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faxstream compiles

sbarman 14 years ago
parent
bf6f32baa8
commit
8c3f5df3be
1 changed files with 128 additions and 120 deletions
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  1. 248
      pdf.js

248
pdf.js
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@ -1315,7 +1315,7 @@ var CCITTFaxStream = (function() { @@ -1315,7 +1315,7 @@ var CCITTFaxStream = (function() {
this.codingLine = new Uint8Array(this.columns + 1);
this.codingLine[0] = this.columns;
this.a0i = 0;
this.codingPos = 0;
this.refLine = new Uint8Array(this.columns + 2);
this.row = 0;
@ -1342,52 +1342,60 @@ var CCITTFaxStream = (function() { @@ -1342,52 +1342,60 @@ var CCITTFaxStream = (function() {
constructor.prototype = Object.create(DecodeStream.prototype);
constructor.prototype.readBlock = function() {
while (!this.eof) {
var c = this.lookChar();
this.buf = EOF;
if (this.bufferLength <= this.pos)
this.ensureBuffer(this.pos + 1);
this.buffer[this.pos++] = c;
}
};
constructor.prototype.addPixels(a1, blackPixels) {
constructor.prototype.addPixels = function(a1, blackPixels) {
var codingLine = this.codingLine;
var a0i = this.a0i;
var codingPos = this.codingPos;
if (a1 > codingLine[a0i]) {
if (a1 > codingLine[codingPos]) {
if (a1 > this.columns)
error("row is wrong length");
if (a0i & 1) ^ blackPixels) {
++a0i;
this.a0i = a0i;
if ((codingPos & 1) ^ blackPixels) {
++codingPos;
this.codingPos = codingPos;
}
codingLine[a0i] = a1;
codingLine[codingPos] = a1;
}
};
constructor.prototype.addPixelsNeg(a1, blackPixels) {
constructor.prototype.addPixelsNeg = function(a1, blackPixels) {
var codingLine = this.codingLine;
var a0i = this.a0i;
var codingPos = this.codingPos;
if (a1 > codingLine[a0i]) {
if (a1 > codingLine[codingPos]) {
if (a1 > this.columns)
error("row is wrong length");
if (a0i & 1) ^ blackPixels)
++a0i;
if ((codingPos & 1) ^ blackPixels)
++codingPos;
codingLine[a0i] = a1;
} else if (a1 < codingLine[a0i]) {
codingLine[codingPos] = a1;
} else if (a1 < codingLine[codingPos]) {
if (a1 < 0)
error("invalid code");
while (a0i > 0 && a1 < codingLine[a0i - 1])
--a0i;
this.codingLine[a0i] = a1;
while (codingPos > 0 && a1 < codingLine[codingPos - 1])
--codingPos;
this.codingLine[codingPos] = a1;
}
this.a0i = a0i;
this.codingPos = codingPos;
};
constructor.prototype.lookChar() {
constructor.prototype.lookChar = function() {
var refLine = this.refLine;
var codingLine = this.codingLine;
var columns = this.columns;
var outputBits = this.outputBits;
var a0i = this.a0i;
var codingPos = this.codingPos;
var b1i, blackPixels, bits;
var refPos, blackPixels, bits;
if (this.buf != EOF)
return buf;
@ -1403,18 +1411,18 @@ var CCITTFaxStream = (function() { @@ -1403,18 +1411,18 @@ var CCITTFaxStream = (function() {
refLine[i++] = columns;
refLine[i] = columns;
codingLine[0] = 0;
a0i = 0;
bl1 = 0;
codingPos = 0;
refPos = 0;
blackPixels = 0;
while (codingLine[a0i] < columns) {
while (codingLine[codingPos] < columns) {
