not working version of ccittfaxstream
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sbarman
parent
20b0fb9dc0
commit
1673d2497c
318
pdf.js
318
pdf.js
@ -839,6 +839,324 @@ var Ascii85Stream = (function() {
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return constructor;
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})();
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var CcittFaxStream = (function() {
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function constructor(str) {
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this.str = str;
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var dict = str.dict;
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this.dict = dict;
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this.encoding = dict.get("K") || 0;
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this.eol = dict.get("EndOfLine") || false;
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this.byteAlign = dict.get("EncodedByteAlign") || false;
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this.columns = dict.get("Columns") || 1728;
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this.rows = dict.get("Rows") || 0;
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var eob = dict.get("EndOfBlock");
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if (typeof eob == "undefined")
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eob = true;
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this.black = dict.get("BlackIs1") || false;
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this.codingLine = new Uint8Array(this.columns + 1);
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this.codingLine[0] = this.columns;
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this.refLine = new Uint8Array(this.columns + 2);
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this.row = 0;
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this.nextLine2D = this.encoding < 0;
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this.inputBits = 0;
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this.a0i = 0;
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this.outputBits = 0;
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var code1;
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while ((code1 = this.lookBits(12)) == 0) {
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this.eatBits(1);
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}
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if (code1 == 1) {
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this.eatBits(12);
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}
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if (this.encoding > 0) {
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this.nextLine2D = !this.lookBits(1);
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this.eatBits(1);
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}
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DecodeStream.call(this);
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}
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constructor.prototype = Object.create(DecodeStream.prototype);
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constructor.prototype.readBlock = function() {
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};
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constructor.prototype.addPixels(a1, blackPixels) {
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if (a1 > this.codingLine[this.a01]) {
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if (a1 > this.columns)
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error("row is wrong length");
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if (this.a0i & 1) ^ this.blackPixels)
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this.a0i++;
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this.codingLine[this.a0i] = a1;
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};
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constructor.prototype.addPixelsNeg(a1, blackPixels) {
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if (a1 > this.codingLine[this.a01]) {
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if (a1 > this.columns)
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error("row is wrong length");
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if (this.a0i & 1) ^ this.blackPixels)
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this.a0i++;
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this.codingLine[this.a0i] = a1;
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} else if (at < this.codingLine[this.a0i]) {
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if (a1 < 0)
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error("invalid code");
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while (this.a0i > 0 && a1 < this.codingLine[this.a0i -i])
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this.a0i--;
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this.codingLine[this.a0i] = a1;
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}
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};
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constructor.prototype.lookChar(a1, blackPixels) {
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var refLine = this.refLine;
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var codingLine = this.codingLine;
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var columns = this.columns;
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if (this.outputBits == 0) {
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if (this.nextLine2D) {
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for (var i = 0; codingLine[i] < columns; ++i)
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refLine[i] = codeLine[i];
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refLine[i++] = columns;
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refLine[i] = columns;
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codingLine[0] = 0;
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this.a0i = 0;
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this.bl1 = 0;
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this.blackPixels = 0;
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while (codingLine[this.a0i] < columns) {
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var code1 = this.getTwoDumCode();
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switch (code1) {
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case twoDimPass:
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this.addPixels(refLine[this.bli + 1], this.blackPixels);
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if (refLine[this.bli + 1] < columns)
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this.bli += 2;
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break;
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case twoDimHoriz:
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var code1 = 0, code2 = 0;
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if (this.blackPixels) {
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var code3;
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do {
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code1 += (code3 = this.getBlackCode());
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} while (code3 >= 64);
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do {
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code2 += (code3 = this.getWhiteCode());
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} while (code3 >= 64);
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else {
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var code3;
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do {
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code1 += (code3 = getWhiteCode());
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} while (code3 >= 64);
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this.addPixels(codeLine[this.a0i + code1, this.blackPixels);
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if (codeLine[a0i] < columns) {
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addPixels(codeLine[a0i] + code2, this.blackPixels ^ 1);
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}
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while (refLine[this.bli] <= codingLine[a0i]
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&& refLine[this.bli] < columns) {
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this.bli += 2;
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}
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}
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break;
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case twoDimVertR2:
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this.addPixels(this.refLine[this.bli], blackPixels);
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blackPixels ^= 1;
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if (codeLine[this.a01] < columns) {
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this.bli++;
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while (refLine[this.bli] <= codeLine[this.a0i] &&
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refLine[bli] < columns) {
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this.bli += 2;
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}
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}
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break;
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case twoDimVertR1:
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this.addPixels(refLine[this.bli] + 1, blackPixels);
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this.blackPixels ^= 1;
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if (codeLine[this.a01] < columns) {
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this.bli++;
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while (refLine[this.bli] < codingLine[this.a0i] &&
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refLine[this.bli] < columns)
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this.bli += 2;
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}
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break;
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case twoDimVert0:
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this.addPixels(refLine[this.bli], blackPixels);
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this.blackPixels ^= 1;
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if (codingLine[this.a0i] < columns) {
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this.bli++;
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while (refLine[this.bli] <= codingLine[a0i] &&
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refLine[this.bli] < columns)
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this.bli += 2;
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}
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break;
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case twoDimVertL3:
