Add WSI functions to GrVkInterface

src/gpu/vk/GrVkBackendContext.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "vk/GrVkBackendContext.h"
 #include "vk/GrVkExtensions.h"
 #include "vk/GrVkInterface.h"
@@ skipping 50 matching lines @@
 #ifdef ENABLE_VK_LAYERS
     for (int i = 0; i < SK_ARRAY_COUNT(kDebugLayerNames); ++i) {
         if (extensions.hasInstanceLayer(kDebugLayerNames[i])) {
             instanceLayerNames.push_back(kDebugLayerNames[i]);
         }
     }
     if (extensions.hasInstanceExtension(VK_EXT_DEBUG_REPORT_EXTENSION_NAME)) {
         instanceExtensionNames.push_back(VK_EXT_DEBUG_REPORT_EXTENSION_NAME);
         extensionFlags |= kEXT_debug_report_GrVkExtensionFlag;
     }
+    if (extensions.hasInstanceExtension(VK_KHR_SURFACE_EXTENSION_NAME)) {
+        instanceExtensionNames.push_back(VK_KHR_SURFACE_EXTENSION_NAME);
+        extensionFlags |= kKHR_surface_GrVkExtensionFlag;
+    }
+    if (extensions.hasInstanceExtension(VK_KHR_SWAPCHAIN_EXTENSION_NAME)) {
+        instanceExtensionNames.push_back(VK_KHR_SWAPCHAIN_EXTENSION_NAME);
+        extensionFlags |= kKHR_swapchain_GrVkExtensionFlag;
+    }
+#ifdef SK_BUILD_FOR_WIN
+    if (extensions.hasInstanceExtension(VK_KHR_WIN32_SURFACE_EXTENSION_NAME)) {
+        instanceExtensionNames.push_back(VK_KHR_WIN32_SURFACE_EXTENSION_NAME);
+        extensionFlags |= kKHR_win32_surface_GrVkExtensionFlag;
+    }
+#elif SK_BUILD_FOR_ANDROID
+    if (extensions.hasInstanceExtension(VK_KHR_ANDROID_SURFACE_EXTENSION_NAME)) {
+        instanceExtensionNames.push_back(VK_KHR_ANDROID_SURFACE_EXTENSION_NAME);
+        extensionFlags |= kKHR_android_surface_GrVkExtensionFlag;
+}
+#elif SK_BUILD_FOR_UNIX
+    if (extensions.hasInstanceExtension(VK_KHR_XLIB_SURFACE_EXTENSION_NAME)) {
+        instanceExtensionNames.push_back(VK_KHR_XLIB_SURFACE_EXTENSION_NAME);
+        extensionFlags |= kKHR_xlib_surface_GrVkExtensionFlag;
+    }
+#endif
 #endif
 
     const VkInstanceCreateInfo instance_create = {
         VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO, // sType
         nullptr,                                // pNext
         0,                                      // flags
         &app_info,                              // pApplicationInfo
         instanceLayerNames.count(),             // enabledLayerNameCount
         instanceLayerNames.begin(),             // ppEnabledLayerNames
         instanceExtensionNames.count(),         // enabledExtensionNameCount
@@ skipping 123 matching lines @@
   
     return ctx;
 }
 
 GrVkBackendContext::~GrVkBackendContext() {
     vkDestroyDevice(fDevice, nullptr);
     fDevice = VK_NULL_HANDLE;
     vkDestroyInstance(fInstance, nullptr);
     fInstance = VK_NULL_HANDLE;
 }