Make GrVkBackendContext no longer derive from SkRefCnt.

Also moves the helper Create functions to VkTestUtils since no clients
are using them anymore.

Bug: skia:
Change-Id: I7e8e4912e7ef6fb00a7e2a00407aed5e83211799
Reviewed-on: https://skia-review.googlesource.com/135323
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>

6 files changed, 480 insertions, 107 deletions

diff --git a/tools/gpu/vk/VkTestContext.cpp b/tools/gpu/vk/VkTestContext.cpp
index 25069fe521..592fb0f7b0 100644
--- a/tools/gpu/vk/VkTestContext.cpp
+++ b/tools/gpu/vk/VkTestContext.cpp
@@ -110,21 +110,24 @@ GR_STATIC_ASSERT(sizeof(VkFence) <= sizeof(sk_gpu_test::PlatformFence));
 class VkTestContextImpl : public sk_gpu_test::VkTestContext {
 public:
     static VkTestContext* Create(VkTestContext* sharedContext) {
-        sk_sp<const GrVkBackendContext> backendContext;
+        GrVkBackendContext backendContext;
+        bool ownsContext = true;
         if (sharedContext) {
             backendContext = sharedContext->getVkBackendContext();
+            // We always delete the parent context last so make sure the child does not think they
+            // own the vulkan context.
+            ownsContext = false;
         } else {
             PFN_vkGetInstanceProcAddr instProc;
             PFN_vkGetDeviceProcAddr devProc;
             if (!sk_gpu_test::LoadVkLibraryAndGetProcAddrFuncs(&instProc, &devProc)) {
                 return nullptr;
             }
-            backendContext.reset(GrVkBackendContext::Create(instProc, devProc));
-        }
-        if (!backendContext) {
-            return nullptr;
+            if (!sk_gpu_test::CreateVkBackendContext(instProc, devProc, &backendContext)) {
+                return nullptr;
+            }
         }
-        return new VkTestContextImpl(std::move(backendContext));
+        return new VkTestContextImpl(backendContext, ownsContext);
     }
 
     ~VkTestContextImpl() override { this->teardown(); }
@@ -143,14 +146,19 @@ public:
 protected:
     void teardown() override {
         INHERITED::teardown();
-        fVk.reset(nullptr);
+        fVk.fMemoryAllocator.reset();
+        if (fOwnsContext) {
+            GR_VK_CALL(this->vk(), DeviceWaitIdle(fVk.fDevice));
+            GR_VK_CALL(this->vk(), DestroyDevice(fVk.fDevice, nullptr));
+            GR_VK_CALL(this->vk(), DestroyInstance(fVk.fInstance, nullptr));
+        }
     }
 
 private:
-    VkTestContextImpl(sk_sp<const GrVkBackendContext> backendContext)
-            : VkTestContext(std::move(backendContext)) {
-        fFenceSync.reset(new VkFenceSync(fVk->fInterface, fVk->fDevice, fVk->fQueue,
-                                         fVk->fGraphicsQueueIndex));
+    VkTestContextImpl(const GrVkBackendContext& backendContext, bool ownsContext)
+            : VkTestContext(backendContext, ownsContext) {
+        fFenceSync.reset(new VkFenceSync(fVk.fInterface, fVk.fDevice, fVk.fQueue,
+                                         fVk.fGraphicsQueueIndex));
     }
 
     void onPlatformMakeCurrent() const override {}
diff --git a/tools/gpu/vk/VkTestContext.h b/tools/gpu/vk/VkTestContext.h
index 9fd4170d9d..0e62cc0b8c 100644
--- a/tools/gpu/vk/VkTestContext.h
+++ b/tools/gpu/vk/VkTestContext.h
@@ -19,16 +19,18 @@ class VkTestContext : public TestContext {
 public:
     virtual GrBackend backend() override { return kVulkan_GrBackend; }
 
-    sk_sp<const GrVkBackendContext> getVkBackendContext() {
+    const GrVkBackendContext& getVkBackendContext() {
         return fVk;
     }
 
-    const GrVkInterface* vk() const { return fVk->fInterface.get(); }
+    const GrVkInterface* vk() const { return fVk.fInterface.get(); }
 
 protected:
-    VkTestContext(sk_sp<const GrVkBackendContext> vk) : fVk(std::move(vk)) {}
+    VkTestContext(const GrVkBackendContext& vk, bool ownsContext)
+            : fVk(vk), fOwnsContext(ownsContext) {}
 
-    sk_sp<const GrVkBackendContext> fVk;
+    GrVkBackendContext fVk;
+    bool fOwnsContext;
 
 private:
     typedef TestContext INHERITED;
diff --git a/tools/gpu/vk/VkTestUtils.cpp b/tools/gpu/vk/VkTestUtils.cpp
index c28a42b2c9..927f4fbe82 100644
--- a/tools/gpu/vk/VkTestUtils.cpp
+++ b/tools/gpu/vk/VkTestUtils.cpp
@@ -9,6 +9,9 @@
 
 #ifdef SK_VULKAN
 
+#include "SkAutoMalloc.h"
+#include "vk/GrVkBackendContext.h"
+#include "vk/GrVkExtensions.h"
 #include "../ports/SkOSLibrary.h"
 
