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godot/servers/visual/shader_language.cpp
Pedro J. Estébanez 184ef18420 Add optimizing AT_LIGHT_PASS builtin to canvas shaders 
This one allows for complex shaders paired with a simple lighting shader to skip code that would otherwise be pointlessly (and wastefully) run during the light pass.
You can use `if (AT_LIGHT_PASS) , negated or not, and that will be converted to a preprocessed #if when the shader is compiled.
Depending on your game (number of items and lights), this can be a *significant* performance gain, or at least avoids relying on the driver's optimizing abilities.
2017-06-15 02:03:25 +02:00

2673 lines
75 KiB
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/*************************************************************************/
/* shader_language.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 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_language.h"
#include "os/os.h"
#include "print_string.h"
static bool _is_text_char(CharType c) {
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || c == '_';
}
static bool _is_number(CharType c) {
return (c >= '0' && c <= '9');
}
static bool _is_hex(CharType c) {
return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
}
const char *ShaderLanguage::token_names[TK_MAX] = {
"EMPTY",
"INDENTIFIER",
"TRUE",
"FALSE",
"REAL_CONSTANT",
"TYPE_VOID",
"TYPE_BOOL",
"TYPE_FLOAT",
"TYPE_VEC2",
"TYPE_VEC3",
"TYPE_VEC4",
"TYPE_MAT2",
"TYPE_MAT3",
"TYPE_MAT4",
"TYPE_TEXTURE",
"TYPE_CUBEMAP",
"TYPE_COLOR",
"OP_EQUAL",
"OP_NOT_EQUAL",
"OP_LESS",
"OP_LESS_EQUAL",
"OP_GREATER",
"OP_GREATER_EQUAL",
"OP_AND",
"OP_OR",
"OP_NOT",
"OP_ADD",
"OP_SUB",
"OP_MUL",
"OP_DIV",
"OP_NEG",
"OP_ASSIGN",
"OP_ASSIGN_ADD",
"OP_ASSIGN_SUB",
"OP_ASSIGN_MUL",
"OP_ASSIGN_DIV",
"CF_IF",
"CF_ELSE",
"CF_RETURN",
"BRACKET_OPEN",
"BRACKET_CLOSE",
"CURLY_BRACKET_OPEN",
"CURLY_BRACKET_CLOSE",
"PARENTHESIS_OPEN",
"PARENTHESIS_CLOSE",
"COMMA",
"SEMICOLON",
"PERIOD",
"UNIFORM",
"ERROR",
};
ShaderLanguage::Token ShaderLanguage::read_token(const CharType *p_text, int p_len, int &r_line, int &r_chars) {
#define GETCHAR(m_idx) ((m_idx < p_len) ? p_text[m_idx] : CharType(0))
r_chars = 1; //by default everything eats one char
switch (GETCHAR(0)) {
case '\t':
case '\r':
case ' ':
return Token();
case '\n':
r_line++;
return Token();
case '/': {
switch (GETCHAR(1)) {
case '*': { // block comment
while (true) {
if (GETCHAR(r_chars + 1) == 0) {
r_chars += 1;
break;
}
if (GETCHAR(r_chars + 1) == '*' && GETCHAR(r_chars + 2) == '/') {
r_chars += 3;
break;
}
if (GETCHAR(r_chars + 1) == '\n') {
r_line++;
}
r_chars++;
}
return Token();
} break;
case '/': { // line comment skip
while (GETCHAR(r_chars + 1) != '\n' && GETCHAR(r_chars + 1) != 0) {
r_chars++;
}
r_chars++;
//r_line++;
return Token();
} break;
case '=': { // diveq
r_chars = 2;
return Token(TK_OP_ASSIGN_DIV);
} break;
default:
return Token(TK_OP_DIV);
}
} break;
case '=': {
if (GETCHAR(1) == '=') {
r_chars++;
return Token(TK_OP_EQUAL);
}
return Token(TK_OP_ASSIGN);
} break;
case '<': {
if (GETCHAR(1) == '=') {
r_chars++;
return Token(TK_OP_LESS_EQUAL);
} /*else if (GETCHAR(1)=='<') {
r_chars++;
if (GETCHAR(2)=='=') {
r_chars++;
return Token(TK_OP_ASSIGN_SHIFT_LEFT);
}
return Token(TK_OP_SHIFT_LEFT);
}*/
return Token(TK_OP_LESS);
} break;
case '>': {
if (GETCHAR(1) == '=') {
r_chars++;
return Token(TK_OP_GREATER_EQUAL);
} /* else if (GETCHAR(1)=='<') {
r_chars++;
if (GETCHAR(2)=='=') {
r_chars++;
return Token(TK_OP_ASSIGN_SHIFT_RIGHT);
}
return Token(TK_OP_SHIFT_RIGHT);
}*/
return Token(TK_OP_GREATER);
} break;
case '!': {
if (GETCHAR(1) == '=') {
r_chars++;
return Token(TK_OP_NOT_EQUAL);
}
return Token(TK_OP_NOT);
} break;
//case '"' //string - no strings in shader
//case '\'' //string - no strings in shader
case '{':
return Token(TK_CURLY_BRACKET_OPEN);
case '}':
return Token(TK_CURLY_BRACKET_CLOSE);
//case '[':
// return Token(TK_BRACKET_OPEN);
//case ']':
// return Token(TK_BRACKET_CLOSE);
case '(':
return Token(TK_PARENTHESIS_OPEN);
case ')':
return Token(TK_PARENTHESIS_CLOSE);
case ',':
return Token(TK_COMMA);
case ';':
return Token(TK_SEMICOLON);
//case '?':
// return Token(TK_QUESTION_MARK);
//case ':':
// return Token(TK_COLON); //for methods maybe but now useless.
//case '^':
// return Token(TK_OP_BIT_XOR);
//case '~':
// return Token(TK_OP_BIT_INVERT);
case '&': {
if (GETCHAR(1) == '&') {
r_chars++;
return Token(TK_OP_AND);
}
return Token(TK_ERROR, "Unknown character");
/*
if (GETCHAR(1)=='=') {
r_chars++;
return Token(TK_OP_ASSIGN_BIT_AND);
} else if (GETCHAR(1)=='&') {
r_chars++;
return Token(TK_OP_AND);
}
return TK_OP_BIT_AND;*/
} break;
case '|': {
if (GETCHAR(1) == '|') {
r_chars++;
return Token(TK_OP_OR);
}
return Token(TK_ERROR, "Unknown character");
/*
if (GETCHAR(1)=='=') {
r_chars++;
return Token(TK_OP_ASSIGN_BIT_OR);
} else if (GETCHAR(1)=='|') {
r_chars++;
return Token(TK_OP_OR);
}
return TK_OP_BIT_OR;
*/
} break;
case '*': {
if (GETCHAR(1) == '=') {
r_chars++;
return Token(TK_OP_ASSIGN_MUL);
}
return TK_OP_MUL;
} break;
case '+': {
if (GETCHAR(1) == '=') {
r_chars++;
return Token(TK_OP_ASSIGN_ADD);
} /*else if (GETCHAR(1)=='+') {
r_chars++;
return Token(TK_OP_PLUS_PLUS);
}*/
return TK_OP_ADD;
} break;
case '-': {
if (GETCHAR(1) == '=') {
r_chars++;
return Token(TK_OP_ASSIGN_SUB);
} /* else if (GETCHAR(1)=='-') {
r_chars++;
return Token(TK_OP_MINUS_MINUS);
}*/
return TK_OP_SUB;
} break;
/*case '%': {
if (GETCHAR(1)=='=') {
r_chars++;
return Token(TK_OP_ASSIGN_MOD);
}
return TK_OP_MOD;
} break;*/
default: {
if (_is_number(GETCHAR(0)) || (GETCHAR(0) == '.' && _is_number(GETCHAR(1)))) {
// parse number
bool period_found = false;
bool exponent_found = false;
bool hexa_found = false;
bool sign_found = false;
String str;
int i = 0;
while (true) {
if (GETCHAR(i) == '.') {
if (period_found || exponent_found)
return Token(TK_ERROR, "Invalid numeric constant");
period_found = true;
} else if (GETCHAR(i) == 'x') {
if (hexa_found || str.length() != 1 || str[0] != '0')
return Token(TK_ERROR, "Invalid numeric constant");
hexa_found = true;
} else if (GETCHAR(i) == 'e') {
if (hexa_found || exponent_found)
return Token(TK_ERROR, "Invalid numeric constant");
exponent_found = true;
} else if (_is_number(GETCHAR(i))) {
//all ok
} else if (hexa_found && _is_hex(GETCHAR(i))) {
} else if ((GETCHAR(i) == '-' || GETCHAR(i) == '+') && exponent_found) {
if (sign_found)
return Token(TK_ERROR, "Invalid numeric constant");
sign_found = true;
} else
break;
str += CharType(GETCHAR(i));
i++;
}
if (!_is_number(str[str.length() - 1]))
return Token(TK_ERROR, "Invalid numeric constant");
r_chars += str.length() - 1;
return Token(TK_REAL_CONSTANT, str);
/*
if (period_found)
return Token(TK_NUMBER_REAL,str);
else
return Token(TK_NUMBER_INTEGER,str);*/
}
if (GETCHAR(0) == '.') {
//parse period
return Token(TK_PERIOD);
}
if (_is_text_char(GETCHAR(0))) {
// parse identifier
String str;
str += CharType(GETCHAR(0));
while (_is_text_char(GETCHAR(r_chars))) {
str += CharType(GETCHAR(r_chars));
r_chars++;
}
//see if keyword
struct _kws {
TokenType token;
const char *text;
};
static const _kws keyword_list[] = {
{ TK_TRUE, "true" },
{ TK_FALSE, "false" },
{ TK_TYPE_VOID, "void" },
{ TK_TYPE_BOOL, "bool" },
/*{TK_TYPE_INT,"int"},
{TK_TYPE_INT2,"int2"},
{TK_TYPE_INT3,"int3"},
{TK_TYPE_INT4,"int4"},*/
{ TK_TYPE_FLOAT, "float" },
/*{TK_TYPE_FLOAT2,"float2"},
{TK_TYPE_FLOAT3,"float3"},
{TK_TYPE_FLOAT4,"float4"},*/
