Use transfer buffer for BatchAtlas texture copies

src/gpu/GrGpu.h

Index: src/gpu/GrGpu.h
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index 3e3a4cd676b0388ef72b41def0fc3f7d6f5e0256..4697b7b824ae7fa3ac4e33493674beacc06fe7e0 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -289,9 +289,9 @@ public:
                      size_t rowBytes);
 
     /**
-     * Updates the pixels in a rectangle of a surface using a buffer
+     * Updates the pixels in a rectangle of a texture using a buffer
      *
-     * @param surface          The surface to write to.
+     * @param textre           The texture to write to.
      * @param left             left edge of the rectangle to write (inclusive)
      * @param top              top edge of the rectangle to write (inclusive)
      * @param width            width of rectangle to write in pixels.
@@ -302,10 +302,10 @@ public:
      * @param rowBytes         number of bytes between consecutive rows. Zero
      *                         means rows are tightly packed.
      */
-    bool transferPixels(GrSurface* surface,
+    bool transferPixels(GrTexture* texture,
                         int left, int top, int width, int height,
                         GrPixelConfig config, GrBuffer* transferBuffer,
-                        size_t offset, size_t rowBytes);
+                        size_t offset, size_t rowBytes, GrFence* fence);
 
     /**
      * This is can be called before allocating a texture to be a dst for copySurface. This is only
@@ -371,6 +371,10 @@ public:
     // Provides a hook for post-flush actions (e.g. PLS reset and Vulkan command buffer submits).
     virtual void finishDrawTarget() {}
 
+    virtual GrFence SK_WARN_UNUSED_RESULT insertFence() const = 0;
+    virtual bool waitFence(GrFence) const = 0;
+    virtual void deleteFence(GrFence) const = 0;
+
     ///////////////////////////////////////////////////////////////////////////
     // Debugging and Stats
 
@@ -561,8 +565,8 @@ private:
                                GrPixelConfig config,
                                const SkTArray<GrMipLevel>& texels) = 0;
 
-    // overridden by backend-specific derived class to perform the surface write
-    virtual bool onTransferPixels(GrSurface*,
+    // overridden by backend-specific derived class to perform the texture transfer
+    virtual bool onTransferPixels(GrTexture*,
                                   int left, int top, int width, int height,
                                   GrPixelConfig config, GrBuffer* transferBuffer,
                                   size_t offset, size_t rowBytes) = 0;