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shader_language.cpp
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/**************************************************************************/
/* shader_language.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#include "shader_language.h"
#include "core/os/os.h"
#include "core/templates/local_vector.h"
#include "servers/rendering/renderer_compositor.h"
#include "servers/rendering/rendering_server_globals.h"
#include "servers/rendering_server.h"
#include "shader_types.h"
#define HAS_WARNING(flag) (warning_flags & flag)
SafeNumeric<int> ShaderLanguage::instance_counter;
String ShaderLanguage::get_operator_text(Operator p_op) {
static const char *op_names[OP_MAX] = { "==",
"!=",
"<",
"<=",
">",
">=",
"&&",
"||",
"!",
"-",
"+",
"-",
"*",
"/",
"%",
"<<",
">>",
"=",
"+=",
"-=",
"*=",
"/=",
"%=",
"<<=",
">>=",
"&=",
"|=",
"^=",
"&",
"|",
"^",
"~",
"++",
"--",
"?",
":",
"++",
"--",
"()",
"construct",
"index",
"empty" };
return op_names[p_op];
}
const char *ShaderLanguage::token_names[TK_MAX] = {
"EMPTY",
"IDENTIFIER",
"TRUE",
"FALSE",
"FLOAT_CONSTANT",
"INT_CONSTANT",
"UINT_CONSTANT",
"STRING_CONSTANT",
"TYPE_VOID",
"TYPE_BOOL",
"TYPE_BVEC2",
"TYPE_BVEC3",
"TYPE_BVEC4",
"TYPE_INT",
"TYPE_IVEC2",
"TYPE_IVEC3",
"TYPE_IVEC4",
"TYPE_UINT",
"TYPE_UVEC2",
"TYPE_UVEC3",
"TYPE_UVEC4",
"TYPE_FLOAT",
"TYPE_VEC2",
"TYPE_VEC3",
"TYPE_VEC4",
"TYPE_MAT2",
"TYPE_MAT3",
"TYPE_MAT4",
"TYPE_SAMPLER2D",
"TYPE_ISAMPLER2D",
"TYPE_USAMPLER2D",
"TYPE_SAMPLER2DARRAY",
"TYPE_ISAMPLER2DARRAY",
"TYPE_USAMPLER2DARRAY",
"TYPE_SAMPLER3D",
"TYPE_ISAMPLER3D",
"TYPE_USAMPLER3D",
"TYPE_SAMPLERCUBE",
"TYPE_SAMPLERCUBEARRAY",
"TYPE_SAMPLEREXT",
"INTERPOLATION_FLAT",
"INTERPOLATION_SMOOTH",
"CONST",
"STRUCT",
"PRECISION_LOW",
"PRECISION_MID",
"PRECISION_HIGH",
"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_MOD",
"OP_SHIFT_LEFT",
"OP_SHIFT_RIGHT",
"OP_ASSIGN",
"OP_ASSIGN_ADD",
"OP_ASSIGN_SUB",
"OP_ASSIGN_MUL",
"OP_ASSIGN_DIV",
"OP_ASSIGN_MOD",
"OP_ASSIGN_SHIFT_LEFT",
"OP_ASSIGN_SHIFT_RIGHT",
"OP_ASSIGN_BIT_AND",
"OP_ASSIGN_BIT_OR",
"OP_ASSIGN_BIT_XOR",
"OP_BIT_AND",
"OP_BIT_OR",
"OP_BIT_XOR",
"OP_BIT_INVERT",
"OP_INCREMENT",
"OP_DECREMENT",
"CF_IF",
"CF_ELSE",
"CF_FOR",
"CF_WHILE",
"CF_DO",
"CF_SWITCH",
"CF_CASE",
"CF_DEFAULT",
"CF_BREAK",
"CF_CONTINUE",
"CF_RETURN",
"CF_DISCARD",
"BRACKET_OPEN",
"BRACKET_CLOSE",
"CURLY_BRACKET_OPEN",
"CURLY_BRACKET_CLOSE",
"PARENTHESIS_OPEN",
"PARENTHESIS_CLOSE",
"QUESTION",
"COMMA",
"COLON",
"SEMICOLON",
"PERIOD",
"UNIFORM",
"UNIFORM_GROUP",
"INSTANCE",
"GLOBAL",
"VARYING",
"ARG_IN",
"ARG_OUT",
"ARG_INOUT",
"RENDER_MODE",
"HINT_DEFAULT_WHITE_TEXTURE",
"HINT_DEFAULT_BLACK_TEXTURE",
"HINT_DEFAULT_TRANSPARENT_TEXTURE",
"HINT_NORMAL_TEXTURE",
"HINT_ROUGHNESS_NORMAL_TEXTURE",
"HINT_ROUGHNESS_R",
"HINT_ROUGHNESS_G",