{ TK_TYPE_VEC2, "vec2" },
{ TK_TYPE_VEC3, "vec3" },
{ TK_TYPE_VEC4, "vec4" },
{ TK_TYPE_TEXTURE, "texture" },
{ TK_TYPE_CUBEMAP, "cubemap" },
{ TK_TYPE_COLOR, "color" },
{ TK_TYPE_MAT2, "mat2" },
/*{TK_TYPE_MAT3,"mat3"},
{TK_TYPE_MAT4,"mat3"},*/
{ TK_TYPE_MAT3, "mat3" },
{ TK_TYPE_MAT4, "mat4" },
{ TK_CF_IF, "if" },
{ TK_CF_ELSE, "else" },
/*
{TK_CF_FOR,"for"},
{TK_CF_WHILE,"while"},
{TK_CF_DO,"do"},
{TK_CF_SWITCH,"switch"},
{TK_CF_BREAK,"break"},
{TK_CF_CONTINUE,"continue"},*/
{ TK_CF_RETURN, "return" },
{ TK_UNIFORM, "uniform" },
{ TK_ERROR, NULL }
};
int idx = 0;
while (keyword_list[idx].text) {
if (str == keyword_list[idx].text)
return Token(keyword_list[idx].token);
idx++;
}
return Token(TK_INDENTIFIER, str);
}
if (GETCHAR(0) > 32)
return Token(TK_ERROR, "Tokenizer: Unknown character #" + itos(GETCHAR(0)) + ": '" + String::chr(GETCHAR(0)) + "'");
else
return Token(TK_ERROR, "Tokenizer: Unknown character #" + itos(GETCHAR(0)));
} break;
}
ERR_PRINT("BUG");
return Token();
}
Error ShaderLanguage::tokenize(const String &p_text, Vector<Token> *p_tokens, String *r_error, int *r_err_line, int *r_err_column) {
int len = p_text.length();
int pos = 0;
int line = 0;
int col = 0;
while (pos < len) {
int advance = 0;
int prev_line = line;
Token t = read_token(&p_text[pos], len - pos, line, advance);
t.line = line;
t.col = col;
if (t.type == TK_ERROR) {
if (r_error) {
*r_error = t.text;
*r_err_line = line;
*r_err_column = col;
return ERR_COMPILATION_FAILED;
}
}
if (line == prev_line) {
col += advance;
} else {
col = 0;
//p_tokens->push_back(Token(TK_LINE,itos(line)))
}
if (t.type != TK_EMPTY)
p_tokens->push_back(t);
pos += advance;
}
return OK;
}
String ShaderLanguage::lex_debug(const String &p_code) {
Vector<Token> tokens;
String error;
int errline, errcol;
if (tokenize(p_code, &tokens, &error, &errline, &errcol) != OK)
return error;
String ret;
for (int i = 0; i < tokens.size(); i++) {
ret += String(token_names[tokens[i].type]) + ":" + itos(tokens[i].line) + ":" + itos(tokens[i].col) + ":" + tokens[i].text + "\n";
}
return ret;
}
bool ShaderLanguage::is_token_datatype(TokenType p_type) {
return (p_type == TK_TYPE_VOID) ||
(p_type == TK_TYPE_BOOL) ||
(p_type == TK_TYPE_FLOAT) ||
(p_type == TK_TYPE_VEC2) ||
(p_type == TK_TYPE_VEC3) ||
(p_type == TK_TYPE_VEC4) ||
(p_type == TK_TYPE_COLOR) ||
(p_type == TK_TYPE_MAT2) ||
(p_type == TK_TYPE_MAT3) ||
(p_type == TK_TYPE_MAT4) ||
(p_type == TK_TYPE_CUBEMAP) ||
(p_type == TK_TYPE_TEXTURE);
}
ShaderLanguage::DataType ShaderLanguage::get_token_datatype(TokenType p_type) {
switch (p_type) {
case TK_TYPE_VOID: return TYPE_VOID;
case TK_TYPE_BOOL: return TYPE_BOOL;
case TK_TYPE_FLOAT: return TYPE_FLOAT;
case TK_TYPE_VEC2: return TYPE_VEC2;
case TK_TYPE_VEC3: return TYPE_VEC3;
case TK_TYPE_VEC4: return TYPE_VEC4;
case TK_TYPE_COLOR: return TYPE_VEC4;
case TK_TYPE_MAT2: return TYPE_MAT2;
case TK_TYPE_MAT3: return TYPE_MAT3;
case TK_TYPE_MAT4: return TYPE_MAT4;
case TK_TYPE_TEXTURE: return TYPE_TEXTURE;
case TK_TYPE_CUBEMAP: return TYPE_CUBEMAP;
default: return TYPE_VOID;
}
return TYPE_VOID;
}
String ShaderLanguage::get_datatype_name(DataType p_type) {
switch (p_type) {
case TYPE_VOID: return "void";
case TYPE_BOOL: return "bool";
case TYPE_FLOAT: return "float";
case TYPE_VEC2: return "vec2";
case TYPE_VEC3: return "vec3";
case TYPE_VEC4: return "vec4";
case TYPE_MAT2: return "mat2";
case TYPE_MAT3: return "mat3";
case TYPE_MAT4: return "mat4";
case TYPE_TEXTURE: return "texture";
case TYPE_CUBEMAP: return "cubemap";
default: return "";
}
return "";
}
bool ShaderLanguage::is_token_nonvoid_datatype(TokenType p_type) {
return (p_type == TK_TYPE_BOOL) ||
(p_type == TK_TYPE_FLOAT) ||
(p_type == TK_TYPE_VEC2) ||
(p_type == TK_TYPE_VEC3) ||
(p_type == TK_TYPE_VEC4) ||
(p_type == TK_TYPE_COLOR) ||
(p_type == TK_TYPE_MAT2) ||
(p_type == TK_TYPE_MAT3) ||
(p_type == TK_TYPE_MAT4) ||
(p_type == TK_TYPE_TEXTURE) ||
(p_type == TK_TYPE_CUBEMAP);
}
bool ShaderLanguage::parser_is_at_function(Parser &parser) {
return (is_token_datatype(parser.get_next_token_type(0)) && parser.get_next_token_type(1) == TK_INDENTIFIER && parser.get_next_token_type(2) == TK_PARENTHESIS_OPEN);
}
bool ShaderLanguage::test_existing_identifier(Node *p_node, const StringName p_identifier, bool p_func, bool p_var, bool p_builtin) {
Node *node = p_node;
while (node) {
if (node->type == Node::TYPE_BLOCK) {
BlockNode *block = (BlockNode *)node;
if (block->variables.has(p_identifier))
return true;
} else if (node->type == Node::TYPE_PROGRAM) {
ProgramNode *program = (ProgramNode *)node;
for (int i = 0; i < program->functions.size(); i++) {
if (program->functions[i].name == p_identifier) {
return true;
}
}
if (program->builtin_variables.has(p_identifier)) {
return true;
}
if (program->uniforms.has(p_identifier)) {
return true;
}
} else if (node->type == Node::TYPE_FUNCTION) {
FunctionNode *func = (FunctionNode *)node;
for (int i = 0; i < func->arguments.size(); i++)
if (func->arguments[i].name == p_identifier)
return true;
}
node = node->parent;
}
// try keywords
int idx = 0;
//todo optimize
while (intrinsic_func_defs[idx].name) {
if (p_identifier.operator String() == intrinsic_func_defs[idx].name)
return true;
idx++;
}
return false;
}
Error ShaderLanguage::parse_function(Parser &parser, BlockNode *p_block) {
if (!p_block->parent || p_block->parent->type != Node::TYPE_PROGRAM) {
parser.set_error("Misplaced function");
return ERR_PARSE_ERROR;
}
ProgramNode *program = (ProgramNode *)p_block->parent;
StringName name = parser.get_next_token(1).text;
if (test_existing_identifier(p_block, name)) {
parser.set_error("Duplicate Identifier (existing variable/builtin/function): " + name);
return ERR_PARSE_ERROR;
}
FunctionNode *function = parser.create_node<FunctionNode>(program);
function->body = parser.create_node<BlockNode>(function);
function->name = name;
function->return_type = get_token_datatype(parser.get_next_token_type(0));
{ //add to programnode
ProgramNode::Function f;
f.name = name;
f.function = function;
program->functions.push_back(f);
}
int ofs = 3;
while (true) {
//end of arguments
if (parser.get_next_token_type(ofs) == TK_PARENTHESIS_CLOSE) {
ofs++;
break;
}
//next argument awaits
if (parser.get_next_token_type(ofs) == TK_COMMA) {
if (!is_token_nonvoid_datatype(parser.get_next_token_type(ofs + 1))) {
parser.set_error("Expected Identifier or ')' following ','");
return ERR_PARSE_ERROR;
}
ofs++;
continue;
}
if (!is_token_nonvoid_datatype(parser.get_next_token_type(ofs + 0))) {
parser.set_error("Invalid Argument Type");
return ERR_PARSE_ERROR;
}
DataType identtype = get_token_datatype(parser.get_next_token_type(ofs + 0));
if (parser.get_next_token_type(ofs + 1) != TK_INDENTIFIER) {
parser.set_error("Expected Argument Identifier");
return ERR_PARSE_ERROR;
}
StringName identname = parser.get_next_token(ofs + 1).text;
if (test_existing_identifier(function, identname)) {
parser.set_error("Duplicate Argument Identifier: " + identname);
return ERR_DUPLICATE_SYMBOL;
}
FunctionNode::Argument arg;
arg.name = identname;
arg.type = identtype;
//function->body->variables[arg.name]=arg.type;
function->arguments.push_back(arg);
ofs += 2;
}
parser.advance(ofs);
// match {
if (parser.get_next_token_type() != TK_CURLY_BRACKET_OPEN) {
parser.set_error("Expected '{'");
return ERR_PARSE_ERROR;
}
parser.advance();
Error err = parse_block(parser, function->body);
if (err)
return err;
// make sure that if the function has a return type, it does return something..
