429 lines
10 KiB
C++
429 lines
10 KiB
C++
/*************************************************************************/
|
|
/* shader_language.h */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* http://www.godotengine.org */
|
|
/*************************************************************************/
|
|
/* 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 "typedefs.h"
|
|
#include "ustring.h"
|
|
#include "list.h"
|
|
#include "string_db.h"
|
|
#include "map.h"
|
|
#include "variant.h"
|
|
|
|
|
|
class ShaderLanguage {
|
|
|
|
|
|
|
|
public:
|
|
|
|
enum TokenType {
|
|
|
|
TK_EMPTY,
|
|
TK_INDENTIFIER,
|
|
TK_TRUE,
|
|
TK_FALSE,
|
|
TK_REAL_CONSTANT,
|
|
TK_TYPE_VOID,
|
|
TK_TYPE_BOOL,
|
|
TK_TYPE_FLOAT,
|
|
TK_TYPE_VEC2,
|
|
TK_TYPE_VEC3,
|
|
TK_TYPE_VEC4,
|
|
TK_TYPE_MAT3,
|
|
TK_TYPE_MAT4,
|
|
TK_TYPE_TEXTURE,
|
|
TK_TYPE_CUBEMAP,
|
|
TK_TYPE_COLOR,
|
|
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_NEG,
|
|
TK_OP_ASSIGN,
|
|
TK_OP_ASSIGN_ADD,
|
|
TK_OP_ASSIGN_SUB,
|
|
TK_OP_ASSIGN_MUL,
|
|
TK_OP_ASSIGN_DIV,
|
|
TK_CF_IF,
|
|
TK_CF_ELSE,
|
|
TK_CF_RETURN,
|
|
TK_BRACKET_OPEN,
|
|
TK_BRACKET_CLOSE,
|
|
TK_CURLY_BRACKET_OPEN,
|
|
TK_CURLY_BRACKET_CLOSE,
|
|
TK_PARENTHESIS_OPEN,
|
|
TK_PARENTHESIS_CLOSE,
|
|
TK_COMMA,
|
|
TK_SEMICOLON,
|
|
TK_PERIOD,
|
|
TK_UNIFORM,
|
|
TK_ERROR,
|
|
TK_MAX
|
|
};
|
|
|
|
|
|
|
|
/* COMPILER */
|
|
|
|
enum ShaderType {
|
|
SHADER_MATERIAL_VERTEX,
|
|
SHADER_MATERIAL_FRAGMENT,
|
|
SHADER_MATERIAL_LIGHT,
|
|
SHADER_CANVAS_ITEM_VERTEX,
|
|
SHADER_CANVAS_ITEM_FRAGMENT,
|
|
SHADER_CANVAS_ITEM_LIGHT,
|
|
SHADER_POST_PROCESS,
|
|
};
|
|
|
|
enum DataType {
|
|
TYPE_VOID,
|
|
TYPE_BOOL,
|
|
TYPE_FLOAT,
|
|
TYPE_VEC2,
|
|
TYPE_VEC3,
|
|
TYPE_VEC4,
|
|
TYPE_MAT3,
|
|
TYPE_MAT4,
|
|
TYPE_TEXTURE,
|
|
TYPE_CUBEMAP,
|
|
};
|
|
|
|
enum Operator {
|
|
OP_ASSIGN,
|
|
OP_ADD,
|
|
OP_SUB,
|
|
OP_MUL,
|
|
OP_DIV,
|
|
OP_ASSIGN_ADD,
|
|
OP_ASSIGN_SUB,
|
|
OP_ASSIGN_MUL,
|
|
OP_ASSIGN_DIV,
|
|
OP_NEG,
|
|
OP_NOT,
|
|
OP_CMP_EQ,
|
|
OP_CMP_NEQ,
|
|
OP_CMP_LEQ,
|
|
OP_CMP_GEQ,
|
|
OP_CMP_LESS,
|
|
OP_CMP_GREATER,
|
|
OP_CMP_OR,
|
|
OP_CMP_AND,
|
|
OP_CALL,
|
|
OP_CONSTRUCT,
|
|
OP_MAX
|
|
};
|
|
|
|
enum FlowOperation {
|
|
FLOW_OP_IF,
|
|
FLOW_OP_RETURN,
|
|
//FLOW_OP_FOR,
|
|
//FLOW_OP_WHILE,
|
|
//FLOW_OP_DO,
|
|
//FLOW_OP_BREAK,
|
|
//FLOW_OP_CONTINUE,
|
|
|
|
};
|
|
|
|
struct Node {
|
|
|
|
enum Type {
|
|
TYPE_PROGRAM,
|
|
TYPE_FUNCTION,
|
|
TYPE_BLOCK,
|
|
TYPE_VARIABLE,
|
|
TYPE_CONSTANT,
|
|
TYPE_OPERATOR,
|
|
TYPE_CONTROL_FLOW,
|
|
TYPE_MEMBER
|
|
};
|
|
|
|
Node * parent;
|
|
Type type;
|
|
|
|
virtual DataType get_datatype() const { return TYPE_VOID; }
|
|
|
|
virtual ~Node() {}
|
|
};
|
|
|
|
|
|
struct OperatorNode : public Node {
|
|
|
|
DataType return_cache;
|
|
Operator op;
|
|
Vector<Node*> arguments;
|
|
virtual DataType get_datatype() const { return return_cache; }
|
|
|
|
OperatorNode() { type=TYPE_OPERATOR; return_cache=TYPE_VOID; }
|
|
};
|
|
|
|
struct VariableNode : public Node {
|
|
bool uniform;
|
|
DataType datatype_cache;
|
|
StringName name;
|
|
