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/*

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */

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

#include <ll/i386/mem.h>

#include <ll/i386/string.h>

#include <ll/i386/error.h>

#include <ll/sys/ll/ll-func.h>

#include <drivers/gd.h>

#include <drivers/glib.h>

#include "drawfun/fun8.h"

#include "drawfun/fun16.h"

/*#define FORCEBANK             // 4 dbg purpose*/

int videocard;

DWORD flbaddr = 0;

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

DWORD (*grx_getpixel)(WORD x, WORD y);

void (*grx_getimage)(WORD x1, WORD y1, WORD x2, WORD y2, WORD *buf);  // Tool

void (*grx_putimage)(WORD x1, WORD y1, WORD x2, WORD y2, WORD *buf);  // Tool

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

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

void (*grx_line)(WORD x1, WORD y1, WORD x2, WORD y2, DWORD color);

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

void (*grx_circle)(WORD x, WORD y, WORD r, DWORD col);

void (*grx_disc)(WORD x, WORD y, WORD r, DWORD col);

void dummyfun(void)

{

    error("Not yet implemented...\n");

    ll_abort(500);

}

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 circle(WORD sx, WORD sy, WORD r, DWORD c)

{

    int x, y, d;

        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);

    }

}

/* grx_disc by Massy */

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 disc(WORD sx, WORD sy, WORD r, DWORD c)

{

    int x, y, d;

        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);

    }

}

int grx_init(void)

{

#ifdef FORCEBANK

    videocard = gd_init(NOLINEAR);

#else 

    videocard = gd_init(0);

#endif

    if (videocard < 0) {

        cprintf("Graphic Driver Info error...\n");

        return -1;

    }

    return 1;

}

int grx_close(void)

{

    gd_setmode(0);

    return 1;

}

int grx_setmode(WORD mode)

{

    int lin;

    grx_vga_modeinfo m;

    if ((lin = gd_setmode(mode)) < 0){

        return -1;

    }

    gd_getmodeinfo(&m);

    switch (m.bytesperpixel) {

        case 1 : if (lin == TRUE){

                flbaddr = gd_getflb();

                grx_plot = linWr8;

                grx_getpixel = linRd8;

                grx_rect = linRect8;

                grx_box = linBox8;

                grx_text = linText8;

                grx_line = linLine8;

                grx_putimage = linPut8;

                grx_getimage = linGet8;

            } else {

                grx_plot = WrPixel_256;

                grx_getpixel = RdPixel_256;

                grx_rect = WrRect_256;

                grx_box = ClrWin_256;

                grx_text = WrText_256;

                grx_line = WrLine_256;

                grx_putimage = WrWin_256;

                grx_getimage = RdWin_256;

            }

            break;

        case 2 : if (lin == TRUE){

                flbaddr = gd_getflb();

                grx_plot = linWr16;

                grx_getpixel = linRd16;

                grx_rect = linRect16;

                grx_box = linBox16;

                grx_text = linText16;

                grx_line = linLine16;

                grx_putimage = linPut16;

                grx_getimage = linGet16;

            } else {

                grx_plot = WrPixel_Hi;

                grx_getpixel= RdPixel_Hi;

                grx_rect = WrRect_Hi;

                grx_box = ClrWin_Hi;

                grx_text = WrText_Hi;

                grx_line = WrLine_Hi;

                grx_putimage = WrWin_Hi;

                grx_getimage = RdWin_Hi;

            }

            break;

        default :

            grx_plot = (void (*)(WORD, WORD, DWORD))dummyfun;

            grx_getpixel = (DWORD (*)(WORD, WORD))dummyfun;

            grx_rect = (void (*)(WORD, WORD, WORD, WORD, DWORD))dummyfun;

            grx_box = (void (*)(WORD, WORD, WORD, WORD, DWORD))dummyfun;

            grx_text = (void (*)(char *, WORD, WORD, DWORD, DWORD))dummyfun;

            grx_line = (void (*)(WORD, WORD, WORD, WORD, DWORD))dummyfun;

            grx_putimage = (void (*)(WORD, WORD, WORD, WORD, WORD *))dummyfun;  // Tool

            grx_getimage = (void (*)(WORD, WORD, WORD, WORD, WORD *))dummyfun;  // Tool

            break;

    }

        grx_circle = circle;

        grx_disc = disc;

    return 1;

}

void grx_modeinfo(void)

{

    gd_showmodeinfo();

}

int grx_getmode(WORD x, WORD y, BYTE depth)

{

    return gd_modenum(x, y, depth);

}

void grx_cardinfo(void)

{

    gd_showinfo();

}

void grx_getcolor(BYTE ind, BYTE *r, BYTE *g, BYTE *b)

{

    gd_getcolor(ind, r, g, b);

}

void grx_setcolor(BYTE ind,BYTE r,BYTE g,BYTE b)

{

    gd_setcolor(ind, r, g, b);

}

void grx_getpalette(BYTE start, BYTE num, BYTE *pal)

{

    gd_getpalette(start, num, pal);

}

void grx_setpalette(BYTE start, BYTE num, BYTE *pal)

{

    gd_setpalette(start, num, pal);

}

int grx_open(WORD x, WORD y, BYTE depth)

{

    int mode;

    mode = grx_getmode(x, y, depth);

    if (grx_setmode(mode) < 0) {

        return -1;

    }

    return 1;

}

void grx_clear(DWORD color)

{

    grx_vga_modeinfo m;

    gd_getmodeinfo(&m);

    grx_box(0, 0, m.width, m.height, color);

}