More framework support for TransferBuffers

include/gpu/GrTypesPriv.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTypesPriv_DEFINED
 #define GrTypesPriv_DEFINED
 
@@ skipping 250 matching lines @@
     bool operator!=(const GrScissorState& other) const { return !(*this == other); }
 
     bool enabled() const { return fEnabled; }
     const SkIRect& rect() const { return fRect; }
 
 private:
     bool    fEnabled;
     SkIRect fRect;
 };
 
+/**
+ * Indicates the transfer direction for a transfer buffer
+ */
+enum TransferType {
+    /** Caller intends to use the buffer to transfer data to the GPU */
+    kCpuToGpu_TransferType,
+    /** Caller intends to use the buffer to transfer data from the GPU */
+    kGpuToCpu_TransferType
+};
+
+
 #ifdef SK_DEBUG
 // Takes a pointer to a GrCaps, and will suppress prints if required
 #define GrCapsDebugf(caps, ...)         \
     if (!caps->suppressPrints()) {      \
         SkDebugf(__VA_ARGS__);          \
     }
 #else
 #define GrCapsDebugf(caps, ...)
 #endif
 
 #endif