"HINT_ROUGHNESS_B",
"HINT_ROUGHNESS_A",
"HINT_ROUGHNESS_GRAY",
"HINT_ANISOTROPY_TEXTURE",
"HINT_SOURCE_COLOR",
"HINT_COLOR_CONVERSION_DISABLED",
"HINT_RANGE",
"HINT_ENUM",
"HINT_INSTANCE_INDEX",
"HINT_SCREEN_TEXTURE",
"HINT_NORMAL_ROUGHNESS_TEXTURE",
"HINT_DEPTH_TEXTURE",
"FILTER_NEAREST",
"FILTER_LINEAR",
"FILTER_NEAREST_MIPMAP",
"FILTER_LINEAR_MIPMAP",
"FILTER_NEAREST_MIPMAP_ANISOTROPIC",
"FILTER_LINEAR_MIPMAP_ANISOTROPIC",
"REPEAT_ENABLE",
"REPEAT_DISABLE",
"SHADER_TYPE",
"CURSOR",
"ERROR",
"EOF",
};
String ShaderLanguage::get_token_text(Token p_token) {
String name = token_names[p_token.type];
if (p_token.is_integer_constant() || p_token.type == TK_FLOAT_CONSTANT) {
name += "(" + rtos(p_token.constant) + ")";
} else if (p_token.type == TK_IDENTIFIER) {
name += "(" + String(p_token.text) + ")";
} else if (p_token.type == TK_ERROR) {
name += "(" + String(p_token.text) + ")";
}
return name;
}
ShaderLanguage::Token ShaderLanguage::_make_token(TokenType p_type, const StringName &p_text) {
Token tk;
tk.type = p_type;
tk.text = p_text;
tk.line = tk_line;
if (tk.type == TK_ERROR) {
_set_error(p_text);
}
return tk;
}
enum ContextFlag : uint32_t {
CF_UNSPECIFIED = 0U,
CF_BLOCK = 1U, // "void test() { <x> }"
CF_FUNC_DECL_PARAM_SPEC = 2U, // "void test(<x> int param) {}"
CF_FUNC_DECL_PARAM_TYPE = 4U, // "void test(<x> param) {}"
CF_IF_DECL = 8U, // "if(<x>) {}"
CF_BOOLEAN = 16U, // "bool t = <x>;"
CF_GLOBAL_SPACE = 32U, // "struct", "const", "void" etc.
CF_DATATYPE = 64U, // "<x> value;"
CF_UNIFORM_TYPE = 128U, // "uniform <x> myUniform;"
CF_VARYING_TYPE = 256U, // "varying <x> myVarying;"
CF_PRECISION_MODIFIER = 512U, // "<x> vec4 a = vec4(0.0, 1.0, 2.0, 3.0);"
CF_INTERPOLATION_QUALIFIER = 1024U, // "varying <x> vec3 myColor;"
CF_UNIFORM_KEYWORD = 2048U, // "uniform"
CF_CONST_KEYWORD = 4096U, // "const"
CF_UNIFORM_QUALIFIER = 8192U, // "<x> uniform float t;"
CF_SHADER_TYPE = 16384U, // "shader_type"
};
const uint32_t KCF_DATATYPE = CF_BLOCK | CF_GLOBAL_SPACE | CF_DATATYPE | CF_FUNC_DECL_PARAM_TYPE | CF_UNIFORM_TYPE;
const uint32_t KCF_SAMPLER_DATATYPE = CF_FUNC_DECL_PARAM_TYPE | CF_UNIFORM_TYPE;
const ShaderLanguage::KeyWord ShaderLanguage::keyword_list[] = {
{ TK_TRUE, "true", CF_BLOCK | CF_IF_DECL | CF_BOOLEAN, {}, {} },
{ TK_FALSE, "false", CF_BLOCK | CF_IF_DECL | CF_BOOLEAN, {}, {} },
// data types
{ TK_TYPE_VOID, "void", CF_GLOBAL_SPACE, {}, {} },
{ TK_TYPE_BOOL, "bool", KCF_DATATYPE, {}, {} },
{ TK_TYPE_BVEC2, "bvec2", KCF_DATATYPE, {}, {} },
{ TK_TYPE_BVEC3, "bvec3", KCF_DATATYPE, {}, {} },
{ TK_TYPE_BVEC4, "bvec4", KCF_DATATYPE, {}, {} },
{ TK_TYPE_INT, "int", KCF_DATATYPE, {}, {} },
{ TK_TYPE_IVEC2, "ivec2", KCF_DATATYPE, {}, {} },
{ TK_TYPE_IVEC3, "ivec3", KCF_DATATYPE, {}, {} },
{ TK_TYPE_IVEC4, "ivec4", KCF_DATATYPE, {}, {} },
{ TK_TYPE_UINT, "uint", KCF_DATATYPE, {}, {} },
