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im_invalidate - flush caches related to an image
#include <vips/vips.h>
void im_invalidate( IMAGE *im )
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.
im_prepare(3)
, im_region_buffer(3)
.
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