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/*
* Copyright © 2018 Benjamin Otte
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "fpsoverlay.h"
#include "gtkintl.h"
#include "gtkwidget.h"
#include "gtkwindow.h"
#include "gtknative.h"
/* duration before we start fading in us */
#define GDK_FPS_OVERLAY_LINGER_DURATION (1000 * 1000)
/* duration when fade is finished in us */
#define GDK_FPS_OVERLAY_FADE_DURATION (500 * 1000)
typedef struct _GtkFpsInfo {
gint64 last_frame;
GskRenderNode *last_node;
} GtkFpsInfo;
struct _GtkFpsOverlay
{
GtkInspectorOverlay parent_instance;
GHashTable *infos; /* GtkWidget => GtkFpsInfo */
};
struct _GtkFpsOverlayClass
{
GtkInspectorOverlayClass parent_class;
};
G_DEFINE_TYPE (GtkFpsOverlay, gtk_fps_overlay, GTK_TYPE_INSPECTOR_OVERLAY)
static void
gtk_fps_info_free (gpointer data)
{
GtkFpsInfo *info = data;
gsk_render_node_unref (info->last_node);
g_slice_free (GtkFpsInfo, info);
}
static double
gtk_fps_overlay_get_fps (GtkWidget *widget)
{
GdkFrameClock *frame_clock;
frame_clock = gtk_widget_get_frame_clock (widget);
if (frame_clock == NULL)
return 0.0;
return gdk_frame_clock_get_fps (frame_clock);
}
static gboolean
gtk_fps_overlay_force_redraw (GtkWidget *widget,
GdkFrameClock *clock,
gpointer unused)
{
gdk_surface_queue_render (gtk_native_get_surface (gtk_widget_get_native (widget)));
return G_SOURCE_REMOVE;
}
static void
gtk_fps_overlay_snapshot (GtkInspectorOverlay *overlay,
GtkSnapshot *snapshot,
GskRenderNode *node,
GtkWidget *widget)
{
GtkFpsOverlay *self = GTK_FPS_OVERLAY (overlay);
GtkFpsInfo *info;
PangoLayout *layout;
PangoAttrList *attrs;
gint64 now;
double fps;
char *fps_string;
graphene_rect_t bounds;
gboolean has_bounds;
double overlay_opacity;
PangoRectangle ext;
now = gdk_frame_clock_get_frame_time (gtk_widget_get_frame_clock (widget));
info = g_hash_table_lookup (self->infos, widget);
if (info == NULL)
{
info = g_slice_new0 (GtkFpsInfo);
g_hash_table_insert (self->infos, widget, info);
}
if (info->last_node != node)
{
g_clear_pointer (&info->last_node, gsk_render_node_unref);
info->last_node = gsk_render_node_ref (node);
info->last_frame = now;
overlay_opacity = 1.0;
}
else
{
if (now - info->last_frame > GDK_FPS_OVERLAY_LINGER_DURATION + GDK_FPS_OVERLAY_FADE_DURATION)
{
g_hash_table_remove (self->infos, widget);
return;
}
else if (now - info->last_frame > GDK_FPS_OVERLAY_LINGER_DURATION)
{
overlay_opacity = 1.0 - (double) (now - info->last_frame - GDK_FPS_OVERLAY_LINGER_DURATION)
/ GDK_FPS_OVERLAY_FADE_DURATION;
}
else
{
overlay_opacity = 1.0;
}
}
fps = gtk_fps_overlay_get_fps (widget);
if (fps == 0.0)
fps_string = g_strdup ("--- fps");
else
fps_string = g_strdup_printf ("%.2f fps", fps);
if (GTK_IS_WINDOW (widget))
{
GtkWidget *child = gtk_window_get_child (GTK_WINDOW (widget));
if (!child ||
!gtk_widget_compute_bounds (child, widget, &bounds))
has_bounds = gtk_widget_compute_bounds (widget, widget, &bounds);
else
has_bounds = gtk_widget_compute_bounds (child, widget, &bounds);
}
else
{
has_bounds = gtk_widget_compute_bounds (widget, widget, &bounds);
}
layout = gtk_widget_create_pango_layout (widget, fps_string);
attrs = pango_attr_list_new ();
pango_attr_list_insert (attrs, pango_attr_font_features_new ("tnum=1"));
pango_layout_set_attributes (layout, attrs);
pango_attr_list_unref (attrs);
pango_lines_get_extents (pango_layout_get_lines (layout), NULL, &ext);
pango_extents_to_pixels (&ext, NULL);
gtk_snapshot_save (snapshot);
if (has_bounds)
gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (bounds.origin.x + bounds.size.width - ext.width, bounds.origin.y));
if (overlay_opacity < 1.0)
gtk_snapshot_push_opacity (snapshot, overlay_opacity);
gtk_snapshot_append_color (snapshot,
&(GdkRGBA) { 0, 0, 0, 0.5 },
&GRAPHENE_RECT_INIT (-1, -1, ext.width + 2, ext.height + 2));
gtk_snapshot_append_layout (snapshot,
layout,
&(GdkRGBA) { 1, 1, 1, 1 });
if (overlay_opacity < 1.0)
gtk_snapshot_pop (snapshot);
gtk_snapshot_restore (snapshot);
g_free (fps_string);
gtk_widget_add_tick_callback (widget, gtk_fps_overlay_force_redraw, NULL, NULL);
}
static void
gtk_fps_overlay_queue_draw (GtkInspectorOverlay *overlay)
{
GtkFpsOverlay *self = GTK_FPS_OVERLAY (overlay);
GHashTableIter iter;
gpointer widget;
g_hash_table_iter_init (&iter, self->infos);
while (g_hash_table_iter_next (&iter, &widget, NULL))
gdk_surface_queue_render (gtk_native_get_surface (gtk_widget_get_native (widget)));
}
static void
gtk_fps_overlay_dispose (GObject *object)
{
GtkFpsOverlay *self = GTK_FPS_OVERLAY (object);
g_hash_table_unref (self->infos);
G_OBJECT_CLASS (gtk_fps_overlay_parent_class)->dispose (object);
}
static void
gtk_fps_overlay_class_init (GtkFpsOverlayClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkInspectorOverlayClass *overlay_class = GTK_INSPECTOR_OVERLAY_CLASS (klass);
overlay_class->snapshot = gtk_fps_overlay_snapshot;
overlay_class->queue_draw = gtk_fps_overlay_queue_draw;
gobject_class->dispose = gtk_fps_overlay_dispose;
}
static void
gtk_fps_overlay_init (GtkFpsOverlay *self)
{
self->infos = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, gtk_fps_info_free);
}
GtkInspectorOverlay *
gtk_fps_overlay_new (void)
{
GtkFpsOverlay *self;
self = g_object_new (GTK_TYPE_FPS_OVERLAY, NULL);
return GTK_INSPECTOR_OVERLAY (self);
}
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