if (function->return_type != TYPE_VOID) {
bool found = false;
for (int i = 0; i < function->body->statements.size(); i++) {
if (function->body->statements[i]->type == Node::TYPE_CONTROL_FLOW) {
ControlFlowNode *cf = (ControlFlowNode *)function->body->statements[i];
if (cf->flow_op == FLOW_OP_RETURN) {
// type of return was already checked when inserted
// no need to check here
found = true;
}
}
}
if (!found) {
parser.set_error("Function must return a value (use the main block)");
return ERR_PARSE_ERROR;
}
}
return OK;
}
const ShaderLanguage::IntrinsicFuncDef ShaderLanguage::intrinsic_func_defs[] = {
//constructors
{ "bool", TYPE_BOOL, { TYPE_BOOL, TYPE_VOID } },
{ "float", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "vec2", TYPE_VEC2, { TYPE_FLOAT, TYPE_VOID } },
{ "vec2", TYPE_VEC2, { TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "vec3", TYPE_VEC3, { TYPE_FLOAT, TYPE_VOID } },
{ "vec3", TYPE_VEC3, { TYPE_FLOAT, TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "vec3", TYPE_VEC3, { TYPE_VEC2, TYPE_FLOAT, TYPE_VOID } },
{ "vec3", TYPE_VEC3, { TYPE_FLOAT, TYPE_VEC2, TYPE_VOID } },
{ "vec4", TYPE_VEC4, { TYPE_FLOAT, TYPE_VOID } },
{ "vec4", TYPE_VEC4, { TYPE_FLOAT, TYPE_FLOAT, TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "vec4", TYPE_VEC4, { TYPE_FLOAT, TYPE_VEC2, TYPE_FLOAT, TYPE_VOID } },
{ "vec4", TYPE_VEC4, { TYPE_VEC2, TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "vec4", TYPE_VEC4, { TYPE_FLOAT, TYPE_FLOAT, TYPE_VEC2, TYPE_VOID } },
{ "vec4", TYPE_VEC4, { TYPE_FLOAT, TYPE_VEC3, TYPE_VOID } },
{ "vec4", TYPE_VEC4, { TYPE_VEC3, TYPE_FLOAT, TYPE_VOID } },
{ "vec4", TYPE_VEC4, { TYPE_VEC2, TYPE_VEC2, TYPE_VOID } },
{ "mat2", TYPE_MAT2, { TYPE_VEC2, TYPE_VEC2, TYPE_VOID } },
{ "mat3", TYPE_MAT3, { TYPE_VEC3, TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "mat4", TYPE_MAT4, { TYPE_VEC4, TYPE_VEC4, TYPE_VEC4, TYPE_VEC4, TYPE_VOID } },
//intrinsics - trigonometry
{ "sin", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "cos", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "tan", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "asin", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "acos", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "atan", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "atan2", TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "sinh", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "cosh", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "tanh", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
//intrinsics - exponential
{ "pow", TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "pow", TYPE_VEC2, { TYPE_VEC2, TYPE_FLOAT, TYPE_VOID } },
{ "pow", TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2, TYPE_VOID } },
{ "pow", TYPE_VEC3, { TYPE_VEC3, TYPE_FLOAT, TYPE_VOID } },
{ "pow", TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "pow", TYPE_VEC4, { TYPE_VEC4, TYPE_FLOAT, TYPE_VOID } },
{ "pow", TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4, TYPE_VOID } },
{ "exp", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "exp", TYPE_VEC2, { TYPE_VEC2, TYPE_VOID } },
{ "exp", TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ "exp", TYPE_VEC4, { TYPE_VEC4, TYPE_VOID } },
{ "log", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "log", TYPE_VEC2, { TYPE_VEC2, TYPE_VOID } },
{ "log", TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ "log", TYPE_VEC4, { TYPE_VEC4, TYPE_VOID } },
{ "sqrt", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "sqrt", TYPE_VEC2, { TYPE_VEC2, TYPE_VOID } },
{ "sqrt", TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ "sqrt", TYPE_VEC4, { TYPE_VEC4, TYPE_VOID } },
//intrinsics - common
{ "abs", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "abs", TYPE_VEC2, { TYPE_VEC2, TYPE_VOID } },
{ "abs", TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ "abs", TYPE_VEC4, { TYPE_VEC4, TYPE_VOID } },
{ "sign", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "sign", TYPE_VEC2, { TYPE_VEC2, TYPE_VOID } },
{ "sign", TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ "sign", TYPE_VEC4, { TYPE_VEC4, TYPE_VOID } },
{ "floor", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "floor", TYPE_VEC2, { TYPE_VEC2, TYPE_VOID } },
{ "floor", TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ "floor", TYPE_VEC4, { TYPE_VEC4, TYPE_VOID } },
{ "trunc", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "trunc", TYPE_VEC2, { TYPE_VEC2, TYPE_VOID } },
{ "trunc", TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ "trunc", TYPE_VEC4, { TYPE_VEC4, TYPE_VOID } },
{ "round", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "round", TYPE_VEC2, { TYPE_VEC2, TYPE_VOID } },
{ "round", TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ "round", TYPE_VEC4, { TYPE_VEC4, TYPE_VOID } },
{ "ceil", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "ceil", TYPE_VEC2, { TYPE_VEC2, TYPE_VOID } },
{ "ceil", TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ "ceil", TYPE_VEC4, { TYPE_VEC4, TYPE_VOID } },
{ "fract", TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ "fract", TYPE_VEC2, { TYPE_VEC2, TYPE_VOID } },
{ "fract", TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ "fract", TYPE_VEC4, { TYPE_VEC4, TYPE_VOID } },
{ "mod", TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "mod", TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2, TYPE_VOID } },
{ "mod", TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "mod", TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4, TYPE_VOID } },
{ "min", TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "min", TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2, TYPE_VOID } },
{ "min", TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "min", TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4, TYPE_VOID } },
{ "max", TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "max", TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2, TYPE_VOID } },
{ "max", TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "max", TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4, TYPE_VOID } },
{ "clamp", TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "clamp", TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2, TYPE_VEC2, TYPE_VOID } },
{ "clamp", TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "clamp", TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4, TYPE_VEC4, TYPE_VOID } },
{ "clamp", TYPE_VEC2, { TYPE_VEC2, TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "clamp", TYPE_VEC3, { TYPE_VEC3, TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "clamp", TYPE_VEC4, { TYPE_VEC4, TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "mix", TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "mix", TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2, TYPE_FLOAT, TYPE_VOID } },
{ "mix", TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2, TYPE_VEC2, TYPE_VOID } },
{ "mix", TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3, TYPE_FLOAT, TYPE_VOID } },
{ "mix", TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "mix", TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4, TYPE_FLOAT, TYPE_VOID } },
{ "mix", TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4, TYPE_VEC4, TYPE_VOID } },
{ "step", TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "step", TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2, TYPE_VOID } },
{ "step", TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "step", TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4, TYPE_VOID } },
{ "step", TYPE_VEC2, { TYPE_FLOAT, TYPE_VEC2, TYPE_VOID } },
{ "step", TYPE_VEC3, { TYPE_FLOAT, TYPE_VEC3, TYPE_VOID } },
{ "step", TYPE_VEC4, { TYPE_FLOAT, TYPE_VEC4, TYPE_VOID } },
{ "smoothstep", TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT, TYPE_FLOAT, TYPE_VOID } },
{ "smoothstep", TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2, TYPE_VEC2, TYPE_VOID } },
{ "smoothstep", TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "smoothstep", TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4, TYPE_VEC4, TYPE_VOID } },
{ "smoothstep", TYPE_VEC2, { TYPE_FLOAT, TYPE_FLOAT, TYPE_VEC2, TYPE_VOID } },
{ "smoothstep", TYPE_VEC3, { TYPE_FLOAT, TYPE_FLOAT, TYPE_VEC3, TYPE_VOID } },
{ "smoothstep", TYPE_VEC4, { TYPE_FLOAT, TYPE_FLOAT, TYPE_VEC4, TYPE_VOID } },
//intrinsics - geometric
{ "length", TYPE_FLOAT, { TYPE_VEC2, TYPE_VOID } },
{ "length", TYPE_FLOAT, { TYPE_VEC3, TYPE_VOID } },
{ "length", TYPE_FLOAT, { TYPE_VEC4, TYPE_VOID } },
{ "distance", TYPE_FLOAT, { TYPE_VEC2, TYPE_VEC2, TYPE_VOID } },
{ "distance", TYPE_FLOAT, { TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "distance", TYPE_FLOAT, { TYPE_VEC4, TYPE_VEC4, TYPE_VOID } },
{ "dot", TYPE_FLOAT, { TYPE_VEC2, TYPE_VEC2, TYPE_VOID } },
{ "dot", TYPE_FLOAT, { TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "dot", TYPE_FLOAT, { TYPE_VEC4, TYPE_VEC4, TYPE_VOID } },
{ "cross", TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "normalize", TYPE_VEC2, { TYPE_VEC2, TYPE_VOID } },
{ "normalize", TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ "normalize", TYPE_VEC4, { TYPE_VEC4, TYPE_VOID } },
{ "reflect", TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3, TYPE_VOID } },
{ "refract", TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3, TYPE_FLOAT, TYPE_VOID } },
//intrinsics - texture
{ "tex", TYPE_VEC4, { TYPE_TEXTURE, TYPE_VEC2, TYPE_VOID } },
