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working version of faxstream

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sbarman 2011-06-24 13:59:37 -07:00
parent 2d4c2c0ff3
commit b7f24d2719
1 changed files with 43 additions and 34 deletions
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pdf.js
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@ -1322,10 +1322,11 @@ var CCITTFaxStream = (function() {
this.black = params.get("BlackIs1") || false; this.black = params.get("BlackIs1") || false;
this.codingLine = new Uint32Array(this.columns + 1); this.codingLine = new Uint32Array(this.columns + 1);
this.refLine = new Uint32Array(this.columns + 2);
this.codingLine[0] = this.columns; this.codingLine[0] = this.columns;
this.codingPos = 0; this.codingPos = 0;
this.refLine = new Uint32Array(this.columns + 2);
this.row = 0; this.row = 0;
this.nextLine2D = this.encoding < 0; this.nextLine2D = this.encoding < 0;
this.inputBits = 0; this.inputBits = 0;
@ -1350,12 +1351,20 @@ var CCITTFaxStream = (function() {
constructor.prototype = Object.create(DecodeStream.prototype); constructor.prototype = Object.create(DecodeStream.prototype);
constructor.prototype.readBlock = function() { constructor.prototype.readBlock = function() {
var vals = [];
while (!this.eof) { while (!this.eof) {
var c = this.lookChar(); var c = this.lookChar();
vals.push(c);
this.buf = EOF; this.buf = EOF;
this.ensureBuffer(this.bufferLength + 1); this.ensureBuffer(this.bufferLength + 1);
this.buffer[this.bufferLength++] = c; this.buffer[this.bufferLength++] = c;
} }
var all = "";
for (var i = 0; i < vals.length; ++i)
all += vals[i] + " \n";
var text = document.getElementById("text");
text.value = all;
}; };
constructor.prototype.addPixels = function(a1, blackPixels) { constructor.prototype.addPixels = function(a1, blackPixels) {
var codingLine = this.codingLine; var codingLine = this.codingLine;
@ -1412,8 +1421,6 @@ var CCITTFaxStream = (function() {
if (this.buf != EOF) if (this.buf != EOF)
return buf; return buf;
this.err = false;
if (this.outputBits == 0) { if (this.outputBits == 0) {
if (this.eof) if (this.eof)
return; return;
@ -1494,7 +1501,7 @@ var CCITTFaxStream = (function() {
blackPixels ^= 1; blackPixels ^= 1;
if (codingLine[this.codingPos] < columns) { if (codingLine[this.codingPos] < columns) {
++refPos; ++refPos;
while (refLine[refPos] < codingLine[this.codingPos] && while (refLine[refPos] <= codingLine[this.codingPos] &&
refLine[refPos] < columns) refLine[refPos] < columns)
refPos += 2; refPos += 2;
} }
@ -1535,7 +1542,6 @@ var CCITTFaxStream = (function() {
refPos += 2; refPos += 2;
} }
break; break;
case twoDimVertL1: case twoDimVertL1:
this.addPixelsNeg(refLine[refPos] - 1, blackPixels); this.addPixelsNeg(refLine[refPos] - 1, blackPixels);
blackPixels ^= 1; blackPixels ^= 1;
@ -1556,7 +1562,7 @@ var CCITTFaxStream = (function() {
break; break;
default: default:
warn("bad 2d code"); warn("bad 2d code");
addPixels(columns, 0); this.addPixels(columns, 0);
this.err = true; this.err = true;
break; break;
} }
@ -1586,7 +1592,7 @@ var CCITTFaxStream = (function() {
var gotEOL = false; var gotEOL = false;
if (this.eoblock && this.row == this.rows - 1) { if (!this.eoblock && this.row == this.rows - 1) {
this.eof = true; this.eof = true;
} else { } else {
code1 = this.lookBits(12); code1 = this.lookBits(12);
@ -1610,7 +1616,7 @@ var CCITTFaxStream = (function() {
if (this.eoblock && gotEOL) { if (this.eoblock && gotEOL) {
code1 = this.lookBits(12); code1 = this.lookBits(12);
if (code1 == 1) { if (code1 == 1) {
eatBits(12); this.eatBits(12);
if (this.encoding > 0) { if (this.encoding > 0) {
this.lookBits(1); this.lookBits(1);
this.eatBits(1); this.eatBits(1);
@ -1619,7 +1625,7 @@ var CCITTFaxStream = (function() {
for (var i = 0; i < 4; ++i) { for (var i = 0; i < 4; ++i) {
code1 = this.lookBits(12); code1 = this.lookBits(12);
if (code1 != 1) if (code1 != 1)
error("bad rtc code"); warning("bad rtc code");
this.eatBits(12); this.eatBits(12);
if (this.encoding > 0) { if (this.encoding > 0) {
this.lookBits(1); this.lookBits(1);
@ -1629,7 +1635,7 @@ var CCITTFaxStream = (function() {
} }
this.eof = true; this.eof = true;
} }
} else if (this.err && this.eolin) { } else if (this.err && this.eoline) {
var code1; var code1;
while (true) { while (true) {
code1 = this.lookBits(13); code1 = this.lookBits(13);
@ -1645,7 +1651,7 @@ var CCITTFaxStream = (function() {
