Method
VipsRegionprepare
Declaration [src]
int
vips_region_prepare (
VipsRegion* reg,
const VipsRect* r
)
Description [src]
vips_region_prepare() fills reg with pixels. After calling,
you can address at least the area r with VIPS_REGION_ADDR() and get
valid pixels.
vips_region_prepare() runs in-line, that is, computation is done by
the calling thread, no new threads are involved, and computation
blocks until the pixels are ready.
Use vips_sink_screen() to calculate an area of pixels in the background.
See also