version update

[goodguy/cinelerra.git] / cinelerra-5.1 / plugins / histogram / histogram.C

diff --git a/cinelerra-5.1/plugins/histogram/histogram.C b/cinelerra-5.1/plugins/histogram/histogram.C
index da67c208694425820ffdc42af07f0949562086d7..523c863f3e0bc142c8b372dbde030f44c147a737 100644 (file)
--- a/cinelerra-5.1/plugins/histogram/histogram.C
+++ b/cinelerra-5.1/plugins/histogram/histogram.C
@@ -280,7 +280,8 @@ float HistogramMain::calculate_level(float input,
 // Scale to input range
        if(!EQUIV(config.high_input[mode], config.low_input[mode]))
        {
-               output = (input - config.low_input[mode]) /
+               output = input < config.low_input[mode] ? 0 :
+                   (input - config.low_input[mode]) /
                        (config.high_input[mode] - config.low_input[mode]);
        }
        else
@@ -457,8 +458,8 @@ int HistogramMain::process_buffer(VFrame *frame,
                if( cpus > smps ) cpus = smps;
                engine = new HistogramEngine(this, cpus, cpus);
        }
-// Always plot to set the curves if automatic
-       if(config.plot || config.automatic) send_render_gui(frame);
+// if to plot histogram
+       if(config.plot) send_render_gui(frame);
 
 // Generate tables here.  The same table is used by many packages to render
 // each horizontal stripe.  Need to cover the entire output range in  each