diff --git a/TODO b/TODO
index a0740c4..9e017fe 100644
--- a/TODO
+++ b/TODO
@@ -23,8 +23,6 @@ Compiler / emulator:
 * Check for overrides on the same inputs when setting things up
 * Aliases
 * Display errors in UI
-* Shader paths relative to scripts (will require different way of handling
-libraries)
 
 
 Optimizer:
diff --git a/c-opast.hh b/c-opast.hh
index 8ac4a21..5ab152d 100644
--- a/c-opast.hh
+++ b/c-opast.hh
@@ -828,21 +828,22 @@ class T_PipelineInstrNode : public A_ResourceDefInstrNode
 class T_ProgramInstrNode : public A_ResourceDefInstrNode
 {
     private:
-	T_String path_;
+	T_FSPath path_;
 	ebcl::T_SRDLocation pathLocation_;
 
     public:
 	T_ProgramInstrNode(
 			T_InstrListNode& parent ,
 			ebcl::T_SRDToken const& idToken ,
-			ebcl::T_SRDToken const& pathToken ) noexcept
+			ebcl::T_FSPath path ,
+			ebcl::T_SRDLocation const& pathLoc ) noexcept
 		: A_ResourceDefInstrNode( OP_PROGRAM , parent ,
 				idToken , E_DataType::PROGRAM ) ,
-			path_( pathToken.stringValue( ) ) ,
-			pathLocation_( pathToken.location( ) )
+			path_( std::move( path ) ) ,
+			pathLocation_( pathLoc )
 	{ }
 
-	T_String const& path( ) const noexcept
+	T_FSPath const& path( ) const noexcept
 		{ return path_; }
 	ebcl::T_SRDLocation const& pathLocation( ) const noexcept
 		{ return pathLocation_; }
diff --git a/c-opcomp.cc b/c-opcomp.cc
index 75c0788..3675455 100644
--- a/c-opcomp.cc
+++ b/c-opcomp.cc
@@ -1,6 +1,10 @@
 #include "externals.hh"
+
+#include "common.hh"
+#include "c-project.hh"
 #include "c-ops.hh"
 #include "c-opcomp.hh"
+
 #include <ebcl/Algorithms.hh>
 
 using namespace ebcl;
@@ -505,12 +509,13 @@ bool T_CompilerImpl_::compileNode(
 	    case A_Node::OP_PROGRAM:
 		if ( exit ) {
 			auto& pn( (T_ProgramInstrNode&) node );
-			if ( !output->progNames.contains( pn.path( ) ) ) {
-				output->progNames.add( pn.path( ) );
+			const auto p{ pn.path( ).makeRelative( Common::Project( ).basePath( ) ) };
+			if ( !output->progNames.contains( p ) ) {
+				output->progNames.add( p );
 			}
 			assert( locations.contains( pn.id( ) ) );
 
-			addInstruction( OP_INIT_PROGRAM , output->progNames.indexOf( pn.path( ) ) ,
+			addInstruction( OP_INIT_PROGRAM , output->progNames.indexOf( p ) ,
 					pn.location( ) );
 			addInstruction( OP_STORE , *locations.get( pn.id( ) ) , pn.idLocation( ) );
 		}
diff --git a/c-opparser.cc b/c-opparser.cc
index 185e9e7..576c5d9 100644
--- a/c-opparser.cc
+++ b/c-opparser.cc
@@ -1,5 +1,7 @@
 #include "externals.hh"
 
+#include "common.hh"
+#include "c-project.hh"
 #include "c-opast.hh"
 #include "c-ops.hh"
 #include "c-opcomp.hh"
@@ -1704,8 +1706,21 @@ M_INSTR_( Program )
 		return;
 	}
 
+	T_FSPath path{ input[ 2 ].stringValue( ) };
+	if ( path.isAbsolute( ) ) {
+		path = path.makeRelative( path.root( ) );
+		path = ( Common::Project( ).basePath( ) + path ).canonical( );
+	} else {
+		path = ( curFile.parent( ) + path ).canonical( );
+	}
+	if ( !path.isUnder( Common::Project( ).basePath( ) ) ) {
+		errors.addNew( "shader is not in project directory" ,
+				input[ 2 ].location( ) );
+	}
+
 	T_ProgramInstrNode& program{ instructions.add< T_ProgramInstrNode >(
-				input[ 1 ] , input[ 2 ] ) };
+				input[ 1 ] , std::move( path ) ,
+				input[ 2 ].location( ) ) };
 	program.location( ) = input[ 0 ].location( );
 }
 
diff --git a/c-ops.hh b/c-ops.hh
index 28c100a..86cd6c2 100644
--- a/c-ops.hh
+++ b/c-ops.hh
@@ -142,7 +142,7 @@ struct T_OpProgram
 		 nPipelines{ 0 } ,		// Amount of pipelines
 		 nSamplers{ 0 } ,		// Amount of samplers
 		 nTextures{ 0 };		// Amount of textures
-	T_Array< T_String > progNames;		// GLSL program files
+	T_Array< T_FSPath > progNames;		// GLSL program files
 
 	T_Array< T_String > uiStrings;		// UI strings for profiling, etc.
 	T_Array< P_SyncOverrideSection > overrides;
diff --git a/c-project.cc b/c-project.cc
index 208ebd1..d718fbc 100644
--- a/c-project.cc
+++ b/c-project.cc
@@ -34,6 +34,12 @@ void T_Project::setBasePath(
 T_FSPath T_Project::pathOf(
 		T_FSPath const& file ) const noexcept
 {
+	if ( file.isAbsolute( ) ) {
+		if ( file.canonical( ).isUnder( basePath_ ) ) {
+			return file;
+		}
+		return basePath_;
+	}
 	return ( basePath_ + file ).canonical( );
 }
 
diff --git a/c-shaders.cc b/c-shaders.cc
index 38a15b6..73561f0 100644
--- a/c-shaders.cc
+++ b/c-shaders.cc
@@ -1,4 +1,6 @@
 #include "externals.hh"
+#include "common.hh"
+#include "c-project.hh"
 #include "c-shaders.hh"
 
