Add GrVkCopyPipeline to handle vulkan copies as draws

src/gpu/vk/GrVkMemory.cpp

 /*
 * 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 "GrVkMemory.h"
 
 #include "GrVkGpu.h"
@@ skipping 196 matching lines @@
 VkPipelineStageFlags GrVkMemory::LayoutToPipelineStageFlags(const VkImageLayout layout) {
     if (VK_IMAGE_LAYOUT_GENERAL == layout) {
         return VK_PIPELINE_STAGE_ALL_COMMANDS_BIT;
     } else if (VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL == layout ||
                VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL == layout) {
         return VK_PIPELINE_STAGE_TRANSFER_BIT;
     } else if (VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL == layout ||
                VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL == layout ||
                VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL == layout ||
                VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL == layout) {
-        return VK_PIPELINE_STAGE_ALL_COMMANDS_BIT;
+        return VK_PIPELINE_STAGE_ALL_GRAPHICS_BIT;
     } else if (VK_IMAGE_LAYOUT_PREINITIALIZED == layout) {
         return VK_PIPELINE_STAGE_HOST_BIT;
     }
 
     SkASSERT(VK_IMAGE_LAYOUT_UNDEFINED == layout);
     return VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT;
 }
 
 VkAccessFlags GrVkMemory::LayoutToSrcAccessMask(const VkImageLayout layout) {
     // Currently we assume we will never being doing any explict shader writes (this doesn't include
@@ skipping 363 matching lines @@
             fSubHeaps[i]->free(alloc);
             fUsedSize -= alloc.fSize;
             return true;
         }
     }
 
     return false;
 }