/*
 *
 * overlay.c - part of Danovitsch Webcam
 *
 * Copyright (C) 2001 by Daan Vreeken
 *
 * Published under the terms of the GNU Public License 2.0
 * (or any later version)
 *
 */




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

#include "capture.h"
#include "overlayfont.h"
#include "webcam.h"



unsigned long		White = 0xffffff;
unsigned long		Black = 0x000000;
unsigned long		Red = 0xff0000;
unsigned long		Green = 0x00ff00;
unsigned long		Blue = 0x0000ff;



void Overlay_Pixel(int X, int Y, unsigned long *Color)
{
	unsigned long		*Ptr = (unsigned long *)FrameBuffer;

	if (FrameBuffer==NULL)
		return;
	if ((X<0) || (Y<0) || (X>=ImageWidth) || (Y>=ImageHeight))
		return;

	Ptr+=X + Y*ImageWidth;
	*Ptr=*Color;
}



void Overlay_PutLetter(int X1, int Y1, unsigned char Letter, unsigned long *Color, unsigned long *BgColor)
{
	int		X,Y;
	int		Bit;

	for (Y=0; Y<16; Y++)
		for (X=0; X<8; X++)
		{
			Bit=(Overlay_Font[Letter][Y] << X) & 128;

			if (Bit)
			{
				if (Color!=NULL)
					Overlay_Pixel(X1+X,Y1+Y,Color);
			}
			else
			{
				if (BgColor!=NULL)
					Overlay_Pixel(X1+X,Y1+Y,BgColor);
			}
		}
}



void Overlay_PutString(int X, int Y, unsigned long *Color, unsigned long *BgColor, char *Txt)
{
	char		*Ptr = Txt;

	while (*Ptr)
	{
		Overlay_PutLetter(X,Y,*Ptr++,Color,BgColor);
		X+=8;
	}
}





void Overlay_PrintF(int X, int Y, int Border, unsigned long *Color, unsigned long *BgColor, char *Txt, ...)
{
	va_list		List;
	char		Buf[100];

	va_start(List,Txt);

	vsnprintf(Buf,sizeof(Buf),Txt,List);
	Buf[sizeof(Buf)-1]=0;

	va_end(List);

	if (Border)
	{
		Overlay_PutString(X-1,Y,BgColor,NULL,Buf);
		Overlay_PutString(X+1,Y,BgColor,NULL,Buf);
		Overlay_PutString(X,Y-1,BgColor,NULL,Buf);
		Overlay_PutString(X,Y+1,BgColor,NULL,Buf);
		Overlay_PutString(X,Y,Color,NULL,Buf);
	}
	else
		Overlay_PutString(X,Y,Color,BgColor,Buf);
}