From 2b5ab91775b97d9e53b2c92a45164703855029a2 Mon Sep 17 00:00:00 2001
From: glenda <glenda@PC192-168-2-10>
Date: Wed, 23 Sep 2015 17:52:35 +0200
Subject: [PATCH] resize: add -n for nearest neighbour

---
 sys/src/cmd/resize.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sys/src/cmd/resize.c b/sys/src/cmd/resize.c
index 40dbab74a..eb0235a4f 100644
--- a/sys/src/cmd/resize.c
+++ b/sys/src/cmd/resize.c
@@ -3,6 +3,8 @@
 #include <draw.h>
 #include <memdraw.h>
 
+int nflag;
+
 static void
 resample(Memimage *dst, Rectangle r, Memimage *src, Rectangle sr)
 {
@@ -29,6 +31,8 @@ resample(Memimage *dst, Rectangle r, Memimage *src, Rectangle sr)
 	for(dp.y=0; dp.y<=dsize.y; dp.y++){
 		sp.y = _sp.y>>12;
 		ty = _sp.y&0xFFF;
+		if(nflag)
+			ty = ty << 1 & 0x1000;
 		pdst = pdst0;
 		sp.x = sr.min.x;
 		psrc0 = byteaddr(src, sp);
@@ -36,6 +40,8 @@ resample(Memimage *dst, Rectangle r, Memimage *src, Rectangle sr)
 		for(dp.x=0; dp.x<=dsize.x; dp.x++){
 			sp.x = _sp.x>>12;
 			tx = _sp.x&0xFFF;
+			if(nflag)
+				tx = tx << 1 & 0x1000;
 			psrc = psrc0 + sp.x*bpp;
 			s00 = (0x1000-tx)*(0x1000-ty);
 			s01 = tx*(0x1000-ty);
@@ -109,6 +115,9 @@ main(int argc, char **argv)
 	case 'y':
 		ysize = getsize(EARGF(usage()));
 		break;
+	case 'n':
+		nflag++;
+		break;
 	default:
 		usage();
 	}ARGEND