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>

1 files changed, 8 insertions, 47 deletions

diff --git a/include/gpu/vk/GrVkBackendContext.h b/include/gpu/vk/GrVkBackendContext.h
index e68e27988a..fe018e494f 100644
--- a/include/gpu/vk/GrVkBackendContext.h
+++ b/include/gpu/vk/GrVkBackendContext.h
@@ -34,9 +34,11 @@ enum GrVkFeatureFlags {
 // is that the client will set these up and pass them to the GrVkGpu constructor. The VkDevice
 // created must support at least one graphics queue, which is passed in as well.
 // The QueueFamilyIndex must match the family of the given queue. It is needed for CommandPool
-// creation, and any GrBackendObjects handed to us (e.g., for wrapped textures) need to be created
-// in or transitioned to that family.
-struct SK_API GrVkBackendContext : public SkRefCnt {
+// creation, and any GrBackendObjects handed to us (e.g., for wrapped textures) needs to be created
+// in or transitioned to that family. The refs held by members of this struct must be released
+// (either by deleting the struct or manually releasing the refs) before the underlying vulkan
+// device and instance are destroyed.
+struct SK_API GrVkBackendContext {
     VkInstance                 fInstance;
     VkPhysicalDevice           fPhysicalDevice;
     VkDevice                   fDevice;
@@ -48,50 +50,9 @@ struct SK_API GrVkBackendContext : public SkRefCnt {
     sk_sp<const GrVkInterface> fInterface;
     sk_sp<GrVkMemoryAllocator> fMemoryAllocator;
 
-    /**
-     * Controls whether this object destroys the instance and device upon destruction. The default
-     * is temporarily 'true' to avoid breaking existing clients but will be changed to 'false'.
-     */
-    bool                       fOwnsInstanceAndDevice = true;
-
-#if GR_TEST_UTILS || defined(SK_BUILD_FOR_ANDROID_FRAMEWORK)
-    using CanPresentFn = std::function<bool(VkInstance, VkPhysicalDevice,
-                                            uint32_t queueFamilyIndex)>;
-
-    /**
-     * Helper function to create the Vulkan objects needed for a Vulkan-backed GrContext.
-     * Note that the version that uses the unified "GetProc" instead of separate "GetInstanceProc"
-     * and "GetDeviceProc" functions will be removed.
-     *
-     * If presentQueueIndex is non-NULL, will try to set up presentQueue as part of device
-     * creation using the platform-specific canPresent() function.
-     *
-     * This will set fOwnsInstanceAndDevice to 'true'. If it is subsequently set to 'false' then
-     * the client owns the lifetime of the created VkDevice and VkInstance.
-     */
-    static const GrVkBackendContext* Create(uint32_t* presentQueueIndex = nullptr,
-                                            CanPresentFn = CanPresentFn(),
-                                            GrVkInterface::GetProc getProc = nullptr);
-
-    static const GrVkBackendContext* Create(const GrVkInterface::GetInstanceProc& getInstanceProc,
-                                            const GrVkInterface::GetDeviceProc& getDeviceProc,
-                                            uint32_t* presentQueueIndex = nullptr,
-                                            CanPresentFn canPresent = CanPresentFn()) {
-        if (!getInstanceProc || !getDeviceProc) {
-            return nullptr;
-        }
-        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);
-        };
-        return Create(presentQueueIndex, canPresent, getProc);
-    }
-#endif // GR_TEST_UTILS || defined(SK_BUILD_FOR_ANDROID_FRAMEWORK)
-
-    ~GrVkBackendContext() override;
+    // This is deprecated and should be set to false. The client is responsible for managing the
+    // lifetime of the VkInstance and VkDevice objects.
+    bool                       fOwnsInstanceAndDevice = false;
 };
 
 #endif