blob: d5294aea4c7e6254dc8ed6fcc7936de7e16434a6 [file] [log] [blame]
/*
//
// Copyright 2002 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
This file contains the Lex specification for GLSL ES.
Based on ANSI C grammar, Lex specification:
http://www.lysator.liu.se/c/ANSI-C-grammar-l.html
IF YOU MODIFY THIS FILE YOU ALSO NEED TO RUN scripts/run_code_generation.py
WHICH GENERATES THE GLSL ES LEXER (glslang_lex_autogen.cpp).
*/
%top{
// GENERATED FILE - DO NOT EDIT.
// Generated by generate_parser.py from glslang.l
//
// Copyright 2019 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// glslang.l:
// Lexer for the OpenGL shading language.
// Ignore errors in auto-generated code.
#if defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wswitch-enum"
#pragma GCC diagnostic ignored "-Wunused-function"
#pragma GCC diagnostic ignored "-Wunused-variable"
#elif defined(_MSC_VER)
#pragma warning(disable: 4005)
#pragma warning(disable: 4065)
#pragma warning(disable: 4189)
#pragma warning(disable: 4244)
#pragma warning(disable: 4505)
#pragma warning(disable: 4701)
#pragma warning(disable: 4702)
#endif
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wimplicit-fallthrough"
#if defined(__APPLE__)
// Older clang versions don't have -Wextra-semi-stmt, and detecting Apple clang versions is
// difficult because they use different yet overlapping version numbers vs. regular clang.
#pragma clang diagnostic ignored "-Wunknown-warning-option"
#endif
// Flex isn't semi-colon clean.
#pragma clang diagnostic ignored "-Wextra-semi-stmt"
#pragma clang diagnostic ignored "-Wunreachable-code"
#endif
}
%{
#include "compiler/translator/glslang.h"
#include "compiler/translator/ParseContext.h"
#include "compiler/preprocessor/Token.h"
#include "compiler/translator/util.h"
#include "compiler/translator/length_limits.h"
using namespace sh;
#include "glslang_tab_autogen.h"
/* windows only pragma */
#ifdef _MSC_VER
#pragma warning(disable : 4102)
#endif
// Workaround for flex using the register keyword, deprecated in C++11.
#ifdef __cplusplus
#if __cplusplus > 199711L
#define register
#endif
#endif
#define YY_NO_INPUT
#define YY_USER_ACTION \
yylloc->first_file = yylloc->last_file = yycolumn; \
yylloc->first_line = yylloc->last_line = yylineno;
#define YY_INPUT(buf, result, max_size) \
result = string_input(buf, max_size, yyscanner);
static yy_size_t string_input(char* buf, yy_size_t max_size, yyscan_t yyscanner);
static int check_type(yyscan_t yyscanner);
static int reserved_word(yyscan_t yyscanner);
// Tests if an extension is enabled. If the extension is promoted to core, this function returns true.
static bool is_extension_enabled_or_is_core(TParseContext *context,
int extension_version, TExtension extension, int promotion_version);
// Helpers to determine if a symbol is reserved, keyword in extension or core, or identifier.
// Formatted as:
//
// [V1_reserved_][V2_extension_][V3_keyword]
//
// which means in version V1, the symbol is reserved, and remains reserved until V3. From versions
// V2 until V3, it's a keyword if the extension is enabled. From version V3 on, it's a keyword in
// the spec itself. Prior to V1, the symbol can be used as identifier.
