shithub: ifilter

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remove ifilter.c and update mkfile

--- a/ifilter.c

+++ /dev/null

@@ -1,131 +1,0 @@

-#include <u.h>

-#include <libc.h>

-#include <draw.h>

-#include <memdraw.h>

-

-#define MIN(x,y) ((x)<(y)?(x):(y))

-

-typedef struct Filter Filter;

-

-struct Filter

-{

-	const char *name;

-	void (*filter)(uchar[3], float);

-};

-

-void

-grayscale(uchar p[3], float)

-{

-	uchar v = 0.2126*p[2] + 0.7152*p[1] + 0.0722*p[0];

-	p[0] = p[1] = p[2] = v;

-}

-

-void

-sepia(uchar p[3], float)

-{

-	float r, g, b;

-

-	r = 0.393*p[2] + 0.769*p[1] + 0.189*p[0];

-	g = 0.349*p[2] + 0.686*p[1] + 0.168*p[0];

-	b = 0.272*p[2] + 0.534*p[1] + 0.131*p[0];

-	p[2] = MIN(r, 255);

-	p[1] = MIN(g, 255);

-	p[0] = MIN(b, 255);

-}

-

-void

-invert(uchar p[3], float)

-{

-	p[0] = 255 - p[0];

-	p[1] = 255 - p[1];

-	p[2] = 255 - p[2];

-}

-

-void

-shade(uchar p[3], float factor)

-{

-	p[0] = p[0] * (1 - factor);

-	p[1] = p[1] * (1 - factor);

-	p[2] = p[2] * (1 - factor);

-}

-

-void

-tint(uchar p[3], float factor)

-{

-	p[0] = p[0] + (255.0 - p[0]) * factor;

-	p[1] = p[1] + (255.0 - p[1]) * factor;

-	p[2] = p[2] + (255.0 - p[2]) * factor;

-}

-

-void

-usage(void)

-{

-	fprint(2, "usage: %s [-f factor] [grayscale|sepia|invert|shade|tint]\n", argv0);

-	exits("usage");

-}

-

-static Filter filters[] = {

-	{ "grayscale", grayscale },

-	{ "sepia", sepia },

-	{ "invert", invert },

-	{ "shade", shade },

-	{ "tint", tint },

-};

-

-void

-main(int argc, char *argv[])

-{

-	Memimage *o, *i;

-	int w, h, p, n;

-	uchar *buf;

-	Filter *f;

-	float factor;

-

-	f = nil;

-	factor = 0.0;

-	ARGBEGIN{

-	case 'f':

-		factor = (float)atof(EARGF(usage()));

-		break;

-	default:

-		usage();

-		break;

-	}ARGEND;

-	if(argc!=1)

-		usage();

-	for(n=0; n<nelem(filters); n++){

-		if(strcmp(*argv, filters[n].name)==0){

-			f = filters+n;

-			break;

-		}

-	}

-	if(f==nil)

-		usage();

-	if(factor<0.0 || factor>1.0){

-		fprint(2, "factor should be between 0.0 and 1.0\n");

-		exits("invalid factor");

-	}

-	if(memimageinit()<0)

-		sysfatal("memimageinit: %r");

-	o = readmemimage(0);

-	if(o==nil)

-		sysfatal("readmemimage: %r");

-	i = allocmemimage(o->r, XRGB32);

-	memimagedraw(i, i->r, o, o->r.min, nil, ZP, S);

-	freememimage(o);

-	w = Dx(i->r);

-	h = Dy(i->r);

-	n = 4*w*h*sizeof(uchar);

-	buf = malloc(n);

-	if(buf==nil)

-		sysfatal("malloc: %r");

-	if(unloadmemimage(i, i->r, buf, n)<0)

-		sysfatal("unloadmemimage: %r");

-	freememimage(i);

-	for(p = 0; p < n; p+=4)

-		f->filter(buf+p, factor);

-	print("   x8r8g8b8 %11d %11d %11d %11d ", 0, 0, w, h);

-	write(1, buf, n);

-	exits(nil);

-}

-

--- a/mkfile

+++ b/mkfile

@@ -2,7 +2,7 @@

 BIN=/$objtype/bin

 CFLAGS=-FTVw

-TARG=ifilter blur

+TARG=cfilter blur

 default:V: all