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[/] [openrisc/] [trunk/] [bootloaders/] [orpmon/] [common/] [screen.c] - Blame information for rev 242

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Line No. Rev Author Line
1 2 marcus.erl
#include "common.h"
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#include "support.h"
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#include "screen.h"
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#if CRT_ENABLED
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unsigned long fg_color = COLOR_WHITE;
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unsigned long bg_color = COLOR_BLACK;
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int cx = 0;
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int cy = 0;
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extern unsigned char font[256][12];
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static char screen[CHARSY][CHARSX];
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void put_char_xy (int x, int y, char c) {
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  int i, j;
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  screen[y][x] = c;
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  x *= CHAR_WIDTH;
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  y *= CHAR_HEIGHT;
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  for (i = 0; i < CHAR_HEIGHT; i++) {
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    int t = font[(unsigned char)c][i];
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    for (j = 0; j < CHAR_WIDTH; j++) {
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      PUT_PIXEL(x + j, y + i, (t & 1) ? fg_color : bg_color);
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      t >>= 1;
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    }
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  }
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}
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static void scroll (void) {
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  int x,y;
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#if 1
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  for (y = 1; y < CHARSY; y++)
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    for (x = 0; x < CHARSX; x++)
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      put_char_xy (x, y-1, screen[y][x]);
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#else
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  memcpy ( (unsigned char *)FB_BASE_ADDR, ((unsigned char *)FB_BASE_ADDR) + RESX * CHAR_HEIGHT,  (RESY - CHAR_HEIGHT) * RESX);
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  memcpy (&screen[0][0], &screen[1][0], (CHARSY - 1) * CHARSX);
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#endif
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  for (x = 0; x < CHARSX; x++)
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    put_char_xy (x, CHARSY-1, ' ');
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  cy--;
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}
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void screen_putc (char c) {
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  int t;
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  switch (c) {
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  case '\n':
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    cy++;
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    cx = 0;
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    if (cy >= CHARSY)
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      scroll();
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    break;
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  case '\r':
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    cx = 0;
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    break;
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  case '\t':
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    for (t = 0; t < 8 - (cx & 7); t++)
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      screen_putc (' ');
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    break;
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  case '\b':
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    if (cx > 0) cx--;
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    put_char_xy(cx, cy, ' ');
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    break;
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  default:
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    put_char_xy(cx, cy, c);
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    cx++;
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    if(cx >= CHARSX) screen_putc ('\n');
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    break;
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  }
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}
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void screen_clear () {
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  memset ((unsigned char *)FB_BASE_ADDR, bg_color, RESX * RESY);
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  memset (&screen[0][0], ' ', CHARSX * CHARSY);
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  cx = cy = 0;
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}
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void screen_puts (char *s) {
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  while (*s) {
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    screen_putc (*s);
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    s++;
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  }
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}
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void screen_init () {
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  screen_clear ();
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  SET_PALLETE(COLOR_BLACK, 0, 0, 0);
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  SET_PALLETE(COLOR_WHITE, 127, 127, 127);
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  /* Set screen offset */
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  *((unsigned long *)CRT_BUFFER_REG) = FB_BASE_ADDR;
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  /* Turn screen on */
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  *((unsigned long *)CRT_REG) = 0x00000001;
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}
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#endif /* CRT_ENABLED */

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