127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
/* @(#) Function to write an IMAGE to a DOUBLEMASK. One band IM_BANDFMT_DOUBLE
|
|
* @(#) images, or n-band by 1 pixel double images.
|
|
* @(#)
|
|
* @(#) DOUBLEMASK *
|
|
* @(#) im_vips2mask( IMAGE *in, char *out )
|
|
* @(#)
|
|
* @(#) The function returns NULL on error and a new DOUBLEMASK on success
|
|
* Author: J.Cupitt
|
|
* Written on: 6/6/94
|
|
* Modified on:
|
|
*
|
|
* 16/10/06
|
|
* - allow 1xn-band images too
|
|
* 23/2/07
|
|
* - oop, broken for nx1 m-band images
|
|
* - now casts to double for you
|
|
*/
|
|
|
|
/*
|
|
|
|
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
*/
|
|
|
|
/*
|
|
|
|
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
|
|
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif /*HAVE_CONFIG_H*/
|
|
#include <vips/intl.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <vips/vips.h>
|
|
|
|
#ifdef WITH_DMALLOC
|
|
#include <dmalloc.h>
|
|
#endif /*WITH_DMALLOC*/
|
|
|
|
DOUBLEMASK *
|
|
im_vips2mask( IMAGE *in, const char *outname )
|
|
{
|
|
int width, height;
|
|
DOUBLEMASK *out;
|
|
|
|
/* double* only: cast if necessary.
|
|
*/
|
|
if( in->BandFmt != IM_BANDFMT_DOUBLE ) {
|
|
IMAGE *t;
|
|
|
|
if( !(t = im_open( "im_vips2mask", "p" )) )
|
|
return( NULL );
|
|
if( im_clip2d( in, t ) ||
|
|
!(out = im_vips2mask( t, outname )) ) {
|
|
im_close( t );
|
|
return( NULL );
|
|
}
|
|
im_close( t );
|
|
|
|
return( out );
|
|
}
|
|
|
|
/* Check the image.
|
|
*/
|
|
if( im_incheck( in ) )
|
|
return( NULL );
|
|
if( in->Coding != IM_CODING_NONE ) {
|
|
im_error( "im_vips2mask", "%s", _( "uncoded images only" ) );
|
|
return( NULL );
|
|
}
|
|
if( in->Bands == 1 ) {
|
|
width = in->Xsize;
|
|
height = in->Ysize;
|
|
}
|
|
else if( in->Xsize == 1 ) {
|
|
width = in->Bands;
|
|
height = in->Ysize;
|
|
}
|
|
else if( in->Ysize == 1 ) {
|
|
width = in->Xsize;
|
|
height = in->Bands;
|
|
}
|
|
else {
|
|
im_error( "im_vips2mask",
|
|
"%s", _( "one band, nx1, or 1xn images only" ) );
|
|
return( NULL );
|
|
}
|
|
|
|
if( !(out = im_create_dmask( outname, width, height )) )
|
|
return( NULL );
|
|
if( in->Bands > 1 && in->Ysize == 1 ) {
|
|
double *data = (double *) in->data;
|
|
int x, y;
|
|
|
|
/* Need to transpose: the image is RGBRGBRGB, we need RRRGGGBBB.
|
|
*/
|
|
for( y = 0; y < height; y++ )
|
|
for( x = 0; x < width; x++ )
|
|
out->coeff[x + y * width] =
|
|
data[x * height + y];
|
|
}
|
|
else
|
|
memcpy( out->coeff, in->data,
|
|
width * height * sizeof( double ) );
|
|
|
|
return( out );
|
|
}
|
|
|