{ "texcube", TYPE_VEC4, { TYPE_CUBEMAP, TYPE_VEC3, TYPE_VOID } },
{ "texscreen", TYPE_VEC3, { TYPE_VEC2, TYPE_VOID } },
{ "texpos", TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ NULL, TYPE_VOID, { TYPE_VOID } }
};
const ShaderLanguage::OperatorDef ShaderLanguage::operator_defs[] = {
{ OP_ASSIGN, TYPE_VOID, { TYPE_BOOL, TYPE_BOOL } },
{ OP_ASSIGN, TYPE_VOID, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_ASSIGN, TYPE_VOID, { TYPE_VEC2, TYPE_VEC2 } },
{ OP_ASSIGN, TYPE_VOID, { TYPE_VEC3, TYPE_VEC3 } },
{ OP_ASSIGN, TYPE_VOID, { TYPE_VEC4, TYPE_VEC4 } },
{ OP_ASSIGN, TYPE_VOID, { TYPE_MAT2, TYPE_MAT2 } },
{ OP_ASSIGN, TYPE_VOID, { TYPE_MAT3, TYPE_MAT3 } },
{ OP_ASSIGN, TYPE_VOID, { TYPE_MAT4, TYPE_MAT4 } },
{ OP_ADD, TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_ADD, TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2 } },
{ OP_ADD, TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3 } },
{ OP_ADD, TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4 } },
{ OP_SUB, TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_SUB, TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2 } },
{ OP_SUB, TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3 } },
{ OP_SUB, TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4 } },
{ OP_MUL, TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_MUL, TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2 } },
{ OP_MUL, TYPE_VEC2, { TYPE_VEC2, TYPE_FLOAT } },
{ OP_MUL, TYPE_VEC2, { TYPE_FLOAT, TYPE_VEC2 } },
{ OP_MUL, TYPE_VEC2, { TYPE_VEC2, TYPE_MAT3 } },
{ OP_MUL, TYPE_VEC2, { TYPE_MAT2, TYPE_VEC2 } },
{ OP_MUL, TYPE_VEC2, { TYPE_VEC2, TYPE_MAT2 } },
{ OP_MUL, TYPE_VEC2, { TYPE_MAT3, TYPE_VEC2 } },
{ OP_MUL, TYPE_VEC2, { TYPE_VEC2, TYPE_MAT4 } },
{ OP_MUL, TYPE_VEC2, { TYPE_MAT4, TYPE_VEC2 } },
{ OP_MUL, TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3 } },
{ OP_MUL, TYPE_VEC3, { TYPE_VEC3, TYPE_FLOAT } },
{ OP_MUL, TYPE_VEC3, { TYPE_FLOAT, TYPE_VEC3 } },
{ OP_MUL, TYPE_VEC3, { TYPE_MAT3, TYPE_VEC3 } },
{ OP_MUL, TYPE_VEC3, { TYPE_MAT4, TYPE_VEC3 } },
{ OP_MUL, TYPE_VEC3, { TYPE_VEC3, TYPE_MAT3 } },
{ OP_MUL, TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4 } },
{ OP_MUL, TYPE_VEC4, { TYPE_VEC4, TYPE_FLOAT } },
{ OP_MUL, TYPE_VEC4, { TYPE_FLOAT, TYPE_VEC4 } },
{ OP_MUL, TYPE_VEC4, { TYPE_MAT4, TYPE_VEC4 } },
{ OP_MUL, TYPE_VEC4, { TYPE_VEC4, TYPE_MAT4 } },
{ OP_MUL, TYPE_MAT2, { TYPE_MAT2, TYPE_MAT2 } },
{ OP_MUL, TYPE_MAT3, { TYPE_MAT3, TYPE_MAT3 } },
{ OP_MUL, TYPE_MAT4, { TYPE_MAT4, TYPE_MAT4 } },
{ OP_DIV, TYPE_FLOAT, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_DIV, TYPE_VEC2, { TYPE_VEC2, TYPE_VEC2 } },
{ OP_DIV, TYPE_VEC2, { TYPE_VEC2, TYPE_FLOAT } },
{ OP_DIV, TYPE_VEC2, { TYPE_FLOAT, TYPE_VEC2 } },
{ OP_DIV, TYPE_VEC3, { TYPE_VEC3, TYPE_VEC3 } },
{ OP_DIV, TYPE_VEC3, { TYPE_VEC3, TYPE_FLOAT } },
{ OP_DIV, TYPE_VEC3, { TYPE_FLOAT, TYPE_VEC3 } },
{ OP_DIV, TYPE_VEC4, { TYPE_VEC4, TYPE_VEC4 } },
{ OP_DIV, TYPE_VEC4, { TYPE_VEC4, TYPE_FLOAT } },
{ OP_DIV, TYPE_VEC4, { TYPE_FLOAT, TYPE_VEC4 } },
{ OP_ASSIGN_ADD, TYPE_VOID, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_ASSIGN_ADD, TYPE_VOID, { TYPE_VEC2, TYPE_VEC2 } },
{ OP_ASSIGN_ADD, TYPE_VOID, { TYPE_VEC3, TYPE_VEC3 } },
{ OP_ASSIGN_ADD, TYPE_VOID, { TYPE_VEC4, TYPE_VEC4 } },
{ OP_ASSIGN_ADD, TYPE_VOID, { TYPE_VEC2, TYPE_FLOAT } },
{ OP_ASSIGN_ADD, TYPE_VOID, { TYPE_VEC3, TYPE_FLOAT } },
{ OP_ASSIGN_ADD, TYPE_VOID, { TYPE_VEC4, TYPE_FLOAT } },
{ OP_ASSIGN_SUB, TYPE_VOID, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_ASSIGN_SUB, TYPE_VOID, { TYPE_VEC2, TYPE_VEC2 } },
{ OP_ASSIGN_SUB, TYPE_VOID, { TYPE_VEC3, TYPE_VEC3 } },
{ OP_ASSIGN_SUB, TYPE_VOID, { TYPE_VEC4, TYPE_VEC4 } },
{ OP_ASSIGN_SUB, TYPE_VOID, { TYPE_VEC2, TYPE_FLOAT } },
{ OP_ASSIGN_SUB, TYPE_VOID, { TYPE_VEC3, TYPE_FLOAT } },
{ OP_ASSIGN_SUB, TYPE_VOID, { TYPE_VEC4, TYPE_FLOAT } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_VEC2, TYPE_VEC2 } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_VEC2, TYPE_FLOAT } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_VEC2, TYPE_MAT2 } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_MAT2, TYPE_MAT2 } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_VEC3, TYPE_MAT3 } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_VEC3, TYPE_VEC3 } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_VEC3, TYPE_FLOAT } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_VEC3, TYPE_MAT4 } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_VEC4, TYPE_VEC4 } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_VEC4, TYPE_FLOAT } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_VEC4, TYPE_MAT4 } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_MAT3, TYPE_MAT3 } },
{ OP_ASSIGN_MUL, TYPE_VOID, { TYPE_MAT4, TYPE_MAT4 } },
{ OP_ASSIGN_DIV, TYPE_VOID, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_ASSIGN_DIV, TYPE_VOID, { TYPE_VEC2, TYPE_VEC2 } },
{ OP_ASSIGN_DIV, TYPE_VOID, { TYPE_VEC2, TYPE_FLOAT } },
{ OP_ASSIGN_DIV, TYPE_VOID, { TYPE_VEC3, TYPE_VEC3 } },
{ OP_ASSIGN_DIV, TYPE_VOID, { TYPE_VEC3, TYPE_FLOAT } },
{ OP_ASSIGN_DIV, TYPE_VOID, { TYPE_VEC4, TYPE_VEC4 } },
{ OP_ASSIGN_DIV, TYPE_VOID, { TYPE_VEC4, TYPE_FLOAT } },
{ OP_NEG, TYPE_FLOAT, { TYPE_FLOAT, TYPE_VOID } },
{ OP_NEG, TYPE_VEC2, { TYPE_VEC2, TYPE_VOID } },
{ OP_NEG, TYPE_VEC3, { TYPE_VEC3, TYPE_VOID } },
{ OP_NEG, TYPE_VEC4, { TYPE_VEC4, TYPE_VOID } },
{ OP_NOT, TYPE_BOOL, { TYPE_BOOL, TYPE_VOID } },
{ OP_CMP_EQ, TYPE_BOOL, { TYPE_BOOL, TYPE_BOOL } },
{ OP_CMP_EQ, TYPE_BOOL, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_CMP_EQ, TYPE_BOOL, { TYPE_VEC3, TYPE_VEC2 } },
{ OP_CMP_EQ, TYPE_BOOL, { TYPE_VEC3, TYPE_VEC3 } },
{ OP_CMP_EQ, TYPE_BOOL, { TYPE_VEC3, TYPE_VEC4 } },
//{OP_CMP_EQ,TYPE_MAT3,{TYPE_MAT4,TYPE_MAT3}}, ??
//{OP_CMP_EQ,TYPE_MAT4,{TYPE_MAT4,TYPE_MAT4}}, ??
{ OP_CMP_NEQ, TYPE_BOOL, { TYPE_BOOL, TYPE_BOOL } },
{ OP_CMP_NEQ, TYPE_BOOL, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_CMP_NEQ, TYPE_BOOL, { TYPE_VEC2, TYPE_VEC2 } },
{ OP_CMP_NEQ, TYPE_BOOL, { TYPE_VEC3, TYPE_VEC3 } },
{ OP_CMP_NEQ, TYPE_BOOL, { TYPE_VEC4, TYPE_VEC4 } },
//{OP_CMP_NEQ,TYPE_MAT4,{TYPE_MAT4,TYPE_MAT4}}, //?
{ OP_CMP_LEQ, TYPE_BOOL, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_CMP_GEQ, TYPE_BOOL, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_CMP_LESS, TYPE_BOOL, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_CMP_GREATER, TYPE_BOOL, { TYPE_FLOAT, TYPE_FLOAT } },
{ OP_CMP_OR, TYPE_BOOL, { TYPE_BOOL, TYPE_BOOL } },
{ OP_CMP_AND, TYPE_BOOL, { TYPE_BOOL, TYPE_BOOL } },
{ OP_MAX, TYPE_VOID, { TYPE_VOID, TYPE_VOID } }
};
const ShaderLanguage::BuiltinsDef ShaderLanguage::vertex_builtins_defs[] = {
{ "SRC_VERTEX", TYPE_VEC3 },
{ "SRC_NORMAL", TYPE_VEC3 },
{ "SRC_TANGENT", TYPE_VEC3 },
{ "SRC_BINORMALF", TYPE_FLOAT },
{ "POSITION", TYPE_VEC4 },
{ "VERTEX", TYPE_VEC3 },
{ "NORMAL", TYPE_VEC3 },
{ "TANGENT", TYPE_VEC3 },
{ "BINORMAL", TYPE_VEC3 },
{ "UV", TYPE_VEC2 },
{ "UV2", TYPE_VEC2 },
{ "COLOR", TYPE_VEC4 },
{ "BONES", TYPE_VEC4 },
{ "WEIGHTS", TYPE_VEC4 },
{ "VAR1", TYPE_VEC4 },
{ "VAR2", TYPE_VEC4 },
{ "SPEC_EXP", TYPE_FLOAT },
{ "POINT_SIZE", TYPE_FLOAT },
//builtins
{ "WORLD_MATRIX", TYPE_MAT4 },
{ "INV_CAMERA_MATRIX", TYPE_MAT4 },
{ "PROJECTION_MATRIX", TYPE_MAT4 },
{ "MODELVIEW_MATRIX", TYPE_MAT4 },
{ "INSTANCE_ID", TYPE_FLOAT },
{ "TIME", TYPE_FLOAT },
{ NULL, TYPE_VOID },
};
const ShaderLanguage::BuiltinsDef ShaderLanguage::fragment_builtins_defs[] = {
{ "VERTEX", TYPE_VEC3 },
{ "POSITION", TYPE_VEC4 },
{ "NORMAL", TYPE_VEC3 },
{ "TANGENT", TYPE_VEC3 },
{ "BINORMAL", TYPE_VEC3 },
{ "NORMALMAP", TYPE_VEC3 },
{ "NORMALMAP_DEPTH", TYPE_FLOAT },
{ "UV", TYPE_VEC2 },
{ "UV2", TYPE_VEC2 },
{ "COLOR", TYPE_VEC4 },
{ "NORMAL", TYPE_VEC3 },
{ "VAR1", TYPE_VEC4 },
{ "VAR2", TYPE_VEC4 },
{ "DIFFUSE", TYPE_VEC3 },
{ "DIFFUSE_ALPHA", TYPE_VEC4 },
{ "SPECULAR", TYPE_VEC3 },
{ "EMISSION", TYPE_VEC3 },
{ "SPEC_EXP", TYPE_FLOAT },
{ "GLOW", TYPE_FLOAT },
{ "SHADE_PARAM", TYPE_FLOAT },
{ "DISCARD", TYPE_BOOL },
{ "SCREEN_UV", TYPE_VEC2 },
{ "POINT_COORD", TYPE_VEC2 },
{ "INV_CAMERA_MATRIX", TYPE_MAT4 },
// { "SCREEN_POS", TYPE_VEC2},
// { "SCREEN_TEXEL_SIZE", TYPE_VEC2},
{ "TIME", TYPE_FLOAT },
{ NULL, TYPE_VOID }
};
const ShaderLanguage::BuiltinsDef ShaderLanguage::light_builtins_defs[] = {
{ "NORMAL", TYPE_VEC3 },
{ "LIGHT_DIR", TYPE_VEC3 },
{ "LIGHT_DIFFUSE", TYPE_VEC3 },
{ "LIGHT_SPECULAR", TYPE_VEC3 },
{ "EYE_VEC", TYPE_VEC3 },
{ "DIFFUSE", TYPE_VEC3 },
{ "SPECULAR", TYPE_VEC3 },
{ "SPECULAR_EXP", TYPE_FLOAT },
{ "SHADE_PARAM", TYPE_FLOAT },
{ "LIGHT", TYPE_VEC3 },
{ "SHADOW", TYPE_VEC3 },
{ "POINT_COORD", TYPE_VEC2 },
// { "SCREEN_POS", TYPE_VEC2},
// { "SCREEN_TEXEL_SIZE", TYPE_VEC2},
{ "TIME", TYPE_FLOAT },
{ NULL, TYPE_VOID }
};
const ShaderLanguage::BuiltinsDef ShaderLanguage::ci_vertex_builtins_defs[] = {
{ "SRC_VERTEX", TYPE_VEC2 },
{ "VERTEX", TYPE_VEC2 },
{ "WORLD_VERTEX", TYPE_VEC2 },
{ "UV", TYPE_VEC2 },
{ "COLOR", TYPE_VEC4 },
{ "VAR1", TYPE_VEC4 },
{ "VAR2", TYPE_VEC4 },
{ "POINT_SIZE", TYPE_FLOAT },
//builtins
{ "WORLD_MATRIX", TYPE_MAT4 },
{ "PROJECTION_MATRIX", TYPE_MAT4 },
{ "EXTRA_MATRIX", TYPE_MAT4 },
{ "TIME", TYPE_FLOAT },
{ "AT_LIGHT_PASS", TYPE_BOOL },
{ NULL, TYPE_VOID },
};
const ShaderLanguage::BuiltinsDef ShaderLanguage::ci_fragment_builtins_defs[] = {
{ "SRC_COLOR", TYPE_VEC4 },
{ "POSITION", TYPE_VEC2 },
{ "NORMAL", TYPE_VEC3 },
{ "NORMALMAP", TYPE_VEC3 },
