Merge pull request #55656 from clayjohn/GLSL3-compiler

1 files changed, 1552 insertions, 0 deletions

diff --git a/servers/rendering/shader_compiler.cpp b/servers/rendering/shader_compiler.cpp
new file mode 100644
index 0000000000..79749dc66c
--- /dev/null
+++ b/servers/rendering/shader_compiler.cpp
@@ -0,0 +1,1552 @@
+/*************************************************************************/
+/*  shader_compiler.cpp                                                  */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#include "shader_compiler.h"
+
+#include "core/config/project_settings.h"
+#include "core/os/os.h"
+#include "servers/rendering_server.h"
+
+#define SL ShaderLanguage
+
+static String _mktab(int p_level) {
+	String tb;
+	for (int i = 0; i < p_level; i++) {
+		tb += "\t";
+	}
+
+	return tb;
+}
+
+static String _typestr(SL::DataType p_type) {
+	String type = ShaderLanguage::get_datatype_name(p_type);
+	if (ShaderLanguage::is_sampler_type(p_type)) {
+		type = type.replace("sampler", "texture"); //we use textures instead of samplers
+	}
+	return type;
+}
+
+static int _get_datatype_alignment(SL::DataType p_type) {
+	switch (p_type) {
+		case SL::TYPE_VOID:
+			return 0;
+		case SL::TYPE_BOOL:
+			return 4;
+		case SL::TYPE_BVEC2:
+			return 8;
+		case SL::TYPE_BVEC3:
+			return 16;
+		case SL::TYPE_BVEC4:
+			return 16;
+		case SL::TYPE_INT:
+			return 4;
+		case SL::TYPE_IVEC2:
+			return 8;
+		case SL::TYPE_IVEC3:
+			return 16;
+		case SL::TYPE_IVEC4:
+			return 16;
+		case SL::TYPE_UINT:
+			return 4;
+		case SL::TYPE_UVEC2:
+			return 8;
+		case SL::TYPE_UVEC3:
+			return 16;
+		case SL::TYPE_UVEC4:
+			return 16;
+		case SL::TYPE_FLOAT:
+			return 4;
+		case SL::TYPE_VEC2:
+			return 8;
+		case SL::TYPE_VEC3:
+			return 16;
+		case SL::TYPE_VEC4:
+			return 16;
+		case SL::TYPE_MAT2:
+			return 16;
+		case SL::TYPE_MAT3:
+			return 16;
+		case SL::TYPE_MAT4:
+			return 16;
+		case SL::TYPE_SAMPLER2D:
+			return 16;
+		case SL::TYPE_ISAMPLER2D:
+			return 16;
+		case SL::TYPE_USAMPLER2D:
+			return 16;
+		case SL::TYPE_SAMPLER2DARRAY:
+			return 16;
+		case SL::TYPE_ISAMPLER2DARRAY:
+			return 16;
+		case SL::TYPE_USAMPLER2DARRAY:
+			return 16;
+		case SL::TYPE_SAMPLER3D:
+			return 16;
+		case SL::TYPE_ISAMPLER3D:
+			return 16;
+		case SL::TYPE_USAMPLER3D:
+			return 16;
+		case SL::TYPE_SAMPLERCUBE:
+			return 16;
+		case SL::TYPE_SAMPLERCUBEARRAY:
+			return 16;
+		case SL::TYPE_STRUCT:
+			return 0;
+		case SL::TYPE_MAX: {
+			ERR_FAIL_V(0);
+		}
+	}
+
+	ERR_FAIL_V(0);
+}
+
+static String _interpstr(SL::DataInterpolation p_interp) {
+	switch (p_interp) {
+		case SL::INTERPOLATION_FLAT:
+			return "flat ";
+		case SL::INTERPOLATION_SMOOTH:
+			return "";
+	}
+	return "";
+}
+
+static String _prestr(SL::DataPrecision p_pres, bool p_force_highp = false) {
+	switch (p_pres) {
+		case SL::PRECISION_LOWP:
+			return "lowp ";
+		case SL::PRECISION_MEDIUMP:
+			return "mediump ";
+		case SL::PRECISION_HIGHP:
+			return "highp ";
+		case SL::PRECISION_DEFAULT:
+			return p_force_highp ? "highp " : "";
+	}
+	return "";
+}
+
+static String _constr(bool p_is_const) {
+	if (p_is_const) {
+		return "const ";
+	}
+	return "";
+}
+
+static String _qualstr(SL::ArgumentQualifier p_qual) {
+	switch (p_qual) {
+		case SL::ARGUMENT_QUALIFIER_IN:
+			return "";
+		case SL::ARGUMENT_QUALIFIER_OUT:
+			return "out ";
+		case SL::ARGUMENT_QUALIFIER_INOUT:
+			return "inout ";
+	}
+	return "";
+}
+
+static String _opstr(SL::Operator p_op) {
+	return SL::get_operator_text(p_op);
+}
+
+static String _mkid(const String &p_id) {
+	String id = "m_" + p_id.replace("__", "_dus_");
+	return id.replace("__", "_dus_"); //doubleunderscore is reserved in glsl
+}
+
+static String f2sp0(float p_float) {
+	String num = rtoss(p_float);
+	if (num.find(".") == -1 && num.find("e") == -1) {
+		num += ".0";
+	}
+	return num;
+}
+
+static String get_constant_text(SL::DataType p_type, const Vector<SL::ConstantNode::Value> &p_values) {
+	switch (p_type) {
+		case SL::TYPE_BOOL:
+			return p_values[0].boolean ? "true" : "false";
+		case SL::TYPE_BVEC2:
+		case SL::TYPE_BVEC3:
+		case SL::TYPE_BVEC4: {
+			String text = "bvec" + itos(p_type - SL::TYPE_BOOL + 1) + "(";
+			for (int i = 0; i < p_values.size(); i++) {
+				if (i > 0) {
+					text += ",";
+				}
+
+				text += p_values[i].boolean ? "true" : "false";
+			}
+			text += ")";
+			return text;
+		}
+
+		case SL::TYPE_INT:
+			return itos(p_values[0].sint);
+		case SL::TYPE_IVEC2:
+		case SL::TYPE_IVEC3:
+		case SL::TYPE_IVEC4: {
+			String text = "ivec" + itos(p_type - SL::TYPE_INT + 1) + "(";
+			for (int i = 0; i < p_values.size(); i++) {
+				if (i > 0) {
+					text += ",";
+				}
+
+				text += itos(p_values[i].sint);
+			}
+			text += ")";
+			return text;
+
+		} break;
+		case SL::TYPE_UINT:
+			return itos(p_values[0].uint) + "u";
+		case SL::TYPE_UVEC2:
+		case SL::TYPE_UVEC3:
+		case SL::TYPE_UVEC4: {
+			String text = "uvec" + itos(p_type - SL::TYPE_UINT + 1) + "(";
+			for (int i = 0; i < p_values.size(); i++) {
+				if (i > 0) {
+					text += ",";
+				}
+
+				text += itos(p_values[i].uint) + "u";
+			}
+			text += ")";
+			return text;
+		} break;
+		case SL::TYPE_FLOAT:
+			return f2sp0(p_values[0].real);
+		case SL::TYPE_VEC2:
+		case SL::TYPE_VEC3:
+		case SL::TYPE_VEC4: {
+			String text = "vec" + itos(p_type - SL::TYPE_FLOAT + 1) + "(";
+			for (int i = 0; i < p_values.size(); i++) {
+				if (i > 0) {
+					text += ",";
+				}
+
+				text += f2sp0(p_values[i].real);
+			}
+			text += ")";
+			return text;
+
+		} break;
+		case SL::TYPE_MAT2:
+		case SL::TYPE_MAT3:
+		case SL::TYPE_MAT4: {
+			String text = "mat" + itos(p_type - SL::TYPE_MAT2 + 2) + "(";
+			for (int i = 0; i < p_values.size(); i++) {
+				if (i > 0) {
+					text += ",";
+				}
+
+				text += f2sp0(p_values[i].real);
+			}
+			text += ")";
+			return text;
+
+		} break;
+		default:
+			ERR_FAIL_V(String());
+	}
+}
+
+String ShaderCompiler::_get_sampler_name(ShaderLanguage::TextureFilter p_filter, ShaderLanguage::TextureRepeat p_repeat) {
+	if (p_filter == ShaderLanguage::FILTER_DEFAULT) {
+		ERR_FAIL_COND_V(actions.default_filter == ShaderLanguage::FILTER_DEFAULT, String());
+		p_filter = actions.default_filter;
+	}
+	if (p_repeat == ShaderLanguage::REPEAT_DEFAULT) {
+		ERR_FAIL_COND_V(actions.default_repeat == ShaderLanguage::REPEAT_DEFAULT, String());
+		p_repeat = actions.default_repeat;
+	}
+	return actions.sampler_array_name + "[" + itos(p_filter + (p_repeat == ShaderLanguage::REPEAT_ENABLE ? ShaderLanguage::FILTER_DEFAULT : 0)) + "]";
+}
+
+void ShaderCompiler::_dump_function_deps(const SL::ShaderNode *p_node, const StringName &p_for_func, const Map<StringName, String> &p_func_code, String &r_to_add, Set<StringName> &added) {
+	int fidx = -1;
+
+	for (int i = 0; i < p_node->functions.size(); i++) {
+		if (p_node->functions[i].name == p_for_func) {
+			fidx = i;
+			break;
+		}
