/**
 ** GENERIC/BITMAP.C ---- generic (=slow) font or bitmap draw routine
 **
 ** Copyright (c) 1995 Csaba Biegl, 820 Stirrup Dr, Nashville, TN 37221
 ** [e-mail: csaba@vuse.vanderbilt.edu] See "doc/copying.cb" for details.
 **/

void drawbitmap(int x,int y,int w,int h,
		char far *bmp,int pitch,int start,GrColor fg,GrColor bg)
{
	GRX_ENTER();
	w += x; h += y;
	bmp += (unsigned int)start >> 3;
	start &= 7;
	do {
	    unsigned char far *bitp = (unsigned char far *)bmp;
	    unsigned char bits = *bitp;
	    unsigned char mask = 0x80 >> start;
	    int   xx = x;
	    do {
		drawpixel(xx,y,(bits & mask) ? fg : bg);
		if((mask >>= 1) == 0) bits = *++bitp,mask = 0x80;
	    } while(++xx != w);
	    bmp += pitch;
	} while(++y != h);
	GRX_LEAVE();
}