Revert "Reland "Make GrVkBackendContext no longer derive from SkRefCnt.""

This reverts commit 0db3a8846a4d05d55c36b7fa95fa6fbc1a6639cd.

Reason for revert: fuchsia change reverted

Original change's description:
> Reland "Make GrVkBackendContext no longer derive from SkRefCnt."
> 
> This reverts commit 059a9ab4bcd07a4bfdbfef333c27ef3d277e0e46.
> 
> Reason for revert: Fix landed in Fuchsia
> 
> Original change's description:
> > Revert "Make GrVkBackendContext no longer derive from SkRefCnt."
> > 
> > This reverts commit 93ae2337732bf206e6ef4faecc6b30c3881e8359.
> > 
> > Reason for revert: <INSERT REASONING HERE>
> > 
> > Original change's description:
> > > 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>
> > 
> > TBR=egdaniel@google.com,jvanverth@google.com,bsalomon@google.com
> > 
> > # Not skipping CQ checks because original CL landed > 1 day ago.
> > 
> > Bug: skia:
> > Change-Id: If7201917631dc22753ea3fa6e9d2984463e38e4c
> > Reviewed-on: https://skia-review.googlesource.com/137903
> > Reviewed-by: Greg Daniel <egdaniel@google.com>
> > Commit-Queue: Greg Daniel <egdaniel@google.com>
> 
> TBR=egdaniel@google.com,jvanverth@google.com,bsalomon@google.com
> 
> # Not skipping CQ checks because original CL landed > 1 day ago.
> 
> Bug: skia:
> Change-Id: Ia4b7c0bb2c7b5dba809d85c69f0b41b473140526
> Reviewed-on: https://skia-review.googlesource.com/138181
> Reviewed-by: Greg Daniel <egdaniel@google.com>
> Commit-Queue: Greg Daniel <egdaniel@google.com>

TBR=egdaniel@google.com,jvanverth@google.com,bsalomon@google.com

Change-Id: I3f7bc4a5e4e09512fe165303685c123ec3527e58
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/138422
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>

3 files changed, 378 insertions, 49 deletions

diff --git a/src/gpu/vk/GrVkBackendContext.cpp b/src/gpu/vk/GrVkBackendContext.cpp
new file mode 100644
index 0000000000..3c4e8d7a60
--- /dev/null
+++ b/src/gpu/vk/GrVkBackendContext.cpp
@@ -0,0 +1,338 @@
+/*
+ * 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 "SkAutoMalloc.h"
+#include "vk/GrVkBackendContext.h"
+#include "vk/GrVkExtensions.h"
+#include "vk/GrVkUtil.h"
+
+#if GR_TEST_UTILS || defined(SK_BUILD_FOR_ANDROID_FRAMEWORK)
+
+////////////////////////////////////////////////////////////////////////////////
+// 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 nullptr;                                                        \
+    }
+
+// Create the base Vulkan objects needed by the GrVkGpu object
+const GrVkBackendContext* GrVkBackendContext::Create(uint32_t* presentQueueIndexPtr,
+                                                     CanPresentFn canPresent,
+                                                     GrVkInterface::GetProc getProc) {
+    if (!getProc) {
+        return nullptr;
+    }
+    SkASSERT(getProc);
+
+    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 nullptr;
+    }
+
+    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 nullptr;
+    }
+    if (!gpuCount) {
+        SkDebugf("vkEnumeratePhysicalDevices returned no supported devices.\n");
+        grVkDestroyInstance(inst, nullptr);
+        return nullptr;
+    }
+    // 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 nullptr;
+    }
+
+    // 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 nullptr;
+    }
+
+    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 nullptr;
+    }
+
+    // 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 nullptr;
+        }
+        *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 nullptr;
+    }
+
+    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 nullptr;
+    }
+
+    VkQueue queue;
+    grVkGetDeviceQueue(device, graphicsQueueIndex, 0, &queue);
+
+    GrVkBackendContext* ctx = new GrVkBackendContext();
+    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 = true;
+
+    return ctx;
+}
+#endif // GR_TEST_UTILS || defined(SK_BUILD_FOR_ANDROID_FRAMEWORK)
+
+GrVkBackendContext::~GrVkBackendContext() {
+    fMemoryAllocator.reset();
+    if (fInterface == nullptr || !fOwnsInstanceAndDevice) {
+        return;
+    }
+
+    fInterface->fFunctions.fDeviceWaitIdle(fDevice);
+    fInterface->fFunctions.fDestroyDevice(fDevice, nullptr);
+    fDevice = VK_NULL_HANDLE;
+    fInterface->fFunctions.fDestroyInstance(fInstance, nullptr);
+    fInstance = VK_NULL_HANDLE;
+}
diff --git a/src/gpu/vk/GrVkGpu.cpp b/src/gpu/vk/GrVkGpu.cpp
index 0b160a6ade..ba1f7caf2d 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -73,38 +73,33 @@ VKAPI_ATTR VkBool32 VKAPI_CALL DebugReportCallback(
 }
 #endif
 
