Made built-in identifiers properly constant in shaders. Fixes #14449, closes #14629

3 files changed, 161 insertions, 86 deletions

diff --git a/servers/visual/shader_language.cpp b/servers/visual/shader_language.cpp
index e10a57c571..c69bbb9343 100644
--- a/servers/visual/shader_language.cpp
+++ b/servers/visual/shader_language.cpp
@@ -755,12 +755,12 @@ void ShaderLanguage::clear() {
 	}
 }
 
-bool ShaderLanguage::_find_identifier(const BlockNode *p_block, const Map<StringName, DataType> &p_builtin_types, const StringName &p_identifier, DataType *r_data_type, IdentifierType *r_type) {
+bool ShaderLanguage::_find_identifier(const BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types, const StringName &p_identifier, DataType *r_data_type, IdentifierType *r_type) {
 
 	if (p_builtin_types.has(p_identifier)) {
 
 		if (r_data_type) {
-			*r_data_type = p_builtin_types[p_identifier];
+			*r_data_type = p_builtin_types[p_identifier].type;
 		}
 		if (r_type) {
 			*r_type = IDENTIFIER_BUILTIN_VAR;
@@ -2008,7 +2008,7 @@ bool ShaderLanguage::_validate_function_call(BlockNode *p_block, OperatorNode *p
 	return false;
 }
 
-bool ShaderLanguage::_parse_function_arguments(BlockNode *p_block, const Map<StringName, DataType> &p_builtin_types, OperatorNode *p_func, int *r_complete_arg) {
+bool ShaderLanguage::_parse_function_arguments(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types, OperatorNode *p_func, int *r_complete_arg) {
 
 	TkPos pos = _get_tkpos();
 	Token tk = _get_token();
@@ -2261,7 +2261,48 @@ bool ShaderLanguage::_get_completable_identifier(BlockNode *p_block, CompletionT
 	return false;
 }
 
-ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, const Map<StringName, DataType> &p_builtin_types) {
+bool ShaderLanguage::_is_operator_assign(Operator p_op) const {
+	switch (p_op) {
+		case OP_ASSIGN:
+		case OP_ASSIGN_ADD:
+		case OP_ASSIGN_SUB:
+		case OP_ASSIGN_MUL:
+		case OP_ASSIGN_DIV:
+		case OP_ASSIGN_MOD:
+		case OP_ASSIGN_SHIFT_LEFT:
+		case OP_ASSIGN_SHIFT_RIGHT:
+		case OP_ASSIGN_BIT_AND:
+		case OP_ASSIGN_BIT_OR:
+		case OP_ASSIGN_BIT_XOR:
+			return true;
+		default:
+			return false;
+	}
+
+	return false;
+}
+
+bool ShaderLanguage::_validate_assign(Node *p_node, const Map<StringName, BuiltInInfo> &p_builtin_types) {
+
+	if (p_node->type == Node::TYPE_OPERATOR) {
+
+		OperatorNode *op = static_cast<OperatorNode *>(p_node);
+		if (op->type == OP_INDEX) {
+			return _validate_assign(op->arguments[0], p_builtin_types);
+		}
+	}
+
+	if (p_node->type == Node::TYPE_VARIABLE) {
+
+		VariableNode *var = static_cast<VariableNode *>(p_node);
+		if (p_builtin_types.has(var->name) && p_builtin_types[var->name].constant) {
+			return false; //ops not valid
+		}
+	}
+	return true;
+}
+
+ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types) {
 
 	Vector<Expression> expression;
 	//Vector<TokenType> operators;
@@ -2765,6 +2806,11 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
 					_set_error("Invalid base type for increment/decrement operator");
 					return NULL;
 				}
+
+				if (!_validate_assign(expr, p_builtin_types)) {
+					_set_error("Invalid use of increment/decrement operator in constant expression.");
+					return NULL;
+				}
 				expr = op;
 			} else {
 
@@ -2948,6 +2994,11 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
 
 				OperatorNode *op = alloc_node<OperatorNode>();
 				op->op = expression[i].op;
+				if ((op->op == OP_INCREMENT || op->op == OP_DECREMENT) && !_validate_assign(expression[i + 1].node, p_builtin_types)) {
+
+					_set_error("Can't use increment/decrement operator in constant expression.");
+					return NULL;
+				}
 				op->arguments.push_back(expression[i + 1].node);
 
 				expression[i].is_op = false;
@@ -3019,6 +3070,12 @@ ShaderLanguage::Node *ShaderLanguage::_parse_expression(BlockNode *p_block, cons
 				ERR_FAIL_V(NULL);
 			}
 
