:orphan:

.. _GIF-FI:

GIF-FI Static and animated gif (FreeImage)
==========================================

Extensions: ``.gif``

A format for reading and writing static and animated GIF, based
on the Freeimage library.

Images read with this format are always RGBA. Currently,
the alpha channel is ignored when saving RGB images with this
format.

Parameters for reading
----------------------
playback : bool
    'Play' the GIF to generate each frame (as 32bpp) instead of
    returning raw frame data when loading. Default True.

Parameters for saving
---------------------
loop : int
    The number of iterations. Default 0 (meaning loop indefinitely)
duration : {float, list}
    The duration (in seconds) of each frame. Either specify one value
    that is used for all frames, or one value for each frame.
    Note that in the GIF format the duration/delay is expressed in
    hundredths of a second, which limits the precision of the duration.
fps : float
    The number of frames per second. If duration is not given, the
    duration for each frame is set to 1/fps. Default 10.
palettesize : int
    The number of colors to quantize the image to. Is rounded to
    the nearest power of two. Default 256.
quantizer : {'wu', 'nq'}
    The quantization algorithm:
        * wu - Wu, Xiaolin, Efficient Statistical Computations for
          Optimal Color Quantization
        * nq (neuqant) - Dekker A. H., Kohonen neural networks for
          optimal color quantization
subrectangles : bool
    If True, will try and optimize the GIF by storing only the
    rectangular parts of each frame that change with respect to the
    previous. Unfortunately, this option seems currently broken
    because FreeImage does not handle DisposalMethod correctly.
    Default False.


