/* * picjoin -- horizontal picture concatenation */#include <u.h>#include <libc.h>#include <libg.h>#include <fb.h>#define	NIN	150main(int argc, char *argv[]){	int y;	char *buf, *bp;	int nin, i, wid, hgt, bg;	PICFILE *in[NIN];	PICFILE *out;	argc=getflags(argc, argv, "b:1[background]");	nin=argc-1;	if(nin<1) usage("picture ...");	if(nin>NIN){		fprint(2, "%s: too many inputs\n", argv[0]);		exits("many files");	}	bg=flag['b']?atoi(flag['b'][0]):0;	wid=0;	hgt=0;	for(i=0;i!=nin;i++){		in[i]=picopen_r(argv[i+1]);		if(in[i]==0){			perror(argv[i+1]);			exits("open input");		}		if(PIC_HEIGHT(in[i])>hgt) hgt=PIC_HEIGHT(in[i]);		wid+=PIC_WIDTH(in[i]);		if(PIC_NCHAN(in[i])!=PIC_NCHAN(in[0])){			fprint(2, "%s: channel number mismatch\n", argv[0]);			exits("nchan different");		}	}	buf=malloc(wid*PIC_NCHAN(in[0]));	if(buf==0){		fprint(2, "%s: out of space\n", argv[0]);		exits("no space");	}	out=picopen_w("OUT", in[0]->type, PIC_XOFFS(in[0]), PIC_YOFFS(in[0]), wid, hgt,		in[0]->chan, argv, in[0]->cmap);	if(out==0){		perror(argv[0]);		exits("open output");	}	for(y=0;y!=hgt;y++){		bp=buf;		for(i=0;i!=nin;i++){			if(y<PIC_HEIGHT(in[i]))				picread(in[i], bp);			else if(y==PIC_HEIGHT(in[i]))				memset(bp, bg, PIC_WIDTH(in[i])*PIC_NCHAN(in[i]));			bp+=PIC_WIDTH(in[i])*PIC_NCHAN(in[i]);		}		picwrite(out, buf);	}	exits("");}