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godot/servers/rendering/shader_language.h
David Snopek 1a6f8512bc Add external texture support (GLES3) 
Co-authored-by: Fredia Huya-Kouadio <fhuyakou@gmail.com>
Co-authored-by: Mauricio Narvaez <nvz@meta.com>
2024-09-20 10:48:32 -05:00

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/**************************************************************************/
/* shader_language.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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. */
/**************************************************************************/
#ifndef SHADER_LANGUAGE_H
#define SHADER_LANGUAGE_H
#include "core/object/script_language.h"
#include "core/string/string_name.h"
#include "core/string/ustring.h"
#include "core/templates/list.h"
#include "core/templates/rb_map.h"
#include "core/typedefs.h"
#include "core/variant/variant.h"
#include "scene/resources/shader_include.h"
#ifdef DEBUG_ENABLED
#include "shader_warnings.h"
#endif // DEBUG_ENABLED
class ShaderLanguage {
public:
struct TkPos {
int char_idx;
int tk_line;
};
enum TokenType {
TK_EMPTY,
TK_IDENTIFIER,
TK_TRUE,
TK_FALSE,
TK_FLOAT_CONSTANT,
TK_INT_CONSTANT,
TK_UINT_CONSTANT,
TK_STRING_CONSTANT,
TK_TYPE_VOID,
TK_TYPE_BOOL,
TK_TYPE_BVEC2,
TK_TYPE_BVEC3,
TK_TYPE_BVEC4,
TK_TYPE_INT,
TK_TYPE_IVEC2,
TK_TYPE_IVEC3,
TK_TYPE_IVEC4,
TK_TYPE_UINT,
TK_TYPE_UVEC2,
TK_TYPE_UVEC3,
TK_TYPE_UVEC4,
TK_TYPE_FLOAT,
TK_TYPE_VEC2,
TK_TYPE_VEC3,
TK_TYPE_VEC4,
TK_TYPE_MAT2,
TK_TYPE_MAT3,
TK_TYPE_MAT4,
TK_TYPE_SAMPLER2D,
TK_TYPE_ISAMPLER2D,
TK_TYPE_USAMPLER2D,
TK_TYPE_SAMPLER2DARRAY,
TK_TYPE_ISAMPLER2DARRAY,
TK_TYPE_USAMPLER2DARRAY,
TK_TYPE_SAMPLER3D,
TK_TYPE_ISAMPLER3D,
TK_TYPE_USAMPLER3D,
TK_TYPE_SAMPLERCUBE,
TK_TYPE_SAMPLERCUBEARRAY,
TK_TYPE_SAMPLEREXT,
TK_INTERPOLATION_FLAT,
TK_INTERPOLATION_SMOOTH,
TK_CONST,
TK_STRUCT,
TK_PRECISION_LOW,
TK_PRECISION_MID,
TK_PRECISION_HIGH,
TK_OP_EQUAL,
TK_OP_NOT_EQUAL,
TK_OP_LESS,
TK_OP_LESS_EQUAL,
TK_OP_GREATER,
TK_OP_GREATER_EQUAL,
TK_OP_AND,
TK_OP_OR,
TK_OP_NOT,
TK_OP_ADD,
TK_OP_SUB,
TK_OP_MUL,
TK_OP_DIV,
TK_OP_MOD,
TK_OP_SHIFT_LEFT,
TK_OP_SHIFT_RIGHT,
TK_OP_ASSIGN,
TK_OP_ASSIGN_ADD,
TK_OP_ASSIGN_SUB,
TK_OP_ASSIGN_MUL,
TK_OP_ASSIGN_DIV,
TK_OP_ASSIGN_MOD,
TK_OP_ASSIGN_SHIFT_LEFT,
TK_OP_ASSIGN_SHIFT_RIGHT,
TK_OP_ASSIGN_BIT_AND,
TK_OP_ASSIGN_BIT_OR,
TK_OP_ASSIGN_BIT_XOR,
TK_OP_BIT_AND,
TK_OP_BIT_OR,
TK_OP_BIT_XOR,
TK_OP_BIT_INVERT,
TK_OP_INCREMENT,
TK_OP_DECREMENT,
TK_CF_IF,
TK_CF_ELSE,
TK_CF_FOR,
TK_CF_WHILE,
TK_CF_DO,
TK_CF_SWITCH,
TK_CF_CASE,
TK_CF_DEFAULT,
TK_CF_BREAK,
TK_CF_CONTINUE,
TK_CF_RETURN,
TK_CF_DISCARD,
TK_BRACKET_OPEN,
TK_BRACKET_CLOSE,
TK_CURLY_BRACKET_OPEN,
TK_CURLY_BRACKET_CLOSE,
TK_PARENTHESIS_OPEN,
TK_PARENTHESIS_CLOSE,
TK_QUESTION,
TK_COMMA,
TK_COLON,
TK_SEMICOLON,
TK_PERIOD,
TK_UNIFORM,
TK_UNIFORM_GROUP,
TK_INSTANCE,
TK_GLOBAL,
TK_VARYING,
TK_ARG_IN,
TK_ARG_OUT,
TK_ARG_INOUT,
TK_RENDER_MODE,
TK_HINT_DEFAULT_WHITE_TEXTURE,
TK_HINT_DEFAULT_BLACK_TEXTURE,
TK_HINT_DEFAULT_TRANSPARENT_TEXTURE,
TK_HINT_NORMAL_TEXTURE,
TK_HINT_ROUGHNESS_NORMAL_TEXTURE,
TK_HINT_ROUGHNESS_R,
TK_HINT_ROUGHNESS_G,
TK_HINT_ROUGHNESS_B,
TK_HINT_ROUGHNESS_A,
TK_HINT_ROUGHNESS_GRAY,
TK_HINT_ANISOTROPY_TEXTURE,
TK_HINT_SOURCE_COLOR,
TK_HINT_RANGE,
TK_HINT_ENUM,
TK_HINT_INSTANCE_INDEX,
TK_HINT_SCREEN_TEXTURE,
TK_HINT_NORMAL_ROUGHNESS_TEXTURE,
TK_HINT_DEPTH_TEXTURE,
TK_FILTER_NEAREST,
TK_FILTER_LINEAR,
TK_FILTER_NEAREST_MIPMAP,
TK_FILTER_LINEAR_MIPMAP,
TK_FILTER_NEAREST_MIPMAP_ANISOTROPIC,