{ "NORMALMAP_DEPTH", TYPE_FLOAT },
{ "UV", TYPE_VEC2 },
{ "COLOR", TYPE_VEC4 },
{ "TEXTURE", TYPE_TEXTURE },
{ "TEXTURE_PIXEL_SIZE", TYPE_VEC2 },
{ "VAR1", TYPE_VEC4 },
{ "VAR2", TYPE_VEC4 },
{ "SCREEN_UV", TYPE_VEC2 },
{ "POINT_COORD", TYPE_VEC2 },
// { "SCREEN_POS", TYPE_VEC2},
// { "SCREEN_TEXEL_SIZE", TYPE_VEC2},
{ "TIME", TYPE_FLOAT },
{ "AT_LIGHT_PASS", TYPE_BOOL },
{ NULL, TYPE_VOID }
};
const ShaderLanguage::BuiltinsDef ShaderLanguage::ci_light_builtins_defs[] = {
{ "POSITION", TYPE_VEC2 },
{ "NORMAL", TYPE_VEC3 },
{ "UV", TYPE_VEC2 },
{ "COLOR", TYPE_VEC4 },
{ "TEXTURE", TYPE_TEXTURE },
{ "TEXTURE_PIXEL_SIZE", TYPE_VEC2 },
{ "VAR1", TYPE_VEC4 },
{ "VAR2", TYPE_VEC4 },
{ "SCREEN_UV", TYPE_VEC2 },
{ "LIGHT_VEC", TYPE_VEC2 },
{ "LIGHT_HEIGHT", TYPE_FLOAT },
{ "LIGHT_COLOR", TYPE_VEC4 },
{ "LIGHT_UV", TYPE_VEC2 },
{ "LIGHT_SHADOW", TYPE_VEC4 },
{ "LIGHT", TYPE_VEC4 },
{ "SHADOW", TYPE_VEC4 },
{ "POINT_COORD", TYPE_VEC2 },
// { "SCREEN_POS", TYPE_VEC2},
// { "SCREEN_TEXEL_SIZE", TYPE_VEC2},
{ "TIME", TYPE_FLOAT },
{ NULL, TYPE_VOID }
};
const ShaderLanguage::BuiltinsDef ShaderLanguage::postprocess_fragment_builtins_defs[] = {
{ "IN_COLOR", TYPE_VEC3 },
{ "IN_POSITION", TYPE_VEC3 },
{ "OUT_COLOR", TYPE_VEC3 },
{ "SCREEN_POS", TYPE_VEC2 },
{ "SCREEN_TEXEL_SIZE", TYPE_VEC2 },
{ "TIME", TYPE_FLOAT },
{ NULL, TYPE_VOID }
};
ShaderLanguage::DataType ShaderLanguage::compute_node_type(Node *p_node) {
switch (p_node->type) {
case Node::TYPE_PROGRAM: ERR_FAIL_V(TYPE_VOID);
case Node::TYPE_FUNCTION: return static_cast<FunctionNode *>(p_node)->return_type;
case Node::TYPE_BLOCK: ERR_FAIL_V(TYPE_VOID);
case Node::TYPE_VARIABLE: return static_cast<VariableNode *>(p_node)->datatype_cache;
case Node::TYPE_CONSTANT: return static_cast<ConstantNode *>(p_node)->datatype;
case Node::TYPE_OPERATOR: return static_cast<OperatorNode *>(p_node)->return_cache;
case Node::TYPE_CONTROL_FLOW: ERR_FAIL_V(TYPE_VOID);
case Node::TYPE_MEMBER: return static_cast<MemberNode *>(p_node)->datatype;
}
return TYPE_VOID;
}
ShaderLanguage::Node *ShaderLanguage::validate_function_call(Parser &parser, OperatorNode *p_func) {
ERR_FAIL_COND_V(p_func->op != OP_CALL && p_func->op != OP_CONSTRUCT, NULL);
Vector<DataType> args;
ERR_FAIL_COND_V(p_func->arguments[0]->type != Node::TYPE_VARIABLE, NULL);
String name = static_cast<VariableNode *>(p_func->arguments[0])->name.operator String();
bool all_const = true;
for (int i = 1; i < p_func->arguments.size(); i++) {
if (p_func->arguments[i]->type != Node::TYPE_CONSTANT)
all_const = false;
args.push_back(compute_node_type(p_func->arguments[i]));
}
int argcount = args.size();
bool found_intrinsic = false;
if (argcount <= 4) {
// test intrinsics
int idx = 0;
while (intrinsic_func_defs[idx].name) {
if (name == intrinsic_func_defs[idx].name) {
bool fail = false;
for (int i = 0; i < argcount; i++) {
if (args[i] != intrinsic_func_defs[idx].args[i]) {
fail = true;
break;
}
}
if (!fail && argcount < 4 && intrinsic_func_defs[idx].args[argcount] != TYPE_VOID)
fail = true; //make sure the number of arguments matches
if (!fail) {
p_func->return_cache = intrinsic_func_defs[idx].rettype;
found_intrinsic = true;
break;
}
}
idx++;
}
}
if (found_intrinsic) {
if (p_func->op == OP_CONSTRUCT && all_const) {
Vector<float> cdata;
for (int i = 0; i < argcount; i++) {
Variant v = static_cast<ConstantNode *>(p_func->arguments[i + 1])->value;
switch (v.get_type()) {
case Variant::REAL: cdata.push_back(v); break;
case Variant::VECTOR2: {
Vector2 v2 = v;
cdata.push_back(v2.x);
cdata.push_back(v2.y);
} break;
case Variant::VECTOR3: {
Vector3 v3 = v;
cdata.push_back(v3.x);
cdata.push_back(v3.y);
cdata.push_back(v3.z);
} break;
case Variant::PLANE: {
Plane v4 = v;
cdata.push_back(v4.normal.x);
cdata.push_back(v4.normal.y);
cdata.push_back(v4.normal.z);
cdata.push_back(v4.d);
} break;
default: ERR_FAIL_V(NULL);
}
}
ConstantNode *cn = parser.create_node<ConstantNode>(p_func->parent);
Variant data;
switch (p_func->return_cache) {
case TYPE_FLOAT: data = cdata[0]; break;
case TYPE_VEC2:
if (cdata.size() == 1)
data = Vector2(cdata[0], cdata[0]);
else
data = Vector2(cdata[0], cdata[1]);
break;
case TYPE_VEC3:
if (cdata.size() == 1)
data = Vector3(cdata[0], cdata[0], cdata[0]);
else
data = Vector3(cdata[0], cdata[1], cdata[2]);
break;
case TYPE_VEC4:
if (cdata.size() == 1)
data = Plane(cdata[0], cdata[0], cdata[0], cdata[0]);
else
data = Plane(cdata[0], cdata[1], cdata[2], cdata[3]);
break;
}
cn->datatype = p_func->return_cache;
cn->value = data;
return cn;
}
return p_func;
}
// try existing functions..
FunctionNode *exclude_function = NULL; //exclude current function (in case inside one)
Node *node = p_func;
while (node->parent) {
if (node->type == Node::TYPE_FUNCTION) {
exclude_function = (FunctionNode *)node;
}
node = node->parent;
}
ERR_FAIL_COND_V(node->type != Node::TYPE_PROGRAM, NULL);
ProgramNode *program = (ProgramNode *)node;
for (int i = 0; i < program->functions.size(); i++) {
if (program->functions[i].function == exclude_function)
continue;
FunctionNode *pfunc = program->functions[i].function;
if (pfunc->arguments.size() != args.size())
continue;
bool fail = false;
for (int i = 0; i < args.size(); i++) {
if (args[i] != pfunc->arguments[i].type) {
fail = true;
break;
}
}
if (!fail && name == program->functions[i].name) {
p_func->return_cache = pfunc->return_type;
return p_func;
}
}
return NULL;
}
ShaderLanguage::Node *ShaderLanguage::validate_operator(Parser &parser, OperatorNode *p_func) {
int argcount = p_func->arguments.size();
ERR_FAIL_COND_V(argcount > 2, NULL);
DataType argtype[2] = { TYPE_VOID, TYPE_VOID };
bool all_const = true;
for (int i = 0; i < argcount; i++) {
argtype[i] = compute_node_type(p_func->arguments[i]);
if (p_func->arguments[i]->type != Node::TYPE_CONSTANT)
all_const = false;
}
int idx = 0;
bool valid = false;
while (operator_defs[idx].op != OP_MAX) {
if (p_func->op == operator_defs[idx].op) {
if (operator_defs[idx].args[0] == argtype[0] && operator_defs[idx].args[1] == argtype[1]) {
p_func->return_cache = operator_defs[idx].rettype;
valid = true;
break;
}
}
idx++;
}
if (!valid)
return NULL;
#define _RCO2(m_op, m_vop) \
case m_op: { \
ConstantNode *cn = parser.create_node<ConstantNode>(p_func->parent); \
cn->datatype = p_func->return_cache; \
Variant::evaluate(m_vop, static_cast<ConstantNode *>(p_func->arguments[0])->value, static_cast<ConstantNode *>(p_func->arguments[1])->value, cn->value, valid); \
if (!valid) \
return NULL; \
return cn; \
} break;
#define _RCO1(m_op, m_vop) \
case m_op: { \
ConstantNode *cn = parser.create_node<ConstantNode>(p_func->parent); \
cn->datatype = p_func->return_cache; \
Variant::evaluate(m_vop, static_cast<ConstantNode *>(p_func->arguments[0])->value, Variant(), cn->value, valid); \
if (!valid) \
return NULL; \
return cn; \
} break;
if (all_const) {
//reduce constant operator
switch (p_func->op) {
_RCO2(OP_ADD, Variant::OP_ADD);
_RCO2(OP_SUB, Variant::OP_SUBSTRACT);
_RCO2(OP_MUL, Variant::OP_MULTIPLY);
_RCO2(OP_DIV, Variant::OP_DIVIDE);
_RCO1(OP_NEG, Variant::OP_NEGATE);
_RCO1(OP_NOT, Variant::OP_NOT);
_RCO2(OP_CMP_EQ, Variant::OP_EQUAL);
_RCO2(OP_CMP_NEQ, Variant::OP_NOT_EQUAL);
_RCO2(OP_CMP_LEQ, Variant::OP_LESS_EQUAL);
_RCO2(OP_CMP_GEQ, Variant::OP_GREATER_EQUAL);
_RCO2(OP_CMP_LESS, Variant::OP_LESS);
_RCO2(OP_CMP_GREATER, Variant::OP_GREATER);
_RCO2(OP_CMP_OR, Variant::OP_OR);
_RCO2(OP_CMP_AND, Variant::OP_AND);
default: {}
}
}
return p_func;
}
bool ShaderLanguage::is_token_operator(TokenType p_type) {
return (p_type == TK_OP_EQUAL) ||
(p_type == TK_OP_NOT_EQUAL) ||
(p_type == TK_OP_LESS) ||
(p_type == TK_OP_LESS_EQUAL) ||
(p_type == TK_OP_GREATER) ||
(p_type == TK_OP_GREATER_EQUAL) ||
(p_type == TK_OP_AND) ||
(p_type == TK_OP_OR) ||
(p_type == TK_OP_NOT) ||
(p_type == TK_OP_ADD) ||
(p_type == TK_OP_SUB) ||
(p_type == TK_OP_MUL) ||
(p_type == TK_OP_DIV) ||
(p_type == TK_OP_NEG) ||
(p_type == TK_OP_ASSIGN) ||
(p_type == TK_OP_ASSIGN_ADD) ||
(p_type == TK_OP_ASSIGN_SUB) ||
(p_type == TK_OP_ASSIGN_MUL) ||
(p_type == TK_OP_ASSIGN_DIV);
}
ShaderLanguage::Operator ShaderLanguage::get_token_operator(TokenType p_type) {
switch (p_type) {
case TK_OP_EQUAL: return OP_CMP_EQ;
case TK_OP_NOT_EQUAL: return OP_CMP_NEQ;
case TK_OP_LESS: return OP_CMP_LESS;
case TK_OP_LESS_EQUAL: return OP_CMP_LEQ;
case TK_OP_GREATER: return OP_CMP_GREATER;
case TK_OP_GREATER_EQUAL: return OP_CMP_GEQ;
case TK_OP_AND: return OP_CMP_AND;
case TK_OP_OR: return OP_CMP_OR;
case TK_OP_NOT: return OP_NOT;
case TK_OP_ADD: return OP_ADD;
case TK_OP_SUB: return OP_SUB;
case TK_OP_MUL: return OP_MUL;
case TK_OP_DIV: return OP_DIV;
case TK_OP_NEG: return OP_NEG;
case TK_OP_ASSIGN: return OP_ASSIGN;
case TK_OP_ASSIGN_ADD: return OP_ASSIGN_ADD;
case TK_OP_ASSIGN_SUB: return OP_ASSIGN_SUB;
case TK_OP_ASSIGN_MUL: return OP_ASSIGN_MUL;
case TK_OP_ASSIGN_DIV: return OP_ASSIGN_DIV;
default: ERR_FAIL_V(OP_MAX);
}
return OP_MAX;
}
Error ShaderLanguage::parse_expression(Parser &parser, Node *p_parent, Node **r_expr) {
Vector<Expression> expression;
//Vector<TokenType> operators;
while (true) {
Node *expr = NULL;
if (parser.get_next_token_type() == TK_PARENTHESIS_OPEN) {
//handle subexpression
parser.advance();
Error err = parse_expression(parser, p_parent, &expr);
if (err)
return err;
if (parser.get_next_token_type() != TK_PARENTHESIS_CLOSE) {
parser.set_error("Expected ')' in expression");
return ERR_PARSE_ERROR;
}
parser.advance();
} else if (parser.get_next_token_type() == TK_REAL_CONSTANT) {
