pctb/structure.h

   1 /*
   2  * Image canonicalisation function for use by callers feeding
   3  *  images into structure.c's routines.
   4  */
   5 /*
   6  *  This is part of ypp-sc-tools, a set of third-party tools for assisting
   7  *  players of Yohoho Puzzle Pirates.
   8  *
   9  *  Copyright (C) 2009 Ian Jackson <ijackson@chiark.greenend.org.uk>
  10  *
  11  *  This program is free software: you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation, either version 3 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23  *
  24  *  Yohoho and Puzzle Pirates are probably trademarks of Three Rings and
  25  *  are used without permission.  This program is not endorsed or
  26  *  sponsored by Three Rings.
  27  */
  28
  29 #ifndef STRUCTURE_H
  30 #define STRUCTURE_H
  31
  32
  33 #include "convert.h"
  34
  35
  36 typedef struct { char blue2[256]; } CanonColourInfoBlues;
  37 typedef struct { CanonColourInfoBlues *green2[256]; } CanonColourInfoGreens;
  38 typedef struct { CanonColourInfoGreens *red2[256]; } CanonColourInfoReds;
  39 extern CanonColourInfoReds canoncolourinfo_tree;
  40
  41 CanonImage *alloc_canon_image(int w, int h);
  42
  43 static inline char canon_lookup_colour(unsigned char r,
  44                                        unsigned char g,
  45                                        unsigned char b) {
  46   CanonColourInfoGreens *greens= canoncolourinfo_tree.red2[r];
  47   if (!greens) return '?';
  48   CanonColourInfoBlues *blues= greens->green2[g];
  49   if (!blues) return '?';
  50   return blues->blue2[b];
  51 }
  52
  53 #define CANONICALISE_IMAGE(im,w,h,rgb_save, COMPUTE_RGB) do{    \
  54     /* compute_rgb should be a number of statements, or         \
  55      * a block, which assigns to                                \
  56      *   Rgb rgb;                                               \
  57      * given the values of                                      \
  58      *   int x,y;                                               \
  59      * all of which are anamorphic.  Result is stored in im.    \
  60      * The COMPUTE_RGB is executed exactly once for             \
  61      * each pixel in reading order.                             \
  62      */                                                         \
  63     (im)= alloc_canon_image((w), (h));                          \
  64     (rgb_save)= alloc_rgb_image((w), (h));                      \
  65                                                                 \
  66     int x,y;                                                    \
  67     for (y=0; y<(h); y++) {                                     \
  68       for (x=0; x<(w); x++) {                                   \
  69         unsigned char r,g,b;                                    \
  70         COMPUTE_RGB;                                            \
  71         CANONIMG_ALSO_STORERGB((rgb_save));                     \
  72         (im)->d[y*(w) + x]= canon_lookup_colour(r,g,b);         \
  73       }                                                         \
  74       if (DEBUGP(rect)) {                                       \
  75         fprintf(debug, "%4d ",y);                               \
  76         fwrite(im->d + y*(w), 1,(w), debug);                    \
  77         fputc('\n',debug);                                      \
  78       }                                                         \
  79     }                                                           \
  80     debug_flush();                                              \
  81   }while(0)
  82
  83
  84 #define CANONIMG_ALSO_STORERGB(ri)              \
  85   do{                                           \
  86     unsigned char *rip= RI_PIXEL((ri),x,y);     \
  87     rip[0]= r;                                  \
  88     rip[1]= g;                                  \
  89     rip[2]= b;                                  \
  90   }while(0)
  91
  92
  93 #endif /*STRUCTURE_H*/