git.mutantstargoat.com Git - ansitris/blob - src/ansi.c

   1 #include <stdio.h>
   2 #include <string.h>
   3
   4 enum {
   5         CS_ASCII = 'B',
   6         CS_GRAPH = '0'
   7 };
   8
   9 #define GMAP_FIRST      0xb0
  10 #define GMAP_LAST       0xda
  11
  12 unsigned char gmap[] = {
  13         0x61, 0x61, 0x61,               /* checker */
  14         0x78,                                   /* vline */
  15         0x75, 0x75, 0x75,               /* right T */
  16         0x6b, 0x6b,                             /* upper-right corner */
  17         0x75,                                   /* right T */
  18         0x78,                                   /* vline */
  19         0x6b,                                   /* upper-right corner */
  20         0x6a, 0x6a, 0x6a,               /* lower-right corner */
  21         0x6b,                                   /* upper-right corner */
  22         0x6d,                                   /* lower-left corner */
  23         0x76,                                   /* bottom T */
  24         0x77,                                   /* top T */
  25         0x74,                                   /* left T */
  26         0x71,                                   /* hline */
  27         0x6e,                                   /* cross */
  28         0x74, 0x74,                             /* left T */
  29         0x6d,                                   /* lower-left corner */
  30         0x6c,                                   /* upper-left corner */
  31         0x76,                                   /* bottom T */
  32         0x77,                                   /* top T */
  33         0x74,                                   /* left T */
  34         0x71,                                   /* hline */
  35         0x6e,                                   /* cross */
  36         0x76, 0x76,                             /* bottom T */
  37         0x77, 0x77,                             /* top T */
  38         0x6d, 0x6d,                             /* lower-left corner */
  39         0x6c, 0x6c,                             /* upper-left corner */
  40         0x6e, 0x6e,                             /* cross */
  41         0x6a,                                   /* lower-right corner */
  42         0x6c                                    /* upper-left corner */
  43 };
  44
  45 static unsigned char cmap[] = {0, 4, 2, 6, 1, 5, 3, 7};
  46
  47 static unsigned char cur_attr = 0xff;
  48 static int cur_cs = CS_ASCII;
  49
  50 void ansi_reset(void)
  51 {
  52         fputs("\033c", stdout);
  53         fflush(stdout);
  54 }
  55
  56 void ansi_clearscr(void)
  57 {
  58         fputs("\033[2J", stdout);
  59 }
  60
  61 void ansi_setcursor(int row, int col)
  62 {
  63         printf("\033[%d;%dH", row + 1, col + 1);
  64 }
  65
  66 void ansi_ibmchar(unsigned char c, unsigned char attr)
  67 {
  68         char cmd[32];
  69         char *ptr = cmd;
  70
  71         if(c >= GMAP_FIRST && c <= GMAP_LAST) {
  72                 if(cur_cs == CS_ASCII) {
  73                         memcpy(ptr, "\033(0", 3);
  74                         ptr += 3;
  75                         cur_cs = CS_GRAPH;
  76                 }
  77
  78                 c = gmap[c - GMAP_FIRST];
  79         } else {
  80                 if(cur_cs == CS_GRAPH) {
  81                         memcpy(ptr, "\033(B", 3);
  82                         ptr += 3;
  83                         cur_cs = CS_ASCII;
  84                 }
  85         }
  86
  87         if(attr != cur_attr) {
  88                 unsigned char fg = cmap[attr & 7];
  89                 unsigned char bg = cmap[(attr >> 4) & 7];
  90
  91                 ptr += sprintf(ptr, "\033[;%d;%dm", fg + 30, bg + 40);
  92                 cur_attr = attr;
  93         }
  94
  95         *ptr++ = c;
  96         *ptr = 0;
  97
  98         fputs(cmd, stdout);
  99 }