TK_FILTER_LINEAR_MIPMAP_ANISOTROPIC,
TK_REPEAT_ENABLE,
TK_REPEAT_DISABLE,
TK_SHADER_TYPE,
TK_CURSOR,
TK_ERROR,
TK_EOF,
TK_MAX
};
/* COMPILER */
// lame work around to Apple defining this as a macro in 10.12 SDK
#ifdef TYPE_BOOL
#undef TYPE_BOOL
#endif
enum DataType {
TYPE_VOID,
TYPE_BOOL,
TYPE_BVEC2,
TYPE_BVEC3,
TYPE_BVEC4,
TYPE_INT,
TYPE_IVEC2,
TYPE_IVEC3,
TYPE_IVEC4,
TYPE_UINT,
TYPE_UVEC2,
TYPE_UVEC3,
TYPE_UVEC4,
TYPE_FLOAT,
TYPE_VEC2,
TYPE_VEC3,
TYPE_VEC4,
TYPE_MAT2,
TYPE_MAT3,
TYPE_MAT4,
TYPE_SAMPLER2D,
TYPE_ISAMPLER2D,
TYPE_USAMPLER2D,
TYPE_SAMPLER2DARRAY,
TYPE_ISAMPLER2DARRAY,
TYPE_USAMPLER2DARRAY,
TYPE_SAMPLER3D,
TYPE_ISAMPLER3D,
TYPE_USAMPLER3D,
TYPE_SAMPLERCUBE,
TYPE_SAMPLERCUBEARRAY,
TYPE_SAMPLEREXT,
TYPE_STRUCT,
TYPE_MAX
};
enum DataPrecision {
PRECISION_LOWP,
PRECISION_MEDIUMP,
PRECISION_HIGHP,
PRECISION_DEFAULT,
};
enum DataInterpolation {
INTERPOLATION_FLAT,
INTERPOLATION_SMOOTH,
INTERPOLATION_DEFAULT,
};
enum Operator {
OP_EQUAL,
OP_NOT_EQUAL,
OP_LESS,
OP_LESS_EQUAL,
OP_GREATER,
OP_GREATER_EQUAL,
OP_AND,
OP_OR,
OP_NOT,
OP_NEGATE,
OP_ADD,
OP_SUB,
OP_MUL,
OP_DIV,
OP_MOD,
OP_SHIFT_LEFT,
OP_SHIFT_RIGHT,
OP_ASSIGN,
OP_ASSIGN_ADD,
OP_ASSIGN_SUB,
OP_ASSIGN_MUL,
OP_ASSIGN_DIV,
OP_ASSIGN_MOD,
OP_ASSIGN_SHIFT_LEFT,
OP_ASSIGN_SHIFT_RIGHT,
OP_ASSIGN_BIT_AND,
OP_ASSIGN_BIT_OR,
OP_ASSIGN_BIT_XOR,
OP_BIT_AND,
OP_BIT_OR,
OP_BIT_XOR,
OP_BIT_INVERT,
OP_INCREMENT,
OP_DECREMENT,
OP_SELECT_IF,
OP_SELECT_ELSE, //used only internally, then only IF appears with 3 arguments
OP_POST_INCREMENT,
OP_POST_DECREMENT,
OP_CALL,
OP_CONSTRUCT,
OP_STRUCT,
OP_INDEX,
OP_EMPTY,
OP_MAX
};
enum FlowOperation {
FLOW_OP_IF,
FLOW_OP_RETURN,
FLOW_OP_FOR,
FLOW_OP_WHILE,
FLOW_OP_DO,
FLOW_OP_BREAK,
FLOW_OP_SWITCH,
FLOW_OP_CASE,
FLOW_OP_DEFAULT,
FLOW_OP_CONTINUE,
FLOW_OP_DISCARD
};
enum ArgumentQualifier {
ARGUMENT_QUALIFIER_IN,
ARGUMENT_QUALIFIER_OUT,
ARGUMENT_QUALIFIER_INOUT,
};
enum SubClassTag {
TAG_GLOBAL,
TAG_ARRAY,
};
enum TextureFilter {
FILTER_NEAREST,
FILTER_LINEAR,
FILTER_NEAREST_MIPMAP,
FILTER_LINEAR_MIPMAP,
FILTER_NEAREST_MIPMAP_ANISOTROPIC,
FILTER_LINEAR_MIPMAP_ANISOTROPIC,
FILTER_DEFAULT,
};
enum TextureRepeat {
REPEAT_DISABLE,
REPEAT_ENABLE,
REPEAT_DEFAULT,
};
enum {
MAX_INSTANCE_UNIFORM_INDICES = 16
};
struct VaryingFunctionNames {
StringName fragment;
StringName vertex;
StringName light;
VaryingFunctionNames() {
fragment = "fragment";
vertex = "vertex";
light = "light";
}
};
union Scalar {
bool boolean = false;
float real;
int32_t sint;
uint32_t uint;
};
struct Node {
Node *next = nullptr;
enum Type {
NODE_TYPE_SHADER,
NODE_TYPE_FUNCTION,
NODE_TYPE_BLOCK,
NODE_TYPE_VARIABLE,
NODE_TYPE_VARIABLE_DECLARATION,
NODE_TYPE_CONSTANT,
NODE_TYPE_OPERATOR,
NODE_TYPE_CONTROL_FLOW,
NODE_TYPE_MEMBER,
NODE_TYPE_ARRAY,
NODE_TYPE_ARRAY_CONSTRUCT,
NODE_TYPE_STRUCT,
};
Type type;
virtual DataType get_datatype() const { return TYPE_VOID; }
virtual String get_datatype_name() const { return ""; }
virtual int get_array_size() const { return 0; }
virtual bool is_indexed() const { return false; }
virtual Vector<Scalar> get_values() const { return Vector<Scalar>(); }
Node(Type t) :
type(t) {}
virtual ~Node() {}
};
template <typename T>
T *alloc_node() {
T *node = memnew(T);
node->next = nodes;
nodes = node;
return node;
}
Node *nodes = nullptr;
struct OperatorNode : public Node {
DataType return_cache = TYPE_VOID;
DataPrecision return_precision_cache = PRECISION_DEFAULT;
int return_array_size = 0;
Operator op = OP_EQUAL;
StringName struct_name;