ConstantNode *constant = parser.create_node<ConstantNode>(p_parent);
constant->value = parser.get_next_token().text.operator String().to_double();
constant->datatype = TYPE_FLOAT;
expr = constant;
parser.advance();
} else if (parser.get_next_token_type() == TK_TRUE) {
//print_line("found true");
//handle true constant
ConstantNode *constant = parser.create_node<ConstantNode>(p_parent);
constant->value = true;
constant->datatype = TYPE_BOOL;
expr = constant;
parser.advance();
} else if (parser.get_next_token_type() == TK_FALSE) {
//handle false constant
ConstantNode *constant = parser.create_node<ConstantNode>(p_parent);
constant->value = false;
constant->datatype = TYPE_BOOL;
expr = constant;
parser.advance();
} else if (parser.get_next_token_type() == TK_TYPE_VOID) {
//make sure void is not used in expression
parser.set_error("Void value not allowed in Expression");
return ERR_PARSE_ERROR;
} else if (parser.get_next_token_type(1) == TK_PARENTHESIS_OPEN && (is_token_nonvoid_datatype(parser.get_next_token_type()) || parser.get_next_token_type() == TK_INDENTIFIER)) {
//function or constructor
StringName name;
DataType constructor = TYPE_VOID;
if (is_token_nonvoid_datatype(parser.get_next_token_type())) {
constructor = get_token_datatype(parser.get_next_token_type());
switch (get_token_datatype(parser.get_next_token_type())) {
case TYPE_BOOL: name = "bool"; break;
case TYPE_FLOAT: name = "float"; break;
case TYPE_VEC2: name = "vec2"; break;
case TYPE_VEC3: name = "vec3"; break;
case TYPE_VEC4: name = "vec4"; break;
case TYPE_MAT2: name = "mat2"; break;
case TYPE_MAT3: name = "mat3"; break;
case TYPE_MAT4: name = "mat4"; break;
default: ERR_FAIL_V(ERR_BUG);
}
} else {
name = parser.get_next_token().text;
}
if (!test_existing_identifier(p_parent, name)) {
parser.set_error("Unknown identifier in expression: " + name);
return ERR_PARSE_ERROR;
}
parser.advance(2);
OperatorNode *func = parser.create_node<OperatorNode>(p_parent);
func->op = constructor != TYPE_VOID ? OP_CONSTRUCT : OP_CALL;
VariableNode *funcname = parser.create_node<VariableNode>(func);
funcname->name = name;
func->arguments.push_back(funcname);
//parse parameters
if (parser.get_next_token_type() == TK_PARENTHESIS_CLOSE) {
parser.advance();
} else {
while (true) {
Node *arg = NULL;
Error err = parse_expression(parser, func, &arg);
if (err)
return err;
func->arguments.push_back(arg);
if (parser.get_next_token_type() == TK_PARENTHESIS_CLOSE) {
parser.advance();
break;
} else if (parser.get_next_token_type() == TK_COMMA) {
if (parser.get_next_token_type(1) == TK_PARENTHESIS_CLOSE) {
parser.set_error("Expression expected");
return ERR_PARSE_ERROR;
}
parser.advance();
} else {
// something is broken
parser.set_error("Expected ',' or ')'");
return ERR_PARSE_ERROR;
}
}
}
expr = validate_function_call(parser, func);
if (!expr) {
parser.set_error("Invalid arguments to function/constructor: " + StringName(name));
return ERR_PARSE_ERROR;
}
} else if (parser.get_next_token_type() == TK_INDENTIFIER) {
//probably variable
Node *node = p_parent;
bool existing = false;
DataType datatype;
StringName identifier = parser.get_next_token().text;
while (node) {
if (node->type == Node::TYPE_BLOCK) {
BlockNode *block = (BlockNode *)node;
if (block->variables.has(identifier)) {
existing = true;
datatype = block->variables[identifier];
break;
}
}
if (node->type == Node::TYPE_FUNCTION) {
FunctionNode *function = (FunctionNode *)node;
for (int i = 0; i < function->arguments.size(); i++) {
if (function->arguments[i].name == identifier) {
existing = true;
datatype = function->arguments[i].type;
break;
}
}
if (existing)
break;
}
if (node->type == Node::TYPE_PROGRAM) {
ProgramNode *program = (ProgramNode *)node;
if (program->builtin_variables.has(identifier)) {
datatype = program->builtin_variables[identifier];
existing = true;
break;
}
if (program->uniforms.has(identifier)) {
datatype = program->uniforms[identifier].type;
existing = true;
break;
}
}
node = node->parent;
}
if (!existing) {
parser.set_error("Nonexistent identifier in expression: " + identifier);
return ERR_PARSE_ERROR;
}
VariableNode *varname = parser.create_node<VariableNode>(p_parent);
varname->name = identifier;
varname->datatype_cache = datatype;
parser.advance();
expr = varname;
} else if (parser.get_next_token_type() == TK_OP_SUB || parser.get_next_token_type() == TK_OP_NOT) {
//single prefix operators
TokenType token_type = parser.get_next_token_type();
parser.advance();
//Node *subexpr=NULL;
//Error err = parse_expression(parser,p_parent,&subexpr);
//if (err)
// return err;
//OperatorNode *op = parser.create_node<OperatorNode>(p_parent);
Expression e;
e.is_op = true;
switch (token_type) {
case TK_OP_SUB: e.op = TK_OP_NEG; break;
case TK_OP_NOT:
e.op = TK_OP_NOT;
break;
//case TK_OP_PLUS_PLUS: op->op=OP_PLUS_PLUS; break;
//case TK_OP_MINUS_MINUS: op->op=OP_MINUS_MINUS; break;
default: ERR_FAIL_V(ERR_BUG);
}
expression.push_back(e);
continue;
} else {
print_line("found bug?");
print_line("misplaced token: " + String(token_names[parser.get_next_token_type()]));
parser.set_error("Error parsing expression, misplaced: " + String(token_names[parser.get_next_token_type()]));
return ERR_PARSE_ERROR;
//nothing
}
ERR_FAIL_COND_V(!expr, ERR_BUG);
/* OK now see what's NEXT to the operator.. */
/* OK now see what's NEXT to the operator.. */
/* OK now see what's NEXT to the operator.. */
if (parser.get_next_token_type() == TK_PERIOD) {
if (parser.get_next_token_type(1) != TK_INDENTIFIER) {
parser.set_error("Expected identifier as member");
return ERR_PARSE_ERROR;
}
DataType dt = compute_node_type(expr);
String ident = parser.get_next_token(1).text;
bool ok = true;
DataType member_type;
switch (dt) {
case TYPE_VEC2: {
int l = ident.length();
if (l == 1) {
member_type = TYPE_FLOAT;
} else if (l == 2) {
member_type = TYPE_VEC2;
} else {
ok = false;
break;
}
const CharType *c = ident.ptr();
for (int i = 0; i < l; i++) {
switch (c[i]) {
case 'r':
case 'g':
case 'x':
case 'y':
break;
default:
ok = false;
break;
}
}
} break;
case TYPE_VEC3: {
int l = ident.length();
if (l == 1) {
member_type = TYPE_FLOAT;
} else if (l == 2) {
member_type = TYPE_VEC2;
} else if (l == 3) {
member_type = TYPE_VEC3;
} else {
ok = false;
break;
}
const CharType *c = ident.ptr();
for (int i = 0; i < l; i++) {
switch (c[i]) {
case 'r':
case 'g':
case 'b':
case 'x':
case 'y':
case 'z':
break;
default:
ok = false;
break;
}
}
} break;
case TYPE_VEC4: {
int l = ident.length();
if (l == 1) {
member_type = TYPE_FLOAT;
} else if (l == 2) {
member_type = TYPE_VEC2;
} else if (l == 3) {
member_type = TYPE_VEC3;
} else if (l == 4) {
member_type = TYPE_VEC4;
} else {
ok = false;
break;
}
const CharType *c = ident.ptr();
for (int i = 0; i < l; i++) {
switch (c[i]) {
case 'r':
case 'g':
case 'b':
case 'a':
case 'x':
case 'y':
case 'z':
case 'w':
break;
default:
ok = false;
break;
}
}
} break;
case TYPE_MAT2:
ok = (ident == "x" || ident == "y");
member_type = TYPE_VEC2;
break;
case TYPE_MAT3:
ok = (ident == "x" || ident == "y" || ident == "z");
member_type = TYPE_VEC3;
break;
case TYPE_MAT4:
ok = (ident == "x" || ident == "y" || ident == "z" || ident == "w");
member_type = TYPE_VEC4;
break;
default: {}
}
if (!ok) {
parser.set_error("Invalid member for expression: ." + ident);
return ERR_PARSE_ERROR;
}
MemberNode *mn = parser.create_node<MemberNode>(p_parent);
mn->basetype = dt;
mn->datatype = member_type;
mn->name = ident;
mn->owner = expr;
expr = mn;
parser.advance(2);
//todo
//member (period) has priority over any operator
//creates a subindexing expression in place
} else if (parser.get_next_token_type() == TK_BRACKET_OPEN) {
//todo
//subindexing has priority over any operator
//creates a subindexing expression in place
} /*else if (parser.get_next_token_type()==TK_OP_PLUS_PLUS || parser.get_next_token_type()==TK_OP_MINUS_MINUS) {
//todo
//inc/dec operators have priority over any operator
//creates a subindexing expression in place
//return OK; //wtfs
} */
Expression e;
e.is_op = false;
e.node = expr;
expression.push_back(e);
if (is_token_operator(parser.get_next_token_type())) {
Expression o;
o.is_op = true;
o.op = parser.get_next_token_type();
expression.push_back(o);
parser.advance();
} else {
break;
}
}
/* Reduce the set set of expressions and place them in an operator tree, respecting precedence */
while (expression.size() > 1) {
int next_op = -1;
int min_priority = 0xFFFFF;
bool is_unary = false;
for (int i = 0; i < expression.size(); i++) {
if (!expression[i].is_op) {
continue;
}
bool unary = false;
int priority;
switch (expression[i].op) {
case TK_OP_NOT:
priority = 0;
unary = true;
break;
case TK_OP_NEG:
priority = 0;
unary = true;
break;
case TK_OP_MUL: priority = 1; break;
case TK_OP_DIV: priority = 1; break;
case TK_OP_ADD: priority = 2; break;
case TK_OP_SUB:
priority = 2;
break;
// shift left/right =2
case TK_OP_LESS: priority = 4; break;
case TK_OP_LESS_EQUAL: priority = 4; break;
case TK_OP_GREATER: priority = 4; break;
case TK_OP_GREATER_EQUAL: priority = 4; break;
case TK_OP_EQUAL: priority = 5; break;
case TK_OP_NOT_EQUAL:
priority = 5;
break;
//bit and =5
//bit xor =6
//bit or=7
case TK_OP_AND: priority = 8; break;
case TK_OP_OR:
priority = 9;
break;
// ?: = 10
case TK_OP_ASSIGN_ADD: priority = 11; break;
case TK_OP_ASSIGN_SUB: priority = 11; break;
case TK_OP_ASSIGN_MUL: priority = 11; break;
case TK_OP_ASSIGN_DIV: priority = 11; break;