 namespace sk_gpu_test {
@@ -46,6 +49,323 @@ bool LoadVkLibraryAndGetProcAddrFuncs(PFN_vkGetInstanceProcAddr* instProc,
     return true;
 #endif
 }
+
+////////////////////////////////////////////////////////////////////////////////
+// Helper code to set up Vulkan context objects
+
+#ifdef SK_ENABLE_VK_LAYERS
+const char* kDebugLayerNames[] = {
+    // elements of VK_LAYER_LUNARG_standard_validation
+    "VK_LAYER_GOOGLE_threading",
+    "VK_LAYER_LUNARG_parameter_validation",
+    "VK_LAYER_LUNARG_object_tracker",
+    "VK_LAYER_LUNARG_image",
+    "VK_LAYER_LUNARG_core_validation",
+    "VK_LAYER_LUNARG_swapchain",
+    "VK_LAYER_GOOGLE_unique_objects",
+    // not included in standard_validation
+    //"VK_LAYER_LUNARG_api_dump",
+    //"VK_LAYER_LUNARG_vktrace",
+    //"VK_LAYER_LUNARG_screenshot",
+};
+#endif
+
+// the minimum version of Vulkan supported
+#ifdef SK_BUILD_FOR_ANDROID
+const uint32_t kGrVkMinimumVersion = VK_MAKE_VERSION(1, 0, 3);
+#else
+const uint32_t kGrVkMinimumVersion = VK_MAKE_VERSION(1, 0, 8);
+#endif
+
+#define ACQUIRE_VK_PROC(name, instance, device)                                \
+    PFN_vk##name grVk##name =                                                  \
+        reinterpret_cast<PFN_vk##name>(getProc("vk" #name, instance, device)); \
+    if (grVk##name == nullptr) {                                               \
+        SkDebugf("Function ptr for vk%s could not be acquired\n", #name);      \
+        return false;                                                          \
+    }
+
+bool CreateVkBackendContext(const GrVkInterface::GetInstanceProc& getInstanceProc,
+                            const GrVkInterface::GetDeviceProc& getDeviceProc,
+                            GrVkBackendContext* ctx,
+                            uint32_t* presentQueueIndexPtr,
+                            CanPresentFn canPresent) {
+    auto getProc = [&getInstanceProc, &getDeviceProc](const char* proc_name,
+                                                      VkInstance instance, VkDevice device) {
+        if (device != VK_NULL_HANDLE) {
+            return getDeviceProc(device, proc_name);
+        }
+        return getInstanceProc(instance, proc_name);
+    };
+
+    VkPhysicalDevice physDev;
+    VkDevice device;
+    VkInstance inst;
+    VkResult err;
+
+    const VkApplicationInfo app_info = {
+        VK_STRUCTURE_TYPE_APPLICATION_INFO, // sType
+        nullptr,                            // pNext
+        "vktest",                           // pApplicationName
+        0,                                  // applicationVersion
+        "vktest",                           // pEngineName
+        0,                                  // engineVerison
+        kGrVkMinimumVersion,                // apiVersion
+    };
+
+    GrVkExtensions extensions(getProc);
+    extensions.initInstance(kGrVkMinimumVersion);
+
+    SkTArray<const char*> instanceLayerNames;
+    SkTArray<const char*> instanceExtensionNames;
+    uint32_t extensionFlags = 0;
+#ifdef SK_ENABLE_VK_LAYERS
+    for (size_t 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;
+    }
+#endif
+
+    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 defined(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 defined(SK_BUILD_FOR_UNIX) && !defined(__Fuchsia__)
+    if (extensions.hasInstanceExtension(VK_KHR_XCB_SURFACE_EXTENSION_NAME)) {
+        instanceExtensionNames.push_back(VK_KHR_XCB_SURFACE_EXTENSION_NAME);
+        extensionFlags |= kKHR_xcb_surface_GrVkExtensionFlag;
+    }
+#endif
+
+    const VkInstanceCreateInfo instance_create = {
+        VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO,    // sType
+        nullptr,                                   // pNext
+        0,                                         // flags
+        &app_info,                                 // pApplicationInfo
+        (uint32_t) instanceLayerNames.count(),     // enabledLayerNameCount
+        instanceLayerNames.begin(),                // ppEnabledLayerNames
+        (uint32_t) instanceExtensionNames.count(), // enabledExtensionNameCount
+        instanceExtensionNames.begin(),            // ppEnabledExtensionNames
+    };
+
+    ACQUIRE_VK_PROC(CreateInstance, VK_NULL_HANDLE, VK_NULL_HANDLE);
+    err = grVkCreateInstance(&instance_create, nullptr, &inst);
+    if (err < 0) {
+        SkDebugf("vkCreateInstance failed: %d\n", err);
+        return false;
+    }
+
+    ACQUIRE_VK_PROC(DestroyInstance, inst, VK_NULL_HANDLE);
+    ACQUIRE_VK_PROC(EnumeratePhysicalDevices, inst, VK_NULL_HANDLE);
+    ACQUIRE_VK_PROC(GetPhysicalDeviceQueueFamilyProperties, inst, VK_NULL_HANDLE);
+    ACQUIRE_VK_PROC(GetPhysicalDeviceFeatures, inst, VK_NULL_HANDLE);
+    ACQUIRE_VK_PROC(CreateDevice, inst, VK_NULL_HANDLE);
+    ACQUIRE_VK_PROC(GetDeviceQueue, inst, VK_NULL_HANDLE);
+    ACQUIRE_VK_PROC(DeviceWaitIdle, inst, VK_NULL_HANDLE);
+    ACQUIRE_VK_PROC(DestroyDevice, inst, VK_NULL_HANDLE);
+
+    uint32_t gpuCount;
+    err = grVkEnumeratePhysicalDevices(inst, &gpuCount, nullptr);
+    if (err) {
+        SkDebugf("vkEnumeratePhysicalDevices failed: %d\n", err);
+        grVkDestroyInstance(inst, nullptr);
+        return false;
+    }
+    if (!gpuCount) {
+        SkDebugf("vkEnumeratePhysicalDevices returned no supported devices.\n");
+        grVkDestroyInstance(inst, nullptr);
+        return false;
+    }
+    // Just returning the first physical device instead of getting the whole array.
+    // TODO: find best match for our needs
+    gpuCount = 1;
+    err = grVkEnumeratePhysicalDevices(inst, &gpuCount, &physDev);
+    // VK_INCOMPLETE is returned when the count we provide is less than the total device count.
+    if (err && VK_INCOMPLETE != err) {
+        SkDebugf("vkEnumeratePhysicalDevices failed: %d\n", err);
+        grVkDestroyInstance(inst, nullptr);
+        return false;
+    }
+
+    // query to get the initial queue props size
+    uint32_t queueCount;
+    grVkGetPhysicalDeviceQueueFamilyProperties(physDev, &queueCount, nullptr);
+    if (!queueCount) {
+        SkDebugf("vkGetPhysicalDeviceQueueFamilyProperties returned no queues.\n");
+        grVkDestroyInstance(inst, nullptr);