 
@@ -30,6 +32,7 @@ struct T_InputReader_
 {
 	using T_Tokens_ = std::vector< std::string >;
 
+	const T_FSPath path;
 	FILE* const file;
 	T_ShaderInput& input;
 	uint32_t line{ 0 };
@@ -40,9 +43,10 @@ struct T_InputReader_
 	std::string accumulator{ };
 	uint32_t accumLines{ 0 };
 
-	T_InputReader_( FILE* const file ,
+	T_InputReader_( T_FSPath const& path ,
+			FILE* const file ,
 			T_ShaderInput& input )
-		: file( file ) , input( input )
+		: path( path ) , file( file ) , input( input )
 	{ }
 	~T_InputReader_( );
 
@@ -100,9 +104,28 @@ void T_InputReader_::handleDirective(
 			error( "invalid arguments" );
 			return;
 		}
+
+		T_FSPath inclPath{ tokens[ 1 ].c_str( ) };
+		if ( !inclPath.isValid( ) ) {
+			nl( );
+			error( "invalid path" );
+			return;
+		}
+		if ( inclPath.isAbsolute( ) ) {
+			inclPath = inclPath.makeRelative( inclPath.root( ) );
+			inclPath = ( Common::Project( ).basePath( ) + inclPath ).canonical( );
+		} else {
+			inclPath = ( path.parent( ) + inclPath ).canonical( );
+		}
+		if ( !inclPath.isUnder( Common::Project( ).basePath( ) ) ) {
+			nl( );
+			error( "path is outside of project" );
+			return;
+		}
+
 		addAccumulated( );
 		auto& ck( input.chunks );
-		ck.addNew( E_ShaderInputChunk::INCLUDE , tokens[ 1 ].c_str( ) , 1 );
+		ck.addNew( inclPath , 1 );
 
 	} else if ( directive == "type" ) {
 		nl( );
@@ -141,8 +164,7 @@ void T_InputReader_::addAccumulated( )
 {
 	if ( accumLines ) {
 		auto& ck( input.chunks );
-		ck.addNew( E_ShaderInputChunk::CODE ,
-				accumulator.c_str( ) , accumLines );
+		ck.addNew( accumulator.c_str( ) , accumLines );
 		accumulator = {};
 		accumLines = 0;
 	}
@@ -154,18 +176,19 @@ void T_InputReader_::addAccumulated( )
 /*= T_ShaderInput ============================================================*/
 
 bool T_ShaderInput::load(
-		T_String const& path )
+		T_FSPath const& path )
 {
 	type = E_ShaderInput::CHUNK;
 	chunks.clear( );
 	errors.clear( );
 
-	FILE* const file{ fopen( (char const*) path.toOSString( ).data( ) , "r" ) };
+	const auto osPath{ path.toString( ).toOSString( ) };
+	FILE* const file{ fopen( (char const*) osPath.data( ) , "r" ) };
 	if ( !file ) {
 		return false;
 	}
 
-	T_InputReader_ reader( file , *this );
+	T_InputReader_ reader{ path , file , *this };
 	reader.read( );
 
 	return true;
diff --git a/c-shaders.hh b/c-shaders.hh
index 5ea3741..d7e2918 100644
--- a/c-shaders.hh
+++ b/c-shaders.hh
@@ -17,20 +17,20 @@ enum class E_ShaderType {
 // the input loader, the shader loader or the driver.
 struct T_ShaderError
 {
-	T_String source;
+	T_FSPath source;
 	uint32_t line;
 	T_String error;
 
 	T_ShaderError( ) = default;
 
-	T_ShaderError( T_String source ,
+	T_ShaderError( T_FSPath source ,
 			const uint32_t line ,
 			T_String error )
 		: source( std::move( source ) ) , line( line ) ,
 			error( std::move( error ) )
 	{ }
 
-	T_ShaderError( T_String source ,
+	T_ShaderError( T_FSPath source ,
 			const uint32_t line ,
 			T_StringBuilder& error )
 		: source( std::move( source ) ) , line( line ) ,
@@ -51,15 +51,25 @@ enum class E_ShaderInputChunk {
 struct T_ShaderInputChunk
 {
 	E_ShaderInputChunk type;
-	T_String text;
+	T_Union< T_String , T_FSPath > data;
 	uint32_t lines;
 
 	T_ShaderInputChunk( ) = default;
+
 	T_ShaderInputChunk(
-			const E_ShaderInputChunk type ,
 			T_String text ,
 			const uint32_t lines )
-		: type( type ) , text( std::move( text ) ) , lines( lines )
+		: type( E_ShaderInputChunk::CODE ) ,
+			data( std::move( text ) ) ,
+			lines( lines )
+	{ }
+
+	T_ShaderInputChunk(
+			T_FSPath path ,
+			const uint32_t lines )
+		: type( E_ShaderInputChunk::INCLUDE ) ,
+			data( std::move( path ) ) ,
+			lines( lines )
 	{ }
 };
 
@@ -93,6 +103,6 @@ struct T_ShaderInput
 	T_Array< T_ShaderInputChunk > chunks;
 	T_Array< T_ShaderInputError > errors;
 
