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| define(["require", "exports", "./byte-array", "./../../primitives/pdf-stream", "./../../input-output/pdf-dictionary-properties", "./../../primitives/pdf-name", "./../../primitives/pdf-number", "./../../primitives/pdf-boolean", "./../../primitives/pdf-dictionary"], function (require, exports, byte_array_1, pdf_stream_1, pdf_dictionary_properties_1, pdf_name_1, pdf_number_1, pdf_boolean_1, pdf_dictionary_1) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var ImageFormat;
(function (ImageFormat) {
ImageFormat[ImageFormat["Unknown"] = 0] = "Unknown";
ImageFormat[ImageFormat["Bmp"] = 1] = "Bmp";
ImageFormat[ImageFormat["Emf"] = 2] = "Emf";
ImageFormat[ImageFormat["Gif"] = 3] = "Gif";
ImageFormat[ImageFormat["Jpeg"] = 4] = "Jpeg";
ImageFormat[ImageFormat["Png"] = 5] = "Png";
ImageFormat[ImageFormat["Wmf"] = 6] = "Wmf";
ImageFormat[ImageFormat["Icon"] = 7] = "Icon";
})(ImageFormat = exports.ImageFormat || (exports.ImageFormat = {}));
var ImageDecoder = (function () {
function ImageDecoder(stream) {
this.sof1Marker = 0x00C1;
this.sof2Marker = 0x00C2;
this.sof3Marker = 0x00C3;
this.sof5Marker = 0x00C5;
this.sof6Marker = 0x00C6;
this.sof7Marker = 0x00C7;
this.sof9Marker = 0x00C9;
this.sof10Marker = 0x00CA;
this.sof11Marker = 0x00CB;
this.sof13Marker = 0x00CD;
this.sof14Marker = 0x00CE;
this.sof15Marker = 0x00CF;
this.mFormat = ImageFormat.Unknown;
this.mbitsPerComponent = 8;
this.dictionaryProperties = new pdf_dictionary_properties_1.DictionaryProperties();
this.mStream = stream;
this.initialize();
}
Object.defineProperty(ImageDecoder.prototype, "height", {
get: function () {
return this.mHeight;
},
enumerable: true,
configurable: true
});
Object.defineProperty(ImageDecoder.prototype, "width", {
get: function () {
return this.mWidth;
},
enumerable: true,
configurable: true
});
Object.defineProperty(ImageDecoder.prototype, "bitsPerComponent", {
get: function () {
return this.mbitsPerComponent;
},
enumerable: true,
configurable: true
});
Object.defineProperty(ImageDecoder.prototype, "size", {
get: function () {
return this.mImageData.count;
},
enumerable: true,
configurable: true
});
Object.defineProperty(ImageDecoder.prototype, "imageData", {
get: function () {
return this.mImageData;
},
enumerable: true,
configurable: true
});
Object.defineProperty(ImageDecoder.prototype, "imageDataAsNumberArray", {
get: function () {
return this.mImageData.internalBuffer.buffer;
},
enumerable: true,
configurable: true
});
ImageDecoder.prototype.initialize = function () {
if (this.mFormat === ImageFormat.Unknown && this.checkIfJpeg()) {
this.mFormat = ImageFormat.Jpeg;
this.parseJpegImage();
}
else {
throw new TypeError('Only the JPEG format is supported');
}
this.reset();
this.mImageData = new byte_array_1.ByteArray(this.mStream.count);
this.mStream.read(this.mImageData, 0, this.mImageData.count);
};
ImageDecoder.prototype.reset = function () {
this.mStream.position = 0;
};
ImageDecoder.prototype.parseJpegImage = function () {
this.reset();
var imgData = new byte_array_1.ByteArray(this.mStream.count);
this.mStream.read(imgData, 0, imgData.count);
var i = 4;
var isLengthExceed = false;
var length = imgData.getBuffer(i) * 256 + imgData.getBuffer(i + 1);
while (i < imgData.count) {
i += length;
if (i < imgData.count) {
if (imgData.getBuffer(i + 1) === 192) {
this.mHeight = imgData.getBuffer(i + 5) * 256 + imgData.getBuffer(i + 6);
this.mWidth = imgData.getBuffer(i + 7) * 256 + imgData.getBuffer(i + 8);
return;
}
else {
i += 2;
length = imgData.getBuffer(i) * 256 + imgData.getBuffer(i + 1);
}
}
else {
isLengthExceed = true;
break;
}
}
if (isLengthExceed) {
this.mStream.position = 0;
this.skip(this.mStream, 2);
this.readExceededJPGImage(this.mStream);
}
};
Object.defineProperty(ImageDecoder.prototype, "format", {
get: function () {
return this.mFormat;
},
enumerable: true,
configurable: true
});
ImageDecoder.prototype.checkIfJpeg = function () {
this.reset();
for (var i = 0; i < ImageDecoder.mJpegHeader.length; i++) {
if (ImageDecoder.mJpegHeader[i] !== this.mStream.readByte(i)) {
return false;
}
