// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010  Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#include "nel/misc/types_nl.h"

#include "nel/misc/event_emitter.h"
#include "nel/misc/event_listener.h"
#include "nel/misc/path.h"

// look at 3dinit example
#include "nel/3d/nelu.h"

// used for font management
#include "nel/3d/font_manager.h"
#include "nel/3d/computed_string.h"
#include "nel/3d/text_context.h"
#include "nel/3d/driver_user.h"

#ifndef FONT_DIR
#	define FONT_DIR "."
#endif

using namespace std;
using namespace NL3D;
using namespace NLMISC;


#ifdef NL_OS_WINDOWS
int WINAPI WinMain( HINSTANCE hInstance, 
									 HINSTANCE hPrevInstance, 
									 LPSTR lpCmdLine, 
									 int nCmdShow )
#else
int main(int argc, char **argv)
#endif
{
	// look at 3dinit example
	CNELU::init (800, 600, CViewport(), 32, true, 0, false, false); 

	NLMISC::CPath::addSearchPath(FONT_DIR);

	// create a font manager
	CFontManager fontManager;

	// set the font cache to 2 megabytes (default is 1mb)
	fontManager.setMaxMemory(2000000);

	CTextContext tc;

	tc.init (CNELU::Driver, &fontManager);

	// The first param is the font name (could be ttf, pfb, fon, etc...). The
	// second one is optional, it's the font kerning file
	tc.setFontGenerator (NLMISC::CPath::lookup("beteckna.ttf"));

	// create the first computed string.
	// A computed string is a string with a format and it generates the string
	// into a texture. First param is the string or ucstring (Unicode string).
	// Second is a pointer to a font generator. 3rd is the color of the font.
	// 4th is the size of the font. 5th is a pointer to the video driver.
	// 6th is the resulting computed string.
	CComputedString csRotation;
	fontManager.computeString ("cs Rotation", tc.getFontGenerator(), CRGBA(255,255,255), 70, CNELU::Driver, csRotation);

	CComputedString cs3d;
	fontManager.computeString ("cs 3d", tc.getFontGenerator(), CRGBA(255,127,0), 75, CNELU::Driver, cs3d);

	// generate an Unicode string.
	ucstring ucs("cs Unicode String");

	CComputedString csUnicode;
	fontManager.computeString (ucs, tc.getFontGenerator(), CRGBA(32,64,127), 75, CNELU::Driver, csUnicode);

	// look at event example
	CNELU::EventServer.addEmitter(CNELU::Driver->getEventEmitter());
	CNELU::AsyncListener.addToServer(CNELU::EventServer);

	do
	{
		// look at 3dinit example
		CNELU::clearBuffers(CRGBA(0,0,0));

		// now, every frame, we have to render the computer string.

		static float x=0, y=0, z=0;
		x+=0.01f; y+=0.1f, z+=0.001f;
		CMatrix m;
		m.identity();
		m.translate(CVector(0.7f*4.0f/3.0f, 0.5, 0.5));
		m.rotateX(x);
		m.rotateY(y);
		m.rotateZ(z);
		// display a string in 3d
		// first param is a pointer to the driver. second one is
		// the matrix transformation for the string
		cs3d.render3D (*CNELU::Driver, m);

		// the first param is a pointer to a driver. second one is the x position
		// (between (0.0 (left) and 1.0 (right)). third one is the y position (between
		// 0.0 (bottom) and 1.0 (top)).
		tc.setColor (CRGBA (255, 255, 255));
		tc.setFontSize (40);
		tc.setHotSpot (CComputedString::BottomLeft);
		tc.printAt (0.5f, 0.7f, string("printAt"));

		// the fourth param is the position of the hotspot, the text will be displayed at x,y
		// depending on the hotspot
		tc.setColor (CRGBA (0, 0, 255));
		tc.setFontSize (40);
		tc.setHotSpot (CComputedString::BottomLeft);
		tc.printAt (0.0f, 0.0f, string("NeL"));

		static float scale=1.0f, way=0.05f;
		scale+=way;
		if (scale>4 || scale < 1) way = -way;
		// the 5th and 6th params are the scale of the texture

		tc.setColor (CRGBA (200, 255, 64));
		tc.setFontSize (20);
		tc.setHotSpot (CComputedString::BottomLeft);
		tc.setScaleX (scale);
		tc.setScaleZ (scale);
		tc.printAt (0.1f, 0.3f, string("printAt Scale String"));
		
		// display the same string with no scale
		tc.setHotSpot (CComputedString::TopLeft);
		tc.setScaleX (1.0f);
		tc.setScaleZ (1.0f);
		tc.printAt (0.1f, 0.25f, string("printAt NoScale String"));

		// the 7th params is the rotation in radian
		static float angle=0.0f;
		angle+=0.01f;
		csRotation.render2D (*CNELU::Driver, 0.2f, 0.7f, CComputedString::MiddleMiddle, 1, 1, angle);

		csUnicode.render2D (*CNELU::Driver, 1.0f, 0.15f, CComputedString::MiddleRight);

		// display the Unicode string
		tc.setColor (CRGBA (32, 64, 127));
		tc.setFontSize (65);
		tc.setHotSpot (CComputedString::MiddleRight);
		tc.printAt (1.0f, 0.85f, ucstring("printAt Unicode String"));

		tc.setColor (CRGBA (255, 127, 0));
		tc.setFontSize (20);
		tc.setHotSpot (CComputedString::BottomRight);
		tc.printAt (0.99f, 0.01f, string("Press <ESC> to quit"));

		// look 3dinit example
		CNELU::swapBuffers();
		CNELU::screenshot();

		// look at event example
		CNELU::EventServer.pump(true);
	}
	while(!CNELU::AsyncListener.isKeyPushed(KeyESCAPE));

	fontManager.dumpCache ("font_cache_dump.tga");

	// look at event example
	CNELU::AsyncListener.removeFromServer(CNELU::EventServer);

	// look at 3dinit example
	CNELU::release();

	return EXIT_SUCCESS;
}