Pure Texture to Sampled Texture Transform

Adds a transformation step to the post processing step.
Two modes are available:
1) keep
- Keeps samplers, textures and sampled textures as is
2) transform pure texture into sampled texture and remove pure samplers
- removes all pure samplers
- transforms all pure textures into its sampled counter part

Change-Id: If54972e8052961db66c23f4b7e719d363cf6edbd

glslang/Public/ShaderLang.h

@@ -134,6 +134,14 @@ typedef enum {
     EShOptFull,         // Optimizations that will take more time
 } EShOptimizationLevel;
 
+//
+// Texture and Sampler transformation mode.
+//
+typedef enum {
+    EShTexSampTransKeep,   // keep textures and samplers as is (default)
+    EShTexSampTransUpgradeTextureRemoveSampler,  // change texture w/o embeded sampler into sampled texture and throw away all samplers
+} EShTextureSamplerTransformMode;
+
 //
 // Message choices for what errors and warnings are given.
 //
@@ -313,6 +321,7 @@ public:
     void setHlslIoMapping(bool hlslIoMap);
     void setFlattenUniformArrays(bool flatten);
     void setNoStorageFormat(bool useUnknownFormat);
+    void setTextureSamplerTransformMode(EShTextureSamplerTransformMode mode);
 
     // Interface to #include handlers.
     //