Vector<Node *> arguments;
Vector<Scalar> values;
virtual DataType get_datatype() const override { return return_cache; }
virtual String get_datatype_name() const override { return String(struct_name); }
virtual int get_array_size() const override { return return_array_size; }
virtual bool is_indexed() const override { return op == OP_INDEX; }
virtual Vector<Scalar> get_values() const override { return values; }
OperatorNode() :
Node(NODE_TYPE_OPERATOR) {}
};
struct VariableNode : public Node {
DataType datatype_cache = TYPE_VOID;
StringName name;
StringName struct_name;
bool is_const = false;
bool is_local = false;
virtual DataType get_datatype() const override { return datatype_cache; }
virtual String get_datatype_name() const override { return String(struct_name); }
VariableNode() :
Node(NODE_TYPE_VARIABLE) {}
};
struct VariableDeclarationNode : public Node {
DataPrecision precision = PRECISION_DEFAULT;
DataType datatype = TYPE_VOID;
String struct_name;
bool is_const = false;
struct Declaration {
StringName name;
uint32_t size = 0U;
Node *size_expression = nullptr;
Vector<Node *> initializer;
bool single_expression = false;
};
Vector<Declaration> declarations;
virtual DataType get_datatype() const override { return datatype; }
VariableDeclarationNode() :
Node(NODE_TYPE_VARIABLE_DECLARATION) {}
};
struct ArrayNode : public Node {
DataType datatype_cache = TYPE_VOID;
StringName struct_name;
StringName name;
Node *index_expression = nullptr;
Node *call_expression = nullptr;
Node *assign_expression = nullptr;
bool is_const = false;
int array_size = 0;
bool is_local = false;
virtual DataType get_datatype() const override { return call_expression ? call_expression->get_datatype() : datatype_cache; }
virtual String get_datatype_name() const override { return call_expression ? call_expression->get_datatype_name() : String(struct_name); }
virtual int get_array_size() const override { return (index_expression || call_expression) ? 0 : array_size; }
virtual bool is_indexed() const override { return index_expression != nullptr; }
ArrayNode() :
Node(NODE_TYPE_ARRAY) {}
};
struct ArrayConstructNode : public Node {
DataType datatype = TYPE_VOID;
String struct_name;
Vector<Node *> initializer;
virtual DataType get_datatype() const override { return datatype; }
virtual String get_datatype_name() const override { return struct_name; }
virtual int get_array_size() const override { return initializer.size(); }
ArrayConstructNode() :
Node(NODE_TYPE_ARRAY_CONSTRUCT) {}
};
struct ConstantNode : public Node {
DataType datatype = TYPE_VOID;
String struct_name = "";
int array_size = 0;
Vector<Scalar> values;
Vector<VariableDeclarationNode::Declaration> array_declarations;
virtual DataType get_datatype() const override { return datatype; }
virtual String get_datatype_name() const override { return struct_name; }
virtual int get_array_size() const override { return array_size; }
virtual Vector<Scalar> get_values() const override {
return values;
}
ConstantNode() :
Node(NODE_TYPE_CONSTANT) {}
};
struct FunctionNode;
struct BlockNode : public Node {
FunctionNode *parent_function = nullptr;
BlockNode *parent_block = nullptr;
enum BlockType {
BLOCK_TYPE_STANDARD,
BLOCK_TYPE_FOR_INIT,
BLOCK_TYPE_FOR_CONDITION,
BLOCK_TYPE_FOR_EXPRESSION,
BLOCK_TYPE_SWITCH,
BLOCK_TYPE_CASE,
BLOCK_TYPE_DEFAULT,
};
int block_type = BLOCK_TYPE_STANDARD;
SubClassTag block_tag = SubClassTag::TAG_GLOBAL;
struct Variable {
DataType type;
StringName struct_name;
DataPrecision precision;
