/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2013 Kahrl <kahrl@gmx.net>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "shader.h"
#include "irrlichttypes_extrabloated.h"
#include "debug.h"
#include "main.h" // for g_settings
#include "filesys.h"
#include "util/container.h"
#include "util/thread.h"
#include "settings.h"
#include <iterator>
#include <ICameraSceneNode.h>
#include <IGPUProgrammingServices.h>
#include <IMaterialRenderer.h>
#include <IMaterialRendererServices.h>
#include <IShaderConstantSetCallBack.h>
#include "EShaderTypes.h"
#include "log.h"
#include "gamedef.h"
#include "strfnd.h" // trim()
#include "tile.h"

/*
	A cache from shader name to shader path
*/
MutexedMap<std::string, std::string> g_shadername_to_path_cache;

/*
	Gets the path to a shader by first checking if the file
	  name_of_shader/filename
	exists in shader_path and if not, using the data path.

	If not found, returns "".

	Utilizes a thread-safe cache.
*/
std::string getShaderPath(const std::string &name_of_shader,
		const std::string &filename)
{
	std::string combined = name_of_shader + DIR_DELIM + filename;
	std::string fullpath = "";
	/*
		Check from cache
	*/
	bool incache = g_shadername_to_path_cache.get(combined, &fullpath);
	if(incache)
		return fullpath;

	/*
		Check from shader_path
	*/
	std::string shader_path = g_settings->get("shader_path");
	if(shader_path != "")
	{
		std::string testpath = shader_path + DIR_DELIM + combined;
		if(fs::PathExists(testpath))
			fullpath = testpath;
	}

	/*
		Check from default data directory
	*/
	if(fullpath == "")
	{
		std::string rel_path = std::string("client") + DIR_DELIM
				+ "shaders" + DIR_DELIM
				+ name_of_shader + DIR_DELIM
				+ filename;
		std::string testpath = porting::path_share + DIR_DELIM + rel_path;
		if(fs::PathExists(testpath))
			fullpath = testpath;
	}

	// Add to cache (also an empty result is cached)
	g_shadername_to_path_cache.set(combined, fullpath);

	// Finally return it
	return fullpath;
}

/*
	SourceShaderCache: A cache used for storing source shaders.
*/

class SourceShaderCache
{
public:
	void insert(const std::string &name_of_shader,
			const std::string &filename,
			const std::string &program,
			bool prefer_local)
	{
		std::string combined = name_of_shader + DIR_DELIM + filename;
		// Try to use local shader instead if asked to
		if(prefer_local){
			std::string path = getShaderPath(name_of_shader, filename);
			if(path != ""){
				std::string p = readFile(path);
				if(p != ""){
					m_programs[combined] = p;
					return;
				}
			}
		}
		m_programs[combined] = program;
	}
	std::string get(const std::string &name_of_shader,
			const std::string &filename)
	{
		std::string combined = name_of_shader + DIR_DELIM + filename;
		std::map<std::string, std::string>::iterator n;
		n = m_programs.find(combined);
		if(n != m_programs.end())
			return n->second;
		return "";
	}
	// Primarily fetches from cache, secondarily tries to read from filesystem
	std::string getOrLoad(const std::string &name_of_shader,
			const std::string &filename)
	{
		std::string combined = name_of_shader + DIR_DELIM + filename;
		std::map<std::string, std::string>::iterator n;
		n = m_programs.find(combined);
		if(n != m_programs.end())
			return n->second;
		std::string path = getShaderPath(name_of_shader, filename);
		if(path == ""){
			infostream<<"SourceShaderCache::getOrLoad(): No path found for \""
					<<combined<<"\""<<std::endl;
			return "";
		}
		infostream<<"SourceShaderCache::getOrLoad(): Loading path \""<<path
				<<"\""<<std::endl;
		std::string p = readFile(path);
		if(p != ""){
			m_programs[combined] = p;
			return p;
		}
		return "";
	}
private:
	std::map<std::string, std::string> m_programs;
	std::string readFile(const std::string &path)
	{
		std::ifstream is(path.c_str(), std::ios::binary);
		if(!is.is_open())
			return "";
		std::ostringstream tmp_os;
		tmp_os << is.rdbuf();
		return tmp_os.str();
	}
};