+			if (_is_operator_assign(op->op) && !_validate_assign(expression[next_op - 1].node, p_builtin_types)) {
+
+				_set_error("Assignment to constant expression.");
+				return NULL;
+			}
+
 			if (expression[next_op + 1].is_op) {
 				// this is not invalid and can really appear
 				// but it becomes invalid anyway because no binary op
@@ -3142,7 +3199,7 @@ ShaderLanguage::Node *ShaderLanguage::_reduce_expression(BlockNode *p_block, Sha
 	return p_node;
 }
 
-ShaderLanguage::Node *ShaderLanguage::_parse_and_reduce_expression(BlockNode *p_block, const Map<StringName, DataType> &p_builtin_types) {
+ShaderLanguage::Node *ShaderLanguage::_parse_and_reduce_expression(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types) {
 
 	ShaderLanguage::Node *expr = _parse_expression(p_block, p_builtin_types);
 	if (!expr) //errored
@@ -3153,7 +3210,7 @@ ShaderLanguage::Node *ShaderLanguage::_parse_and_reduce_expression(BlockNode *p_
 	return expr;
 }
 
-Error ShaderLanguage::_parse_block(BlockNode *p_block, const Map<StringName, DataType> &p_builtin_types, bool p_just_one, bool p_can_break, bool p_can_continue) {
+Error ShaderLanguage::_parse_block(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types, bool p_just_one, bool p_can_break, bool p_can_continue) {
 
 	while (true) {
 
@@ -3636,7 +3693,7 @@ Error ShaderLanguage::_parse_shader(const Map<StringName, FunctionInfo> &p_funct
 
 				name = tk.text;
 
-				if (_find_identifier(NULL, Map<StringName, DataType>(), name)) {
+				if (_find_identifier(NULL, Map<StringName, BuiltInInfo>(), name)) {
 					_set_error("Redefinition of '" + String(name) + "'");
 					return ERR_PARSE_ERROR;
 				}
@@ -3660,7 +3717,7 @@ Error ShaderLanguage::_parse_shader(const Map<StringName, FunctionInfo> &p_funct
 					tk = _get_token();
 					if (tk.type == TK_OP_ASSIGN) {
 
-						Node *expr = _parse_and_reduce_expression(NULL, Map<StringName, DataType>());
+						Node *expr = _parse_and_reduce_expression(NULL, Map<StringName, BuiltInInfo>());
 						if (!expr)
 							return ERR_PARSE_ERROR;
 						if (expr->type != Node::TYPE_CONSTANT) {
@@ -3841,7 +3898,7 @@ Error ShaderLanguage::_parse_shader(const Map<StringName, FunctionInfo> &p_funct
 					return ERR_PARSE_ERROR;
 				}
 
-				if (_find_identifier(NULL, Map<StringName, DataType>(), name)) {
+				if (_find_identifier(NULL, Map<StringName, BuiltInInfo>(), name)) {
 					_set_error("Redefinition of '" + String(name) + "'");
 					return ERR_PARSE_ERROR;
 				}
@@ -3852,7 +3909,7 @@ Error ShaderLanguage::_parse_shader(const Map<StringName, FunctionInfo> &p_funct
 					return ERR_PARSE_ERROR;
 				}
 
-				Map<StringName, DataType> builtin_types;
+				Map<StringName, BuiltInInfo> builtin_types;
 				if (p_functions.has(name)) {
 					builtin_types = p_functions[name].built_ins;
 				}
@@ -4109,7 +4166,7 @@ Error ShaderLanguage::complete(const String &p_code, const Map<StringName, Funct
 
 			if (comp_ident && skip_function != StringName() && p_functions.has(skip_function)) {
 
-				for (Map<StringName, DataType>::Element *E = p_functions[skip_function].built_ins.front(); E; E = E->next()) {
+				for (Map<StringName, BuiltInInfo>::Element *E = p_functions[skip_function].built_ins.front(); E; E = E->next()) {
 					matches.insert(E->key());
 				}
 			}
diff --git a/servers/visual/shader_language.h b/servers/visual/shader_language.h
index e092bf931f..4cf8560990 100644
--- a/servers/visual/shader_language.h
+++ b/servers/visual/shader_language.h
@@ -537,8 +537,18 @@ public:
 	static void get_keyword_list(List<String> *r_keywords);
 	static void get_builtin_funcs(List<String> *r_keywords);
 
