[babl] stats: remove false negatives from HTML stats output

[Øyvind Kolås <ok src gnome org>]

commit 6bbf401cbde5414c0e5fef53c3725df7c4aced73
Author: �yvind Kolås <pippin gimp org>
Date:   Sun Apr 17 17:22:12 2011 +0100

    stats: remove false negatives from HTML stats output
    
    too many of the conversions are flagged as bad in the matrix change code so
    that only conversions that contribute to more than 0.1% of the overall pixels
    converted by babl are shown in the stats written when BABL_STATS environment
    variable is set.

 babl/babl-fish-stats.c |   46 ++++++++++++++++++++++++++++++++++++++++++----
 1 files changed, 42 insertions(+), 4 deletions(-)
---
diff --git a/babl/babl-fish-stats.c b/babl/babl-fish-stats.c
index 7b853b1..f5b3e2a 100644
--- a/babl/babl-fish-stats.c
+++ b/babl/babl-fish-stats.c
@@ -29,6 +29,41 @@ static char *utf8_bar[]={"·", "â??", "â??", "â??", "â??", "â??", "â??", "â??",
 static char *utf8_bar[]={" ","1","2","3","4","5","6","7","8"};
 */
 
+static double sum_pixels = 0.0;
+
+static int
+table_destination_sum_each (Babl *babl,
+                            void *userdata)
+{
+  Babl *source      = userdata;
+  Babl *destination = babl;
+
+  if (source != destination)
+    {
+      Babl *fish = babl_fish (source, destination);
+      babl_assert (fish);
+      sum_pixels += fish->fish.pixels;
+    }
+  return 0;
+}
+
+static int
+table_source_sum_each (Babl *babl,
+                       void *userdata)
+{
+  babl_format_class_for_each (table_destination_sum_each, babl);
+  return 0;
+}
+
+static void
+table_sum_processings_calc (void)
+{
+  sum_pixels = 0;
+  babl_format_class_for_each (table_source_sum_each, NULL);
+}
+
+#define LIMIT 0.001
+
 static int
 table_destination_each (Babl *babl,
                         void *userdata)
@@ -51,7 +86,7 @@ table_destination_each (Babl *babl,
           case BABL_FISH_PATH:
 
             fprintf (output_file, "<td class='cell'%s><a href='javascript:o()'>%s",
-                     fish->fish.processings > 0 ? " style='background-color: #69f'" : "",
+                     fish->fish.pixels / sum_pixels > LIMIT ? " style='background-color: #69f'" : "",
                      utf8_bar[babl_list_size (fish->fish_path.conversion_list)]);
 
             {
@@ -95,11 +130,11 @@ table_destination_each (Babl *babl,
 
           case BABL_FISH_REFERENCE:
             fprintf (output_file, "<td class='cell'%s><a href='javascript:o()'>&nbsp",
-                     fish->fish.processings > 0 ? " style='background-color: #f99'" : "");
+                     fish->fish.pixels / sum_pixels > LIMIT ? " style='background-color: #f99'" : "");
             fprintf (output_file, "<div class='tooltip'>");
             fprintf (output_file, "<h3><span class='g'>Reference</span> %s <span class='g'>to</span> %s</h3>", source->instance.name, destination->instance.name);
 
-            if (fish->fish.processings > 0)
+            if (fish->fish.processings > 1)
               {
                 fprintf (output_file, "<span class='g'>Processings:</span>%i<br/>", fish->fish.processings);
                 fprintf (output_file, "<span class='g'>Pixels:</span>%li<br/>", fish->fish.pixels);
@@ -110,7 +145,7 @@ table_destination_each (Babl *babl,
 
           case BABL_FISH_SIMPLE:
             fprintf (output_file, "<td class='cell'%s><a href='javascript:o()'>&middot;",
-                     fish->fish.processings > 1 ? " style='background-color: #69f'" : "");
+                     fish->fish.pixels / sum_pixels > LIMIT ? " style='background-color: #69f'" : "");
             fprintf (output_file, "<div class='tooltip'>");
             fprintf (output_file, "<h3><span class='g'>Simple</span> %s <span class='g'>to</span> %s</h3>", source->instance.name, destination->instance.name);
 
@@ -138,6 +173,8 @@ table_destination_each (Babl *babl,
 
 static int source_no = 0;
 
+
+
 static int
 table_source_each (Babl *babl,
                    void *userdata)
@@ -264,6 +301,7 @@ babl_fish_stats (FILE *file)
 {
   output_file = file;
 
+  table_sum_processings_calc ();
   fprintf (output_file,
            "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
            "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\";>\n"