Reworked API Unit test to use run-time DLL loading to avoid apparent issue with missing Vulkan library on appveyor; improved implementation of DLL loading on Windows

1 files changed, 89 insertions, 0 deletions

diff --git a/Graphics/GraphicsEngine/interface/LoadEngineDll.h b/Graphics/GraphicsEngine/interface/LoadEngineDll.h
new file mode 100644
index 00000000..3be64fd5
--- /dev/null
+++ b/Graphics/GraphicsEngine/interface/LoadEngineDll.h
@@ -0,0 +1,89 @@
+/*     Copyright 2019 Diligent Graphics LLC
+ *  
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF ANY PROPRIETARY RIGHTS.
+ *
+ *  In no event and under no legal theory, whether in tort (including negligence), 
+ *  contract, or otherwise, unless required by applicable law (such as deliberate 
+ *  and grossly negligent acts) or agreed to in writing, shall any Contributor be
+ *  liable for any damages, including any direct, indirect, special, incidental, 
+ *  or consequential damages of any character arising as a result of this License or 
+ *  out of the use or inability to use the software (including but not limited to damages 
+ *  for loss of goodwill, work stoppage, computer failure or malfunction, or any and 
+ *  all other commercial damages or losses), even if such Contributor has been advised 
+ *  of the possibility of such damages.
+ */
+
+#pragma once
+
+/// \file
+/// Helper function to load engine DLL on Windows
+
+#include <sstream>
+
+#if PLATFORM_UNIVERSAL_WINDOWS
+#    include "../../../Common/interface/StringTools.h"
+#endif
+
+#ifndef NOMINMAX
+#    define NOMINMAX
+#endif
+#include <Windows.h>
+
+namespace Diligent
+{
+
+inline FARPROC LoadEngineDll(const char* EngineName, const char* GetFactoryFuncName)
+{
+    std::string LibName = EngineName;
+
+#if _WIN64
+    LibName += "_64";
+#else
+    LibName += "_32";
+#endif
+
+#ifdef _DEBUG
+    LibName += "d";
+#else
+    LibName += "r";
+#endif
+
+    LibName += ".dll";
+
+#if PLATFORM_WIN32
+    auto hModule = LoadLibraryA(LibName.c_str());
+#elif PLATFORM_UNIVERSAL_WINDOWS
+    auto hModule = LoadPackagedLibrary(WidenString(LibName).c_str(), 0);
+#else
+#    error Unexpected platform
+#endif
+
+    if (hModule == NULL)
+    {
+        std::stringstream ss;
+        ss << "Failed to load " << LibName << " library.\n";
+        OutputDebugStringA(ss.str().c_str());
+        return NULL;
+    }
+
+    auto GetFactoryFunc = GetProcAddress(hModule, GetFactoryFuncName);
+    if (GetFactoryFunc == NULL)
+    {
+        std::stringstream ss;
+        ss << "Failed to load " << GetFactoryFuncName << " function from " << LibName << " library.\n";
+        OutputDebugStringA(ss.str().c_str());
+        FreeLibrary(hModule);
+    }
+
+    return GetFactoryFunc;
+}
+
+} // namespace Diligent