nativescript-image-black-and-white/image-black-and-white.ios.js

A NativeScript plugin to apply a black-and-white filter on Image.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var image_source_1 = require("tns-core-modules/image-source");
var ImageBlackAndWhite = (function () {
    function ImageBlackAndWhite() {
    }
    ImageBlackAndWhite.prototype.blackAndWhite = function (img) {
        if (img.isLoading) {
            console.log('WARNING: Cannot apply filter if image is not yet loaded.');
        }
        var inputImage = CIImage.alloc().initWithCGImage(img.ios.image.CGImage);
        var filter = CIFilter.filterWithName('CIPhotoEffectMono');
        filter.setValueForKey(inputImage, kCIInputImageKey);
        filter.setDefaults();
        var filteredImg = filter.valueForKey(kCIOutputImageKey);
        var outputCGImage = new CIContext(null).createCGImageFromRect(filteredImg, filteredImg.extent);
        var outputUIImage = UIImage.imageWithCGImage(outputCGImage);
        img._oldSrc = img.src;
        img.src = image_source_1.fromNativeSource(outputUIImage);
    };
    ImageBlackAndWhite.prototype.clearFilter = function (img) {
        if (img.isLoading) {
            console.log('WARNING: Cannot remove filter if image is not yet loaded.');
        }
        if (img._oldSrc) {
            img.src = img._oldSrc;
        }
    };
    return ImageBlackAndWhite;
}());
exports.ImageBlackAndWhite = ImageBlackAndWhite;
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