+	struct BuiltInInfo {
+		DataType type;
+		bool constant;
+		BuiltInInfo() {}
+		BuiltInInfo(DataType p_type, bool p_constant = false) {
+			type = p_type;
+			constant = p_constant;
+		}
+	};
+
 	struct FunctionInfo {
-		Map<StringName, DataType> built_ins;
+		Map<StringName, BuiltInInfo> built_ins;
 		bool can_discard;
 	};
 
@@ -601,7 +611,10 @@ private:
 		IDENTIFIER_BUILTIN_VAR,
 	};
 
-	bool _find_identifier(const BlockNode *p_block, const Map<StringName, DataType> &p_builtin_types, const StringName &p_identifier, DataType *r_data_type = NULL, IdentifierType *r_type = NULL);
+	bool _find_identifier(const BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types, const StringName &p_identifier, DataType *r_data_type = NULL, IdentifierType *r_type = NULL);
+
+	bool _is_operator_assign(Operator p_op) const;
+	bool _validate_assign(Node *p_node, const Map<StringName, BuiltInInfo> &p_builtin_types);
 
 	bool _validate_operator(OperatorNode *p_op, DataType *r_ret_type = NULL);
 
@@ -625,14 +638,14 @@ private:
 	static const BuiltinFuncDef builtin_func_defs[];
 	bool _validate_function_call(BlockNode *p_block, OperatorNode *p_func, DataType *r_ret_type);
 
-	bool _parse_function_arguments(BlockNode *p_block, const Map<StringName, DataType> &p_builtin_types, OperatorNode *p_func, int *r_complete_arg = NULL);
+	bool _parse_function_arguments(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types, OperatorNode *p_func, int *r_complete_arg = NULL);
 
-	Node *_parse_expression(BlockNode *p_block, const Map<StringName, DataType> &p_builtin_types);
+	Node *_parse_expression(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types);
 
 	ShaderLanguage::Node *_reduce_expression(BlockNode *p_block, ShaderLanguage::Node *p_node);
-	Node *_parse_and_reduce_expression(BlockNode *p_block, const Map<StringName, DataType> &p_builtin_types);
+	Node *_parse_and_reduce_expression(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types);
 
-	Error _parse_block(BlockNode *p_block, const Map<StringName, DataType> &p_builtin_types, bool p_just_one = false, bool p_can_break = false, bool p_can_continue = false);
+	Error _parse_block(BlockNode *p_block, const Map<StringName, BuiltInInfo> &p_builtin_types, bool p_just_one = false, bool p_can_break = false, bool p_can_continue = false);
 
 	Error _parse_shader(const Map<StringName, FunctionInfo> &p_functions, const Set<String> &p_render_modes, const Set<String> &p_shader_types);
 
diff --git a/servers/visual/shader_types.cpp b/servers/visual/shader_types.cpp
index 7489ca7e3e..a25c5ca65e 100644
--- a/servers/visual/shader_types.cpp
+++ b/servers/visual/shader_types.cpp
@@ -45,6 +45,11 @@ const Set<String> &ShaderTypes::get_types() {
 
 ShaderTypes *ShaderTypes::singleton = NULL;
 
+static ShaderLanguage::BuiltInInfo constt(ShaderLanguage::DataType p_type) {
+
+	return ShaderLanguage::BuiltInInfo(p_type, true);
+}
+
 ShaderTypes::ShaderTypes() {
 	singleton = this;
 
@@ -58,32 +63,32 @@ ShaderTypes::ShaderTypes() {
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["UV2"] = ShaderLanguage::TYPE_VEC2;
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["COLOR"] = ShaderLanguage::TYPE_VEC4;
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["POINT_SIZE"] = ShaderLanguage::TYPE_FLOAT;
-	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["INSTANCE_ID"] = ShaderLanguage::TYPE_INT;
-	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["INSTANCE_CUSTOM"] = ShaderLanguage::TYPE_VEC4;
+	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["INSTANCE_ID"] = constt(ShaderLanguage::TYPE_INT);
+	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["INSTANCE_CUSTOM"] = constt(ShaderLanguage::TYPE_VEC4);
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["ROUGHNESS"] = ShaderLanguage::TYPE_FLOAT;
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].can_discard = false;
 
