#include <vdi.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>	/* mem... */

#include <image.h>

#include "cltr.h"

extern int planes,columns_vdi;

#define WIDTH		6
#define HEIGHT		16
#define FIRSTLINE	4
#define XHEIGHT		(HEIGHT+FIRSTLINE+1)
#define XWIDTH		(WIDTH+2)
static int BLOCK_SW	= 24;
static int BLOCK_W		= 20;
static int BLOCK_H		= 20;
static int BLOCK_XW;
static int BLOCK_XH;

int feld[HEIGHT+5][WIDTH+2];

void get_columns_size(int *w,int *h)
{
	*w=WIDTH*BLOCK_W;
	*h=HEIGHT*BLOCK_H;
}
void get_columns_prev(int *w,int *h)
{
	*w=BLOCK_W*2;
	*h=BLOCK_H*4;
}

char col_quick1[]={
0x00,0x00,0x00,0x07,0xff,0xfe,0x07,0xff,0xfe,0x07,0xff,0xfe,
0x07,0xff,0xfe,0x07,0xff,0xfe,0x07,0xff,0xfe,0x00,0x00,0x00,
0x07,0xff,0xfe,0x07,0xff,0xfe,0x07,0xff,0xfe,0x07,0xff,0xfe,0x07,0xff,0xfe,0x00,

0x00,0x00,0x00,0x08,0x00,0x01,0x08,0x00,0x01,0x08,0x00,0x01,
0x08,0x00,0x01,0x08,0x00,0x01,0x08,0x00,0x01,0x00,0x00,0x00,
0x08,0x00,0x01,0x08,0x00,0x01,0x08,0x00,0x01,0x08,0x00,0x01,0x08,0x00,0x01,0x00,

0x00,0x00,0x00,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,
0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0b,0x11,0x15,0x0b,0x55,0x55,
0x0b,0x55,0x55,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xdf,0xdd,0x0b,0xdf,0xdd,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0a,0x00,0x05,0x0a,0xaa,0xad,
0x0a,0x88,0x8d,0x0a,0xaa,0xad,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xdf,0xdd,0x0b,0x8f,0x8d,0x0b,0x8f,0x8d,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0a,0x44,0x45,0x0b,0x55,0x55,
0x0b,0x55,0x55,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xdf,0xdd,0x0b,0x8f,0x8d,0x0b,0x07,0x05,0x0b,0x07,0x05,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0a,0x00,0x05,0x0a,0xaa,0xad,
0x0a,0x22,0x25,0x0a,0xaa,0xad,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xdf,0xdd,0x0b,0x8f,0x8d,0x0b,0x07,0x05,0x0a,0x02,0x01,0x0a,0x02,0x01,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0b,0x11,0x15,0x0b,0x55,0x55,
0x0b,0x55,0x55,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xdf,0xdd,0x0b,0x8f,0x8d,0x0b,0x07,0x05,0x0b,0x07,0x05,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0a,0x00,0x05,0x0a,0xaa,0xad,
0x0a,0x88,0x8d,0x0a,0xaa,0xad,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xdf,0xdd,0x0b,0x8f,0x8d,0x0b,0x8f,0x8d,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0a,0x44,0x45,0x0b,0x55,0x55,
0x0b,0x55,0x55,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xdf,0xdd,0x0b,0xdf,0xdd,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0a,0x00,0x05,0x0a,0xaa,0xad,
0x0a,0x22,0x25,0x0a,0xaa,0xad,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0b,0x11,0x15,0x0b,0x55,0x55,
0x0b,0x55,0x55,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xdf,0xdd,0x0b,0xdf,0xdd,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0a,0x00,0x05,0x0a,0xaa,0xad,
0x0a,0x88,0x8d,0x0a,0xaa,0xad,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xdf,0xdd,0x0b,0x8f,0x8d,0x0b,0x8f,0x8d,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0a,0x44,0x45,0x0b,0x55,0x55,
0x0b,0x55,0x55,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xdf,0xdd,0x0b,0x8f,0x8d,0x0b,0x07,0x05,0x0b,0x07,0x05,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0a,0x00,0x05,0x0a,0xaa,0xad,
0x0a,0x22,0x25,0x0a,0xaa,0xad,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xdf,0xdd,0x0b,0x8f,0x8d,0x0b,0x07,0x05,0x0a,0x02,0x01,0x0a,0x02,0x01,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0b,0x11,0x15,0x0b,0x55,0x55,
0x0b,0x55,0x55,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xdf,0xdd,0x0b,0x8f,0x8d,0x0b,0x07,0x05,0x0b,0x07,0x05,0x00,

