tests_dicom_filePixGenerator.js
// namespace
// eslint-disable-next-line no-var
var test = test || {};
/**
* FilePixGenerator
* Generates pixel data from file(s).
*
* @param {object} options The generator options.
* @class
*/
const FilePixGenerator = function (options) {
const numberOfColumns = options.numberOfColumns;
const numberOfRows = options.numberOfRows;
const isRGB = options.photometricInterpretation === 'RGB';
this.setImages = function (imgs) {
// check sizes
let img;
for (let i = 0; i < imgs.length; ++i) {
img = imgs[i];
if (img.width !== numberOfColumns) {
throw new Error('Image width mismatch: ' +
img.width + '!=' + numberOfColumns);
}
if (img.height !== numberOfRows) {
throw new Error('Image height mismatch: ' +
img.height + '!=' + numberOfRows);
}
}
// store
this.images = imgs;
};
this.generate = function (pixelBuffer, sliceNumber) {
let image = null;
if (sliceNumber < this.images.length) {
image = this.images[sliceNumber];
} else {
image = this.images[0];
}
// get the image data
const imageData = test.getImageDataData(image);
// extract fist component for the pixelBuffer
const dataLen = imageData.length;
let j = 0;
for (let i = 0; i < dataLen; i += 4) {
pixelBuffer[j] = imageData[i];
j += 1;
if (isRGB) {
pixelBuffer[j + 1] = imageData[i + 1];
pixelBuffer[j + 2] = imageData[i + 2];
j += 2;
}
}
};
};
/**
* Check tags are coherent with image size.
*
* @param {object} tags The tags to check.
* @param {object} image The associated image.
* @returns {boolean} True if the tags are ok.
*/
function fileCheckTags(tags, image) {
/**
* @param {number} value The value to check.
* @returns {number} The expected value.
*/
function getExpectedSize(value) {
return value;
}
let needUpdate = false;
if (tags.Columns !== getExpectedSize(image.width)) {
tags.Columns = getExpectedSize(image.width);
needUpdate = true;
}
if (tags.Rows !== getExpectedSize(image.height)) {
tags.Rows = getExpectedSize(image.height);
needUpdate = true;
}
return needUpdate;
}
test.pixelGenerators = test.pixelGenerators || {};
test.pixelGenerators.file = {
generator: FilePixGenerator,
checkTags: fileCheckTags
};