/*
	ShaderCallback: Sets constants that can be used in shaders
*/

class IShaderConstantSetterRegistry
{
public:
	virtual ~IShaderConstantSetterRegistry(){};
	virtual void onSetConstants(video::IMaterialRendererServices *services,
			bool is_highlevel, const std::string &name) = 0;
};

class ShaderCallback : public video::IShaderConstantSetCallBack
{
	IShaderConstantSetterRegistry *m_scsr;
	std::string m_name;

public:
	ShaderCallback(IShaderConstantSetterRegistry *scsr, const std::string &name):
		m_scsr(scsr),
		m_name(name)
	{}
	~ShaderCallback() {}

	virtual void OnSetConstants(video::IMaterialRendererServices *services, s32 userData)
	{
		video::IVideoDriver *driver = services->getVideoDriver();
		assert(driver);

		bool is_highlevel = userData;

		m_scsr->onSetConstants(services, is_highlevel, m_name);
	}
};

/*
	MainShaderConstantSetter: Set basic constants required for almost everything
*/

class MainShaderConstantSetter : public IShaderConstantSetter
{
public:
	MainShaderConstantSetter(IrrlichtDevice *device)
	{}
	~MainShaderConstantSetter() {}

	virtual void onSetConstants(video::IMaterialRendererServices *services,
			bool is_highlevel)
	{
		video::IVideoDriver *driver = services->getVideoDriver();
		assert(driver);

		// set inverted world matrix
		core::matrix4 invWorld = driver->getTransform(video::ETS_WORLD);
		invWorld.makeInverse();
		if(is_highlevel)
			services->setVertexShaderConstant("mInvWorld", invWorld.pointer(), 16);
		else
			services->setVertexShaderConstant(invWorld.pointer(), 0, 4);

		// set clip matrix
		core::matrix4 worldViewProj;
		worldViewProj = driver->getTransform(video::ETS_PROJECTION);
		worldViewProj *= driver->getTransform(video::ETS_VIEW);
		worldViewProj *= driver->getTransform(video::ETS_WORLD);
		if(is_highlevel)
			services->setVertexShaderConstant("mWorldViewProj", worldViewProj.pointer(), 16);
		else
			services->setVertexShaderConstant(worldViewProj.pointer(), 4, 4);

		// set transposed world matrix
		core::matrix4 transWorld = driver->getTransform(video::ETS_WORLD);
		transWorld = transWorld.getTransposed();
		if(is_highlevel)
			services->setVertexShaderConstant("mTransWorld", transWorld.pointer(), 16);
		else
			services->setVertexShaderConstant(transWorld.pointer(), 8, 4);

		// set world matrix
		core::matrix4 world = driver->getTransform(video::ETS_WORLD);
		if(is_highlevel)
			services->setVertexShaderConstant("mWorld", world.pointer(), 16);
		else
			services->setVertexShaderConstant(world.pointer(), 8, 4);

	}
};

/*
	ShaderSource
*/

class ShaderSource : public IWritableShaderSource, public IShaderConstantSetterRegistry
{
public:
	ShaderSource(IrrlichtDevice *device);
	~ShaderSource();

	/*
		- If shader material specified by name is found from cache,
		  return the cached id.
		- Otherwise generate the shader material, add to cache and return id.

		The id 0 points to a null shader. Its material is EMT_SOLID.
	*/
	u32 getShaderIdDirect(const std::string &name, 
		const u8 material_type, const u8 drawtype);

	/*
		If shader specified by the name pointed by the id doesn't
		exist, create it, then return id. 

		Can be called from any thread. If called from some other thread
		and not found in cache, the call is queued to the main thread
		for processing.
	*/
	
	u32 getShader(const std::string &name,
		const u8 material_type, const u8 drawtype);
	
	ShaderInfo getShaderInfo(u32 id);
	
	// Processes queued shader requests from other threads.
	// Shall be called from the main thread.
	void processQueue();

	// Insert a shader program into the cache without touching the
	// filesystem. Shall be called from the main thread.
	void insertSourceShader(const std::string &name_of_shader,
		const std::string &filename, const std::string &program);

	// Rebuild shaders from the current set of source shaders
	// Shall be called from the main thread.
	void rebuildShaders();

	void addGlobalConstantSetter(IShaderConstantSetter *setter)
	{
		m_global_setters.push_back(setter);
	}

	void onSetConstants(video::IMaterialRendererServices *services,
			bool is_highlevel, const std::string &name);

private:

