bicyclesonthemoon.info Git - ott/enhance/blob - diff-cgi.c

   1 /*
   2 diff-cgi.c
   3 The online interface for the differential tool
   4 05.12.2022
   5
   6 Copyright (C) 2022  Balthasar Szczepański
   7
   8 This program is free software: you can redistribute it and/or modify
   9 it under the terms of the GNU Affero General Public License as
  10 published by the Free Software Foundation, either version 3 of the
  11 License, or (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU Affero General Public License for more details.
  17
  18 You should have received a copy of the GNU Affero General Public License
  19 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 Requires cgilib (http://www.infodrom.org/projects/cgilib/)
  22 */
  23
  24 #include <stdio.h>
  25 #include <stdint.h>
  26 #include <unistd.h>
  27 #include <stdlib.h>
  28 #include <sys/wait.h>
  29 #include <stdint.h>
  30 #include <inttypes.h>
  31
  32 #include <cgi.h>
  33
  34 #include "online-core.h"
  35 #include "df.h"
  36
  37 #define RA 0x00
  38 #define GA 0x57
  39 #define BA 0xAF
  40 #define RB 0xBB
  41 #define GB 0x66
  42 #define BB 0x22
  43
  44 int diff (
  45         char *inpix0, char *inpix1, char *outpix,
  46         uint_fast8_t ra, uint_fast8_t ga, uint_fast8_t ba,
  47         uint_fast8_t rb, uint_fast8_t gb, uint_fast8_t bb
  48 );
  49
  50 int main (int argc, char *argv[])
  51 {
  52         s_cgi *cgi;
  53         char in0_tmp[256];
  54         char in1_tmp[256];
  55         char out_tmp[256];
  56         char *in0_path;
  57         char *in1_path;
  58         char *t;
  59         uint_fast8_t ra, ga, ba, rb, gb, bb;
  60
  61         int r=0;
  62         int r1=0;
  63         int r2=0;
  64         int r3=0;
  65         int r4=0;
  66
  67         do {
  68                 make_tmp_path(in0_tmp, 256, 0, "");
  69                 make_tmp_path(in1_tmp, 256, 1, "");
  70                 make_tmp_path(out_tmp, 256, 2, ".png");
  71
  72                 cgi=cgiInit();
  73
  74                 r = get_file(cgi,"inpixf0", in0_tmp, &in0_path);
  75                 if (r)
  76                         r = get_file(cgi,"inpix0", in0_tmp, &in0_path);
  77                 if (r)
  78                         break;
  79
  80                 r = get_file(cgi,"inpixf1", in1_tmp, &in1_path);
  81                 if (r)
  82                         r = get_file(cgi,"inpix1", in1_tmp, &in1_path);
  83                 if (r)
  84                         break;
  85
  86                 t = cgiGetValue(cgi, "ra");
  87                 if (t != NULL)
  88                         sscanf(t,"%"SCNuFAST8, &ra);
  89                 else
  90                         ra = RA;
  91
  92                 t = cgiGetValue(cgi, "ga");
  93                 if (t != NULL)
  94                         sscanf(t,"%"SCNuFAST8, &ga);
  95                 else
  96                         ga = GA;
  97
  98                 t = cgiGetValue(cgi, "ba");
  99                 if (t != NULL)
 100                         sscanf(t,"%"SCNuFAST8, &ba);
 101                 else
 102                         ba = BA;
 103
 104                 t = cgiGetValue(cgi, "rb");
 105                 if (t != NULL)
 106                         sscanf(t,"%"SCNuFAST8, &rb);
 107                 else
 108                         rb = RB;
 109
 110                 t = cgiGetValue(cgi, "gb");
 111                 if (t != NULL)
 112                         sscanf(t,"%"SCNuFAST8, &gb);
 113                 else
 114                         gb = GB;
 115
 116                 t = cgiGetValue(cgi, "bb");
 117                 if (t != NULL)
 118                         sscanf(t,"%"SCNuFAST8, &bb);
 119                 else
 120                         bb = BB;
 121
 122                 r = diff(in0_path, in1_path, out_tmp, ra, ga, ba, rb, gb, bb);
 123                 if (r)
 124                         break;
 125
 126                 r1 = send_file(out_tmp, "image/png", 0);
 127         } while (0);
 128         if (r)
 129         {
 130                 r1 = send_data(df, df_size, "image/png", 500);
 131         }
 132         r2 = rm(in0_tmp);
 133         r3 = rm(in1_tmp);
 134         r4 = rm(out_tmp);
 135         if (r1)
 136                 return r1;
 137         if (r2)
 138                 return r2;
 139         if (r3)
 140                 return r3;
 141         if (r4)
 142                 return r4;
 143         return 0;
 144 }
 145
 146 int diff (
 147         char *inpix0, char *inpix1, char *outpix,
 148         uint_fast8_t ra, uint_fast8_t ga, uint_fast8_t ba,
 149         uint_fast8_t rb, uint_fast8_t gb, uint_fast8_t bb
 150 )
 151 {
 152         char s_ra[4];
 153         char s_ga[4];
 154         char s_ba[4];
 155         char s_rb[4];
 156         char s_gb[4];
 157         char s_bb[4];
 158
 159         pid_t sub;
 160         int r;
 161
 162         snprintf(s_ra, 4, "%"PRIuFAST8, ra);
 163         snprintf(s_ga, 4, "%"PRIuFAST8, ga);
 164         snprintf(s_ba, 4, "%"PRIuFAST8, ba);
 165         snprintf(s_rb, 4, "%"PRIuFAST8, rb);
 166         snprintf(s_gb, 4, "%"PRIuFAST8, gb);
 167         snprintf(s_bb, 4, "%"PRIuFAST8, bb);
 168
 169         sub = fork();
 170         if (sub == 0)
 171         {
 172                 r = execl(
 173                         DIFF_PATH, DIFF_PATH,
 174                         inpix0, inpix1, outpix,
 175                         s_ra, s_ga, s_ba,
 176                         s_rb, s_gb, s_bb,
 177                         (char *)0
 178                 );
 179                 exit(r);
 180         }
 181         waitpid(sub, &r, 0);
 182         return r;
 183 }
 184
 185