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virtualx-engine/servers/visual/shader_language.cpp
Juan Linietsky 0b806ee0fc GODOT IS OPEN SOURCE
2014-02-09 22:10:30 -03:00

2385 lines
60 KiB
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/*************************************************************************/
/* shader_language.cpp */
/*************************************************************************/
/* 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. */
/*************************************************************************/
#include "shader_language.h"
#include "print_string.h"
#include "os/os.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_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')
break;
if (GETCHAR(r_chars+1)=='*' && GETCHAR(r_chars+2)=='/')
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++;
}
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);
}
return Token(TK_ERROR,"Unknown character");
} 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;
while(pos<len) {
int advance=0;
int prev_line=line;
Token t = read_token(&p_text[pos],len-pos,line,advance);
t.line=prev_line;
if (t.type==TK_ERROR) {
if (r_error) {
return ERR_COMPILATION_FAILED;
*r_error=t.text;
*r_err_line=line;
}
}
if (t.type!=TK_EMPTY)
p_tokens->push_back(t);
//if (prev_line!=line)
// p_tokens->push_back(Token(TK_LINE,itos(line)));
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_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_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_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_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_token_type(0)) && parser.get_token_type(1)==TK_INDENTIFIER && parser.get_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_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_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_token_type(ofs)==TK_PARENTHESIS_CLOSE) {
ofs++;
break;
}
//next argument awaits
if (parser.get_token_type(ofs)==TK_COMMA) {
if (!is_token_nonvoid_datatype(parser.get_token_type(ofs+1))) {
parser.set_error("Expected Identifier or ')' following ','");
return ERR_PARSE_ERROR;
}
ofs++;
continue;
}
if (!is_token_nonvoid_datatype(parser.get_token_type(ofs+0))) {
parser.set_error("Invalid Argument Type");
return ERR_PARSE_ERROR;
}
DataType identtype=get_token_datatype(parser.get_token_type(ofs+0));
if (parser.get_token_type(ofs+1)!=TK_INDENTIFIER) {
parser.set_error("Expected Argument Identifier");
return ERR_PARSE_ERROR;
}
StringName identname=parser.get_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_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_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_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}},
{"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}},
{"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_VEC3,{TYPE_VEC3,TYPE_VEC3,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}},
//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_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_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_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_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_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_MAT3,TYPE_VEC2}},
{OP_ASSIGN_MUL,TYPE_VOID,{TYPE_MAT4,TYPE_VEC2}},
{OP_ASSIGN_MUL,TYPE_VOID,{TYPE_VEC3,TYPE_VEC3}},
{OP_ASSIGN_MUL,TYPE_VOID,{TYPE_VEC3,TYPE_FLOAT}},
{OP_ASSIGN_MUL,TYPE_VOID,{TYPE_MAT3,TYPE_VEC3}},
{OP_ASSIGN_MUL,TYPE_VOID,{TYPE_MAT4,TYPE_VEC3}},
{OP_ASSIGN_MUL,TYPE_VOID,{TYPE_VEC4,TYPE_VEC4}},
{OP_ASSIGN_MUL,TYPE_VOID,{TYPE_VEC4,TYPE_FLOAT}},
{OP_ASSIGN_MUL,TYPE_VOID,{TYPE_MAT4,TYPE_VEC4}},
{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_FLOAT,{TYPE_FLOAT,TYPE_FLOAT}},
{OP_CMP_EQ,TYPE_VEC2,{TYPE_VEC3,TYPE_VEC2}},
{OP_CMP_EQ,TYPE_VEC3,{TYPE_VEC3,TYPE_VEC3}},
{OP_CMP_EQ,TYPE_VEC4,{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_FLOAT,{TYPE_FLOAT,TYPE_FLOAT}},
{OP_CMP_NEQ,TYPE_VEC3,{TYPE_VEC2,TYPE_VEC2}},
{OP_CMP_NEQ,TYPE_VEC3,{TYPE_VEC3,TYPE_VEC3}},
{OP_CMP_NEQ,TYPE_VEC3,{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[]={
{ "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},
{ "INSTANCE_ID", TYPE_FLOAT},
{ "TIME", TYPE_FLOAT},
{ NULL, TYPE_VOID},
};
const ShaderLanguage::BuiltinsDef ShaderLanguage::fragment_builtins_defs[]={
{ "VERTEX", TYPE_VEC3},
{ "POSITION", TYPE_VEC3},
{ "NORMAL", TYPE_VEC3},
{ "TANGENT", TYPE_VEC3},
{ "BINORMAL", TYPE_VEC3},
{ "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_FLOAT},
{ "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::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) {
bool all_const=false;
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: data = Vector2(cdata[0],cdata[1]); break;
case TYPE_VEC3: data = Vector3(cdata[0],cdata[1],cdata[2]); break;
case TYPE_VEC4: 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) {
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<Node*> expressions;
Vector<TokenType> operators;
while(true) {
Node *expr=NULL;
if (parser.get_token_type()==TK_PARENTHESIS_OPEN) {
//handle subexpression
parser.advance();
Error err = parse_expression(parser,p_parent,&expr);
if (err)
return err;
if (parser.get_token_type()!=TK_PARENTHESIS_CLOSE) {
parser.set_error("Expected ')' in expression");
return ERR_PARSE_ERROR;
}
parser.advance();
} else if (parser.get_token_type()==TK_REAL_CONSTANT) {
ConstantNode *constant = parser.create_node<ConstantNode>(p_parent);
constant->value=parser.get_token().text.operator String().to_double();
constant->datatype=TYPE_FLOAT;
expr=constant;
parser.advance();
} else if (parser.get_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_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_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_token_type(1)==TK_PARENTHESIS_OPEN && (is_token_nonvoid_datatype(parser.get_token_type()) || parser.get_token_type()==TK_INDENTIFIER)) {
//function or constructor
StringName name;