case TK_OP_ASSIGN: priority = 11; break;
default:
ERR_FAIL_V(ERR_BUG); //unexpected operator
}
if (priority < min_priority) {
// < is used for left to right (default)
// <= is used for right to left
next_op = i;
min_priority = priority;
is_unary = unary;
}
}
ERR_FAIL_COND_V(next_op == -1, ERR_BUG);
// OK! create operator..
// OK! create operator..
if (is_unary) {
int expr_pos = next_op;
while (expression[expr_pos].is_op) {
expr_pos++;
if (expr_pos == expression.size()) {
//can happen..
parser.set_error("Unexpected end of expression..");
return ERR_BUG;
}
}
//consecutively do unary opeators
for (int i = expr_pos - 1; i >= next_op; i--) {
OperatorNode *op = parser.create_node<OperatorNode>(p_parent);
op->op = get_token_operator(expression[i].op);
op->arguments.push_back(expression[i + 1].node);
expression[i].is_op = false;
expression[i].node = validate_operator(parser, op);
if (!expression[i].node) {
String at;
for (int i = 0; i < op->arguments.size(); i++) {
if (i > 0)
at += " and ";
at += get_datatype_name(compute_node_type(op->arguments[i]));
}
parser.set_error("Invalid argument to unary operator " + String(token_names[op->op]) + ": " + at);
return ERR_PARSE_ERROR;
}
expression.remove(i + 1);
}
} else {
if (next_op < 1 || next_op >= (expression.size() - 1)) {
parser.set_error("Parser bug..");
ERR_FAIL_V(ERR_BUG);
}
OperatorNode *op = parser.create_node<OperatorNode>(p_parent);
op->op = get_token_operator(expression[next_op].op);
if (expression[next_op - 1].is_op) {
parser.set_error("Parser bug..");
ERR_FAIL_V(ERR_BUG);
}
if (expression[next_op + 1].is_op) {
// this is not invalid and can really appear
// but it becomes invalid anyway because no binary op
// can be followed by an unary op in a valid combination,
// due to how precedence works, unaries will always dissapear first
parser.set_error("Parser bug..");
}
op->arguments.push_back(expression[next_op - 1].node); //expression goes as left
op->arguments.push_back(expression[next_op + 1].node); //next expression goes as right
//replace all 3 nodes by this operator and make it an expression
expression[next_op - 1].node = validate_operator(parser, op);
if (!expression[next_op - 1].node) {
String at;
for (int i = 0; i < op->arguments.size(); i++) {
if (i > 0)
at += " and ";
at += get_datatype_name(compute_node_type(op->arguments[i]));
}
static const char *op_names[OP_MAX] = { "=", "+", "-", "*", "/", "+=", "-=", "*=", "/=", "-", "!", "==", "!=", "<=", ">=", "<", ">", "||", "&&", "call", "()" };
parser.set_error("Invalid arguments to operator " + String(op_names[op->op]) + ": " + at);
return ERR_PARSE_ERROR;
}
expression.remove(next_op);
expression.remove(next_op);
}
#if 0
OperatorNode *op = parser.create_node<OperatorNode>(p_parent);
op->op=get_token_operator(operators[next_op]);
op->arguments.push_back(expressions[next_op]); //expression goes as left
op->arguments.push_back(expressions[next_op+1]); //next expression goes as right
expressions[next_op]=validate_operator(parser,op);
if (!expressions[next_op]) {
String at;
for(int i=0;i<op->arguments.size();i++) {
if (i>0)
at+=" and ";
at+=get_datatype_name(compute_node_type(op->arguments[i]));
}
parser.set_error("Invalid arguments to operator "+String(token_names[operators[next_op]])+": "+at);
return ERR_PARSE_ERROR;
}
expressions.remove(next_op+1);
operators.remove(next_op);
#endif
}
*r_expr = expression[0].node;
return OK;
/*
TokenType token_type=parser.get_next_token_type();
OperatorNode *op = parser.create_node<OperatorNode>(p_parent);
op->op=get_token_operator(parser.get_next_token_type());
op->arguments.push_back(*r_expr); //expression goes as left
parser.advance();
Node *right_expr=NULL;
Error err = parse_expression(parser,p_parent,&right_expr);
if (err)
return err;
op->arguments.push_back(right_expr);
if (!validate_operator(op)) {
parser.set_error("Invalid arguments to operator "+String(token_names[token_type]));
return ERR_PARSE_ERROR;
}
*/
}
Error ShaderLanguage::parse_variable_declaration(Parser &parser, BlockNode *p_block) {
bool uniform = parser.get_next_token(-1).type == TK_UNIFORM;
DataType type = get_token_datatype(parser.get_next_token_type(0));
bool iscolor = parser.get_next_token_type(0) == TK_TYPE_COLOR;
if (type == TYPE_VOID) {
parser.set_error("Cannot Declare a 'void' Variable");
return ERR_PARSE_ERROR;
}
if (type == TYPE_TEXTURE && !uniform) {
parser.set_error("Cannot Declare a Non-Uniform Texture");
return ERR_PARSE_ERROR;
}
if (type == TYPE_CUBEMAP && !uniform) {
parser.set_error("Cannot Declare a Non-Uniform Cubemap");
return ERR_PARSE_ERROR;
}
parser.advance();
int found = 0;
while (true) {
if (found && parser.get_next_token_type() != TK_COMMA) {
break;
}
if (parser.get_next_token_type() != TK_INDENTIFIER) {
parser.set_error("Identifier Expected");
return ERR_PARSE_ERROR;
}
StringName name = parser.get_next_token().text;
if (test_existing_identifier(p_block, name)) {
parser.set_error("Duplicate Identifier (existing variable/function): " + name);
return ERR_PARSE_ERROR;
}
found = true;
parser.advance();
//see if declaration has an initializer
if (parser.get_next_token_type() == TK_OP_ASSIGN) {
parser.advance();
OperatorNode *op = parser.create_node<OperatorNode>(p_block);
VariableNode *var = parser.create_node<VariableNode>(op);
var->name = name;
var->datatype_cache = type;
var->uniform = uniform;
Node *expr;
Error err = parse_expression(parser, p_block, &expr);
if (err)
return err;
if (var->uniform) {
if (expr->type != Node::TYPE_CONSTANT) {
parser.set_error("Uniform can only be initialized to a constant.");
return ERR_PARSE_ERROR;
}
Uniform u;
u.order = parser.program->uniforms.size();
u.type = type;
u.default_value = static_cast<ConstantNode *>(expr)->value;
if (iscolor && u.default_value.get_type() == Variant::PLANE) {
Color c;
Plane p = u.default_value;
c = Color(p.normal.x, p.normal.y, p.normal.z, p.d);
u.default_value = c;
}
parser.program->uniforms[var->name] = u;
} else {
op->op = OP_ASSIGN;
op->arguments.push_back(var);
op->arguments.push_back(expr);
Node *n = validate_operator(parser, op);
if (!n) {
parser.set_error("Invalid initializer for variable: " + name);
return ERR_PARSE_ERROR;
}
p_block->statements.push_back(n);
}
} else {
//initialize it EMPTY
OperatorNode *op = parser.create_node<OperatorNode>(p_block);
VariableNode *var = parser.create_node<VariableNode>(op);
ConstantNode *con = parser.create_node<ConstantNode>(op);
var->name = name;
var->datatype_cache = type;
var->uniform = uniform;
con->datatype = type;
switch (type) {
case TYPE_BOOL: con->value = false; break;
case TYPE_FLOAT: con->value = 0.0; break;
case TYPE_VEC2: con->value = Vector2(); break;
case TYPE_VEC3: con->value = Vector3(); break;
case TYPE_VEC4: con->value = iscolor ? Variant(Color()) : Variant(Plane()); break;
case TYPE_MAT2: con->value = Matrix32(); break;
case TYPE_MAT3: con->value = Matrix3(); break;
case TYPE_MAT4: con->value = Transform(); break;
case TYPE_TEXTURE:
case TYPE_CUBEMAP: con->value = RID(); break;
default: {}
}
if (uniform) {
Uniform u;
u.type = type;
u.default_value = con->value;
u.order = parser.program->uniforms.size();
parser.program->uniforms[var->name] = u;
} else {
op->op = OP_ASSIGN;
op->arguments.push_back(var);
op->arguments.push_back(con);
p_block->statements.push_back(op);
}
}
if (!uniform)
p_block->variables[name] = type;
}
if (parser.get_next_token_type() != TK_SEMICOLON) {
parser.set_error("Expected ';'");
return ERR_PARSE_ERROR;
}
return OK;
}
Error ShaderLanguage::parse_flow_if(Parser &parser, Node *p_parent, Node **r_statement) {
ControlFlowNode *cf = parser.create_node<ControlFlowNode>(p_parent);
cf->flow_op = FLOW_OP_IF;
parser.advance();
if (parser.get_next_token_type() != TK_PARENTHESIS_OPEN) {
parser.set_error("Expected '(' after 'if'");
return ERR_PARSE_ERROR;
}
parser.advance();
Node *expression = NULL;
Error err = parse_expression(parser, cf, &expression);
if (err)
return err;
if (compute_node_type(expression) != TYPE_BOOL) {
parser.set_error("Expression for 'if' is not boolean");
return ERR_PARSE_ERROR;
}
cf->statements.push_back(expression);
if (parser.get_next_token_type() != TK_PARENTHESIS_CLOSE) {
parser.set_error("Expected ')' after expression");
return ERR_PARSE_ERROR;
}
parser.advance();
if (parser.get_next_token_type() != TK_CURLY_BRACKET_OPEN) {
parser.set_error("Expected statement block after 'if()'");
return ERR_PARSE_ERROR;
}
Node *substatement = NULL;
err = parse_statement(parser, cf, &substatement);
if (err)
return err;
cf->statements.push_back(substatement);
if (parser.get_next_token_type() == TK_CF_ELSE) {
parser.advance();
if (parser.get_next_token_type() != TK_CURLY_BRACKET_OPEN) {
parser.set_error("Expected statement block after 'else'");
return ERR_PARSE_ERROR;
}
substatement = NULL;
err = parse_statement(parser, cf, &substatement);
if (err)
return err;
cf->statements.push_back(substatement);
}
*r_statement = cf;
return OK;
}
Error ShaderLanguage::parse_flow_return(Parser &parser, Node *p_parent, Node **r_statement) {
FunctionNode *function = NULL;
Node *parent = p_parent;
while (parent) {
if (parent->type == Node::TYPE_FUNCTION) {
function = (FunctionNode *)parent;
break;
}
parent = parent->parent;
}
if (!function) {
parser.set_error("'return' must be inside a function");
return ERR_PARSE_ERROR;
}
ControlFlowNode *cf = parser.create_node<ControlFlowNode>(p_parent);
cf->flow_op = FLOW_OP_RETURN;
parser.advance();
if (function->return_type != TYPE_VOID) {
// should expect a return expression.
