From: Tobias Oetiker <tobi@oetiker.ch>
Date: Thu, 24 Nov 2011 14:26:30 +0000 (+0000)
Subject: after fetching, data must be reduced to at least chart resolution, else some data... 
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a909d691cc9878dabceab29cdf8319fed26b8b0d;p=thirdparty%2Frrdtool-1.x.git

after fetching, data must be reduced to at least chart resolution, else some data will not get plotted. fix for #298

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2/program@2221 a5681a0c-68f1-0310-ab6d-d61299d08faa
---

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index 45218bc0..dbd8b3e9 100644
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -744,7 +744,12 @@ data_fetch(image_desc_t *im )
                 return -1;
             }
             im->gdes[i].data_first = 1;            
-        
+
+            /* must reduce to at least im->step
+               otherwhise we end up with more data than we can handle in the 
+               chart and visibility of data will be random */            
+            im->gdes[i].step = max(im->gdes[i].step,im->step);
+       
             if (ft_step < im->gdes[i].step) {
                 reduce_data(im->gdes[i].cf_reduce,
                             ft_step,