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src/main/curve-cache.c

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00001 /*
00002  * "$Id: curve-cache.c,v 1.4 2004/05/07 19:20:29 rleigh Exp $"
00003  *
00004  *   Gimp-Print color management module - traditional Gimp-Print algorithm.
00005  *
00006  *   Copyright 1997-2000 Michael Sweet (mike@easysw.com) and
00007  *      Robert Krawitz (rlk@alum.mit.edu)
00008  *
00009  *   This program is free software; you can redistribute it and/or modify it
00010  *   under the terms of the GNU General Public License as published by the Free
00011  *   Software Foundation; either version 2 of the License, or (at your option)
00012  *   any later version.
00013  *
00014  *   This program is distributed in the hope that it will be useful, but
00015  *   WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
00016  *   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
00017  *   for more details.
00018  *
00019  *   You should have received a copy of the GNU General Public License
00020  *   along with this program; if not, write to the Free Software
00021  *   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00022  */
00023 
00024 /*
00025  * This file must include only standard C header files.  The core code must
00026  * compile on generic platforms that don't support glib, gimp, gtk, etc.
00027  */
00028 
00029 #ifdef HAVE_CONFIG_H
00030 #include <config.h>
00031 #endif
00032 #include <gimp-print/gimp-print.h>
00033 #include "gimp-print-internal.h"
00034 #include <gimp-print/gimp-print-intl-internal.h>
00035 #include <gimp-print/curve-cache.h>
00036 #include <math.h>
00037 #ifdef HAVE_LIMITS_H
00038 #include <limits.h>
00039 #endif
00040 #include <string.h>
00041 
00042 void
00043 stp_curve_free_curve_cache(stp_cached_curve_t *cache)
00044 {
00045   if (cache->curve)
00046     stp_curve_destroy(cache->curve);
00047   cache->curve = NULL;
00048   cache->d_cache = NULL;
00049   cache->s_cache = NULL;
00050   cache->count = 0;
00051 }
00052 
00053 void
00054 stp_curve_cache_curve_data(stp_cached_curve_t *cache)
00055 {
00056   if (cache->curve && !cache->d_cache)
00057     {
00058       cache->s_cache = stp_curve_get_ushort_data(cache->curve, &(cache->count));
00059       cache->d_cache = stp_curve_get_data(cache->curve, &(cache->count));
00060     }
00061 }
00062 
00063 stp_curve_t *
00064 stp_curve_cache_get_curve(stp_cached_curve_t *cache)
00065 {
00066   return cache->curve;
00067 }
00068 
00069 void
00070 stp_curve_cache_curve_invalidate(stp_cached_curve_t *cache)
00071 {
00072   cache->d_cache = NULL;
00073   cache->s_cache = NULL;
00074   cache->count = 0;
00075 }
00076 
00077 void
00078 stp_curve_cache_set_curve(stp_cached_curve_t *cache, stp_curve_t *curve)
00079 {
00080   stp_curve_cache_curve_invalidate(cache);
00081   cache->curve = curve;
00082 }
00083 
00084 void
00085 stp_curve_cache_set_curve_copy(stp_cached_curve_t *cache, const stp_curve_t *curve)
00086 {
00087   stp_curve_cache_curve_invalidate(cache);
00088   cache->curve = stp_curve_create_copy(curve);
00089 }
00090 
00091 const size_t
00092 stp_curve_cache_get_count(stp_cached_curve_t *cache)
00093 {
00094   if (cache->curve)
00095     {
00096       if (!cache->d_cache)
00097         cache->d_cache = stp_curve_get_data(cache->curve, &(cache->count));
00098       return cache->count;
00099     }
00100   else
00101     return 0;
00102 }
00103 
00104 const unsigned short *
00105 stp_curve_cache_get_ushort_data(stp_cached_curve_t *cache)
00106 {
00107   if (cache->curve)
00108     {
00109       if (!cache->s_cache)
00110         cache->s_cache =
00111           stp_curve_get_ushort_data(cache->curve, &(cache->count));
00112       return cache->s_cache;
00113     }
00114   else
00115     return NULL;
00116 }
00117 
00118 const double *
00119 stp_curve_cache_get_double_data(stp_cached_curve_t *cache)
00120 {
00121   if (cache->curve)
00122     {
00123       if (!cache->d_cache)
00124         cache->d_cache = stp_curve_get_data(cache->curve, &(cache->count));
00125       return cache->d_cache;
00126     }
00127   else
00128     return NULL;
00129 }
00130 
00131 void
00132 stp_curve_cache_copy(stp_cached_curve_t *dest, const stp_cached_curve_t *src)
00133 {
00134   stp_curve_cache_curve_invalidate(dest);
00135   if (dest != src)
00136     {
00137       if (src->curve)
00138         stp_curve_cache_set_curve_copy(dest, src->curve);
00139     }
00140 }
00141 

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