Add pause function

glslview.c

@@ -46,6 +46,7 @@
 #endif
 
 
+static bool paused = false;
 static float speed = 1.0;
 static unsigned previous_ticks = 0;
 
@@ -98,7 +99,10 @@ static void check_reload(void) {}
 
 static void update(void) {
 	unsigned ticks = SDL_GetTicks();
-	current_time += speed * (ticks - previous_ticks);
+
+	if (!paused)
+		current_time += speed * (ticks - previous_ticks);
+
 	previous_ticks = ticks;
 }
 
@@ -151,6 +155,10 @@ static void handle_input(const char *input) {
 		case '>':
 			if (speed < 0)
 				set_speed(-speed);
+			break;
+
+		case ' ':
+			paused = !paused;
 		}
 	}
 }