static int ES2_reserved_ES3_keyword(TParseContext *context, int token);
static int ES2_keyword_ES3_reserved(TParseContext *context, int token);
static int ES3_keyword(TParseContext *context, int token);
static int ES3_reserved_ES3_1_keyword(TParseContext *context, int token);
static int ES2_reserved_ES3_1_keyword(TParseContext *context, int token);
static int ES3_1_keyword(TParseContext *context, int token);
static int ES2_reserved_ES2_extension_ES3_keyword(TParseContext *context, TExtension extension, int token);
static int ES3_extension(TParseContext *context, TExtension extension, int token);
static int ES3_reserved_ES3_1_extension_ES3_2_keyword(TParseContext *context, TExtension extension, int token);
static int ES3_reserved_ES3_extension(TParseContext *context, TExtension extension, int token);
static int ES3_reserved_ES3_extension_ES3_1_keyword(TParseContext *context, TExtension extension, int token);
static int ES3_1_reserved_ES3_1_extension_ES3_2_keyword(TParseContext *context, TExtension extension, int token);
static int ES3_1_reserved_ES3_1_extension_ES3_2_keyword_2(TParseContext *context, TExtension extension1, TExtension extension2, int token1, int token2);
static int WEBGL_video_texture_extension(TParseContext *context, int token);
static int uint_constant(TParseContext *context);
static int int_constant(TParseContext *context);
static int float_constant(yyscan_t yyscanner);
static int floatsuffix_check(TParseContext* context);
static int yuvcscstandardext_constant(TParseContext *context);
%}
%option noyywrap nounput never-interactive
%option yylineno reentrant bison-bridge bison-locations
%option extra-type="TParseContext*"
%x FIELDS
D [0-9]
L [a-zA-Z_]
H [a-fA-F0-9]
E [Ee][+-]?{D}+
O [0-7]
%%
%{
TParseContext* context = yyextra;
%}
"invariant" { return INVARIANT; }
"highp" { return HIGH_PRECISION; }
"mediump" { return MEDIUM_PRECISION; }
"lowp" { return LOW_PRECISION; }
"precision" { return PRECISION; }
"attribute" { return ES2_keyword_ES3_reserved(context, ATTRIBUTE); }
"const" { return CONST_QUAL; }
"uniform" { return UNIFORM; }
"buffer" { return ES3_1_keyword(context, BUFFER); }
"varying" { return ES2_keyword_ES3_reserved(context, VARYING); }
"break" { return BREAK; }
"continue" { return CONTINUE; }
"do" { return DO; }
"for" { return FOR; }
"while" { return WHILE; }
"if" { return IF; }
"else" { return ELSE; }
"switch" { return ES2_reserved_ES3_keyword(context, SWITCH); }
"case" { return ES3_keyword(context, CASE); }
"default" { return ES2_reserved_ES3_keyword(context, DEFAULT); }
"centroid" { return ES3_keyword(context, CENTROID); }
"flat" { return ES2_reserved_ES3_keyword(context, FLAT); }
"smooth" { return ES3_keyword(context, SMOOTH); }
"noperspective" { return ES3_reserved_ES3_extension(context, TExtension::NV_shader_noperspective_interpolation, NOPERSPECTIVE); }
"in" { return IN_QUAL; }
"out" { return OUT_QUAL; }
"inout" { return INOUT_QUAL; }
"shared" { return ES3_1_keyword(context, SHARED); }
"float" { return FLOAT_TYPE; }
"int" { return INT_TYPE; }
"uint" { return ES3_keyword(context, UINT_TYPE); }
"void" { return VOID_TYPE; }
"bool" { return BOOL_TYPE; }
"true" { yylval->lex.b = true; return BOOLCONSTANT; }
"false" { yylval->lex.b = false; return BOOLCONSTANT; }
"discard" { return DISCARD; }
"return" { return RETURN; }