-	bool load( T_String const& path );
+	bool load( T_FSPath const& path );
 };
 using P_ShaderInput = T_OwnPtr< T_ShaderInput >;
diff --git a/test/demo.srd b/test/demo.srd
index 69d3872..8f80f0e 100644
--- a/test/demo.srd
+++ b/test/demo.srd
@@ -1,7 +1,7 @@
-(include "fx-bloom.srd")
-(include "fx-dof.srd")
-(include "fx-combine.srd")
-(include "fx-fxaa.srd")
+(include "fx-bloom/fx-bloom.srd")
+(include "fx-dof/fx-dof.srd")
+(include "fx-combine/fx-combine.srd")
+(include "fx-fxaa/fx-fxaa.srd")
 
 (init
 	# Compute viewport size
@@ -20,7 +20,7 @@
 	(set vp-x (div (sub $width $vp-width) 2))
 	(set vp-y (div (sub $height $vp-height) 2))
 
-	(program prg-fullscreen "fullscreen.v.glsl")
+	(program prg-fullscreen "/fullscreen.v.glsl")
 
 	(set use-compute 1)
 
diff --git a/test/shaders/fullscreen.v.glsl b/test/fullscreen.v.glsl
similarity index 100%
rename from test/shaders/fullscreen.v.glsl
rename to test/fullscreen.v.glsl
diff --git a/test/shaders/bloom-highpass.f.glsl b/test/fx-bloom/bloom-highpass.f.glsl
similarity index 100%
rename from test/shaders/bloom-highpass.f.glsl
rename to test/fx-bloom/bloom-highpass.f.glsl
diff --git a/test/shaders/blur-pass.f.glsl b/test/fx-bloom/blur-pass.f.glsl
similarity index 100%
rename from test/shaders/blur-pass.f.glsl
rename to test/fx-bloom/blur-pass.f.glsl
diff --git a/test/shaders/downsample.f.glsl b/test/fx-bloom/downsample.f.glsl
similarity index 100%
rename from test/shaders/downsample.f.glsl
rename to test/fx-bloom/downsample.f.glsl
diff --git a/test/fx-bloom.srd b/test/fx-bloom/fx-bloom.srd
similarity index 100%
rename from test/fx-bloom.srd
rename to test/fx-bloom/fx-bloom.srd
diff --git a/test/shaders/combine.c.glsl b/test/fx-combine/combine.c.glsl
similarity index 98%
rename from test/shaders/combine.c.glsl
rename to test/fx-combine/combine.c.glsl
index 8776efd..4da4e24 100644
--- a/test/shaders/combine.c.glsl
+++ b/test/fx-combine/combine.c.glsl
@@ -6,7 +6,7 @@ layout(
 ) in;
 
 //! type compute
-//! include lib/utils.glsl
+//! include /lib/utils.glsl
 
 layout( location = 0 ) uniform sampler2D u_MainInput;
 layout( location = 1 ) uniform sampler2D u_BlurInput;
diff --git a/test/shaders/combine.f.glsl b/test/fx-combine/combine.f.glsl
similarity index 98%
rename from test/shaders/combine.f.glsl
rename to test/fx-combine/combine.f.glsl
index 2205da4..f1bb8ae 100644
--- a/test/shaders/combine.f.glsl
+++ b/test/fx-combine/combine.f.glsl
@@ -1,7 +1,7 @@
 #version 450 core
 
 //! type fragment
-//! include lib/utils.glsl
+//! include /lib/utils.glsl
 
 layout( location = 0 ) uniform sampler2D u_MainInput;
 layout( location = 1 ) uniform sampler2D u_BlurInput;
diff --git a/test/fx-combine.srd b/test/fx-combine/fx-combine.srd
similarity index 100%
rename from test/fx-combine.srd
rename to test/fx-combine/fx-combine.srd
diff --git a/test/shaders/chunks/dof-cs.glsl b/test/fx-dof/dof-cs.glsl
similarity index 98%
rename from test/shaders/chunks/dof-cs.glsl
rename to test/fx-dof/dof-cs.glsl
index 7130d21..d6ddefb 100644
--- a/test/shaders/chunks/dof-cs.glsl
+++ b/test/fx-dof/dof-cs.glsl
@@ -17,7 +17,7 @@ layout( location = 4 ) uniform vec3 u_ResolutionTime;
 
 layout( binding = 0 , rgba16f ) writeonly uniform image2D u_Output;
 
-//!include lib/utils.glsl
+//!include /lib/utils.glsl
 
 float DOF_CoC(
 	in float z )
diff --git a/test/shaders/lib/dof.glsl b/test/fx-dof/dof-lib.glsl
similarity index 97%
rename from test/shaders/lib/dof.glsl
rename to test/fx-dof/dof-lib.glsl
index 5fd17c5..9807a71 100644
--- a/test/shaders/lib/dof.glsl
+++ b/test/fx-dof/dof-lib.glsl
@@ -1,5 +1,5 @@
 //!type library
-//!include lib/utils.glsl
+//!include /lib/utils.glsl
 
 float DOF_CoC(
 	in float z )
diff --git a/test/shaders/dof-pass1.c.glsl b/test/fx-dof/dof-pass1.c.glsl
similarity index 92%
rename from test/shaders/dof-pass1.c.glsl
rename to test/fx-dof/dof-pass1.c.glsl
index 0e9315a..d8a2a49 100644
--- a/test/shaders/dof-pass1.c.glsl
+++ b/test/fx-dof/dof-pass1.c.glsl
@@ -7,7 +7,7 @@ layout(
 	local_size_y = 64
 ) in;
 
-//! include chunks/dof-cs.glsl
+//! include dof-cs.glsl
 
 void main()
 {
diff --git a/test/shaders/dof-pass1.f.glsl b/test/fx-dof/dof-pass1.f.glsl
similarity index 89%
rename from test/shaders/dof-pass1.f.glsl
rename to test/fx-dof/dof-pass1.f.glsl
index 800ff2d..825e041 100644
--- a/test/shaders/dof-pass1.f.glsl
+++ b/test/fx-dof/dof-pass1.f.glsl
@@ -1,7 +1,7 @@
 #version 450 core
 