	// The id of the thread that is allowed to use irrlicht directly
	threadid_t m_main<span class="hl com">/*</span>
<span class="hl com">Part of Minetest</span>
<span class="hl com">Copyright (C) 2013 celeron55, Perttu Ahola &lt;celeron55&#64;gmail.com&gt;</span>
<span class="hl com">Copyright (C) 2013 Ciaran Gultnieks &lt;ciaran&#64;ciarang.com&gt;</span>
<span class="hl com">Copyright (C) 2013 RealBadAngel, Maciej Kasatkin &lt;mk&#64;realbadangel.pl&gt;</span>
<span class="hl com"></span>
<span class="hl com">Permission to use, copy, modify, and distribute this software for any</span>
<span class="hl com">purpose with or without fee is hereby granted, provided that the above</span>
<span class="hl com">copyright notice and this permission notice appear in all copies.</span>
<span class="hl com"></span>
<span class="hl com">THE SOFTWARE IS PROVIDED &quot;AS IS&quot; AND THE AUTHOR DISCLAIMS ALL WARRANTIES</span>
<span class="hl com">WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF</span>
<span class="hl com">MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR</span>
<span class="hl com">ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES</span>
<span class="hl com">WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN</span>
<span class="hl com">ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF</span>
<span class="hl com">OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</span>
<span class="hl com">*/</span>

<span class="hl ppc">#include</span> <span class="hl pps">&quot;guiVolumeChange.h&quot;</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">&quot;debug.h&quot;</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">&quot;serialization.h&quot;</span><span class="hl ppc"></span>
<span class="hl ppc">#include &lt;string&gt;</span>
<span class="hl ppc">#include &lt;IGUICheckBox.h&gt;</span>
<span class="hl ppc">#include &lt;IGUIButton.h&gt;</span>
<span class="hl ppc">#include &lt;IGUIScrollBar.h&gt;</span>
<span class="hl ppc">#include &lt;IGUIStaticText.h&gt;</span>
<span class="hl ppc">#include &lt;IGUIFont.h&gt;</span>
<span class="hl ppc">#include</span> <span class="hl pps">&quot;main.h&quot;</span><span class="hl ppc"></span>
<span class="hl ppc">#include</span> <span class="hl pps">&quot;settings.h&quot;</span><span class="hl ppc"></span>

<span class="hl ppc">#include</span> <span class="hl pps">&quot;gettext.h&quot;</span><span class="hl ppc"></span>

<span class="hl kwb">const int</span> ID_soundText1 <span class="hl opt">=</span> <span class="hl num">263</span><span class="hl opt">;</span>
<span class="hl kwb">const int</span> ID_soundText2 <span class="hl opt">=</span> <span class="hl num">264</span><span class="hl opt">;</span>
<span class="hl kwb">const int</span> ID_soundExitButton <span class="hl opt">=</span> <span class="hl num">265</span><span class="hl opt">;</span>
<span class="hl kwb">const int</span> ID_soundSlider <span class="hl opt">=</span> <span class="hl num">266</span><span class="hl opt">;</span>

<span class="hl kwc">GUIVolumeChange</span><span class="hl opt">::</span><span class="hl kwd">GUIVolumeChange</span><span class="hl opt">(</span><span class="hl kwc">gui</span><span class="hl opt">::</span>IGUIEnvironment<span class="hl opt">*</span> env<span class="hl opt">,</span>
		<span class="hl kwc">gui</span><span class="hl opt">::</span>IGUIElement<span class="hl opt">*</span> parent<span class="hl opt">,</span> s32 id<span class="hl opt">,</span>
		IMenuManager <span class="hl opt">*</span>menumgr<span class="hl opt">,</span>
		Client<span class="hl opt">*</span> client
<span class="hl opt">):</span>
	<span class="hl kwd">GUIModalMenu</span><span class="hl opt">(</span>env<span class="hl opt">,</span> parent<span class="hl opt">,</span> id<span class="hl opt">,</span> menumgr<span class="hl opt">)</span>
<span class="hl opt">{</span>
<span class="hl opt">}</span>