-sk_sp<GrGpu> GrVkGpu::Make(const GrVkBackendContext& backendContext,
+sk_sp<GrGpu> GrVkGpu::Make(sk_sp<const GrVkBackendContext> backendContext,
                            const GrContextOptions& options, GrContext* context) {
-    if (backendContext.fInstance == VK_NULL_HANDLE ||
-        backendContext.fPhysicalDevice == VK_NULL_HANDLE ||
-        backendContext.fDevice == VK_NULL_HANDLE ||
-        backendContext.fQueue == VK_NULL_HANDLE) {
+    if (!backendContext) {
         return nullptr;
     }
-    if (!backendContext.fInterface ||
-        !backendContext.fInterface->validate(backendContext.fExtensions)) {
+
+    if (!backendContext->fInterface->validate(backendContext->fExtensions)) {
         return nullptr;
     }
 
-    return sk_sp<GrGpu>(new GrVkGpu(context, options, backendContext));
+    return sk_sp<GrGpu>(new GrVkGpu(context, options, std::move(backendContext)));
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
 GrVkGpu::GrVkGpu(GrContext* context, const GrContextOptions& options,
-                 const GrVkBackendContext& backendContext)
+                 sk_sp<const GrVkBackendContext> backendCtx)
         : INHERITED(context)
-        , fInterface(std::move(backendContext.fInterface))
-        , fMemoryAllocator(backendContext.fMemoryAllocator)
-        , fInstance(backendContext.fInstance)
-        , fDevice(backendContext.fDevice)
-        , fQueue(backendContext.fQueue)
+        , fBackendContext(std::move(backendCtx))
+        , fMemoryAllocator(fBackendContext->fMemoryAllocator)
+        , fDevice(fBackendContext->fDevice)
+        , fQueue(fBackendContext->fQueue)
         , fResourceProvider(this)
         , fDisconnected(false) {
-    SkASSERT(!backendContext.fOwnsInstanceAndDevice);
 #ifdef SK_ENABLE_VK_LAYERS
     fCallback = VK_NULL_HANDLE;
-    if (backendContext.fExtensions & kEXT_debug_report_GrVkExtensionFlag) {
+    if (fBackendContext->fExtensions & kEXT_debug_report_GrVkExtensionFlag) {
         // Setup callback creation information
         VkDebugReportCallbackCreateInfoEXT callbackCreateInfo;
         callbackCreateInfo.sType = VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT;
@@ -119,32 +114,32 @@ GrVkGpu::GrVkGpu(GrContext* context, const GrContextOptions& options,
 
         // Register the callback
         GR_VK_CALL_ERRCHECK(this->vkInterface(),
-                            CreateDebugReportCallbackEXT(backendContext.fInstance,
+                            CreateDebugReportCallbackEXT(fBackendContext->fInstance,
                                                          &callbackCreateInfo, nullptr, &fCallback));
     }
 #endif
 
     if (!fMemoryAllocator) {
         // We were not given a memory allocator at creation
-        fMemoryAllocator.reset(new GrVkAMDMemoryAllocator(backendContext.fPhysicalDevice,
-                                                          fDevice, backendContext.fInterface));
+        fMemoryAllocator.reset(new GrVkAMDMemoryAllocator(fBackendContext->fPhysicalDevice,
+                                                          fDevice, fBackendContext->fInterface));
     }
 
     fCompiler = new SkSL::Compiler();
 
-    fVkCaps.reset(new GrVkCaps(options, this->vkInterface(), backendContext.fPhysicalDevice,
-                               backendContext.fFeatures, backendContext.fExtensions));
+    fVkCaps.reset(new GrVkCaps(options, this->vkInterface(), fBackendContext->fPhysicalDevice,
+                               fBackendContext->fFeatures, fBackendContext->fExtensions));
     fCaps.reset(SkRef(fVkCaps.get()));
 
-    VK_CALL(GetPhysicalDeviceProperties(backendContext.fPhysicalDevice, &fPhysDevProps));
-    VK_CALL(GetPhysicalDeviceMemoryProperties(backendContext.fPhysicalDevice, &fPhysDevMemProps));
+    VK_CALL(GetPhysicalDeviceProperties(fBackendContext->fPhysicalDevice, &fPhysDevProps));
+    VK_CALL(GetPhysicalDeviceMemoryProperties(fBackendContext->fPhysicalDevice, &fPhysDevMemProps));
 
     const VkCommandPoolCreateInfo cmdPoolInfo = {
         VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO,      // sType
         nullptr,                                         // pNext
         VK_COMMAND_POOL_CREATE_TRANSIENT_BIT |
         VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT, // CmdPoolCreateFlags
-        backendContext.fGraphicsQueueIndex,              // queueFamilyIndex
+        fBackendContext->fGraphicsQueueIndex,            // queueFamilyIndex
     };
     GR_VK_CALL_ERRCHECK(this->vkInterface(), CreateCommandPool(fDevice, &cmdPoolInfo, nullptr,
                                                                &fCmdPool));
@@ -206,15 +201,10 @@ void GrVkGpu::destroyResources() {
 