 //! type fragment
-//! include chunks/dof.glsl
+//! include dof.glsl
 
 void main()
 {
diff --git a/test/shaders/dof-pass2.c.glsl b/test/fx-dof/dof-pass2.c.glsl
similarity index 95%
rename from test/shaders/dof-pass2.c.glsl
rename to test/fx-dof/dof-pass2.c.glsl
index d322ce1..269fa40 100644
--- a/test/shaders/dof-pass2.c.glsl
+++ b/test/fx-dof/dof-pass2.c.glsl
@@ -7,7 +7,7 @@ layout(
 	local_size_y = 20
 ) in;
 
-//! include chunks/dof-cs.glsl
+//! include dof-cs.glsl
 
 void main()
 {
diff --git a/test/shaders/dof-pass2.f.glsl b/test/fx-dof/dof-pass2.f.glsl
similarity index 94%
rename from test/shaders/dof-pass2.f.glsl
rename to test/fx-dof/dof-pass2.f.glsl
index 16ab9f7..2814ed1 100644
--- a/test/shaders/dof-pass2.f.glsl
+++ b/test/fx-dof/dof-pass2.f.glsl
@@ -1,7 +1,7 @@
 #version 450 core
 
 //! type fragment
-//! include chunks/dof.glsl
+//! include dof.glsl
 
 void main()
 {
diff --git a/test/shaders/chunks/dof.glsl b/test/fx-dof/dof.glsl
similarity index 95%
rename from test/shaders/chunks/dof.glsl
rename to test/fx-dof/dof.glsl
index e18b7aa..c447232 100644
--- a/test/shaders/chunks/dof.glsl
+++ b/test/fx-dof/dof.glsl
@@ -20,4 +20,4 @@ layout( location = 4 ) uniform vec3 u_ResolutionTime;
 layout( location = 0 ) out vec3 o_Color;
 
 
-//!include lib/dof.glsl
+//!include dof-lib.glsl
diff --git a/test/fx-dof.srd b/test/fx-dof/fx-dof.srd
similarity index 100%
rename from test/fx-dof.srd
rename to test/fx-dof/fx-dof.srd
diff --git a/test/fx-fxaa.srd b/test/fx-fxaa/fx-fxaa.srd
similarity index 100%
rename from test/fx-fxaa.srd
rename to test/fx-fxaa/fx-fxaa.srd
diff --git a/test/shaders/chunks/fxaa-3.11.glsl b/test/fx-fxaa/fxaa-3.11.glsl
similarity index 100%
rename from test/shaders/chunks/fxaa-3.11.glsl
rename to test/fx-fxaa/fxaa-3.11.glsl
diff --git a/test/shaders/fxaa.f.glsl b/test/fx-fxaa/fxaa.f.glsl
similarity index 97%
rename from test/shaders/fxaa.f.glsl
rename to test/fx-fxaa/fxaa.f.glsl
index e3eb9bb..a4fc38d 100644
--- a/test/shaders/fxaa.f.glsl
+++ b/test/fx-fxaa/fxaa.f.glsl
@@ -8,7 +8,7 @@
 #define FXAA_GATHER4_ALPHA 1
 #define FXAA_QUALITY__PRESET 39
 
-//! include chunks/fxaa-3.11.glsl
+//! include fxaa-3.11.glsl
 
 layout( location = 0 ) uniform sampler2D u_Input;
 layout( location = 1 ) uniform vec4 u_Viewport;
diff --git a/test/shaders/lib/fog.glsl b/test/lib/fog.glsl
similarity index 100%
rename from test/shaders/lib/fog.glsl
rename to test/lib/fog.glsl
diff --git a/test/shaders/lib/hg_sdf.glsl b/test/lib/hg_sdf.glsl
similarity index 96%
rename from test/shaders/lib/hg_sdf.glsl
rename to test/lib/hg_sdf.glsl
index a9285c0..48c6776 100644
--- a/test/shaders/lib/hg_sdf.glsl
+++ b/test/lib/hg_sdf.glsl
@@ -126,7 +126,7 @@
 
 
 //! type library
-//! include lib/utils.glsl
+//! include utils.glsl
 
 
 
diff --git a/test/shaders/chunks/raymarcher-cs.glsl b/test/lib/raymarcher-cs.glsl
similarity index 95%
rename from test/shaders/chunks/raymarcher-cs.glsl
rename to test/lib/raymarcher-cs.glsl
index 4d33ec7..9818222 100644
--- a/test/shaders/chunks/raymarcher-cs.glsl
+++ b/test/lib/raymarcher-cs.glsl
@@ -19,4 +19,4 @@ layout( location = 8 ) uniform int u_Correction;
 //layout( location = 1 ) out float o_Z;
 layout( binding = 0 , rgba16f ) writeonly uniform image2D u_Output;
 
-//! include lib/raymarching.glsl
+//! include raymarching.glsl
diff --git a/test/shaders/chunks/raymarcher.glsl b/test/lib/raymarcher.glsl
similarity index 94%
rename from test/shaders/chunks/raymarcher.glsl
rename to test/lib/raymarcher.glsl
index a11a929..aa80915 100644
--- a/test/shaders/chunks/raymarcher.glsl
+++ b/test/lib/raymarcher.glsl
@@ -13,4 +13,4 @@ layout( location = 8 ) uniform int u_Correction;
 layout( location = 0 ) out vec3 o_Color;
 layout( location = 1 ) out float o_Z;
 
