karma/flying-balls
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using draw signals.

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This commit is contained in:
Antonio Carzaniga 2021-06-13 17:38:07 +02:00
parent b7b39e4034
commit fb00e29a0d
1 changed files with 29 additions and 24 deletions
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53
balls.c
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@ -647,11 +647,6 @@ gint keyboard_input (GtkWidget *widget, GdkEventKey *event) {
return TRUE;
}
gboolean expose_event (GtkWidget *widget, GdkEventExpose *event, gpointer data) {
draw_balls_onto_window();
return TRUE;
}
void destroy_window (void) {
gtk_main_quit();
}
@ -675,34 +670,44 @@ void print_usage (const char * progname) {
progname);
}
unsigned int stats_sampling = 0;
static unsigned int stats_sampling = 0;
static guint64 stats_update_usec = 0;
static unsigned int stats_update_samples = 0;
static guint64 stats_draw_usec = 0;
static unsigned int stats_draw_samples = 0;
gboolean draw_event (GtkWidget *widget, cairo_t *cr, gpointer data) {
if (stats_sampling > 0) {
guint64 start = g_get_monotonic_time ();
draw_balls_onto_window();
stats_draw_usec += g_get_monotonic_time () - start;
++stats_draw_samples;
} else
draw_balls_onto_window();
return FALSE;
}
gboolean timeout (gpointer user_data) {
if (stats_sampling > 0) {
static guint64 elapsed_usec_total = 0;
static guint64 update_usec_total = 0;
static unsigned int samples = 0;
guint64 start = g_get_monotonic_time ();
update_state();
guint64 update_usec = g_get_monotonic_time () - start;
draw_balls_onto_window();
guint64 elapsed_usec = g_get_monotonic_time () - start;
++samples;
elapsed_usec_total += elapsed_usec;
update_usec_total += update_usec;
if (samples == stats_sampling) {
printf("\rupdate = %lu us, total = %lu us, load = %.0f%% (avg over %u samples) ",
update_usec_total / samples, elapsed_usec_total / samples,
(100.0*elapsed_usec_total / (1000000.0*samples*delta)), samples);
stats_update_usec += g_get_monotonic_time () - start;
if (++stats_update_samples == stats_sampling) {
float uavg = 1.0*stats_update_usec / stats_update_samples;
float davg = 1.0*stats_draw_usec / stats_draw_samples;
printf("\rupdate = %.0f us, draw = %.0f us, load = %.0f%% (%u update, %u draw) ",
uavg, davg, (uavg+davg)/(10000.0*delta),
stats_update_samples, stats_draw_samples);
fflush(stdout);
samples = 0;
elapsed_usec_total = 0;
update_usec_total = 0;
stats_update_usec = 0;
stats_update_samples = 0;
stats_draw_usec = 0;
stats_draw_samples = 0;
}
} else {
update_state();
draw_balls_onto_window();
}
gtk_widget_queue_draw(canvas);
return TRUE;
}
@ -781,7 +786,7 @@ int main (int argc, const char *argv[]) {
canvas = gtk_drawing_area_new ();
g_signal_connect (G_OBJECT (canvas), "configure-event", G_CALLBACK(configure_event), NULL);
g_signal_connect (G_OBJECT (canvas), "draw", G_CALLBACK (draw_event), NULL);
gtk_container_add (GTK_CONTAINER (window), canvas);
g_timeout_add (delta * 1000, timeout, canvas);