+        return false;
+    }
+
+    SkAutoMalloc queuePropsAlloc(queueCount * sizeof(VkQueueFamilyProperties));
+    // now get the actual queue props
+    VkQueueFamilyProperties* queueProps = (VkQueueFamilyProperties*)queuePropsAlloc.get();
+
+    grVkGetPhysicalDeviceQueueFamilyProperties(physDev, &queueCount, queueProps);
+
+    // iterate to find the graphics queue
+    uint32_t graphicsQueueIndex = queueCount;
+    for (uint32_t i = 0; i < queueCount; i++) {
+        if (queueProps[i].queueFlags & VK_QUEUE_GRAPHICS_BIT) {
+            graphicsQueueIndex = i;
+            break;
+        }
+    }
+    if (graphicsQueueIndex == queueCount) {
+        SkDebugf("Could not find any supported graphics queues.\n");
+        grVkDestroyInstance(inst, nullptr);
+        return false;
+    }
+
+    // iterate to find the present queue, if needed
+    uint32_t presentQueueIndex = queueCount;
+    if (presentQueueIndexPtr && canPresent) {
+        for (uint32_t i = 0; i < queueCount; i++) {
+            if (canPresent(inst, physDev, i)) {
+                presentQueueIndex = i;
+                break;
+            }
+        }
+        if (presentQueueIndex == queueCount) {
+            SkDebugf("Could not find any supported present queues.\n");
+            grVkDestroyInstance(inst, nullptr);
+            return false;
+        }
+        *presentQueueIndexPtr = presentQueueIndex;
+    } else {
+        // Just setting this so we end up make a single queue for graphics since there was no
+        // request for a present queue.
+        presentQueueIndex = graphicsQueueIndex;
+    }
+
+    extensions.initDevice(kGrVkMinimumVersion, inst, physDev);
+
+    SkTArray<const char*> deviceLayerNames;
+    SkTArray<const char*> deviceExtensionNames;
+#ifdef SK_ENABLE_VK_LAYERS
+    for (size_t i = 0; i < SK_ARRAY_COUNT(kDebugLayerNames); ++i) {
+        if (extensions.hasDeviceLayer(kDebugLayerNames[i])) {
+            deviceLayerNames.push_back(kDebugLayerNames[i]);
+        }
+    }
+#endif
+    if (extensions.hasDeviceExtension(VK_KHR_SWAPCHAIN_EXTENSION_NAME)) {
+        deviceExtensionNames.push_back(VK_KHR_SWAPCHAIN_EXTENSION_NAME);
+        extensionFlags |= kKHR_swapchain_GrVkExtensionFlag;
+    }
+    if (extensions.hasDeviceExtension("VK_NV_glsl_shader")) {
+        deviceExtensionNames.push_back("VK_NV_glsl_shader");
+        extensionFlags |= kNV_glsl_shader_GrVkExtensionFlag;
+    }
+
+    // query to get the physical device properties
+    VkPhysicalDeviceFeatures deviceFeatures;
+    grVkGetPhysicalDeviceFeatures(physDev, &deviceFeatures);
+    // this looks like it would slow things down,
+    // and we can't depend on it on all platforms
+    deviceFeatures.robustBufferAccess = VK_FALSE;
+
+    uint32_t featureFlags = 0;
+    if (deviceFeatures.geometryShader) {
+        featureFlags |= kGeometryShader_GrVkFeatureFlag;
+    }
+    if (deviceFeatures.dualSrcBlend) {
+        featureFlags |= kDualSrcBlend_GrVkFeatureFlag;
+    }
+    if (deviceFeatures.sampleRateShading) {
+        featureFlags |= kSampleRateShading_GrVkFeatureFlag;
+    }
+
+    float queuePriorities[1] = { 0.0 };
+    // Here we assume no need for swapchain queue
+    // If one is needed, the client will need its own setup code
+    const VkDeviceQueueCreateInfo queueInfo[2] = {
+        {
+            VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO, // sType
+            nullptr,                                    // pNext
+            0,                                          // VkDeviceQueueCreateFlags
+            graphicsQueueIndex,                         // queueFamilyIndex
+            1,                                          // queueCount
+            queuePriorities,                            // pQueuePriorities
+        },
+        {
+            VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO, // sType
+            nullptr,                                    // pNext
+            0,                                          // VkDeviceQueueCreateFlags
+            presentQueueIndex,                          // queueFamilyIndex
+            1,                                          // queueCount
+            queuePriorities,                            // pQueuePriorities
+        }
+    };
+    uint32_t queueInfoCount = (presentQueueIndex != graphicsQueueIndex) ? 2 : 1;
+
+    const VkDeviceCreateInfo deviceInfo = {
+        VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,    // sType
+        nullptr,                                 // pNext
+        0,                                       // VkDeviceCreateFlags
+        queueInfoCount,                          // queueCreateInfoCount
+        queueInfo,                               // pQueueCreateInfos
+        (uint32_t) deviceLayerNames.count(),     // layerCount
+        deviceLayerNames.begin(),                // ppEnabledLayerNames
+        (uint32_t) deviceExtensionNames.count(), // extensionCount
+        deviceExtensionNames.begin(),            // ppEnabledExtensionNames
+        &deviceFeatures                          // ppEnabledFeatures
+    };
+
+    err = grVkCreateDevice(physDev, &deviceInfo, nullptr, &device);
+    if (err) {
+        SkDebugf("CreateDevice failed: %d\n", err);
+        grVkDestroyInstance(inst, nullptr);
+        return false;
+    }
+
+    auto interface =
+        sk_make_sp<GrVkInterface>(getProc, inst, device, extensionFlags);
+    if (!interface->validate(extensionFlags)) {
+        SkDebugf("Vulkan interface validation failed\n");
+        grVkDeviceWaitIdle(device);
+        grVkDestroyDevice(device, nullptr);
+        grVkDestroyInstance(inst, nullptr);
+        return false;
+    }
+
+    VkQueue queue;
+    grVkGetDeviceQueue(device, graphicsQueueIndex, 0, &queue);
+
+    ctx->fInstance = inst;
+    ctx->fPhysicalDevice = physDev;
+    ctx->fDevice = device;
+    ctx->fQueue = queue;
+    ctx->fGraphicsQueueIndex = graphicsQueueIndex;
+    ctx->fMinAPIVersion = kGrVkMinimumVersion;
+    ctx->fExtensions = extensionFlags;
+    ctx->fFeatures = featureFlags;
+    ctx->fInterface.reset(interface.release());
+    ctx->fOwnsInstanceAndDevice = false;
+
+    return true;
+
+
+}
+
 }
 