-//! include lib/raymarching.glsl
+//! include raymarching.glsl
diff --git a/test/shaders/lib/raymarching.glsl b/test/lib/raymarching.glsl
similarity index 99%
rename from test/shaders/lib/raymarching.glsl
rename to test/lib/raymarching.glsl
index 8a651d4..f9f9648 100644
--- a/test/shaders/lib/raymarching.glsl
+++ b/test/lib/raymarching.glsl
@@ -1,5 +1,5 @@
 //! type library
-//! include lib/utils.glsl
+//! include utils.glsl
 
 vec2 RM_Map( in vec3 pos );
 
diff --git a/test/shaders/lib/shading-blinnphong.glsl b/test/lib/shading-blinnphong.glsl
similarity index 100%
rename from test/shaders/lib/shading-blinnphong.glsl
rename to test/lib/shading-blinnphong.glsl
diff --git a/test/shaders/lib/shading-pbr.glsl b/test/lib/shading-pbr.glsl
similarity index 99%
rename from test/shaders/lib/shading-pbr.glsl
rename to test/lib/shading-pbr.glsl
index 325e9d1..48365bf 100644
--- a/test/shaders/lib/shading-pbr.glsl
+++ b/test/lib/shading-pbr.glsl
@@ -1,5 +1,5 @@
 //! type library
-//! include lib/utils.glsl
+//! include utils.glsl
 
 
 struct T_PBRMaterial
diff --git a/test/shaders/lib/utils.glsl b/test/lib/utils.glsl
similarity index 100%
rename from test/shaders/lib/utils.glsl
rename to test/lib/utils.glsl
diff --git a/test/shaders/scene.c.glsl b/test/scene.c.glsl
similarity index 96%
rename from test/shaders/scene.c.glsl
rename to test/scene.c.glsl
index a561218..800413c 100644
--- a/test/shaders/scene.c.glsl
+++ b/test/scene.c.glsl
@@ -1,12 +1,12 @@
 #version 450 core
 //! type compute
 
-//! include chunks/raymarcher-cs.glsl
-//! include lib/hg_sdf.glsl
+//! include /lib/raymarcher-cs.glsl
+//! include /lib/hg_sdf.glsl
 
-//! include lib/shading-pbr.glsl
-//! include lib/shading-blinnphong.glsl
-//! include lib/fog.glsl
+//! include /lib/shading-pbr.glsl
+//! include /lib/shading-blinnphong.glsl
+//! include /lib/fog.glsl
 
 
 T_BPMaterial BPMaterials[1] = {
diff --git a/test/shaders/scene.f.glsl b/test/scene.f.glsl
similarity index 95%
rename from test/shaders/scene.f.glsl
rename to test/scene.f.glsl
index 3a7237f..9040dc7 100644
--- a/test/shaders/scene.f.glsl
+++ b/test/scene.f.glsl
@@ -1,12 +1,12 @@
 #version 450 core
 //! type fragment
 
-//! include chunks/raymarcher.glsl
-//! include lib/hg_sdf.glsl
+//! include /lib/raymarcher.glsl
+//! include /lib/hg_sdf.glsl
 
-//! include lib/shading-pbr.glsl
-//! include lib/shading-blinnphong.glsl
-//! include lib/fog.glsl
+//! include /lib/shading-pbr.glsl
+//! include /lib/shading-blinnphong.glsl
+//! include /lib/fog.glsl
 
 
 T_BPMaterial BPMaterials[1] = {
diff --git a/ui-opemu.cc b/ui-opemu.cc
index 6b99cef..a35886e 100644
--- a/ui-opemu.cc
+++ b/ui-opemu.cc
@@ -436,7 +436,7 @@ void T_OpContext::run(
 				if ( !prIndex ) {
 					throw X_OpFailure{ instr , "pipeline uses uninitialised program" };
 				}
-				progNames[ i ] = programs[ prIndex - 1 ]->name( );
+				progNames[ i ] = programs[ prIndex - 1 ]->name( ).toString( );
 			}
 
 			pipelines[ plIndex ] = NewOwned< T_ShaderPipeline >(
diff --git a/ui-shaders.cc b/ui-shaders.cc
index 1a5bbfa..0928d98 100644
--- a/ui-shaders.cc
+++ b/ui-shaders.cc
@@ -133,7 +133,7 @@ T_Optional< E_ShaderType > T_ShaderProgram::type( ) const
 	}
 }
 
-T_String T_ShaderProgram::name( ) const
+T_FSPath T_ShaderProgram::name( ) const
 {
 	if ( id_ ) {
 		return UI::Shaders( ).programs_[ id_ - 1 ].name;
@@ -260,32 +260,32 @@ GLuint T_ShaderPipeline::program(
 
 namespace {
 
-using F_GetInput_ = std::function< T_ShaderInput const*( T_String const& ) >;
+using F_GetInput_ = std::function< T_ShaderInput const*( T_FSPath const& ) >;
 using T_Code_ = T_ShaderManager::T_ShaderCode;
 
 // Code builder, state and functions
 struct T_CodeBuilder_
 {
 	struct T_StackEntry_ {
-		T_String name;
+		T_FSPath name;
 		T_ShaderInput const* input;
 		uint32_t pos;
 	};
 
 	F_GetInput_ loader;
-	const T_String name;
+	const T_FSPath name;
 	T_Code_& code;
 
 	T_ShaderInput const* main;
-	T_KeyValueTable< T_String , uint32_t > pos;
+	T_KeyValueTable< T_FSPath , uint32_t > pos;
 	std::vector< T_StackEntry_ > stack;
-	T_Array< T_String > libraries;
+	T_Array< T_FSPath > libraries;
 	T_ShaderInput const* current;
 	uint32_t cpos{ 0 };
-	T_String cname;
+	T_FSPath cname;
 
