This is a nodejs wrapper for pngdefry command line tool that reverses the optimisation XCode does on png images included into iPA files to make the images readable by the browser.
If you want for any reason to extract App Icons (PNG images ) out of iPA files ( iOS Apps ) you will need this ; because you gonna find that those extracted PNG images are not readable by the browser .
Apple uses PNGCursh open source library to crush png images inside iPA files , to reverse this process back you need to do it throw pngdefy lib ,
- OSX (Drawin) : Must have built tools ( config , make ) installed.
- Linux.
var PNGDDefry = require("node-pngdefry");
var source_image_file = __dirname + "/AppIcon57x57.png";
var destination_direcotry = __dirname + "/output";
var suffix = null;
var png_converter = new PNGDDefry();
png_converter.convert(source_image_file, destination_direcotry, null, function (err, output_image_path) {
console.log(err);
console.log(output_image_path);
});- source_image_file : the source for the png image to be deferd by the library.
- destination_directory : the destination directory where the result image need to be saved , by default it is saved by the original image name.
- suffix : in case you want to save it in the same original image directory , you need to may use this argumant to add a suffix to the saved image name.
A test script is added under tests directory :
-
First open the image under /tests directory by the browser other than safari , it will not be displayed.
-
Run this commands inside the module root directory
npm install
npm test -
If you have successfully installed the package ,the test should pass and new image with the same name should be created under tests/output directory .
-
Open the image with your browser it should be displayed.