int line; //for completion
int array_size;
bool is_const;
Vector<Scalar> values;
};
HashMap<StringName, Variable> variables;
List<Node *> statements;
bool single_statement = false;
bool use_comma_between_statements = false;
bool use_op_eval = true;
DataType expected_type = TYPE_VOID;
HashSet<int> constants;
BlockNode() :
Node(NODE_TYPE_BLOCK) {}
};
struct ControlFlowNode : public Node {
FlowOperation flow_op = FLOW_OP_IF;
Vector<Node *> expressions;
Vector<BlockNode *> blocks;
ControlFlowNode() :
Node(NODE_TYPE_CONTROL_FLOW) {}
};
struct MemberNode : public Node {
DataType basetype = TYPE_VOID;
bool basetype_const = false;
StringName base_struct_name;
DataPrecision precision = PRECISION_DEFAULT;
DataType datatype = TYPE_VOID;
int array_size = 0;
StringName struct_name;
StringName name;
Node *owner = nullptr;
Node *index_expression = nullptr;
Node *assign_expression = nullptr;
Node *call_expression = nullptr;
bool has_swizzling_duplicates = false;
virtual DataType get_datatype() const override { return call_expression ? call_expression->get_datatype() : datatype; }
virtual String get_datatype_name() const override { return call_expression ? call_expression->get_datatype_name() : String(struct_name); }
virtual int get_array_size() const override { return (index_expression || call_expression) ? 0 : array_size; }
virtual bool is_indexed() const override { return index_expression != nullptr || call_expression != nullptr; }
MemberNode() :
Node(NODE_TYPE_MEMBER) {}
};
struct StructNode : public Node {
List<MemberNode *> members;
StructNode() :
Node(NODE_TYPE_STRUCT) {}
};
struct ShaderNode : public Node {
struct Constant {
StringName name;
DataType type;
StringName struct_name;
DataPrecision precision;
Node *initializer = nullptr;
int array_size;
};
struct Function {
StringName name;
FunctionNode *function = nullptr;
HashSet<StringName> uses_function;
bool callable;
};
struct Struct {
StringName name;
StructNode *shader_struct = nullptr;
};
struct Varying {
enum Stage {
STAGE_UNKNOWN,
STAGE_VERTEX, // transition stage to STAGE_VERTEX_TO_FRAGMENT_LIGHT, emits warning if it's not used
STAGE_FRAGMENT, // transition stage to STAGE_FRAGMENT_TO_LIGHT, emits warning if it's not used
STAGE_VERTEX_TO_FRAGMENT_LIGHT,
STAGE_FRAGMENT_TO_LIGHT,
};
Stage stage = STAGE_UNKNOWN;
DataType type = TYPE_VOID;
DataInterpolation interpolation = INTERPOLATION_FLAT;
DataPrecision precision = PRECISION_DEFAULT;
int array_size = 0;
TkPos tkpos;
Varying() {}
};
struct Uniform {
enum Hint {
HINT_NONE,
HINT_RANGE,
HINT_ENUM,
HINT_SOURCE_COLOR,
HINT_NORMAL,
HINT_ROUGHNESS_NORMAL,
HINT_ROUGHNESS_R,
HINT_ROUGHNESS_G,
HINT_ROUGHNESS_B,
HINT_ROUGHNESS_A,
HINT_ROUGHNESS_GRAY,
HINT_DEFAULT_BLACK,
HINT_DEFAULT_WHITE,
HINT_DEFAULT_TRANSPARENT,
HINT_ANISOTROPY,
HINT_SCREEN_TEXTURE,
HINT_NORMAL_ROUGHNESS_TEXTURE,
HINT_DEPTH_TEXTURE,
HINT_MAX
};
enum Scope {
SCOPE_LOCAL,
SCOPE_INSTANCE,
SCOPE_GLOBAL,
};
int order = 0;
int prop_order = 0;
int texture_order = 0;
int texture_binding = 0;
DataType type = TYPE_VOID;
DataPrecision precision = PRECISION_DEFAULT;
int array_size = 0;
Vector<Scalar> default_value;
Scope scope = SCOPE_LOCAL;
Hint hint = HINT_NONE;
bool use_color = false;
TextureFilter filter = FILTER_DEFAULT;
TextureRepeat repeat = REPEAT_DEFAULT;
float hint_range[3];
PackedStringArray hint_enum_names;
int instance_index = 0;
String group;
String subgroup;
_FORCE_INLINE_ bool is_texture() const {
// Order is assigned to -1 for texture uniforms.