+	}
+
+	ERR_FAIL_COND(fidx == -1);
+
+	Vector<StringName> uses_functions;
+
+	for (Set<StringName>::Element *E = p_node->functions[fidx].uses_function.front(); E; E = E->next()) {
+		uses_functions.push_back(E->get());
+	}
+	uses_functions.sort_custom<StringName::AlphCompare>(); //ensure order is deterministic so the same shader is always produced
+
+	for (int k = 0; k < uses_functions.size(); k++) {
+		if (added.has(uses_functions[k])) {
+			continue; //was added already
+		}
+
+		_dump_function_deps(p_node, uses_functions[k], p_func_code, r_to_add, added);
+
+		SL::FunctionNode *fnode = nullptr;
+
+		for (int i = 0; i < p_node->functions.size(); i++) {
+			if (p_node->functions[i].name == uses_functions[k]) {
+				fnode = p_node->functions[i].function;
+				break;
+			}
+		}
+
+		ERR_FAIL_COND(!fnode);
+
+		r_to_add += "\n";
+
+		String header;
+		if (fnode->return_type == SL::TYPE_STRUCT) {
+			header = _mkid(fnode->return_struct_name);
+		} else {
+			header = _typestr(fnode->return_type);
+		}
+
+		if (fnode->return_array_size > 0) {
+			header += "[";
+			header += itos(fnode->return_array_size);
+			header += "]";
+		}
+
+		header += " ";
+		header += _mkid(fnode->name);
+		header += "(";
+
+		for (int i = 0; i < fnode->arguments.size(); i++) {
+			if (i > 0) {
+				header += ", ";
+			}
+			header += _constr(fnode->arguments[i].is_const);
+			if (fnode->arguments[i].type == SL::TYPE_STRUCT) {
+				header += _qualstr(fnode->arguments[i].qualifier) + _mkid(fnode->arguments[i].type_str) + " " + _mkid(fnode->arguments[i].name);
+			} else {
+				header += _qualstr(fnode->arguments[i].qualifier) + _prestr(fnode->arguments[i].precision) + _typestr(fnode->arguments[i].type) + " " + _mkid(fnode->arguments[i].name);
+			}
+			if (fnode->arguments[i].array_size > 0) {
+				header += "[";
+				header += itos(fnode->arguments[i].array_size);
+				header += "]";
+			}
+		}
+
+		header += ")\n";
+		r_to_add += header;
+		r_to_add += p_func_code[uses_functions[k]];
+
+		added.insert(uses_functions[k]);
+	}
+}
+
+static String _get_global_variable_from_type_and_index(const String &p_buffer, const String &p_index, ShaderLanguage::DataType p_type) {
+	switch (p_type) {
+		case ShaderLanguage::TYPE_BOOL: {
+			return "(" + p_buffer + "[" + p_index + "].x != 0.0)";
+		}
+		case ShaderLanguage::TYPE_BVEC2: {
+			return "(notEqual(" + p_buffer + "[" + p_index + "].xy, vec2(0.0)))";
+		}
+		case ShaderLanguage::TYPE_BVEC3: {
+			return "(notEqual(" + p_buffer + "[" + p_index + "].xyz, vec3(0.0)))";
+		}
+		case ShaderLanguage::TYPE_BVEC4: {
+			return "(notEqual(" + p_buffer + "[" + p_index + "].xyzw, vec4(0.0)))";
+		}
+		case ShaderLanguage::TYPE_INT: {
+			return "floatBitsToInt(" + p_buffer + "[" + p_index + "].x)";
+		}
+		case ShaderLanguage::TYPE_IVEC2: {
+			return "floatBitsToInt(" + p_buffer + "[" + p_index + "].xy)";
+		}
+		case ShaderLanguage::TYPE_IVEC3: {
+			return "floatBitsToInt(" + p_buffer + "[" + p_index + "].xyz)";
+		}
+		case ShaderLanguage::TYPE_IVEC4: {
+			return "floatBitsToInt(" + p_buffer + "[" + p_index + "].xyzw)";
+		}
+		case ShaderLanguage::TYPE_UINT: {
+			return "floatBitsToUint(" + p_buffer + "[" + p_index + "].x)";
+		}
+		case ShaderLanguage::TYPE_UVEC2: {
+			return "floatBitsToUint(" + p_buffer + "[" + p_index + "].xy)";
+		}
+		case ShaderLanguage::TYPE_UVEC3: {
+			return "floatBitsToUint(" + p_buffer + "[" + p_index + "].xyz)";
+		}
+		case ShaderLanguage::TYPE_UVEC4: {
+			return "floatBitsToUint(" + p_buffer + "[" + p_index + "].xyzw)";
+		}
+		case ShaderLanguage::TYPE_FLOAT: {
+			return "(" + p_buffer + "[" + p_index + "].x)";
+		}
+		case ShaderLanguage::TYPE_VEC2: {
+			return "(" + p_buffer + "[" + p_index + "].xy)";
+		}
+		case ShaderLanguage::TYPE_VEC3: {
+			return "(" + p_buffer + "[" + p_index + "].xyz)";
+		}
+		case ShaderLanguage::TYPE_VEC4: {
+			return "(" + p_buffer + "[" + p_index + "].xyzw)";
+		}
+		case ShaderLanguage::TYPE_MAT2: {
+			return "mat2(" + p_buffer + "[" + p_index + "].xy," + p_buffer + "[" + p_index + "+1].xy)";
+		}
+		case ShaderLanguage::TYPE_MAT3: {
+			return "mat3(" + p_buffer + "[" + p_index + "].xyz," + p_buffer + "[" + p_index + "+1].xyz," + p_buffer + "[" + p_index + "+2].xyz)";
+		}
+		case ShaderLanguage::TYPE_MAT4: {
+			return "mat4(" + p_buffer + "[" + p_index + "].xyzw," + p_buffer + "[" + p_index + "+1].xyzw," + p_buffer + "[" + p_index + "+2].xyzw," + p_buffer + "[" + p_index + "+3].xyzw)";
+		}
+		default: {
+			ERR_FAIL_V("void");
+		}
+	}
+}
+
+String ShaderCompiler::_dump_node_code(const SL::Node *p_node, int p_level, GeneratedCode &r_gen_code, IdentifierActions &p_actions, const DefaultIdentifierActions &p_default_actions, bool p_assigning, bool p_use_scope) {
+	String code;
+
+	switch (p_node->type) {
+		case SL::Node::TYPE_SHADER: {
+			SL::ShaderNode *pnode = (SL::ShaderNode *)p_node;
+
+			for (int i = 0; i < pnode->render_modes.size(); i++) {
+				if (p_default_actions.render_mode_defines.has(pnode->render_modes[i]) && !used_rmode_defines.has(pnode->render_modes[i])) {
+					r_gen_code.defines.push_back(p_default_actions.render_mode_defines[pnode->render_modes[i]]);
+					used_rmode_defines.insert(pnode->render_modes[i]);
+				}
+
+				if (p_actions.render_mode_flags.has(pnode->render_modes[i])) {
+					*p_actions.render_mode_flags[pnode->render_modes[i]] = true;
+				}
+
+				if (p_actions.render_mode_values.has(pnode->render_modes[i])) {
+					Pair<int *, int> &p = p_actions.render_mode_values[pnode->render_modes[i]];
+					*p.first = p.second;
+				}
+			}
+
+			// structs
+
+			for (int i = 0; i < pnode->vstructs.size(); i++) {
+				SL::StructNode *st = pnode->vstructs[i].shader_struct;
+				String struct_code;
+
+				struct_code += "struct ";
+				struct_code += _mkid(pnode->vstructs[i].name);
+				struct_code += " ";
+				struct_code += "{\n";
+				for (int j = 0; j < st->members.size(); j++) {
+					SL::MemberNode *m = st->members[j];
+					if (m->datatype == SL::TYPE_STRUCT) {
+						struct_code += _mkid(m->struct_name);
+					} else {
+						struct_code += _prestr(m->precision);
+						struct_code += _typestr(m->datatype);
+					}
+					struct_code += " ";
+					struct_code += m->name;
+					if (m->array_size > 0) {
+						struct_code += "[";
+						struct_code += itos(m->array_size);
+						struct_code += "]";
+					}
+					struct_code += ";\n";
+				}
+				struct_code += "}";
+				struct_code += ";\n";
+
+				for (int j = 0; j < STAGE_MAX; j++) {
+					r_gen_code.stage_globals[j] += struct_code;
+				}
+			}
+
+			int max_texture_uniforms = 0;
+			int max_uniforms = 0;
+
+			for (const KeyValue<StringName, SL::ShaderNode::Uniform> &E : pnode->uniforms) {
+				if (SL::is_sampler_type(E.value.type)) {
+					max_texture_uniforms++;
+				} else {
+					if (E.value.scope == SL::ShaderNode::Uniform::SCOPE_INSTANCE) {
+						continue; // Instances are indexed directly, don't need index uniforms.
