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

   1 /*
   2 nofading-cgi.c
   3 The online interface for the fading enhancement tool
   4 04.12.2022
   5
   6 Copyright (C) 2015, 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 "nf.h"
  36
  37 int nofading (
  38         char *inpix, char *outpix,
  39         uint_fast32_t border,
  40         uint_fast8_t individual_channels,
  41         uint_fast8_t enhance_alpha,
  42         uint_fast8_t remove_alpha
  43 );
  44
  45 int main (int argc, char *argv[])
  46 {
  47         s_cgi *cgi;
  48         char in_tmp[256];
  49         char out_tmp[256];
  50         char *in_path;
  51         char *t;
  52         uint_fast32_t border;
  53         uint_fast8_t individual_channels, enhance_alpha, remove_alpha;
  54
  55         int r=0;
  56         int r1=0;
  57         int r2=0;
  58         int r3=0;
  59
  60         do {
  61                 make_tmp_path(in_tmp, 256, 0, "");
  62                 make_tmp_path(out_tmp, 256, 1, ".png");
  63
  64                 cgi=cgiInit();
  65
  66                 r = get_file(cgi,"inpix", in_tmp, &in_path);
  67                 if (r)
  68                         break;
  69
  70                 individual_channels = (cgiGetValue(cgi, "c")!=NULL) ? 0 : 1;
  71                 enhance_alpha = (cgiGetValue(cgi, "a")!=NULL) ? 1 : 0;
  72                 remove_alpha = (cgiGetValue(cgi, "n")!=NULL) ? 1 : 0;
  73
  74                 t = cgiGetValue(cgi, "f");
  75                 if (t != NULL)
  76                         sscanf(t,"%"SCNuFAST32, &border);
  77                 else
  78                         border = 0;
  79
  80                 r = nofading(
  81                         in_path, out_tmp,
  82                         border,
  83                         individual_channels, enhance_alpha, remove_alpha
  84                 );
  85                 if (r)
  86                         break;
  87                 r1 = send_file(out_tmp, "image/png", 0);
  88         } while (0);
  89         if (r)
  90         {
  91                 r1 = send_data(nf, nf_size, "image/png", 500);
  92         }
  93         r2 = rm(in_tmp);
  94         r3 = rm(out_tmp);
  95         if (r)
  96                 return r;
  97         if (r1)
  98                 return r1;
  99         if (r2)
 100                 return r2;
 101         if (r3)
 102                 return r3;
 103         return 0;
 104 }
 105
 106 int nofading (
 107         char *inpix, char *outpix,
 108         uint_fast32_t border,
 109         uint_fast8_t individual_channels,
 110         uint_fast8_t enhance_alpha,
 111         uint_fast8_t remove_alpha
 112 )
 113 {
 114         char s_border[11];
 115         pid_t sub;
 116         int r;
 117
 118         snprintf(s_border, 11, "%"PRIuFAST32, border);
 119
 120         sub = fork();
 121         if (sub == 0)
 122         {
 123                 r = execl(
 124                         NOFADING_PATH, NOFADING_PATH,
 125                         individual_channels ? "-c" : "-0",
 126                         enhance_alpha ? "-a" : "-0",
 127                         remove_alpha ? "-n" : "-0",
 128                         inpix, outpix,
 129                         s_border,
 130                         (char *)0
 131                 );
 132                 exit(r);
 133         }
 134         waitpid(sub, &r, 0);
 135         return r;
 136 }