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#include <ll/i386/hw-data.h>

#include <ll/i386/mem.h>

#include <linux/fb.h>

#include <drivers/grx_fb.h>

static unsigned char font_table[127][8] =

      {

        {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},

        {0x7e, 0x81, 0xa5, 0x81, 0xbd, 0x99, 0x81, 0x7e},

        {0x7e, 0xff, 0xdb, 0xff, 0xc3, 0xe7, 0xff, 0x7e},

        {0x6c, 0xfe, 0xfe, 0xfe, 0x7c, 0x38, 0x10, 0x00},

        {0x10, 0x38, 0x7c, 0xfe, 0x7c, 0x38, 0x10, 0x00},

        {0x38, 0x7c, 0x38, 0xfe, 0xfe, 0x7c, 0x38, 0x7c},

        {0x10, 0x10, 0x38, 0x7c, 0xfe, 0x7c, 0x38, 0x7c},

        {0x00, 0x00, 0x18, 0x3c, 0x3c, 0x18, 0x00, 0x00},

        {0xff, 0xff, 0xe7, 0xc3, 0xc3, 0xe7, 0xff, 0xff},

        {0x00, 0x3c, 0x66, 0x42, 0x42, 0x66, 0x3c, 0x00},

        {0xff, 0xc3, 0x99, 0xbd, 0xbd, 0x99, 0xc3, 0xff},

        {0x0f, 0x07, 0x0f, 0x7d, 0xcc, 0xcc, 0xcc, 0x78},

        {0x3c, 0x66, 0x66, 0x66, 0x3c, 0x18, 0x7e, 0x18},

        {0x3f, 0x33, 0x3f, 0x30, 0x30, 0x70, 0xf0, 0xe0},

        {0x7f, 0x63, 0x7f, 0x63, 0x63, 0x67, 0xe6, 0xc0},

        {0x99, 0x5a, 0x3c, 0xe7, 0xe7, 0x3c, 0x5a, 0x99},

        {0x80, 0xe0, 0xf8, 0xfe, 0xf8, 0xe0, 0x80, 0x00},

        {0x02, 0x0e, 0x3e, 0xfe, 0x3e, 0x0e, 0x02, 0x00},

        {0x18, 0x3c, 0x7e, 0x18, 0x18, 0x7e, 0x3c, 0x18},

        {0x66, 0x66, 0x66, 0x66, 0x66, 0x00, 0x66, 0x00},

        {0x7f, 0xdb, 0xdb, 0x7b, 0x1b, 0x1b, 0x1b, 0x00},

        {0x3e, 0x63, 0x38, 0x6c, 0x6c, 0x38, 0xcc, 0x78},

        {0x00, 0x00, 0x00, 0x00, 0x7e, 0x7e, 0x7e, 0x00},

        {0x18, 0x3c, 0x7e, 0x18, 0x7e, 0x3c, 0x18, 0xff},

        {0x18, 0x3c, 0x7e, 0x18, 0x18, 0x18, 0x18, 0x00},

        {0x18, 0x18, 0x18, 0x18, 0x7e, 0x3c, 0x18, 0x00},

        {0x00, 0x18, 0x0c, 0xfe, 0x0c, 0x18, 0x00, 0x00},

        {0x00, 0x30, 0x60, 0xfe, 0x60, 0x30, 0x00, 0x00},

        {0x00, 0x00, 0xc0, 0xc0, 0xc0, 0xfe, 0x00, 0x00},

        {0x00, 0x24, 0x66, 0xff, 0x66, 0x24, 0x00, 0x00},

        {0x00, 0x18, 0x3c, 0x7e, 0xff, 0xff, 0x00, 0x00},

        {0x00, 0xff, 0xff, 0x7e, 0x3c, 0x18, 0x00, 0x00},

        {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},

        {0x30, 0x78, 0x78, 0x30, 0x30, 0x00, 0x30, 0x00},

        {0x6c, 0x6c, 0x6c, 0x00, 0x00, 0x00, 0x00, 0x00},

        {0x6c, 0x6c, 0xfe, 0x6c, 0xfe, 0x6c, 0x6c, 0x00},

        {0x30, 0x7c, 0xc0, 0x78, 0x0c, 0xf8, 0x30, 0x00},

        {0x00, 0xc6, 0xcc, 0x18, 0x30, 0x66, 0xc6, 0x00},

        {0x38, 0x6c, 0x38, 0x76, 0xdc, 0xcc, 0x76, 0x00},

        {0x60, 0x60, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00},