+					}
+
+					max_uniforms++;
+				}
+			}
+
+			r_gen_code.texture_uniforms.resize(max_texture_uniforms);
+
+			Vector<int> uniform_sizes;
+			Vector<int> uniform_alignments;
+			Vector<StringName> uniform_defines;
+			uniform_sizes.resize(max_uniforms);
+			uniform_alignments.resize(max_uniforms);
+			uniform_defines.resize(max_uniforms);
+			bool uses_uniforms = false;
+
+			Vector<StringName> uniform_names;
+
+			for (const KeyValue<StringName, SL::ShaderNode::Uniform> &E : pnode->uniforms) {
+				uniform_names.push_back(E.key);
+			}
+
+			uniform_names.sort_custom<StringName::AlphCompare>(); //ensure order is deterministic so the same shader is always produced
+
+			for (int k = 0; k < uniform_names.size(); k++) {
+				StringName uniform_name = uniform_names[k];
+				const SL::ShaderNode::Uniform &uniform = pnode->uniforms[uniform_name];
+
+				String ucode;
+
+				if (uniform.scope == SL::ShaderNode::Uniform::SCOPE_INSTANCE) {
+					//insert, but don't generate any code.
+					p_actions.uniforms->insert(uniform_name, uniform);
+					continue; // Instances are indexed directly, don't need index uniforms.
+				}
+				if (SL::is_sampler_type(uniform.type)) {
+					ucode = "layout(set = " + itos(actions.texture_layout_set) + ", binding = " + itos(actions.base_texture_binding_index + uniform.texture_binding) + ") uniform ";
+				}
+
+				bool is_buffer_global = !SL::is_sampler_type(uniform.type) && uniform.scope == SL::ShaderNode::Uniform::SCOPE_GLOBAL;
+
+				if (is_buffer_global) {
+					//this is an integer to index the global table
+					ucode += _typestr(ShaderLanguage::TYPE_UINT);
+				} else {
+					ucode += _prestr(uniform.precision, ShaderLanguage::is_float_type(uniform.type));
+					ucode += _typestr(uniform.type);
+				}
+
+				ucode += " " + _mkid(uniform_name);
+				if (uniform.array_size > 0) {
+					ucode += "[";
+					ucode += itos(uniform.array_size);
+					ucode += "]";
+				}
+				ucode += ";\n";
+				if (SL::is_sampler_type(uniform.type)) {
+					for (int j = 0; j < STAGE_MAX; j++) {
+						r_gen_code.stage_globals[j] += ucode;
+					}
+
+					GeneratedCode::Texture texture;
+					texture.name = uniform_name;
+					texture.hint = uniform.hint;
+					texture.type = uniform.type;
+					texture.filter = uniform.filter;
+					texture.repeat = uniform.repeat;
+					texture.global = uniform.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_GLOBAL;
+					texture.array_size = uniform.array_size;
+					if (texture.global) {
+						r_gen_code.uses_global_textures = true;
+					}
+
+					r_gen_code.texture_uniforms.write[uniform.texture_order] = texture;
+				} else {
+					if (!uses_uniforms) {
+						uses_uniforms = true;
+					}
+					uniform_defines.write[uniform.order] = ucode;
+					if (is_buffer_global) {
+						//globals are indices into the global table
+						uniform_sizes.write[uniform.order] = ShaderLanguage::get_datatype_size(ShaderLanguage::TYPE_UINT);
+						uniform_alignments.write[uniform.order] = _get_datatype_alignment(ShaderLanguage::TYPE_UINT);
+					} else {
+						// The following code enforces a 16-byte alignment of uniform arrays.
+						if (uniform.array_size > 0) {
+							int size = ShaderLanguage::get_datatype_size(uniform.type) * uniform.array_size;
+							int m = (16 * uniform.array_size);
+							if ((size % m) != 0) {
+								size += m - (size % m);
+							}
+							uniform_sizes.write[uniform.order] = size;
+							uniform_alignments.write[uniform.order] = 16;
+						} else {
+							uniform_sizes.write[uniform.order] = ShaderLanguage::get_datatype_size(uniform.type);
+							uniform_alignments.write[uniform.order] = _get_datatype_alignment(uniform.type);
+						}
+					}
+				}
+
+				p_actions.uniforms->insert(uniform_name, uniform);
+			}
+
+			for (int i = 0; i < max_uniforms; i++) {
+				r_gen_code.uniforms += uniform_defines[i];
+			}
+
+#if 1
+			// add up
+			int offset = 0;
+			for (int i = 0; i < uniform_sizes.size(); i++) {
+				int align = offset % uniform_alignments[i];
+
+				if (align != 0) {
+					offset += uniform_alignments[i] - align;
+				}
+
+				r_gen_code.uniform_offsets.push_back(offset);
+
+				offset += uniform_sizes[i];
+			}
+
+			r_gen_code.uniform_total_size = offset;
+
+			if (r_gen_code.uniform_total_size % 16 != 0) { //UBO sizes must be multiples of 16
+				r_gen_code.uniform_total_size += 16 - (r_gen_code.uniform_total_size % 16);
+			}
+#else
+			// add up
+			for (int i = 0; i < uniform_sizes.size(); i++) {
+				if (i > 0) {
+					int align = uniform_sizes[i - 1] % uniform_alignments[i];
+					if (align != 0) {
+						uniform_sizes[i - 1] += uniform_alignments[i] - align;
+					}
+
+					uniform_sizes[i] = uniform_sizes[i] + uniform_sizes[i - 1];
+				}
+			}
+			//offset
+			r_gen_code.uniform_offsets.resize(uniform_sizes.size());
+			for (int i = 0; i < uniform_sizes.size(); i++) {
+				if (i > 0)
+					r_gen_code.uniform_offsets[i] = uniform_sizes[i - 1];
+				else
+					r_gen_code.uniform_offsets[i] = 0;
+			}
+			/*
+			for(Map<StringName,SL::ShaderNode::Uniform>::Element *E=pnode->uniforms.front();E;E=E->next()) {
+				if (SL::is_sampler_type(E->get().type)) {
+					continue;
+				}
+
+			}
+
+*/
+			if (uniform_sizes.size()) {
+				r_gen_code.uniform_total_size = uniform_sizes[uniform_sizes.size() - 1];
+			} else {
+				r_gen_code.uniform_total_size = 0;
+			}
+#endif
+
+			uint32_t index = p_default_actions.base_varying_index;
+
+			List<Pair<StringName, SL::ShaderNode::Varying>> var_frag_to_light;
+
+			Vector<StringName> varying_names;
+
+			for (const KeyValue<StringName, SL::ShaderNode::Varying> &E : pnode->varyings) {
+				varying_names.push_back(E.key);
+			}
+
+			varying_names.sort_custom<StringName::AlphCompare>(); //ensure order is deterministic so the same shader is always produced
+
+			for (int k = 0; k < varying_names.size(); k++) {
+				StringName varying_name = varying_names[k];
+				const SL::ShaderNode::Varying &varying = pnode->varyings[varying_name];
+
+				if (varying.stage == SL::ShaderNode::Varying::STAGE_FRAGMENT_TO_LIGHT || varying.stage == SL::ShaderNode::Varying::STAGE_FRAGMENT) {
+					var_frag_to_light.push_back(Pair<StringName, SL::ShaderNode::Varying>(varying_name, varying));