this.mStream.position++;
}
return true;
};
ImageDecoder.prototype.getImageDictionary = function () {
if (this.mFormat === ImageFormat.Jpeg) {
var tempArrayBuffer = this.imageData.internalBuffer.length;
this.imageStream = new pdf_stream_1.PdfStream();
this.imageStream.isResource = true;
var tempString = '';
var decodedString = '';
for (var i = 0; i < this.imageDataAsNumberArray.byteLength; i++) {
tempString += String.fromCharCode(null, this.mStream.readByte(i));
}
for (var i = 0; i < tempString.length; i++) {
if (i % 2 !== 0) {
decodedString += tempString[i];
}
}
this.imageStream.data = [decodedString];
this.imageStream.compress = false;
this.imageStream.items.setValue(this.dictionaryProperties.type, new pdf_name_1.PdfName(this.dictionaryProperties.xObject));
this.imageStream.items.setValue(this.dictionaryProperties.subtype, new pdf_name_1.PdfName(this.dictionaryProperties.image));
this.imageStream.items.setValue(this.dictionaryProperties.width, new pdf_number_1.PdfNumber(this.width));
this.imageStream.items.setValue(this.dictionaryProperties.height, new pdf_number_1.PdfNumber(this.height));
this.imageStream.items.setValue(this.dictionaryProperties.bitsPerComponent, new pdf_number_1.PdfNumber(this.bitsPerComponent));
this.imageStream.items.setValue(this.dictionaryProperties.filter, new pdf_name_1.PdfName(this.dictionaryProperties.dctdecode));
this.imageStream.items.setValue(this.dictionaryProperties.colorSpace, new pdf_name_1.PdfName(this.getColorSpace()));
this.imageStream.items.setValue(this.dictionaryProperties.decodeParms, this.getDecodeParams());
return this.imageStream;
}
else {
return this.imageStream;
}
};
ImageDecoder.prototype.getColorSpace = function () {
return this.dictionaryProperties.deviceRgb;
};
ImageDecoder.prototype.getDecodeParams = function () {
var decodeParams = new pdf_dictionary_1.PdfDictionary();
decodeParams.items.setValue(this.dictionaryProperties.columns, new pdf_number_1.PdfNumber(this.width));
decodeParams.items.setValue(this.dictionaryProperties.blackIs1, new pdf_boolean_1.PdfBoolean(true));
decodeParams.items.setValue(this.dictionaryProperties.k, new pdf_number_1.PdfNumber(-1));
decodeParams.items.setValue(this.dictionaryProperties.predictor, new pdf_number_1.PdfNumber(15));
decodeParams.items.setValue(this.dictionaryProperties.bitsPerComponent, new pdf_number_1.PdfNumber(this.bitsPerComponent));
return decodeParams;
};
ImageDecoder.prototype.readExceededJPGImage = function (stream) {
this.mStream = stream;
var isContinueReading = true;
while (isContinueReading) {
var marker = this.getMarker(stream);
switch (marker) {
case this.sof1Marker:
case this.sof2Marker:
case this.sof3Marker:
case this.sof5Marker:
case this.sof6Marker:
case this.sof7Marker:
case this.sof9Marker:
case this.sof10Marker:
case this.sof11Marker:
case this.sof13Marker:
case this.sof14Marker:
case this.sof15Marker:
stream.position += 3;
this.mHeight = this.mStream.readNextTwoBytes(stream);
this.mWidth = this.mStream.readNextTwoBytes(stream);
isContinueReading = false;
break;
default:
this.skipStream(stream);
break;
}
}
};
ImageDecoder.prototype.skip = function (stream, noOfBytes) {
this.mStream = stream;
var temp = new byte_array_1.ByteArray(noOfBytes);
this.mStream.read(temp, 0, temp.count);
};
ImageDecoder.prototype.getMarker = function (stream) {
var skippedByte = 0;
var marker = 32;
marker = stream.readByte(this.mStream.position);
stream.position++;
while (marker !== 255) {
skippedByte++;
marker = stream.readByte(this.mStream.position);
stream.position++;
}
do {
marker = stream.readByte(this.mStream.position);
stream.position++;
} while (marker === 255);
return marker;
};
ImageDecoder.prototype.skipStream = function (stream) {
var markerLength = this.mStream.readNextTwoBytes(stream) - 2;
if (markerLength > 0) {
stream.position += markerLength;
}
};
ImageDecoder.mPngHeader = [137, 80, 78, 71, 13, 10, 26, 10];
ImageDecoder.mJpegHeader = [255, 216];
ImageDecoder.GIF_HEADER = 'G,I,F,8';
ImageDecoder.BMP_HEADER = 'B,M';
return ImageDecoder;
}());
exports.ImageDecoder = ImageDecoder;
});
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