 #endif
diff --git a/tools/gpu/vk/VkTestUtils.h b/tools/gpu/vk/VkTestUtils.h
index 9f34ef09c5..30471a78c0 100644
--- a/tools/gpu/vk/VkTestUtils.h
+++ b/tools/gpu/vk/VkTestUtils.h
@@ -13,9 +13,21 @@
 #ifdef SK_VULKAN
 
 #include "vk/GrVkDefines.h"
+#include "vk/GrVkInterface.h"
+
+struct GrVkBackendContext;
 
 namespace sk_gpu_test {
     bool LoadVkLibraryAndGetProcAddrFuncs(PFN_vkGetInstanceProcAddr*, PFN_vkGetDeviceProcAddr*);
+
+    using CanPresentFn = std::function<bool(VkInstance, VkPhysicalDevice,
+                                            uint32_t queueFamilyIndex)>;
+
+    bool CreateVkBackendContext(const GrVkInterface::GetInstanceProc& getInstanceProc,
+                                const GrVkInterface::GetDeviceProc& getDeviceProc,
+                                GrVkBackendContext* ctx,
+                                uint32_t* presentQueueIndexPtr = nullptr,
+                                CanPresentFn canPresent = CanPresentFn());
 }
 
 #endif
diff --git a/tools/sk_app/VulkanWindowContext.cpp b/tools/sk_app/VulkanWindowContext.cpp
index ad0e15ca7b..411f114e63 100644
--- a/tools/sk_app/VulkanWindowContext.cpp
+++ b/tools/sk_app/VulkanWindowContext.cpp
@@ -13,7 +13,6 @@
 #include "VulkanWindowContext.h"
 
 #include "vk/GrVkImage.h"
-#include "vk/GrVkInterface.h"
 #include "vk/GrVkUtil.h"
 #include "vk/GrVkTypes.h"
 
@@ -22,8 +21,8 @@
 #undef CreateSemaphore
 #endif
 
-#define GET_PROC(F) f ## F = (PFN_vk ## F) fGetInstanceProcAddr(instance, "vk" #F)
-#define GET_DEV_PROC(F) f ## F = (PFN_vk ## F) fGetDeviceProcAddr(device, "vk" #F)
+#define GET_PROC(F) f ## F = (PFN_vk ## F) fGetInstanceProcAddr(fInstance, "vk" #F)
+#define GET_DEV_PROC(F) f ## F = (PFN_vk ## F) fGetDeviceProcAddr(fDevice, "vk" #F)
 
 namespace sk_app {
 
@@ -49,22 +48,34 @@ VulkanWindowContext::VulkanWindowContext(const DisplayParams& params,
 
 void VulkanWindowContext::initializeContext() {
     // any config code here (particularly for msaa)?
-    fBackendContext.reset(GrVkBackendContext::Create(fGetInstanceProcAddr, fGetDeviceProcAddr,
-                                                     &fPresentQueueIndex, fCanPresentFn));
 
-    if (!(fBackendContext->fExtensions & kKHR_surface_GrVkExtensionFlag) ||
-        !(fBackendContext->fExtensions & kKHR_swapchain_GrVkExtensionFlag)) {
-        fBackendContext.reset(nullptr);
+    GrVkBackendContext backendContext;
+    if (!sk_gpu_test::CreateVkBackendContext(fGetInstanceProcAddr, fGetDeviceProcAddr,
+                                             &backendContext, &fPresentQueueIndex, fCanPresentFn)) {
         return;
     }
 
-    VkInstance instance = fBackendContext->fInstance;
-    VkDevice device = fBackendContext->fDevice;
+    if (!(backendContext.fExtensions & kKHR_surface_GrVkExtensionFlag) ||
+        !(backendContext.fExtensions & kKHR_swapchain_GrVkExtensionFlag)) {
+        return;
+    }
+
+    fInstance = backendContext.fInstance;
+    fPhysicalDevice = backendContext.fPhysicalDevice;
+    fDevice = backendContext.fDevice;
+    fGraphicsQueueIndex = backendContext.fGraphicsQueueIndex;
+    fGraphicsQueue = backendContext.fQueue;
+    fInterface = backendContext.fInterface;
+
+    GET_PROC(DestroyInstance);
     GET_PROC(DestroySurfaceKHR);
     GET_PROC(GetPhysicalDeviceSurfaceSupportKHR);
     GET_PROC(GetPhysicalDeviceSurfaceCapabilitiesKHR);
     GET_PROC(GetPhysicalDeviceSurfaceFormatsKHR);
     GET_PROC(GetPhysicalDeviceSurfacePresentModesKHR);
+    GET_DEV_PROC(DeviceWaitIdle);
+    GET_DEV_PROC(QueueWaitIdle);
+    GET_DEV_PROC(DestroyDevice);
     GET_DEV_PROC(CreateSwapchainKHR);
     GET_DEV_PROC(DestroySwapchainKHR);
     GET_DEV_PROC(GetSwapchainImagesKHR);
@@ -72,18 +83,17 @@ void VulkanWindowContext::initializeContext() {
     GET_DEV_PROC(QueuePresentKHR);
     GET_DEV_PROC(GetDeviceQueue);
 
-    fContext = GrContext::MakeVulkan(fBackendContext, fDisplayParams.fGrContextOptions);
+    fContext = GrContext::MakeVulkan(backendContext, fDisplayParams.fGrContextOptions);
 
