Add GrVkCopyPipeline to handle vulkan copies as draws

src/gpu/vk/GrVkGpu.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrVkGpu_DEFINED
 #define GrVkGpu_DEFINED
 
 #define USE_SKSL 1
 
 #include "GrGpu.h"
 #include "GrGpuFactory.h"
 #include "vk/GrVkBackendContext.h"
 #include "GrVkCaps.h"
+#include "GrVkCopyManager.h"
 #include "GrVkIndexBuffer.h"
 #include "GrVkMemory.h"
 #include "GrVkResourceProvider.h"
 #include "GrVkVertexBuffer.h"
 #include "GrVkUtil.h"
 
 #if USE_SKSL
 namespace SkSL {
     class Compiler;
 }
@@ skipping 25 matching lines @@
     const GrVkInterface* vkInterface() const { return fBackendContext->fInterface; }
     const GrVkCaps& vkCaps() const { return *fVkCaps; }
 
     VkDevice device() const { return fDevice; }
     VkQueue  queue() const { return fQueue; }
     VkCommandPool cmdPool() const { return fCmdPool; }
     VkPhysicalDeviceMemoryProperties physicalDeviceMemoryProperties() const {
         return fPhysDevMemProps;
     }
 
-    GrVkResourceProvider& resourceProvider() { return fResourceProvider;  }
+    GrVkResourceProvider& resourceProvider() { return fResourceProvider; }
+
+    GrVkPrimaryCommandBuffer* currentCommandBuffer() { return fCurrentCmdBuffer; }
 
     enum SyncQueue {
         kForce_SyncQueue,
         kSkip_SyncQueue
     };
 
     bool onGetReadPixelsInfo(GrSurface* srcSurface, int readWidth, int readHeight, size_t rowBytes,
                              GrPixelConfig readConfig, DrawPreference*,
                              ReadPixelTempDrawInfo*) override;
 
@@ skipping 182 matching lines @@
     VkQueue                                fQueue;    // Must be Graphics queue
 
     // Created by GrVkGpu
     GrVkResourceProvider                   fResourceProvider;
     VkCommandPool                          fCmdPool;
     GrVkPrimaryCommandBuffer*              fCurrentCmdBuffer;
     VkPhysicalDeviceMemoryProperties       fPhysDevMemProps;
 
     SkAutoTDelete<GrVkHeap>                fHeaps[kHeapCount];
 
+    GrVkCopyManager                        fCopyManager;
+
 #ifdef SK_ENABLE_VK_LAYERS
     // For reporting validation layer errors
     VkDebugReportCallbackEXT               fCallback;
 #endif
 
 #if USE_SKSL
     SkSL::Compiler* fCompiler;
 #else
     // Shaderc compiler used for compiling glsl in spirv. We only want to create the compiler once
     // since there is significant overhead to the first compile of any compiler.
     shaderc_compiler_t fCompiler;
 #endif
 
     typedef GrGpu INHERITED;
 };
 
 #endif