"mat2" { return MATRIX2; }
"mat3" { return MATRIX3; }
"mat4" { return MATRIX4; }
"mat2x2" { return ES3_keyword(context, MATRIX2); }
"mat3x3" { return ES3_keyword(context, MATRIX3); }
"mat4x4" { return ES3_keyword(context, MATRIX4); }
"mat2x3" { return ES3_keyword(context, MATRIX2x3); }
"mat3x2" { return ES3_keyword(context, MATRIX3x2); }
"mat2x4" { return ES3_keyword(context, MATRIX2x4); }
"mat4x2" { return ES3_keyword(context, MATRIX4x2); }
"mat3x4" { return ES3_keyword(context, MATRIX3x4); }
"mat4x3" { return ES3_keyword(context, MATRIX4x3); }
"vec2" { return VEC2; }
"vec3" { return VEC3; }
"vec4" { return VEC4; }
"ivec2" { return IVEC2; }
"ivec3" { return IVEC3; }
"ivec4" { return IVEC4; }
"bvec2" { return BVEC2; }
"bvec3" { return BVEC3; }
"bvec4" { return BVEC4; }
"uvec2" { return ES3_keyword(context, UVEC2); }
"uvec3" { return ES3_keyword(context, UVEC3); }
"uvec4" { return ES3_keyword(context, UVEC4); }
"sampler2D" { return SAMPLER2D; }
"samplerCube" { return SAMPLERCUBE; }
"samplerExternalOES" { return SAMPLER_EXTERNAL_OES; }
"sampler3D" { return ES2_reserved_ES2_extension_ES3_keyword(context, TExtension::OES_texture_3D, SAMPLER3D); }
"sampler3DRect" { return ES2_reserved_ES3_keyword(context, SAMPLER3DRECT); }
"sampler2DRect" { return SAMPLER2DRECT; }
"sampler2DArray" { return ES3_keyword(context, SAMPLER2DARRAY); }
"sampler2DMS" { return ES3_reserved_ES3_extension_ES3_1_keyword(context, TExtension::ANGLE_texture_multisample, SAMPLER2DMS); }
"isampler2D" { return ES3_keyword(context, ISAMPLER2D); }
"isampler3D" { return ES3_keyword(context, ISAMPLER3D); }
"isamplerCube" { return ES3_keyword(context, ISAMPLERCUBE); }
"isampler2DArray" { return ES3_keyword(context, ISAMPLER2DARRAY); }
"isampler2DMS" { return ES3_reserved_ES3_extension_ES3_1_keyword(context, TExtension::ANGLE_texture_multisample, ISAMPLER2DMS); }
"usampler2D" { return ES3_keyword(context, USAMPLER2D); }
"usampler3D" { return ES3_keyword(context, USAMPLER3D); }
"usamplerCube" { return ES3_keyword(context, USAMPLERCUBE); }
"usampler2DArray" { return ES3_keyword(context, USAMPLER2DARRAY); }
"usampler2DMS" { return ES3_reserved_ES3_extension_ES3_1_keyword(context, TExtension::ANGLE_texture_multisample, USAMPLER2DMS); }
"sampler2DShadow" { return ES2_reserved_ES2_extension_ES3_keyword(context, TExtension::EXT_shadow_samplers, SAMPLER2DSHADOW); }
"samplerCubeShadow" { return ES3_keyword(context, SAMPLERCUBESHADOW); }
"sampler2DArrayShadow" { return ES3_keyword(context, SAMPLER2DARRAYSHADOW); }
"__samplerExternal2DY2YEXT" { return ES3_extension(context, TExtension::EXT_YUV_target, SAMPLEREXTERNAL2DY2YEXT); }
"sampler2DMSArray" { return ES3_reserved_ES3_1_extension_ES3_2_keyword(context, TExtension::OES_texture_storage_multisample_2d_array, SAMPLER2DMSARRAY); }
"isampler2DMSArray" { return ES3_reserved_ES3_1_extension_ES3_2_keyword(context, TExtension::OES_texture_storage_multisample_2d_array, ISAMPLER2DMSARRAY); }
"usampler2DMSArray" { return ES3_reserved_ES3_1_extension_ES3_2_keyword(context, TExtension::OES_texture_storage_multisample_2d_array, USAMPLER2DMSARRAY); }
"samplerCubeArray" { return ES3_1_reserved_ES3_1_extension_ES3_2_keyword_2(context, TExtension::OES_texture_cube_map_array, TExtension::EXT_texture_cube_map_array, SAMPLERCUBEARRAYOES, SAMPLERCUBEARRAYEXT); }