return order < 0;
}
Uniform() {
hint_range[0] = 0.0f;
hint_range[1] = 1.0f;
hint_range[2] = 0.001f;
}
};
HashMap<StringName, Constant> constants;
HashMap<StringName, Varying> varyings;
HashMap<StringName, Uniform> uniforms;
HashMap<StringName, Struct> structs;
HashMap<StringName, Function> functions;
Vector<StringName> render_modes;
Vector<Function> vfunctions;
Vector<Constant> vconstants;
Vector<Struct> vstructs;
ShaderNode() :
Node(NODE_TYPE_SHADER) {}
};
struct FunctionNode : public Node {
struct Argument {
ArgumentQualifier qualifier;
StringName name;
DataType type;
StringName struct_name;
DataPrecision precision;
//for passing textures as arguments
bool tex_argument_check;
TextureFilter tex_argument_filter;
TextureRepeat tex_argument_repeat;
bool tex_builtin_check;
StringName tex_builtin;
ShaderNode::Uniform::Hint tex_hint;
bool is_const;
int array_size;
HashMap<StringName, HashSet<int>> tex_argument_connect;
};
StringName name;
DataType return_type = TYPE_VOID;
StringName return_struct_name;
DataPrecision return_precision = PRECISION_DEFAULT;
int return_array_size = 0;
Vector<Argument> arguments;
BlockNode *body = nullptr;
bool can_discard = false;
virtual DataType get_datatype() const override { return return_type; }
virtual String get_datatype_name() const override { return String(return_struct_name); }
virtual int get_array_size() const override { return return_array_size; }
FunctionNode() :
Node(NODE_TYPE_FUNCTION) {}
};
struct UniformOrderComparator {
_FORCE_INLINE_ bool operator()(const Pair<StringName, int> &A, const Pair<StringName, int> &B) const {
return A.second < B.second;
}
};
struct Expression {
bool is_op;
union {
Operator op;
Node *node = nullptr;
};
};
struct ExpressionInfo {
Vector<Expression> *expression = nullptr;
TokenType tt_break = TK_EMPTY;
bool is_last_expr = false;
};
struct VarInfo {
StringName name;
DataType type;
};
enum CompletionType {
COMPLETION_NONE,
COMPLETION_SHADER_TYPE,
COMPLETION_RENDER_MODE,
COMPLETION_MAIN_FUNCTION,
COMPLETION_IDENTIFIER,
COMPLETION_FUNCTION_CALL,
COMPLETION_CALL_ARGUMENTS,
COMPLETION_INDEX,
COMPLETION_STRUCT,
COMPLETION_HINT,
};
struct Token {
TokenType type;
StringName text;
double constant;
uint16_t line;
bool is_integer_constant() const {
return type == TK_INT_CONSTANT || type == TK_UINT_CONSTANT;
}
};
static String get_operator_text(Operator p_op);
static String get_token_text(Token p_token);
static bool is_token_datatype(TokenType p_type);
static bool is_token_variable_datatype(TokenType p_type);
static DataType get_token_datatype(TokenType p_type);
static bool is_token_interpolation(TokenType p_type);
static DataInterpolation get_token_interpolation(TokenType p_type);
static bool is_token_precision(TokenType p_type);
static bool is_token_arg_qual(TokenType p_type);
static DataPrecision get_token_precision(TokenType p_type);
static String get_precision_name(DataPrecision p_type);
static String get_interpolation_name(DataInterpolation p_interpolation);
static String get_datatype_name(DataType p_type);
static String get_uniform_hint_name(ShaderNode::Uniform::Hint p_hint);
static String get_texture_filter_name(TextureFilter p_filter);
static String get_texture_repeat_name(TextureRepeat p_repeat);
static bool is_token_nonvoid_datatype(TokenType p_type);
static bool is_token_operator(TokenType p_type);
static bool is_token_operator_assign(TokenType p_type);
static bool is_token_hint(TokenType p_type);
static bool convert_constant(ConstantNode *p_constant, DataType p_to_type, Scalar *p_value = nullptr);
static DataType get_scalar_type(DataType p_type);
static int get_cardinality(DataType p_type);
static bool is_scalar_type(DataType p_type);
static bool is_float_type(DataType p_type);
static bool is_sampler_type(DataType p_type);
static Variant constant_value_to_variant(const Vector<Scalar> &p_value, DataType p_type, int p_array_size, ShaderLanguage::ShaderNode::Uniform::Hint p_hint = ShaderLanguage::ShaderNode::Uniform::HINT_NONE);
static PropertyInfo uniform_to_property_info(const ShaderNode::Uniform &p_uniform);
static uint32_t get_datatype_size(DataType p_type);
static uint32_t get_datatype_component_count(DataType p_type);
static void get_keyword_list(List<String> *r_keywords);
static bool is_control_flow_keyword(String p_keyword);
static void get_builtin_funcs(List<String> *r_keywords);
static int instance_counter;
struct BuiltInInfo {
DataType type = TYPE_VOID;
bool constant = false;
BuiltInInfo() {}