 	//builtins
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["WORLD_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["INV_CAMERA_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["CAMERA_MATRIX"] = ShaderLanguage::TYPE_MAT4;
+	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["INV_CAMERA_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["CAMERA_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["PROJECTION_MATRIX"] = ShaderLanguage::TYPE_MAT4;
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["MODELVIEW_MATRIX"] = ShaderLanguage::TYPE_MAT4;
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["INV_PROJECTION_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["TIME"] = ShaderLanguage::TYPE_FLOAT;
-	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["VIEWPORT_SIZE"] = ShaderLanguage::TYPE_VEC2;
+	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["TIME"] = constt(ShaderLanguage::TYPE_FLOAT);
+	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["VIEWPORT_SIZE"] = constt(ShaderLanguage::TYPE_VEC2);
 
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["VERTEX"] = ShaderLanguage::TYPE_VEC3;
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["FRAGCOORD"] = ShaderLanguage::TYPE_VEC4;
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["FRONT_FACING"] = ShaderLanguage::TYPE_BOOL;
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["VERTEX"] = constt(ShaderLanguage::TYPE_VEC3);
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["FRAGCOORD"] = constt(ShaderLanguage::TYPE_VEC4);
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["FRONT_FACING"] = constt(ShaderLanguage::TYPE_BOOL);
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["NORMAL"] = ShaderLanguage::TYPE_VEC3;
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["TANGENT"] = ShaderLanguage::TYPE_VEC3;
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["BINORMAL"] = ShaderLanguage::TYPE_VEC3;
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["NORMALMAP"] = ShaderLanguage::TYPE_VEC3;
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["NORMALMAP_DEPTH"] = ShaderLanguage::TYPE_FLOAT;
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["UV"] = ShaderLanguage::TYPE_VEC2;
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["UV2"] = ShaderLanguage::TYPE_VEC2;
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["COLOR"] = ShaderLanguage::TYPE_VEC4;
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["UV"] = constt(ShaderLanguage::TYPE_VEC2);
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["UV2"] = constt(ShaderLanguage::TYPE_VEC2);
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["COLOR"] = constt(ShaderLanguage::TYPE_VEC4);
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["ALBEDO"] = ShaderLanguage::TYPE_VEC3;
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["ALPHA"] = ShaderLanguage::TYPE_FLOAT;
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["METALLIC"] = ShaderLanguage::TYPE_FLOAT;
@@ -103,33 +108,33 @@ ShaderTypes::ShaderTypes() {
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["SCREEN_TEXTURE"] = ShaderLanguage::TYPE_SAMPLER2D;
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["DEPTH_TEXTURE"] = ShaderLanguage::TYPE_SAMPLER2D;
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["SCREEN_UV"] = ShaderLanguage::TYPE_VEC2;
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["POINT_COORD"] = ShaderLanguage::TYPE_VEC2;
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["SIDE"] = ShaderLanguage::TYPE_FLOAT;
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["POINT_COORD"] = constt(ShaderLanguage::TYPE_VEC2);
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["SIDE"] = constt(ShaderLanguage::TYPE_FLOAT);
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["ALPHA_SCISSOR"] = ShaderLanguage::TYPE_FLOAT;
 
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["WORLD_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["INV_CAMERA_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["PROJECTION_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["INV_PROJECTION_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["TIME"] = ShaderLanguage::TYPE_FLOAT;
-	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["VIEWPORT_SIZE"] = ShaderLanguage::TYPE_VEC2;
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["WORLD_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["INV_CAMERA_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["PROJECTION_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["INV_PROJECTION_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["TIME"] = constt(ShaderLanguage::TYPE_FLOAT);
+	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].built_ins["VIEWPORT_SIZE"] = constt(ShaderLanguage::TYPE_VEC2);
 	shader_modes[VS::SHADER_SPATIAL].functions["fragment"].can_discard = true;
 