"samplerCubeArrayShadow" { return ES3_1_reserved_ES3_1_extension_ES3_2_keyword_2(context, TExtension::OES_texture_cube_map_array, TExtension::EXT_texture_cube_map_array, SAMPLERCUBEARRAYSHADOWOES, SAMPLERCUBEARRAYSHADOWEXT); }
"isamplerCubeArray" { return ES3_1_reserved_ES3_1_extension_ES3_2_keyword_2(context, TExtension::OES_texture_cube_map_array, TExtension::EXT_texture_cube_map_array, ISAMPLERCUBEARRAYOES, ISAMPLERCUBEARRAYEXT); }
"usamplerCubeArray" { return ES3_1_reserved_ES3_1_extension_ES3_2_keyword_2(context, TExtension::OES_texture_cube_map_array, TExtension::EXT_texture_cube_map_array, USAMPLERCUBEARRAYOES, USAMPLERCUBEARRAYEXT); }
"samplerVideoWEBGL" { return WEBGL_video_texture_extension(context, SAMPLERVIDEOWEBGL); }
"struct" { return STRUCT; }
"layout" { return ES3_keyword(context, LAYOUT); }
"yuvCscStandardEXT" { return ES3_extension(context, TExtension::EXT_YUV_target, YUVCSCSTANDARDEXT); }
"itu_601" { return yuvcscstandardext_constant(context); }
"itu_601_full_range" { return yuvcscstandardext_constant(context); }
"itu_709" { return yuvcscstandardext_constant(context); }
"image2D" { return ES3_reserved_ES3_1_keyword(context, IMAGE2D); }
"iimage2D" { return ES3_reserved_ES3_1_keyword(context, IIMAGE2D); }
"uimage2D" { return ES3_reserved_ES3_1_keyword(context, UIMAGE2D); }
"image2DArray" { return ES3_reserved_ES3_1_keyword(context, IMAGE2DARRAY); }
"iimage2DArray" { return ES3_reserved_ES3_1_keyword(context, IIMAGE2DARRAY); }
"uimage2DArray" { return ES3_reserved_ES3_1_keyword(context, UIMAGE2DARRAY); }
"image3D" { return ES3_reserved_ES3_1_keyword(context, IMAGE3D); }
"uimage3D" { return ES3_reserved_ES3_1_keyword(context, UIMAGE3D); }
"iimage3D" { return ES3_reserved_ES3_1_keyword(context, IIMAGE3D); }
"iimageCube" { return ES3_reserved_ES3_1_keyword(context, IIMAGECUBE); }
"uimageCube" { return ES3_reserved_ES3_1_keyword(context, UIMAGECUBE); }
"imageCube" { return ES3_reserved_ES3_1_keyword(context, IMAGECUBE); }
"imageCubeArray" { return ES3_1_reserved_ES3_1_extension_ES3_2_keyword_2(context, TExtension::OES_texture_cube_map_array, TExtension::EXT_texture_cube_map_array, IMAGECUBEARRAYOES, IMAGECUBEARRAYEXT); }
"iimageCubeArray" { return ES3_1_reserved_ES3_1_extension_ES3_2_keyword_2(context, TExtension::OES_texture_cube_map_array, TExtension::EXT_texture_cube_map_array, IIMAGECUBEARRAYOES, IIMAGECUBEARRAYEXT); }
"uimageCubeArray" { return ES3_1_reserved_ES3_1_extension_ES3_2_keyword_2(context, TExtension::OES_texture_cube_map_array, TExtension::EXT_texture_cube_map_array, UIMAGECUBEARRAYOES, UIMAGECUBEARRAYEXT); }
"readonly" { return ES3_reserved_ES3_1_keyword(context, READONLY); }
"writeonly" { return ES3_reserved_ES3_1_keyword(context, WRITEONLY); }
"coherent" { return ES3_reserved_ES3_1_keyword(context, COHERENT); }
"restrict" { return ES3_reserved_ES3_1_keyword(context, RESTRICT); }
"volatile" { return ES2_reserved_ES3_1_keyword(context, VOLATILE); }
"atomic_uint" { return ES3_reserved_ES3_1_keyword(context, ATOMICUINT); }
"precise" { return ES3_1_reserved_ES3_1_extension_ES3_2_keyword(context, TExtension::EXT_gpu_shader5, PRECISE); }
/* Reserved keywords for GLSL ES 3.00 that are not reserved for GLSL ES 1.00 */
"resource" |
"patch" |
"sample" |
"subroutine" |
"common" |
"partition" |
"active" |
"filter" |
"image1D" |
"iimage1D" |
"uimage1D" |
