From: Rudolf Polzer <divverent@alientrap.org>
Date: Sat, 28 Aug 2010 09:29:36 +0000 (+0200)
Subject: do not write zero alpha values
X-Git-Tag: xonotic-v0.1.0preview~254
X-Git-Url: https://git.xonotic.org/?p=xonotic%2Fxonotic.git;a=commitdiff_plain;h=aa9677f5b9f06d0df5d7d23d775766dbaacfcc00;hp=443b4bfa9f18f22c56b22537ef856ad1ba617d74

do not write zero alpha values
---

diff --git a/misc/tools/fft-normalmap-to-heightmap.c b/misc/tools/fft-normalmap-to-heightmap.c
index 17f9fd89..8d95d5c6 100644
--- a/misc/tools/fft-normalmap-to-heightmap.c
+++ b/misc/tools/fft-normalmap-to-heightmap.c
@@ -270,6 +270,8 @@ void hmap_to_nmap(unsigned char *map, int w, int h, int src_chan, double scale)
 		imgspace1[(w*y+x)][0] = (v - 128.0) / 127.0;
 		imgspace1[(w*y+x)][1] = 0;
 #endif
+		if(v < 1)
+			v = 1; /* do not write alpha zero */
 		map[(w*y+x)*4+3] = floor(v + 0.5);
 	}
 
@@ -380,6 +382,8 @@ void hmap_to_nmap_local(unsigned char *map, int w, int h, int src_chan, double s
 				break;
 		}
 		img_reduced[(w*y+x)] = (v - 128.0) / 127.0;
+		if(v < 1)
+			v = 1; /* do not write alpha zero */
 		map[(w*y+x)*4+3] = floor(v + 0.5);
 	}