feat: add shader compiler for IW4

src/ObjCompiling/Techset/ShaderIncludeHandler.cpp

@@ -0,0 +1,59 @@
+#include "ShaderIncludeHandler.h"
+
+#include "Shader/ShaderCommon.h"
+#include "Utils/Logging/Log.h"
+
+#include <iostream>
+#include <utility>
+
+#ifdef _WIN32
+
+namespace techset
+{
+    ShaderIncludeHandler::ShaderIncludeHandler(ISearchPath& searchPath)
+        : m_search_path(searchPath)
+    {
+    }
+
+    HRESULT ShaderIncludeHandler::Open(D3D_INCLUDE_TYPE includeType, const LPCSTR pFileName, LPCVOID pParentData, LPCVOID* ppData, UINT* pBytes)
+    {
+        const auto fileName = shader::GetSourceFileNameForShaderAssetName(pFileName);
+        auto file = m_search_path.Open(fileName);
+        if (!file.IsOpen() || file.m_length <= 0)
+            return E_FAIL;
+
+        if (std::cmp_greater(file.m_length, MAX_SHADER_SIZE))
+        {
+            con::error("Invalid shader source \"{}\": File too big: {}\n", pFileName, file.m_length);
+            return E_FAIL;
+        }
+
+        const auto shaderSize = static_cast<size_t>(file.m_length);
+        auto shaderData = std::make_unique<char[]>(shaderSize);
+        file.m_stream->read(shaderData.get(), shaderSize);
+        file.m_stream.reset();
+
+        *ppData = shaderData.get();
+        *pBytes = shaderSize;
+
+        m_file_buffers_in_use.push_back(std::move(shaderData));
+
+        return S_OK;
+    }
+
+    HRESULT ShaderIncludeHandler::Close(const LPCVOID pData)
+    {
+        for (auto i = m_file_buffers_in_use.begin(); i != m_file_buffers_in_use.end(); ++i)
+        {
+            if (i->get() == pData)
+            {
+                m_file_buffers_in_use.erase(i);
+                return S_OK;
+            }
+        }
+
+        return E_FAIL;
+    }
+} // namespace techset
+
+#endif