virtual DataType get_datatype() const { return datatype_cache; }
|
|
|
|
VariableNode() { type=TYPE_VARIABLE; datatype_cache=TYPE_VOID; uniform=false; }
|
|
};
|
|
|
|
struct ConstantNode : public Node {
|
|
|
|
DataType datatype;
|
|
Variant value;
|
|
virtual DataType get_datatype() const { return datatype; }
|
|
|
|
ConstantNode() { type=TYPE_CONSTANT; }
|
|
};
|
|
|
|
struct BlockNode : public Node {
|
|
|
|
Map<StringName,DataType> variables;
|
|
List<Node*> statements;
|
|
BlockNode() { type=TYPE_BLOCK; }
|
|
};
|
|
|
|
struct ControlFlowNode : public Node {
|
|
|
|
FlowOperation flow_op;
|
|
Vector<Node*> statements;
|
|
ControlFlowNode() { type=TYPE_CONTROL_FLOW; flow_op=FLOW_OP_IF;}
|
|
};
|
|
|
|
struct MemberNode : public Node {
|
|
|
|
DataType basetype;
|
|
DataType datatype;
|
|
StringName name;
|
|
Node* owner;
|
|
virtual DataType get_datatype() const { return datatype; }
|
|
MemberNode() { type=TYPE_MEMBER; }
|
|
};
|
|
|
|
|
|
struct FunctionNode : public Node {
|
|
|
|
|
|
struct Argument {
|
|
|
|
StringName name;
|
|
DataType type;
|
|
};
|
|
|
|
StringName name;
|
|
DataType return_type;
|
|
Vector<Argument> arguments;
|
|
BlockNode *body;
|
|
|
|
FunctionNode() { type=TYPE_FUNCTION; }
|
|
|
|
};
|
|
|
|
struct Uniform {
|
|
|
|
int order;
|
|
DataType type;
|
|
Variant default_value;
|
|
};
|
|
|
|
struct ProgramNode : public Node {
|
|
|
|
struct Function {
|
|
StringName name;
|
|
FunctionNode*function;
|
|
};
|
|
|
|
|
|
Map<StringName,DataType> builtin_variables;
|
|
Map<StringName,Uniform> uniforms;
|
|
|
|
Vector<Function> functions;
|
|
BlockNode *body;
|
|
|
|
ProgramNode() { type=TYPE_PROGRAM; }
|
|
};
|
|
|
|
|
|
struct Expression {
|
|
|
|
bool is_op;
|
|
union {
|
|
TokenType op;
|
|
Node *node;
|
|
};
|
|
};
|
|
|
|
typedef Error (*CompileFunc)(void*,ProgramNode*);
|
|
|
|
struct VarInfo {
|
|
|
|
StringName name;
|
|
DataType type;
|
|
};
|
|
|
|
private:
|
|
|
|
|
|
|
|
static const char * token_names[TK_MAX];
|
|
|
|
struct Token {
|
|
|
|
TokenType type;
|
|
StringName text;
|
|
uint16_t line,col;
|
|
|
|
Token(TokenType p_type=TK_EMPTY,const String& p_text=String()) { type=p_type; text=p_text; line=0; col=0; }
|
|
};
|
|
|
|
|
|
|
|
static Token read_token(const CharType* p_text,int p_len,int &r_line,int &r_chars);
|
|
static Error tokenize(const String& p_text,Vector<Token> *p_tokens,String *r_error,int *r_err_line,int *r_err_column);
|
|
|
|
|
|
|
|
|
|
class Parser {
|
|
|
|
Vector<Token> tokens;
|
|
int pos;
|
|
String error;
|
|
public:
|
|
|
|
|
|
void set_error(const String& p_error) { error=p_error; }
|
|
void get_error(String *r_error, int *r_line, int *r_column) {
|
|
|
|
*r_error=error;
|
|
*r_line=get_token(pos).line;
|
|
*r_column=get_token(pos).col;
|
|
}
|
|
|
|
|
|
|
|
Token get_token(int ofs=0) const { int idx=pos+ofs; if (idx<0 || idx>=tokens.size()) return Token(TK_ERROR); return tokens[idx]; }
|
|
TokenType get_token_type(int ofs=0) const { int idx=pos+ofs; if (idx<0 || idx>=tokens.size()) return TK_ERROR; return tokens[idx].type; }
|
|
void advance(int p_amount=1) { pos+=p_amount; }
