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Support multiple default versions, to enable ES vs. desktop contexts, for shaders missing a #version statement.

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This also moved some parseContext code from the flex file to the proper C++ file.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@20501 e7fa87d3-cd2b-0410-9028-fcbf551c1848
This commit is contained in:
John Kessenich 2013-02-06 23:06:52 +00:00
parent c435c71d87
commit 46eaf4939e
5 changed files with 79 additions and 64 deletions
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69
glslang/MachineIndependent/ParseHelper.cpp
View File

@ -45,17 +45,82 @@
////////////////////////////////////////////////////////////////////////
TParseContext::TParseContext(TSymbolTable& symt, TIntermediate& interm, EShLanguage L, TInfoSink& is) :
TParseContext::TParseContext(TSymbolTable& symt, TIntermediate& interm, EShLanguage L, TInfoSink& is, int defaultVersion) :
intermediate(interm), symbolTable(symt), infoSink(is), language(L), treeRoot(0),
recoveredFromError(false), numErrors(0), lexAfterType(false), loopNestingLevel(0),
switchNestingLevel(0), inTypeParen(false),
version(110), profile(ENoProfile), futureCompatibility(false),
futureCompatibility(false),
contextPragma(true, false)
{
// Default precisions for version 110, to be overridden for
// other versions/profiles/stage combinations
for (int type = 0; type < EbtNumTypes; ++type)
defaultPrecision[type] = EpqNone;
setVersion(defaultVersion);
setProfile(ENoProfile);
}
void TParseContext::setVersion(int newVersion)
{
version = newVersion;
if (version == 100 || version == 300) {
if (language == EShLangVertex) {
defaultPrecision[EbtInt] = EpqHigh;
defaultPrecision[EbtFloat] = EpqHigh;
defaultPrecision[EbtSampler2D] = EpqLow;
defaultPrecision[EbtSamplerCube] = EpqLow;
}
if (language == EShLangFragment) {
defaultPrecision[EbtInt] = EpqMedium;
defaultPrecision[EbtSampler2D] = EpqLow;
defaultPrecision[EbtSamplerCube] = EpqLow;
}
}
}
// Important assumption: SetVersion() is called before SetProfile(), and is always called
// if there is a version, sending in a ENoProfile if there is no profile given.
void TParseContext::setProfile(EProfile newProfile)
{
const int FirstProfileVersion = 150;
if (newProfile == ENoProfile) {
if (version == 300) {
error(1, "version 300 requires specifying the 'es' profile", "#version", "");
profile = EEsProfile;
} else if (version == 100)
profile = EEsProfile;
else if (version >= FirstProfileVersion)
profile = ECoreProfile;
else
profile = ENoProfile;
} else {
// a profile was provided...
if (version < 150) {
error(1, "versions before 150 do not allow a profile token", "#version", "");
if (version == 100)
profile = EEsProfile;
else
profile = ENoProfile;
} else if (version == 300) {
if (newProfile != EEsProfile)
error(1, "only version 300 supports the es profile", "#version", "");
profile = EEsProfile;
} else {
if (newProfile == EEsProfile) {
error(1, "only version 300 supports the es profile", "#version", "");
if (version >= FirstProfileVersion)
profile = ECoreProfile;
else
profile = ENoProfile;
} else {
// typical desktop case... e.g., "#version 410 core"
profile = newProfile;
}
}
}
}
//

5
glslang/MachineIndependent/ParseHelper.h
View File

@ -67,7 +67,7 @@ struct TPragma {
// they can be passed to the parser without needing a global.
//
struct TParseContext {
TParseContext(TSymbolTable& symt, TIntermediate& interm, EShLanguage L, TInfoSink& is);
TParseContext(TSymbolTable& symt, TIntermediate& interm, EShLanguage L, TInfoSink& is, int defaultVersion);
TIntermediate& intermediate; // to hold and build a parse tree
TSymbolTable& symbolTable; // symbol table that goes with the language currently being parsed
TInfoSink& infoSink;
@ -92,6 +92,9 @@ struct TParseContext {
TString HashErrMsg;
bool AfterEOF;
void setVersion(int);
void setProfile(EProfile);
void initializeExtensionBehavior();
void C_DECL error(TSourceLoc, const char *szReason, const char *szToken,