var code1 = this.getTwoDumCode();
switch (code1) {
case twoDimPass:
this.addPixels(refLine[b1i + 1], blackPixels);
a0i = this.a0i;
if (refLine[bli + 1] < columns)
bli += 2;
this.addPixels(refLine[refPos + 1], blackPixels);
codingPos = this.codingPos;
if (refLine[refPos + 1] < columns)
refPos += 2;
break;
case twoDimHoriz:
var code1 = 0, code2 = 0;
@ -1426,7 +1434,7 @@ var CCITTFaxStream = (function() { @@ -1426,7 +1434,7 @@ var CCITTFaxStream = (function() {
do {
code2 += (code3 = this.getWhiteCode());
} while (code3 >= 64);
else {
} else {
var code3;
do {
code1 += (code3 = this.getWhiteCode());
@ -1435,105 +1443,105 @@ var CCITTFaxStream = (function() { @@ -1435,105 +1443,105 @@ var CCITTFaxStream = (function() {
code2 += (code3 = this.getBlackCode());
} while (code3 >= 64);
}
this.addPixels(codingLine[a0i] + code1, blackPixels);
a0i = this.a0i;
if (codingLine[a0i] < columns) {
this.addPixels(codeLine[a0i] + code2,
this.addPixels(codingLine[codingPos] + code1, blackPixels);
codingPos = this.codingPos;
if (codingLine[codingPos] < columns) {
this.addPixels(codeLine[codingPos] + code2,
blackPixels ^ 1);
a0i = this.a0i;
codingPos = this.codingPos;
}
while (refLine[b1i] <= codingLine[a0i]
&& refLine[bli] < columns) {
bli += 2;
while (refLine[refPos] <= codingLine[codingPos]
&& refLine[refPos] < columns) {
refPos += 2;
}
break;
case twoDimVertR3:
this.addPixels(refLine[b1i] + 3, blackPixels);
a0i = this.a0i;
this.addPixels(refLine[refPos] + 3, blackPixels);
codingPos = this.codingPos;
blackPixels ^= 1;
if (codingLine[a0i] < columns) {
++b1i;
while (refLine[b1i] <= codingLine[a0i] &&
refLine[b1i] < columns)
b1i += 2;
if (codingLine[codingPos] < columns) {
++refPos;
while (refLine[refPos] <= codingLine[codingPos] &&
refLine[refPos] < columns)
refPos += 2;
}
break;
case twoDimVertR2:
this.addPixels(refLine[b1i] + 2, blackPixels);
a0i = this.a0i;
this.addPixels(refLine[refPos] + 2, blackPixels);
codingPos = this.codingPos;
blackPixels ^= 1;
if (codingLine[a01] < columns) {
++bli;
while (refLine[bli] <= codingLine[a0i] &&
refLine[bli] < columns) {
bli += 2;
if (codingLine[codingPos] < columns) {
++refPos;
while (refLine[refPos] <= codingLine[codingPos] &&
refLine[refPos] < columns) {
refPos += 2;
}
}
break;
case twoDimVertR1:
this.addPixels(refLine[bli] + 1, blackPixels);
a0i = this.a0i;
this.addPixels(refLine[refPos] + 1, blackPixels);
codingPos = this.codingPos;
blackPixels ^= 1;
if (codingLine[a01] < columns) {
++bli;
while (refLine[bli] < codingLine[a0i] &&
refLine[bli] < columns)
this.bli += 2;
if (codingLine[codingPos] < columns) {
++refPos;
while (refLine[refPos] < codingLine[codingPos] &&
refLine[refPos] < columns)
refPos += 2;
}
break;
case twoDimVert0:
this.addPixels(refLine[bli], blackPixels);
a0i = this.a0i;
this.addPixels(refLine[refPos], blackPixels);
codingPos = this.codingPos;
blackPixels ^= 1;
if (codingLine[a0i] < columns) {
++bli;
while (refLine[bli] <= codingLine[a0i] &&
refLine[bli] < columns)
bli += 2;
if (codingLine[codingPos] < columns) {
