[sysprof] visualizers: use double instead of float

[Christian Hergert <chergert src gnome org>]

commit 50ccd73592e2e6c73826e9d1929846b180910249
Author: Christian Hergert <chergert redhat com>
Date:   Sat Jun 16 20:22:53 2018 -0700

    visualizers: use double instead of float
    
    To give us less changes of incorrect values when converting between scales
    (at the cost of 2x the array size).

 lib/util/pointcache.c                    |  4 ++--
 lib/util/pointcache.h                    |  8 ++++----
 lib/visualizers/sp-line-visualizer-row.c | 14 +++++++-------
 lib/visualizers/sp-visualizer-row.h      |  4 ++--
 4 files changed, 15 insertions(+), 15 deletions(-)
---
diff --git a/lib/util/pointcache.c b/lib/util/pointcache.c
index 6530e46..ccdf140 100644
--- a/lib/util/pointcache.c
+++ b/lib/util/pointcache.c
@@ -80,8 +80,8 @@ point_cache_contains_set (PointCache *self,
 void
 point_cache_add_point_to_set (PointCache *self,
                               guint       set_id,
-                              gfloat      x,
-                              gfloat      y)
+                              gdouble     x,
+                              gdouble     y)
 {
   GArray *ar;
   Point point = { x, y };
diff --git a/lib/util/pointcache.h b/lib/util/pointcache.h
index 1058df7..5accceb 100644
--- a/lib/util/pointcache.h
+++ b/lib/util/pointcache.h
@@ -27,8 +27,8 @@ typedef struct _PointCache PointCache;
 
 typedef struct
 {
-  gfloat x;
-  gfloat y;
+  gdouble x;
+  gdouble y;
 } Point;
 
 PointCache  *point_cache_new              (void);
@@ -40,8 +40,8 @@ gboolean     point_cache_contains_set     (PointCache *self,
                                            guint       set_id);
 void         point_cache_add_point_to_set (PointCache *self,
                                            guint       set_id,
-                                           gfloat      x,
-                                           gfloat      y);
+                                           gdouble     x,
+                                           gdouble     y);
 const Point *point_cache_get_points       (PointCache *self,
                                            guint       set_id,
                                            guint      *n_points);
diff --git a/lib/visualizers/sp-line-visualizer-row.c b/lib/visualizers/sp-line-visualizer-row.c
index e00594b..b69d884 100644
--- a/lib/visualizers/sp-line-visualizer-row.c
+++ b/lib/visualizers/sp-line-visualizer-row.c
@@ -170,8 +170,8 @@ sp_line_visualizer_row_draw (GtkWidget *widget,
 
       if (n_fpoints > 0)
         {
-          gfloat last_x;
-          gfloat last_y;
+          gdouble last_x;
+          gdouble last_y;
 
           points = g_new0 (SpVisualizerRowAbsolutePoint, n_fpoints);
 
@@ -534,7 +534,7 @@ counter_type (LoadData *load,
   return SP_CAPTURE_COUNTER_DOUBLE;
 }
 
-static inline gfloat
+static inline gdouble
 calc_x (gint64 lower,
         gint64 upper,
         gint64 value)
@@ -542,7 +542,7 @@ calc_x (gint64 lower,
   return (gdouble)(value - lower) / (gdouble)(upper - lower);
 }
 
-static inline gfloat
+static inline gdouble
 calc_y_double (gdouble lower,
                gdouble upper,
                gdouble value)
@@ -550,7 +550,7 @@ calc_y_double (gdouble lower,
   return (value - lower) / (upper - lower);
 }
 
-static inline gfloat
+static inline gdouble
 calc_y_int64 (gint64 lower,
               gint64 upper,
               gint64 value)
@@ -572,7 +572,7 @@ sp_line_visualizer_row_load_data_frame_cb (const SpCaptureFrame *frame,
   if (frame->type == SP_CAPTURE_FRAME_CTRSET)
     {
       const SpCaptureFrameCounterSet *set = (SpCaptureFrameCounterSet *)frame;
-      gfloat x = calc_x (load->begin_time, load->end_time, frame->time);
+      gdouble x = calc_x (load->begin_time, load->end_time, frame->time);
 
       for (guint i = 0; i < set->n_values; i++)
         {
@@ -584,7 +584,7 @@ sp_line_visualizer_row_load_data_frame_cb (const SpCaptureFrame *frame,
 
               if (counter_id != 0 && contains_id (load->lines, counter_id))
                 {
-                  gfloat y;
+                  gdouble y;
 
                   if (counter_type (load, counter_id) == SP_CAPTURE_COUNTER_DOUBLE)
                     y = calc_y_double (load->y_lower, load->y_upper, group->values[j].vdbl);
diff --git a/lib/visualizers/sp-visualizer-row.h b/lib/visualizers/sp-visualizer-row.h
index c7f6163..2f15d95 100644
--- a/lib/visualizers/sp-visualizer-row.h
+++ b/lib/visualizers/sp-visualizer-row.h
@@ -32,8 +32,8 @@ G_DECLARE_DERIVABLE_TYPE (SpVisualizerRow, sp_visualizer_row, SP, VISUALIZER_ROW
 
 typedef struct
 {
-  gfloat x;
-  gfloat y;
+  gdouble x;
+  gdouble y;
 } SpVisualizerRowRelativePoint;
 
 typedef struct