Saving plot as Raw RGBA format generates an image-less file

[smk78]

Saving a plot as Raw RGBA format generates a file but the file does not appear to contain any image! See attached.

[smk78]

Raw RGBA format file

[lewis]

Also raises an exception:

Matplotlib backend_wx error: 'unicode' object has no attribute 'close'

[lewis]

Both SasView 3.1.2 and the current Jenkins build produce the correct image file, just with the wrong extension (.raw instead of .rgba)

The attached image.rgba file is an example output. This can be converted to .png file using ImageMagick:

magick convert -size 935x635 -depth 8 image.rgba export.png

Which produces the attached export.png image

[lewis]

Raw rgba formats are useless unless the user knows the dimensions and pixel depth of the image. These need to be added to the documentation somewhere:

Dimensions: 935x635 pixels
Pixel Depth: 8

[pkienzle]

could remove rgb and rgba formats using:

    from matplotlib import backend_bases
    backend_bases._default_filetypes.pop('raw', None)
    backend_bases._default_filetypes.pop('rgba', None)

probably in sasview.py

[smk78]

Have updated /sasview/src/sas/sasgui/guiframe/media/graph_help.rst to say:

RAW/RGBA (bitmap, stored as 935x635 pixels of depth 8)