+					fragment_varyings.insert(varying_name);
+					continue;
+				}
+
+				String vcode;
+				String interp_mode = _interpstr(varying.interpolation);
+				vcode += _prestr(varying.precision, ShaderLanguage::is_float_type(varying.type));
+				vcode += _typestr(varying.type);
+				vcode += " " + _mkid(varying_name);
+				if (varying.array_size > 0) {
+					vcode += "[";
+					vcode += itos(varying.array_size);
+					vcode += "]";
+				}
+				vcode += ";\n";
+
+				r_gen_code.stage_globals[STAGE_VERTEX] += "layout(location=" + itos(index) + ") " + interp_mode + "out " + vcode;
+				r_gen_code.stage_globals[STAGE_FRAGMENT] += "layout(location=" + itos(index) + ") " + interp_mode + "in " + vcode;
+
+				index++;
+			}
+
+			if (var_frag_to_light.size() > 0) {
+				String gcode = "\n\nstruct {\n";
+				for (const Pair<StringName, SL::ShaderNode::Varying> &E : var_frag_to_light) {
+					gcode += "\t" + _prestr(E.second.precision) + _typestr(E.second.type) + " " + _mkid(E.first);
+					if (E.second.array_size > 0) {
+						gcode += "[";
+						gcode += itos(E.second.array_size);
+						gcode += "]";
+					}
+					gcode += ";\n";
+				}
+				gcode += "} frag_to_light;\n";
+				r_gen_code.stage_globals[STAGE_FRAGMENT] += gcode;
+			}
+
+			for (int i = 0; i < pnode->vconstants.size(); i++) {
+				const SL::ShaderNode::Constant &cnode = pnode->vconstants[i];
+				String gcode;
+				gcode += _constr(true);
+				gcode += _prestr(cnode.precision, ShaderLanguage::is_float_type(cnode.type));
+				if (cnode.type == SL::TYPE_STRUCT) {
+					gcode += _mkid(cnode.type_str);
+				} else {
+					gcode += _typestr(cnode.type);
+				}
+				gcode += " " + _mkid(String(cnode.name));
+				if (cnode.array_size > 0) {
+					gcode += "[";
+					gcode += itos(cnode.array_size);
+					gcode += "]";
+				}
+				gcode += "=";
+				gcode += _dump_node_code(cnode.initializer, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+				gcode += ";\n";
+				for (int j = 0; j < STAGE_MAX; j++) {
+					r_gen_code.stage_globals[j] += gcode;
+				}
+			}
+
+			Map<StringName, String> function_code;
+
+			//code for functions
+			for (int i = 0; i < pnode->functions.size(); i++) {
+				SL::FunctionNode *fnode = pnode->functions[i].function;
+				function = fnode;
+				current_func_name = fnode->name;
+				function_code[fnode->name] = _dump_node_code(fnode->body, p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
+				function = nullptr;
+			}
+
+			//place functions in actual code
+
+			Set<StringName> added_funcs_per_stage[STAGE_MAX];
+
+			for (int i = 0; i < pnode->functions.size(); i++) {
+				SL::FunctionNode *fnode = pnode->functions[i].function;
+
+				function = fnode;
+
+				current_func_name = fnode->name;
+
+				if (p_actions.entry_point_stages.has(fnode->name)) {
+					Stage stage = p_actions.entry_point_stages[fnode->name];
+					_dump_function_deps(pnode, fnode->name, function_code, r_gen_code.stage_globals[stage], added_funcs_per_stage[stage]);
+					r_gen_code.code[fnode->name] = function_code[fnode->name];
+				}
+
+				function = nullptr;
+			}
+
+			//code+=dump_node_code(pnode->body,p_level);
+		} break;
+		case SL::Node::TYPE_STRUCT: {
+		} break;
+		case SL::Node::TYPE_FUNCTION: {
+		} break;
+		case SL::Node::TYPE_BLOCK: {
+			SL::BlockNode *bnode = (SL::BlockNode *)p_node;
+
+			//variables
+			if (!bnode->single_statement) {
+				code += _mktab(p_level - 1) + "{\n";
+			}
+
+			for (int i = 0; i < bnode->statements.size(); i++) {
+				String scode = _dump_node_code(bnode->statements[i], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+
+				if (bnode->statements[i]->type == SL::Node::TYPE_CONTROL_FLOW || bnode->single_statement) {
+					code += scode; //use directly
+				} else {
+					code += _mktab(p_level) + scode + ";\n";
+				}
+			}
+			if (!bnode->single_statement) {
+				code += _mktab(p_level - 1) + "}\n";
+			}
+
+		} break;
+		case SL::Node::TYPE_VARIABLE_DECLARATION: {
+			SL::VariableDeclarationNode *vdnode = (SL::VariableDeclarationNode *)p_node;
+
+			String declaration;
+			declaration += _constr(vdnode->is_const);
+			if (vdnode->datatype == SL::TYPE_STRUCT) {
+				declaration += _mkid(vdnode->struct_name);
+			} else {
+				declaration += _prestr(vdnode->precision) + _typestr(vdnode->datatype);
+			}
+			for (int i = 0; i < vdnode->declarations.size(); i++) {
+				if (i > 0) {
+					declaration += ",";
+				} else {
+					declaration += " ";
+				}
+				declaration += _mkid(vdnode->declarations[i].name);
+				if (vdnode->declarations[i].initializer) {
+					declaration += "=";
+					declaration += _dump_node_code(vdnode->declarations[i].initializer, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+				}
+			}
+
+			code += declaration;
+		} break;
+		case SL::Node::TYPE_VARIABLE: {
+			SL::VariableNode *vnode = (SL::VariableNode *)p_node;
+			bool use_fragment_varying = false;
+
+			if (!vnode->is_local && !(p_actions.entry_point_stages.has(current_func_name) && p_actions.entry_point_stages[current_func_name] == STAGE_VERTEX)) {
+				if (p_assigning) {
+					if (shader->varyings.has(vnode->name)) {
+						use_fragment_varying = true;
+					}
+				} else {
+					if (fragment_varyings.has(vnode->name)) {
+						use_fragment_varying = true;
+					}
+				}
+			}
+
+			if (p_assigning && p_actions.write_flag_pointers.has(vnode->name)) {
+				*p_actions.write_flag_pointers[vnode->name] = true;
+			}
+
+			if (p_default_actions.usage_defines.has(vnode->name) && !used_name_defines.has(vnode->name)) {
+				String define = p_default_actions.usage_defines[vnode->name];
+				if (define.begins_with("@")) {
+					define = p_default_actions.usage_defines[define.substr(1, define.length())];
+				}
+				r_gen_code.defines.push_back(define);
+				used_name_defines.insert(vnode->name);
+			}
+
+			if (p_actions.usage_flag_pointers.has(vnode->name) && !used_flag_pointers.has(vnode->name)) {
+				*p_actions.usage_flag_pointers[vnode->name] = true;
+				used_flag_pointers.insert(vnode->name);
+			}
+
+			if (p_default_actions.renames.has(vnode->name)) {
+				code = p_default_actions.renames[vnode->name];
+			} else {
+				if (shader->uniforms.has(vnode->name)) {
+					//its a uniform!