{ TK_TYPE_UVEC2, "uvec2", KCF_DATATYPE, {}, {} },
{ TK_TYPE_UVEC3, "uvec3", KCF_DATATYPE, {}, {} },
{ TK_TYPE_UVEC4, "uvec4", KCF_DATATYPE, {}, {} },
{ TK_TYPE_FLOAT, "float", KCF_DATATYPE | CF_VARYING_TYPE, {}, {} },
{ TK_TYPE_VEC2, "vec2", KCF_DATATYPE | CF_VARYING_TYPE, {}, {} },
{ TK_TYPE_VEC3, "vec3", KCF_DATATYPE | CF_VARYING_TYPE, {}, {} },
{ TK_TYPE_VEC4, "vec4", KCF_DATATYPE | CF_VARYING_TYPE, {}, {} },
{ TK_TYPE_MAT2, "mat2", KCF_DATATYPE | CF_VARYING_TYPE, {}, {} },
{ TK_TYPE_MAT3, "mat3", KCF_DATATYPE | CF_VARYING_TYPE, {}, {} },
{ TK_TYPE_MAT4, "mat4", KCF_DATATYPE | CF_VARYING_TYPE, {}, {} },
{ TK_TYPE_SAMPLER2D, "sampler2D", KCF_SAMPLER_DATATYPE, {}, {} },
{ TK_TYPE_ISAMPLER2D, "isampler2D", KCF_SAMPLER_DATATYPE, {}, {} },
{ TK_TYPE_USAMPLER2D, "usampler2D", KCF_SAMPLER_DATATYPE, {}, {} },
{ TK_TYPE_SAMPLER2DARRAY, "sampler2DArray", KCF_SAMPLER_DATATYPE, {}, {} },
{ TK_TYPE_ISAMPLER2DARRAY, "isampler2DArray", KCF_SAMPLER_DATATYPE, {}, {} },
{ TK_TYPE_USAMPLER2DARRAY, "usampler2DArray", KCF_SAMPLER_DATATYPE, {}, {} },
{ TK_TYPE_SAMPLER3D, "sampler3D", KCF_SAMPLER_DATATYPE, {}, {} },
{ TK_TYPE_ISAMPLER3D, "isampler3D", KCF_SAMPLER_DATATYPE, {}, {} },
{ TK_TYPE_USAMPLER3D, "usampler3D", KCF_SAMPLER_DATATYPE, {}, {} },
{ TK_TYPE_SAMPLERCUBE, "samplerCube", KCF_SAMPLER_DATATYPE, {}, {} },
{ TK_TYPE_SAMPLERCUBEARRAY, "samplerCubeArray", KCF_SAMPLER_DATATYPE, {}, {} },
{ TK_TYPE_SAMPLEREXT, "samplerExternalOES", KCF_SAMPLER_DATATYPE, {}, {} },
// interpolation qualifiers
{ TK_INTERPOLATION_FLAT, "flat", CF_INTERPOLATION_QUALIFIER, {}, {} },
{ TK_INTERPOLATION_SMOOTH, "smooth", CF_INTERPOLATION_QUALIFIER, {}, {} },
// precision modifiers
{ TK_PRECISION_LOW, "lowp", CF_BLOCK | CF_PRECISION_MODIFIER, {}, {} },
{ TK_PRECISION_MID, "mediump", CF_BLOCK | CF_PRECISION_MODIFIER, {}, {} },
{ TK_PRECISION_HIGH, "highp", CF_BLOCK | CF_PRECISION_MODIFIER, {}, {} },
// global space keywords
{ TK_UNIFORM, "uniform", CF_GLOBAL_SPACE | CF_UNIFORM_KEYWORD, {}, {} },
{ TK_UNIFORM_GROUP, "group_uniforms", CF_GLOBAL_SPACE, {}, {} },
{ TK_VARYING, "varying", CF_GLOBAL_SPACE, { "particles", "sky", "fog" }, {} },
{ TK_CONST, "const", CF_BLOCK | CF_GLOBAL_SPACE | CF_CONST_KEYWORD, {}, {} },
{ TK_STRUCT, "struct", CF_GLOBAL_SPACE, {}, {} },
{ TK_SHADER_TYPE, "shader_type", CF_SHADER_TYPE, {}, {} },
{ TK_RENDER_MODE, "render_mode", CF_GLOBAL_SPACE, {}, {} },
// uniform qualifiers
{ TK_INSTANCE, "instance", CF_GLOBAL_SPACE | CF_UNIFORM_QUALIFIER, {}, {} },
{ TK_GLOBAL, "global", CF_GLOBAL_SPACE | CF_UNIFORM_QUALIFIER, {}, {} },
// block keywords
{ TK_CF_IF, "if", CF_BLOCK, {}, {} },
{ TK_CF_ELSE, "else", CF_BLOCK, {}, {} },
{ TK_CF_FOR, "for", CF_BLOCK, {}, {} },
{ TK_CF_WHILE, "while", CF_BLOCK, {}, {} },
{ TK_CF_DO, "do", CF_BLOCK, {}, {} },
