/*
   ds81 - Nintendo DS ZX81 emulator.

   Copyright (C) 2006  Ian Cowburn
   
   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.
  
   $Id$
*/

#include <stdlib.h>
#include <stdio.h>
#include <nds.h>

#include "framebuffer.h"
#include "gui.h"

#include "splashimg_bin.h"
#include "zx81_bin.h"

/* ---------------------------------------- STATIC DATA
*/


/* ---------------------------------------- DISPLAY FUNCS
*/
static void VBlankFunc(void)
{
    scanKeys();
}

static void Splash(void)
{
    static const char *text[]=
    {
    	"DS81 \177 2006 Ian C",
	" ",
	"ZX81 ROM",
	"\177 1981",
	"Nine Tiles Networks LTD",
	" ",
	"3D MONSTER MAZE",
	"\177 1983",
	"Malcom E. Evans",
	" ",
	"PRESS A TO CONTINUE",
	" ",
	" ",
	"http://www.noddybox.co.uk/",
	NULL
    };

    sImage img;
    int f;

    FB_Clear();

    loadPCX(splashimg_bin,&img);
    image8to16(&img);
    dmaCopy(img.data8,BG_GFX_SUB,SCREEN_WIDTH*SCREEN_HEIGHT*2);

    for(f=0;text[f];f++)
    {
	FB_Centre(text[f],40+f*8,FB_RGB(31,31,31),-1);
    }

    while(!(keysDown() & KEY_A))
    {
	swiWaitForVBlank();
    }
}


/* ---------------------------------------- MAIN
*/
int main(int argc, char *argv[])
{
    int ch;
    uint8 *ch_data;

    powerON(POWER_ALL_2D);

    /* Set up main text screen and grab the ROM character data
    */
    videoSetMode(MODE_0_2D | DISPLAY_BG0_ACTIVE);

    vramSetBankA(VRAM_A_MAIN_BG_0x6000000);
    vramSetBankB(VRAM_B_MAIN_BG_0x6020000);

    BG0_CR = BG_COLOR_256|BG_MAP_BASE(31)|BG_TILE_BASE(0);
    BG0_X0 = 0;
    BG0_Y0 = 0;

    BG_PALETTE[0] = RGB15(31,31,31);
    BG_PALETTE[1] = RGB15(0,0,0);
    ch_data = (uint8*)BG_TILE_RAM(0);

    for(ch=0;ch<64;ch++)
    {
	int r;

	for(r=0;r<8;r++)
	{
	    int b;
	    int rd;

	    rd=zx81_bin[0x1e00+ch*8+r];

	    for(b=7;b>=0;b--)
	    {
		if (rd&(1<<b))
		{
		    *ch_data = 1;
		    *(ch_data+4096) = 0;
		}
		else
		{
		    *ch_data = 0;
		    *(ch_data+4096) = 1;
		}

		ch_data++;
	    }
	}
    }

    {
    uint16 *tiles;
    tiles = (uint16*)BG_MAP_RAM(31);
    for(ch=0;ch<128;ch++)
    {
    	*(tiles+(ch%32)+(ch/32)*32)=ch;
    }
    }

    /* Set up the sub-screen for rotation (basically for use as a framebuffer)
    */
    videoSetModeSub(MODE_5_2D | DISPLAY_BG2_ACTIVE);
    vramSetBankC(VRAM_C_SUB_BG_0x6200000);

    SUB_BG2_CR = BG_BMP16_256x256;
    SUB_BG2_XDX = 0x100;
    SUB_BG2_XDY = 0;
    SUB_BG2_YDX = 0;
    SUB_BG2_YDY = 0x100;
    SUB_BG2_CX = 0;
    SUB_BG2_CY = 0;

    irqInit();
    irqSet(IRQ_VBLANK,VBlankFunc);

    keysSetRepeat(30,15);

    FB_Init(BG_GFX_SUB);

    Splash();

    while(1)
    {
	static const char *menu[]={"Option #1","A longer option","Short","Wibble Sticks!",NULL};
	char buff[32];

	sprintf(buff,"sel=%d",GUI_Menu(menu));
	FB_Centre(buff,SCREEN_HEIGHT-10,FB_RGB(31,31,31),FB_RGB(0,0,15));
    }

    return 0;
}