++refPos;
while (refLine[refPos] <= codingLine[codingPos] &&
refLine[refPos] < columns)
refPos += 2;
}
break;
case twoDimVertL3:
this.addPixelsNeg(refLine[bli] - 3, blackPixels);
a0i = this.a0i;
this.addPixelsNeg(refLine[refPos] - 3, blackPixels);
codingPos = this.codingPos;
blackPixels ^= 1;
if (codeLine[a0i] < columns) {
if (bli > 0)
--bli;
if (codeLine[codingPos] < columns) {
if (refPos > 0)
--refPos;
else
++bli;
while (refLine[b1i] <= codingLine[a0i] &&
refLine[b1i] < columns)
bli += 2;
++refPos;
while (refLine[refPos] <= codingLine[codingPos] &&
refLine[refPos] < columns)
refPos += 2;
}
break;
case twoDimVertL2:
this.addPixelsNeg(refLine[b1i] - 2, blackPixels);
a0i = this.a0i;
this.addPixelsNeg(refLine[refPos] - 2, blackPixels);
codingPos = this.codingPos;
blackPixels ^= 1;
if (codingLine[a0i] < columns) {
if (b1i > 0)
--b1i;
if (codingLine[codingPos] < columns) {
if (refPos > 0)
--refPos;
else
++bli;
while (refLine[b1i] <= codingLine[a0i] &&
++refPos;
while (refLine[refPos] <= codingLine[codingPos] &&
refLine[b11] < columns)
b1i += 2;
refPos += 2;
}
break;
///////// STOPPED HERE
case twoDimVertL1:
this.addPixelsNeg(refLine[bli] - 1, blackPixels);
this.addPixelsNeg(refLine[refPos] - 1, blackPixels);
this.blackPixels ^= 1;
if (codingLine[a0i] < columns) {
if (blu > 0)
--bli;
if (codingLine[codingPos] < columns) {
if (refPos > 0)
--refPos;
else
++bli;
++refPos;
while (refLine[bli] <= codeLine[a0i] &&
refLine[bli] < columns)
bli += 2;
while (refLine[refPos] <= codeLine[codingPos] &&
refLine[refPos] < columns)
refPos += 2;
}
break;
case EOF:
@ -1546,9 +1554,9 @@ var CCITTFaxStream = (function() { @@ -1546,9 +1554,9 @@ var CCITTFaxStream = (function() {
}
} else {
codingLine[0] = 0;
a0i = 0;
codingPos = 0;
blackPixels = 0;
while(codeLine[a0i] < columns) {
while(codeLine[codingPos] < columns) {
code1 = 0;
if (blackPixels) {
do {
@ -1559,7 +1567,7 @@ var CCITTFaxStream = (function() { @@ -1559,7 +1567,7 @@ var CCITTFaxStream = (function() {
code1 += (code3 = getWhiteCode());
} while (code3 >= 64);
}
this.addPixels(codingLine[a0i] + code1, blackPixels);
this.addPixels(codingLine[codingPos] + code1, blackPixels);
blackPixels ^= 1;
}
}
@ -1574,7 +1582,7 @@ var CCITTFaxStream = (function() { @@ -1574,7 +1582,7 @@ var CCITTFaxStream = (function() {
code1 = lookBits(12);
while (code1 == 0) {
eatBits(1);
code1 = lookBits(12);
code1 = this.lookBits(12);
}
if (code1 = 1) {
eatBits(12);
@ -1585,27 +1593,27 @@ var CCITTFaxStream = (function() { @@ -1585,27 +1593,27 @@ var CCITTFaxStream = (function() {
}
if (!oef && encoding > 0) {
nextLine2D = !lookBits(1);
nextLine2D = !this.lookBits(1);
eatBits(1);
}
if (eob && gotEol) {
code1 = lookBits(12);
code1 = this.lookBits(12);
if (code1 == 1) {
eatBits(12);
if (encoding > 0) {
lookBits(1);
eatBits(1);
this.lookBits(1);
this.eatBits(1);
}
if (encoding >= 0) {
for (i = 0; i < 4; ++i) {
code1 = lookBits(12);
code1 = this.lookBits(12);
if (code1 != 1)
error("bad rtc code");
eatBits(12);
if (encoding > 0) {