"image1DArray" |
"iimage1DArray" |
"uimage1DArray" |
"image1DShadow" |
"image2DShadow" |
"image1DArrayShadow" |
"image2DArrayShadow" |
"imageBuffer" |
"iimageBuffer" |
"uimageBuffer" |
"sampler1DArray" |
"sampler1DArrayShadow" |
"isampler1D" |
"isampler1DArray" |
"usampler1D" |
"usampler1DArray" |
"isampler2DRect" |
"usampler2DRect" |
"samplerBuffer" |
"isamplerBuffer" |
"usamplerBuffer" {
if (context->getShaderVersion() < 300) {
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
return reserved_word(yyscanner);
}
/* Reserved keywords in GLSL ES 1.00 that are not reserved in GLSL ES 3.00 */
"packed" {
if (context->getShaderVersion() >= 300)
{
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
return reserved_word(yyscanner);
}
/* Reserved keywords */
"asm" |
"class" |
"union" |
"enum" |
"typedef" |
"template" |
"this" |
"goto" |
"inline" |
"noinline" |
"public" |
"static" |
"extern" |
"external" |
"interface" |
"long" |
"short" |
"double" |
"half" |
"fixed" |
"unsigned" |
"superp" |
"input" |
"output" |
"hvec2" |
"hvec3" |
"hvec4" |
"dvec2" |
"dvec3" |
"dvec4" |
"fvec2" |
"fvec3" |
"fvec4" |
"sampler1D" |
"sampler1DShadow" |
"sampler2DRectShadow" |
"sizeof" |
"cast" |
"namespace" |
"using" { return reserved_word(yyscanner); }
{L}({L}|{D})* {
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
0[xX]{H}+ { return int_constant(context); }
0{O}+ { return int_constant(context); }
{D}+ { return int_constant(context); }
0[xX]{H}+[uU] { return uint_constant(context); }
0{O}+[uU] { return uint_constant(context); }
{D}+[uU] { return uint_constant(context); }
{D}+{E} { return float_constant(yyscanner); }
{D}+"."{D}*({E})? { return float_constant(yyscanner); }
"."{D}+({E})? { return float_constant(yyscanner); }
{D}+{E}[fF] { return floatsuffix_check(context); }
{D}+"."{D}*({E})?[fF] { return floatsuffix_check(context); }
"."{D}+({E})?[fF] { return floatsuffix_check(context); }
"+=" { return ADD_ASSIGN; }
"-=" { return SUB_ASSIGN; }
"*=" { return MUL_ASSIGN; }
"/=" { return DIV_ASSIGN; }
"%=" { return MOD_ASSIGN; }
"<<=" { return LEFT_ASSIGN; }
">>=" { return RIGHT_ASSIGN; }
"&=" { return AND_ASSIGN; }
"^=" { return XOR_ASSIGN; }
"|=" { return OR_ASSIGN; }
"++" { return INC_OP; }
"--" { return DEC_OP; }
"&&" { return AND_OP; }
"||" { return OR_OP; }
"^^" { return XOR_OP; }
"<=" { return LE_OP; }
">=" { return GE_OP; }
"==" { return EQ_OP; }
"!=" { return NE_OP; }
"<<" { return LEFT_OP; }
">>" { return RIGHT_OP; }
";" { return SEMICOLON; }
("{"|"<%") { return LEFT_BRACE; }
("}"|"%>") { return RIGHT_BRACE; }
"," { return COMMA; }
":" { return COLON; }
"=" { return EQUAL; }
"(" { return LEFT_PAREN; }
")" { return RIGHT_PAREN; }
("["|"<:") { return LEFT_BRACKET; }
("]"|":>") { return RIGHT_BRACKET; }
"." { BEGIN(FIELDS); return DOT; }
"!" { return BANG; }
"-" { return DASH; }
"~" { return TILDE; }
"+" { return PLUS; }
"*" { return STAR; }
"/" { return SLASH; }
"%" { return PERCENT; }
"<" { return LEFT_ANGLE; }
">" { return RIGHT_ANGLE; }
"|" { return VERTICAL_BAR; }
"^" { return CARET; }
"&" { return AMPERSAND; }
"?" { return QUESTION; }
<FIELDS>{L}({L}|{D})* {
BEGIN(INITIAL);
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return FIELD_SELECTION;
}
<FIELDS>[ \t\v\f\r] {}
<FIELDS>. {
yyextra->error(*yylloc, "Illegal character at fieldname start", yytext);