 	T_CodeBuilder_( F_GetInput_ loader ,
-			T_String const& name ,
+			T_FSPath const& name ,
 			T_Code_& code )
 		: loader( loader ) , name( name ) , code( code ) ,
 			main( loader( name ) )
@@ -293,13 +293,13 @@ struct T_CodeBuilder_
 
 	bool buildCode( );
 	void appendChunk( T_ShaderInputChunk const& chunk );
-	void include( T_String const& name ,
+	void include( T_FSPath const& name ,
 			const uint32_t lines );
 	void next( );
 
 	void addInputLoaderErrors(
 			T_ShaderInput const* input ,
-			T_String const& name );
+			T_FSPath const& name );
 };
 
 /*----------------------------------------------------------------------------*/
@@ -326,7 +326,7 @@ bool T_CodeBuilder_::buildCode( )
 		if ( chunk.type == E_ShaderInputChunk::CODE ) {
 			appendChunk( chunk );
 		} else {
-			include( chunk.text , chunk.lines );
+			include( chunk.data.value< T_FSPath >( ) , chunk.lines );
 		}
 
 		next( );
@@ -347,12 +347,12 @@ void T_CodeBuilder_::appendChunk(
 	code.sources.addNew( cname );
 	code.counts.add( chunk.lines );
 	code.starts.add( *p );
-	code.code << chunk.text;
+	code.code << chunk.data.value< T_String >( );
 	*p += chunk.lines;
 }
 
 void T_CodeBuilder_::include(
-		T_String const& nname ,
+		T_FSPath const& nname ,
 		const uint32_t lines )
 {
 	auto* const p( pos.get( cname ) );
@@ -376,7 +376,7 @@ void T_CodeBuilder_::include(
 		return;
 	}
 
-	T_ShaderInput const* const isi( loader( nname ) );
+	T_ShaderInput const* const isi{ loader( nname ) };
 	code.files.add( nname , isi != nullptr );
 
 	// Check for problems
@@ -420,7 +420,7 @@ void T_CodeBuilder_::next( )
 
 void T_CodeBuilder_::addInputLoaderErrors(
 		T_ShaderInput const* input ,
-		T_String const& name )
+		T_FSPath const& name )
 {
 	for ( auto const& errs : input->errors ) {
 		code.errors.addNew( name , errs.line , (char*) errs.error.toOSString( ).data( ) );
@@ -441,7 +441,7 @@ T_ShaderManager::T_ShaderManager( ) noexcept
 /*----------------------------------------------------------------------------*/
 
 T_ShaderProgram T_ShaderManager::program(
-		T_String const& name )
+		T_FSPath const& name )
 {
 	loadProgram( name );
 	assert( programIndex_.contains( name ) );
@@ -530,16 +530,16 @@ T_ShaderPipeline T_ShaderManager::pipeline(
 void T_ShaderManager::update( )
 {
 	using namespace ebcl;
-	T_Set< T_String > temp{ UseTag< ArrayBacked< 64 > >( ) };
+	T_Set< T_FSPath > temp{ UseTag< ArrayBacked< 64 > >( ) };
 	T_StringBuilder sb;
 	inputs_.clear( );
 
 	// Check for missing files
 	for ( auto it = missing_.keys( ).cbegin( ) ; it.valid( ) ; ++it ) {
-		const bool exists( ([] ( T_String const& name ) -> bool {
-			T_FSPath p{ T_FSPath{ "shaders" } + T_FSPath{ name } };
+		const bool exists( ([] ( T_FSPath const& name ) -> bool {
 			struct stat buffer;
-			return ( stat( Common::Project( ).strPathOf( p ).data( ) , &buffer ) == 0 );
+			const auto p{ Common::Project( ).strPathOf( name ).toOSString( ) };
+			return ( stat( (char const*) p.data( ) , &buffer ) == 0 );
 		})( *it ) );
 		if ( !exists ) {
 			continue;
@@ -613,7 +613,7 @@ void T_ShaderManager::update( )
 
 void T_ShaderManager::loadProgram(
 		T_String const& pipeline ,
-		T_String const& name )
+		T_FSPath const& name )
 {
 	if ( !useExistingProgram( pipeline , name ) ) {
 		initProgramRecord( name ).plReferences.add( pipeline );
@@ -622,7 +622,7 @@ void T_ShaderManager::loadProgram(
 
 bool T_ShaderManager::useExistingProgram(
 		T_String const& pipeline ,
-		T_String const& name )
+		T_FSPath const& name )
 {
 	auto const* pos( programIndex_.get( name ) );
 	if ( !pos ) {
@@ -635,7 +635,7 @@ bool T_ShaderManager::useExistingProgram(
 }
 
 void T_ShaderManager::loadProgram(
-		T_String const& name )
+		T_FSPath const& name )
 {
 	if ( !useExistingProgram( name ) ) {
 		initProgramRecord( name );
@@ -653,7 +653,7 @@ void T_ShaderManager::loadBuiltinProgram(
 }
 
 bool T_ShaderManager::useExistingProgram(
-		T_String const& name )
+		T_FSPath const& name )
 {
 	auto const* pos( programIndex_.get( name ) );
 	if ( !pos ) {
@@ -680,7 +680,7 @@ uint32_t T_ShaderManager::newProgramRecord( )
 }
 
 T_ShaderManager::T_Program_& T_ShaderManager::initProgramRecord(
-		T_String const& name ,
+		T_FSPath const& name ,
 		const E_ShaderType type ,
 		char const* const source )
 {
@@ -713,24 +713,32 @@ T_ShaderManager::T_Program_& T_ShaderManager::initProgramRecord(
 /*----------------------------------------------------------------------------*/
 