        {0x18, 0x30, 0x60, 0x60, 0x60, 0x30, 0x18, 0x00},

        {0x60, 0x30, 0x18, 0x18, 0x18, 0x30, 0x60, 0x00},

        {0x00, 0x66, 0x3c, 0xff, 0x3c, 0x66, 0x00, 0x00},

        {0x00, 0x30, 0x30, 0xfc, 0x30, 0x30, 0x00, 0x00},

        {0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x30, 0x60},

        {0x00, 0x00, 0x00, 0xfc, 0x00, 0x00, 0x00, 0x00},

        {0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x30, 0x00},

        {0x06, 0x0c, 0x18, 0x30, 0x60, 0xc0, 0x80, 0x00},

        {0x7c, 0xc6, 0xce, 0xde, 0xf6, 0xe6, 0x7c, 0x00},

        {0x30, 0x70, 0x30, 0x30, 0x30, 0x30, 0xfc, 0x00},

        {0x78, 0xcc, 0x0c, 0x38, 0x60, 0xcc, 0xfc, 0x00},

        {0x78, 0xcc, 0x0c, 0x38, 0x0c, 0xcc, 0x78, 0x00},

        {0x1c, 0x3c, 0x6c, 0xcc, 0xfe, 0x0c, 0x1e, 0x00},

        {0xfc, 0xc0, 0xf8, 0x0c, 0x0c, 0xcc, 0x78, 0x00},

        {0x38, 0x60, 0xc0, 0xf8, 0xcc, 0xcc, 0x78, 0x00},

        {0xfc, 0xcc, 0x0c, 0x18, 0x30, 0x30, 0x30, 0x00},

        {0x78, 0xcc, 0xcc, 0x78, 0xcc, 0xcc, 0x78, 0x00},

        {0x78, 0xcc, 0xcc, 0x7c, 0x0c, 0x18, 0x70, 0x00},

        {0x00, 0x30, 0x30, 0x00, 0x00, 0x30, 0x30, 0x00},

        {0x00, 0x30, 0x30, 0x00, 0x00, 0x30, 0x30, 0x60},

        {0x18, 0x30, 0x60, 0xc0, 0x60, 0x30, 0x18, 0x00},

        {0x00, 0x00, 0xfc, 0x00, 0x00, 0xfc, 0x00, 0x00},

        {0x60, 0x30, 0x18, 0x0c, 0x18, 0x30, 0x60, 0x00},

        {0x78, 0xcc, 0x0c, 0x18, 0x30, 0x00, 0x30, 0x00},

        {0x7c, 0xc6, 0xde, 0xde, 0xde, 0xc0, 0x78, 0x00},

        {0x30, 0x78, 0xcc, 0xcc, 0xfc, 0xcc, 0xcc, 0x00},

        {0xfc, 0x66, 0x66, 0x7c, 0x66, 0x66, 0xfc, 0x00},

        {0x3c, 0x66, 0xc0, 0xc0, 0xc0, 0x66, 0x3c, 0x00},

        {0xf8, 0x6c, 0x66, 0x66, 0x66, 0x6c, 0xf8, 0x00},

        {0xfe, 0x62, 0x68, 0x78, 0x68, 0x62, 0xfe, 0x00},

        {0xfe, 0x62, 0x68, 0x78, 0x68, 0x60, 0xf0, 0x00},

        {0x3c, 0x66, 0xc0, 0xc0, 0xce, 0x66, 0x3e, 0x00},

        {0xcc, 0xcc, 0xcc, 0xfc, 0xcc, 0xcc, 0xcc, 0x00},

        {0x78, 0x30, 0x30, 0x30, 0x30, 0x30, 0x78, 0x00},

        {0x1e, 0x0c, 0x0c, 0x0c, 0xcc, 0xcc, 0x78, 0x00},

        {0xe6, 0x66, 0x6c, 0x78, 0x6c, 0x66, 0xe6, 0x00},

        {0xf0, 0x60, 0x60, 0x60, 0x62, 0x66, 0xfe, 0x00},

        {0xc6, 0xee, 0xfe, 0xfe, 0xd6, 0xc6, 0xc6, 0x00},

        {0xc6, 0xe6, 0xf6, 0xde, 0xce, 0xc6, 0xc6, 0x00},

        {0x38, 0x6c, 0xc6, 0xc6, 0xc6, 0x6c, 0x38, 0x00},

        {0xfc, 0x66, 0x66, 0x7c, 0x60, 0x60, 0xf0, 0x00},

        {0x78, 0xcc, 0xcc, 0xcc, 0xdc, 0x78, 0x1c, 0x00},

        {0xfc, 0x66, 0x66, 0x7c, 0x6c, 0x66, 0xe6, 0x00},

