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Document how to check for ImageMagick support

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* doc/lispref/display.texi (ImageMagick Images): Say how to
check for ImageMagick support, which isn't quite obvious
(bug#20702).
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Lars Ingebrigtsen 2016-04-30 21:39:21 +02:00
parent 970b82b2b2
commit faf07d6465
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doc/lispref/display.texi
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@ -5145,6 +5145,12 @@ Conveniences,,, emacs, The GNU Emacs Manual}). The image type symbol
for images loaded via ImageMagick is @code{imagemagick}, regardless of
the actual underlying image format.
To check for ImageMagick support, use the following:
@lisp
(image-type-available-p 'imagemagick)
@end lisp
@defun imagemagick-types
This function returns a list of image file extensions supported by the
current ImageMagick installation. Each list element is a symbol