Subversion Repositories openrisc_2011-10-31

#include "common.h"

#include "support.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++) {

                        PUT_PIXEL(x + j, y + i, (t & 1) ? fg_color : bg_color);

                        t >>= 1;

                }

        }

}

static void scroll(void)

{

        int x, y;

#if 1

        for (y = 1; y < CHARSY; y++)

                for (x = 0; x < CHARSX; x++)

                        put_char_xy(x, y - 1, screen[y][x]);

#else

        memcpy((unsigned char *)FB_BASE_ADDR,

               ((unsigned char *)FB_BASE_ADDR) + RESX * CHAR_HEIGHT,

               (RESY - CHAR_HEIGHT) * RESX);

        memcpy(&screen[0][0], &screen[1][0], (CHARSY - 1) * CHARSX);

#endif

        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;

        case '\b':

                if (cx > 0)

                        cx--;

                put_char_xy(cx, cy, ' ');

                break;

        default:

                put_char_xy(cx, cy, c);

                cx++;

                if (cx >= CHARSX)

                        screen_putc('\n');

                break;

        }

}

void screen_clear()

{

        memset((unsigned char *)FB_BASE_ADDR, bg_color, RESX * RESY);

        memset(&screen[0][0], ' ', CHARSX * CHARSY);

        cx = cy = 0;

}

void screen_puts(char *s)

{

        while (*s) {

                screen_putc(*s);

                s++;

        }

}

void screen_init()

{

        screen_clear();

        SET_PALLETE(COLOR_BLACK, 0, 0, 0);

        SET_PALLETE(COLOR_WHITE, 127, 127, 127);

        /* Set screen offset */

        *((unsigned long *)CRT_BUFFER_REG) = FB_BASE_ADDR;

        /* Turn screen on */

        *((unsigned long *)CRT_REG) = 0x00000001;

}

#endif /* CRT_ENABLED */