+					const ShaderLanguage::ShaderNode::Uniform &u = shader->uniforms[vnode->name];
+					if (u.texture_order >= 0) {
+						code = _mkid(vnode->name); //texture, use as is
+					} else {
+						//a scalar or vector
+						if (u.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_GLOBAL) {
+							code = actions.base_uniform_string + _mkid(vnode->name); //texture, use as is
+							//global variable, this means the code points to an index to the global table
+							code = _get_global_variable_from_type_and_index(p_default_actions.global_buffer_array_variable, code, u.type);
+						} else if (u.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_INSTANCE) {
+							//instance variable, index it as such
+							code = "(" + p_default_actions.instance_uniform_index_variable + "+" + itos(u.instance_index) + ")";
+							code = _get_global_variable_from_type_and_index(p_default_actions.global_buffer_array_variable, code, u.type);
+						} else {
+							//regular uniform, index from UBO
+							code = actions.base_uniform_string + _mkid(vnode->name);
+						}
+					}
+
+				} else {
+					if (use_fragment_varying) {
+						code = "frag_to_light.";
+					}
+					code += _mkid(vnode->name); //its something else (local var most likely) use as is
+				}
+			}
+
+			if (vnode->name == time_name) {
+				if (p_actions.entry_point_stages.has(current_func_name) && p_actions.entry_point_stages[current_func_name] == STAGE_VERTEX) {
+					r_gen_code.uses_vertex_time = true;
+				}
+				if (p_actions.entry_point_stages.has(current_func_name) && p_actions.entry_point_stages[current_func_name] == STAGE_FRAGMENT) {
+					r_gen_code.uses_fragment_time = true;
+				}
+			}
+
+		} break;
+		case SL::Node::TYPE_ARRAY_CONSTRUCT: {
+			SL::ArrayConstructNode *acnode = (SL::ArrayConstructNode *)p_node;
+			int sz = acnode->initializer.size();
+			if (acnode->datatype == SL::TYPE_STRUCT) {
+				code += _mkid(acnode->struct_name);
+			} else {
+				code += _typestr(acnode->datatype);
+			}
+			code += "[";
+			code += itos(acnode->initializer.size());
+			code += "]";
+			code += "(";
+			for (int i = 0; i < sz; i++) {
+				code += _dump_node_code(acnode->initializer[i], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+				if (i != sz - 1) {
+					code += ", ";
+				}
+			}
+			code += ")";
+		} break;
+		case SL::Node::TYPE_ARRAY_DECLARATION: {
+			SL::ArrayDeclarationNode *adnode = (SL::ArrayDeclarationNode *)p_node;
+			String declaration;
+			declaration += _constr(adnode->is_const);
+			if (adnode->datatype == SL::TYPE_STRUCT) {
+				declaration += _mkid(adnode->struct_name);
+			} else {
+				declaration += _prestr(adnode->precision) + _typestr(adnode->datatype);
+			}
+			for (int i = 0; i < adnode->declarations.size(); i++) {
+				if (i > 0) {
+					declaration += ",";
+				} else {
+					declaration += " ";
+				}
+				declaration += _mkid(adnode->declarations[i].name);
+				declaration += "[";
+				if (adnode->size_expression != nullptr) {
+					declaration += _dump_node_code(adnode->size_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+				} else {
+					declaration += itos(adnode->declarations[i].size);
+				}
+				declaration += "]";
+				if (adnode->declarations[i].single_expression) {
+					declaration += "=";
+					declaration += _dump_node_code(adnode->declarations[i].initializer[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+				} else {
+					int sz = adnode->declarations[i].initializer.size();
+					if (sz > 0) {
+						declaration += "=";
+						if (adnode->datatype == SL::TYPE_STRUCT) {
+							declaration += _mkid(adnode->struct_name);
+						} else {
+							declaration += _typestr(adnode->datatype);
+						}
+						declaration += "[";
+						declaration += itos(sz);
+						declaration += "]";
+						declaration += "(";
+						for (int j = 0; j < sz; j++) {
+							declaration += _dump_node_code(adnode->declarations[i].initializer[j], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+							if (j != sz - 1) {
+								declaration += ", ";
+							}
+						}
+						declaration += ")";
+					}
+				}
+			}
+
+			code += declaration;
+		} break;
+		case SL::Node::TYPE_ARRAY: {
+			SL::ArrayNode *anode = (SL::ArrayNode *)p_node;
+			bool use_fragment_varying = false;
+
+			if (!anode->is_local && !(p_actions.entry_point_stages.has(current_func_name) && p_actions.entry_point_stages[current_func_name] == STAGE_VERTEX)) {
+				if (anode->assign_expression != nullptr && shader->varyings.has(anode->name)) {
+					use_fragment_varying = true;
+				} else {
+					if (p_assigning) {
+						if (shader->varyings.has(anode->name)) {
+							use_fragment_varying = true;
+						}
+					} else {
+						if (fragment_varyings.has(anode->name)) {
+							use_fragment_varying = true;
+						}
+					}
+				}
+			}
+
+			if (p_assigning && p_actions.write_flag_pointers.has(anode->name)) {
+				*p_actions.write_flag_pointers[anode->name] = true;
+			}
+
+			if (p_default_actions.usage_defines.has(anode->name) && !used_name_defines.has(anode->name)) {
+				String define = p_default_actions.usage_defines[anode->name];
+				if (define.begins_with("@")) {
+					define = p_default_actions.usage_defines[define.substr(1, define.length())];
+				}
+				r_gen_code.defines.push_back(define);
+				used_name_defines.insert(anode->name);
+			}
+
+			if (p_actions.usage_flag_pointers.has(anode->name) && !used_flag_pointers.has(anode->name)) {
+				*p_actions.usage_flag_pointers[anode->name] = true;
+				used_flag_pointers.insert(anode->name);
+			}
+
+			if (p_default_actions.renames.has(anode->name)) {
+				code = p_default_actions.renames[anode->name];
+			} else {
+				if (shader->uniforms.has(anode->name)) {
+					//its a uniform!
+					const ShaderLanguage::ShaderNode::Uniform &u = shader->uniforms[anode->name];
+					if (u.texture_order >= 0) {
+						code = _mkid(anode->name); //texture, use as is
+					} else {
+						//a scalar or vector
+						if (u.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_GLOBAL) {
+							code = actions.base_uniform_string + _mkid(anode->name); //texture, use as is
+							//global variable, this means the code points to an index to the global table
+							code = _get_global_variable_from_type_and_index(p_default_actions.global_buffer_array_variable, code, u.type);
+						} else if (u.scope == ShaderLanguage::ShaderNode::Uniform::SCOPE_INSTANCE) {
+							//instance variable, index it as such
+							code = "(" + p_default_actions.instance_uniform_index_variable + "+" + itos(u.instance_index) + ")";
+							code = _get_global_variable_from_type_and_index(p_default_actions.global_buffer_array_variable, code, u.type);
+						} else {
+							//regular uniform, index from UBO
+							code = actions.base_uniform_string + _mkid(anode->name);
+						}
+					}
+				} else {
+					if (use_fragment_varying) {
+						code = "frag_to_light.";
+					}
+					code += _mkid(anode->name);
+				}
+			}
+
+			if (anode->call_expression != nullptr) {
+				code += ".";
+				code += _dump_node_code(anode->call_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning, false);
+			} else if (anode->index_expression != nullptr) {
+				code += "[";
+				code += _dump_node_code(anode->index_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+				code += "]";
+			} else if (anode->assign_expression != nullptr) {
+				code += "=";
+				code += _dump_node_code(anode->assign_expression, p_level, r_gen_code, p_actions, p_default_actions, true, false);
+			}
+
+			if (anode->name == time_name) {
+				if (p_actions.entry_point_stages.has(current_func_name) && p_actions.entry_point_stages[current_func_name] == STAGE_VERTEX) {
+					r_gen_code.uses_vertex_time = true;
+				}
+				if (p_actions.entry_point_stages.has(current_func_name) && p_actions.entry_point_stages[current_func_name] == STAGE_FRAGMENT) {
+					r_gen_code.uses_fragment_time = true;
+				}
+			}
+
+		} break;
+		case SL::Node::TYPE_CONSTANT: {
+			SL::ConstantNode *cnode = (SL::ConstantNode *)p_node;
+
+			if (cnode->array_size == 0) {
+				return get_constant_text(cnode->datatype, cnode->values);
+			} else {
+				if (cnode->get_datatype() == SL::TYPE_STRUCT) {
+					code += _mkid(cnode->struct_name);
+				} else {
+					code += _typestr(cnode->datatype);
+				}
+				code += "[";
+				code += itos(cnode->array_size);
+				code += "]";
+				code += "(";
+				for (int i = 0; i < cnode->array_size; i++) {
+					if (i > 0) {
+						code += ",";
+					} else {
+						code += "";
+					}
+					code += _dump_node_code(cnode->array_declarations[0].initializer[i], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+				}
+				code += ")";
+			}
+
+		} break;
+		case SL::Node::TYPE_OPERATOR: {
+			SL::OperatorNode *onode = (SL::OperatorNode *)p_node;
+
+			switch (onode->op) {
+				case SL::OP_ASSIGN:
+				case SL::OP_ASSIGN_ADD:
+				case SL::OP_ASSIGN_SUB:
+				case SL::OP_ASSIGN_MUL:
+				case SL::OP_ASSIGN_DIV:
+				case SL::OP_ASSIGN_SHIFT_LEFT:
+				case SL::OP_ASSIGN_SHIFT_RIGHT:
+				case SL::OP_ASSIGN_MOD:
+				case SL::OP_ASSIGN_BIT_AND:
+				case SL::OP_ASSIGN_BIT_OR:
+				case SL::OP_ASSIGN_BIT_XOR:
+					code = _dump_node_code(onode->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, true) + _opstr(onode->op) + _dump_node_code(onode->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+					break;
+				case SL::OP_BIT_INVERT:
+				case SL::OP_NEGATE:
+				case SL::OP_NOT:
+				case SL::OP_DECREMENT:
+				case SL::OP_INCREMENT:
+					code = _opstr(onode->op) + _dump_node_code(onode->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+					break;
+				case SL::OP_POST_DECREMENT:
+				case SL::OP_POST_INCREMENT:
+					code = _dump_node_code(onode->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + _opstr(onode->op);
+					break;
+				case SL::OP_CALL:
