Sakurai/pdf.js
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work in progress on ascii85

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sbarman 2011-06-21 21:26:48 -07:00
parent 3603981581
commit 745745ccd0
1 changed files with 48 additions and 9 deletions
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53
pdf.js
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@ -774,20 +774,57 @@ var Ascii85Stream = (function() {
return this.buffer = buffer2;
},
getByte: function() {
while (this.pos >= this.bufferLength)
var pos = this.pos;
while (this.bufferLength <= pos) {
if (this.eof)
return;
this.readBlock();
}
return this.buffer[this.pos++];
},
getBytes: function(n) {
if (n) {
while (this.bufferLength < n || !this.eof)
getBytes: function(length) {
var pos = this.pos;
this.ensureBuffer(pos + length);
if (length) {
while (!this.eof && this.bufferLength < pos + length)
this.readBlock();
return this.buffer.subarray(0, n);
var end = pos + length;
var bufEnd = this.bufferLength;
if (end > bufEnd)
end = bufEnd;
} else {
while(!this.eof)
this.readBlock();
return this.buffer;
var end = this.bufferLength;
}
this.pos = end;
return this.buffer.subarray(pos, end)
},
lookChar: function() {
var pos = this.pos;
while (this.bufferLength <= pos) {
if (this.eof)
return;
this.readBlock();
}
return String.fromCharCode(this.buffer[this.pos]);
},
getChar: function() {
var pos = this.pos;
while (this.bufferLength <= pos) {
if (this.eof)
return;
this.readBlock();
}
return String.fromCharCode(this.buffer[this.pos++]);
},
skip: function(n) {
if (!n)
n = 1;
this.pos += n;
},
readBlock: function() {
const tildaCode = "~".charCodeAt(0);
@ -840,7 +877,7 @@ var Ascii85Stream = (function() {
t = t * 85 + (input[i] - 0x21);
for (var i = 3; i >= 0; --i){
buffer[bufferLength++] = t & 0xFF;
buffer[bufferLength + i] = t & 0xFF;
t >>= 8;
}
}
@ -1712,6 +1749,8 @@ var XRef = (function() {
return this.fetch(obj);
},
fetch: function(ref) {
if (!ref)
console.trace();
var num = ref.num;
var e = this.cache[num];
if (e)