First pass at VulkanViewer

tools/vulkan/win/VulkanTestContext_win.cpp

Index: tools/vulkan/win/VulkanTestContext_win.cpp
diff --git a/tools/vulkan/win/VulkanTestContext_win.cpp b/tools/vulkan/win/VulkanTestContext_win.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a4f49e3a209617ee6ea17906708a7feb2a5c2db8
--- /dev/null
+++ b/tools/vulkan/win/VulkanTestContext_win.cpp
@@ -0,0 +1,47 @@
+
+/*
+ * 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 "VulkanTestContext_win.h"
+
+#include "vk/GrVkInterface.h"
+#include "../../src/gpu/vk/GrVkUtil.h"
+
+// Platform dependant call
+VkSurfaceKHR VulkanTestContext::createVkSurface(void* platformData) {
+    // need better error handling here
+    SkASSERT(platformData);
+    ContextPlatformData_win* winPlatformData = 
+                                           reinterpret_cast<ContextPlatformData_win*>(platformData);
+    VkSurfaceKHR surface;
+
+    VkWin32SurfaceCreateInfoKHR surfaceCreateInfo;
+    memset(&surfaceCreateInfo, 0, sizeof(VkWin32SurfaceCreateInfoKHR));
+    surfaceCreateInfo.sType = VK_STRUCTURE_TYPE_WIN32_SURFACE_CREATE_INFO_KHR;
+    surfaceCreateInfo.pNext = nullptr;
+    surfaceCreateInfo.flags = 0;
+    surfaceCreateInfo.hinstance = winPlatformData->fHInstance;
+    surfaceCreateInfo.hwnd = winPlatformData->fHWnd;
+
+    VkResult res = GR_VK_CALL(fBackendContext->fInterface,
+                              CreateWin32SurfaceKHR(fBackendContext->fInstance, &surfaceCreateInfo,
+                              nullptr, &surface));
+    if (VK_SUCCESS != res) {
+        return VK_NULL_HANDLE;
+    }
+
+    return surface;
+}
+
+// Platform dependant call
+bool VulkanTestContext::canPresent(uint32_t queueFamilyIndex) {
+    VkBool32 check = GR_VK_CALL(fBackendContext->fInterface,
+                                GetPhysicalDeviceWin32PresentationSupportKHR(
+                                                                   fBackendContext->fPhysicalDevice,
+                                                                   queueFamilyIndex));
+    return (VK_FALSE != check);
+}