return 0;
}
[ \t\v\n\f\r] { }
<*><<EOF>> { yyterminate(); }
<*>. { assert(false); return 0; }
%%
yy_size_t string_input(char* buf, yy_size_t max_size, yyscan_t yyscanner) {
angle::pp::Token token;
yyget_extra(yyscanner)->getPreprocessor().lex(&token);
yy_size_t len = token.type == angle::pp::Token::LAST ? 0 : token.text.size();
if (len < max_size)
memcpy(buf, token.text.c_str(), len);
yyset_column(token.location.file, yyscanner);
yyset_lineno(token.location.line, yyscanner);
if (len >= max_size)
YY_FATAL_ERROR("Input buffer overflow");
else if (len > 0)
buf[len++] = ' ';
return len;
}
int check_type(yyscan_t yyscanner) {
struct yyguts_t* yyg = (struct yyguts_t*) yyscanner;
int token = IDENTIFIER;
// Note that the ImmutableString used here isn't static or pool allocated - but it's fine since yytext is valid for the duration of its use.
const TSymbol* symbol = yyextra->symbolTable.find(ImmutableString(yytext, yyleng), yyextra->getShaderVersion());
if (symbol && symbol->isStruct())
{
token = TYPE_NAME;
}
yylval->lex.symbol = symbol;
return token;
}
int reserved_word(yyscan_t yyscanner) {
struct yyguts_t* yyg = (struct yyguts_t*) yyscanner;
yyextra->error(*yylloc, "Illegal use of reserved word", yytext);
return 0;
}
static bool is_extension_enabled_or_is_core(TParseContext *context,
int extension_version, TExtension extension, int promotion_version)
{
int version = context->getShaderVersion();
// If version is at least promotion_version, symbol is definitely keyword. Otherwise it's a
// keyword if version is at least extension_version (where the extension was introduced) and
// the extension is enabled.
return version >= promotion_version ||
(version >= extension_version && context->isExtensionEnabled(extension));
}
int ES2_reserved_ES3_keyword(TParseContext *context, int token)
{
yyscan_t yyscanner = (yyscan_t) context->getScanner();
if (context->getShaderVersion() < 300)
{
return reserved_word(yyscanner);
}
return token;
}
int ES2_keyword_ES3_reserved(TParseContext *context, int token)
{
yyscan_t yyscanner = (yyscan_t) context->getScanner();
if (context->getShaderVersion() >= 300)
{
return reserved_word(yyscanner);
}
return token;
}
int ES3_reserved_ES3_1_keyword(TParseContext *context, int token)
{
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
yyscan_t yyscanner = (yyscan_t) context->getScanner();
if (context->getShaderVersion() < 300)
{
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
else if (context->getShaderVersion() == 300)
{
return reserved_word(yyscanner);
}
return token;
}
int ES3_keyword(TParseContext *context, int token)
{
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
yyscan_t yyscanner = (yyscan_t) context->getScanner();
// not a reserved word in GLSL ES 1.00, so could be used as an identifier/type name
if (context->getShaderVersion() < 300)
{
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
return token;
}
int ES2_reserved_ES3_1_keyword(TParseContext *context, int token)
{
yyscan_t yyscanner = (yyscan_t) context->getScanner();
if (context->getShaderVersion() < 310)
{
return reserved_word(yyscanner);
}
return token;
}
int ES3_1_keyword(TParseContext *context, int token)
{
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
yyscan_t yyscanner = (yyscan_t) context->getScanner();
// A keyword in GLSL ES 3.10.
if (context->getShaderVersion() >= 310)
{
return token;
}
// Otherwise can be used as an identifier/type name
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
int WEBGL_video_texture_extension(TParseContext *context, int token)
{
// Available with WEBGL_video_texture_extension
if (context->isExtensionEnabled(TExtension::WEBGL_video_texture))
{
return token;
}
// Otherwise can be used as an identifier/type name
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
yyscan_t yyscanner = (yyscan_t) context->getScanner();
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
int ES2_reserved_ES2_extension_ES3_keyword(TParseContext *context, TExtension extension, int token)
{
yyscan_t yyscanner = (yyscan_t) context->getScanner();
// A keyword in GLSL ES 3.00 or GLSL ES 1.00 with enabled extension.
if (is_extension_enabled_or_is_core(context, 100, extension, 300))
{
return token;
}
// Reserved otherwise.
return reserved_word(yyscanner);
}
int ES3_extension(TParseContext *context, TExtension extension, int token)
{
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
yyscan_t yyscanner = (yyscan_t) context->getScanner();
// a keyword word in GLSL ES 3.00 with enabled extension.
if (context->getShaderVersion() >= 300 && context->isExtensionEnabled(extension))
{
return token;
}
// Otherwise can be used as an identifier/type name
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
int ES3_reserved_ES3_1_extension_ES3_2_keyword(TParseContext *context, TExtension extension, int token)
{
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
yyscan_t yyscanner = (yyscan_t) context->getScanner();
// a keyword in GLSL ES 3.10 with enabled extension
if (is_extension_enabled_or_is_core(context, 310, extension, 320))
{
return token;
}
// a reserved word in GLSL ES 3.00+
if (context->getShaderVersion() >= 300)
{
return reserved_word(yyscanner);
}
// Otherwise can be used as an identifier/type name
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
int ES3_reserved_ES3_extension(TParseContext *context, TExtension extension, int token)
{
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
yyscan_t yyscanner = (yyscan_t) context->getScanner();
if(context->getShaderVersion() >= 300)
{
if (context->isExtensionEnabled(extension)) {
return token;
} else {
return reserved_word(yyscanner);
}
}
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
int ES3_reserved_ES3_extension_ES3_1_keyword(TParseContext *context, TExtension extension, int token)
{
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
yyscan_t yyscanner = (yyscan_t) context->getScanner();
// A keyword in GLSL ES 3.00 with enabled extension or in GLSL ES 3.10
if (is_extension_enabled_or_is_core(context, 300, extension, 310))
{
return token;
}
if(context->getShaderVersion() == 300)
{
return reserved_word(yyscanner);
}
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
static int ES3_1_reserved_ES3_1_extension_ES3_2_keyword(TParseContext *context, TExtension extension, int token)
{
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
yyscan_t yyscanner = (yyscan_t) context->getScanner();
// A keyword in GLSL ES 3.20 or GLSL ES 3.10 with enabled extension.
if (is_extension_enabled_or_is_core(context, 310, extension, 320))
{
return token;
}
// A reserved word in GLSL ES 3.10
if (context->getShaderVersion() == 310)
{
return reserved_word(yyscanner);
}
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
static int ES3_1_reserved_ES3_1_extension_ES3_2_keyword_2(TParseContext *context, TExtension extension1, TExtension extension2, int token1, int token2)
{
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
yyscan_t yyscanner = (yyscan_t) context->getScanner();
// A keyword in GLSL ES 3.20 or GLSL ES 3.10 with enabled extension.
