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Merge pull request #4637 from fkaelberer/issue3483

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Fix #3483 and simplify readCodingpasses()
This commit is contained in:
Yury Delendik 2014-04-17 08:29:59 -05:00
commit 558c159e3d
1 changed files with 11 additions and 13 deletions
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24
src/core/jpx.js
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@ -132,7 +132,7 @@ var JpxImage = (function JpxImageClosure() {
var context = {}; var context = {};
try { try {
var position = start; var position = start;
while (position < end) { while (position + 1 < end) {
var code = readUint16(data, position); var code = readUint16(data, position);
position += 2; position += 2;
@ -763,24 +763,22 @@ var JpxImage = (function JpxImageClosure() {
} }
} }
function readCodingpasses() { function readCodingpasses() {
var value = readBits(1); if (readBits(1) === 0) {
if (value === 0) {
return 1; return 1;
} }
value = (value << 1) | readBits(1); if (readBits(1) === 0) {
if (value == 0x02) {
return 2; return 2;
} }
value = (value << 2) | readBits(2); var value = readBits(2);
if (value <= 0x0E) { if (value < 3) {
return (value & 0x03) + 3; return value + 3;
} }
value = (value << 5) | readBits(5); value = readBits(5);
if (value <= 0x1FE) { if (value < 31) {
return (value & 0x1F) + 6; return value + 6;
} }
value = (value << 7) | readBits(7); value = readBits(7);
return (value & 0x7F) + 37; return value + 37;
} }
var tileIndex = context.currentTile.index; var tileIndex = context.currentTile.index;
var tile = context.tiles[tileIndex]; var tile = context.tiles[tileIndex];