APIs missing: exporting Images

[matteogratton]

Exporting images at the moment is pretty complex.

1. We don't have the original Image name
   Images are stored only with an ID: it would be nice to have also their original name

2. We don't have an easy way to read them
   a. To read an image from a pattern fill:
   let patternImage = fill._object.image().treeAsDictionary().sha1;
   b. To find the ID of an image from an image layer:
   let patternImageID = fill._object.image().treeAsDictionary().sha1;
   it is easier if it is an image layer or an override of an image layer

let imageID = layer.image.id

let imageID
if (override.property == "image") {
    imageID = String(override.value.id)
}

3. We don't have an easy way to export them
   To export an image is more complex, as the stored image values are a native NSImage object.
   I found a few ways to do it, the easiest one is the one coming from Automate (and export them as PNGs or JPEGs based on the function of choice:

let imageData = layer.image; [or layer.fills[0].pattern.image]
let path = [path of a folder of choice]

function exportImageDataAsPng(imageData, path) {
    var rep = NSBitmapImageRep.imageRepWithData(imageData.nsdata);
    var png = rep.representationUsingType_properties(
        NSBitmapImageFileTypePNG,
        {}
    );
    png.writeToFile_atomically(path, "YES");
}

function exportImageDataAsJpg(imageData, path, quality) {
    var rep = NSBitmapImageRep.imageRepWithData(imageData.nsdata);
    var jpg = rep.representationUsingType_properties(
        NSBitmapImageFileTypeJPEG,
        { NSImageCompressionFactor: quality || 0.75 }
    );
    jpg.writeToFile_atomically(path, "YES");
}

It would be nice to be able to export images with their original name (I understand it will not possible to export them with the original filetype):

let imageToExport = layer.image.export(path);
or
let imageToExport = layer.fills[0].pattern.export(path);

[rodionovd]

Thank for filing, would be great to see improvements in this area! See also this thread about current struggles with default exportOptions for ideas.