0x00,0x00,0x00,0x0a,0x00,0x05,0x0a,0x00,0x05,0x0a,0xaa,0xad,
0x0a,0x88,0x8d,0x0a,0xaa,0xad,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xdf,0xdd,0x0b,0x8f,0x8d,0x0b,0x8f,0x8d,0x00,

0x00,0x00,0x00,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,
0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x00,0x00,0x00,
0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xff,0xfd,0x0b,0xdf,0xdd,0x0b,0xdf,0xdd,0x00,

0x00,0x00,0x00,0x08,0x00,0x01,0x08,0x00,0x01,0x08,0x00,0x01,
0x08,0x00,0x01,0x08,0x00,0x01,0x08,0x00,0x01,0x00,0x00,0x00,
0x08,0x00,0x01,0x08,0x00,0x01,0x08,0x00,0x01,0x08,0x00,0x01,0x08,0x00,0x01,0x00,

0x00,0x00,0x00,0x07,0xff,0xfe,0x07,0xff,0xfe,0x07,0xff,0xfe,
0x07,0xff,0xfe,0x07,0xff,0xfe,0x07,0xff,0xfe,0x00,0x00,0x00,
0x07,0xff,0xfe,0x07,0xff,0xfe,0x07,0xff,0xfe,0x07,0xff,0xfe,0x07,0xff,0xfe,0x00,
};

char col_quick2[]={
0x00,0x00,0x00,0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x7f,0xff,0xe0,
0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x00,0x00,0x00,
0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x00,

0x00,0x00,0x00,0x80,0x00,0x10,0x80,0x00,0x10,0x80,0x00,0x10,
0x80,0x00,0x10,0x80,0x00,0x10,0x80,0x00,0x10,0x00,0x00,0x00,
0x80,0x00,0x10,0x80,0x00,0x10,0x80,0x00,0x10,0x80,0x00,0x10,0x80,0x00,0x10,0x00,

0x00,0x00,0x00,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,
0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xb1,0x11,0x50,0xb5,0x55,0x50,
0xb5,0x55,0x50,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbd,0xfd,0xd0,0xbd,0xfd,0xd0,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xa0,0x00,0x50,0xaa,0xaa,0xd0,
0xa8,0x88,0xd0,0xaa,0xaa,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbd,0xfd,0xd0,0xb8,0xf8,0xd0,0xb8,0xf8,0xd0,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xa4,0x44,0x50,0xb5,0x55,0x50,
0xb5,0x55,0x50,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbd,0xfd,0xd0,0xb8,0xf8,0xd0,0xb0,0x70,0x50,0xb0,0x70,0x50,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xa0,0x00,0x50,0xaa,0xaa,0xd0,
0xa2,0x22,0x50,0xaa,0xaa,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbd,0xfd,0xd0,0xb8,0xf8,0xd0,0xb0,0x70,0x50,0xa0,0x20,0x10,0xa0,0x20,0x10,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xb1,0x11,0x50,0xb5,0x55,0x50,
0xb5,0x55,0x50,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbd,0xfd,0xd0,0xb8,0xf8,0xd0,0xb0,0x70,0x50,0xb0,0x70,0x50,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xa0,0x00,0x50,0xaa,0xaa,0xd0,
0xa8,0x88,0xd0,0xaa,0xaa,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbd,0xfd,0xd0,0xb8,0xf8,0xd0,0xb8,0xf8,0xd0,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xa4,0x44,0x50,0xb5,0x55,0x50,
0xb5,0x55,0x50,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbd,0xfd,0xd0,0xbd,0xfd,0xd0,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xa0,0x00,0x50,0xaa,0xaa,0xd0,
0xa2,0x22,0x50,0xaa,0xaa,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xb1,0x11,0x50,0xb5,0x55,0x50,
0xb5,0x55,0x50,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbd,0xfd,0xd0,0xbd,0xfd,0xd0,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xa0,0x00,0x50,0xaa,0xaa,0xd0,
0xa8,0x88,0xd0,0xaa,0xaa,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbd,0xfd,0xd0,0xb8,0xf8,0xd0,0xb8,0xf8,0xd0,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xa4,0x44,0x50,0xb5,0x55,0x50,
0xb5,0x55,0x50,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbd,0xfd,0xd0,0xb8,0xf8,0xd0,0xb0,0x70,0x50,0xb0,0x70,0x50,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xa0,0x00,0x50,0xaa,0xaa,0xd0,
0xa2,0x22,0x50,0xaa,0xaa,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbd,0xfd,0xd0,0xb8,0xf8,0xd0,0xb0,0x70,0x50,0xa0,0x20,0x10,0xa0,0x20,0x10,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xb1,0x11,0x50,0xb5,0x55,0x50,
0xb5,0x55,0x50,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbd,0xfd,0xd0,0xb8,0xf8,0xd0,0xb0,0x70,0x50,0xb0,0x70,0x50,0x00,