BuiltInInfo(DataType p_type, bool p_constant = false) :
type(p_type),
constant(p_constant) {}
};
struct StageFunctionInfo {
struct Argument {
StringName name;
DataType type;
Argument(const StringName &p_name = StringName(), DataType p_type = TYPE_VOID) {
name = p_name;
type = p_type;
}
};
Vector<Argument> arguments;
DataType return_type = TYPE_VOID;
};
struct ModeInfo {
StringName name;
Vector<StringName> options;
ModeInfo() {}
ModeInfo(const StringName &p_name) :
name(p_name) {
}
ModeInfo(const StringName &p_name, const StringName &p_arg1, const StringName &p_arg2) :
name(p_name) {
options.push_back(p_arg1);
options.push_back(p_arg2);
}
ModeInfo(const StringName &p_name, const StringName &p_arg1, const StringName &p_arg2, const StringName &p_arg3) :
name(p_name) {
options.push_back(p_arg1);
options.push_back(p_arg2);
options.push_back(p_arg3);
}
ModeInfo(const StringName &p_name, const StringName &p_arg1, const StringName &p_arg2, const StringName &p_arg3, const StringName &p_arg4) :
name(p_name) {
options.push_back(p_arg1);
options.push_back(p_arg2);
options.push_back(p_arg3);
options.push_back(p_arg4);
}
ModeInfo(const StringName &p_name, const StringName &p_arg1, const StringName &p_arg2, const StringName &p_arg3, const StringName &p_arg4, const StringName &p_arg5) :
name(p_name) {
options.push_back(p_arg1);
options.push_back(p_arg2);
options.push_back(p_arg3);
options.push_back(p_arg4);
options.push_back(p_arg5);
}
ModeInfo(const StringName &p_name, const StringName &p_arg1, const StringName &p_arg2, const StringName &p_arg3, const StringName &p_arg4, const StringName &p_arg5, const StringName &p_arg6) :
name(p_name) {
options.push_back(p_arg1);
options.push_back(p_arg2);
options.push_back(p_arg3);
options.push_back(p_arg4);
options.push_back(p_arg5);
options.push_back(p_arg6);
}
};
struct FunctionInfo {
HashMap<StringName, BuiltInInfo> built_ins;
HashMap<StringName, StageFunctionInfo> stage_functions;
bool can_discard = false;
bool main_function = false;
};
static bool has_builtin(const HashMap<StringName, ShaderLanguage::FunctionInfo> &p_functions, const StringName &p_name, bool p_check_global_funcs = false);
typedef DataType (*GlobalShaderUniformGetTypeFunc)(const StringName &p_name);
struct FilePosition {
String file;
int line = 0;
};
private:
struct KeyWord {
TokenType token;
const char *text;
uint32_t flags;
const Vector<String> excluded_shader_types;
const Vector<String> functions;
};
static const KeyWord keyword_list[];
GlobalShaderUniformGetTypeFunc global_shader_uniform_get_type_func = nullptr;
bool error_set = false;
String error_str;
int error_line = 0;
Vector<FilePosition> include_positions;
HashSet<String> include_markers_handled;
// Additional function information (eg. call hierarchy). No need to expose it to compiler.
struct CallInfo {
struct Item {
enum ItemType {
ITEM_TYPE_BUILTIN,
ITEM_TYPE_VARYING,
} type;
TkPos pos;
Item() {}
Item(ItemType p_type, TkPos p_pos) :
type(p_type), pos(p_pos) {}
};
StringName name;
List<Pair<StringName, Item>> uses_restricted_items;
List<CallInfo *> calls;
};
RBMap<StringName, CallInfo> calls_info;
#ifdef DEBUG_ENABLED
struct Usage {
int decl_line;
bool used = false;
Usage(int p_decl_line = -1) {
decl_line = p_decl_line;
}
};
HashMap<StringName, Usage> used_constants;
HashMap<StringName, Usage> used_varyings;
HashMap<StringName, Usage> used_uniforms;
HashMap<StringName, Usage> used_functions;
HashMap<StringName, Usage> used_structs;
HashMap<ShaderWarning::Code, HashMap<StringName, Usage> *> warnings_check_map;
HashMap<StringName, HashMap<StringName, Usage>> used_local_vars;
HashMap<ShaderWarning::Code, HashMap<StringName, HashMap<StringName, Usage>> *> warnings_check_map2;
List<ShaderWarning> warnings;
bool check_warnings = false;
uint32_t warning_flags = 0;
void _add_line_warning(ShaderWarning::Code p_code, const StringName &p_subject = "", const Vector<Variant> &p_extra_args = Vector<Variant>()) {
warnings.push_back(ShaderWarning(p_code, tk_line, p_subject, p_extra_args));
}
void _add_global_warning(ShaderWarning::Code p_code, const StringName &p_subject = "", const Vector<Variant> &p_extra_args = Vector<Variant>()) {
warnings.push_back(ShaderWarning(p_code, -1, p_subject, p_extra_args));
}
void _add_warning(ShaderWarning::Code p_code, int p_line, const StringName &p_subject = "", const Vector<Variant> &p_extra_args = Vector<Variant>()) {
warnings.push_back(ShaderWarning(p_code, p_line, p_subject, p_extra_args));
}
