make --font more flexible:

* TITLE:30:   just alter the size of the title
* DEFAULT:0:/tmp/funfont.ttf  alter the font but not the size

git-svn-id: svn://svn.oetiker.ch/rrdtool/branches/1.2/program@616 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/doc/rrdgraph.pod b/doc/rrdgraph.pod
index 121a65e..c4ee169 100644 (file)
--- a/doc/rrdgraph.pod
+++ b/doc/rrdgraph.pod
@@ -266,7 +266,7 @@ A green arrow is made by: C<--color ARROW:00FF00>
 
 Zoom the graphics by the given amount. The factor must be E<gt> 0
 
-[B<-n>|B<--font> I<FONTTAG>B<:>I<size>B<:>I<font>]
+[B<-n>|B<--font> I<FONTTAG>B<:>I<size>B<:>[I<font>]]
 
 This lets you customize which font to use for the various text
 elements on the RRD graphs. C<DEFAULT> sets the default value for all
@@ -275,6 +275,13 @@ for the vertical unit label, C<LEGEND> for the graph legend.
 
 Use Times for the title: C<--font TITLE:13:/usr/lib/fonts/times.ttf>
 
+If you do not give a font string you can modify just the sice of the default font:
+C<--font TITLE:13:>.
+
+If you specify the size 0 then you can modify just the font without touching
+the size. This is especially usefull for altering the default font without
+resetting the default fontsizes: C<--font DEFAULT:0:/usr/lib/fonts/times.ttf>.
+
 RRDtool comes with a preset default font. You can set the environment
 variable C<RRD_DEFAULT_FONT> if you want to change this.
 

diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index 8b8a962..ebd91fb 100644 (file)
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -3152,20 +3152,17 @@ rrd_graph_options(int argc, char *argv[],image_desc_t *im)
            if(sscanf(optarg,
                                "%10[A-Z]:%lf:%1000s",
                                prop,&size,font) == 3){
-               int sindex;
+               int sindex,propidx;
                if((sindex=text_prop_conv(prop)) != -1){
-                   im->text_prop[sindex].size=size;              
-                   strcpy(im->text_prop[sindex].font,font);
-                   if (sindex==0) { /* the default */
-                       im->text_prop[TEXT_PROP_TITLE].size=size;
-                       strcpy(im->text_prop[TEXT_PROP_TITLE].font,font);
-                       im->text_prop[TEXT_PROP_AXIS].size=size;
-                       strcpy(im->text_prop[TEXT_PROP_AXIS].font,font);
-                       im->text_prop[TEXT_PROP_UNIT].size=size;
-                       strcpy(im->text_prop[TEXT_PROP_UNIT].font,font);
-                       im->text_prop[TEXT_PROP_LEGEND].size=size;
-                       strcpy(im->text_prop[TEXT_PROP_LEGEND].font,font);
-                   }
+                  for (propidx=sindex;propidx<TEXT_PROP_LAST;propidx++){                     
+                     if (size > 0){
+                         im->text_prop[propidx].size=size;              
+                      }
+                     if (strlen(font) > 0){
+                         strcpy(im->text_prop[propidx].font,font);
+                      }
+                      if (propidx==sindex && sindex != 0) break;
+                  }
                } else {
                    rrd_set_error("invalid fonttag '%s'",prop);
                    return;