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More bit friendly decodeIAID and decodeInteger

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p01 2014-03-04 17:28:53 +01:00
parent e862c64bb8
commit 02a5f9435a
1 changed files with 3 additions and 3 deletions
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6
src/core/jbig2.js
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@ -105,7 +105,7 @@ var Jbig2Image = (function Jbig2ImageClosure() {
offset = 340;
break;
default:
v = v * 2 + bit;
v = ((v << 1) | bit) >>> 0;
if (--toRead === 0) {
state = 0;
}
@ -124,12 +124,12 @@ var Jbig2Image = (function Jbig2ImageClosure() {
var prev = 1;
for (var i = 0; i < codeLength; i++) {
var bit = decoder.readBit(contexts, prev);
prev = (prev * 2) + bit;
prev = (prev << 1) | bit;
}
if (codeLength < 31) {
return prev & ((1 << codeLength) - 1);
}
return prev - Math.pow(2, codeLength);
return prev & 0x7FFFFFFF;
}
// 7.3 Segment types