From: oetiker <oetiker@a5681a0c-68f1-0310-ab6d-d61299d08faa>
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: https://git.tokkee.org/?a=commitdiff_plain;h=479c94f65d273d41054ebda4a5d547dc93c308f1;p=rrdtool-all.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@2221 a5681a0c-68f1-0310-ab6d-d61299d08faa
---

diff --git a/program/src/rrd_graph.c b/program/src/rrd_graph.c
index 45218bc0..dbd8b3e9 100644
--- a/program/src/rrd_graph.c
+++ b/program/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,