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[/] [or1k/] [branches/] [oc/] [orpmon/] [common/] [screen.c] - Rev 1775
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#include "common.h" #include "screen.h" #if CRT_ENABLED unsigned long fg_color = COLOR_WHITE; unsigned long bg_color = COLOR_BLACK; int cx = 0; int cy = 0; extern unsigned char font[256][12]; static char screen[CHARSY][CHARSX]; void put_char_xy (int x, int y, char c) { int i, j; screen[y][x] = c; x *= CHAR_WIDTH; y *= CHAR_HEIGHT; for (i = 0; i < CHAR_HEIGHT; i++) { int t = font[(unsigned char)c][i]; for (j = 0; j < CHAR_WIDTH; j++) { if (t & 1) PUT_PIXEL(x + j, y + i, fg_color); else PUT_PIXEL(x + j, y + i, bg_color); t >>= 1; } } } static void scroll (void) { int x,y; for (y = 1; y < CHARSY; y++) for (x = 0; x < CHARSX; x++) put_char_xy (x, y-1, screen[y][x]); for (x = 0; x < CHARSX; x++) put_char_xy (x, CHARSY-1, ' '); cy--; } void screen_putc (char c) { int t; switch (c) { case '\n': cy++; cx = 0; if (cy >= CHARSY) scroll(); break; case '\r': cx = 0; break; case '\t': for (t = 0; t < 8 - (cx & 7); t++) screen_putc (' '); break; default: cx++; if(cx >= CHARSX) screen_putc ('\n'); put_char_xy(cx, cy, c); break; } } void screen_clear () { int x, y; for (y = 0; y < CHARSY; y++) for (x = 0; x < CHARSX; x++) put_char_xy (x, y, ' '); cx = cy = 0; } void screen_puts (char *s) { while (*s) { screen_putc (*s); s++; } } void screen_init () { SET_PALLETE(COLOR_BLACK, 0, 0, 0); SET_PALLETE(COLOR_WHITE, 255, 255, 255); /* Set screen offset */ *((unsigned long *)CRT_BUFFER_REG) = FB_BASE_ADD; /* Turn screen on */ *((unsigned long *)CRT_REG) = 0x00000001; } #endif /* CRT_ENABLED */
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