|
|
bool is_at_end() const { return pos>=tokens.size(); }
|
|
|
|
ProgramNode *program;
|
|
template<class T>
|
|
T* create_node(Node *p_parent) { T*n=memnew( T ); nodegc.push_back(n); n->parent=p_parent; return n; }
|
|
List<Node*> nodegc;
|
|
|
|
Parser(const Vector<Token>& p_tokens) { tokens=p_tokens; pos=0;}
|
|
};
|
|
|
|
struct IntrinsicFuncDef {
|
|
|
|
enum { MAX_ARGS=5 };
|
|
const char* name;
|
|
DataType rettype;
|
|
const DataType args[MAX_ARGS];
|
|
|
|
};
|
|
|
|
static const IntrinsicFuncDef intrinsic_func_defs[];
|
|
|
|
struct OperatorDef {
|
|
|
|
enum { MAX_ARGS=2 };
|
|
Operator op;
|
|
DataType rettype;
|
|
const DataType args[MAX_ARGS];
|
|
};
|
|
|
|
static const OperatorDef operator_defs[];
|
|
|
|
struct BuiltinsDef {
|
|
|
|
const char* name;
|
|
DataType type;
|
|
};
|
|
|
|
static const BuiltinsDef vertex_builtins_defs[];
|
|
static const BuiltinsDef fragment_builtins_defs[];
|
|
static const BuiltinsDef light_builtins_defs[];
|
|
|
|
static const BuiltinsDef ci_vertex_builtins_defs[];
|
|
static const BuiltinsDef ci_fragment_builtins_defs[];
|
|
static const BuiltinsDef ci_light_builtins_defs[];
|
|
|
|
|
|
static const BuiltinsDef postprocess_fragment_builtins_defs[];
|
|
|
|
static DataType get_token_datatype(TokenType p_type);
|
|
static String get_datatype_name(DataType p_type);
|
|
static bool is_token_datatype(TokenType p_type);
|
|
static bool is_token_nonvoid_datatype(TokenType p_type);
|
|
|
|
static bool test_existing_identifier(Node *p_node,const StringName p_identifier,bool p_func=true,bool p_var=true,bool p_builtin=true);
|
|
|
|
static bool parser_is_at_function(Parser& parser);
|
|
static DataType compute_node_type(Node *p_node);
|
|
|
|
static Node* validate_function_call(Parser&parser, OperatorNode *p_func);
|
|
static Node* validate_operator(Parser& parser,OperatorNode *p_func);
|
|
static bool is_token_operator(TokenType p_type);
|
|
static Operator get_token_operator(TokenType p_type);
|
|
|
|
static Error parse_expression(Parser& parser,Node *p_parent,Node **r_expr);
|
|
|
|
static Error parse_variable_declaration(Parser& parser,BlockNode *p_block);
|
|
static Error parse_function(Parser& parser,BlockNode *p_block);
|
|
static Error parse_flow_if(Parser& parser,Node *p_parent,Node **r_statement);
|
|
static Error parse_flow_return(Parser& parser,Node *p_parent,Node **r_statement);
|
|
static Error parse_statement(Parser& parser,Node *p_parent,Node **r_statement);
|
|
static Error parse_block(Parser& parser,BlockNode *p_block);
|
|
|
|
|
|
static Error parse(const Vector<Token> &p_tokens,ShaderType p_type,CompileFunc p_compile_func,void *p_userdata,String *r_error,int *r_err_line,int *r_err_column);
|
|
|
|
;
|
|
public:
|
|
|
|
static void get_keyword_list(ShaderType p_type,List<String> *p_keywords);
|
|
|
|
static Error compile(const String& p_code,ShaderType p_type, CompileFunc p_compile_func,void *p_userdata,String *r_error,int *r_err_line,int *r_err_column);
|
|
static String lex_debug(const String& p_code);
|
|
|
|
};
|
|
|
|
|
|
#endif // SHADER_LANGUAGE_H
|