imageAsCropped

// Kosso imageAsCropped
// added to TiBlob.m
// requires 4 arguments : x, y, width, height

- (id)imageAsCropped:(id)args
{
    [self ensureImageLoaded];
    if (image!=nil)
    {
        ENSURE_ARG_COUNT(args,4);
        NSUInteger x = [TiUtils intValue:[args objectAtIndex:0]];
        NSUInteger y = [TiUtils intValue:[args objectAtIndex:1]];
        NSUInteger width = [TiUtils intValue:[args objectAtIndex:2]];
        NSUInteger height = [TiUtils intValue:[args objectAtIndex:3]];
 
        return [[[TiBlob alloc] initWithImage:[UIImageResize croppedImage:CGRectMake(x, y, width, height) 
                                                                    image:image]] 
                autorelease];
    }
    return nil;
}
// end Kosso imageAsCropped

takeScreenshot

// Kosso screenshot
// replacement of takeScreenshot method in MediaModule.m
//
-(void)takeScreenshot:(id)arg
{
    ENSURE_UI_THREAD(takeScreenshot,arg);
    ENSURE_SINGLE_ARG(arg,KrollCallback);
 
    // Create a graphics context with the target size
    // On iOS 4 and later, use UIGraphicsBeginImageContextWithOptions to take the scale into consideration
    // On iOS prior to 4, fall back to use UIGraphicsBeginImageContext
 
    float systemVersion = [[[UIDevice currentDevice] systemVersion] floatValue];
 
    CGSize imageSize = [[UIScreen mainScreen] bounds].size;
        // this wasn't working properly in different iOS versions so just check for >= 4.0
    //if (NULL != UIGraphicsBeginImageContextWithOptions )
 
    if (systemVersion >= 4.0f)
        UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
    else
        UIGraphicsBeginImageContext(imageSize);
 
    CGContextRef context = UIGraphicsGetCurrentContext();
 
    // Iterate over every window from back to front
    for (UIWindow *window in [[UIApplication sharedApplication] windows]) 
    {
        if (![window respondsToSelector:@selector(screen)] || [window screen] == [UIScreen mainScreen])
        {
            // -renderInContext: renders in the coordinate space of the layer,
            // so we must first apply the layer's geometry to the graphics context
            CGContextSaveGState(context);
            // Center the context around the window's anchor point
            CGContextTranslateCTM(context, [window center].x, [window center].y);
            // Apply the window's transform about the anchor point
            CGContextConcatCTM(context, [window transform]);
            // Offset by the portion of the bounds left of and above the anchor point
            CGContextTranslateCTM(context,
                                  -[window bounds].size.width * [[window layer] anchorPoint].x,
                                  -[window bounds].size.height * [[window layer] anchorPoint].y);
 
            // Render the layer hierarchy to the current context
            [[window layer] renderInContext:context];
 
            // Restore the context
            CGContextRestoreGState(context);
        }
    }
 
    // Retrieve the screenshot image
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
 
    UIGraphicsEndImageContext();
 
    TiBlob *blob = [[[TiBlob alloc] initWithImage:image] autorelease];
    NSDictionary *event = [NSDictionary dictionaryWithObject:blob forKey:@"media"];
    [self _fireEventToListener:@"screenshot" withObject:event listener:arg thisObject:nil];
}
// end Kosso screenshot