{ TK_CF_SWITCH, "switch", CF_BLOCK, {}, {} },
{ TK_CF_CASE, "case", CF_BLOCK, {}, {} },
{ TK_CF_DEFAULT, "default", CF_BLOCK, {}, {} },
{ TK_CF_BREAK, "break", CF_BLOCK, {}, {} },
{ TK_CF_CONTINUE, "continue", CF_BLOCK, {}, {} },
{ TK_CF_RETURN, "return", CF_BLOCK, {}, {} },
{ TK_CF_DISCARD, "discard", CF_BLOCK, { "particles", "sky", "fog" }, { "vertex" } },
// function specifier keywords
{ TK_ARG_IN, "in", CF_FUNC_DECL_PARAM_SPEC, {}, {} },
{ TK_ARG_OUT, "out", CF_FUNC_DECL_PARAM_SPEC, {}, {} },
{ TK_ARG_INOUT, "inout", CF_FUNC_DECL_PARAM_SPEC, {}, {} },
// hints
{ TK_HINT_SOURCE_COLOR, "source_color", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_COLOR_CONVERSION_DISABLED, "color_conversion_disabled", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_RANGE, "hint_range", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_ENUM, "hint_enum", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_INSTANCE_INDEX, "instance_index", CF_UNSPECIFIED, {}, {} },
// sampler hints
{ TK_HINT_NORMAL_TEXTURE, "hint_normal", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_DEFAULT_WHITE_TEXTURE, "hint_default_white", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_DEFAULT_BLACK_TEXTURE, "hint_default_black", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_DEFAULT_TRANSPARENT_TEXTURE, "hint_default_transparent", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_ANISOTROPY_TEXTURE, "hint_anisotropy", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_ROUGHNESS_R, "hint_roughness_r", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_ROUGHNESS_G, "hint_roughness_g", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_ROUGHNESS_B, "hint_roughness_b", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_ROUGHNESS_A, "hint_roughness_a", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_ROUGHNESS_NORMAL_TEXTURE, "hint_roughness_normal", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_ROUGHNESS_GRAY, "hint_roughness_gray", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_SCREEN_TEXTURE, "hint_screen_texture", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_NORMAL_ROUGHNESS_TEXTURE, "hint_normal_roughness_texture", CF_UNSPECIFIED, {}, {} },
{ TK_HINT_DEPTH_TEXTURE, "hint_depth_texture", CF_UNSPECIFIED, {}, {} },
{ TK_FILTER_NEAREST, "filter_nearest", CF_UNSPECIFIED, {}, {} },
{ TK_FILTER_LINEAR, "filter_linear", CF_UNSPECIFIED, {}, {} },
{ TK_FILTER_NEAREST_MIPMAP, "filter_nearest_mipmap", CF_UNSPECIFIED, {}, {} },
{ TK_FILTER_LINEAR_MIPMAP, "filter_linear_mipmap", CF_UNSPECIFIED, {}, {} },
{ TK_FILTER_NEAREST_MIPMAP_ANISOTROPIC, "filter_nearest_mipmap_anisotropic", CF_UNSPECIFIED, {}, {} },
{ TK_FILTER_LINEAR_MIPMAP_ANISOTROPIC, "filter_linear_mipmap_anisotropic", CF_UNSPECIFIED, {}, {} },
{ TK_REPEAT_ENABLE, "repeat_enable", CF_UNSPECIFIED, {}, {} },