Node *expr = NULL;
Error err = parse_expression(parser, cf, &expr);
if (err)
return err;
if (compute_node_type(expr) != function->return_type) {
parser.set_error("Invalid type for 'return' expression");
return ERR_PARSE_ERROR;
}
cf->statements.push_back(expr);
}
*r_statement = cf;
if (parser.get_next_token_type() != TK_SEMICOLON) {
parser.set_error("Expected ';'");
return ERR_PARSE_ERROR;
}
return OK;
}
Error ShaderLanguage::parse_statement(Parser &parser, Node *p_parent, Node **r_statement) {
*r_statement = NULL;
TokenType token_type = parser.get_next_token_type();
if (token_type == TK_CURLY_BRACKET_OPEN) {
//sub-block
parser.advance();
BlockNode *block = parser.create_node<BlockNode>(p_parent);
*r_statement = block;
return parse_block(parser, block);
} else if (token_type == TK_SEMICOLON) {
// empty ;
parser.advance();
return OK;
} else if (token_type == TK_CF_IF) {
return parse_flow_if(parser, p_parent, r_statement);
} else if (token_type == TK_CF_RETURN) {
return parse_flow_return(parser, p_parent, r_statement);
} else {
Error err = parse_expression(parser, p_parent, r_statement);
if (err)
return err;
if (parser.get_next_token_type() != TK_SEMICOLON) {
parser.set_error("Expected ';'");
return ERR_PARSE_ERROR;
}
}
return OK;
}
Error ShaderLanguage::parse_block(Parser &parser, BlockNode *p_block) {
while (true) {
if (parser.is_at_end()) {
if (p_block->parent->type != Node::TYPE_PROGRAM) {
parser.set_error("Unexpected End of File");
return ERR_PARSE_ERROR;
}
return OK; //bye
}
TokenType token_type = parser.get_next_token_type();
if (token_type == TK_CURLY_BRACKET_CLOSE) {
if (p_block->parent->type == Node::TYPE_PROGRAM) {
parser.set_error("Unexpected '}'");
return ERR_PARSE_ERROR;
}
parser.advance();
return OK; // exit block
} else if (token_type == TK_UNIFORM) {
if (p_block != parser.program->body) {
parser.set_error("Uniform only allowed in main program body.");
return ERR_PARSE_ERROR;
}
parser.advance();
Error err = parse_variable_declaration(parser, p_block);
if (err)
return err;
} else if (is_token_datatype(token_type)) {
Error err = OK;
if (parser_is_at_function(parser))
err = parse_function(parser, p_block);
else {
err = parse_variable_declaration(parser, p_block);
}
if (err)
return err;
} else {
// must be a statement
Node *statement = NULL;
Error err = parse_statement(parser, p_block, &statement);
if (err)
return err;
if (statement) {
p_block->statements.push_back(statement);
}
}
}
return OK;
}
Error ShaderLanguage::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) {
Parser parser(p_tokens);
parser.program = parser.create_node<ProgramNode>(NULL);
parser.program->body = parser.create_node<BlockNode>(parser.program);
//add builtins
switch (p_type) {
case SHADER_MATERIAL_VERTEX: {
int idx = 0;
while (vertex_builtins_defs[idx].name) {
parser.program->builtin_variables[vertex_builtins_defs[idx].name] = vertex_builtins_defs[idx].type;
idx++;
}
} break;
case SHADER_MATERIAL_FRAGMENT: {
int idx = 0;
while (fragment_builtins_defs[idx].name) {
parser.program->builtin_variables[fragment_builtins_defs[idx].name] = fragment_builtins_defs[idx].type;
idx++;
}
} break;
case SHADER_MATERIAL_LIGHT: {
int idx = 0;
while (light_builtins_defs[idx].name) {
parser.program->builtin_variables[light_builtins_defs[idx].name] = light_builtins_defs[idx].type;
idx++;
}
} break;
case SHADER_CANVAS_ITEM_VERTEX: {
int idx = 0;
while (ci_vertex_builtins_defs[idx].name) {
parser.program->builtin_variables[ci_vertex_builtins_defs[idx].name] = ci_vertex_builtins_defs[idx].type;
idx++;
}
} break;
case SHADER_CANVAS_ITEM_FRAGMENT: {
int idx = 0;
while (ci_fragment_builtins_defs[idx].name) {
parser.program->builtin_variables[ci_fragment_builtins_defs[idx].name] = ci_fragment_builtins_defs[idx].type;
idx++;
}
} break;
case SHADER_CANVAS_ITEM_LIGHT: {
int idx = 0;
while (ci_light_builtins_defs[idx].name) {
parser.program->builtin_variables[ci_light_builtins_defs[idx].name] = ci_light_builtins_defs[idx].type;
idx++;
}
} break;
case SHADER_POST_PROCESS: {
int idx = 0;
while (postprocess_fragment_builtins_defs[idx].name) {
parser.program->builtin_variables[postprocess_fragment_builtins_defs[idx].name] = postprocess_fragment_builtins_defs[idx].type;
idx++;
}
} break;
}
Error err = parse_block(parser, parser.program->body);
if (err) {
parser.get_error(r_error, r_err_line, r_err_column);
return err;
}
if (p_compile_func) {
err = p_compile_func(p_userdata, parser.program);
}
//clean up nodes created
while (parser.nodegc.size()) {
memdelete(parser.nodegc.front()->get());
parser.nodegc.pop_front();
}
return err;
}
Error ShaderLanguage::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) {
*r_error = "";
*r_err_line = 0;
*r_err_column = 0;
Vector<Token> tokens;
Error err = tokenize(p_code, &tokens, r_error, r_err_line, r_err_column);
if (err != OK) {
print_line("tokenizer error!");
}
if (err != OK) {
return err;
}
err = parse(tokens, p_type, p_compile_func, p_userdata, r_error, r_err_line, r_err_column);
if (err != OK) {
return err;
}
return OK;
}
void ShaderLanguage::get_keyword_list(ShaderType p_type, List<String> *p_keywords) {
int idx = 0;
p_keywords->push_back("uniform");
p_keywords->push_back("texture");
p_keywords->push_back("cubemap");
p_keywords->push_back("color");
p_keywords->push_back("if");
p_keywords->push_back("else");
while (intrinsic_func_defs[idx].name) {
p_keywords->push_back(intrinsic_func_defs[idx].name);
idx++;
}
switch (p_type) {
case SHADER_MATERIAL_VERTEX: {
idx = 0;
while (vertex_builtins_defs[idx].name) {
p_keywords->push_back(vertex_builtins_defs[idx].name);
idx++;
}
} break;
case SHADER_MATERIAL_FRAGMENT: {
idx = 0;
while (fragment_builtins_defs[idx].name) {
p_keywords->push_back(fragment_builtins_defs[idx].name);
idx++;
}
} break;
case SHADER_MATERIAL_LIGHT: {
idx = 0;
while (light_builtins_defs[idx].name) {
p_keywords->push_back(light_builtins_defs[idx].name);
idx++;
}
} break;
case SHADER_CANVAS_ITEM_VERTEX: {
idx = 0;
while (ci_vertex_builtins_defs[idx].name) {
p_keywords->push_back(ci_vertex_builtins_defs[idx].name);
idx++;
}
} break;
case SHADER_CANVAS_ITEM_FRAGMENT: {
idx = 0;
while (ci_fragment_builtins_defs[idx].name) {
p_keywords->push_back(ci_fragment_builtins_defs[idx].name);
idx++;
}
} break;
case SHADER_CANVAS_ITEM_LIGHT: {
idx = 0;
while (ci_light_builtins_defs[idx].name) {
p_keywords->push_back(ci_light_builtins_defs[idx].name);
idx++;
}
} break;
case SHADER_POST_PROCESS: {
idx = 0;
while (postprocess_fragment_builtins_defs[idx].name) {
p_keywords->push_back(postprocess_fragment_builtins_defs[idx].name);
idx++;
}
} break;
}
}
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