diff --git a/Makefile b/Makefile
index 35bc677..794368c 100644
--- a/Makefile
+++ b/Makefile
@@ -13,6 +13,8 @@ DEMO = \
 	 main.cc \
 	 imgui_impl_sdl.cc \
 	 \
+	 filewatcher.cc \
+	 window.cc \
 	 utilities.cc \
 	 texture.cc \
 	 rendertarget.cc \
@@ -20,6 +22,7 @@ DEMO = \
 	 shaders.cc \
 	 camera.cc \
 	 demo.cc \
+	 globals.cc \
 	 \
 	 raymarcher.cc \
 	 \
diff --git a/bloom.cc b/bloom.cc
index ee24bac..387361f 100644
--- a/bloom.cc
+++ b/bloom.cc
@@ -1,6 +1,7 @@
 #include "externals.hh"
 #include "bloom.hh"
 #include "profiling.hh"
+#include "globals.hh"
 
 namespace {
 	static const std::string Name_( "BLOOOOM!" );
@@ -11,12 +12,11 @@ namespace {
 
 
 T_BloomPass::T_BloomPass(
-		__rw__ T_FilesWatcher& watcher ,
 		__rw__ T_Texture& input )
 	: input_( input ) ,
-		spHighpass_( GL_FRAGMENT_SHADER , watcher ) ,
-		spDownsample_( GL_FRAGMENT_SHADER , watcher ) ,
-		spBlur_( GL_FRAGMENT_SHADER , watcher ) ,
+		spHighpass_( GL_FRAGMENT_SHADER ) ,
+		spDownsample_( GL_FRAGMENT_SHADER ) ,
+		spBlur_( GL_FRAGMENT_SHADER ) ,
 		//
 		txBlur0_( input.width( ) , input.height( ) , E_TexType::RGB16F , BloomLevels ) ,
 		txBlur1_( input.width( ) , input.height( ) , E_TexType::RGB16F , BloomLevels ) ,
@@ -46,7 +46,7 @@ void T_BloomPass::render( )
 {
 	PSTART( );
 
-	auto& tm( T_TextureManagement::TM( ) );
+	auto& tm( Globals::Textures( ) );
 	if ( spHighpass_.activate( ) && rtBlur0_[ 0 ].activate( ) ) {
 		enum {
 			U_TEXTURE		= 0 ,
diff --git a/bloom.hh b/bloom.hh
index 7f8465d..dfadf11 100644
--- a/bloom.hh
+++ b/bloom.hh
@@ -15,8 +15,7 @@ struct T_BloomPass
 	T_BloomPass( T_BloomPass const& ) = delete;
 	T_BloomPass( T_BloomPass&& ) = delete;
 
-	T_BloomPass( __rw__ T_FilesWatcher& watcher ,
-			__rw__ T_Texture& input );
+	T_BloomPass( __rw__ T_Texture& input );
 
 	void render( );
 	void makeUI( );
diff --git a/combine.cc b/combine.cc
index bc39761..60c39e4 100644
--- a/combine.cc
+++ b/combine.cc
@@ -2,6 +2,7 @@
 #include "combine.hh"
 #include "bloom.hh"
 #include "profiling.hh"
+#include "globals.hh"
 
 namespace {
 	static const std::string Name_( "Combine" );
@@ -12,11 +13,10 @@ namespace {
 
 
 T_CombinePass::T_CombinePass(
-		__rw__ T_FilesWatcher& watcher ,
 		__rw__ T_Texture& image ,
 		__rw__ T_Texture& bloom )
 	: txImage_( image ) , txBloom_( bloom ) ,
-		program_( GL_FRAGMENT_SHADER , watcher ) ,
+		program_( GL_FRAGMENT_SHADER ) ,
 		bloomStrength_( 0.45 ) ,
 		bloomAttenuation_( 0.3 )
 {
@@ -31,7 +31,7 @@ void T_CombinePass::render( )
 	glClearColor( 1 , 0 , 1 , 1 );
 	glClear( GL_COLOR_BUFFER_BIT );
 	if ( program_.activate( ) ) {
-		auto& tm( T_TextureManagement::TM( ) );
+		auto& tm( Globals::Textures( ) );
 		tm.bind( 0 , txImage_ );
 		tm.bind( 1 , txBloom_ );
 		glUniform1i( 0 , 0 );
diff --git a/combine.hh b/combine.hh
index 825e9bd..6406b31 100644
--- a/combine.hh
+++ b/combine.hh
@@ -10,8 +10,7 @@ struct T_CombinePass
 	T_CombinePass( T_CombinePass const& ) = delete;
 	T_CombinePass( T_CombinePass&& ) = delete;
 
-	T_CombinePass( __rw__ T_FilesWatcher& watcher ,
-			__rw__ T_Texture& image ,
+	T_CombinePass( __rw__ T_Texture& image ,
 			__rw__ T_Texture& bloom );
 
 	void render( );
diff --git a/demo.cc b/demo.cc
index 8f901ba..329a52a 100644
--- a/demo.cc
+++ b/demo.cc
@@ -2,22 +2,21 @@
 #include "demo.hh"
 
 
-T_Demo::T_Demo( __rw__ T_FilesWatcher& watcher ,
-		__rd__ const uint32_t width ,
+T_Demo::T_Demo( __rd__ const uint32_t width ,
 		__rd__ const uint32_t height )
-	: watcher( watcher ) , width( width ) , height( height )
+	: width( width ) , height( height )
 { }
 
 
 bool T_Demo::initialise( )
 {
 	raymarcher = std::make_unique< T_Raymarcher >(
-			watcher , width , height );
-	dof = std::make_unique< T_DoFPass >( watcher ,
+			width , height );
+	dof = std::make_unique< T_DoFPass >(
 			raymarcher->output( ) , raymarcher->depth( ) );
-	bloom = std::make_unique< T_BloomPass >( watcher ,
+	bloom = std::make_unique< T_BloomPass >(
 			raymarcher->output( ) );
-	combine = std::make_unique< T_CombinePass >( watcher ,
+	combine = std::make_unique< T_CombinePass >(
 			dof->output( ) , bloom->output( ) );
 	return true;
 }
diff --git a/demo.hh b/demo.hh
index 03bb471..b646c56 100644
--- a/demo.hh
+++ b/demo.hh
@@ -15,8 +15,7 @@ struct T_Demo
 
 	// ---------------------------------------------------------------------
 
-	T_Demo( __rw__ T_FilesWatcher& watcher ,
-			__rd__ const uint32_t width ,
+	T_Demo( __rd__ const uint32_t width ,
 			__rd__ const uint32_t height );
 
 	bool initialise( );
@@ -37,7 +36,6 @@ struct T_Demo
 
 	// ---------------------------------------------------------------------
 
-	T_FilesWatcher& watcher;
 	const uint32_t width;
 	const uint32_t height;
 
diff --git a/dof.cc b/dof.cc
index 416027b..d0f2db5 100644
--- a/dof.cc
+++ b/dof.cc
@@ -1,6 +1,7 @@
 #include "externals.hh"
 #include "dof.hh"
 #include "profiling.hh"
+#include "globals.hh"
 
 namespace {
 	static const std::string Name_( "DoF" );
@@ -11,12 +12,11 @@ namespace {
 
 
 T_DoFPass::T_DoFPass(
-		__rw__ T_FilesWatcher& watcher ,
 		__rw__ T_Texture& imageInput ,
 		__rw__ T_Texture& depthInput )
 	: imageInput_( imageInput ) , depthInput_( depthInput ) ,
-		spPass1_( GL_FRAGMENT_SHADER , watcher ) ,
-		spPass2_( GL_FRAGMENT_SHADER , watcher ) ,
+		spPass1_( GL_FRAGMENT_SHADER ) ,
+		spPass2_( GL_FRAGMENT_SHADER ) ,
 		txPass1_( imageInput.width( ) , imageInput.height( ) ,
 				E_TexType::RGB16F ) ,
 		txOutput_( imageInput.width( ) , imageInput.height( ) ,
@@ -48,7 +48,7 @@ void T_DoFPass::render( )
 		U_RES_TIME	= 4
 	};
 
-	auto& tm( T_TextureManagement::TM( ) );
+	auto& tm( Globals::Textures( ) );
 	if ( spPass1_.activate( ) && rtPass1_.activate( ) ) {
 		glUniform1i( U_INPUT , 0 );
 		glUniform1i( U_DEPTH , 1 );
diff --git a/dof.hh b/dof.hh
index fec5e32..37a5219 100644
--- a/dof.hh
+++ b/dof.hh
@@ -9,8 +9,7 @@ struct T_DoFPass
 	T_DoFPass( T_DoFPass const& ) = delete;
 	T_DoFPass( T_DoFPass&& ) = delete;
 
-	T_DoFPass( __rw__ T_FilesWatcher& watcher ,
-			__rw__ T_Texture& imageInput ,
+	T_DoFPass( __rw__ T_Texture& imageInput ,
 			__rw__ T_Texture& depthInput );
 
 	void render( );
diff --git a/filewatcher.cc b/filewatcher.cc
new file mode 100644
index 0000000..b76d92e
--- /dev/null
+++ b/filewatcher.cc
@@ -0,0 +1,120 @@
+#include "externals.hh"
+#include "filewatcher.hh"
+#include "utilities.hh"
+
+
+/*= T_FilesWatcher ===========================================================*/
+
+T_FilesWatcher::T_FilesWatcher( )
+	: fd( inotify_init1( O_NONBLOCK ) )
+{ }
+
+T_FilesWatcher::T_FilesWatcher( T_FilesWatcher&& other ) noexcept
+	: fd( 0 ) , watched( std::move( other.watched ) )
+{
+	std::swap( fd , other.fd );
+	other.watched.clear( );
+	for ( T_WatchedFiles* wf : watched ) {
+		if ( wf ) {
+			wf->watcher = this;
+		}
+	}
+}
+
+T_FilesWatcher::~T_FilesWatcher( )
+{
+	if ( fd ) {
+		close( fd );
+	}
+	for ( T_WatchedFiles* wf : watched ) {
+		if ( wf ) {
+			wf->watcher = nullptr;
+		}
+	}
+}
+
+void T_FilesWatcher::check( )
+{
+	for ( T_WatchedFiles* wf : watched ) {
+		if ( wf ) {
+			wf->triggered = false;
+		}
+	}
+
+	inotify_event ie;
+	while ( read( fd , &ie , sizeof( ie ) ) == sizeof( ie ) ) {
+		if ( ( ie.mask & ( IN_CLOSE_WRITE | IN_DELETE_SELF ) ) == 0 ) {
+			continue;
+		}
+
+		for ( T_WatchedFiles* wf : watched ) {
+			if ( !wf || wf->triggered ) {
+				continue;
+			}
+			auto const& idl( wf->identifiers );
+			if ( find( idl , ie.wd ) != idl.end( ) ) {
+				wf->triggered = true;
+				wf->callback( );
+			}
+		}
+	}
+}
+
+/*= T_WatchedFiles ===========================================================*/
+
+T_WatchedFiles::T_WatchedFiles( T_WatchedFiles&& other ) noexcept
+	: watcher( other.watcher ) , callback( other.callback ) ,
+		triggered( other.triggered ) ,
+		identifiers( std::move( other.identifiers ) )
+{
+	if ( watcher ) {
+		other.watcher = nullptr;
+		*( find( watcher->watched , &other ) ) = this;
+	}
+}
+
+T_WatchedFiles::T_WatchedFiles(
+		__rw__	T_FilesWatcher& watcher ,
+		__rd__	const F_OnFileChanges callback )
+	: watcher( &watcher ) , callback( callback ) , triggered( false )
+{
+	watcher.watched.push_back( this );
+}
+
+T_WatchedFiles::~T_WatchedFiles( )
+{
+	clear( );
+	if ( watcher ) {
+		watcher->watched.erase( find( watcher->watched , this ) );
+	}
+}
+
+void T_WatchedFiles::clear( )
+{
+	if ( watcher ) {
+		const auto fd( watcher->fd );
+		for ( int wd : identifiers ) {
+			inotify_rm_watch( fd , wd );
+		}
+	}
+	identifiers.clear( );
+}
+
+bool T_WatchedFiles::watch(
+		__rd__	std::string const& file )
+{
+	static constexpr auto inFlags( IN_CLOSE_WRITE | IN_DELETE_SELF );
+	if ( watcher ) {
+		const auto wd( inotify_add_watch( watcher->fd ,
+					file.c_str( ) , inFlags ) );
+		if ( wd == -1 ) {
+			return false;
+		}
+		if ( find( identifiers , wd ) == identifiers.end( ) ) {
+			identifiers.push_back( wd );
+		}
+		return true;
+	}
+	return false;
+}
+
diff --git a/filewatcher.hh b/filewatcher.hh
new file mode 100644
index 0000000..51b4219
--- /dev/null
+++ b/filewatcher.hh
@@ -0,0 +1,55 @@
+#pragma once
+#ifndef REAL_BUILD
+# include "externals.hh"
+#endif
+
+
+/*= T_FilesWatcher / T_WatchedFiles ==========================================*/
+
+struct T_FilesWatcher;
+struct T_WatchedFiles;
+using F_OnFileChanges = std::function< void( void ) >;
+
+struct T_FilesWatcher
+{
+	friend struct T_WatchedFiles;
+
+	T_FilesWatcher( T_FilesWatcher const& ) = delete;
+
+	T_FilesWatcher( );
+	T_FilesWatcher( T_FilesWatcher&& ) noexcept;
+	~T_FilesWatcher( );
+
+	void check( );
+
+    private:
+	int fd;
+	std::vector< T_WatchedFiles* > watched;
+};
+
+/*----------------------------------------------------------------------------*/
+
+struct T_WatchedFiles
+{
+	friend struct T_FilesWatcher;
+
+	T_WatchedFiles( ) = delete;
+	T_WatchedFiles( T_WatchedFiles const& ) = delete;
+
+	T_WatchedFiles( T_WatchedFiles&& ) noexcept;
+	T_WatchedFiles(
+			__rw__ T_FilesWatcher& watcher ,
+			__rd__ const F_OnFileChanges callback );
+
+	~T_WatchedFiles( );
+
+	void clear( );
+	bool watch( __rd__ std::string const& file );
+
+    private:
+	T_FilesWatcher* watcher;
+	const F_OnFileChanges callback;
+	bool triggered;
+	std::vector< int > identifiers;
+};
+
diff --git a/globals.cc b/globals.cc
new file mode 100644
index 0000000..172e455
--- /dev/null
+++ b/globals.cc
@@ -0,0 +1,34 @@
+#include "externals.hh"
+#include "globals.hh"
+
+#include "filewatcher.hh"
+#include "profiling.hh"
+#include "texture.hh"
+#include "shaders.hh"
+#include "window.hh"
+
+
+std::unique_ptr< T_FilesWatcher > Globals::watcher_;
+std::unique_ptr< T_Window > Globals::window_;
+std::unique_ptr< T_Profiler > Globals::profiler_;
+std::unique_ptr< T_TextureManager > Globals::textures_;
+std::unique_ptr< T_ShaderManager > Globals::shaders_;
+
+
+void Globals::Init( )
+{
+	watcher_ = std::make_unique< T_FilesWatcher >( );
+	window_ = std::make_unique< T_Window >( );
+	profiler_ = std::make_unique< T_Profiler >( );
+	textures_ = std::make_unique< T_TextureManager >( );
+	shaders_ = std::make_unique< T_ShaderManager >( );
+}
+
+void Globals::Shutdown( )
+{
+	shaders_.reset( );
+	textures_.reset( );
+	profiler_.reset( );
+	window_.reset( );
+	watcher_.reset( );
+}
diff --git a/globals.hh b/globals.hh
new file mode 100644
index 0000000..19f516a
--- /dev/null
+++ b/globals.hh
@@ -0,0 +1,31 @@
+#pragma once
+#ifndef REAL_BUILD
+# include "externals.hh"
+#endif
+
+
+struct T_Window;
+struct T_FilesWatcher;
+struct T_Profiler;
+struct T_TextureManager;
+struct T_ShaderManager;
+
+
+struct Globals
+{
+	static void Init( );
+	static void Shutdown( );
+
+	static T_FilesWatcher& Watcher( )	{ return *watcher_; }
+	static T_Window& Window( )		{ return *window_; }
+	static T_Profiler& Profiler( )		{ return *profiler_; }
+	static T_TextureManager& Textures( )	{ return *textures_; }
+	static T_ShaderManager& Shaders( )	{ return *shaders_; }
+
+    private:
+	static std::unique_ptr< T_FilesWatcher > watcher_;
+	static std::unique_ptr< T_Window > window_;
+	static std::unique_ptr< T_Profiler > profiler_;
+	static std::unique_ptr< T_ShaderManager > shaders_;
+	static std::unique_ptr< T_TextureManager > textures_;
+};
diff --git a/main.cc b/main.cc
index 822c102..51ff500 100644
--- a/main.cc
+++ b/main.cc
@@ -2,7 +2,11 @@
 
 #include "imgui_impl_sdl.h"
 #include "demo.hh"
+#include "globals.hh"
 #include "profiling.hh"
+#include "window.hh"
+#include "shaders.hh"
+// FIXME ^^
 
 
 /*= T_Main ===================================================================*/
@@ -15,16 +19,11 @@ struct T_Main
 	void mainLoop( );
 
     private:
-	const std::string projectFile;
-	SDL_Window * window;
-	SDL_GLContext gl;
-
 	bool done = false;
 	bool capture = false;
 	ImVec2 mouseInitial;
 	ImVec2 mouseMove;
 
-	T_FilesWatcher watcher;
 	std::unique_ptr< T_ShaderProgram > spCopy;
 
 	std::unique_ptr< T_Demo > demo;
@@ -43,30 +42,13 @@ struct T_Main
 
 T_Main::T_Main( )
 {
-	SDL_Init( SDL_INIT_VIDEO | SDL_INIT_TIMER );
-
-	// Setup window
-	SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER , 1 );
-	SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE , 24 );
-	SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE , 8 );
-	SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION , 2 );
-	SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION , 2 );
-	SDL_DisplayMode current;
-	SDL_GetCurrentDisplayMode( 0 , &current );
-	window = SDL_CreateWindow( "DEMO",
-			SDL_WINDOWPOS_CENTERED , SDL_WINDOWPOS_CENTERED ,
-			1280 , 720 ,
-			SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE );
-	gl = SDL_GL_CreateContext( window );
-	glewInit();
-	ImGui_ImplSdl_Init( window );
-
+	Globals::Init( );
 	initProgram( );
 }
 
 void T_Main::mainLoop( )
 {
-	auto& p( T_Profiler::Profiler );
+	auto& p( Globals::Profiler( ) );
 	while ( !done ) {
 		if ( demo ) {
 			auto const& dspSize( ImGui::GetIO( ).DisplaySize );
@@ -80,15 +62,15 @@ void T_Main::mainLoop( )
 
 		glFinish( );
 		p.startFrame( );
-		T_Profiler::Profiler.start( "Full frame" );
+		p.start( "Full frame" );
 		startIteration( );
 		if ( !done ) {
 			handleCapture( );
 			makeUI( );
-			watcher.check( );
 			render( );
-			T_Profiler::Profiler.end( "Full frame" );
-			SDL_GL_SwapWindow( window );
+			p.end( "Full frame" );
+			Globals::Window( ).swap( );
+			Globals::Watcher( ).check( );
 			p.endFrame( );
 		}
 	}
@@ -97,11 +79,7 @@ void T_Main::mainLoop( )
 T_Main::~T_Main( )
 {
 	demo.reset( );
-	T_TextureManagement::Shutdown( );
-	ImGui_ImplSdl_Shutdown( );
-	SDL_GL_DeleteContext( gl );
-	SDL_DestroyWindow( window );
-	SDL_Quit( );
+	Globals::Shutdown( );
 }
 
 /*----------------------------------------------------------------------------*/
@@ -115,9 +93,9 @@ void T_Main::initDemo( )
 	}
 
 	printf( "init w/ dspsize %dx%d\n" , int( dspSize.x ) , int( dspSize.y ) );
-	demo = std::make_unique< T_Demo >( watcher , dspSize.x , dspSize.y );
+	demo = std::make_unique< T_Demo >( dspSize.x , dspSize.y );
 	if ( demo->initialise( ) ) {
-		T_Profiler::Profiler.clear( );
+		Globals::Profiler( ).clear( );
 	} else {
 		demo.reset( );
 	}
@@ -140,7 +118,7 @@ void T_Main::startIteration( )
 		}
 	}
 
-	ImGui_ImplSdl_NewFrame( window , capture , mouseInitial );
+	Globals::Window( ).startFrame( capture , mouseInitial );
 	ImGui::GetIO( ).MouseDrawCursor = true;
 }
 
@@ -159,9 +137,7 @@ void T_Main::handleCapture( )
 		capture = false;
 		ImGui::CaptureMouseFromApp( false );
 		SDL_SetRelativeMouseMode( SDL_FALSE );
-		SDL_WarpMouseInWindow( window ,
-				int( mouseInitial.x ) ,
-				int( mouseInitial.y ) );
+		Globals::Window( ).warpMouse( mouseInitial );
 		ImGui::SetMouseCursor( ImGuiMouseCursor_Arrow );
 	} else if ( capture ) {
 		ImGui::SetMouseCursor( ImGuiMouseCursor_Move );
@@ -188,31 +164,31 @@ void T_Main::makeUI( )
 			ImGuiSetCond_Once );
 	ImGui::SetNextWindowPos( ImVec2( ) , ImGuiSetCond_Once );
 	ImGui::Begin( "Yay! Demo!" );
-	ImGui::Checkbox( "Profiler" , &T_Profiler::Profiler.uiEnabled( ) );
+	ImGui::Checkbox( "Profiler" , &Globals::Profiler( ).uiEnabled( ) );
 	if ( demo ) {
 		demo->makeUI( );
 	}
 	ImGui::End( );
 
-	T_Profiler::Profiler.makeUI( );
+	Globals::Profiler( ).makeUI( );
 }
 
 void T_Main::render( )
 {
 	if ( demo ) {
-		T_Profiler::Profiler.start( "Render" );
+		Globals::Profiler( ).start( "Render" );
 		demo->render( );
-		glFinish( ); T_Profiler::Profiler.end( "Render" );
+		glFinish( ); Globals::Profiler( ).end( "Render" );
 	}
 	glUseProgram( 0 );
-	T_TextureManagement::TM( ).reset( );
+	Globals::Textures( ).reset( );
 	ImGui::Render( );
 }
 
 
 void T_Main::initProgram( )
 {
-	spCopy = std::make_unique< T_ShaderProgram >( GL_FRAGMENT_SHADER , watcher );
+	spCopy = std::make_unique< T_ShaderProgram >( GL_FRAGMENT_SHADER );
 	spCopy->addFile( "copy.glsl" );
 	spCopy->load( );
 }
@@ -223,20 +199,10 @@ void T_Main::initProgram( )
 int main( int , char** )
 {
 	T_Main m;
+#if 0
+	testLoadShaderFile( );
+#else
 	m.mainLoop( );
-
-#if 0
-	// Frame time history
-	const int nFrameTimes = 200;
-	float frameTimes[ nFrameTimes ];
-	memset( frameTimes , 0 , sizeof( float ) * nFrameTimes );
 #endif
-#if 0
-		// Update frame time history
-		memmove( frameTimes , &frameTimes[ 1 ] ,
-				( nFrameTimes - 1 ) * sizeof( float ) );
-		frameTimes[ nFrameTimes - 1 ] = 1000.0f / ImGui::GetIO( ).Framerate;
-#endif
-
 	return 0;
 }
diff --git a/programs.cc b/programs.cc
index 8a65fd5..ce91d82 100644
--- a/programs.cc
+++ b/programs.cc
@@ -1,5 +1,6 @@
 #include "externals.hh"
 #include "programs.hh"
+#include "globals.hh"
 
 
 /*= T_ShaderCode =============================================================*/
@@ -144,9 +145,8 @@ GLuint T_ShaderCode::createProgram(
 /*= T_ShaderProgram ==========================================================*/
 
 T_ShaderProgram::T_ShaderProgram(
-		__rd__ const GLenum programType ,
-		__rw__ T_FilesWatcher& watcher )
-	: files_( watcher , [this] { load( ); } ) ,
+		__rd__ const GLenum programType )
+	: files_( Globals::Watcher( ) , [this] { load( ); } ) ,
 		programType_( programType ) , program_( 0 )
 {
 }
@@ -245,12 +245,11 @@ namespace {
 	std::unique_ptr< T_ShaderProgram > FsQuad_;
 }
 
-T_ShaderProgram const& T_ShaderProgram::FullscreenQuad(
-		__rw__ T_FilesWatcher& watcher )
+T_ShaderProgram const& T_ShaderProgram::FullscreenQuad( )
 {
 	if ( !FsQuad_ ) {
 		FsQuad_ = std::make_unique< T_ShaderProgram >(
-				GL_VERTEX_SHADER , watcher );
+				GL_VERTEX_SHADER );
 		FsQuad_->addFile( "fsquad.glsl" );
 		FsQuad_->load( );
 	}
diff --git a/programs.hh b/programs.hh
index c6636d3..99981b6 100644
--- a/programs.hh
+++ b/programs.hh
@@ -1,6 +1,6 @@
 #pragma once
 
-#include "utilities.hh"
+#include "filewatcher.hh"
 
 
 /*= T_ShaderCode =============================================================*/
@@ -40,9 +40,7 @@ struct T_ShaderProgram
 	T_ShaderProgram( T_ShaderProgram const& ) = delete;
 	T_ShaderProgram( T_ShaderProgram&& ) = delete;
 
-	T_ShaderProgram(
-			__rd__ GLenum programType ,
-			__rw__ T_FilesWatcher& watcher );
+	T_ShaderProgram( __rd__ GLenum programType );
 	~T_ShaderProgram( );
 
 	void addChunk( __rd__ std::string const& string );
@@ -53,8 +51,7 @@ struct T_ShaderProgram
 
 	GLuint id( ) const { return program_; }
 
-	static T_ShaderProgram const& FullscreenQuad(
-			__rw__ T_FilesWatcher& watcher );
+	static T_ShaderProgram const& FullscreenQuad( );
 
     private:
 	T_WatchedFiles files_;
diff --git a/raymarcher.cc b/raymarcher.cc
index 641f201..ef86630 100644
--- a/raymarcher.cc
+++ b/raymarcher.cc
@@ -12,10 +12,9 @@ namespace {
 
 
 T_Raymarcher::T_Raymarcher(
-		__rw__ T_FilesWatcher& watcher ,
 		__rd__ const uint32_t width ,
 		__rd__ const uint32_t height )
-	: camera_( ) , program_( GL_FRAGMENT_SHADER , watcher ) ,
+	: camera_( ) , program_( GL_FRAGMENT_SHADER ) ,
 		txOutput_( width , height , E_TexType::RGB16F ) ,
 		txDepth_( width , height , E_TexType::R16F ) ,
 		rtOutput_( T_RendertargetSetup( )
diff --git a/raymarcher.hh b/raymarcher.hh
index 3aff311..57b7d3a 100644
--- a/raymarcher.hh
+++ b/raymarcher.hh
@@ -12,8 +12,7 @@ struct T_Raymarcher
 	T_Raymarcher( T_Raymarcher const& ) = delete;
 	T_Raymarcher( T_Raymarcher&& ) = delete;
 
-	T_Raymarcher( __rw__ T_FilesWatcher& watcher ,
-			__rd__ const uint32_t width ,
+	T_Raymarcher( __rd__ const uint32_t width ,
 			__rd__ const uint32_t height );
 
 	void render( );
diff --git a/shaders.cc b/shaders.cc
index 414958c..05d4a81 100644
--- a/shaders.cc
+++ b/shaders.cc
@@ -1,5 +1,6 @@
 #include "externals.hh"
 #include "shaders.hh"
+#include "globals.hh"
 
 
 namespace {
@@ -14,6 +15,8 @@ const std::map< std::string , E_ShaderInput > InputTypes_( ([] {
 	t.emplace( "vertex" , E_ShaderInput::VERTEX );
 	t.emplace( "fragment" , E_ShaderInput::FRAGMENT );
 	t.emplace( "compute" , E_ShaderInput::COMPUTE );
+	t.emplace( "geo" , E_ShaderInput::GEOMETRY );
+	t.emplace( "geometry" , E_ShaderInput::GEOMETRY );
 	return t;
 })());
 
@@ -313,34 +316,62 @@ void T_CodeBuilder_::next( )
 
 /*============================================================================*/
 
+T_ShaderCodeLoader::T_ShaderCodeLoader(
+		__rw__ T_FilesWatcher& watcher )
+	: watcher_( watcher )
+{
+}
+
 bool T_ShaderCodeLoader::load(
 		__rd__ std::string const& name ,
 		__wr__ T_Frankenshader& code )
 {
 	T_CodeBuilder_ cb( *this , name , code );
-	return cb.buildCode( );
+	const bool rv( cb.buildCode( ) );
+
+	// Update dependencies
+	for ( auto const& dep : code.files ) {
+		deps_[ name ].insert( dep.first );
+	}
+
+	return rv;
 }
 
 T_ShaderInput const* T_ShaderCodeLoader::getInput(
 		__rd__ std::string const& name )
 {
-	auto pos( files.find( name ) );
-	if ( pos != files.end( ) ) {
+	auto pos( inputs_.find( name ) );
+	if ( pos != inputs_.end( ) ) {
 		return pos->second.get( );
 	}
 	T_ShaderInput ni;
 	if ( !ni.load( "shaders/" + name ) ) {
 		return nullptr;
 	}
-	files.emplace( name , std::make_unique< T_ShaderInput >(
-				std::move( ni ) ) );
-	return files.find( name )->second.get( );
+	inputs_.emplace( name , std::make_unique< T_ShaderInput >( std::move( ni ) ) );
+	return inputs_.find( name )->second.get( );
 }
 
 void T_ShaderCodeLoader::removeInput(
 		__rd__ std::string const& name )
 {
-	files.erase( name );
+	inputs_.erase( name );
+}
+
+void T_ShaderCodeLoader::onFileUpdated(
+		__rd__ std::string const& name )
+{
+	inputs_.erase( name );
+	auto& deps( deps_[ name ] );
+	for ( auto const& dep : deps ) {
+		pending_.insert( dep );
+	}
+}
+
+
+bool T_ShaderPipeline::valid( ) const noexcept
+{
+	return Globals::Shaders( ).pipelines_[ smIndex_ ].id != 0;
 }
 
 
@@ -348,7 +379,7 @@ void T_ShaderCodeLoader::removeInput(
 void testLoadShaderFile( )
 {
 	const std::string source( "test-loader.glsl" );
-	T_ShaderCodeLoader loader;
+	T_ShaderCodeLoader loader( Globals::Watcher( ) );
 	T_Frankenshader code;
 	if ( loader.load( source , code ) ) {
 		printf( "SUCCESS! TYPE = %d\n" , int( code.type ) );
diff --git a/shaders.hh b/shaders.hh
index a09a0c4..7d1c582 100644
--- a/shaders.hh
+++ b/shaders.hh
@@ -1,4 +1,5 @@
 #pragma once
+#include "filewatcher.hh"
 #include "utilities.hh"
 
 
@@ -32,7 +33,8 @@ enum class E_ShaderInput {
 	LIBRARY ,		// Library (will only be loaded once)
 
 	// "Main" shader source files
-	VERTEX , FRAGMENT , COMPUTE
+	VERTEX , FRAGMENT , GEOMETRY ,
+	COMPUTE
 };
 
 // Preprocessing errors
@@ -56,7 +58,8 @@ using P_ShaderInput = std::unique_ptr< T_ShaderInput >;
 
 // Type of shader
 enum class E_ShaderType {
-	VERTEX , FRAGMENT , COMPUTE
+	VERTEX , FRAGMENT , COMPUTE ,
+	__COUNT__
 };
 
 
@@ -83,9 +86,42 @@ struct T_Frankenshader
 };
 using P_Frankenshader = std::unique_ptr< T_Frankenshader >;
 
+// A shader program
+struct T_ShaderProgram2 // FIXME: name
+{
+	~T_ShaderProgram2( ) // XXX pipelines, notify loader
+		{ if ( valid( ) ) glDeleteProgram( id_ ); }
+
+
+	bool valid( ) const noexcept
+		{ return id_ != 0; }
+	std::string const& name( ) const noexcept
+		{ return name_; }
+	GLuint id( ) const noexcept
+		{ return id_; }
+
+	bool activate( ) const
+	{
+		if ( valid( ) ) {
+			glUseProgram( id_ );
+			GL_CHECK( return false );
+		}
+		return valid( );
+	}
+
+    private:
+	std::string name_;
+	E_ShaderType type_;
+	GLuint id_;
+};
+
 // XXX test for the loader
 struct T_ShaderCodeLoader
 {
+	T_ShaderCodeLoader( ) = delete;
+	explicit T_ShaderCodeLoader(
+			__rw__ T_FilesWatcher& watcher );
+
 	bool load( __rd__ std::string const& name ,
 			__wr__ T_Frankenshader& code );
 
@@ -93,7 +129,55 @@ struct T_ShaderCodeLoader
 	void removeInput( __rd__ std::string const& name );
 
     private:
-	std::map< std::string , P_ShaderInput > files;
+	T_FilesWatcher& watcher_;
+
+	std::set< std::string > pending_;
+	std::map< std::string , P_ShaderInput > inputs_;
+	std::map< std::string , P_Frankenshader > code_;
+	std::map< std::string , std::set< std::string > > deps_;
+
+	void onFileUpdated( __rd__ std::string const& name );
+};
+
+
+struct T_ShaderPipeline
+{
+	bool valid( ) const noexcept;
+	void enable( ) const;
+
+    private:
+	uint32_t smIndex_;
+};
+
+
+struct T_ShaderManager
+{
+	friend struct T_ShaderPipeline;
+
+	T_ShaderPipeline pipeline(
+			__rd__ std::initializer_list< std::string > shaders );
+
+    private:
+	struct T_Pipeline_
+	{
+		uint32_t references;
+		std::string idString;
+		GLuint id;
+		int32_t programs[ size_t( E_ShaderType::__COUNT__ ) ];
+	};
+
+	struct T_Program_
+	{
+		uint32_t references;
+		std::string name;
+		E_ShaderType type;
+		GLuint id;
+	};
+
+	std::vector< T_Pipeline_ > pipelines_;
+	std::map< std::string , uint32_t > pipelineIndex_;
+
+	std::vector< T_Program_ > program_;
 };
 
 
diff --git a/texture.cc b/texture.cc
index ddbd603..26b2326 100644
--- a/texture.cc
+++ b/texture.cc
@@ -256,25 +256,10 @@ void T_TextureSampler::setSamplingMode( ) const
 
 /*============================================================================*/
 
-constexpr uint32_t T_TextureManagement::MaxUnits;
-std::unique_ptr< T_TextureManagement > T_TextureManagement::instance_;
+constexpr uint32_t T_TextureManager::MaxUnits;
 
 
-T_TextureManagement& T_TextureManagement::TM( )
-{
-	if ( !instance_ ) {
-		instance_.reset( new T_TextureManagement( ) );
-	}
-	return *instance_;
-}
-
-void T_TextureManagement::Shutdown( )
-{
-	instance_.reset( );
-}
-
-
-T_TextureManagement::T_TextureManagement( )
+T_TextureManager::T_TextureManager( )
 {
 	std::shared_ptr< T_TextureSampler > tsam;
 
@@ -295,7 +280,7 @@ T_TextureManagement::T_TextureManagement( )
 	samplers_[ "linear-border" ] = tsam;
 }
 
-T_TextureSampler const* T_TextureManagement::sampler(
+T_TextureSampler const* T_TextureManager::sampler(
 		__rd__ std::string const& name ) const
 {
 	auto pos( samplers_.find( name ) );
@@ -305,7 +290,7 @@ T_TextureSampler const* T_TextureManagement::sampler(
 	return (*pos).second.get( );
 }
 
-void T_TextureManagement::bind(
+void T_TextureManager::bind(
 		__rd__ const uint32_t unit ,
 		__rd__ T_Texture const& texture )
 {
@@ -320,7 +305,7 @@ void T_TextureManagement::bind(
 	glBindSampler( unit , 0 );
 }
 
-void T_TextureManagement::bind(
+void T_TextureManager::bind(
 		__rd__ const uint32_t unit ,
 		__rd__ T_Texture const& texture ,
 		__rd__ T_TextureSampler const& sampler )
@@ -336,7 +321,7 @@ void T_TextureManagement::bind(
 	glBindSampler( unit , sampler.id( ) );
 }
 
-void T_TextureManagement::reset( )
+void T_TextureManager::reset( )
 {
 	for ( auto i = 0u ; i < MaxUnits ; i ++ ) {
 		auto& u( bindings_[ i ] );
diff --git a/texture.hh b/texture.hh
index 40c1f6e..cff5002 100644
--- a/texture.hh
+++ b/texture.hh
@@ -103,15 +103,14 @@ struct T_TextureSampler
 };
 
 
-struct T_TextureManagement
+struct T_TextureManager
 {
 	static constexpr uint32_t MaxUnits = 8;
 
-	NO_COPY( T_TextureManagement );
-	NO_MOVE( T_TextureManagement );
+	T_TextureManager( );
 
-	static T_TextureManagement& TM( );
-	static void Shutdown( );
+	NO_COPY( T_TextureManager );
+	NO_MOVE( T_TextureManager );
 
 	void reset( );
 	T_TextureSampler const* sampler(
@@ -124,10 +123,6 @@ struct T_TextureManagement
 			__rd__ T_TextureSampler const& sampler );
 