{ TK_REPEAT_DISABLE, "repeat_disable", CF_UNSPECIFIED, {}, {} },
{ TK_ERROR, nullptr, CF_UNSPECIFIED, {}, {} }
};
ShaderLanguage::Token ShaderLanguage::_get_token() {
#define GETCHAR(m_idx) (((char_idx + m_idx) < code.length()) ? code[char_idx + m_idx] : char32_t(0))
while (true) {
char_idx++;
switch (GETCHAR(-1)) {
case 0:
return _make_token(TK_EOF);
case 0xFFFF:
return _make_token(TK_CURSOR); //for completion
case '\t':
case '\r':
case ' ':
continue;
case '\n':
tk_line++;
continue;
case '/': {
switch (GETCHAR(0)) {
case '*': { // block comment
char_idx++;
while (true) {
if (GETCHAR(0) == 0) {
return _make_token(TK_EOF);
}
if (GETCHAR(0) == '*' && GETCHAR(1) == '/') {
char_idx += 2;
break;
} else if (GETCHAR(0) == '\n') {
tk_line++;
}
char_idx++;
}
} break;
case '/': { // line comment skip
while (true) {
if (GETCHAR(0) == '\n') {
tk_line++;
char_idx++;
break;
}
if (GETCHAR(0) == 0) {
return _make_token(TK_EOF);
}
char_idx++;
}
} break;
case '=': { // diveq
char_idx++;
return _make_token(TK_OP_ASSIGN_DIV);
} break;
default:
return _make_token(TK_OP_DIV);
}
continue; //a comment, continue to next token
} break;
case '=': {
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_EQUAL);
}
return _make_token(TK_OP_ASSIGN);
} break;
case '<': {
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_LESS_EQUAL);
} else if (GETCHAR(0) == '<') {
char_idx++;
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_ASSIGN_SHIFT_LEFT);
}
return _make_token(TK_OP_SHIFT_LEFT);
}
return _make_token(TK_OP_LESS);
} break;
case '>': {
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_GREATER_EQUAL);
} else if (GETCHAR(0) == '>') {
char_idx++;
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_ASSIGN_SHIFT_RIGHT);
}
return _make_token(TK_OP_SHIFT_RIGHT);
}
return _make_token(TK_OP_GREATER);
} break;
case '!': {
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_NOT_EQUAL);
}
return _make_token(TK_OP_NOT);
} break;
case '"': {
String _content = "";
bool _previous_backslash = false;
while (true) {
bool _ended = false;
char32_t c = GETCHAR(0);
if (c == 0) {
return _make_token(TK_ERROR, "EOF reached before string termination.");
}
switch (c) {
case '"': {
if (_previous_backslash) {
_content += '"';
_previous_backslash = false;
} else {
_ended = true;
}
break;
}
case '\\': {
if (_previous_backslash) {
_content += '\\';
}
_previous_backslash = !_previous_backslash;
break;
}
case '\n': {
return _make_token(TK_ERROR, "Unexpected end of string.");
}
default: {
if (!_previous_backslash) {
_content += c;
} else {
return _make_token(TK_ERROR, "Only \\\" and \\\\ escape characters supported.");
}
break;
}
}
char_idx++;
if (_ended) {
break;
}
}
return _make_token(TK_STRING_CONSTANT, _content);
} break;
//case '\'' //string - no strings in shader
case '{':
return _make_token(TK_CURLY_BRACKET_OPEN);
