title.c

   1 #include "console.h"
   2 #include "snow.h"
   3 #include "io.h"
   4
   5 void init_title()
   6 {
   7     unsigned char old_attr;
   8
   9     snow_set_snowfree(20, 2, 40, 1, 1);
  10
  11     old_attr = console_set_attr(0x8);
  12     console_set_cursor(20, 2);
  13     kprintf(".-==[  QEMU Advent  Calendar 2014  ]==-.");
  14     console_set_attr(old_attr);
  15 }
  16
  17 void title_timer(void)
  18 {
  19     static int state;
  20     static unsigned char red, green = 63, blue;
  21     unsigned char* cur;
  22
  23     switch (state % 3) {
  24         case 0: cur = &red;     break;
  25         case 1: cur = &green;   break;
  26         case 2: cur = &blue;    break;
  27     }
  28
  29     if (state & 1) {
  30         (*cur)--;
  31     } else {
  32         (*cur)++;
  33     }
  34
  35     if (*cur == 0 || *cur == 63) {
  36         state++;
  37         state %= 6;
  38     }
  39
  40     outb(0x3c8, 56);
  41     outb(0x3c9, red);
  42     outb(0x3c9, green);
  43     outb(0x3c9, blue);
  44 }