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/* Functions to create offsets for rotating square masks.
*
* Author: N. Dessipris (Copyright, N. Dessipris 1991)
* Written on: 08/05/1991
* Modified on: 28/05/1991
* 12/10/95 JC
* - small revisions, needs rewriting really
* 7/8/96 JC
* - absolutely foul desp code revised
* - many bugs and mem leaks fixed
* 1/3/99 JC
* - oops, fns were not preserving scale and offset
* 1/12/10
* - allow any size mask for the 90 degree rotates by using im_rot90().
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
#define PIM_RINT 1
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <glib/gi18n-lib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <vips/vips.h>
#include <vips/vips7compat.h>
/* The type of the vips operations we support.
*/
typedef int (*vips_fn)( IMAGE *in, IMAGE *out );
/* Pass a mask through a vips operation, eg. im_rot90().
*/
static INTMASK *
vapplyimask( INTMASK *in, const char *name, vips_fn fn )
{
IMAGE *x;
IMAGE *t[2];
DOUBLEMASK *d[2];
INTMASK *out;
if( !(x = im_open( name, "p" )) )
return( NULL );
if( !(d[0] = im_local_dmask( x, im_imask2dmask( in, name ) )) ||
im_open_local_array( x, t, 2, name, "p" ) ||
im_mask2vips( d[0], t[0] ) ||
fn( t[0], t[1] ) ||
!(d[1] = im_local_dmask( x, im_vips2mask( t[1], name ) )) ||
!(out = im_dmask2imask( d[1], name )) ) {
im_close( x );
return( NULL );
}
im_close( x );
out->scale = in->scale;
out->offset = in->offset;
return( out );
}
static DOUBLEMASK *
vapplydmask( DOUBLEMASK *in, const char *name, vips_fn fn )
{
IMAGE *x;
IMAGE *t[2];
DOUBLEMASK *out;
if( !(x = im_open( name, "p" )) )
return( NULL );
if( im_open_local_array( x, t, 2, name, "p" ) ||
im_mask2vips( in, t[0] ) ||
fn( t[0], t[1] ) ||
!(out = im_vips2mask( t[1], name )) ) {
im_close( x );
return( NULL );
}
im_close( x );
out->scale = in->scale;
out->offset = in->offset;
return( out );
}
INTMASK *
im_rotate_imask90( INTMASK *in, const char *filename )
{
return( vapplyimask( in, filename, im_rot90 ) );
}
DOUBLEMASK *
im_rotate_dmask90( DOUBLEMASK *in, const char *filename )
{
return( vapplydmask( in, filename, im_rot90 ) );
}
static int
im_rot45( IMAGE *in, IMAGE *out )
{
VipsImage *t;
if( vips_rot45( in, &t, NULL ) )
return( -1 );
if( vips_image_write( t, out ) ) {
g_object_unref( t );
return( -1 );
}
g_object_unref( t );
return( 0 );
}
INTMASK *
im_rotate_imask45( INTMASK *in, const char *filename )
{
return( vapplyimask( in, filename, im_rot45 ) );
}
DOUBLEMASK *
im_rotate_dmask45( DOUBLEMASK *in, const char *filename )
{
return( vapplydmask( in, filename, im_rot45 ) );
}
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