I’m adding Dropbox support to my storyboarding application, and I use Acorn from Flying Meat Software to do most of my graphic work. A while back Gus Mueller (Mr. Flying Meat) posted a plugin to save Acorn native images in both retina display format and in “regular” format. To submit an app to Dropbox you should provide them with 16×16, 64×64, and 128×128 icons. What I did was take Gus’s plugin and created one to save an Acorn native image in these formats for Dropbox.
As Gus shared his code, so I share my little swizzle on his work: (file: Save@Dropbox.jstalk)
// This script requires Acorn 3.0 or later, and goes in your // ~/Library/Application Support/Acorn/Plug-Ins/ folder function main(ciimage, doc, layer) { // make sure the file is saved, and make sure it's saved // as an Acorn file. if (![doc fileURL] || !([[doc fileURL] pathExtension] == "acorn")) { return; } var path1 = [[[doc fileURL] path] stringByDeletingPathExtension] + "-16.png" var path2 = [[[doc fileURL] path] stringByDeletingPathExtension] + "-64.png" var path3 = [[[doc fileURL] path] stringByDeletingPathExtension] + "-128.png" // save our 128/128 first. [doc scaleImageToWidth:128]; var opts = {'uti': 'public.png', 'file': path3}; [doc webExportWithOptions:opts]; // scale our image to 64x64 size and save it. [doc scaleImageToWidth:64] var opts = {'uti': 'public.png', 'file': path2}; [doc webExportWithOptions:opts]; // Now save our 16x16 image. [doc scaleImageToWidth:16] var opts = {'uti': 'public.png', 'file': path1}; [doc webExportWithOptions:opts]; // undo the scale [doc undo]; }