this.eatBits(12); this.eatBits(12);
if (this.encoding > 0) { if (this.encoding > 0) {
this.eatBits(1); this.eatBits(1);
this.nextLine2 = !(code1 & 1); this.nextLine2D = !(code1 & 1);
} }
} }
@ -1664,32 +1670,32 @@ var CCITTFaxStream = (function() {
this.outputBits = codingLine[this.codingPos] - codingLine[this.codingPos - 1]; this.outputBits = codingLine[this.codingPos] - codingLine[this.codingPos - 1];
} }
} else { } else {
this.bits = 8; var bits = 8;
this.buf = 0; this.buf = 0;
do { do {
if (this.outputBits > this.bits) { if (this.outputBits > bits) {
this.buf << this.bits; this.buf <<= bits;
if (!(this.codingPos & 1)) { if (!(this.codingPos & 1)) {
this.buf |= 0xFF >> (8 - this.bits); this.buf |= 0xFF >> (8 - bits);
} }
this.outputBits -= this.bits; this.outputBits -= bits;
this.bits = 0; bits = 0;
} else { } else {
this.buf <<= this.outputBits; this.buf <<= this.outputBits;
if (!(this.codingPos & 1)) { if (!(this.codingPos & 1)) {
this.buf |= 0xFF >> (8 - this.outputBits); this.buf |= 0xFF >> (8 - this.outputBits);
} }
this.bits -= this.outputBits; bits -= this.outputBits;
this.outputBits = 0; this.outputBits = 0;
if (codingLine[this.codingPos] < columns) { if (codingLine[this.codingPos] < columns) {
this.codingPos++; this.codingPos++;
this.outputBits = codingLine[this.codingPos] - codingLine[this.codingPos - 1]; this.outputBits = codingLine[this.codingPos] - codingLine[this.codingPos - 1];
} else if (this.bits > 0) { } else if (bits > 0) {
this.buf <<= this.bits; this.buf <<= bits;
this.bits = 0; bits = 0;
} }
} }
} while (this.bits); } while (bits);
} }
if (this.black) { if (this.black) {
this.buf ^= 0xFF; this.buf ^= 0xFF;
@ -1729,7 +1735,7 @@ var CCITTFaxStream = (function() {
var n; var n;
if (this.eoblock) { if (this.eoblock) {
code = this.lookBits(12); code = this.lookBits(12);
if (typeof code == "undefined") if (code == EOF)
return 1; return 1;
if ((code >> 5) == 0) if ((code >> 5) == 0)
@ -1744,7 +1750,7 @@ var CCITTFaxStream = (function() {
} else { } else {
for (var n = 1; n <= 9; ++n) { for (var n = 1; n <= 9; ++n) {
code = this.lookBits(n); code = this.lookBits(n);
if (typeof code == "undefined") if (code == EOF)
return 1; return 1;
if (n < 9) if (n < 9)
@ -1757,7 +1763,7 @@ var CCITTFaxStream = (function() {
} }
for (var n = 11; n <= 12; ++n) { for (var n = 11; n <= 12; ++n) {
code == this.lookBits(n); code == this.lookBits(n);
if (typeof code == "undefined") if (code == EOF)
return 1; return 1;
if (n < 12) if (n < 12)
code <<= 12 - n; code <<= 12 - n;
@ -1776,7 +1782,7 @@ var CCITTFaxStream = (function() {
var code, p, n; var code, p, n;
if (this.eoblock) { if (this.eoblock) {
code = this.lookBits(13); code = this.lookBits(13);
if (typeof code == "undefined") if (code == EOF)
return 1; return 1;
if ((code >> 7) == 0) if ((code >> 7) == 0)
p = blackTable1[code]; p = blackTable1[code];
@ -1792,7 +1798,7 @@ var CCITTFaxStream = (function() {
} else { } else {
for (var n = 2; n <= 6; ++n) { for (var n = 2; n <= 6; ++n) {
code = this.lookBits(n); code = this.lookBits(n);
if (typeof code == "undefined") if (code == EOF)
return 1; return 1;
if (n < 6) if (n < 6)
code <<= 6 - n; code <<= 6 - n;
@ -1805,7 +1811,7 @@ var CCITTFaxStream = (function() {
} }
for (var n = 7; n <= 12; ++n) { for (var n = 7; n <= 12; ++n) {
code = this.lookBits(n); code = this.lookBits(n);
if (typeof code == "undefined") if (code == EOF)
return 1; return 1;
if (n < 12) if (n < 12)
code <<= 12 - n; code <<= 12 - n;
@ -4266,6 +4272,9 @@ var CanvasGraphics = (function() {
if (numComps != 1) if (numComps != 1)
error("worng numComps"); error("worng numComps");
ctx.strokeStyle = "#090";
ctx.strokeRect(0 + 1, -h + 1, w / 2, h -2 );
var imgArray = image.getBytes((numComps * w * h) >> 3); var imgArray = image.getBytes((numComps * w * h) >> 3);
var imgIdx = 0; var imgIdx = 0;
@ -4278,13 +4287,13 @@ var CanvasGraphics = (function() {
var imgData = tmpCtx.getImageData(0, 0, w, h); var imgData = tmpCtx.getImageData(0, 0, w, h);
var pixels = imgData.data; var pixels = imgData.data;
var mask = 128; var mask = 1;
var b = 0; var b = 0;
for (var i = 0, length = imgArray.length*8*4; i < length; i += 4) { for (var i = 0, length = 4 * w * h; i < length; i += 4) {
mask <<= 1; mask >>= 1;
if (mask >= 256) { if (mask <= 0) {
b = imgArray[imgIdx++]; b = imgArray[imgIdx++];
mask = 1; mask = 128;
} }
var p = b & mask; var p = b & mask;