IDataBlob: added template versions of GetDataPtr and GetConstDataPtr methods

Author: TheMostDiligent

Graphics/GraphicsEngineOpenGL/src/ShaderGLImpl.cpp

@@ -321,7 +321,7 @@ bool ShaderGLImpl::GetCompileStatus(IDataBlob** ppCompilerOutput, bool ThrowOnEr
                 // InfoLogLen accounts for null terminator
                 auto pOutputDataBlob = DataBlobImpl::Create(InfoLogLen + m_GLSLSourceString.length() + 1);
 
-                char* DataPtr = static_cast<char*>(pOutputDataBlob->GetDataPtr());
+                char* DataPtr = pOutputDataBlob->GetDataPtr<char>();
                 if (!InfoLog.empty())
                 {
                     // Copy info log including null terminator

Graphics/HLSL2GLSLConverterLib/src/HLSL2GLSLConverterImpl.cpp

@@ -798,8 +798,8 @@ void HLSL2GLSLConverterImpl::ConversionStream::InsertIncludes(String& GLSLSource
                 pIncludeDataStream->ReadBlob(pIncludeData);
 
                 // Get include text
-                auto   IncludeText = reinterpret_cast<const Char*>(pIncludeData->GetDataPtr());
-                size_t NumSymbols  = pIncludeData->GetSize();
+                const Char* IncludeText = pIncludeData->GetConstDataPtr<Char>();
+                size_t      NumSymbols  = pIncludeData->GetSize();
 
                 // Insert the text into source
                 GLSLSource.insert(IncludeStartPos - GLSLSource.begin(), IncludeText, NumSymbols);

Graphics/ShaderTools/include/HLSLUtils.hpp

@@ -59,7 +59,7 @@ void HandleHLSLCompilerResult(bool               CompilationSucceeded,
         const auto ShaderSourceLen = ShaderSource.length();
         auto       pOutputLogBlob  = DataBlobImpl::Create(ShaderSourceLen + 1 + CompilerMsgLen + 1);
 
-        auto* log = static_cast<char*>(pOutputLogBlob->GetDataPtr());
+        char* log = pOutputLogBlob->GetDataPtr<char>();
 
         if (CompilerMsg != nullptr)
             memcpy(log, CompilerMsg, CompilerMsgLen);

Graphics/ShaderTools/src/GLSLangUtils.cpp

@@ -247,7 +247,7 @@ void LogCompilerError(const char* DebugOutputMessage,
     if (ppCompilerOutput != nullptr)
     {
         auto  pOutputDataBlob = DataBlobImpl::Create(SourceCodeLen + 1 + ErrorLog.length() + 1);
-        char* DataPtr         = reinterpret_cast<char*>(pOutputDataBlob->GetDataPtr());
+        char* DataPtr         = pOutputDataBlob->GetDataPtr<char>();
         memcpy(DataPtr, ErrorLog.data(), ErrorLog.length() + 1);
         memcpy(DataPtr + ErrorLog.length() + 1, ShaderSource, SourceCodeLen + 1);
         pOutputDataBlob->QueryInterface(IID_DataBlob, reinterpret_cast<IObject**>(ppCompilerOutput));
@@ -321,7 +321,7 @@ class IncluderImpl : public ::glslang::TShader::Includer
         auto* pNewInclude =
             new IncludeResult{
                 headerName,
-                reinterpret_cast<const char*>(pFileData->GetDataPtr()),
+                pFileData->GetConstDataPtr<char>(),
                 pFileData->GetSize(),
                 nullptr};
 

Graphics/ShaderTools/src/ShaderToolsCommon.cpp

@@ -244,7 +244,7 @@ ShaderSourceFileData ReadShaderSourceFile(const char*                      Sourc
 
                 SourceData.pFileData = DataBlobImpl::Create();
                 pSourceStream->ReadBlob(SourceData.pFileData);
-                SourceData.Source       = reinterpret_cast<char*>(SourceData.pFileData->GetDataPtr());
+                SourceData.Source       = SourceData.pFileData->GetConstDataPtr<char>();
                 SourceData.SourceLength = StaticCast<Uint32>(SourceData.pFileData->GetSize());
             }
             else

Graphics/ShaderTools/src/WGSLShaderResources.cpp

@@ -761,7 +761,7 @@ WGSLShaderResources::WGSLShaderResources(IMemoryAllocator&      Allocator,
     {
         RefCntAutoPtr<DataBlobImpl> pOutputDataBlob = DataBlobImpl::Create(WGSL.length() + 1 + Diagnostics.length() + 1);
 
-        char* DataPtr = reinterpret_cast<char*>(pOutputDataBlob->GetDataPtr());
+        char* DataPtr = pOutputDataBlob->GetDataPtr<char>();
         memcpy(DataPtr, Diagnostics.data(), Diagnostics.length() + 1);
         memcpy(DataPtr + Diagnostics.length() + 1, WGSL.data(), WGSL.length() + 1);
         pOutputDataBlob->QueryInterface(IID_DataBlob, reinterpret_cast<IObject**>(ppTintOutput));

Primitives/interface/DataBlob.h

@@ -65,6 +65,20 @@ DILIGENT_BEGIN_INTERFACE(IDataBlob, IObject)
     /// Returns const pointer to the internal data buffer
     VIRTUAL const void* METHOD(GetConstDataPtr)(THIS_
                                                 size_t Offset DEFAULT_VALUE(0)) CONST PURE;
+
+#if DILIGENT_CPP_INTERFACE
+    template <typename T>
+    T* GetDataPtr(size_t Offset = 0)
+    {
+        return static_cast<T*>(GetDataPtr(Offset));
+    }
+
+    template <typename T>
+    const T* GetConstDataPtr(size_t Offset = 0) const
+    {
+        return static_cast<const T*>(GetConstDataPtr(Offset));
+    }
+#endif
 };
 DILIGENT_END_INTERFACE
 

Tests/DiligentCoreAPITest/src/BrokenShaderTest.cpp

@@ -126,7 +126,7 @@ void TestBrokenShader(const char*            Source,
         ASSERT_NE(pErrors, nullptr);
     }
     ASSERT_NE(pErrors, nullptr);
-    const char* Msg = reinterpret_cast<const char*>(pErrors->GetDataPtr());
+    const char* Msg = pErrors->GetConstDataPtr<char>();
     LOG_INFO_MESSAGE("Compiler output:\n", Msg);
 }