116 lines
2.5 KiB
C
116 lines
2.5 KiB
C
/* @(#) Turn displayable rgb files to XYZ.
|
|
* @(#)
|
|
* @(#) Usage:
|
|
* @(#) im_disp2XYZ( imagein, imageout, display )
|
|
* @(#) IMAGE *imagein, *imageout;
|
|
* @(#) struct im_col_display *display;
|
|
* @(#)
|
|
* @(#) uchar in, float out.
|
|
* @(#)
|
|
* @(#) Returns: -1 on error, else 0
|
|
* Modified:
|
|
* 15/11/94 JC
|
|
* - memory leak fixed
|
|
* - error message added
|
|
* 16/11/94 JC
|
|
* - partialed
|
|
*/
|
|
|
|
/*
|
|
|
|
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 <stdio.h>
|
|
#include <math.h>
|
|
|
|
#include <vips/vips.h>
|
|
|
|
#ifdef WITH_DMALLOC
|
|
#include <dmalloc.h>
|
|
#endif /*WITH_DMALLOC*/
|
|
|
|
/* Convert a buffer.
|
|
*/
|
|
void
|
|
imb_disp2XYZ( PEL *p, float *q, int n,
|
|
struct im_col_display *d, struct im_col_tab_disp *table )
|
|
{
|
|
int x;
|
|
|
|
for( x = 0; x < n; x++ ) {
|
|
int r = p[0];
|
|
int g = p[1];
|
|
int b = p[2];
|
|
float X, Y, Z;
|
|
p += 3;
|
|
|
|
im_col_rgb2XYZ(d, table, r, g, b, &X, &Y, &Z);
|
|
|
|
q[0] = X;
|
|
q[1] = Y;
|
|
q[2] = Z;
|
|
q += 3;
|
|
}
|
|
}
|
|
|
|
int
|
|
im_disp2XYZ( IMAGE *in, IMAGE *out, struct im_col_display *d )
|
|
{
|
|
struct im_col_tab_disp *table; /* pointer to the lookup tables */
|
|
|
|
/* Check input image.
|
|
*/
|
|
if( in->Bands != 3 || in->BandFmt != IM_BANDFMT_UCHAR ||
|
|
in->Coding != IM_CODING_NONE ) {
|
|
im_errormsg( "im_disp2XYZ: input not 3-band uncoded char" );
|
|
return( -1 );
|
|
}
|
|
|
|
/* Prepare the output image
|
|
*/
|
|
if( im_cp_desc( out, in ) )
|
|
return( -1 );
|
|
out->Bbits = IM_BBITS_FLOAT;
|
|
out->BandFmt = IM_BANDFMT_FLOAT;
|
|
out->Type = IM_TYPE_XYZ;
|
|
|
|
/* Prepare the lookup tables
|
|
*/
|
|
table = im_col_make_tables_RGB( out, d );
|
|
|
|
/* Do the processing.
|
|
*/
|
|
if( im_wrapone( in, out,
|
|
(im_wrapone_fn) imb_disp2XYZ, d, table ) )
|
|
return( -1 );
|
|
|
|
return( 0 );
|
|
}
|