if (is_extension_enabled_or_is_core(context, 310, extension1, 320))
{
return token1;
}
else if (is_extension_enabled_or_is_core(context, 310, extension2, 320))
{
return token2;
}
// A reserved word in GLSL ES 3.10
if (context->getShaderVersion() == 310)
{
return reserved_word(yyscanner);
}
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
int uint_constant(TParseContext *context)
{
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
if (context->getShaderVersion() < 300)
{
context->error(*yylloc, "Unsigned integers are unsupported prior to GLSL ES 3.00", yytext);
return 0;
}
if (!atoi_clamp(yytext, &(yylval->lex.u)))
yyextra->error(*yylloc, "Integer overflow", yytext);
return UINTCONSTANT;
}
int floatsuffix_check(TParseContext* context)
{
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
if (context->getShaderVersion() < 300)
{
context->error(*yylloc, "Floating-point suffix unsupported prior to GLSL ES 3.00", yytext);
return 0;
}
std::string text = yytext;
text.resize(text.size() - 1);
if (!strtof_clamp(text, &(yylval->lex.f)))
yyextra->warning(*yylloc, "Float overflow", yytext);
return(FLOATCONSTANT);
}
void yyerror(YYLTYPE* lloc, TParseContext* context, void *scanner, const char* reason) {
context->error(*lloc, reason, yyget_text(scanner));
}
int int_constant(TParseContext *context) {
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
unsigned int u;
if (!atoi_clamp(yytext, &u))
{
if (context->getShaderVersion() >= 300)
yyextra->error(*yylloc, "Integer overflow", yytext);
else
yyextra->warning(*yylloc, "Integer overflow", yytext);
}
yylval->lex.i = static_cast<int>(u);
return INTCONSTANT;
}
int float_constant(yyscan_t yyscanner) {
struct yyguts_t* yyg = (struct yyguts_t*) yyscanner;
if (!strtof_clamp(yytext, &(yylval->lex.f)))
yyextra->warning(*yylloc, "Float overflow", yytext);
return FLOATCONSTANT;
}
int yuvcscstandardext_constant(TParseContext *context)
{
struct yyguts_t* yyg = (struct yyguts_t*) context->getScanner();
yyscan_t yyscanner = (yyscan_t) context->getScanner();
// a reserved word in GLSL ES 3.00 with enabled extension, otherwise could be used as an identifier/type name
if (context->getShaderVersion() >= 300 && context->isExtensionEnabled(TExtension::EXT_YUV_target))
{
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return YUVCSCSTANDARDEXTCONSTANT;
}
yylval->lex.string = AllocatePoolCharArray(yytext, yyleng);
return check_type(yyscanner);
}
int glslang_initialize(TParseContext* context) {
yyscan_t scanner = NULL;
if (yylex_init_extra(context, &scanner))
return 1;
context->setScanner(scanner);
return 0;
}
int glslang_finalize(TParseContext* context) {
yyscan_t scanner = context->getScanner();
if (scanner == NULL) return 0;
context->setScanner(NULL);
yylex_destroy(scanner);
return 0;
}
int glslang_scan(size_t count, const char* const string[], const int length[],
TParseContext* context) {
yyrestart(NULL, context->getScanner());
yyset_column(0, context->getScanner());
yyset_lineno(1, context->getScanner());
// Initialize preprocessor.
angle::pp::Preprocessor *preprocessor = &context->getPreprocessor();
if (!preprocessor->init(count, string, length))
return 1;
// Define extension macros.
const TExtensionBehavior& extBehavior = context->extensionBehavior();
for (TExtensionBehavior::const_iterator iter = extBehavior.begin();
iter != extBehavior.end(); ++iter) {
// OVR_multiview should not be defined for WebGL spec'ed shaders.
if (sh::IsWebGLBasedSpec(context->getShaderSpec()) &&
iter->first == TExtension::OVR_multiview) {
continue;
}
preprocessor->predefineMacro(GetExtensionNameString(iter->first), 1);
}
if (context->getFragmentPrecisionHigh())
preprocessor->predefineMacro("GL_FRAGMENT_PRECISION_HIGH", 1);
preprocessor->setMaxTokenSize(sh::GetGlobalMaxTokenSize(context->getShaderSpec()));
return 0;
}