void _check_warning_accums();
#endif // DEBUG_ENABLED
String code;
int char_idx = 0;
int tk_line = 0;
StringName shader_type_identifier;
StringName current_function;
bool is_const_decl = false;
StringName last_name;
bool is_shader_inc = false;
String current_uniform_group_name;
String current_uniform_subgroup_name;
VaryingFunctionNames varying_function_names;
TkPos _get_tkpos() {
TkPos tkp;
tkp.char_idx = char_idx;
tkp.tk_line = tk_line;
return tkp;
}
void _set_tkpos(TkPos p_pos) {
char_idx = p_pos.char_idx;
tk_line = p_pos.tk_line;
}
void _set_error(const String &p_str) {
if (error_set) {
return;
}
error_line = tk_line;
error_set = true;
error_str = p_str;
include_positions.write[include_positions.size() - 1].line = tk_line;
}
void _set_expected_error(const String &p_what) {
_set_error(vformat(RTR("Expected a '%s'."), p_what));
}
void _set_expected_error(const String &p_first, const String p_second) {
_set_error(vformat(RTR("Expected a '%s' or '%s'."), p_first, p_second));
}
void _set_expected_after_error(const String &p_what, const String &p_after) {
_set_error(vformat(RTR("Expected a '%s' after '%s'."), p_what, p_after));
}
void _set_redefinition_error(const String &p_what) {
_set_error(vformat(RTR("Redefinition of '%s'."), p_what));
}
void _set_parsing_error() {
_set_error("Parser bug.");
}
static const char *token_names[TK_MAX];
Token _make_token(TokenType p_type, const StringName &p_text = StringName());
Token _get_token();
bool _lookup_next(Token &r_tk);
Token _peek();
ShaderNode *shader = nullptr;
enum IdentifierType {
IDENTIFIER_FUNCTION,
IDENTIFIER_UNIFORM,
IDENTIFIER_VARYING,
IDENTIFIER_FUNCTION_ARGUMENT,
IDENTIFIER_LOCAL_VAR,
IDENTIFIER_BUILTIN_VAR,
IDENTIFIER_CONSTANT,
IDENTIFIER_MAX,
};
IdentifierType last_type = IDENTIFIER_MAX;
bool _find_identifier(const BlockNode *p_block, bool p_allow_reassign, const FunctionInfo &p_function_info, const StringName &p_identifier, DataType *r_data_type = nullptr, IdentifierType *r_type = nullptr, bool *r_is_const = nullptr, int *r_array_size = nullptr, StringName *r_struct_name = nullptr, Vector<Scalar> *r_constant_values = nullptr);
#ifdef DEBUG_ENABLED
void _parse_used_identifier(const StringName &p_identifier, IdentifierType p_type, const StringName &p_function);
#endif // DEBUG_ENABLED
bool _is_operator_assign(Operator p_op) const;
bool _validate_assign(Node *p_node, const FunctionInfo &p_function_info, String *r_message = nullptr);
bool _validate_operator(const BlockNode *p_block, OperatorNode *p_op, DataType *r_ret_type = nullptr, int *r_ret_size = nullptr);
Vector<Scalar> _get_node_values(const BlockNode *p_block, Node *p_node);
bool _eval_operator(const BlockNode *p_block, OperatorNode *p_op);
Scalar _eval_unary_scalar(const Scalar &p_a, Operator p_op, DataType p_ret_type);
Scalar _eval_scalar(const Scalar &p_a, const Scalar &p_b, Operator p_op, DataType p_ret_type, bool &r_is_valid);
Vector<Scalar> _eval_unary_vector(const Vector<Scalar> &p_va, DataType p_ret_type, Operator p_op);
Vector<Scalar> _eval_vector(const Vector<Scalar> &p_va, const Vector<Scalar> &p_vb, DataType p_left_type, DataType p_right_type, DataType p_ret_type, Operator p_op, bool &r_is_valid);
Vector<Scalar> _eval_vector_transform(const Vector<Scalar> &p_va, const Vector<Scalar> &p_vb, DataType p_left_type, DataType p_right_type, DataType p_ret_type);
struct BuiltinEntry {
const char *name;
};
struct BuiltinFuncDef {
enum { MAX_ARGS = 5 };
const char *name;
DataType rettype;
const DataType args[MAX_ARGS];
const char *args_names[MAX_ARGS];
SubClassTag tag;
bool high_end;
};
struct BuiltinFuncOutArgs { //arguments used as out in built in functions
enum { MAX_ARGS = 2 };
const char *name;
const int arguments[MAX_ARGS];
};
struct BuiltinFuncConstArgs {
const char *name;
int arg;
int min;
int max;
};
CompletionType completion_type;
ShaderNode::Uniform::Hint current_uniform_hint = ShaderNode::Uniform::HINT_NONE;
TextureFilter current_uniform_filter = FILTER_DEFAULT;
TextureRepeat current_uniform_repeat = REPEAT_DEFAULT;
bool current_uniform_instance_index_defined = false;
int completion_line = 0;
BlockNode *completion_block = nullptr;
DataType completion_base;
bool completion_base_array = false;
SubClassTag completion_class;
StringName completion_function;
StringName completion_struct;
int completion_argument = 0;
#ifdef DEBUG_ENABLED
uint32_t keyword_completion_context;
#endif // DEBUG_ENABLED
const HashMap<StringName, FunctionInfo> *stages = nullptr;
