| /* im_LabS2Lab() |
| * |
| * 12/12/02 JC |
| * - adapted from im_LabS2LabQ() |
| * 2/11/09 |
| * - gtkdoc, cleanup |
| */ |
| |
| /* |
| |
| 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 <vips/vips.h> |
| |
| #ifdef WITH_DMALLOC |
| #include <dmalloc.h> |
| #endif /*WITH_DMALLOC*/ |
| |
| /* Convert n pels from signed short to Lab. |
| */ |
| void |
| imb_LabS2Lab( signed short *in, float *out, int n ) |
| { |
| signed short *p = in; |
| float *q = out; |
| int c; |
| |
| for( c = 0; c < n; c++ ) { |
| q[0] = p[0] / (32767.0 / 100.0); |
| q[1] = p[1] / (32768.0 / 128.0); |
| q[2] = p[2] / (32768.0 / 128.0); |
| |
| p += 3; |
| q += 3; |
| } |
| } |
| |
| /** |
| * im_LabS2Lab: |
| * @in: input image |
| * @out: output image |
| * |
| * Convert a LabS three-band signed short image to a three-band float image. |
| * |
| * See also: im_Lab2LabS(). |
| * |
| * Returns: 0 on success, -1 on error. |
| */ |
| int |
| im_LabS2Lab( IMAGE *in, IMAGE *out ) |
| { |
| if( im_check_uncoded( "im_LabS2Lab", in ) || |
| im_check_bands( "im_LabS2Lab", in, 3 ) || |
| im_check_format( "im_LabS2Lab", in, IM_BANDFMT_SHORT ) ) |
| return( -1 ); |
| |
| if( im_cp_desc( out, in ) ) |
| return( -1 ); |
| out->Type = IM_TYPE_LAB; |
| out->BandFmt = IM_BANDFMT_FLOAT; |
| |
| if( im_wrapone( in, out, |
| (im_wrapone_fn) imb_LabS2Lab, NULL, NULL ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |