Optional bitmapthe bitmap data of this frame
the delay of this frame in milliseconds
disposal method see DisposalMethod
the height of this frame in pixels
this frames image data
the position of the left edge of this frame, in pixels, within the gif (from the left edge)
the local color table for this frame
the text that will be displayed on screen with this frame (if not null)
reserved for future use (from packed field in image descriptor block)
if the colors in the local color table are ordered after decreasing importance
the position of the top edge of this frame, in pixels, within the gif (from the top edge)
if set waits for user input before rendering the next frame (timeout after delay if that is non-zero)
the width of this frame in pixels
reserved for future use (from packed field in graphics control extension block)