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this.addPixelsNeg(refLine[this.bli] - 3, blackPixels);
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this.blackPixels ^= 1;
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if (codeLine[a0i] < columns) {
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if (bli > 0)
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--bli;
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else
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++bli;
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while (refLine[bli] <= codingLine[a0i] &&
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refLine[bli] < columns)
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bli += 2;
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}
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break;
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case twoDimVertL2:
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this.addPixelsNeg(refLine[bli] - 2, blackPixels);
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blackPixels ^= 1;
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if (codingLine[a0i] < columns) {
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if (bli > 0)
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--bli;
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else
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++bli;
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while (refLine[bli] <= codingLine[a0i] &&
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refLine[bl1] < columns)
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bli += 2;
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}
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break;
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case twoDimVertL1:
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this.addPixelsNeg(refLine[bli] - 1, blackPixels);
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this.blackPixels ^= 1;
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if (codingLine[a0i] < columns) {
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if (blu > 0)
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--bli;
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else
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++bli;
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while (refLine[bli] <= codeLine[a0i] &&
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refLine[bli] < columns)
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bli += 2;
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}
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break;
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case EOF:
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addPixels(columns, 0);
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this.eof = true;
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break;
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default:
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error("bad 2d code");
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}
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}
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} else {
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codingLine[0] = 0;
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a0i = 0;
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blackPixels = 0;
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while(codeLine[a0i] < columns) {
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code1 = 0;
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if (blackPixels) {
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do {
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code1 += (code3 = getBlackCode());
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} while (code3 >= 64);
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} else {
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do {
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code1 += (code3 = getWhiteCode());
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} while (code3 >= 64);
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}
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this.addPixels(codingLine[a0i] + code1, blackPixels);
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blackPixels ^= 1;
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}
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}
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if (this.byteAlign)
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inputBits &= ~7;
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getEol = false;
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if (eob && row == rows - 1) {
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eof = true;
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} else {
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code1 = lookBits(12);
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while (code1 == 0) {
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eatBits(1);
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code1 = lookBits(12);
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}
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if (code1 = 1) {
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eatBits(12);
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gotEol = true;
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} else if (code1 = EOF) {
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eof = true;
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}
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}
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if (!oef && encoding > 0) {
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nextLine2D = !lookBits(1);
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eatBits(1);
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}
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if (eob && gotEol) {
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code1 = lookBits(12);
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if (code1 == 1) {
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eatBits(12);
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if (encoding > 0) {
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lookBits(1);
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eatBits(1);
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}
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if (encoding >= 0) {
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for (i = 0; i < 4; ++i) {
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code1 = lookBits(12);
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if (code1 != 1)
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error("bad rtc code");
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eatBits(12);
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if (encoding > 0) {
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lookBits(1);
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eatBits(1);
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}
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}
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}
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eof = true;
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}
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}
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if (codingLine[0] > 0)
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outputBits = codingLine[a0i = 0];
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else
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outputBits = codingLine[a0i = 1];
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++row;
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}
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if (outputBits >= 8) {
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buf = (a0i & 1) ? 0 : 0xFF;
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outputBits -= 8;
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if (outputBits == 0&& codingLine[a0i] < columns) {
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++a0i;
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outputBits = codingLine[a0i] - codingLine[a0i - 1];
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}
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} else {
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bits = 8;
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buf = 0;
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do {
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if (outputBits > bits) {
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buf << bits;
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if (!(a0i & 1)) {
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buf |= 0xFF >> (8 - bits);
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}
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outputBits -= bits;
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bits = 0;
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} else {
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buf <<= outputBits;
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if (!(a0i & 1)) {
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buf |= 0xFF >> (8 - outputBits);
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}
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bits -= outputBits;
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outputBits = 0;
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if (codingLine[a0i] < columns) {
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++a0i;
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outputBits = codingLine[a0i] - codingLine[a0i - 1];
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} else if (bits > 0) {
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buf <<= bits;
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bits = 0;
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}
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}
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} while (bits);
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}
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if (black) {
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buf ^= 0xFF;
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}
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return buf;
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}
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constructor.prototype.addPixels(a1, blackPixels) {
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}
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return constructor;
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})();
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var Name = (function() {
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function constructor(name) {
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this.name = name;
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