-    fSurface = fCreateVkSurfaceFn(instance);
+    fSurface = fCreateVkSurfaceFn(fInstance);
     if (VK_NULL_HANDLE == fSurface) {
-        fBackendContext.reset(nullptr);
+        this->destroyContext();
         return;
     }
 
     VkBool32 supported;
-    VkResult res = fGetPhysicalDeviceSurfaceSupportKHR(fBackendContext->fPhysicalDevice,
-                                                       fPresentQueueIndex, fSurface,
-                                                       &supported);
+    VkResult res = fGetPhysicalDeviceSurfaceSupportKHR(fPhysicalDevice, fPresentQueueIndex,
+                                                       fSurface, &supported);
     if (VK_SUCCESS != res) {
         this->destroyContext();
         return;
@@ -95,45 +105,44 @@ void VulkanWindowContext::initializeContext() {
     }
 
     // create presentQueue
-    fGetDeviceQueue(fBackendContext->fDevice, fPresentQueueIndex, 0, &fPresentQueue);
+    fGetDeviceQueue(fDevice, fPresentQueueIndex, 0, &fPresentQueue);
 }
 
 bool VulkanWindowContext::createSwapchain(int width, int height,
                                           const DisplayParams& params) {
     // check for capabilities
     VkSurfaceCapabilitiesKHR caps;
-    VkResult res = fGetPhysicalDeviceSurfaceCapabilitiesKHR(fBackendContext->fPhysicalDevice,
-                                                            fSurface, &caps);
+    VkResult res = fGetPhysicalDeviceSurfaceCapabilitiesKHR(fPhysicalDevice, fSurface, &caps);
     if (VK_SUCCESS != res) {
         return false;
     }
 
     uint32_t surfaceFormatCount;
-    res = fGetPhysicalDeviceSurfaceFormatsKHR(fBackendContext->fPhysicalDevice, fSurface,
-                                              &surfaceFormatCount, nullptr);
+    res = fGetPhysicalDeviceSurfaceFormatsKHR(fPhysicalDevice, fSurface, &surfaceFormatCount,
+                                              nullptr);
     if (VK_SUCCESS != res) {
         return false;
     }
 
     SkAutoMalloc surfaceFormatAlloc(surfaceFormatCount * sizeof(VkSurfaceFormatKHR));
     VkSurfaceFormatKHR* surfaceFormats = (VkSurfaceFormatKHR*)surfaceFormatAlloc.get();
-    res = fGetPhysicalDeviceSurfaceFormatsKHR(fBackendContext->fPhysicalDevice, fSurface,
-                                              &surfaceFormatCount, surfaceFormats);
+    res = fGetPhysicalDeviceSurfaceFormatsKHR(fPhysicalDevice, fSurface, &surfaceFormatCount,
+                                              surfaceFormats);
     if (VK_SUCCESS != res) {
         return false;
     }
 
     uint32_t presentModeCount;
-    res = fGetPhysicalDeviceSurfacePresentModesKHR(fBackendContext->fPhysicalDevice, fSurface,
-                                                   &presentModeCount, nullptr);
+    res = fGetPhysicalDeviceSurfacePresentModesKHR(fPhysicalDevice, fSurface, &presentModeCount,
+                                                   nullptr);
     if (VK_SUCCESS != res) {
         return false;
     }
 
     SkAutoMalloc presentModeAlloc(presentModeCount * sizeof(VkPresentModeKHR));
     VkPresentModeKHR* presentModes = (VkPresentModeKHR*)presentModeAlloc.get();
-    res = fGetPhysicalDeviceSurfacePresentModesKHR(fBackendContext->fPhysicalDevice, fSurface,
-                                                   &presentModeCount, presentModes);
+    res = fGetPhysicalDeviceSurfacePresentModesKHR(fPhysicalDevice, fSurface, &presentModeCount,
+                                                   presentModes);
     if (VK_SUCCESS != res) {
         return false;
     }
@@ -234,8 +243,8 @@ bool VulkanWindowContext::createSwapchain(int width, int height,
     swapchainCreateInfo.imageArrayLayers = 1;
     swapchainCreateInfo.imageUsage = usageFlags;
 
-    uint32_t queueFamilies[] = { fBackendContext->fGraphicsQueueIndex, fPresentQueueIndex };
-    if (fBackendContext->fGraphicsQueueIndex != fPresentQueueIndex) {
+    uint32_t queueFamilies[] = { fGraphicsQueueIndex, fPresentQueueIndex };
+    if (fGraphicsQueueIndex != fPresentQueueIndex) {
         swapchainCreateInfo.imageSharingMode = VK_SHARING_MODE_CONCURRENT;
         swapchainCreateInfo.queueFamilyIndexCount = 2;
         swapchainCreateInfo.pQueueFamilyIndices = queueFamilies;
@@ -251,18 +260,18 @@ bool VulkanWindowContext::createSwapchain(int width, int height,
     swapchainCreateInfo.clipped = true;
     swapchainCreateInfo.oldSwapchain = fSwapchain;
 
-    res = fCreateSwapchainKHR(fBackendContext->fDevice, &swapchainCreateInfo, nullptr, &fSwapchain);
+    res = fCreateSwapchainKHR(fDevice, &swapchainCreateInfo, nullptr, &fSwapchain);
     if (VK_SUCCESS != res) {
         return false;
     }
 
     // destroy the old swapchain
     if (swapchainCreateInfo.oldSwapchain != VK_NULL_HANDLE) {
-        GR_VK_CALL(fBackendContext->fInterface, DeviceWaitIdle(fBackendContext->fDevice));
+        fDeviceWaitIdle(fDevice);
 
         this->destroyBuffers();
 
