vulkan: Include a copy of vulkan.h and vk_platform.h.

Now we can provide Vulkan support in the build even if the build box doesn't
have a Vulkan SDK, since we dynamically link to the library anyhow.

--HG--
extra : rebase_source : f4972489a15b276f65ea65c077172fdcbbe3420a

src/video/SDL_vulkan_internal.h

@@ -59,7 +59,7 @@
  * inclusion of vulkan has the appropriate USE_PLATFORM defined, hence
  * the above. */
 #define VK_NO_PROTOTYPES
-#include "vulkan/vulkan.h"
+#include "./khronos/vulkan/vulkan.h"
 
 extern const char *SDL_Vulkan_GetResultString(VkResult result);
 

src/video/cocoa/SDL_cocoametalview.m

@@ -26,9 +26,6 @@
  * how to add a CAMetalLayer backed view.
  */
 
-/* this is (currently) only used with Vulkan. Remove this #if when that changes! */
-#if SDL_VIDEO_VULKAN_SURFACE && SDL_VIDEO_DRIVER_COCOA
-
 #import "SDL_cocoametalview.h"
 
 #include "SDL_assert.h"
@@ -118,7 +115,5 @@ Cocoa_Mtl_GetDrawableSize(SDL_Window * window, int * w, int * h)
     }
 }
 
-#endif
-
 /* vi: set ts=4 sw=4 expandtab: */
 

src/video/khronos/vulkan/vk_platform.h

@@ -0,0 +1,120 @@
+//
+// File: vk_platform.h
+//
+/*
+** Copyright (c) 2014-2017 The Khronos Group 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_PLATFORM_H_
+#define VK_PLATFORM_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif // __cplusplus
+
+/*
+***************************************************************************************************
+*   Platform-specific directives and type declarations
+***************************************************************************************************
+*/
+
+/* Platform-specific calling convention macros.
+ *
+ * Platforms should define these so that Vulkan clients call Vulkan commands
+ * with the same calling conventions that the Vulkan implementation expects.
+ *
+ * VKAPI_ATTR - Placed before the return type in function declarations.
+ *              Useful for C++11 and GCC/Clang-style function attribute syntax.
+ * VKAPI_CALL - Placed after the return type in function declarations.
+ *              Useful for MSVC-style calling convention syntax.
+ * VKAPI_PTR  - Placed between the '(' and '*' in function pointer types.
+ *
+ * Function declaration:  VKAPI_ATTR void VKAPI_CALL vkCommand(void);
+ * Function pointer type: typedef void (VKAPI_PTR *PFN_vkCommand)(void);
+ */
+#if defined(_WIN32)
+    // On Windows, Vulkan commands use the stdcall convention
+    #define VKAPI_ATTR
+    #define VKAPI_CALL __stdcall
+    #define VKAPI_PTR  VKAPI_CALL
+#elif defined(__ANDROID__) && defined(__ARM_ARCH) && __ARM_ARCH < 7
+    #error "Vulkan isn't supported for the 'armeabi' NDK ABI"
+#elif defined(__ANDROID__) && defined(__ARM_ARCH) && __ARM_ARCH >= 7 && defined(__ARM_32BIT_STATE)
+    // On Android 32-bit ARM targets, Vulkan functions use the "hardfloat"
+    // calling convention, i.e. float parameters are passed in registers. This
+    // is true even if the rest of the application passes floats on the stack,
+    // as it does by default when compiling for the armeabi-v7a NDK ABI.
+    #define VKAPI_ATTR __attribute__((pcs("aapcs-vfp")))
+    #define VKAPI_CALL
+    #define VKAPI_PTR  VKAPI_ATTR
+#else
+    // On other platforms, use the default calling convention
+    #define VKAPI_ATTR
+    #define VKAPI_CALL
+    #define VKAPI_PTR
+#endif
+
+#include <stddef.h>
+
+#if !defined(VK_NO_STDINT_H)
+    #if defined(_MSC_VER) && (_MSC_VER < 1600)
+        typedef signed   __int8  int8_t;
+        typedef unsigned __int8  uint8_t;
+        typedef signed   __int16 int16_t;
+        typedef unsigned __int16 uint16_t;
+        typedef signed   __int32 int32_t;
+        typedef unsigned __int32 uint32_t;
+        typedef signed   __int64 int64_t;
+        typedef unsigned __int64 uint64_t;
+    #else
+        #include <stdint.h>
+    #endif
+#endif // !defined(VK_NO_STDINT_H)
+
+#ifdef __cplusplus
+} // extern "C"
+#endif // __cplusplus
+
+// Platform-specific headers required by platform window system extensions.
+// These are enabled prior to #including "vulkan.h". The same enable then
+// controls inclusion of the extension interfaces in vulkan.h.
+
+#ifdef VK_USE_PLATFORM_ANDROID_KHR
+#include <android/native_window.h>
+#endif
+
+#ifdef VK_USE_PLATFORM_MIR_KHR
+#include <mir_toolkit/client_types.h>
+#endif
+
+#ifdef VK_USE_PLATFORM_WAYLAND_KHR
+#include <wayland-client.h>
+#endif
+
+#ifdef VK_USE_PLATFORM_WIN32_KHR
+#include <windows.h>
+#endif
+
+#ifdef VK_USE_PLATFORM_XLIB_KHR
+#include <X11/Xlib.h>
+#endif
+
+#ifdef VK_USE_PLATFORM_XCB_KHR
+#include <xcb/xcb.h>
+#endif
+
+#endif