0x00,0x00,0x00,0xa0,0x00,0x50,0xa0,0x00,0x50,0xaa,0xaa,0xd0,
0xa8,0x88,0xd0,0xaa,0xaa,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbd,0xfd,0xd0,0xb8,0xf8,0xd0,0xb8,0xf8,0xd0,0x00,

0x00,0x00,0x00,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,
0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0x00,0x00,0x00,
0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbf,0xff,0xd0,0xbd,0xfd,0xd0,0xbd,0xfd,0xd0,0x00,

0x00,0x00,0x00,0x80,0x00,0x10,0x80,0x00,0x10,0x80,0x00,0x10,
0x80,0x00,0x10,0x80,0x00,0x10,0x80,0x00,0x10,0x00,0x00,0x00,
0x80,0x00,0x10,0x80,0x00,0x10,0x80,0x00,0x10,0x80,0x00,0x10,0x80,0x00,0x10,0x00,

0x00,0x00,0x00,0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x7f,0xff,0xe0,
0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x00,0x00,0x00,
0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x7f,0xff,0xe0,0x00,
};

MFDB cbloecke={col_quick2,20*16,20,20,0,1,0,0,0};

typedef struct {
	int x;
	int y;
	int c[3];
} STONE;

static STONE stone,next;

extern long screen_addr,buffer_addr;
extern MFDB buffer;
extern int screen_width;
extern dr_columns1(char *dest,char *source);
extern dr_columns2(char *dest,char *source);

static int x_pos[XWIDTH];
static int y_pos[XHEIGHT];

static void (*dr_block)(int x,int y,int col);

static void qdr_block(int x,int y,int col)
{
int xx,yy;
char *source,*dest;

	xx=x_pos[x];
	yy=y_pos[y];
	dest=(char*)buffer_addr+(long)yy*buffer_width+xx/8;
	if ( xx&7 ) {
		source=col_quick1+col*3;
		dr_columns1(dest,source);
	}
	else {
		source=col_quick2+col*3;
		dr_columns2(dest,source);
	}
	if ( yy<copy_min )
		copy_min=yy;
	if ( yy+BLOCK_XH>copy_max )
		copy_max=yy+BLOCK_XH;
}
static void vdidr_block(int x,int y,int col)
{	
int xy[8],yy;

	xy[0]=col*BLOCK_SW;	/* bl”cke auf bytegrenze verbreitert */
	xy[1]=0;
	xy[2]=xy[0]+BLOCK_XW;
	xy[3]=BLOCK_XH;
	xy[4]=x_pos[x];
	yy=xy[5]=y_pos[y];
	xy[6]=xy[4]+BLOCK_XW;
	xy[7]=xy[5]+BLOCK_XH;
	vro_cpyfm(handle,S_ONLY,xy,&cbloecke,&buffer);
	if ( yy<copy_min )
		copy_min=yy;
	if ( yy+BLOCK_XH>copy_max )
		copy_max=yy+BLOCK_XH;
}

