libvips/man/im_invalidate.3

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Groff

.TH IM_INVALIDATE 3 "5 December 2006"
.SH NAME
im_invalidate \- flush caches related to an image
.SH SYNOPSIS
.B #include <vips/vips.h>
.B void im_invalidate( IMAGE *im )
.SH DESCRIPTION
.B im_invalidate(3)
marks all caches related to the image as invalid and requring recalculation.
It needs to be called if an image changes after being made: for example, after
a paint action, or perhaps after a new frame has arrived from a video source.
Any invalidate callbacks registered on any of the affected images are
triggered.
.SH SEE\ ALSO
im_prepare(3), im_region_buffer(3), im_add_invalidate_callback(3).