Restart devices (resizing, etc. at runtime)

[-insane-]

With this code you can change resolution, bpp, fullscreen, etc. To change resolution and bpp, press Space and to quit this sample, press ESC and then Space. Hope it helps you.

Code: Select all

#include <irrlicht.h>

#pragma comment(lib, "Irrlicht.lib")

using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;

bool resize = false, stop = false;
int width = 640, height = 480, bpp = 16;

class Receiver : public IEventReceiver
{
protected:
	virtual bool OnEvent (const SEvent& event);
};

bool Receiver::OnEvent (const SEvent& event)
{
	if (event.EventType == EET_KEY_INPUT_EVENT)
	{
		if (event.KeyInput.Key == KEY_ESCAPE && event.KeyInput.PressedDown)
		{
			stop = true;
			return true;
		}
		else if (event.KeyInput.Key == KEY_SPACE && event.KeyInput.PressedDown)
		{
			width = 800, height = 600, bpp = 32;
			resize = true;
			return true;
		}
	}

	return false;
}

int main (void)
{
	Receiver* receiver = NULL;

	while (!stop)
	{
		IrrlichtDevice* device = createDevice (EDT_OPENGL, dimension2d<s32>(width, height), bpp, false, false, false, NULL);

		if (!device)
			return 0;

		IVideoDriver* driver = device->getVideoDriver();
		ISceneManager* smgr = device->getSceneManager();

		receiver = new Receiver;

		device->setEventReceiver(receiver);

		while (device->run() && !resize)
		{
			driver->beginScene(true, true, SColor(255,100,101,140));
			smgr->drawAll();
			driver->endScene();
		}

		resize = false;
		
		if (receiver)
		{
			delete receiver;
			receiver = NULL;
		}

		if (device)
		{
			device->closeDevice();
			device->run(); // Very important to do this here!
			device->drop();
		}
	}

	return 0;
}

Don't forget to reload all objects.

[cheshirekow]

A very nice, simple example of how to do this. Thank you.

[Halan]

But the scene and all the loaded data will be lost anyways or not?

[d3jake]

From what I"m reading (and it could just be that it's midnight where I"m sitting) the device is being created and dropped every frame?

[Brainsaw]

@Halan: yes, all Irrlicht data will be lost, so you have to think of your own way to store these information. Or don't give the user the option to change resolution during gameplay (that's how I did it in my current project).

[zerochen]

@d3jake
no there are two while loops