Add support for creating Vulkan window surfaces.

extlibs/headers/vulkan/vk_sdk_platform.h

@@ -0,0 +1,69 @@
+//
+// File: vk_sdk_platform.h
+//
+/*
+ * Copyright (c) 2015-2016 The Khronos Group Inc.
+ * Copyright (c) 2015-2016 Valve Corporation
+ * Copyright (c) 2015-2016 LunarG, Inc.
+ *
+ * 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef VK_SDK_PLATFORM_H
+#define VK_SDK_PLATFORM_H
+
+#if defined(_WIN32)
+#define NOMINMAX
+#ifndef __cplusplus
+#undef inline
+#define inline __inline
+#endif // __cplusplus
+
+#if (defined(_MSC_VER) && _MSC_VER < 1900 /*vs2015*/)
+// C99:
+// Microsoft didn't implement C99 in Visual Studio; but started adding it with
+// VS2013.  However, VS2013 still didn't have snprintf().  The following is a
+// work-around (Note: The _CRT_SECURE_NO_WARNINGS macro must be set in the
+// "CMakeLists.txt" file).
+// NOTE: This is fixed in Visual Studio 2015.
+#define snprintf _snprintf
+#endif
+
+#define strdup _strdup
+
+#endif // _WIN32
+
+// Check for noexcept support using clang, with fallback to Windows or GCC version numbers
+#ifndef NOEXCEPT
+#if defined(__clang__)
+#if __has_feature(cxx_noexcept)
+#define HAS_NOEXCEPT
+#endif
+#else
+#if defined(__GXX_EXPERIMENTAL_CXX0X__) && __GNUC__ * 10 + __GNUC_MINOR__ >= 46
+#define HAS_NOEXCEPT
+#else
+#if defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 190023026 && defined(_HAS_EXCEPTIONS) && _HAS_EXCEPTIONS
+#define HAS_NOEXCEPT
+#endif
+#endif
+#endif
+
+#ifdef HAS_NOEXCEPT
+#define NOEXCEPT noexcept
+#else
+#define NOEXCEPT
+#endif
+#endif
+
+#endif  // VK_SDK_PLATFORM_H