-        fDestroySwapchainKHR(fBackendContext->fDevice, swapchainCreateInfo.oldSwapchain, nullptr);
+        fDestroySwapchainKHR(fDevice, swapchainCreateInfo.oldSwapchain, nullptr);
     }
 
     this->createBuffers(swapchainCreateInfo.imageFormat, colorType);
@@ -271,10 +280,10 @@ bool VulkanWindowContext::createSwapchain(int width, int height,
 }
 
 void VulkanWindowContext::createBuffers(VkFormat format, SkColorType colorType) {
-    fGetSwapchainImagesKHR(fBackendContext->fDevice, fSwapchain, &fImageCount, nullptr);
+    fGetSwapchainImagesKHR(fDevice, fSwapchain, &fImageCount, nullptr);
     SkASSERT(fImageCount);
     fImages = new VkImage[fImageCount];
-    fGetSwapchainImagesKHR(fBackendContext->fDevice, fSwapchain, &fImageCount, fImages);
+    fGetSwapchainImagesKHR(fDevice, fSwapchain, &fImageCount, fImages);
 
     // set up initial image layouts and create surfaces
     fImageLayouts = new VkImageLayout[fImageCount];
@@ -306,10 +315,10 @@ void VulkanWindowContext::createBuffers(VkFormat format, SkColorType colorType)
         memset(&commandPoolInfo, 0, sizeof(VkCommandPoolCreateInfo));
         commandPoolInfo.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
         // this needs to be on the render queue
-        commandPoolInfo.queueFamilyIndex = fBackendContext->fGraphicsQueueIndex;
+        commandPoolInfo.queueFamilyIndex = fGraphicsQueueIndex;
         commandPoolInfo.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
-        GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
-                            CreateCommandPool(fBackendContext->fDevice, &commandPoolInfo,
+        GR_VK_CALL_ERRCHECK(fInterface,
+                            CreateCommandPool(fDevice, &commandPoolInfo,
                                               nullptr, &fCommandPool));
     }
 
@@ -337,20 +346,20 @@ void VulkanWindowContext::createBuffers(VkFormat format, SkColorType colorType)
     fBackbuffers = new BackbufferInfo[fImageCount + 1];
     for (uint32_t i = 0; i < fImageCount + 1; ++i) {
         fBackbuffers[i].fImageIndex = -1;
-        GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
-                            CreateSemaphore(fBackendContext->fDevice, &semaphoreInfo,
+        GR_VK_CALL_ERRCHECK(fInterface,
+                            CreateSemaphore(fDevice, &semaphoreInfo,
                                             nullptr, &fBackbuffers[i].fAcquireSemaphore));
-        GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
-                            CreateSemaphore(fBackendContext->fDevice, &semaphoreInfo,
+        GR_VK_CALL_ERRCHECK(fInterface,
+                            CreateSemaphore(fDevice, &semaphoreInfo,
                                             nullptr, &fBackbuffers[i].fRenderSemaphore));
-        GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
-                            AllocateCommandBuffers(fBackendContext->fDevice, &commandBuffersInfo,
+        GR_VK_CALL_ERRCHECK(fInterface,
+                            AllocateCommandBuffers(fDevice, &commandBuffersInfo,
                                                    fBackbuffers[i].fTransitionCmdBuffers));
-        GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
-                            CreateFence(fBackendContext->fDevice, &fenceInfo, nullptr,
+        GR_VK_CALL_ERRCHECK(fInterface,
+                            CreateFence(fDevice, &fenceInfo, nullptr,
                                         &fBackbuffers[i].fUsageFences[0]));
-        GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
-                            CreateFence(fBackendContext->fDevice, &fenceInfo, nullptr,
+        GR_VK_CALL_ERRCHECK(fInterface,
+                            CreateFence(fDevice, &fenceInfo, nullptr,
                                         &fBackbuffers[i].fUsageFences[1]));
     }
     fCurrentBackbufferIndex = fImageCount;
@@ -360,26 +369,26 @@ void VulkanWindowContext::destroyBuffers() {
 
     if (fBackbuffers) {
         for (uint32_t i = 0; i < fImageCount + 1; ++i) {
-            GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
-                                WaitForFences(fBackendContext->fDevice, 2,
+            GR_VK_CALL_ERRCHECK(fInterface,
+                                WaitForFences(fDevice, 2,
                                               fBackbuffers[i].fUsageFences,
                                               true, UINT64_MAX));
             fBackbuffers[i].fImageIndex = -1;
-            GR_VK_CALL(fBackendContext->fInterface,
-                       DestroySemaphore(fBackendContext->fDevice,
+            GR_VK_CALL(fInterface,
+                       DestroySemaphore(fDevice,
                                         fBackbuffers[i].fAcquireSemaphore,
                                         nullptr));
-            GR_VK_CALL(fBackendContext->fInterface,
-                       DestroySemaphore(fBackendContext->fDevice,
+            GR_VK_CALL(fInterface,
+                       DestroySemaphore(fDevice,
                                         fBackbuffers[i].fRenderSemaphore,
                                         nullptr));
-            GR_VK_CALL(fBackendContext->fInterface,
-                       FreeCommandBuffers(fBackendContext->fDevice, fCommandPool, 2,
+            GR_VK_CALL(fInterface,
+                       FreeCommandBuffers(fDevice, fCommandPool, 2,
                                           fBackbuffers[i].fTransitionCmdBuffers));
-            GR_VK_CALL(fBackendContext->fInterface,
-                       DestroyFence(fBackendContext->fDevice, fBackbuffers[i].fUsageFences[0], 0));
-            GR_VK_CALL(fBackendContext->fInterface,
-                       DestroyFence(fBackendContext->fDevice, fBackbuffers[i].fUsageFences[1], 0));
+            GR_VK_CALL(fInterface,
+                       DestroyFence(fDevice, fBackbuffers[i].fUsageFences[0], 0));
+            GR_VK_CALL(fInterface,
+                       DestroyFence(fDevice, fBackbuffers[i].fUsageFences[1], 0));
         }
     }
 
@@ -400,34 +409,43 @@ VulkanWindowContext::~VulkanWindowContext() {
 }
 
 void VulkanWindowContext::destroyContext() {
-    if (!fBackendContext.get()) {
+    if (!this->isValid()) {
         return;
     }
 