static void dr_vdi(int x,int y,int col,int x_off,int y_off)
{	
int xy[8];

	xy[0]=col*BLOCK_SW;	/* bl”cke auf bytegrenze verbreitert */
	xy[1]=0;
	xy[2]=xy[0]+BLOCK_XW;
	xy[3]=BLOCK_XH;
	xy[4]=x_pos[x]+x_off;
	xy[5]=y_pos[y]+y_off;
	xy[6]=xy[4]+BLOCK_XW;
	xy[7]=xy[5]+BLOCK_XH;
	vro_cpyfm(handle,S_ONLY,xy,&cbloecke,&screen);
}

static void rm_stone(void)
{
int i,y;

	for ( i=0; i<3; i++ ) {
		y=stone.y+i;
		if ( y>=FIRSTLINE ) {
			dr_block(stone.x,y,0);
		}
	}
}

static void dr_stone(void)
{
int i,y;
	for ( i=0; i<3; i++ ) {
		y=stone.y+i;
		if ( y>=FIRSTLINE ) {
			dr_block(stone.x,y,stone.c[i]);
		}
	}
}

/*------------------------------------------------------------------------------

	preview

------------------------------------------------------------------------------*/
static void do_draw(void *data,int x,int y,int w,int h)
{
int i;

	for ( i=0; i<3; i++ )
		dr_vdi(1,FIRSTLINE+i,next.c[i],prev_x+(prev_w-BLOCK_W)/2,prev_y+(prev_h-BLOCK_H*3)/2);
}

static void dr_preview(void)
{
	draw_preview(do_draw,0l);
}

void dr_cstat(int x,int y,int dy)
{
int i;

	for ( i=1; i<7; i++,y+=dy )
		dr_vdi(2,FIRSTLINE,i,x,y);
}

static void init_feld(void)
{
int i,j;

	for ( i=0; i<XHEIGHT; i++ ) {
		for ( j=0; j<XWIDTH; j++ )
			feld[i][j]=0;
		feld[i][0]=feld[i][XWIDTH-1]=-1;
	}
	for ( j=0; j<XWIDTH; j++ )
		feld[XHEIGHT-1][j]=-1;

	for ( i=XHEIGHT-1-opts.columns.random; i<XHEIGHT-1; i++ ) {
		for ( j=1; j<XWIDTH-1; j++ ) {
			feld[i][j]=(int)(xrandom()%6+1);
			dr_block(j,i,feld[i][j]);
		}
	}
	copy_out();
}

static int check_stone(STONE *stone)
{
	if ( feld[stone->y+3][stone->x]!=0 )
		return 1;
	return 0;
}

static int xcheck(void)
{
int i,j;

	for ( i=0; i<FIRSTLINE; i++ )
		for ( j=1; j<XWIDTH-1; j++ )
			if ( feld[i][j]!=0 )
				return 1;
	return 0;
}

static int check_side(STONE *stone,int side)
{
	if ( feld[stone->y][stone->x+side]!=0 ||
			feld[stone->y+1][stone->x+side]!=0 ||
			feld[stone->y+2][stone->x+side]!=0 )
		return 1;
	return 0;
}

static void init_stone(void)
{
	next.x=XWIDTH/2;
	next.y=1;
	next.c[0]=(int)(xrandom()%6+1);
	next.c[1]=(int)(xrandom()%6+1);
	next.c[2]=(int)(xrandom()%6+1);
}

static int check_feld(uint *lines)
{
int flags[XHEIGHT][XWIDTH];
int i,j;
int ii;
int done=0;

