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doc polish

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This commit is contained in:
John Cupitt 2014-11-11 09:59:51 +00:00
parent 70e470b0a5
commit 8a545ab6c4
1 changed files with 7 additions and 2 deletions
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9
libvips/iofuncs/operation.c
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@ -103,11 +103,16 @@
* error .. * error ..
* ]| * ]|
* *
* This will invert @im and return it as a new #VipsImage, @t1. As the caller * This will invert @im and return a new #VipsImage, @t1. As the caller
* of vips_invert(), you are responsible for @t1 and must unref it when you no * of vips_invert(), you are responsible for @t1 and must unref it when you no
* longer need it. If vips_invert() fails, no @t1 is returned and you don't * longer need it. If vips_invert() fails, no @t1 is returned and you don't
* need to do anything. * need to do anything.
* *
* If you don't need to use @im for another operation,
* you can unref @im immediately after the call. If @im is needed to calculate
* @t1, vips_invert() will add a ref to @im and automatically drop it when @t1
* is unreffed.
*
* Consider running two operations, one after the other. You could write: * Consider running two operations, one after the other. You could write:
* *
* |[ * |[
@ -148,7 +153,7 @@
* ## The #VipsOperation cache * ## The #VipsOperation cache
* *
* Because all #VipsObject are immutable, they can be cached. The cache is * Because all #VipsObject are immutable, they can be cached. The cache is
* very simple to use: instead of calling vips_object_build(), instead call * very simple to use: instead of calling vips_object_build(), call
* vips_cache_operation_build(). This function calculates a hash from the * vips_cache_operation_build(). This function calculates a hash from the
* operations's input arguments and looks it up in table of all recent * operations's input arguments and looks it up in table of all recent
* operations. If there's a hit, the new operation is unreffed, the old * operations. If there's a hit, the new operation is unreffed, the old