-    GR_VK_CALL(fBackendContext->fInterface, QueueWaitIdle(fPresentQueue));
-    GR_VK_CALL(fBackendContext->fInterface, DeviceWaitIdle(fBackendContext->fDevice));
+    fQueueWaitIdle(fPresentQueue);
+    fDeviceWaitIdle(fDevice);
 
     this->destroyBuffers();
 
     if (VK_NULL_HANDLE != fCommandPool) {
-        GR_VK_CALL(fBackendContext->fInterface, DestroyCommandPool(fBackendContext->fDevice,
-                                                                   fCommandPool, nullptr));
+        GR_VK_CALL(fInterface, DestroyCommandPool(fDevice, fCommandPool, nullptr));
         fCommandPool = VK_NULL_HANDLE;
     }
 
     if (VK_NULL_HANDLE != fSwapchain) {
-        fDestroySwapchainKHR(fBackendContext->fDevice, fSwapchain, nullptr);
+        fDestroySwapchainKHR(fDevice, fSwapchain, nullptr);
         fSwapchain = VK_NULL_HANDLE;
     }
 
     if (VK_NULL_HANDLE != fSurface) {
-        fDestroySurfaceKHR(fBackendContext->fInstance, fSurface, nullptr);
+        fDestroySurfaceKHR(fInstance, fSurface, nullptr);
         fSurface = VK_NULL_HANDLE;
     }
 
     fContext.reset();
+    fInterface.reset();
+
+    if (VK_NULL_HANDLE != fDevice) {
+        fDestroyDevice(fDevice, nullptr);
+        fDevice = VK_NULL_HANDLE;
+    }
+    fPhysicalDevice = VK_NULL_HANDLE;
 
-    fBackendContext.reset(nullptr);
+    if (VK_NULL_HANDLE != fInstance) {
+        fDestroyInstance(fInstance, nullptr);
+        fInstance = VK_NULL_HANDLE;
+    }
 }
 
 VulkanWindowContext::BackbufferInfo* VulkanWindowContext::getAvailableBackbuffer() {
@@ -439,8 +457,8 @@ VulkanWindowContext::BackbufferInfo* VulkanWindowContext::getAvailableBackbuffer
     }
 
     BackbufferInfo* backbuffer = fBackbuffers + fCurrentBackbufferIndex;
-    GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
-                        WaitForFences(fBackendContext->fDevice, 2, backbuffer->fUsageFences,
+    GR_VK_CALL_ERRCHECK(fInterface,
+                        WaitForFences(fDevice, 2, backbuffer->fUsageFences,
                                       true, UINT64_MAX));
     return backbuffer;
 }
@@ -450,12 +468,12 @@ sk_sp<SkSurface> VulkanWindowContext::getBackbufferSurface() {
     SkASSERT(backbuffer);
 
     // reset the fence
-    GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
-                        ResetFences(fBackendContext->fDevice, 2, backbuffer->fUsageFences));
+    GR_VK_CALL_ERRCHECK(fInterface,
+                        ResetFences(fDevice, 2, backbuffer->fUsageFences));
     // semaphores should be in unsignaled state
 
     // acquire the image
-    VkResult res = fAcquireNextImageKHR(fBackendContext->fDevice, fSwapchain, UINT64_MAX,
+    VkResult res = fAcquireNextImageKHR(fDevice, fSwapchain, UINT64_MAX,
                                         backbuffer->fAcquireSemaphore, VK_NULL_HANDLE,
                                         &backbuffer->fImageIndex);
     if (VK_ERROR_SURFACE_LOST_KHR == res) {
@@ -469,11 +487,11 @@ sk_sp<SkSurface> VulkanWindowContext::getBackbufferSurface() {
             return nullptr;
         }
         backbuffer = this->getAvailableBackbuffer();
-        GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
-                            ResetFences(fBackendContext->fDevice, 2, backbuffer->fUsageFences));
+        GR_VK_CALL_ERRCHECK(fInterface,
+                            ResetFences(fDevice, 2, backbuffer->fUsageFences));
 
         // acquire the image
-        res = fAcquireNextImageKHR(fBackendContext->fDevice, fSwapchain, UINT64_MAX,
+        res = fAcquireNextImageKHR(fDevice, fSwapchain, UINT64_MAX,
                                    backbuffer->fAcquireSemaphore, VK_NULL_HANDLE,
                                    &backbuffer->fImageIndex);
 
@@ -501,27 +519,27 @@ sk_sp<SkSurface> VulkanWindowContext::getBackbufferSurface() {
         layout,                                   // oldLayout
         VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL, // newLayout
         fPresentQueueIndex,                       // srcQueueFamilyIndex
-        fBackendContext->fGraphicsQueueIndex,     // dstQueueFamilyIndex
+        fGraphicsQueueIndex,                      // dstQueueFamilyIndex
         fImages[backbuffer->fImageIndex],         // image
         { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 } // subresourceRange
     };
-    GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+    GR_VK_CALL_ERRCHECK(fInterface,
                         ResetCommandBuffer(backbuffer->fTransitionCmdBuffers[0], 0));
     VkCommandBufferBeginInfo info;
     memset(&info, 0, sizeof(VkCommandBufferBeginInfo));
     info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
     info.flags = 0;
-    GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+    GR_VK_CALL_ERRCHECK(fInterface,
                         BeginCommandBuffer(backbuffer->fTransitionCmdBuffers[0], &info));
 
-    GR_VK_CALL(fBackendContext->fInterface,
+    GR_VK_CALL(fInterface,
                CmdPipelineBarrier(backbuffer->fTransitionCmdBuffers[0],
                                   srcStageMask, dstStageMask, 0,
                                   0, nullptr,
                                   0, nullptr,
                                   1, &imageMemoryBarrier));
 
-    GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+    GR_VK_CALL_ERRCHECK(fInterface,
                         EndCommandBuffer(backbuffer->fTransitionCmdBuffers[0]));
 
     VkPipelineStageFlags waitDstStageFlags = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
@@ -536,8 +554,8 @@ sk_sp<SkSurface> VulkanWindowContext::getBackbufferSurface() {
     submitInfo.pCommandBuffers = &backbuffer->fTransitionCmdBuffers[0];
     submitInfo.signalSemaphoreCount = 0;
 
