From b5c9d86fbefdc3402be2e6615bae0bc444a1d491 Mon Sep 17 00:00:00 2001
From: Simon Robertshaw <simon@hardwired.org.uk>
Date: Wed, 8 Jun 2011 13:30:39 +0100
Subject: [PATCH] Less blurry thumbnail scaling

---
 includes/graphics.h |  2 ++
 src/graphics.c      | 12 ++++++++++++
 src/main.c          |  4 ++--
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/includes/graphics.h b/includes/graphics.h
index 748946052..2d556383d 100644
--- a/includes/graphics.h
+++ b/includes/graphics.h
@@ -52,6 +52,8 @@ void *ptif_pack(pixel *src, int w, int h, int *result_size);
 
 pixel *ptif_unpack(void *datain, int size, int *w, int *h);
 
+pixel *resample_img_nn(pixel *src, int sw, int sh, int rw, int rh);
+
 pixel *resample_img(pixel *src, int sw, int sh, int rw, int rh);
 
 pixel *rescale_img(pixel *src, int sw, int sh, int *qw, int *qh, int f);
diff --git a/src/graphics.c b/src/graphics.c
index 0b8b8f826..af628622f 100644
--- a/src/graphics.c
+++ b/src/graphics.c
@@ -140,6 +140,18 @@ pixel *ptif_unpack(void *datain, int size, int *w, int *h){
 	return result;
 }
 
+pixel *resample_img_nn(pixel * src, int sw, int sh, int rw, int rh)
+{
+	int y, x;
+	pixel *q = NULL;
+	q = malloc(rw*rh*PIXELSIZE);
+	for (y=0; y<rh; y++)
+		for (x=0; x<rw; x++){
+			q[rw*y+x] = src[sw*(y*sh/rh)+(x*sw/rw)];
+		}
+	return q;
+}
+
 pixel *resample_img(pixel *src, int sw, int sh, int rw, int rh)
 {
 	int y, x;
diff --git a/src/main.c b/src/main.c
index 08f0f5c44..3dd1f2b48 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1482,8 +1482,8 @@ int main(int argc, char *argv[])
 			free(datares);
 			datares = NULL;
 		}
-		scaled_buf = resample_img(vid_buf, XRES, YRES, XRES/4, YRES/4);
-		datares = ptif_pack(scaled_buf, XRES/4, YRES/4, &res);
+		scaled_buf = resample_img(vid_buf, XRES, YRES, XRES/GRID_Z, YRES/GRID_Z);
+		datares = ptif_pack(scaled_buf, XRES/GRID_Z, YRES/GRID_Z, &res);
 		if(datares!=NULL){
 			f=fopen(ptismallfilename, "wb");
 			fwrite(datares, res, 1, f);