        {0x78, 0xcc, 0xe0, 0x70, 0x1c, 0xcc, 0x78, 0x00},

        {0xfc, 0xb4, 0x30, 0x30, 0x30, 0x30, 0x78, 0x00},

        {0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xfc, 0x00},

        {0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x78, 0x30, 0x00},

        {0xc6, 0xc6, 0xc6, 0xd6, 0xfe, 0xee, 0xc6, 0x00},

        {0xc6, 0xc6, 0x6c, 0x38, 0x38, 0x6c, 0xc6, 0x00},

        {0xcc, 0xcc, 0xcc, 0x78, 0x30, 0x30, 0x78, 0x00},

        {0xfe, 0xc6, 0x8c, 0x18, 0x32, 0x66, 0xfe, 0x00},

        {0x78, 0x60, 0x60, 0x60, 0x60, 0x60, 0x78, 0x00},

        {0xc0, 0x60, 0x30, 0x18, 0x0c, 0x06, 0x02, 0x00},

        {0x78, 0x18, 0x18, 0x18, 0x18, 0x18, 0x78, 0x00},

        {0x10, 0x38, 0x6c, 0xc6, 0x00, 0x00, 0x00, 0x00},

        {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff},

        {0x30, 0x30, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00},

        {0x00, 0x00, 0x78, 0x0c, 0x7c, 0xcc, 0x76, 0x00},

        {0xe0, 0x60, 0x60, 0x7c, 0x66, 0x66, 0xdc, 0x00},

        {0x00, 0x00, 0x78, 0xcc, 0xc0, 0xcc, 0x78, 0x00},

        {0x1c, 0x0c, 0x0c, 0x7c, 0xcc, 0xcc, 0x76, 0x00},

        {0x00, 0x00, 0x78, 0xcc, 0xfc, 0xc0, 0x78, 0x00},

        {0x38, 0x6c, 0x60, 0xf0, 0x60, 0x60, 0xf0, 0x00},

        {0x00, 0x00, 0x76, 0xcc, 0xcc, 0x7c, 0x0c, 0xf8},

        {0xe0, 0x60, 0x6c, 0x76, 0x66, 0x66, 0xe6, 0x00},

        {0x30, 0x00, 0x70, 0x30, 0x30, 0x30, 0x78, 0x00},

        {0x0c, 0x00, 0x0c, 0x0c, 0x0c, 0xcc, 0xcc, 0x78},

        {0xe0, 0x60, 0x66, 0x6c, 0x78, 0x6c, 0xe6, 0x00},

        {0x70, 0x30, 0x30, 0x30, 0x30, 0x30, 0x78, 0x00},

        {0x00, 0x00, 0xcc, 0xfe, 0xfe, 0xd6, 0xc6, 0x00},

        {0x00, 0x00, 0xf8, 0xcc, 0xcc, 0xcc, 0xcc, 0x00},

        {0x00, 0x00, 0x78, 0xcc, 0xcc, 0xcc, 0x78, 0x00},

        {0x00, 0x00, 0xdc, 0x66, 0x66, 0x7c, 0x60, 0xf0},

        {0x00, 0x00, 0x76, 0xcc, 0xcc, 0x7c, 0x0c, 0x1e},

        {0x00, 0x00, 0xdc, 0x76, 0x66, 0x60, 0xf0, 0x00},

        {0x00, 0x00, 0x7c, 0xc0, 0x78, 0x0c, 0xf8, 0x00},

        {0x10, 0x30, 0x7c, 0x30, 0x30, 0x34, 0x18, 0x00},

        {0x00, 0x00, 0xcc, 0xcc, 0xcc, 0xcc, 0x76, 0x00},

        {0x00, 0x00, 0xcc, 0xcc, 0xcc, 0x78, 0x30, 0x00},

        {0x00, 0x00, 0xc6, 0xd6, 0xfe, 0xfe, 0x6c, 0x00},

        {0x00, 0x00, 0xc6, 0x6c, 0x38, 0x6c, 0xc6, 0x00},

        {0x00, 0x00, 0xcc, 0xcc, 0xcc, 0x7c, 0x0c, 0xf8},

        {0x00, 0x00, 0xfc, 0x98, 0x30, 0x64, 0xfc, 0x00},

        {0x1c, 0x30, 0x30, 0xe0, 0x30, 0x30, 0x1c, 0x00},

        {0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00},