 T_ShaderInput const* T_ShaderManager::getInput(
-		T_String const& name )
+		T_FSPath const& name )
 {
-	auto const* const existing( inputs_.get( name ) );
+	T_FSPath extra;
+	T_FSPath const* absPath;
+	T_FSPath const* relPath;
+	if ( name.isAbsolute( ) ) {
+		extra = name.makeRelative( Common::Project( ).basePath( ) );
+		absPath = &name;
+		relPath = &extra;
+	} else {
+		extra = Common::Project( ).pathOf( name );
+		absPath = &extra;
+		relPath = &name;
+	}
+
+	auto const* const existing( inputs_.get( *relPath ) );
 	if ( existing ) {
 		return existing->get( );
 	}
 
 	T_ShaderInput ni;
-	const T_String path{ [&]() -> T_String {
-		T_StringBuilder sb;
-		sb << "shaders/" << name;
-		return std::move( sb );
-	}() };
-	if ( !ni.load( Common::Project( ).strPathOf( path ) ) ) {
+	if ( !ni.load( *absPath ) ) {
 		return nullptr;
 	}
-	inputs_.add( name , NewOwned< T_ShaderInput >( std::move( ni ) ) );
-	return inputs_.get( name )->get( );
+	inputs_.add( *relPath , NewOwned< T_ShaderInput >( std::move( ni ) ) );
+	return inputs_.get( *relPath )->get( );
 }
 
 /*----------------------------------------------------------------------------*/
@@ -844,15 +852,13 @@ void T_ShaderManager::initProgram(
 
 	// Build the code
 	auto name( program.name );
-	printf( "init program %s\n" , program.name.toOSString( ).data( ) );
+	printf( "init program %s\n" , program.name.toString( ).toOSString( ).data( ) );
 	auto& code( program.code );
-	T_CodeBuilder_ cb( [this]( T_String const& n ) { return getInput( n ); } ,
-			name , code );
-	const bool built(
-			T_CodeBuilder_{
-				[this]( T_String const& n ) { return getInput( n ); } ,
-				program.name , code
-			}.buildCode( ) );
+	T_CodeBuilder_ cb{
+		[this]( T_FSPath const& n ) { return getInput( n ); } ,
+		name , code
+	};
+	const bool built{ cb.buildCode( ) };
 
 	// Initialise file watcher + missing files
 	program.watch = T_WatchedFiles{ Common::Watcher( ) ,
@@ -862,10 +868,9 @@ void T_ShaderManager::initProgram(
 	const auto nf( code.files.size( ) );
 	auto& w( *( program.watch.target( ) ) );
 	for ( auto i = 0u ; i < nf ; i ++ ) {
-		T_String const& fn( code.files.keys( )[ i ] );
+		T_FSPath const& fn( code.files.keys( )[ i ] );
 		if ( code.files.values( )[ i ] ) {
-			T_FSPath p{ T_FSPath{ "shaders" } + T_FSPath{ fn } };
-			w.watch( Common::Project( ).strPathOf( p ) );
+			w.watch( Common::Project( ).pathOf( fn ) );
 		} else {
 			auto& mset( missing_.getOrCreate( fn ) );
 			if ( !mset.contains( name ) ) {
@@ -875,6 +880,7 @@ void T_ShaderManager::initProgram(
 	}
 
 	if ( !( built && code.errors.empty( ) ) ) {
+		printf( "... failed\n" );
 		return;
 	}
 	buildProgram( program );
@@ -887,7 +893,7 @@ void T_ShaderManager::initBuiltinProgram(
 {
 	auto name( program.name );
 	printf( "init built-in program %s\n" ,
-			program.name.substr( 1 ).toOSString( ).data( ) );
+			program.name.toString( ).substr( 1 ).toOSString( ).data( ) );
 
 	program.code.code << source << '\0';
 	program.code.type = type;
@@ -968,7 +974,7 @@ void T_ShaderManager::parseGLSLError(
 	}
 
 	code.errors.addNew(
-			pos == 0 ? "*unknown*" : ((char*)code.sources[ pos - 1 ].toOSString( ).data( ) ) ,
+			pos == 0 ? T_FSPath{ "*unknown*" } : code.sources[ pos - 1 ] ,
 			pos == 0 ? 0 : ( rawLine + code.counts[ pos - 1 ] - check + code.starts[ pos - 1 ] ) ,
 			errorLine );
 }
@@ -976,7 +982,7 @@ void T_ShaderManager::parseGLSLError(
 /*----------------------------------------------------------------------------*/
 
 void T_ShaderManager::programUpdated(
-		T_String const& name )
+		T_FSPath const& name )
 {
 	if ( !updates_.contains( name ) ) {
 		updates_.add( name );
@@ -998,7 +1004,7 @@ void T_ShaderManager::resetProgram(
 	auto const& files( program.code.files );
 	const auto nf( files.size( ) );
 	for ( auto i = 0u ; i < nf ; i ++ ) {
-		T_String const& k{ files.keys( )[ i ] };
+		T_FSPath const& k{ files.keys( )[ i ] };
 		bool v{ files[ i ] };
 		auto* const ptr( missing_.get( k ) );
 		if ( v || !ptr ) {
@@ -1032,7 +1038,7 @@ void T_ShaderManager::makeUI( )
 	const auto n( std::count_if( programs_.begin( ) , programs_.end( ) ,
 		[]( auto const& p ) {
 			return ( !p.plReferences.empty( ) || p.saReferences != 0 )
-				&& !p.name.startsWith( "*" );
+				&& p.name.isValid( );
 		} ) );
 
