Add some copy support for vulkan msaa

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
 
@@ skipping 64 matching lines @@
                               WritePixelTempDrawInfo*) override;
 
     bool onCopySurface(GrSurface* dst,
                        GrSurface* src,
                        const SkIRect& srcRect,
                        const SkIPoint& dstPoint) override;
 
     void onGetMultisampleSpecs(GrRenderTarget* rt, const GrStencilSettings&,
                                int* effectiveSampleCnt, SamplePattern*) override;
 
-    bool initCopySurfaceDstDesc(const GrSurface* src, GrSurfaceDesc* desc) const override;
+    bool initDescForDstCopy(const GrRenderTarget* src, GrSurfaceDesc* desc) const override;
 
     void xferBarrier(GrRenderTarget*, GrXferBarrierType) override {}
 
     GrBackendObject createTestingOnlyBackendTexture(void* pixels, int w, int h,
                                                     GrPixelConfig config,
                                                     bool isRenderTarget) override;
     bool isTestingOnlyBackendTexture(GrBackendObject id) const override;
     void deleteTestingOnlyBackendTexture(GrBackendObject id, bool abandonTexture) override;
 
     GrStencilAttachment* createStencilAttachmentForRenderTarget(const GrRenderTarget*,
@@ skipping 117 matching lines @@
                                 const SkIRect& srcRect,
                                 const SkIPoint& dstPoint);
 
     void copySurfaceAsBlit(GrSurface* dst,
                            GrSurface* src,
                            GrVkImage* dstImage,
                            GrVkImage* srcImage,
                            const SkIRect& srcRect,
                            const SkIPoint& dstPoint);
 
+    void copySurfaceAsResolve(GrSurface* dst,
+                              GrSurface* src,
+                              const SkIRect& srcRect,
+                              const SkIPoint& dstPoint);
+
     void copySurfaceAsDraw(GrSurface* dst,
                            GrSurface* src,
                            const SkIRect& srcRect,
                            const SkIPoint& dstPoint);
 
     // helpers for onCreateTexture and writeTexturePixels
     bool uploadTexDataLinear(GrVkTexture* tex,
                              int left, int top, int width, int height,
                              GrPixelConfig dataConfig,
                              const void* data,
                              size_t rowBytes);
     bool uploadTexDataOptimal(GrVkTexture* tex,
                               int left, int top, int width, int height,
                               GrPixelConfig dataConfig,
                               const SkTArray<GrMipLevel>&);
 
+    void resolveImage(GrVkRenderTarget* dst,
+                      GrVkRenderTarget* src,
+                      const SkIRect& srcRect,
+                      const SkIPoint& dstPoint);
+
     SkAutoTUnref<const GrVkBackendContext> fBackendContext;
     SkAutoTUnref<GrVkCaps>                 fVkCaps;
 
     // 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;
@@ skipping 13 matching lines @@
 #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