        {0xe0, 0x30, 0x30, 0x1c, 0x30, 0x30, 0xe0, 0x00},

        {0x76, 0xdc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},

      };

#define memsetw(addr, val, n) {LIN_ADDR i; for(i = addr; i < addr + n; i += 2) *(WORD *)i = val;}

struct fb_info *grx_info = NULL;

void grx_fb_init(struct fb_info *info)

{

  if (!info) return;

  grx_info = info;

}

void grx_putimage(WORD x1, WORD y1, WORD x2, WORD y2, BYTE *buf)

{

  struct fb_image image;

  if (!grx_info || grx_info->var.bits_per_pixel != 16) return;

  image.depth = grx_info->var.bits_per_pixel;

  image.data = buf;

  image.width = x2-x1+1;

  image.height = y2-y1+1;

  image.dy = y1;

  image.dx = x1;

  grx_info->fbops->fb_imageblit(grx_info, &image);

}

void grx_getimage(WORD x1, WORD y1, WORD x2, WORD y2, BYTE *buf)

{

    WORD bpr;

    LIN_ADDR addr, p;

    WORD dx, y;

    if (!grx_info || grx_info->var.bits_per_pixel != 16) return;

    bpr = grx_info->var.xres * 2;

    p = buf;

    addr = (LIN_ADDR)(grx_info->screen_base + x1 * 2 + bpr * y1);

    dx = (x2 - x1 + 1) * 2;

    for (y = y1; y <= y2; y++) {

        memcpy(p, addr, dx);

        p += dx;

        addr += bpr;

    }

}

void grx_box(WORD x1, WORD y1, WORD x2, WORD y2, DWORD color)

{

  struct fb_fillrect rect;

  if (!grx_info || grx_info->var.bits_per_pixel != 16) return;

  rect.dx = x1;

  rect.dy = y1;

  rect.width = x2-x1+1;

  rect.height = x2-x1+1;

  rect.color = color;

  rect.rop = ROP_COPY;

  grx_info->fbops->fb_fillrect(grx_info, &rect);

}

void grx_rect(WORD x1, WORD y1, WORD x2, WORD y2, DWORD color)

{

    WORD bpr;

    DWORD addr;

    WORD dx, y;

    if (!grx_info || grx_info->var.bits_per_pixel != 16) return;

    bpr = grx_info->var.xres * 2;

    addr = (DWORD)(grx_info->screen_base + x1 * 2 + bpr * y1);

    dx = (x2 - x1) * 2;

    memsetw((LIN_ADDR)addr, color, dx+2);

    addr += bpr;

    for (y = y1 + 1; y <= y2 - 1; y++) {

        *(WORD *)addr = color;

        *(WORD *)(addr + dx) = color;

        addr += bpr;

    }

    memsetw((LIN_ADDR)addr, color, dx+2);

}

void grx_text(char *text, WORD x, WORD y, DWORD fg, DWORD bg)

{

    DWORD fp, addr;

    WORD bpr;

    int r, c, bits;

    if (!grx_info || grx_info->var.bits_per_pixel != 16) return;

    bpr = grx_info->var.xres * 2;

    addr = (DWORD)(grx_info->screen_base);

    while (*text) {

        fp = (DWORD)&(font_table[*(BYTE *)text][0]);

        for (r=0; r<8; r++) {

            bits = *(BYTE *)(fp++);

            for (c=0; c<8; c++)

                if (bits & (0x80>>c))