DataType constructor=TYPE_VOID;
if (is_token_nonvoid_datatype(parser.get_token_type())) {
constructor=get_token_datatype(parser.get_token_type());
switch(get_token_datatype(parser.get_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_MAT3: name="mat3"; break;
case TYPE_MAT4: name="mat4"; break;
default: ERR_FAIL_V(ERR_BUG);
}
} else {
name=parser.get_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_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_token_type()==TK_PARENTHESIS_CLOSE) {
parser.advance();
break;
} else if (parser.get_token_type()==TK_COMMA) {
if (parser.get_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_token_type()==TK_INDENTIFIER) {
//probably variable
Node *node =p_parent;
bool existing=false;
DataType datatype;
StringName identifier=parser.get_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("Unexisting 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_token_type()==TK_OP_NEG || parser.get_token_type()==TK_OP_NOT) {
//single prefix operators
TokenType token_type=parser.get_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);
switch(token_type) {
case TK_OP_NEG: op->op=OP_NEG; break;
case TK_OP_NOT: op->op=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);
}
op->arguments.push_back(subexpr);
expr=validate_operator(parser,op);
if (!expr) {
parser.set_error("Invalid argument for negation operator");
return ERR_PARSE_ERROR;
}
} else {
print_line("found bug?");
print_line("misplaced token: "+String(token_names[parser.get_token_type()]));
parser.set_error("Error parsing expression, misplaced: "+String(token_names[parser.get_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_token_type()==TK_PERIOD) {
if (parser.get_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_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_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_token_type()==TK_BRACKET_OPEN) {
//todo
//subindexing has priority over any operator
//creates a subindexing expression in place
} /*else if (parser.get_token_type()==TK_OP_PLUS_PLUS || parser.get_token_type()==TK_OP_MINUS_MINUS) {
//todo
//inc/dec operators have priority over any operator
//creates a subindexing expression in place
//return OK; //wtfs
} */
expressions.push_back(expr);
if (is_token_operator(parser.get_token_type())) {
operators.push_back(parser.get_token_type());
parser.advance();
} else {
break;
}
}
ERR_FAIL_COND_V(expressions.size()!=(operators.size()+1),ERR_BUG);
/* Reduce the set set of expressions and place them in an operator tree, respecting precedence */
while(expressions.size()>1) {
int next_op=-1;
int min_priority=0xFFFFF;
for(int i=0;i<operators.size();i++) {
int priority;
switch(operators[i]) {
case TK_OP_MUL: priority=0; break;
case TK_OP_DIV: priority=0; break;
case TK_OP_ADD: priority=1; break;
case TK_OP_SUB: priority=1; break;
// shift left/right =2
case TK_OP_LESS: priority=3; break;
case TK_OP_LESS_EQUAL: priority=3; break;
case TK_OP_GREATER: priority=3; break;
case TK_OP_GREATER_EQUAL: priority=3; break;
case TK_OP_EQUAL: priority=4; break;
case TK_OP_NOT_EQUAL: priority=4; 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;
}
}
ERR_FAIL_COND_V(next_op==-1,ERR_BUG);
// OK! create operator..
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);
}
*r_expr=expressions[0];
return OK;
/*
TokenType token_type=parser.get_token_type();
OperatorNode *op = parser.create_node<OperatorNode>(p_parent);
op->op=get_token_operator(parser.get_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_token(-1).type==TK_UNIFORM;
DataType type=get_token_datatype(parser.get_token_type(0));
bool iscolor = parser.get_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_token_type()!=TK_COMMA) {
break;
}
if (parser.get_token_type()!=TK_INDENTIFIER) {
parser.set_error("Identifier Expected");
return ERR_PARSE_ERROR;
}
StringName name = parser.get_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_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_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_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_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_token_type()!=TK_PARENTHESIS_CLOSE) {
parser.set_error("Expected ')' after expression");
return ERR_PARSE_ERROR;
}
parser.advance();
Node *substatement=NULL;
err = parse_statement(parser,cf,&substatement);
if (err)
return err;
cf->statements.push_back(substatement);
if (parser.get_token_type()==TK_CF_ELSE) {
parser.advance();
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_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_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_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_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) {
uint64_t t = OS::get_singleton()->get_ticks_usec();
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_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;
}
double tf = (OS::get_singleton()->get_ticks_usec()-t)/1000.0;
//print_line("parse time: "+rtos(tf));
t = OS::get_singleton()->get_ticks_usec();
if (p_compile_func)
p_compile_func(p_userdata,parser.program);
tf = (OS::get_singleton()->get_ticks_usec()-t)/1000.0;
//print_line("compile time: "+rtos(tf));
//clean up nodes created
while(parser.nodegc.size()) {
memdelete( parser.nodegc.front()->get() );
parser.nodegc.pop_front();
}
return OK;
}
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;
uint64_t t = OS::get_singleton()->get_ticks_usec();
Error err = tokenize(p_code,&tokens,r_error,r_err_line,r_err_column);
double tf = (OS::get_singleton()->get_ticks_usec()-t)/1000.0;
//print_line("tokenize time: "+rtos(tf));
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) {
//print_line("LDEBUG: "+lex_debug(p_code));
return err;
}
return OK;
}
void ShaderLanguage::get_keyword_list(ShaderType p_type, List<String> *p_keywords) {
int idx=0;
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_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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