graphics.c

   1 /* Graficke funkcie pre vdt52s */
   2 /* */
   3
   4 #include "parita.h"
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <unistd.h>
   9
  10 #include "vt52vnc.h"
  11
  12 #define ESC     0x1b
  13
  14 #define PAR(x)  ((x) | (128-parity_table[(x) & 0x7f]))
  15
  16 #define HIGH_Y(n)       (PAR(0x20|(n)))
  17 #define LOW_Y(n)        (PAR(0x60|(n)))
  18 #define HIGH_X(n)       (PAR(0x20|(n)))
  19 #define LOW_X(n)        (PAR(0x40|(n)))
  20
  21
  22 unsigned long bytes_sent = 0;
  23
  24 void gflush( t_kanal *k )
  25 {
  26         write(1,k->outbuf,k->pos);
  27         bytes_sent+=k->pos;
  28         k->pos=0;
  29 }
  30 void gputc( t_kanal *k, char c )
  31 {
  32         k->outbuf[(k->pos)++]=c;
  33         if( k->pos >=BUFLEN )
  34                 gflush(k);
  35 }
  36 #define gputcesc(k,c)   {gputc((k),ESC);gputc((k),(c));}
  37
  38 void greset( t_kanal *k )
  39 {
  40         gputcesc(k,'0');
  41 }
  42
  43 void gcls( t_kanal *k )
  44 {
  45         gputc(k,13);
  46         gputc(k,10);
  47         gputcesc(k,'E');
  48 }
  49
  50 void gset_scaling( t_kanal *k, int xfactor, int yfactor )
  51 {
  52         gputc(k,0x1d);
  53         gputc(k,ESC);
  54         gputc(k,'s');
  55         gputc(k,PAR(0x40|xfactor));
  56         gputc(k,PAR(0x40|yfactor));
  57 }
  58
  59 void gset_attrib( t_kanal *k, int attrib )
  60 {
  61         if( attrib&GA_OR )
  62                 gputcesc(k,0x12)
  63         else if( attrib&GA_XOR )
  64                 gputcesc(k,0x13)
  65         if( attrib&GA_DEL )
  66                 gputcesc(k,0x11)
  67         if( attrib&GA_PATTERN )
  68                 gputcesc(k,0x14)
  69 }
  70
  71 void gsetpos( t_kanal *k, int x, int y )
  72 {
  73         gputc(k,0x1d);
  74         gputc(k,HIGH_Y((y>>5)));
  75         gputc(k,LOW_Y((y&0x1f)));
  76         gputc(k,HIGH_X((x>>5)));
  77         gputc(k,LOW_X((x&0x1f)));
  78 }
  79
  80 void gline( t_kanal *k ,int x1,int y1, int x2, int y2 )
  81 {
  82         gputc(k,0x1d);
  83         gputc(k,HIGH_Y((y1>>5)));
  84         gputc(k,LOW_Y((y1&0x1f)));
  85         gputc(k,HIGH_X((x1>>5)));
  86         gputc(k,LOW_X((x1&0x1f)));
  87         gputc(k,HIGH_Y((y2>>5)));
  88         gputc(k,LOW_Y((y2&0x1f)));
  89         gputc(k,HIGH_X((x2>>5)));
  90         gputc(k,LOW_X((x2&0x1f)));
  91 }
  92
  93 void gdrawto( t_kanal *k ,int x,int y )
  94 {
  95         gputc(k,0x1d);
  96         gputc(k,7);
  97         gputc(k,HIGH_Y((y>>5)));
  98         gputc(k,LOW_Y((y&0x1f)));
  99         gputc(k,HIGH_X((x>>5)));
 100         gputc(k,LOW_X((x&0x1f)));
 101 }
 102
 103 void gplot( t_kanal *k ,int x,int y )
 104 {
 105         gputc(k,0x1d);
 106         gputc(k,HIGH_Y((y>>5)));
 107         gputc(k,LOW_Y((y&0x1f)));
 108         gputc(k,HIGH_X((x>>5)));
 109         gputc(k,LOW_X((x&0x1f)));
 110         gputc(k,LOW_X((x&0x1f)));
 111 }
 112
 113 void gpline( t_kanal *k , t_pos *pos, int num )
 114 { int i;
 115         gputc(k,0x1d);
 116         for(i=0;i<num;i++)
 117         {       gputc(k,HIGH_Y(((pos[i].y)>>5)));
 118                 gputc(k,LOW_Y(((pos[i].y)&0x1f)));
 119                 gputc(k,HIGH_X(((pos[i].x)>>5)));
 120                 gputc(k,LOW_X(((pos[i].x)&0x1f)));
 121         }
 122 }
 123
 124 unsigned long get_stat(void)
 125 {
 126         unsigned long tmp = bytes_sent;
 127         bytes_sent = 0;
 128         return tmp;
 129 }