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Fix #3483 and simplify readCodingpasses()

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This commit is contained in:
fkaelberer 2014-04-16 21:40:37 +02:00
parent b33f4adf88
commit f52dfe4c81
1 changed files with 11 additions and 13 deletions
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24
src/core/jpx.js
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@ -135,7 +135,7 @@ var JpxImage = (function JpxImageClosure() {
var context = {};
try {
var position = start;
while (position < end) {
while (position + 1 < end) {
var code = readUint16(data, position);
position += 2;
@ -781,24 +781,22 @@ var JpxImage = (function JpxImageClosure() {
}
}
function readCodingpasses() {
var value = readBits(1);
if (value === 0) {
if (readBits(1) === 0) {
return 1;
}
value = (value << 1) | readBits(1);
if (value == 0x02) {
if (readBits(1) === 0) {
return 2;
}
value = (value << 2) | readBits(2);
if (value <= 0x0E) {
return (value & 0x03) + 3;
var value = readBits(2);
if (value < 3) {
return value + 3;
}
value = (value << 5) | readBits(5);
if (value <= 0x1FE) {
return (value & 0x1F) + 6;
value = readBits(5);
if (value < 31) {
return value + 6;
}
value = (value << 7) | readBits(7);
return (value & 0x7F) + 37;
value = readBits(7);
return value + 37;
}
var tileIndex = context.currentTile.index;
var tile = context.tiles[tileIndex];