                    *(WORD *)(addr + (y + r) * bpr + ((x + c) * 2)) =  fg;

                else

                    *(WORD *)(addr + (y + r) * bpr + ((x + c) * 2)) = bg;

        }

        text++;

        x += 8;

    }

}

void linLine16(WORD x1, WORD y1, WORD x2, WORD y2, DWORD color)

{

    register int t, distance;

    register DWORD addr;

    register WORD bpr;

    int xerr=0, yerr=0, deltax, deltay;

    int incx, incy;

    bpr = grx_info->var.xres * 2;

    addr = (DWORD)(grx_info->screen_base);

    deltax = x2 - x1;                   /* compute both distances */

    deltay = y2 - y1;

    if (deltax > 0)                     /* compute increments */

        incx = 1;

    else if (deltax == 0)

        incx = 0;

    else

        incx = -1;

    if (deltay > 0)

        incy = 1;

    else if (deltay == 0)

        incy = 0;

    else

        incy = -1;

    deltax = abs(deltax);               /* determine greater distance */

    deltay = abs(deltay);

    if (deltax > deltay)

        distance = deltax;

    else

        distance = deltay;

    for (t=0; t<=distance+1; t++) {     /* draw the line */

        *(WORD *)(addr + y1 * bpr + (x1 * 2)) = color;

        xerr += deltax;

        yerr += deltay;

        if (xerr > distance) {

            xerr -= distance;

            x1 += incx;

        }

        if (yerr > distance) {

            yerr -= distance;

            y1 += incy;

        }

    }

}

void grx_plot(WORD x, WORD y, DWORD color)

{

    WORD bpr;

    if (!grx_info || grx_info->var.bits_per_pixel != 16) return;

    bpr = grx_info->var.xres * 2;

    *(WORD *)(grx_info->screen_base + y * bpr + (x * 2)) = color;

}

DWORD grx_getpixel(WORD x, WORD y)

{

    WORD bpr;

    DWORD rv;

    if (!grx_info || grx_info->var.bits_per_pixel != 16) return -1;

    bpr = grx_info->var.xres * 2;

    rv = *(WORD *)(grx_info->screen_base + y * bpr + (x * 2));

    return rv;

}

static void circlepixels(WORD x, WORD y, WORD sx, WORD sy, DWORD c)

{

    grx_plot(sx + x, sy + y, c);

    grx_plot(sx - x, sy + y, c);

    grx_plot(sx + x, sy - y, c);

    grx_plot(sx - x, sy - y, c);

    grx_plot(sx + y, sy + x, c);

    grx_plot(sx - y, sy + x, c);

    grx_plot(sx + y, sy - x, c);

    grx_plot(sx - y, sy - x, c);

}

void grx_circle(WORD sx, WORD sy, WORD r, DWORD c)

{

    int x, y, d;

    if (!grx_info || grx_info->var.bits_per_pixel != 16) return;

    if (r < 1) {

        grx_plot(sx, sy, c);

        return;

    }

    x = 0;

    y = r;

    d = 1 - r;

    circlepixels(x, y, sx, sy, c);

    while (x < y) {

        if (d < 0)

            d += x * 2 + 3;

        else {

            d += x * 2 - y * 2 + 5;

            y--;

        }

        x++;

        circlepixels(x, y, sx, sy, c);

    }

}

static __inline__ void discpixels(WORD x, WORD y, WORD sx, WORD sy, DWORD c)

{

    grx_line(sx + x, sy + y, sx + x, sy - y, c);

    grx_line(sx - x, sy + y, sx - x, sy - y, c);

    grx_line(sx + y, sy + x, sx + y, sy - x , c);

    grx_line(sx - y, sy + x, sx - y, sy - x , c);

}

void grx_disc(WORD sx, WORD sy, WORD r, DWORD c)

{

    int x, y, d;

    if (!grx_info || grx_info->var.bits_per_pixel != 16) return;

    if (r < 1) {

        grx_plot(sx, sy, c);

        return;

    }

    x = 0;

    y = r;

    d = 1 - r;

    discpixels(x, y, sx, sy, c);

    while (x < y) {

        if (d < 0)

            d += x * 2 + 3;

        else {

            d += x * 2 - y * 2 + 5;

            y--;

        }

        x++;   

        discpixels(x, y, sx, sy, c);

    }

}