HLSL: phase 3c: add option to use Unknown storage format

This uses the Unknown storage format, instead of deducing the
format from the texture declaration type.

glslang/MachineIndependent/ShaderLang.cpp

@@ -1497,6 +1497,7 @@ void TShader::setShiftTextureBinding(unsigned int base) { intermediate->setShift
 void TShader::setShiftUboBinding(unsigned int base)     { intermediate->setShiftUboBinding(base); }
 void TShader::setAutoMapBindings(bool map)              { intermediate->setAutoMapBindings(map); }
 void TShader::setFlattenUniformArrays(bool flatten)     { intermediate->setFlattenUniformArrays(flatten); }
+void TShader::setNoStorageFormat(bool useUnknownFormat) { intermediate->setNoStorageFormat(useUnknownFormat); }
 
 //
 // Turn the shader strings into a parse tree in the TIntermediate.

glslang/MachineIndependent/localintermediate.h

@@ -146,7 +146,8 @@ public:
         shiftTextureBinding(0),
         shiftUboBinding(0),
         autoMapBindings(false),
-        flattenUniformArrays(false)
+        flattenUniformArrays(false),
+        useUnknownFormat(false)
     {
         localSize[0] = 1;
         localSize[1] = 1;
@@ -179,7 +180,9 @@ public:
     bool getAutoMapBindings()             const { return autoMapBindings; }
     void setFlattenUniformArrays(bool flatten)      { flattenUniformArrays = flatten; }
     bool getFlattenUniformArrays()        const { return flattenUniformArrays; }
-
+    void setNoStorageFormat(bool b)             { useUnknownFormat = b; }
+    bool getNoStorageFormat()             const { return useUnknownFormat; }
+    
     void setVersion(int v) { version = v; }
     int getVersion() const { return version; }
     void setProfile(EProfile p) { profile = p; }
@@ -397,6 +400,7 @@ protected:
     unsigned int shiftUboBinding;
     bool autoMapBindings;
     bool flattenUniformArrays;
+    bool useUnknownFormat;
 
     EProfile profile;
     int version;

glslang/Public/ShaderLang.h

@@ -309,6 +309,7 @@ public:
     void setShiftUboBinding(unsigned int base);
     void setAutoMapBindings(bool map);
     void setFlattenUniformArrays(bool flatten);
+    void setNoStorageFormat(bool useUnknownFormat);
 
     // Interface to #include handlers.
     //