+				case SL::OP_STRUCT:
+				case SL::OP_CONSTRUCT: {
+					ERR_FAIL_COND_V(onode->arguments[0]->type != SL::Node::TYPE_VARIABLE, String());
+
+					SL::VariableNode *vnode = (SL::VariableNode *)onode->arguments[0];
+
+					bool is_texture_func = false;
+					bool is_screen_texture = false;
+					if (onode->op == SL::OP_STRUCT) {
+						code += _mkid(vnode->name);
+					} else if (onode->op == SL::OP_CONSTRUCT) {
+						code += String(vnode->name);
+					} else {
+						if (p_actions.usage_flag_pointers.has(vnode->name) && !used_flag_pointers.has(vnode->name)) {
+							*p_actions.usage_flag_pointers[vnode->name] = true;
+							used_flag_pointers.insert(vnode->name);
+						}
+
+						if (internal_functions.has(vnode->name)) {
+							code += vnode->name;
+							is_texture_func = texture_functions.has(vnode->name);
+						} else if (p_default_actions.renames.has(vnode->name)) {
+							code += p_default_actions.renames[vnode->name];
+						} else {
+							code += _mkid(vnode->name);
+						}
+					}
+
+					code += "(";
+
+					for (int i = 1; i < onode->arguments.size(); i++) {
+						if (i > 1) {
+							code += ", ";
+						}
+						String node_code = _dump_node_code(onode->arguments[i], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+						if (is_texture_func && i == 1) {
+							//need to map from texture to sampler in order to sample
+							StringName texture_uniform;
+							bool correct_texture_uniform = false;
+
+							switch (onode->arguments[i]->type) {
+								case SL::Node::TYPE_VARIABLE: {
+									const SL::VariableNode *varnode = static_cast<const SL::VariableNode *>(onode->arguments[i]);
+									texture_uniform = varnode->name;
+									correct_texture_uniform = true;
+								} break;
+								case SL::Node::TYPE_ARRAY: {
+									const SL::ArrayNode *anode = static_cast<const SL::ArrayNode *>(onode->arguments[i]);
+									texture_uniform = anode->name;
+									correct_texture_uniform = true;
+								} break;
+								default:
+									break;
+							}
+
+							if (correct_texture_uniform) {
+								is_screen_texture = (texture_uniform == "SCREEN_TEXTURE");
+
+								String sampler_name;
+
+								if (actions.custom_samplers.has(texture_uniform)) {
+									sampler_name = actions.custom_samplers[texture_uniform];
+								} else {
+									if (shader->uniforms.has(texture_uniform)) {
+										sampler_name = _get_sampler_name(shader->uniforms[texture_uniform].filter, shader->uniforms[texture_uniform].repeat);
+									} else {
+										bool found = false;
+
+										for (int j = 0; j < function->arguments.size(); j++) {
+											if (function->arguments[j].name == texture_uniform) {
+												if (function->arguments[j].tex_builtin_check) {
+													ERR_CONTINUE(!actions.custom_samplers.has(function->arguments[j].tex_builtin));
+													sampler_name = actions.custom_samplers[function->arguments[j].tex_builtin];
+													found = true;
+													break;
+												}
+												if (function->arguments[j].tex_argument_check) {
+													sampler_name = _get_sampler_name(function->arguments[j].tex_argument_filter, function->arguments[j].tex_argument_repeat);
+													found = true;
+													break;
+												}
+											}
+										}
+										if (!found) {
+											//function was most likely unused, so use anything (compiler will remove it anyway)
+											sampler_name = _get_sampler_name(ShaderLanguage::FILTER_DEFAULT, ShaderLanguage::REPEAT_DEFAULT);
+										}
+									}
+								}
+
+								code += ShaderLanguage::get_datatype_name(onode->arguments[i]->get_datatype()) + "(" + node_code + ", " + sampler_name + ")";
+							} else {
+								code += node_code;
+							}
+						} else {
+							code += node_code;
+						}
+					}
+					code += ")";
+					if (is_screen_texture && actions.apply_luminance_multiplier) {
+						code = "(" + code + " * vec4(vec3(sc_luminance_multiplier), 1.0))";
+					}
+				} break;
+				case SL::OP_INDEX: {
+					code += _dump_node_code(onode->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+					code += "[";
+					code += _dump_node_code(onode->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+					code += "]";
+
+				} break;
+				case SL::OP_SELECT_IF: {
+					code += "(";
+					code += _dump_node_code(onode->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+					code += "?";
+					code += _dump_node_code(onode->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+					code += ":";
+					code += _dump_node_code(onode->arguments[2], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+					code += ")";
+
+				} break;
+				case SL::OP_EMPTY: {
+					// Semicolon (or empty statement) - ignored.
+				} break;
+
+				default: {
+					if (p_use_scope) {
+						code += "(";
+					}
+					code += _dump_node_code(onode->arguments[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + _opstr(onode->op) + _dump_node_code(onode->arguments[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+					if (p_use_scope) {
+						code += ")";
+					}
+					break;
+				}
+			}
+
+		} break;
+		case SL::Node::TYPE_CONTROL_FLOW: {
+			SL::ControlFlowNode *cfnode = (SL::ControlFlowNode *)p_node;
+			if (cfnode->flow_op == SL::FLOW_OP_IF) {
+				code += _mktab(p_level) + "if (" + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ")\n";
+				code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
+				if (cfnode->blocks.size() == 2) {
+					code += _mktab(p_level) + "else\n";
+					code += _dump_node_code(cfnode->blocks[1], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
+				}
+			} else if (cfnode->flow_op == SL::FLOW_OP_SWITCH) {
+				code += _mktab(p_level) + "switch (" + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ")\n";
+				code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
+			} else if (cfnode->flow_op == SL::FLOW_OP_CASE) {
+				code += _mktab(p_level) + "case " + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ":\n";
+				code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
+			} else if (cfnode->flow_op == SL::FLOW_OP_DEFAULT) {
+				code += _mktab(p_level) + "default:\n";
+				code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
+			} else if (cfnode->flow_op == SL::FLOW_OP_DO) {
+				code += _mktab(p_level) + "do";
+				code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
+				code += _mktab(p_level) + "while (" + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ");";
+			} else if (cfnode->flow_op == SL::FLOW_OP_WHILE) {
+				code += _mktab(p_level) + "while (" + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ")\n";
+				code += _dump_node_code(cfnode->blocks[0], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
+			} else if (cfnode->flow_op == SL::FLOW_OP_FOR) {
+				String left = _dump_node_code(cfnode->blocks[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+				String middle = _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+				String right = _dump_node_code(cfnode->expressions[1], p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+				code += _mktab(p_level) + "for (" + left + ";" + middle + ";" + right + ")\n";
+				code += _dump_node_code(cfnode->blocks[1], p_level + 1, r_gen_code, p_actions, p_default_actions, p_assigning);
+
+			} else if (cfnode->flow_op == SL::FLOW_OP_RETURN) {
+				if (cfnode->expressions.size()) {
+					code = "return " + _dump_node_code(cfnode->expressions[0], p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + ";";
+				} else {
+					code = "return;";
+				}
+			} else if (cfnode->flow_op == SL::FLOW_OP_DISCARD) {
+				if (p_actions.usage_flag_pointers.has("DISCARD") && !used_flag_pointers.has("DISCARD")) {
+					*p_actions.usage_flag_pointers["DISCARD"] = true;
+					used_flag_pointers.insert("DISCARD");
+				}
+
+				code = "discard;";
+			} else if (cfnode->flow_op == SL::FLOW_OP_CONTINUE) {
+				code = "continue;";
+			} else if (cfnode->flow_op == SL::FLOW_OP_BREAK) {
+				code = "break;";
+			}
+
+		} break;
+		case SL::Node::TYPE_MEMBER: {
+			SL::MemberNode *mnode = (SL::MemberNode *)p_node;
+			code = _dump_node_code(mnode->owner, p_level, r_gen_code, p_actions, p_default_actions, p_assigning) + "." + mnode->name;
+			if (mnode->index_expression != nullptr) {
+				code += "[";
+				code += _dump_node_code(mnode->index_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning);
+				code += "]";
+			} else if (mnode->assign_expression != nullptr) {
+				code += "=";
+				code += _dump_node_code(mnode->assign_expression, p_level, r_gen_code, p_actions, p_default_actions, true, false);
+			} else if (mnode->call_expression != nullptr) {
+				code += ".";
+				code += _dump_node_code(mnode->call_expression, p_level, r_gen_code, p_actions, p_default_actions, p_assigning, false);
+			}
+		} break;
+	}
+
+	return code;
+}
+
+ShaderLanguage::DataType ShaderCompiler::_get_variable_type(const StringName &p_type) {
+	RS::GlobalVariableType gvt = RS::get_singleton()->global_variable_get_type(p_type);
+	return RS::global_variable_type_get_shader_datatype(gvt);
+}
+
+Error ShaderCompiler::compile(RS::ShaderMode p_mode, const String &p_code, IdentifierActions *p_actions, const String &p_path, GeneratedCode &r_gen_code) {
+	SL::ShaderCompileInfo info;
+	info.functions = ShaderTypes::get_singleton()->get_functions(p_mode);
+	info.render_modes = ShaderTypes::get_singleton()->get_modes(p_mode);
+	info.shader_types = ShaderTypes::get_singleton()->get_types();
+	info.global_variable_type_func = _get_variable_type;
+
+	Error err = parser.compile(p_code, info);
+
+	if (err != OK) {
+		Vector<String> shader = p_code.split("\n");
+		for (int i = 0; i < shader.size(); i++) {
+			if (i + 1 == parser.get_error_line()) {
+				// Mark the error line to be visible without having to look at
+				// the trace at the end.
