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Add an index for edge-detection algorithms.

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* doc/lispref/display.texi (Image Descriptors): Add an index for edge-detection algorithms.
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Xue Fuqiao 2013-10-27 12:40:16 +08:00
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doc/lispref/ChangeLog
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@ -1,3 +1,7 @@
2013-10-27 Xue Fuqiao <xfq.free@gmail.com>
* display.texi (Image Descriptors): Add an index for edge-detection algorithms.
2013-10-26 Xue Fuqiao <xfq.free@gmail.com>
* display.texi (Fringe Indicators): Add indexes for fringe indicators.

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doc/lispref/display.texi
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@ -4132,6 +4132,7 @@ Here are the possibilities for @var{height}:
@table @asis
@item @code{(+ @var{n})}
@c FIXME: Add an index for "step"? --xfq
This means to use a font that is @var{n} steps larger. A ``step'' is
defined by the set of available fonts---specifically, those that match
what was otherwise specified for this text, in all attributes except
@ -4412,6 +4413,7 @@ sometimes consider this useful for displaying the image for a
``disabled'' button.
@item (edge-detection :matrix @var{matrix} :color-adjust @var{adjust})
@cindex edge detection, images
Specifies a general edge-detection algorithm. @var{matrix} must be
either a nine-element list or a nine-element vector of numbers. A pixel
at position @math{x/y} in the transformed image is computed from