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["WORLD_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["INV_CAMERA_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["PROJECTION_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["INV_PROJECTION_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["TIME"] = ShaderLanguage::TYPE_FLOAT;
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["VIEWPORT_SIZE"] = ShaderLanguage::TYPE_VEC2;
-
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["NORMAL"] = ShaderLanguage::TYPE_VEC3;
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["VIEW"] = ShaderLanguage::TYPE_VEC3;
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["LIGHT"] = ShaderLanguage::TYPE_VEC3;
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["LIGHT_COLOR"] = ShaderLanguage::TYPE_VEC3;
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["ATTENUATION"] = ShaderLanguage::TYPE_VEC3;
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["ALBEDO"] = ShaderLanguage::TYPE_VEC3;
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["TRANSMISSION"] = ShaderLanguage::TYPE_VEC3;
-	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["ROUGHNESS"] = ShaderLanguage::TYPE_FLOAT;
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["WORLD_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["INV_CAMERA_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["PROJECTION_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["INV_PROJECTION_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["TIME"] = constt(ShaderLanguage::TYPE_FLOAT);
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["VIEWPORT_SIZE"] = constt(ShaderLanguage::TYPE_VEC2);
+
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["NORMAL"] = constt(ShaderLanguage::TYPE_VEC3);
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["VIEW"] = constt(ShaderLanguage::TYPE_VEC3);
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["LIGHT"] = constt(ShaderLanguage::TYPE_VEC3);
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["LIGHT_COLOR"] = constt(ShaderLanguage::TYPE_VEC3);
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["ATTENUATION"] = constt(ShaderLanguage::TYPE_VEC3);
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["ALBEDO"] = constt(ShaderLanguage::TYPE_VEC3);
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["TRANSMISSION"] = constt(ShaderLanguage::TYPE_VEC3);
+	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["ROUGHNESS"] = constt(ShaderLanguage::TYPE_FLOAT);
 	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["DIFFUSE_LIGHT"] = ShaderLanguage::TYPE_VEC3;
 	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["SPECULAR_LIGHT"] = ShaderLanguage::TYPE_VEC3;
 
@@ -177,38 +182,38 @@ ShaderTypes::ShaderTypes() {
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["COLOR"] = ShaderLanguage::TYPE_VEC4;
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["POINT_SIZE"] = ShaderLanguage::TYPE_FLOAT;
 
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["WORLD_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["PROJECTION_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["EXTRA_MATRIX"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["TIME"] = ShaderLanguage::TYPE_FLOAT;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["INSTANCE_CUSTOM"] = ShaderLanguage::TYPE_VEC4;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["AT_LIGHT_PASS"] = ShaderLanguage::TYPE_BOOL;
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["WORLD_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["PROJECTION_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["EXTRA_MATRIX"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["TIME"] = constt(ShaderLanguage::TYPE_FLOAT);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["INSTANCE_CUSTOM"] = constt(ShaderLanguage::TYPE_VEC4);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["AT_LIGHT_PASS"] = constt(ShaderLanguage::TYPE_BOOL);
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].can_discard = false;
 
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["FRAGCOORD"] = ShaderLanguage::TYPE_VEC4;
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["FRAGCOORD"] = constt(ShaderLanguage::TYPE_VEC4);
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["NORMAL"] = ShaderLanguage::TYPE_VEC3;
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["NORMALMAP"] = ShaderLanguage::TYPE_VEC3;
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["NORMALMAP_DEPTH"] = ShaderLanguage::TYPE_FLOAT;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["UV"] = ShaderLanguage::TYPE_VEC2;
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["UV"] = constt(ShaderLanguage::TYPE_VEC2);
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["COLOR"] = ShaderLanguage::TYPE_VEC4;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["TEXTURE"] = ShaderLanguage::TYPE_SAMPLER2D;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["TEXTURE_PIXEL_SIZE"] = ShaderLanguage::TYPE_VEC2;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["NORMAL_TEXTURE"] = ShaderLanguage::TYPE_SAMPLER2D;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["SCREEN_UV"] = ShaderLanguage::TYPE_VEC2;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["SCREEN_PIXEL_SIZE"] = ShaderLanguage::TYPE_VEC2;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["POINT_COORD"] = ShaderLanguage::TYPE_VEC2;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["TIME"] = ShaderLanguage::TYPE_FLOAT;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["AT_LIGHT_PASS"] = ShaderLanguage::TYPE_BOOL;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["SCREEN_TEXTURE"] = ShaderLanguage::TYPE_SAMPLER2D;
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["TEXTURE"] = constt(ShaderLanguage::TYPE_SAMPLER2D);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["TEXTURE_PIXEL_SIZE"] = constt(ShaderLanguage::TYPE_VEC2);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["NORMAL_TEXTURE"] = constt(ShaderLanguage::TYPE_SAMPLER2D);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["SCREEN_UV"] = constt(ShaderLanguage::TYPE_VEC2);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["SCREEN_PIXEL_SIZE"] = constt(ShaderLanguage::TYPE_VEC2);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["POINT_COORD"] = constt(ShaderLanguage::TYPE_VEC2);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["TIME"] = constt(ShaderLanguage::TYPE_FLOAT);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["AT_LIGHT_PASS"] = constt(ShaderLanguage::TYPE_BOOL);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["SCREEN_TEXTURE"] = constt(ShaderLanguage::TYPE_SAMPLER2D);
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].can_discard = true;
 