 #ifdef SK_ENABLE_VK_LAYERS
     if (fCallback) {
-        VK_CALL(DestroyDebugReportCallbackEXT(fInstance, fCallback, nullptr));
+        VK_CALL(DestroyDebugReportCallbackEXT(fBackendContext->fInstance, fCallback, nullptr));
     }
 #endif
 
-    fMemoryAllocator.reset();
-
-    fQueue = VK_NULL_HANDLE;
-    fDevice = VK_NULL_HANDLE;
-    fInstance = VK_NULL_HANDLE;
 }
 
 GrVkGpu::~GrVkGpu() {
diff --git a/src/gpu/vk/GrVkGpu.h b/src/gpu/vk/GrVkGpu.h
index f506d28b0e..052476098d 100644
--- a/src/gpu/vk/GrVkGpu.h
+++ b/src/gpu/vk/GrVkGpu.h
@@ -38,13 +38,13 @@ namespace SkSL {
 
 class GrVkGpu : public GrGpu {
 public:
-    static sk_sp<GrGpu> Make(const GrVkBackendContext&, const GrContextOptions&, GrContext*);
+    static sk_sp<GrGpu> Make(sk_sp<const GrVkBackendContext>, const GrContextOptions&, GrContext*);
 
     ~GrVkGpu() override;
 
     void disconnect(DisconnectType) override;
 
-    const GrVkInterface* vkInterface() const { return fInterface.get(); }
+    const GrVkInterface* vkInterface() const { return fBackendContext->fInterface.get(); }
     const GrVkCaps& vkCaps() const { return *fVkCaps; }
 
     GrVkMemoryAllocator* memoryAllocator() const { return fMemoryAllocator.get(); }
@@ -144,7 +144,7 @@ public:
     bool updateBuffer(GrVkBuffer* buffer, const void* src, VkDeviceSize offset, VkDeviceSize size);
 
 private:
-    GrVkGpu(GrContext*, const GrContextOptions&, const GrVkBackendContext& backendContext);
+    GrVkGpu(GrContext*, const GrContextOptions&, sk_sp<const GrVkBackendContext> backendContext);
 
     void onResetContext(uint32_t resetBits) override {}
 
@@ -222,27 +222,28 @@ private:
                                   GrVkImageInfo* info);
 #endif
 
-    sk_sp<const GrVkInterface>             fInterface;
-    sk_sp<GrVkMemoryAllocator>             fMemoryAllocator;
-    sk_sp<GrVkCaps>                        fVkCaps;
+    sk_sp<const GrVkBackendContext> fBackendContext;
+    sk_sp<GrVkMemoryAllocator>      fMemoryAllocator;
+    sk_sp<GrVkCaps>                 fVkCaps;
 
-    VkInstance                             fInstance;
-    VkDevice                               fDevice;
-    VkQueue                                fQueue;    // Must be Graphics queue
+    // These Vulkan objects are provided by the client, and also stored in fBackendContext.
+    // They're copied here for convenient access.
+    VkDevice                                     fDevice;
+    VkQueue                                      fQueue;    // Must be Graphics queue
 
     // Created by GrVkGpu
-    GrVkResourceProvider                   fResourceProvider;
-    VkCommandPool                          fCmdPool;
+    GrVkResourceProvider                         fResourceProvider;
+    VkCommandPool                                fCmdPool;
 
-    GrVkPrimaryCommandBuffer*              fCurrentCmdBuffer;
+    GrVkPrimaryCommandBuffer*                    fCurrentCmdBuffer;
 
-    SkSTArray<1, GrVkSemaphore::Resource*> fSemaphoresToWaitOn;
-    SkSTArray<1, GrVkSemaphore::Resource*> fSemaphoresToSignal;
+    SkSTArray<1, GrVkSemaphore::Resource*>       fSemaphoresToWaitOn;
+    SkSTArray<1, GrVkSemaphore::Resource*>       fSemaphoresToSignal;
 
-    VkPhysicalDeviceProperties             fPhysDevProps;
-    VkPhysicalDeviceMemoryProperties       fPhysDevMemProps;
+    VkPhysicalDeviceProperties                   fPhysDevProps;
+    VkPhysicalDeviceMemoryProperties             fPhysDevMemProps;
 
-    GrVkCopyManager                        fCopyManager;
+    GrVkCopyManager                              fCopyManager;
 
 #ifdef SK_ENABLE_VK_LAYERS
     // For reporting validation layer errors
@@ -251,11 +252,11 @@ private:
 
     // compiler used for compiling sksl into spirv. We only want to create the compiler once since
     // there is significant overhead to the first compile of any compiler.
-    SkSL::Compiler*                        fCompiler;
+    SkSL::Compiler* fCompiler;
 
     // We need a bool to track whether or not we've already disconnected all the gpu resources from
     // vulkan context.
-    bool                                   fDisconnected;
+    bool fDisconnected;
 
     typedef GrGpu INHERITED;
 };