     private:
-	static std::unique_ptr< T_TextureManagement > instance_;
-
-	T_TextureManagement( );
-
 	struct T_Binding_
 	{
 		GLuint texture = 0;
diff --git a/utilities.cc b/utilities.cc
index cecf429..04b5b08 100644
--- a/utilities.cc
+++ b/utilities.cc
@@ -39,119 +39,3 @@ void anglesToMatrix(
 	matrix[7] = s[0]*c[1];
 	matrix[8] = c[0]*c[1];
 }
-
-
-/*= T_FilesWatcher ===========================================================*/
-
-T_FilesWatcher::T_FilesWatcher( )
-	: fd( inotify_init1( O_NONBLOCK ) )
-{ }
-
-T_FilesWatcher::T_FilesWatcher( T_FilesWatcher&& other ) noexcept
-	: fd( 0 ) , watched( std::move( other.watched ) )
-{
-	std::swap( fd , other.fd );
-	other.watched.clear( );
-	for ( T_WatchedFiles* wf : watched ) {
-		if ( wf ) {
-			wf->watcher = this;
-		}
-	}
-}
-
-T_FilesWatcher::~T_FilesWatcher( )
-{
-	if ( fd ) {
-		close( fd );
-	}
-	for ( T_WatchedFiles* wf : watched ) {
-		if ( wf ) {
-			wf->watcher = nullptr;
-		}
-	}
-}
-
-void T_FilesWatcher::check( )
-{
-	for ( T_WatchedFiles* wf : watched ) {
-		if ( wf ) {
-			wf->triggered = false;
-		}
-	}
-
-	inotify_event ie;
-	while ( read( fd , &ie , sizeof( ie ) ) == sizeof( ie ) ) {
-		if ( ( ie.mask & ( IN_CLOSE_WRITE | IN_DELETE_SELF ) ) == 0 ) {
-			continue;
-		}
-
-		for ( T_WatchedFiles* wf : watched ) {
-			if ( !wf || wf->triggered ) {
-				continue;
-			}
-			auto const& idl( wf->identifiers );
-			if ( find( idl , ie.wd ) != idl.end( ) ) {
-				wf->triggered = true;
-				wf->callback( );
-			}
-		}
-	}
-}
-
-/*= T_WatchedFiles ===========================================================*/
-
-T_WatchedFiles::T_WatchedFiles( T_WatchedFiles&& other ) noexcept
-	: watcher( other.watcher ) , callback( other.callback ) ,
-		triggered( other.triggered ) ,
-		identifiers( std::move( other.identifiers ) )
-{
-	if ( watcher ) {
-		other.watcher = nullptr;
-		*( find( watcher->watched , &other ) ) = this;
-	}
-}
-
-T_WatchedFiles::T_WatchedFiles(
-		__rw__	T_FilesWatcher& watcher ,
-		__rd__	const F_OnFileChanges callback )
-	: watcher( &watcher ) , callback( callback ) , triggered( false )
-{
-	watcher.watched.push_back( this );
-}
-
-T_WatchedFiles::~T_WatchedFiles( )
-{
-	clear( );
-	if ( watcher ) {
-		watcher->watched.erase( find( watcher->watched , this ) );
-	}
-}
-
-void T_WatchedFiles::clear( )
-{
-	if ( watcher ) {
-		const auto fd( watcher->fd );
-		for ( int wd : identifiers ) {
-			inotify_rm_watch( fd , wd );
-		}
-	}
-	identifiers.clear( );
-}
-
-bool T_WatchedFiles::watch(
-		__rd__	std::string const& file )
-{
-	static constexpr auto inFlags( IN_CLOSE_WRITE | IN_DELETE_SELF );
-	if ( watcher ) {
-		const auto wd( inotify_add_watch( watcher->fd ,
-					file.c_str( ) , inFlags ) );
-		if ( wd == -1 ) {
-			return false;
-		}
-		if ( find( identifiers , wd ) == identifiers.end( ) ) {
-			identifiers.push_back( wd );
-		}
-		return true;
-	}
-	return false;
-}
diff --git a/utilities.hh b/utilities.hh
index eeda6f0..a113218 100644
--- a/utilities.hh
+++ b/utilities.hh
@@ -58,53 +58,3 @@ inline auto find(
 {
 	return std::find( collection.begin( ) , collection.end( ) , item );
 }
-
-
-/*= T_FilesWatcher / T_WatchedFiles ==========================================*/
-
-struct T_FilesWatcher;
-struct T_WatchedFiles;
-using F_OnFileChanges = std::function< void( void ) >;
-
-struct T_FilesWatcher
-{
-	friend struct T_WatchedFiles;
-
-	T_FilesWatcher( T_FilesWatcher const& ) = delete;
-
-	T_FilesWatcher( );
-	T_FilesWatcher( T_FilesWatcher&& ) noexcept;
-	~T_FilesWatcher( );
-
-	void check( );
-
-    private:
-	int fd;
-	std::vector< T_WatchedFiles* > watched;
-};
-
-/*----------------------------------------------------------------------------*/
-
-struct T_WatchedFiles
-{
-	friend struct T_FilesWatcher;
-
-	T_WatchedFiles( ) = delete;
-	T_WatchedFiles( T_WatchedFiles const& ) = delete;
-
-	T_WatchedFiles( T_WatchedFiles&& ) noexcept;
-	T_WatchedFiles(
-			__rw__ T_FilesWatcher& watcher ,
-			__rd__ const F_OnFileChanges callback );
-
-	~T_WatchedFiles( );
-
-	void clear( );
-	bool watch( __rd__ std::string const& file );
-
-    private:
-	T_FilesWatcher* watcher;
-	const F_OnFileChanges callback;
-	bool triggered;
-	std::vector< int > identifiers;
-};
diff --git a/window.cc b/window.cc
new file mode 100644
index 0000000..d57b2ca
--- /dev/null
+++ b/window.cc
@@ -0,0 +1,56 @@
+#include "externals.hh"
+#include "window.hh"
+#include "imgui_impl_sdl.h"
+
+
+T_Window::T_Window( )
+{
+	SDL_Init( SDL_INIT_VIDEO | SDL_INIT_TIMER );
+
+	SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER , 1 );
+	SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE , 24 );
+	SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE , 8 );
+	SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION , 2 );
+	SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION , 2 );
+
+	SDL_DisplayMode current;
+	SDL_GetCurrentDisplayMode( 0 , &current );
+	window = SDL_CreateWindow( "DEMO",
+			SDL_WINDOWPOS_CENTERED , SDL_WINDOWPOS_CENTERED ,
+			1280 , 720 ,
+			SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE );
+	gl = SDL_GL_CreateContext( window );
+	glewInit( );
+	if ( !GLEW_VERSION_4_5 ) {
+		fprintf( stderr , "OpenGL 4.5 required\n" );
+		exit( 1 );
+	}
+
+	ImGui_ImplSdl_Init( window );
+}
+
+T_Window::~T_Window( )
+{
+	ImGui_ImplSdl_Shutdown( );
+	SDL_GL_DeleteContext( gl );
+	SDL_DestroyWindow( window );
+	SDL_Quit( );
+}
+
+void T_Window::startFrame(
+		__rd__ const bool capture ,
+		__rd__ ImVec2 const& mouseInitial ) const
+{
+	ImGui_ImplSdl_NewFrame( window , capture , mouseInitial );
+}
+
+void T_Window::warpMouse(
+		__rd__ ImVec2 const& pos ) const
+{
+	SDL_WarpMouseInWindow( window , pos.x , pos.y );
+}
+
+void T_Window::swap( ) const
+{
+	SDL_GL_SwapWindow( window );
+}
diff --git a/window.hh b/window.hh
new file mode 100644
index 0000000..aab9ca6
--- /dev/null
+++ b/window.hh
@@ -0,0 +1,22 @@
+#pragma once
+#ifndef REAL_BUILD
+# include "externals.hh"
+#endif
+
+
+struct T_Window
+{
+	T_Window( );
+	~T_Window( );
+
+	void startFrame( __rd__ const bool capture ,
+			__rd__ ImVec2 const& mouseInitial ) const;
+	void warpMouse( __rd__ ImVec2 const& pos ) const;
+
+	void swap( ) const;
+
+    private:
+	SDL_Window * window;
+	SDL_GLContext gl;
+};
+