Add vulkan files into skia repo.

src/gpu/vk/GrVkRenderTarget.h

Index: src/gpu/vk/GrVkRenderTarget.h
diff --git a/src/gpu/vk/GrVkRenderTarget.h b/src/gpu/vk/GrVkRenderTarget.h
new file mode 100644
index 0000000000000000000000000000000000000000..b4d72eac73cf36c4dd9b8d488510a05dc74e26de
--- /dev/null
+++ b/src/gpu/vk/GrVkRenderTarget.h
@@ -0,0 +1,137 @@
+/*
+ * 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 GrVkRenderTarget_DEFINED
+#define GrVkRenderTarget_DEFINED
+
+#include "GrVkImage.h"
+#include "GrRenderTarget.h"
+
+#include "GrVkRenderPass.h"
+
+class GrVkCommandBuffer;
+class GrVkFramebuffer;
+class GrVkGpu;
+class GrVkImageView;
+class GrVkStencilAttachment;
+
+#ifdef SK_BUILD_FOR_WIN
+// Windows gives bogus warnings about inheriting asTexture/asRenderTarget via dominance.
+#pragma warning(push)
+#pragma warning(disable: 4250)
+#endif
+
+class GrVkRenderTarget: public GrRenderTarget, public virtual GrVkImage {
+public:
+    static GrVkRenderTarget* CreateNewRenderTarget(GrVkGpu*, const GrSurfaceDesc&,
+                                                   GrGpuResource::LifeCycle,
+                                                   const GrVkImage::ImageDesc&);
+
+    static GrVkRenderTarget* CreateWrappedRenderTarget(GrVkGpu*, const GrSurfaceDesc&,
+                                                       GrGpuResource::LifeCycle,
+                                                       const GrVkImage::Resource* resource);
+
+    ~GrVkRenderTarget() override;
+
+    const GrVkFramebuffer* framebuffer() const { return fFramebuffer; }
+    const GrVkImageView* colorAttachmentView() const { return fColorAttachmentView; }
+    const GrVkImage::Resource* msaaImageResource() const { return fMSAAImageResource; }
+    const GrVkImageView* resolveAttachmentView() const { return fResolveAttachmentView; }
+    const GrVkImage::Resource* stencilImageResource() const;
+    const GrVkImageView* stencilAttachmentView() const;
+
+    const GrVkRenderPass* simpleRenderPass() const { return fCachedSimpleRenderPass; }
+
+    // override of GrRenderTarget
+    ResolveType getResolveType() const override {
+        return kCanResolve_ResolveType;
+    }
+
+    bool canAttemptStencilAttachment() const override {
+        return true;
+    }
+
+    GrBackendObject getRenderTargetHandle() const override;
+
+    // Returns the total number of attachments
+    void getAttachmentsDescriptor(GrVkRenderPass::AttachmentsDescriptor* desc,
+                                  GrVkRenderPass::AttachmentFlags* flags) const;
+    
+    void addResources(GrVkCommandBuffer& commandBuffer) const;
+
+protected:
+    enum Derived { kDerived };
+
+    GrVkRenderTarget(GrVkGpu* gpu,
+                     const GrSurfaceDesc& desc,
+                     GrGpuResource::LifeCycle,
+                     const GrVkImage::Resource* imageResource,
+                     const GrVkImage::Resource* msaaImageResource,
+                     const GrVkImageView* colorAttachmentView,
+                     const GrVkImageView* resolveAttachmentView);
+
+    GrVkRenderTarget(GrVkGpu* gpu,
+                     const GrSurfaceDesc& desc,
+                     GrGpuResource::LifeCycle,
+                     const GrVkImage::Resource* imageResource,
+                     const GrVkImage::Resource* msaaImageResource,
+                     const GrVkImageView* colorAttachmentView,
+                     const GrVkImageView* resolveAttachmentView,
+                     Derived);
+
+    GrVkRenderTarget(GrVkGpu* gpu,
+                     const GrSurfaceDesc& desc,
+                     GrGpuResource::LifeCycle,
+                     const GrVkImage::Resource* imageResource,
+                     const GrVkImageView* colorAttachmentView);
+
+    GrVkRenderTarget(GrVkGpu* gpu,
+                     const GrSurfaceDesc& desc,
+                     GrGpuResource::LifeCycle,
+                     const GrVkImage::Resource* imageResource,
+                     const GrVkImageView* colorAttachmentView,
+                     Derived);
+
+    static GrVkRenderTarget* Create(GrVkGpu*, const GrSurfaceDesc&,
+                                    GrGpuResource::LifeCycle,
+                                    const GrVkImage::Resource* imageResource);
+
+    GrVkGpu* getVkGpu() const;
+
+    void onAbandon() override;
+    void onRelease() override;
+
+    // This accounts for the texture's memory and any MSAA renderbuffer's memory.
+    size_t onGpuMemorySize() const override {
+        SkASSERT(kUnknown_GrPixelConfig != fDesc.fConfig);
+        SkASSERT(!GrPixelConfigIsCompressed(fDesc.fConfig));
+        size_t colorBytes = GrBytesPerPixel(fDesc.fConfig);
+        SkASSERT(colorBytes > 0);
+        return fColorValuesPerPixel * fDesc.fWidth * fDesc.fHeight * colorBytes;
+    }
+
+private:
+    bool completeStencilAttachment() override;
+
+    void createFramebuffer(GrVkGpu* gpu);
+
+    void releaseInternalObjects();
+    void abandonInternalObjects();
+
+    const GrVkFramebuffer*     fFramebuffer;
+    const GrVkImageView*       fColorAttachmentView;
+    const GrVkImage::Resource* fMSAAImageResource;
+    const GrVkImageView*       fResolveAttachmentView;
+    int                        fColorValuesPerPixel;
+    
+    // This is a cached pointer to a simple render pass. The render target should unref it
+    // once it is done with it.
+    const GrVkRenderPass*      fCachedSimpleRenderPass;
+};
+
+#endif