Build for a Windows 8.1 minimum (#564)

Auxiliary/DirectXTexEXR.cpp

@@ -240,19 +240,10 @@ HRESULT DirectX::GetMetadataFromEXRFile(const wchar_t* szFile, TexMetadata& meta
         }
     }
 
-#if (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
     ScopedHandle hFile(safe_handle(CreateFile2(
         szFile,
         GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING,
         nullptr)));
-#else
-    ScopedHandle hFile(safe_handle(CreateFileW(
-        szFile,
-        GENERIC_READ, FILE_SHARE_READ,
-        nullptr,
-        OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN,
-        nullptr)));
-#endif
     if (!hFile)
     {
         return HRESULT_FROM_WIN32(GetLastError());
@@ -358,19 +349,10 @@ HRESULT DirectX::LoadFromEXRFile(const wchar_t* szFile, TexMetadata* metadata, S
         }
     }
 
-#if (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
     ScopedHandle hFile(safe_handle(CreateFile2(
         szFile,
         GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING,
         nullptr)));
-#else
-    ScopedHandle hFile(safe_handle(CreateFileW(
-        szFile,
-        GENERIC_READ, FILE_SHARE_READ,
-        nullptr,
-        OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN,
-        nullptr)));
-#endif
     if (!hFile)
     {
         return HRESULT_FROM_WIN32(GetLastError());
@@ -508,19 +490,12 @@ HRESULT DirectX::SaveToEXRFile(const Image& image, const wchar_t* szFile)
     }
 
     // Create file and write header
-#if (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
-    ScopedHandle hFile(safe_handle(CreateFile2(
-        szFile,
-        GENERIC_WRITE, 0, CREATE_ALWAYS,
-        nullptr)));
-#else
     ScopedHandle hFile(safe_handle(CreateFileW(
         szFile,
         GENERIC_WRITE, 0,
         nullptr,
         CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,
         nullptr)));
-#endif
     if (!hFile)
     {
         return HRESULT_FROM_WIN32(GetLastError());

Auxiliary/DirectXTexXboxDDS.cpp

@@ -439,12 +439,10 @@ HRESULT Xbox::GetMetadataFromDDSFileEx(
 
     isXbox = false;
 
-#if (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
-    ScopedHandle hFile(safe_handle(CreateFile2(szFile, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING, nullptr)));
-#else
-    ScopedHandle hFile(safe_handle(CreateFileW(szFile, GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING,
-        FILE_FLAG_SEQUENTIAL_SCAN, nullptr)));
-#endif
+    ScopedHandle hFile(safe_handle(CreateFile2(
+        szFile,
+        GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING,
+        nullptr)));
     if (!hFile)
     {
         return HRESULT_FROM_WIN32(GetLastError());
@@ -591,13 +589,10 @@ HRESULT Xbox::LoadFromDDSFileEx(
 
     xbox.Release();
 
-#if (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
-    ScopedHandle hFile(safe_handle(CreateFile2(szFile, GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING, nullptr)));
-#else
-    ScopedHandle hFile(safe_handle(CreateFileW(szFile, GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING,
-        FILE_FLAG_SEQUENTIAL_SCAN, nullptr)));
-#endif
-
+    ScopedHandle hFile(safe_handle(CreateFile2(
+        szFile,
+        GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING,
+        nullptr)));
     if (!hFile)
     {
         return HRESULT_FROM_WIN32(GetLastError());
@@ -742,13 +737,10 @@ HRESULT Xbox::SaveToDDSFile(const XboxImage& xbox, const wchar_t* szFile)
         return hr;
 
     // Create file and write header
-#if (_WIN32_WINNT >= _WIN32_WINNT_WIN8)
-    ScopedHandle hFile(safe_handle(CreateFile2(szFile,
-        GENERIC_WRITE, 0, CREATE_ALWAYS, nullptr)));
-#else
-    ScopedHandle hFile(safe_handle(CreateFileW(szFile,
-        GENERIC_WRITE, 0, nullptr, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, nullptr)));
-#endif
+    ScopedHandle hFile(safe_handle(CreateFile2(
+        szFile,
+        GENERIC_WRITE, 0, CREATE_ALWAYS,
+        nullptr)));
     if (!hFile)
     {
         return HRESULT_FROM_WIN32(GetLastError());