	memset(flags,0,sizeof(flags));
	for ( i=FIRSTLINE; i<XHEIGHT-1; i++ ) {
		for ( j=1; j<XWIDTH-1; j++ ) {
			if ( feld[i][j]==0 )
				continue;
			if ( feld[i][j]==feld[i-1][j] && feld[i][j]==feld[i+1][j] ) {
				if ( flags[i-1][j]==0 )
					{ flags[i-1][j]=1; (*lines)++; }
				if ( flags[i][j]==0 )
					{ flags[i][j]=1; (*lines)++; }
				if ( flags[i+1][j]==0 )
					{ flags[i+1][j]=1; (*lines)++; }
				done=1;
			}
			if ( feld[i][j]==feld[i][j-1] && feld[i][j]==feld[i][j+1] ) {
				if ( flags[i][j-1]==0 )
					{ flags[i][j-1]=1; (*lines)++; }
				if ( flags[i][j]==0 )
					{ flags[i][j]=1; (*lines)++; }
				if ( flags[i][j+1]==0 )
					{ flags[i][j+1]=1; (*lines)++; }
				done=1;
			}
			if ( feld[i][j]==feld[i-1][j-1] && feld[i][j]==feld[i+1][j+1] ) {
				if ( flags[i-1][j-1]==0 )
					{ flags[i-1][j-1]=1; (*lines)++; }
				if ( flags[i][j]==0 )
					{ flags[i][j]=1; (*lines)++; }
				if ( flags[i+1][j+1]==0 )
					{ flags[i+1][j+1]=1; (*lines)++; }
				done=1;
			}
			if ( feld[i][j]==feld[i-1][j+1] && feld[i][j]==feld[i+1][j-1] ) {
				if ( flags[i-1][j+1]==0 )
					{ flags[i-1][j+1]=1; (*lines)++; }
				if ( flags[i][j]==0 )
					{ flags[i][j]=1; (*lines)++; }
				if ( flags[i+1][j-1]==0 )
					{ flags[i+1][j-1]=1; (*lines)++; }
				done=1;
			}
		}
	}
	if ( done ) {
		for ( ii=8; ii<=12; ii++ ) {
			init_wait();
			for ( i=FIRSTLINE; i<XHEIGHT-1; i++ ) {
				for ( j=1; j<XWIDTH-1; j++ ) {
					if ( flags[i][j] )
						dr_block(j,i,ii);
				}
			}
			copy_out();
			do_wait(5);
		}

		for ( j=1; j<XWIDTH-1; j++ ) {
			for ( ii=i=XHEIGHT-2; ii>=FIRSTLINE; ii--,i-- ) {
				while ( flags[i][j]!=0 )
					i--;
				if ( i<0 )
					i=0;
				if ( i!=ii ) {
					feld[ii][j]=feld[i][j];
					if ( feld[ii][j]==0 )
						dr_block(j,ii,0);
					else
						dr_block(j,ii,feld[ii][j]);
				}
			}
			for ( ; ii>=0; ii-- )
				feld[ii][j]=0;
		}
		copy_out();
	}
	return done;
}

int columns(void)
{
long time;
int draw,let_it_fall,drop_line;
uint level,delay;
uint stones,lines,score;
STONE x;
KEY key;
uint stat[6]={0,0,0,0,0,0};

	init_feld();
	while ( check_feld(&lines) )
		;

	level=opts.columns.start_level;
	delay=calc_delay(level);
	stones=lines=score=0;

	init_stone();

	while ( 1 ) {
		stone=next;

		init_stone();
		if ( preview_flag )
			dr_preview();

		stat[stone.c[0]-1]++;
		stat[stone.c[1]-1]++;
		stat[stone.c[2]-1]++;
		if ( stat_flag )
			dr_stat(stat);

		if ( check_stone(&stone) || xcheck() )	/* game over? */
			break;
		x=stone;					/* stein merken */

		stones++;
		if ( level<9 && lines>level*50+50 )
			{ level++; inv_feld(); delay=calc_delay(level); }
		dr_score(level,lines,stones,score);

		let_it_fall=0;				/* nicht fallen lassen */
		time=gettime();				/* zeit merken */
		draw=1;						/* zeichnen */

