Add API for querying TypeLayout from a Type

Added two API functions:
1. `spReflection_FindTypeByName`, which returns a DeclRefType to the struct type with the given name. The function finds from all loaded modules in a `CompileRequest` for a decl with the given name, construct a `Type` object and cache it in `CompileRequest::types` dictionary. The subsequent calls to `spReflection_FindTypeByName` with the same name will simply returned the cached Type objects.
2. `spReflection_GetTypeLayout`, which returns a `TypeLayout` for a given `Type`. This function creates and caches the `TypeLayout` in the `TargetRequest` object that is used to create the `ProgramLayout`.

1 files changed, 9 insertions, 0 deletions

diff --git a/slang.h b/slang.h
index f7d49354a..3d7484075 100644
--- a/slang.h
+++ b/slang.h
@@ -633,6 +633,12 @@ extern "C"
         SLANG_STAGE_PIXEL = SLANG_STAGE_FRAGMENT,
     };
 
+    typedef SlangUInt32 SlangLayoutRules;
+    enum
+    {
+        SLANG_LAYOUT_RULES_DEFAULT,
+    };
+
     // Type Reflection
 
     SLANG_API SlangTypeKind spReflectionType_GetKind(SlangReflectionType* type);
@@ -739,6 +745,9 @@ extern "C"
     SLANG_API SlangReflectionTypeParameter* spReflection_GetTypeParameterByIndex(SlangReflection* reflection, unsigned int index);
     SLANG_API SlangReflectionTypeParameter* spReflection_FindTypeParameter(SlangReflection* reflection, char const* name);
 
+    SLANG_API SlangReflectionType* spReflection_FindTypeByName(SlangReflection* reflection, char const* name);
+    SLANG_API SlangReflectionTypeLayout* spReflection_GetTypeLayout(SlangReflection* reflection, SlangReflectionType* reflectionType, SlangLayoutRules rules);
+
     SLANG_API SlangUInt spReflection_getEntryPointCount(SlangReflection* reflection);
 
     SLANG_API SlangReflectionEntryPoint* spReflection_getEntryPointByIndex(SlangReflection* reflection, SlangUInt index);