-    GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
-                        QueueSubmit(fBackendContext->fQueue, 1, &submitInfo,
+    GR_VK_CALL_ERRCHECK(fInterface,
+                        QueueSubmit(fGraphicsQueue, 1, &submitInfo,
                                     backbuffer->fUsageFences[0]));
 
     SkSurface* surface = fSurfaces[backbuffer->fImageIndex].get();
@@ -574,26 +592,26 @@ void VulkanWindowContext::swapBuffers() {
         dstAccessMask,                            // inputMask
         layout,                                   // oldLayout
         VK_IMAGE_LAYOUT_PRESENT_SRC_KHR,          // newLayout
-        fBackendContext->fGraphicsQueueIndex,     // srcQueueFamilyIndex
+        fGraphicsQueueIndex,                      // srcQueueFamilyIndex
         fPresentQueueIndex,                       // dstQueueFamilyIndex
         fImages[backbuffer->fImageIndex],         // image
         { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 } // subresourceRange
     };
-    GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+    GR_VK_CALL_ERRCHECK(fInterface,
                         ResetCommandBuffer(backbuffer->fTransitionCmdBuffers[1], 0));
     VkCommandBufferBeginInfo info;
     memset(&info, 0, sizeof(VkCommandBufferBeginInfo));
     info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
     info.flags = 0;
-    GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+    GR_VK_CALL_ERRCHECK(fInterface,
                         BeginCommandBuffer(backbuffer->fTransitionCmdBuffers[1], &info));
-    GR_VK_CALL(fBackendContext->fInterface,
+    GR_VK_CALL(fInterface,
                CmdPipelineBarrier(backbuffer->fTransitionCmdBuffers[1],
                                   srcStageMask, dstStageMask, 0,
                                   0, nullptr,
                                   0, nullptr,
                                   1, &imageMemoryBarrier));
-    GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
+    GR_VK_CALL_ERRCHECK(fInterface,
                         EndCommandBuffer(backbuffer->fTransitionCmdBuffers[1]));
 
     fImageLayouts[backbuffer->fImageIndex] = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
@@ -609,8 +627,8 @@ void VulkanWindowContext::swapBuffers() {
     submitInfo.signalSemaphoreCount = 1;
     submitInfo.pSignalSemaphores = &backbuffer->fRenderSemaphore;
 
-    GR_VK_CALL_ERRCHECK(fBackendContext->fInterface,
-                        QueueSubmit(fBackendContext->fQueue, 1, &submitInfo,
+    GR_VK_CALL_ERRCHECK(fInterface,
+                        QueueSubmit(fGraphicsQueue, 1, &submitInfo,
                                     backbuffer->fUsageFences[1]));
 
     // Submit present operation to present queue
diff --git a/tools/sk_app/VulkanWindowContext.h b/tools/sk_app/VulkanWindowContext.h
index 1fca9dc83e..79298f6b38 100644
--- a/tools/sk_app/VulkanWindowContext.h
+++ b/tools/sk_app/VulkanWindowContext.h
@@ -13,6 +13,8 @@
 #ifdef SK_VULKAN
 
 #include "vk/GrVkBackendContext.h"
+#include "vk/GrVkInterface.h"
+#include "vk/VkTestUtils.h"
 #include "WindowContext.h"
 
 class GrRenderTarget;
@@ -26,7 +28,7 @@ public:
     sk_sp<SkSurface> getBackbufferSurface() override;
     void swapBuffers() override;
 
-    bool isValid() override { return SkToBool(fBackendContext.get()); }
+    bool isValid() override { return fDevice != VK_NULL_HANDLE; }
 
     void resize(int w, int h) override {
         this->createSwapchain(w, h, fDisplayParams);
@@ -41,7 +43,7 @@ public:
     /** Platform specific function that creates a VkSurfaceKHR for a window */
     using CreateVkSurfaceFn = std::function<VkSurfaceKHR(VkInstance)>;
     /** Platform specific function that determines whether presentation will succeed. */
-    using CanPresentFn = GrVkBackendContext::CanPresentFn;
+    using CanPresentFn = sk_gpu_test::CanPresentFn;
 
     VulkanWindowContext(const DisplayParams&, CreateVkSurfaceFn, CanPresentFn,
                         PFN_vkGetInstanceProcAddr, PFN_vkGetDeviceProcAddr);
@@ -63,7 +65,9 @@ private:
     void createBuffers(VkFormat format, SkColorType colorType);
     void destroyBuffers();
 
-    sk_sp<const GrVkBackendContext> fBackendContext;
+    VkInstance fInstance = VK_NULL_HANDLE;
+    VkPhysicalDevice fPhysicalDevice = VK_NULL_HANDLE;
+    VkDevice fDevice = VK_NULL_HANDLE;
 
     // simple wrapper class that exists only to initialize a pointer to NULL
     template <typename FNPTR_TYPE> class VkPtr {
@@ -95,10 +99,19 @@ private:
     VkPtr<PFN_vkGetSwapchainImagesKHR> fGetSwapchainImagesKHR;
     VkPtr<PFN_vkAcquireNextImageKHR> fAcquireNextImageKHR;
     VkPtr<PFN_vkQueuePresentKHR> fQueuePresentKHR;
+
+    VkPtr<PFN_vkDestroyInstance> fDestroyInstance;
+    VkPtr<PFN_vkDeviceWaitIdle> fDeviceWaitIdle;
+    VkPtr<PFN_vkQueueWaitIdle> fQueueWaitIdle;
+    VkPtr<PFN_vkDestroyDevice> fDestroyDevice;
     VkPtr<PFN_vkGetDeviceQueue> fGetDeviceQueue;
 
+    sk_sp<const GrVkInterface> fInterface;
+
     VkSurfaceKHR      fSurface;
     VkSwapchainKHR    fSwapchain;
+    uint32_t          fGraphicsQueueIndex;
+    VkQueue           fGraphicsQueue;
     uint32_t          fPresentQueueIndex;
     VkQueue           fPresentQueue;