<span class="hl kwc">GUIVolumeChange</span><span class="hl opt">::~</span><span class="hl kwd">GUIVolumeChange</span><span class="hl opt">()</span>
<span class="hl opt">{</span>
	<span class="hl kwd">removeChildren</span><span class="hl opt">();</span>
<span class="hl opt">}</span>

<span class="hl kwb">void</span> <span class="hl kwc">GUIVolumeChange</span><span class="hl opt">::</span><span class="hl kwd">removeChildren</span><span class="hl opt">()</span>
<span class="hl opt">{</span>
	<span class="hl opt">{</span>
		<span class="hl kwc">gui</span><span class="hl opt">::</span>IGUIElement <span class="hl opt">*</span>e <span class="hl opt">=</span> <span class="hl kwd">getElementFromId</span><span class="hl opt">(</span>ID_soundText1<span class="hl opt">);</span>
		<span class="hl kwa">if</span><span class="hl opt">(</span>e <span class="hl opt">!=</span> NULL<span class="hl opt">)</span>
			e<span class="hl opt">-&gt;</span><span class="hl kwd">remove</span><span class="hl opt">();</span>
	<span class="hl opt">}</span>
	<span class="hl opt">{</span>
		<span class="hl kwc">gui</span><span class="hl opt">::</span>IGUIElement <span class="hl opt">*</span>e <span class="hl opt">=</span> <span class="hl kwd">getElementFromId</span><span class="hl opt">(</span>ID_soundText2<span class="hl opt">);</span>
		<span class="hl kwa">if</span><span class="hl opt">(</span>e <span class="hl opt">!=</span> NULL<span class="hl opt">)</span>
			e<span class="hl opt">-&gt;</span><span class="hl kwd">remove</span><span class="hl opt">();</span>
	<span class="hl opt">}</span>
	<span class="hl opt">{</span>
		<span class="hl kwc">gui</span><span class="hl opt">::</span>IGUIElement <span class="hl opt">*</span>e <span class="hl opt">=</span> <span class="hl kwd">getElementFromId</span><span class="hl opt">(</span>ID_soundExitButton<span class="hl opt">);</span>
		<span class="hl kwa">if</span><span class="hl opt">(</span>e <span class="hl opt">!=</span> NULL<span class="hl opt">)</span>
			e<span class="hl opt">-&gt;</span><span class="hl kwd">remove</span><span class="hl opt">();</span>
	<span class="hl opt">}</span>
	<span class="hl opt">{</span>
		<span class="hl kwc">gui</span><span class="hl opt">::</span>IGUIElement <span class="hl opt">*</span>e <span class="hl opt">=</span> <span class="hl kwd">getElementFromId</span><span class="hl opt">(</span>ID_soundSlider<span class="hl opt">);</span>
		<span class="hl kwa">if</span><span class="hl opt">(</span>e <span class="hl opt">!=</span> NULL<span class="hl opt">)</span>
			e<span class="hl opt">-&gt;</span><span class="hl kwd">remove</span><span class="hl opt">();</span>
	<span class="hl opt">}</span>
<span class="hl opt">}</span>

<span class="hl kwb">void</span> <span class="hl kwc">GUIVolumeChange</span><span class="hl opt">::</span><span class="hl kwd">regenerateGui</span><span class="hl opt">(</span>v2u32 screensize<span class="hl opt">)</span>
<span class="hl opt">{</span>
	<span class="hl com">/*</span>
<span class="hl com">		Remove stuff</span>
<span class="hl com">	*/</span>
	<span class="hl kwd">removeChildren</span><span class="hl opt">();</span>
	
	<span class="hl com">/*</span>
<span class="hl com">		Calculate new sizes and positions</span>
<span class="hl com">	*/</span>
	<span class="hl kwc">core</span><span class="hl opt">::</span>rect<span class="hl opt">&lt;</span>s32<span class="hl opt">&gt;</span> <span class="hl kwd">rect</span><span class="hl opt">(</span>
			screensize<span class="hl opt">.</span>X<span class="hl opt">/</span><span class="hl num">2</span> <span class="hl opt">-</span> <span class="hl num">380</span><span class="hl opt">/</span><span class="hl num">2</span><span class="hl opt">,</span>
			screensize<span class="hl opt">.</span>Y<span class="hl opt">/</span><span class="hl num">2</span> <span class="hl opt">-</span> <span class="hl num">200</span><span class="hl opt">/</span><span class="hl num">2</span><span class="hl opt">,</span>
			screensize<span class="hl opt">.</span>X<span class="hl opt">/</span><span class="hl num">2</span> <span class="hl opt">+</span> <span class="hl num">380</span><span class="hl opt">/</span><span class="hl num">2</span><span class="hl opt">,</span>
			screensize<span class="hl opt">.</span>Y<span class="hl opt">/</span><span class="hl num">2</span> <span class="hl opt">+</span> <span class="hl num">200</span><span class="hl opt">/</span><span class="hl num">2</span>
	<span class="hl opt">);</span>
	
