var pos = this.pos;
if (length) {
this.ensureBuffer(pos + length);
var end = pos + length;
while (!this.eof && this.bufferLength < end)
this.readBlock();
var bufEnd = this.bufferLength;
if (end > bufEnd)
end = bufEnd;
} else {
this.eof = true;
var end = this.bufferLength;
}
this.pos = end;
return this.buffer.subarray(pos, end)
};
return constructor;
})();
var FlateStream = (function() {
const codeLenCodeMap = Uint32Array([
@ -597,9 +634,6 @@ var PredictorStream = (function() {
constructor.prototype = Object.create(DecodeStream.prototype);
constructor.prototype.readBlockTiff = function() {
var buffer = this.buffer;
var pos = this.pos;
var rowBytes = this.rowBytes;
var pixBytes = this.pixBytes;
@ -660,9 +694,6 @@ var PredictorStream = (function() {
this.bufferLength += rowBytes;
};
constructor.prototype.readBlockPng = function() {
var buffer = this.buffer;
var pos = this.pos;
var rowBytes = this.rowBytes;
var pixBytes = this.pixBytes;
@ -1448,6 +1479,9 @@ var Parser = (function() {
return new JpegStream(bytes, stream.dict);
} else if (name == "ASCII85Decode") {
return new Ascii85Stream(stream);
} else if (name == "CCITTFaxDecode") {
TODO("implement fax stream");
return new FakeStream(stream);
} else {
error("filter '" + name + "' not supported yet");
}