Method step

src/window/Window.cpp:424–541

void Window::step() {
	double frameTime = system::getTime();
	if (std::isfinite(internal->frameTime)) {
		internal->lastFrameDuration = frameTime - internal->frameTime;
	}
	internal->frameTime = frameTime;
	internal->fbCount = 0;
	// double t1 = 0.0, t2 = 0.0, t3 = 0.0, t4 = 0.0, t5 = 0.0;

	// Make event handlers and step() have a clean NanoVG context
	nvgReset(vg);

	bndSetFont(uiFont->handle);

	// Poll events
	// Save and restore context because event handler set their own context based on which window they originate from.
	Context* context = contextGet();
	glfwPollEvents();
	contextSet(context);

	// In case glfwPollEvents() sets another OpenGL context
	glfwMakeContextCurrent(win);

	// Call cursorPosCallback every frame, not just when the mouse moves
	{
		double xpos, ypos;
		glfwGetCursorPos(win, &xpos, &ypos);
		cursorPosCallback(win, xpos, ypos);
	}
	gamepad::step();

	// Set window title
	std::string windowTitle = APP_NAME + " " + APP_EDITION_NAME + " " + APP_VERSION;
	if (APP->patch->path != "") {
		windowTitle += " - ";
		if (!APP->history->isSaved())
			windowTitle += "*";
		windowTitle += system::getFilename(APP->patch->path);
	}
	if (windowTitle != internal->lastWindowTitle) {
		glfwSetWindowTitle(win, windowTitle.c_str());
		internal->lastWindowTitle = windowTitle;
	}

	// Get desired pixel ratio
	float newPixelRatio;
	if (settings::pixelRatio > 0.0) {
		newPixelRatio = settings::pixelRatio;
	}
	else {
		glfwGetWindowContentScale(win, &newPixelRatio, NULL);
		newPixelRatio = std::floor(newPixelRatio + 0.5);
	}
	if (newPixelRatio != pixelRatio) {
		pixelRatio = newPixelRatio;
		APP->event->handleDirty();
	}