Method Init

src/transition.cpp:73–120

}

void Transition::Init(Type type, Scene *linked_scene, int duration, bool next_erase) {
	// Triggering multiple transitions on a single frame is a bug.
	assert(!IsActive());

	if (duration < 0) {
		duration = GetDefaultFrames(type);
	}
	transition_type = type;
	scene = linked_scene;

	current_frame = 0;
	flash = {};
	flash_power = 0;
	flash_iterations = 0;
	flash_duration = 0;
	total_frames = 0;
	from_erase = to_erase;

	SetVisible(false);

	// Erase transitions are skipped entirely if screen already erased.
	if (type != TransitionNone && from_erase && next_erase) {
		transition_type = TransitionNone;
		return;
	}

	screen1.reset();
	screen2.reset();

	// Show Screen, the current frame is captured immediately
	if (!next_erase) {
		screen1 = DisplayUi->CaptureScreen();
	}

	// Total frames and erased have to be set *after* the above drawing code.
	// Otherwise IsActive() / IsErasedNotActive() will mess up drawing.
	total_frames = duration;

	// TransitionNone is neither a Show or Erase, it just waits and does nothing.
	// Screen state is not changed.
	if (type == TransitionNone) {
		return;
	}

	to_erase = next_erase;

	SetAttributesTransitions();
}

void Transition::SetAttributesTransitions() {
	int w, h, beg_i, mid_i, end_i, length;