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/* Benchmark/Frames
*
* This demo is intentionally as simple as possible, to see what
* framerate the windowing system can deliver on its own.
*
* It does nothing but change the drawn color, for every frame.
*/
#include <gtk/gtk.h>
typedef struct
{
GtkWidget parent_instance;
GdkRGBA color1;
GdkRGBA color2;
guint64 time2;
float t;
guint tick_cb;
} ColorWidget;
typedef struct
{
GtkWidgetClass parent_class;
} ColorWidgetClass;
G_DEFINE_TYPE (ColorWidget, color_widget, GTK_TYPE_WIDGET)
#define TIME_SPAN (3.0 * G_TIME_SPAN_SECOND)
static gboolean
change_color (GtkWidget *widget,
GdkFrameClock *frame_clock,
gpointer data)
{
ColorWidget *color = (ColorWidget *)widget;
gint64 time;
time = gdk_frame_clock_get_frame_time (frame_clock);
if (time >= color->time2)
{
color->time2 = time + TIME_SPAN;
color->color1 = color->color2;
color->color2.red = g_random_double_range (0, 1);
color->color2.green = g_random_double_range (0, 1);
color->color2.blue = g_random_double_range (0, 1);
color->color2.alpha = 1;
}
color->t = 1 - (color->time2 - time) / TIME_SPAN;
gtk_widget_queue_draw (widget);
return G_SOURCE_CONTINUE;
}
static void
color_widget_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
ColorWidget *color = (ColorWidget *)widget;
float w, h;
GdkRGBA c;
w = gtk_widget_get_width (widget);
h = gtk_widget_get_height (widget);
c.red = (1 - color->t) * color->color1.red + color->t * color->color2.red;
c.green = (1 - color->t) * color->color1.green + color->t * color->color2.green;
c.blue = (1 - color->t) * color->color1.blue + color->t * color->color2.blue;
c.alpha = 1;
gtk_snapshot_append_color (snapshot, &c, &GRAPHENE_RECT_INIT (0, 0, w, h));
}
static void
color_widget_init (ColorWidget *color)
{
gtk_widget_add_tick_callback (GTK_WIDGET (color), change_color, NULL, NULL);
gtk_widget_set_hexpand (GTK_WIDGET (color), TRUE);
gtk_widget_set_vexpand (GTK_WIDGET (color), TRUE);
}
static void
color_widget_class_init (ColorWidgetClass *class)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
widget_class->snapshot = color_widget_snapshot;
}
GtkWidget *
color_widget_new (void)
{
return g_object_new (color_widget_get_type (), NULL);
}
static gboolean
update_fps_label (gpointer data)
{
GtkWidget *label = GTK_WIDGET (data);
GdkFrameClock *frame_clock;
frame_clock = gtk_widget_get_frame_clock (label);
if (frame_clock)
{
char *fps;
fps = g_strdup_printf ("%.2f fps", gdk_frame_clock_get_fps (frame_clock));
gtk_label_set_label (GTK_LABEL (label), fps);
g_free (fps);
}
else
gtk_label_set_label (GTK_LABEL (label), "");
return G_SOURCE_CONTINUE;
}
static void
remove_id (gpointer data)
{
guint id = GPOINTER_TO_UINT (data);
g_source_remove (id);
}
GtkWidget *
do_frames (GtkWidget *do_widget)
{
static GtkWidget *window = NULL;
if (!window)
{
GtkBuilder *builder;
GtkWidget *box;
GtkWidget *label;
guint id;
builder = gtk_builder_new_from_resource ("/frames/frames.ui");
window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
gtk_window_set_display (GTK_WINDOW (window),
gtk_widget_get_display (do_widget));
label = GTK_WIDGET (gtk_builder_get_object (builder, "fps"));
box = GTK_WIDGET (gtk_builder_get_object (builder, "box"));
gtk_box_append (GTK_BOX (box), color_widget_new ());
id = g_timeout_add (500, update_fps_label, label);
g_object_set_data_full (G_OBJECT (label), "tick_cb",
GUINT_TO_POINTER (id), remove_id);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_window_destroy (GTK_WINDOW (window));
return window;
}
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