lqr_carver_resize — liquid rescale a LqrCarver
object
#include <lqr.h>
LqrRetVal lqr_carver_resize( | LqrCarver* carver, |
gint new_width, | |
gint new_height) ; |
The function lqr_carver_resize
performs the liquid
rescaling over the LqrCarver
object pointed to by carver
.
If a visibility map was loaded through the function lqr_vmap_load
,
and the carver was not initialized, the resizing operations must be limited to the direction
and the sizes included in the loaded map.
If the carver was initialized through the function
lqr_carver_init
, the only limitation to the operations
is that the final size must not exceed twice the original size in any of
the two dimensions (the original size is reset by the function
lqr_carver_flatten
).
The resizing function can be called multiple times, and it will decide
automatically whether the computation of the visibility map is necessary
or not. In case it isn't, the function returns almost immediately, otherwise
operations will proceed following the order given through the function
lqr_carver_set_resize_order
.
Currently, on-the-fly rescaling without computation is only possible
for a single direction at a time.
Whenever the resizing dirction change (this may happen
in a single call of the rescaling function or through multiple calls), the
visibility map computed during the first direction rescale is dropped to
make place for the one for the second. These visibility maps can be
saved by using the lqr_carver_set_vmap_dump
function,
for inspection or future use.