+				print_line(vformat("E%4d-> %s", i + 1, shader[i]));
+			} else {
+				print_line(vformat("%5d | %s", i + 1, shader[i]));
+			}
+		}
+
+		_err_print_error(nullptr, p_path.utf8().get_data(), parser.get_error_line(), parser.get_error_text().utf8().get_data(), false, ERR_HANDLER_SHADER);
+		return err;
+	}
+
+	r_gen_code.defines.clear();
+	r_gen_code.code.clear();
+	for (int i = 0; i < STAGE_MAX; i++) {
+		r_gen_code.stage_globals[i] = String();
+	}
+	r_gen_code.uses_fragment_time = false;
+	r_gen_code.uses_vertex_time = false;
+	r_gen_code.uses_global_textures = false;
+
+	used_name_defines.clear();
+	used_rmode_defines.clear();
+	used_flag_pointers.clear();
+	fragment_varyings.clear();
+
+	shader = parser.get_shader();
+	function = nullptr;
+	_dump_node_code(shader, 1, r_gen_code, *p_actions, actions, false);
+
+	return OK;
+}
+
+void ShaderCompiler::initialize(DefaultIdentifierActions p_actions) {
+	actions = p_actions;
+
+	time_name = "TIME";
+
+	List<String> func_list;
+
+	ShaderLanguage::get_builtin_funcs(&func_list);
+
+	for (const String &E : func_list) {
+		internal_functions.insert(E);
+	}
+	texture_functions.insert("texture");
+	texture_functions.insert("textureProj");
+	texture_functions.insert("textureLod");
+	texture_functions.insert("textureProjLod");
+	texture_functions.insert("textureGrad");
+	texture_functions.insert("textureGather");
+	texture_functions.insert("textureSize");
+	texture_functions.insert("texelFetch");
+}
+
+ShaderCompiler::ShaderCompiler() {
+#if 0
+
+	/** SPATIAL SHADER **/
+
+	actions[RS::SHADER_SPATIAL].renames["WORLD_MATRIX"] = "world_transform";
+	actions[RS::SHADER_SPATIAL].renames["INV_CAMERA_MATRIX"] = "camera_inverse_matrix";
+	actions[RS::SHADER_SPATIAL].renames["CAMERA_MATRIX"] = "camera_matrix";
+	actions[RS::SHADER_SPATIAL].renames["PROJECTION_MATRIX"] = "projection_matrix";
+	actions[RS::SHADER_SPATIAL].renames["INV_PROJECTION_MATRIX"] = "inv_projection_matrix";
+	actions[RS::SHADER_SPATIAL].renames["MODELVIEW_MATRIX"] = "modelview";
+
+	actions[RS::SHADER_SPATIAL].renames["VERTEX"] = "vertex.xyz";
+	actions[RS::SHADER_SPATIAL].renames["NORMAL"] = "normal";
+	actions[RS::SHADER_SPATIAL].renames["TANGENT"] = "tangent";
+	actions[RS::SHADER_SPATIAL].renames["BINORMAL"] = "binormal";
+	actions[RS::SHADER_SPATIAL].renames["POSITION"] = "position";
+	actions[RS::SHADER_SPATIAL].renames["UV"] = "uv_interp";
+	actions[RS::SHADER_SPATIAL].renames["UV2"] = "uv2_interp";
+	actions[RS::SHADER_SPATIAL].renames["COLOR"] = "color_interp";
+	actions[RS::SHADER_SPATIAL].renames["POINT_SIZE"] = "gl_PointSize";
+	actions[RS::SHADER_SPATIAL].renames["INSTANCE_ID"] = "gl_InstanceID";
+
+	//builtins
+
+	actions[RS::SHADER_SPATIAL].renames["TIME"] = "time";
+	actions[RS::SHADER_SPATIAL].renames["VIEWPORT_SIZE"] = "viewport_size";
+
+	actions[RS::SHADER_SPATIAL].renames["FRAGCOORD"] = "gl_FragCoord";
+	actions[RS::SHADER_SPATIAL].renames["FRONT_FACING"] = "gl_FrontFacing";
+	actions[RS::SHADER_SPATIAL].renames["NORMAL_MAP"] = "normal_map";
+	actions[RS::SHADER_SPATIAL].renames["NORMAL_MAP_DEPTH"] = "normal_map_depth";
+	actions[RS::SHADER_SPATIAL].renames["ALBEDO"] = "albedo";
+	actions[RS::SHADER_SPATIAL].renames["ALPHA"] = "alpha";
+	actions[RS::SHADER_SPATIAL].renames["METALLIC"] = "metallic";
+	actions[RS::SHADER_SPATIAL].renames["SPECULAR"] = "specular";
+	actions[RS::SHADER_SPATIAL].renames["ROUGHNESS"] = "roughness";
+	actions[RS::SHADER_SPATIAL].renames["RIM"] = "rim";
+	actions[RS::SHADER_SPATIAL].renames["RIM_TINT"] = "rim_tint";
+	actions[RS::SHADER_SPATIAL].renames["CLEARCOAT"] = "clearcoat";
+	actions[RS::SHADER_SPATIAL].renames["CLEARCOAT_GLOSS"] = "clearcoat_gloss";
+	actions[RS::SHADER_SPATIAL].renames["ANISOTROPY"] = "anisotropy";
+	actions[RS::SHADER_SPATIAL].renames["ANISOTROPY_FLOW"] = "anisotropy_flow";
+	actions[RS::SHADER_SPATIAL].renames["SSS_STRENGTH"] = "sss_strength";
+	actions[RS::SHADER_SPATIAL].renames["TRANSMISSION"] = "transmission";
+	actions[RS::SHADER_SPATIAL].renames["AO"] = "ao";
+	actions[RS::SHADER_SPATIAL].renames["AO_LIGHT_AFFECT"] = "ao_light_affect";
+	actions[RS::SHADER_SPATIAL].renames["EMISSION"] = "emission";
+	actions[RS::SHADER_SPATIAL].renames["POINT_COORD"] = "gl_PointCoord";
+	actions[RS::SHADER_SPATIAL].renames["INSTANCE_CUSTOM"] = "instance_custom";
+	actions[RS::SHADER_SPATIAL].renames["SCREEN_UV"] = "screen_uv";
+	actions[RS::SHADER_SPATIAL].renames["SCREEN_TEXTURE"] = "screen_texture";
+	actions[RS::SHADER_SPATIAL].renames["DEPTH_TEXTURE"] = "depth_buffer";
+	actions[RS::SHADER_SPATIAL].renames["DEPTH"] = "gl_FragDepth";
+	actions[RS::SHADER_SPATIAL].renames["ALPHA_SCISSOR"] = "alpha_scissor";
+	actions[RS::SHADER_SPATIAL].renames["OUTPUT_IS_SRGB"] = "SHADER_IS_SRGB";
+
+	//for light
+	actions[RS::SHADER_SPATIAL].renames["VIEW"] = "view";
+	actions[RS::SHADER_SPATIAL].renames["LIGHT_COLOR"] = "light_color";
+	actions[RS::SHADER_SPATIAL].renames["LIGHT"] = "light";
+	actions[RS::SHADER_SPATIAL].renames["ATTENUATION"] = "attenuation";
+	actions[RS::SHADER_SPATIAL].renames["DIFFUSE_LIGHT"] = "diffuse_light";
+	actions[RS::SHADER_SPATIAL].renames["SPECULAR_LIGHT"] = "specular_light";
+
+	actions[RS::SHADER_SPATIAL].usage_defines["TANGENT"] = "#define ENABLE_TANGENT_INTERP\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["BINORMAL"] = "@TANGENT";
