- (IBAction)exportForJim:(id)sender {

    NSSavePanel *s = [NSSavePanel savePanel];

    NSString *startFileType = [[[self fileType] retain] autorelease];

    PXAssert(startFileType);

    if ([self fileURL]) {
        [s setNameFieldStringValue:[[self fileURL] lastPathComponent]];
    }
    else {
        [s setNameFieldStringValue:NSLocalizedString(@"Untitled", @"Untitled")];
    }

    [self prepareSavePanel:s forExport:YES];

    [s beginSheetModalForWindow:[[self windowController] window] completionHandler:^(NSInteger result) {

        if (!result) {
            return;
        }

        NSPopUpButton *saveFormats = [self windowController]->savePanelImageFormatButton;
        NSString *uti = [[saveFormats selectedItem] representedObject];

        CGImageRef ref = [self newCGImage];

        CGColorSpaceRef cs = CGColorSpaceCreateWithName(kCGColorSpaceGenericGray);

        CGContextRef context = CGBitmapContextCreate(nil, _canvasSize.width, _canvasSize.height, 8, 0, cs, kCGImageAlphaNone);

        CGColorSpaceRelease(cs);

        CGContextSetBlendMode(context, kCGBlendModeCopy);
        CGContextDrawImage(context, CGRectMake(0, 0, _canvasSize.width, _canvasSize.height), ref);
        CGContextSetBlendMode(context, kCGBlendModeNormal);

        CGImageRelease(ref);

        ref = CGBitmapContextCreateImage(context);

        TSWriteCGImageToFileWithUTI(ref, [s filename], uti);

        CGImageRelease(ref);

        CGContextRelease(context);

    }];
}



function main(image) {
    var acorn = NSApplication.sharedApplication();
    var doc = acorn.orderedDocuments()[0];
    [doc exportForJim:null];
}