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["POSITION"] = ShaderLanguage::TYPE_VEC2;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["NORMAL"] = ShaderLanguage::TYPE_VEC3;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["UV"] = ShaderLanguage::TYPE_VEC2;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["COLOR"] = ShaderLanguage::TYPE_VEC4;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["TEXTURE"] = ShaderLanguage::TYPE_SAMPLER2D;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["TEXTURE_PIXEL_SIZE"] = ShaderLanguage::TYPE_VEC2;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["SCREEN_UV"] = ShaderLanguage::TYPE_VEC2;
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["POSITION"] = constt(ShaderLanguage::TYPE_VEC2);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["NORMAL"] = constt(ShaderLanguage::TYPE_VEC3);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["UV"] = constt(ShaderLanguage::TYPE_VEC2);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["COLOR"] = constt(ShaderLanguage::TYPE_VEC4);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["TEXTURE"] = constt(ShaderLanguage::TYPE_SAMPLER2D);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["TEXTURE_PIXEL_SIZE"] = constt(ShaderLanguage::TYPE_VEC2);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["SCREEN_UV"] = constt(ShaderLanguage::TYPE_VEC2);
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["LIGHT_VEC"] = ShaderLanguage::TYPE_VEC2;
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["LIGHT_HEIGHT"] = ShaderLanguage::TYPE_FLOAT;
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["LIGHT_COLOR"] = ShaderLanguage::TYPE_VEC4;
@@ -216,8 +221,8 @@ ShaderTypes::ShaderTypes() {
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["LIGHT_SHADOW"] = ShaderLanguage::TYPE_VEC4;
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["LIGHT"] = ShaderLanguage::TYPE_VEC4;
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["SHADOW"] = ShaderLanguage::TYPE_VEC4;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["POINT_COORD"] = ShaderLanguage::TYPE_VEC2;
-	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["TIME"] = ShaderLanguage::TYPE_FLOAT;
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["POINT_COORD"] = constt(ShaderLanguage::TYPE_VEC2);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].built_ins["TIME"] = constt(ShaderLanguage::TYPE_FLOAT);
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["light"].can_discard = true;
 
 	shader_modes[VS::SHADER_CANVAS_ITEM].modes.insert("skip_vertex_transform");
@@ -237,16 +242,16 @@ ShaderTypes::ShaderTypes() {
 	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["VELOCITY"] = ShaderLanguage::TYPE_VEC3;
 	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["MASS"] = ShaderLanguage::TYPE_FLOAT;
 	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["ACTIVE"] = ShaderLanguage::TYPE_BOOL;
-	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["RESTART"] = ShaderLanguage::TYPE_BOOL;
+	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["RESTART"] = constt(ShaderLanguage::TYPE_BOOL);
 	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["CUSTOM"] = ShaderLanguage::TYPE_VEC4;
 	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["TRANSFORM"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["TIME"] = ShaderLanguage::TYPE_FLOAT;
-	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["LIFETIME"] = ShaderLanguage::TYPE_FLOAT;
-	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["DELTA"] = ShaderLanguage::TYPE_FLOAT;
-	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["NUMBER"] = ShaderLanguage::TYPE_UINT;
-	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["INDEX"] = ShaderLanguage::TYPE_INT;
-	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["EMISSION_TRANSFORM"] = ShaderLanguage::TYPE_MAT4;
-	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["RANDOM_SEED"] = ShaderLanguage::TYPE_UINT;
+	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["TIME"] = constt(ShaderLanguage::TYPE_FLOAT);
+	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["LIFETIME"] = constt(ShaderLanguage::TYPE_FLOAT);
+	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["DELTA"] = constt(ShaderLanguage::TYPE_FLOAT);
+	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["NUMBER"] = constt(ShaderLanguage::TYPE_UINT);
+	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["INDEX"] = constt(ShaderLanguage::TYPE_INT);
+	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["EMISSION_TRANSFORM"] = constt(ShaderLanguage::TYPE_MAT4);
+	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].built_ins["RANDOM_SEED"] = constt(ShaderLanguage::TYPE_UINT);
 	shader_modes[VS::SHADER_PARTICLES].functions["vertex"].can_discard = false;
 
 	shader_modes[VS::SHADER_PARTICLES].modes.insert("billboard");