	DesiredRect <span class="hl opt">=</span> rect<span class="hl opt">;</span>
	<span class="hl kwd">recalculateAbsolutePosition</span><span class="hl opt">(</span><span class="hl kwa">false</span><span class="hl opt">);</span>

	v2s32 size <span class="hl opt">=</span> rect<span class="hl opt">.</span><span class="hl kwd">getSize</span><span class="hl opt">();</span>
	v2s32 <span class="hl kwd">topleft_client</span><span class="hl opt">(</span><span class="hl num">40</span><span class="hl opt">,</span> <span class="hl num">0</span><span class="hl opt">);</span>
	<span class="hl kwb">int</span> volume<span class="hl opt">=(</span><span class="hl kwb">int</span><span class="hl opt">)(</span>g_settings<span class="hl opt">-&gt;</span><span class="hl kwd">getFloat</span><span class="hl opt">(</span><span class="hl str">&quot;sound_volume&quot;</span><span class="hl opt">)*</span><span class="hl num">100</span><span class="hl opt">);</span>
	<span class="hl com">/*</span>
<span class="hl com">		Add stuff</span>
<span class="hl com">	*/</span>
	<span class="hl opt">{</span>
		<span class="hl kwc">core</span><span class="hl opt">::</span>rect<span class="hl opt">&lt;</span>s32<span class="hl opt">&gt;</span> <span class="hl kwd">rect</span><span class="hl opt">(</span><span class="hl num">0</span><span class="hl opt">,</span> <span class="hl num">0</span><span class="hl opt">,</span> <span class="hl num">120</span><span class="hl opt">,</span> <span class="hl num">20</span><span class="hl opt">);</span>
		rect <span class="hl opt">=</span> rect <span class="hl opt">+</span> <span class="hl kwd">v2s32</span><span class="hl opt">(</span>size<span class="hl opt">.</span>X<span class="hl opt">/</span><span class="hl num">2</span><span class="hl opt">-</span><span class="hl num">60</span><span class="hl opt">,</span> size<span class="hl opt">.</span>Y<span class="hl opt">/</span><span class="hl num">2</span><span class="hl opt">-</span><span class="hl num">35</span><span class="hl opt">);</span>
		<span class="hl kwb">wchar_t</span><span class="hl opt">*</span> text <span class="hl opt">=</span> <span class="hl kwd">wgettext</span><span class="hl opt">(</span><span class="hl str">&quot;Sound Volume: &quot;</span><span class="hl opt">);</span>
		Environment<span class="hl opt">-&gt;</span><span class="hl kwd">addStaticText</span><span class="hl opt">(</span>text<span class="hl opt">,</span> rect<span class="hl opt">,</span> <span class="hl kwa">false</span><span class="hl opt">,</span>
				<span class="hl kwa">true</span><span class="hl opt">,</span> <span class="hl kwa">this</span><span class="hl opt">,</span> ID_soundText1<span class="hl opt">);</span>
		<span class="hl kwa">delete</span><span class="hl opt">[]</span> text<span class="hl opt">;</span>
	<span class="hl opt">}</span>
	<span class="hl opt">{</span>
		<span class="hl kwc">core</span><span class="hl opt">::</span>rect<span class="hl opt">&lt;</span>s32<span class="hl opt">&gt;</span> <span class="hl kwd">rect</span><span class="hl opt">(</span><span class="hl num">0</span><span class="hl opt">,</span> <span class="hl num">0</span><span class="hl opt">,</span> <span class="hl num">30</span><span class="hl opt">,</span> <span class="hl num">20</span><span class="hl opt">);</span>
		rect <span class="hl opt">=</span> rect <span class="hl opt">+</span> <span class="hl kwd">v2s32</span><span class="hl opt">(</span>size<span class="hl opt">.</span>X<span class="hl opt">/</span><span class="hl num">2</span><span class="hl opt">+</span><span class="hl num">40</span><span class="hl opt">,</span> size<span class="hl opt">.</span>Y<span class="hl opt">/</span><span class="hl num">2</span><span class="hl opt">-</span><span class="hl num">35</span><span class="hl opt">);</span>
