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Support a uniform block to hold global uniform variables.

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Used initially just by HLSL, for $Global.  Could be an option
for GLSL -> Vulkan.
This commit is contained in:
John Kessenich 2016-09-27 19:13:05 -06:00
parent e82061de08
commit 6dbc0a7a33
6 changed files with 117 additions and 40 deletions
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18
glslang/MachineIndependent/ParseHelper.h
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@ -78,7 +78,8 @@ public:
TInfoSink& infoSink, bool forwardCompatible, EShMessages messages)
: TParseVersions(interm, version, profile, spvVersion, language, infoSink, forwardCompatible, messages),
symbolTable(symbolTable),
linkage(nullptr), scanContext(nullptr), ppContext(nullptr) { }
linkage(nullptr), scanContext(nullptr), ppContext(nullptr),
globalUniformBlock(nullptr) { }
virtual ~TParseContextBase() { }
virtual void setLimits(const TBuiltInResource&) = 0;
@ -126,6 +127,13 @@ public:
TSymbolTable& symbolTable; // symbol table that goes with the current language, version, and profile
// Manage the global uniform block (default uniforms in GLSL, $Global in HLSL)
// TODO: This could perhaps get its own object, but the current design doesn't work
// yet when new uniform variables are declared between function definitions, so
// this is pending getting a fully functional design.
virtual void growGlobalUniformBlock(TSourceLoc&, TType&, TString& memberName);
virtual bool insertGlobalUniformBlock();
protected:
TParseContextBase(TParseContextBase&);
TParseContextBase& operator=(TParseContextBase&);
@ -147,6 +155,14 @@ protected:
std::function<bool(const TType&, const TType&)>,
std::function<bool(const TType&, const TType&, const TType&)>,
/* output */ bool& tie);
// Manage the global uniform block (default uniforms in GLSL, $Global in HLSL)
TVariable* globalUniformBlock; // the actual block, inserted into the symbol table
bool globalUniformBlockAdded; // true once inserted into the symbol table
bool globalUniformBlockChanged; // true if members have changed
// override this to set the language-specific name
virtual const char* getGlobalUniformBlockName() { return ""; }
virtual void finalizeGlobalUniformBlockLayout(TVariable&) { }
};
//