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

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

glslang/MachineIndependent/ParseHelper.cpp

@@ -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;
+            }
+        }
+    }
 }
 
 //

glslang/MachineIndependent/ParseHelper.h

@@ -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,

glslang/MachineIndependent/ShaderLang.cpp

@@ -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?
+    TParseContext parseContext(symbolTable, intermediate, compiler->getLanguage(), compiler->infoSink, defaultVersion);
-    // what extensions did it have?
-    TParseContext parseContext(symbolTable, intermediate, compiler->getLanguage(), compiler->infoSink);
     parseContext.initializeExtensionBehavior();
 
     GlobalParseContext = &parseContext;

glslang/MachineIndependent/glslang.l

@@ -798,66 +798,13 @@ void ResetTString(void)
 void SetVersion(int version)
 {
     TParseContext& parseContext = *((TParseContext *)cpp->pC);
-    parseContext.version = version;
+    parseContext.setVersion(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;
 }
 
-        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);
-
+    parseContext.setProfile(profile);
-    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;
-            }
-        }
-    }
 }
 
 TBehavior GetBehavior(const char* behavior)

glslang/Public/ShaderLang.h

@@ -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
     );