case '}':
return _make_token(TK_CURLY_BRACKET_CLOSE);
case '[':
return _make_token(TK_BRACKET_OPEN);
case ']':
return _make_token(TK_BRACKET_CLOSE);
case '(':
return _make_token(TK_PARENTHESIS_OPEN);
case ')':
return _make_token(TK_PARENTHESIS_CLOSE);
case ',':
return _make_token(TK_COMMA);
case ';':
return _make_token(TK_SEMICOLON);
case '?':
return _make_token(TK_QUESTION);
case ':':
return _make_token(TK_COLON);
case '^':
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_ASSIGN_BIT_XOR);
}
return _make_token(TK_OP_BIT_XOR);
case '~':
return _make_token(TK_OP_BIT_INVERT);
case '&': {
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_ASSIGN_BIT_AND);
} else if (GETCHAR(0) == '&') {
char_idx++;
return _make_token(TK_OP_AND);
}
return _make_token(TK_OP_BIT_AND);
} break;
case '|': {
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_ASSIGN_BIT_OR);
} else if (GETCHAR(0) == '|') {
char_idx++;
return _make_token(TK_OP_OR);
}
return _make_token(TK_OP_BIT_OR);
} break;
case '*': {
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_ASSIGN_MUL);
}
return _make_token(TK_OP_MUL);
} break;
case '+': {
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_ASSIGN_ADD);
} else if (GETCHAR(0) == '+') {
char_idx++;
return _make_token(TK_OP_INCREMENT);
}
return _make_token(TK_OP_ADD);
} break;
case '-': {
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_ASSIGN_SUB);
} else if (GETCHAR(0) == '-') {
char_idx++;
return _make_token(TK_OP_DECREMENT);
}
return _make_token(TK_OP_SUB);
} break;
case '%': {
if (GETCHAR(0) == '=') {
char_idx++;
return _make_token(TK_OP_ASSIGN_MOD);
}
return _make_token(TK_OP_MOD);
} break;
case '@': {
if (GETCHAR(0) == '@' && GETCHAR(1) == '>') {
char_idx += 2;
LocalVector<char32_t> incp;
while (GETCHAR(0) != '\n') {
incp.push_back(GETCHAR(0));
char_idx++;
}
incp.push_back(0); // Zero end it.
String include_path(incp.ptr());
include_positions.write[include_positions.size() - 1].line = tk_line;
String marker = ">>" + include_path;
if (!include_markers_handled.has(marker)) {
include_markers_handled.insert(marker);
FilePosition fp;
fp.file = include_path;
fp.line = 0;
tk_line = 0;
include_positions.push_back(fp);
}
} else if (GETCHAR(0) == '@' && GETCHAR(1) == '<') {
char_idx += 2;
LocalVector<char32_t> incp;
while (GETCHAR(0) != '\n') {
incp.push_back(GETCHAR(0));
char_idx++;
}
incp.push_back(0); // Zero end it.
String include_path(incp.ptr());
String marker = "<<" + include_path;
if (!include_markers_handled.has(marker)) {
include_markers_handled.insert(marker);
if (include_positions.size() == 1) {
return _make_token(TK_ERROR, "Invalid include exit hint @@< without matching enter hint.");
}
include_positions.resize(include_positions.size() - 1); // Pop back.
}
tk_line = include_positions[include_positions.size() - 1].line - 1; // Restore line.