+	actions[RS::SHADER_SPATIAL].usage_defines["RIM"] = "#define LIGHT_USE_RIM\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["RIM_TINT"] = "@RIM";
+	actions[RS::SHADER_SPATIAL].usage_defines["CLEARCOAT"] = "#define LIGHT_USE_CLEARCOAT\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["CLEARCOAT_GLOSS"] = "@CLEARCOAT";
+	actions[RS::SHADER_SPATIAL].usage_defines["ANISOTROPY"] = "#define LIGHT_USE_ANISOTROPY\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["ANISOTROPY_FLOW"] = "@ANISOTROPY";
+	actions[RS::SHADER_SPATIAL].usage_defines["AO"] = "#define ENABLE_AO\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["AO_LIGHT_AFFECT"] = "#define ENABLE_AO\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["UV"] = "#define ENABLE_UV_INTERP\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["UV2"] = "#define ENABLE_UV2_INTERP\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["NORMAL_MAP"] = "#define ENABLE_NORMAL_MAP\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["NORMAL_MAP_DEPTH"] = "@NORMAL_MAP";
+	actions[RS::SHADER_SPATIAL].usage_defines["COLOR"] = "#define ENABLE_COLOR_INTERP\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["INSTANCE_CUSTOM"] = "#define ENABLE_INSTANCE_CUSTOM\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["ALPHA_SCISSOR"] = "#define ALPHA_SCISSOR_USED\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["POSITION"] = "#define OVERRIDE_POSITION\n";
+
+	actions[RS::SHADER_SPATIAL].usage_defines["SSS_STRENGTH"] = "#define ENABLE_SSS\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["TRANSMISSION"] = "#define TRANSMISSION_USED\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["SCREEN_TEXTURE"] = "#define SCREEN_TEXTURE_USED\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["SCREEN_UV"] = "#define SCREEN_UV_USED\n";
+
+	actions[RS::SHADER_SPATIAL].usage_defines["DIFFUSE_LIGHT"] = "#define USE_LIGHT_SHADER_CODE\n";
+	actions[RS::SHADER_SPATIAL].usage_defines["SPECULAR_LIGHT"] = "#define USE_LIGHT_SHADER_CODE\n";
+
+	actions[RS::SHADER_SPATIAL].render_mode_defines["skip_vertex_transform"] = "#define SKIP_TRANSFORM_USED\n";
+	actions[RS::SHADER_SPATIAL].render_mode_defines["world_vertex_coords"] = "#define VERTEX_WORLD_COORDS_USED\n";
+	actions[RS::SHADER_SPATIAL].render_mode_defines["ensure_correct_normals"] = "#define ENSURE_CORRECT_NORMALS\n";
+	actions[RS::SHADER_SPATIAL].render_mode_defines["cull_front"] = "#define DO_SIDE_CHECK\n";
+	actions[RS::SHADER_SPATIAL].render_mode_defines["cull_disabled"] = "#define DO_SIDE_CHECK\n";
+
+	bool force_lambert = GLOBAL_GET("rendering/shading/overrides/force_lambert_over_burley");
+
+	if (!force_lambert) {
+		actions[RS::SHADER_SPATIAL].render_mode_defines["diffuse_burley"] = "#define DIFFUSE_BURLEY\n";
+	}
+
+	actions[RS::SHADER_SPATIAL].render_mode_defines["diffuse_lambert_wrap"] = "#define DIFFUSE_LAMBERT_WRAP\n";
+	actions[RS::SHADER_SPATIAL].render_mode_defines["diffuse_toon"] = "#define DIFFUSE_TOON\n";
+
+	bool force_blinn = GLOBAL_GET("rendering/shading/overrides/force_blinn_over_ggx");
+
+	if (!force_blinn) {
+		actions[RS::SHADER_SPATIAL].render_mode_defines["specular_schlick_ggx"] = "#define SPECULAR_SCHLICK_GGX\n";
+	} else {
+		actions[RS::SHADER_SPATIAL].render_mode_defines["specular_schlick_ggx"] = "#define SPECULAR_BLINN\n";
+	}
+
+	actions[RS::SHADER_SPATIAL].render_mode_defines["specular_blinn"] = "#define SPECULAR_BLINN\n";
+	actions[RS::SHADER_SPATIAL].render_mode_defines["specular_phong"] = "#define SPECULAR_PHONG\n";
+	actions[RS::SHADER_SPATIAL].render_mode_defines["specular_toon"] = "#define SPECULAR_TOON\n";
+	actions[RS::SHADER_SPATIAL].render_mode_defines["specular_disabled"] = "#define SPECULAR_DISABLED\n";
+	actions[RS::SHADER_SPATIAL].render_mode_defines["shadows_disabled"] = "#define SHADOWS_DISABLED\n";
+	actions[RS::SHADER_SPATIAL].render_mode_defines["ambient_light_disabled"] = "#define AMBIENT_LIGHT_DISABLED\n";
+	actions[RS::SHADER_SPATIAL].render_mode_defines["shadow_to_opacity"] = "#define USE_SHADOW_TO_OPACITY\n";
+
+	/* PARTICLES SHADER */
+
+	actions[RS::SHADER_PARTICLES].renames["COLOR"] = "out_color";
+	actions[RS::SHADER_PARTICLES].renames["VELOCITY"] = "out_velocity_active.xyz";
+	actions[RS::SHADER_PARTICLES].renames["MASS"] = "mass";
+	actions[RS::SHADER_PARTICLES].renames["ACTIVE"] = "shader_active";
+	actions[RS::SHADER_PARTICLES].renames["RESTART"] = "restart";
+	actions[RS::SHADER_PARTICLES].renames["CUSTOM"] = "out_custom";
+	actions[RS::SHADER_PARTICLES].renames["TRANSFORM"] = "xform";
+	actions[RS::SHADER_PARTICLES].renames["TIME"] = "time";
+	actions[RS::SHADER_PARTICLES].renames["LIFETIME"] = "lifetime";
+	actions[RS::SHADER_PARTICLES].renames["DELTA"] = "local_delta";
+	actions[RS::SHADER_PARTICLES].renames["NUMBER"] = "particle_number";
+	actions[RS::SHADER_PARTICLES].renames["INDEX"] = "index";
+	actions[RS::SHADER_PARTICLES].renames["GRAVITY"] = "current_gravity";
+	actions[RS::SHADER_PARTICLES].renames["EMISSION_TRANSFORM"] = "emission_transform";
+	actions[RS::SHADER_PARTICLES].renames["RANDOM_SEED"] = "random_seed";
+
+	actions[RS::SHADER_PARTICLES].render_mode_defines["disable_force"] = "#define DISABLE_FORCE\n";
+	actions[RS::SHADER_PARTICLES].render_mode_defines["disable_velocity"] = "#define DISABLE_VELOCITY\n";
+	actions[RS::SHADER_PARTICLES].render_mode_defines["keep_data"] = "#define ENABLE_KEEP_DATA\n";
+#endif
+}