/var/www/greso.tech/server/nsm/node_modules/pdf-lib/cjs/core/streams
Edit: /var/www/greso.tech/server/nsm/node_modules/pdf-lib/cjs/core/streams/decode.js (2818B)
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.decodePDFRawStream = void 0;
var tslib_1 = require("tslib");
var errors_1 = require("../errors");
var PDFArray_1 = tslib_1.__importDefault(require("../objects/PDFArray"));
var PDFDict_1 = tslib_1.__importDefault(require("../objects/PDFDict"));
var PDFName_1 = tslib_1.__importDefault(require("../objects/PDFName"));
var PDFNumber_1 = tslib_1.__importDefault(require("../objects/PDFNumber"));
var Ascii85Stream_1 = tslib_1.__importDefault(require("./Ascii85Stream"));
var AsciiHexStream_1 = tslib_1.__importDefault(require("./AsciiHexStream"));
var FlateStream_1 = tslib_1.__importDefault(require("./FlateStream"));
var LZWStream_1 = tslib_1.__importDefault(require("./LZWStream"));
var RunLengthStream_1 = tslib_1.__importDefault(require("./RunLengthStream"));
var Stream_1 = tslib_1.__importDefault(require("./Stream"));
var decodeStream = function (stream, encoding, params) {
if (encoding === PDFName_1.default.of('FlateDecode')) {
return new FlateStream_1.default(stream);
}
if (encoding === PDFName_1.default.of('LZWDecode')) {
var earlyChange = 1;
if (params instanceof PDFDict_1.default) {
var EarlyChange = params.lookup(PDFName_1.default.of('EarlyChange'));
if (EarlyChange instanceof PDFNumber_1.default) {
earlyChange = EarlyChange.asNumber();
}
}
return new LZWStream_1.default(stream, undefined, earlyChange);
}
if (encoding === PDFName_1.default.of('ASCII85Decode')) {
return new Ascii85Stream_1.default(stream);
}
if (encoding === PDFName_1.default.of('ASCIIHexDecode')) {
return new AsciiHexStream_1.default(stream);
}
if (encoding === PDFName_1.default.of('RunLengthDecode')) {
return new RunLengthStream_1.default(stream);
}
throw new errors_1.UnsupportedEncodingError(encoding.asString());
};
exports.decodePDFRawStream = function (_a) {
var dict = _a.dict, contents = _a.contents;
var stream = new Stream_1.default(contents);
var Filter = dict.lookup(PDFName_1.default.of('Filter'));
var DecodeParms = dict.lookup(PDFName_1.default.of('DecodeParms'));
if (Filter instanceof PDFName_1.default) {
stream = decodeStream(stream, Filter, DecodeParms);
}
else if (Filter instanceof PDFArray_1.default) {
for (var idx = 0, len = Filter.size(); idx < len; idx++) {
stream = decodeStream(stream, Filter.lookup(idx, PDFName_1.default), DecodeParms && DecodeParms.lookupMaybe(idx, PDFDict_1.default));
}
}
else if (!!Filter) {
throw new errors_1.UnexpectedObjectTypeError([PDFName_1.default, PDFArray_1.default], Filter);
}
return stream;
};
//# sourceMappingURL=decode.js.map