		Environment<span class="hl opt">-&gt;</span><span class="hl kwd">addStaticText</span><span class="hl opt">(</span><span class="hl kwc">core</span><span class="hl opt">::</span><span class="hl kwd">stringw</span><span class="hl opt">(</span>volume<span class="hl opt">).</span><span class="hl kwd">c_str</span><span class="hl opt">(),</span> rect<span class="hl opt">,</span> <span class="hl kwa">false</span><span class="hl opt">,</span>
				<span class="hl kwa">true</span><span class="hl opt">,</span> <span class="hl kwa">this</span><span class="hl opt">,</span> ID_soundText2<span class="hl opt">);</span>
	<span class="hl opt">}</span>
	<span class="hl opt">{</span>
		<span class="hl kwc">core</span><span class="hl opt">::</span>rect<span class="hl opt">&lt;</span>s32<span class="hl opt">&gt;</span> <span class="hl kwd">rect</span><span class="hl opt">(</span><span class="hl num">0</span><span class="hl opt">,</span> <span class="hl num">0</span><span class="hl opt">,</span> <span class="hl num">80</span><span class="hl opt">,</span> <span class="hl num">30</span><span class="hl opt">);</span>
		rect <span class="hl opt">=</span> rect <span class="hl opt">+</span> <span class="hl kwd">v2s32</span><span class="hl opt">(</span>size<span class="hl opt">.</span>X<span class="hl opt">/</span><span class="hl num">2</span><span class="hl opt">-</span><span class="hl num">80</span><span class="hl opt">/</span><span class="hl num">2</span><span class="hl opt">,</span> size<span class="hl opt">.</span>Y<span class="hl opt">/</span><span class="hl num">2</span><span class="hl opt">+</span><span class="hl num">55</span><span class="hl opt">);</span>
		<span class="hl kwb">wchar_t</span><span class="hl opt">*</span> text <span class="hl opt">=</span> <span class="hl kwd">wgettext</span><span class="hl opt">(</span><span class="hl str">&quot;Exit&quot;</span><span class="hl opt">);</span>
		Environment<span class="hl opt">-&gt;</span><span class="hl kwd">addButton</span><span class="hl opt">(</span>rect<span class="hl opt">,</span> <span class="hl kwa">this</span><span class="hl opt">,</span> ID_soundExitButton<span class="hl opt">,</span>
			text<span class="hl opt">);</span>
		<span class="hl kwa">delete</span><span class="hl opt">[]</span> text<span class="hl opt">;</span>
	<span class="hl opt">}</span>
	<span class="hl opt">{</span>
		<span class="hl kwc">core</span><span class="hl opt">::</span>rect<span class="hl opt">&lt;</span>s32<span class="hl opt">&gt;</span> <span class="hl kwd">rect</span><span class="hl opt">(</span><span class="hl num">0</span><span class="hl opt">,</span> <span class="hl num">0</span><span class="hl opt">,</span> <span class="hl num">300</span><span class="hl opt">,</span> <span class="hl num">20</span><span class="hl opt">);</span>
		rect <span class="hl opt">=</span> rect <span class="hl opt">+</span> <span class="hl kwd">v2s32</span><span class="hl opt">(</span>size<span class="hl opt">.</span>X<span class="hl opt">/</span><span class="hl num">2</span><span class="hl opt">-</span><span class="hl num">150</span><span class="hl opt">,</span> size<span class="hl opt">.</span>Y<span class="hl opt">/</span><span class="hl num">2</span><span class="hl opt">);</span>
		<span class="hl kwc">gui</span><span class="hl opt">::</span>IGUIScrollBar <span class="hl opt">*</span>e <span class="hl opt">=</span> Environment<span class="hl opt">-&gt;</span><span class="hl kwd">addScrollBar</span><span class="hl opt">(</span><span class="hl kwa">true</span><span class="hl opt">,</spa