 	std::vector< size_t > indices;
@@ -1040,7 +1046,7 @@ void T_ShaderManager::makeUI( )
 	for ( auto i = 0u ; i < rn ; i ++ ) {
 		auto const& p( programs_[ i ] );
 		if ( ( !p.plReferences.empty( ) || p.saReferences )
-				&& !p.name.startsWith( "*" ) ) {
+				&& p.name.isValid( ) ) {
 			indices.push_back( i );
 		}
 	}
@@ -1064,11 +1070,11 @@ void T_ShaderManager::makeUI( )
 		const bool open( nErrors
 				? TreeNodeEx( &program , ImGuiTreeNodeFlags_OpenOnArrow
 						| ImGuiTreeNodeFlags_OpenOnDoubleClick , "%s" ,
-					program.name.toOSString( ).data( ) )
+					program.name.toString( ).toOSString( ).data( ) )
 				: false );
 
 		if ( !nErrors ) {
-			Text( "%s" , program.name.toOSString( ).data( ) );
+			Text( "%s" , program.name.toString( ).toOSString( ).data( ) );
 		}
 
 		SameLine( 400 );
@@ -1087,10 +1093,12 @@ void T_ShaderManager::makeUI( )
 			for ( auto const& err : program.code.errors ) {
 				NewLine( );
 				SameLine( 50 );
-				Text( "%s" , err.source.toOSString( ).data( ) );
-				SameLine( 250 );
+				Text( "%s" , err.source.makeRelative(
+							Common::Project( ).basePath( )
+						).toString( ).toOSString( ).data( ) );
+				SameLine( 350 );
 				Text( "line %d" , err.line );
-				SameLine( 370 );
+				SameLine( 470 );
 				Text( "%s" , err.error.toOSString( ).data( ) );
 			}
 			TreePop( );
diff --git a/ui-shaders.hh b/ui-shaders.hh
index 5700046..cdd41fb 100644
--- a/ui-shaders.hh
+++ b/ui-shaders.hh
@@ -18,7 +18,7 @@ struct T_ShaderProgram
 	void enable( ) const;
 	GLuint id( ) const;
 	T_Optional< E_ShaderType > type( ) const;
-	T_String name( ) const;
+	T_FSPath name( ) const;
 
     private:
 	explicit T_ShaderProgram( uint32_t id ) noexcept;
@@ -56,16 +56,16 @@ struct T_ShaderManager
 		E_ShaderType type;
 		T_AutoArray< uint32_t , 8 > starts;	// Position of chunk in source file
 		T_AutoArray< uint32_t , 8 > counts;	// Chunk lengths
-		T_AutoArray< T_String , 8 > sources;	// Chunk source files
+		T_AutoArray< T_FSPath , 8 > sources;	// Chunk source files
 		T_StringBuilder code;
 		T_Array< T_ShaderError > errors;
-		T_KeyValueTable< T_String , bool > files;
+		T_KeyValueTable< T_FSPath , bool > files;
 	};
 
 	T_ShaderManager( ) noexcept;
 
 	// Build / get a program based on its name
-	T_ShaderProgram program( T_String const& name );
+	T_ShaderProgram program( T_FSPath const& name );
 	// Build a program from its source code
 	T_ShaderProgram program( T_String const& name ,
 			E_ShaderType type ,
@@ -112,7 +112,7 @@ struct T_ShaderManager
 
 	struct T_Program_
 	{
-		T_String name;
+		T_FSPath name;
 		T_Array< T_String > plReferences;
 		uint32_t saReferences{ 0 };
 		T_ShaderCode code;
@@ -122,43 +122,43 @@ struct T_ShaderManager
 
 	bool uiEnabled_ = false;
 
-	T_ObjectTable< T_String , T_Pipeline_ > pipelines_;
+	T_ObjectTable< T_FSPath , T_Pipeline_ > pipelines_;
 
 	T_Array< T_Program_ > programs_;
-	T_KeyValueTable< T_String , uint32_t > programIndex_;
+	T_KeyValueTable< T_FSPath , uint32_t > programIndex_;
 
-	T_KeyValueTable< T_String , P_ShaderInput > inputs_;
+	T_KeyValueTable< T_FSPath , P_ShaderInput > inputs_;
 
-	T_KeyValueTable< T_String , T_Array< T_String > > missing_;
-	T_Array< T_String > updates_;
+	T_KeyValueTable< T_FSPath , T_Array< T_FSPath > > missing_;
+	T_Array< T_FSPath > updates_;
 
 	T_String cPipeline_{ };
 
 	// Load/use existing program for use with pipelines
 	void loadProgram(
 			T_String const& pipeline ,
-			T_String const& name );
+			T_FSPath const& name );
 	bool useExistingProgram(
 			T_String const& pipeline ,
-			T_String const& name );
+			T_FSPath const& name );
 
 	// Load/use existing program for standalone use
-	void loadProgram( T_String const& name );
+	void loadProgram( T_FSPath const& name );
 	void loadBuiltinProgram(
 			T_String const& name ,
 			E_ShaderType type ,
 			char const* source );
-	bool useExistingProgram( T_String const& name );
+	bool useExistingProgram( T_FSPath const& name );
 
 	// Program management
 	T_Program_& initProgramRecord(				// Init management data
-			T_String const& record ,
+			T_FSPath const& record ,
 			E_ShaderType type = E_ShaderType::__COUNT__ ,
 			char const* source = nullptr );
 	uint32_t newProgramRecord( );				// Allocate entry in index
 
 	T_ShaderInput const* getInput(
-			T_String const& name );
+			T_FSPath const& name );
 
 	void dereferencePipeline( T_String const& id );
 	void dereferenceProgram(
@@ -178,6 +178,6 @@ struct T_ShaderManager
 			T_ShaderCode& code ,
 			char const* errorLine );
 
-	void programUpdated( T_String const& name );
+	void programUpdated( T_FSPath const& name );
 	void resetProgram( T_Program_& program );
 };