lookBits(1);
eatBits(1);
this.lookBits(1);
this.eatBits(1);
}
}
}
@ -1614,18 +1622,18 @@ var CCITTFaxStream = (function() { @@ -1614,18 +1622,18 @@ var CCITTFaxStream = (function() {
}
if (codingLine[0] > 0)
outputBits = codingLine[a0i = 0];
outputBits = codingLine[codingPos = 0];
else
outputBits = codingLine[a0i = 1];
outputBits = codingLine[codingPos = 1];
++row;
}
if (outputBits >= 8) {
buf = (a0i & 1) ? 0 : 0xFF;
buf = (codingPos & 1) ? 0 : 0xFF;
outputBits -= 8;
if (outputBits == 0&& codingLine[a0i] < columns) {
++a0i;
outputBits = codingLine[a0i] - codingLine[a0i - 1];
if (outputBits == 0&& codingLine[codingPos] < columns) {
++codingPos;
outputBits = codingLine[codingPos] - codingLine[codingPos - 1];
}
} else {
bits = 8;
@ -1633,21 +1641,21 @@ var CCITTFaxStream = (function() { @@ -1633,21 +1641,21 @@ var CCITTFaxStream = (function() {
do {
if (outputBits > bits) {
buf << bits;
if (!(a0i & 1)) {
if (!(codingPos & 1)) {
buf |= 0xFF >> (8 - bits);
}
outputBits -= bits;
bits = 0;
} else {
buf <<= outputBits;
if (!(a0i & 1)) {
if (!(codingPos & 1)) {
buf |= 0xFF >> (8 - outputBits);
}
bits -= outputBits;
outputBits = 0;
if (codingLine[a0i] < columns) {
++a0i;
outputBits = codingLine[a0i] - codingLine[a0i - 1];
if (codingLine[codingPos] < columns) {
++codingPos;
outputBits = codingLine[codingPos] - codingLine[codingPos - 1];
} else if (bits > 0) {
buf <<= bits;
bits = 0;
@ -1659,8 +1667,8 @@ var CCITTFaxStream = (function() { @@ -1659,8 +1667,8 @@ var CCITTFaxStream = (function() {
buf ^= 0xFF;
}
return buf;
}
constructor.prototype.getTwoDimCode() {
};
constructor.prototype.getTwoDimCode = function() {
var code = 0;
var p;
if (this.eoblock) {
@ -1686,7 +1694,7 @@ var CCITTFaxStream = (function() { @@ -1686,7 +1694,7 @@ var CCITTFaxStream = (function() {
error("Bad two dim code");
};
constructor.prototype.getWhiteCode() {
constructor.prototype.getWhiteCode = function() {
var code = 0;
var p;
var n;
@ -1726,14 +1734,14 @@ var CCITTFaxStream = (function() { @@ -1726,14 +1734,14 @@ var CCITTFaxStream = (function() {
code <<= 12 - n;
p = whiteTable1[code];
if (p[0] == n) {
eatBits(n);
this.eatBits(n);
return p[1];
}
}
}
error("bad white code");
};
constructor.prototype.getBlackCode() {
constructor.prototype.getBlackCode = function() {
var code, p, n;
if (this.eoblock) {
code = this.lookBits(13);
@ -1793,7 +1801,7 @@ var CCITTFaxStream = (function() { @@ -1793,7 +1801,7 @@ var CCITTFaxStream = (function() {
}
error("bad black code");
};
constructor.prototype.lookBits(n) {
constructor.prototype.lookBits = function(n) {
var c;
while (inputBits < n) {
if (typeof (c = str.getByte()) == "undefined") {
@ -1806,7 +1814,7 @@ var CCITTFaxStream = (function() { @@ -1806,7 +1814,7 @@ var CCITTFaxStream = (function() {
}
return (inputBuf >> (inputBits - n)) & (0xFFFF >> (16 - n));
};
constructor.prototype.eatBits(n) {
constructor.prototype.eatBits = function(n) {
if ((inputBits -= n) < 0)
inputBits = 0;
}

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