bool is_supported_frag_only_funcs = false;
bool _get_completable_identifier(BlockNode *p_block, CompletionType p_type, StringName &identifier);
static const BuiltinFuncDef builtin_func_defs[];
static const BuiltinFuncOutArgs builtin_func_out_args[];
static const BuiltinFuncConstArgs builtin_func_const_args[];
static const BuiltinEntry frag_only_func_defs[];
static bool is_const_suffix_lut_initialized;
Error _validate_precision(DataType p_type, DataPrecision p_precision);
bool _compare_datatypes(DataType p_datatype_a, String p_datatype_name_a, int p_array_size_a, DataType p_datatype_b, String p_datatype_name_b, int p_array_size_b);
bool _compare_datatypes_in_nodes(Node *a, Node *b);
bool _validate_function_call(BlockNode *p_block, const FunctionInfo &p_function_info, OperatorNode *p_func, DataType *r_ret_type, StringName *r_ret_type_str, bool *r_is_custom_function = nullptr);
bool _parse_function_arguments(BlockNode *p_block, const FunctionInfo &p_function_info, OperatorNode *p_func, int *r_complete_arg = nullptr);
ShaderNode::Uniform::Hint _sanitize_hint(ShaderNode::Uniform::Hint p_hint);
bool _propagate_function_call_sampler_uniform_settings(const StringName &p_name, int p_argument, TextureFilter p_filter, TextureRepeat p_repeat, ShaderNode::Uniform::Hint p_hint);
bool _propagate_function_call_sampler_builtin_reference(const StringName &p_name, int p_argument, const StringName &p_builtin);
bool _validate_varying_assign(ShaderNode::Varying &p_varying, String *r_message);
bool _check_node_constness(const Node *p_node) const;
bool _check_restricted_func(const StringName &p_name, const StringName &p_current_function) const;
bool _validate_restricted_func(const StringName &p_call_name, const CallInfo *p_func_info, bool p_is_builtin_hint = false);
Node *_parse_expression(BlockNode *p_block, const FunctionInfo &p_function_info, const ExpressionInfo *p_previous_expression_info = nullptr);
Error _parse_array_size(BlockNode *p_block, const FunctionInfo &p_function_info, bool p_forbid_unknown_size, Node **r_size_expression, int *r_array_size, bool *r_unknown_size);
Node *_parse_array_constructor(BlockNode *p_block, const FunctionInfo &p_function_info);
Node *_parse_array_constructor(BlockNode *p_block, const FunctionInfo &p_function_info, DataType p_type, const StringName &p_struct_name, int p_array_size);
ShaderLanguage::Node *_reduce_expression(BlockNode *p_block, ShaderLanguage::Node *p_node);
Node *_parse_and_reduce_expression(BlockNode *p_block, const FunctionInfo &p_function_info, const ExpressionInfo *p_previous_expression_info = nullptr);
Error _parse_block(BlockNode *p_block, const FunctionInfo &p_function_info, bool p_just_one = false, bool p_can_break = false, bool p_can_continue = false);
String _get_shader_type_list(const HashSet<String> &p_shader_types) const;
String _get_qualifier_str(ArgumentQualifier p_qualifier) const;
Error _parse_shader(const HashMap<StringName, FunctionInfo> &p_functions, const Vector<ModeInfo> &p_render_modes, const HashSet<String> &p_shader_types);
Error _find_last_flow_op_in_block(BlockNode *p_block, FlowOperation p_op);
Error _find_last_flow_op_in_op(ControlFlowNode *p_flow, FlowOperation p_op);
public:
#ifdef DEBUG_ENABLED
List<ShaderWarning>::Element *get_warnings_ptr();
void enable_warning_checking(bool p_enabled);
bool is_warning_checking_enabled() const;
void set_warning_flags(uint32_t p_flags);
uint32_t get_warning_flags() const;
#endif // DEBUG_ENABLED
//static void get_keyword_list(ShaderType p_type,List<String> *p_keywords);
void clear();
static String get_shader_type(const String &p_code);
static bool is_builtin_func_out_parameter(const String &p_name, int p_param);
struct ShaderCompileInfo {
HashMap<StringName, FunctionInfo> functions;
Vector<ModeInfo> render_modes;
VaryingFunctionNames varying_function_names = VaryingFunctionNames();
HashSet<String> shader_types;
GlobalShaderUniformGetTypeFunc global_shader_uniform_type_func = nullptr;
bool is_include = false;
};
Error compile(const String &p_code, const ShaderCompileInfo &p_info);
Error complete(const String &p_code, const ShaderCompileInfo &p_info, List<ScriptLanguage::CodeCompletionOption> *r_options, String &r_call_hint);
String get_error_text();
Vector<FilePosition> get_include_positions();
int get_error_line();
ShaderNode *get_shader();
String token_debug(const String &p_code);
ShaderLanguage();
~ShaderLanguage();
};
#endif // SHADER_LANGUAGE_H
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