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make lengthDecode a typed array

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Andreas Gal 2011-06-04 10:18:04 -07:00
parent cd7c229ccc
commit 9143ad4cf5
1 changed files with 10 additions and 35 deletions
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pdf.js
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@ -116,39 +116,13 @@ var FlateStream = (function() {
16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
]); ]);
const lengthDecode = [ const lengthDecode = new Uint32Array([
[0, 3], 0x00003, 0x00004, 0x00005, 0x00006, 0x00007, 0x00008, 0x00009,
[0, 4], 0x0000a, 0x1000b, 0x1000d, 0x1000f, 0x10011, 0x20013, 0x20017,
[0, 5], 0x2001b, 0x2001f, 0x30023, 0x3002b, 0x30033, 0x3003b, 0x40043,
[0, 6], 0x40053, 0x40063, 0x40073, 0x50083, 0x500a3, 0x500c3, 0x500e3,
[0, 7], 0x00102, 0x00102, 0x00102
[0, 8], ]);
[0, 9],
[0, 10],
[1, 11],
[1, 13],
[1, 15],
[1, 17],
[2, 19],
[2, 23],
[2, 27],
[2, 31],
[3, 35],
[3, 43],
[3, 51],
[3, 59],
[4, 67],
[4, 83],
[4, 99],
[4, 115],
[5, 131],
[5, 163],
[5, 195],
[5, 227],
[0, 258],
[0, 258],
[0, 258]
];
const distDecode = [ const distDecode = [
[0, 1], [0, 1],
@ -964,10 +938,11 @@ var FlateStream = (function() {
buffer[pos++] = code1; buffer[pos++] = code1;
} else { } else {
code1 -= 257; code1 -= 257;
var code2 = lengthDecode[code1][0]; code1 = lengthDecode[code1];
var code2 = code1 >> 16;
if (code2 > 0) if (code2 > 0)
code2 = this.getBits(code2); code2 = this.getBits(code2);
var len = lengthDecode[code1][1] + code2; var len = (code1 & 0xffff) + code2;
code1 = this.getCode(distCodeTable); code1 = this.getCode(distCodeTable);
code2 = distDecode[code1][0]; code2 = distDecode[code1][0];
if (code2 > 0) if (code2 > 0)