9
glslang/MachineIndependent/ShaderLang.cpp
View File

@ -190,7 +190,7 @@ bool InitializeSymbolTable(TBuiltInStrings* BuiltInStrings, EShLanguage language
else
symbolTable = &symbolTables[language];
TParseContext parseContext(*symbolTable, intermediate, language, infoSink);
TParseContext parseContext(*symbolTable, intermediate, language, infoSink, 110);
GlobalParseContext = &parseContext;
@ -255,7 +255,8 @@ int ShCompile(
const int numStrings,
const EShOptimizationLevel optLevel,
const TBuiltInResource* resources,
int debugOptions
int debugOptions,
int defaultVersion
)
{
if (!InitThread())
@ -281,9 +282,7 @@ int ShCompile(
GenerateBuiltInSymbolTable(resources, compiler->infoSink, &symbolTable, compiler->getLanguage());
// TODO: this is happening *after* initialization, which already parsed some things... what parse context was that?
// what extensions did it have?
TParseContext parseContext(symbolTable, intermediate, compiler->getLanguage(), compiler->infoSink);
TParseContext parseContext(symbolTable, intermediate, compiler->getLanguage(), compiler->infoSink, defaultVersion);
parseContext.initializeExtensionBehavior();
GlobalParseContext = &parseContext;

57
glslang/MachineIndependent/glslang.l
View File

@ -798,66 +798,13 @@ void ResetTString(void)
void SetVersion(int version)
{
TParseContext& parseContext = *((TParseContext *)cpp->pC);
parseContext.version = version;
if (version == 100 || version == 300) {
if (parseContext.language == EShLangVertex) {
parseContext.defaultPrecision[EbtInt] = EpqHigh;
parseContext.defaultPrecision[EbtFloat] = EpqHigh;
parseContext.defaultPrecision[EbtSampler2D] = EpqLow;
parseContext.defaultPrecision[EbtSamplerCube] = EpqLow;
parseContext.setVersion(version);
}
if (parseContext.language == EShLangFragment) {
parseContext.defaultPrecision[EbtInt] = EpqMedium;
parseContext.defaultPrecision[EbtSampler2D] = EpqLow;
parseContext.defaultPrecision[EbtSamplerCube] = EpqLow;
}
}
}
// Important assumption: SetVersion() is called before SetProfile(), and is always called
// if there is a version, sending in a ENoProfile if there is no profile given.
void SetProfile(EProfile profile)
{
const int FirstProfileVersion = 150;
TParseContext& parseContext = *((TParseContext *)cpp->pC);
if (profile == ENoProfile) {
if (parseContext.version == 300) {
CPPErrorToInfoLog("version 300 requires specifying the 'es' profile");
parseContext.profile = EEsProfile;
} else if (parseContext.version == 100)
parseContext.profile = EEsProfile;
else if (parseContext.version >= FirstProfileVersion)
parseContext.profile = ECoreProfile;
else
parseContext.profile = ENoProfile;
} else {
// a profile was provided...
if (parseContext.version < 150) {
CPPErrorToInfoLog("versions before 150 do not allow a profile token");
if (parseContext.version == 100)
parseContext.profile = EEsProfile;
else
parseContext.profile = ENoProfile;
} else if (parseContext.version == 300) {
if (profile != EEsProfile)
CPPErrorToInfoLog("only version 300 supports the es profile");
parseContext.profile = EEsProfile;
} else {
if (profile == EEsProfile) {
CPPErrorToInfoLog("only version 300 supports the es profile");
if (parseContext.version >= FirstProfileVersion)
parseContext.profile = ECoreProfile;
else
parseContext.profile = ENoProfile;
} else {
// typical desktop case... e.g., "#version 410 core"
parseContext.profile = profile;
}
}
}
parseContext.setProfile(profile);
}
TBehavior GetBehavior(const char* behavior)

3
glslang/Public/ShaderLang.h
View File

@ -154,7 +154,8 @@ SH_IMPORT_EXPORT int ShCompile(
const int numStrings,
const EShOptimizationLevel,
const TBuiltInResource *resources,
int debugOptions
int debugOptions,
int defaultVersion = 110 // use 100 for ES environment
);