} else {
return _make_token(TK_ERROR, "Invalid include enter/exit hint token (@@> and @@<)");
}
} break;
default: {
char_idx--; //go back one, since we have no idea what this is
if (is_digit(GETCHAR(0)) || (GETCHAR(0) == '.' && is_digit(GETCHAR(1)))) {
// parse number
bool hexa_found = false;
bool period_found = false;
bool exponent_found = false;
bool float_suffix_found = false;
bool uint_suffix_found = false;
bool end_suffix_found = false;
enum {
CASE_ALL,
CASE_HEXA_PERIOD,
CASE_EXPONENT,
CASE_SIGN_AFTER_EXPONENT,
CASE_NONE,
CASE_MAX,
} lut_case = CASE_ALL;
static bool suffix_lut[CASE_MAX][127];
if (!is_const_suffix_lut_initialized) {
is_const_suffix_lut_initialized = true;
for (int i = 0; i < 127; i++) {
char t = char(i);
suffix_lut[CASE_ALL][i] = t == '.' || t == 'x' || t == 'e' || t == 'f' || t == 'u' || t == '-' || t == '+';
suffix_lut[CASE_HEXA_PERIOD][i] = t == 'e' || t == 'f' || t == 'u';
suffix_lut[CASE_EXPONENT][i] = t == 'f' || t == '-' || t == '+';
suffix_lut[CASE_SIGN_AFTER_EXPONENT][i] = t == 'f';
suffix_lut[CASE_NONE][i] = false;
}
}
String str;
int i = 0;
bool digit_after_exp = false;
while (true) {
const char32_t symbol = String::char_lowercase(GETCHAR(i));
bool error = false;
if (is_digit(symbol)) {
if (exponent_found) {
digit_after_exp = true;
}
if (end_suffix_found) {
error = true;
}
} else {
if (symbol < 0x7F && suffix_lut[lut_case][symbol]) {
if (symbol == 'x') {
hexa_found = true;
lut_case = CASE_HEXA_PERIOD;
} else if (symbol == '.') {
period_found = true;
lut_case = CASE_HEXA_PERIOD;
} else if (symbol == 'e' && !hexa_found) {
exponent_found = true;
lut_case = CASE_EXPONENT;
} else if (symbol == 'f' && !hexa_found) {
if (!period_found && !exponent_found) {
error = true;
}
float_suffix_found = true;
end_suffix_found = true;
lut_case = CASE_NONE;
} else if (symbol == 'u') {
uint_suffix_found = true;
end_suffix_found = true;
lut_case = CASE_NONE;
} else if (symbol == '-' || symbol == '+') {
if (exponent_found) {
lut_case = CASE_SIGN_AFTER_EXPONENT;
} else {
break;
}
}
} else if (!hexa_found || !is_hex_digit(symbol)) {
if (is_ascii_identifier_char(symbol)) {
error = true;
} else {
break;
}
}
}
if (error) {
if (hexa_found) {
return _make_token(TK_ERROR, "Invalid (hexadecimal) numeric constant");
}
if (period_found || exponent_found || float_suffix_found) {
return _make_token(TK_ERROR, "Invalid (float) numeric constant");
}
if (uint_suffix_found) {
return _make_token(TK_ERROR, "Invalid (unsigned integer) numeric constant");
}
return _make_token(TK_ERROR, "Invalid (integer) numeric constant");
}
str += symbol;
i++;
}
char32_t last_char = str[str.length() - 1];
if (hexa_found) { // Integer (hex).
if (uint_suffix_found) {
// Strip the suffix.
str = str.left(str.length() - 1);
// Compensate reading cursor position.
char_idx += 1;
}
if (str.size() > 11 || !str.is_valid_hex_number(true)) { // > 0xFFFFFFFF
return _make_token(TK_ERROR, "Invalid (hexadecimal) numeric constant");
}
} else if (period_found || exponent_found || float_suffix_found) { // Float
if (exponent_found && (!digit_after_exp || (!is_digit(last_char) && last_char != 'f'))) { // Checks for eg: "2E", "2E-", "2E+" and 0ef, 0e+f, 0.0ef, 0.0e-f (exponent without digit after it).
return _make_token(TK_ERROR, "Invalid (float) numeric constant");
}
if (period_found) {
if (float_suffix_found) {
//checks for eg "1.f" or "1.99f" notations
if (last_char != 'f') {
return _make_token(TK_ERROR, "Invalid (float) numeric constant");
}
} else {
//checks for eg. "1." or "1.99" notations
if (last_char != '.' && !is_digit(last_char)) {
return _make_token(TK_ERROR, "Invalid (float) numeric constant");
}
}
} else if (float_suffix_found) {
// if no period found the float suffix must be the last character, like in "2f" for "2.0"
if (last_char != 'f') {
return _make_token(TK_ERROR, "Invalid (float) numeric constant");
}
}
if (float_suffix_found) {
// Strip the suffix.