		while ( 1 ) {
			if ( draw ) {			/* nur wenn n”tig */
				dr_stone();			/* stein zeichnen */
				draw=0;				/* flag l”schen */
				copy_out();
			}

			if ( !let_it_fall )		/* falls fallen lassen */
				key=get_key();
			else
				key=NO_KEY;			/* kein zeichen einlesen */

			switch ( key ) {
			  case K_QUIT:
				return 0;
			  /*break;*/
			  case K_LEFT:
				if ( !check_side(&x,-1) )
					x.x--;
			  break;
			  case K_RIGHT:
				if ( !check_side(&x,+1) )
					x.x++;
			  break;
			  case K_ROTATE: {
			   int i;
				i=x.c[2];
				x.c[2]=x.c[1];
				x.c[1]=x.c[0];
				x.c[0]=i;
			  } break;
			  case K_DROP:
				let_it_fall=1;
				drop_line=x.y;
			  break;
			  case K_LEVEL:
				if ( level<9 ) {
				  	level++;
					inv_feld();
					delay=calc_delay(level);
					dr_score(level,lines,stones,score);
				}
			  break;
			  case K_NEXT:
				set_preview();
				if ( preview_flag )
					dr_preview();
			  break;
			  case K_INFO:
			  	set_score();
			  break;
			  case K_STAT:
			  	set_statistic();
			  	if ( stat_flag )
					dr_stat(stat);
			  break;
			  case K_STOP:
				xget_key();			/* taste mit warten holen */
				time=gettime();
			  break;
			}

			if ( gettime()>time+delay || (let_it_fall && gettime()>time+1) ) {
				if ( check_stone(&x) )/* eins tiefer */
					break;
				time=gettime();
				x.y++;
			}
			if ( memcmp(&x,&stone,sizeof(x)) ) {
				draw=1;				/* falls sich was getan hat */
				rm_stone();			/* stein neuzeichnen */
				stone=x;
			}
		}

		if ( memcmp(&x,&stone,sizeof(x)) ) {
			rm_stone();			/* stein neuzeichnen */
			stone=x;
			dr_stone();
			copy_out();
		}
									/* stein ist unten angekommen */
									/* eintragen ins feld */
		feld[stone.y][stone.x]=stone.c[0];
		feld[stone.y+1][stone.x]=stone.c[1];
		feld[stone.y+2][stone.x]=stone.c[2];

									/* steine wegr„umen */
		while ( check_feld(&lines) )
			;

									/* score berechnen */
		score+=5+level*2;
		if ( let_it_fall )
			score+=XHEIGHT-1-drop_line;
		else 
			score+=XHEIGHT-1-stone.y;
		if ( preview_flag )
			score-=3;

									/* tastaturpuffer l”schen */
		clr_keys();
	}
	clr_keys();
	dr_score(level,lines,stones,score);
	do_score(score,opts.col_hi);
	return 1;
}

int init_columns(void)
{
char name[16];
MFDB pic;
int i;

	sprintf(name,"COLUMNS%1d.IMG",planes);

	if ( !load_img(name,&pic) ) {
		cbloecke=pic;
		if ( planes>1 ) {
			cbloecke.fd_addr=malloc(pic.fd_wdwidth*2l*planes*pic.fd_h);
			pic.fd_stand=1;
			cbloecke.fd_stand=0;
			vr_trnfm(handle,&pic,&cbloecke);
		}
		BLOCK_SW=BLOCK_W=cbloecke.fd_w/16;
		BLOCK_H=cbloecke.fd_h;
		columns_vdi=1;
		dr_block=vdidr_block;
	}
	else if ( planes==1 ) {
		dr_block=qdr_block;
		columns_vdi=0;
	}
	else {
		columns_vdi=-1;
		return 0;
	}

	for ( i=1; i<XWIDTH; i++ )
		x_pos[i]=(i-1)*BLOCK_W;
	for ( i=FIRSTLINE; i<XHEIGHT; i++ )
		y_pos[i]=(i-FIRSTLINE)*BLOCK_H;
	BLOCK_XW=BLOCK_W-1;
	BLOCK_XH=BLOCK_H-1;

	return 1;
}