str = str.left(str.length() - 1);
// Compensate reading cursor position.
char_idx += 1;
}
if (!str.is_valid_float()) {
return _make_token(TK_ERROR, "Invalid (float) numeric constant");
}
} else { // Integer
if (uint_suffix_found) {
// Strip the suffix.
str = str.left(str.length() - 1);
// Compensate reading cursor position.
char_idx += 1;
}
if (!str.is_valid_int()) {
if (uint_suffix_found) {
return _make_token(TK_ERROR, "Invalid (unsigned integer) numeric constant");
} else {
return _make_token(TK_ERROR, "Invalid (integer) numeric constant");
}
}
}
char_idx += str.length();
Token tk;
if (period_found || exponent_found || float_suffix_found) {
tk.type = TK_FLOAT_CONSTANT;
} else if (uint_suffix_found) {
tk.type = TK_UINT_CONSTANT;
} else {
tk.type = TK_INT_CONSTANT;
}
if (hexa_found) {
tk.constant = (double)str.hex_to_int();
} else {
tk.constant = str.to_float();
}
tk.line = tk_line;
return tk;
}
if (GETCHAR(0) == '.') {
//parse period
char_idx++;
return _make_token(TK_PERIOD);
}
if (is_ascii_identifier_char(GETCHAR(0))) {
// parse identifier
String str;
while (is_ascii_identifier_char(GETCHAR(0))) {
str += char32_t(GETCHAR(0));
char_idx++;
}
//see if keyword
//should be converted to a static map
int idx = 0;
while (keyword_list[idx].text) {
if (str == keyword_list[idx].text) {
return _make_token(keyword_list[idx].token);
}
idx++;
}
str = str.replace("dus_", "_");
return _make_token(TK_IDENTIFIER, str);
}
if (GETCHAR(0) > 32) {
return _make_token(TK_ERROR, "Tokenizer: Unknown character #" + itos(GETCHAR(0)) + ": '" + String::chr(GETCHAR(0)) + "'");
} else {
return _make_token(TK_ERROR, "Tokenizer: Unknown character #" + itos(GETCHAR(0)));
}
} break;
}
}
ERR_PRINT("BUG");
return Token();
#undef GETCHAR
}
bool ShaderLanguage::_lookup_next(Token &r_tk) {
TkPos pre_pos = _get_tkpos();
int line = pre_pos.tk_line;
_get_token();
Token tk = _get_token();
_set_tkpos(pre_pos);
if (tk.line == line) {
r_tk = tk;
return true;
}
return false;
}
ShaderLanguage::Token ShaderLanguage::_peek() {
TkPos pre_pos = _get_tkpos();
Token tk = _get_token();
_set_tkpos(pre_pos);
return tk;
}
String ShaderLanguage::token_debug(const String &p_code) {
clear();
code = p_code;
String output;
Token tk = _get_token();
while (tk.type != TK_EOF && tk.type != TK_ERROR) {
output += itos(tk_line) + ": " + get_token_text(tk) + "\n";
tk = _get_token();
}
return output;
}
bool ShaderLanguage::is_token_variable_datatype(TokenType p_type) {
return (
p_type == TK_TYPE_VOID ||
p_type == TK_TYPE_BOOL ||
p_type == TK_TYPE_BVEC2 ||
p_type == TK_TYPE_BVEC3 ||
p_type == TK_TYPE_BVEC4 ||
p_type == TK_TYPE_INT ||
p_type == TK_TYPE_IVEC2 ||
p_type == TK_TYPE_IVEC3 ||
p_type == TK_TYPE_IVEC4 ||
p_type == TK_TYPE_UINT ||
p_type == TK_TYPE_UVEC2 ||
p_type == TK_TYPE_UVEC3 ||
p_type == TK_TYPE_UVEC4 ||
p_type == TK_TYPE_FLOAT ||
p_type == TK_TYPE_VEC2 ||
p_type == TK_TYPE_VEC3 ||
p_type == TK_TYPE_VEC4 ||
p_type == TK_TYPE_MAT2 ||
p_type == TK_TYPE_MAT3 ||
p_type == TK_TYPE_MAT4);
}