Add flag for window rectangles to GrRenderTarget

include/gpu/GrTypes.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTypes_DEFINED
 #define GrTypes_DEFINED
 
@@ skipping 31 matching lines @@
     friend X operator | (X a, X b); \
     friend X& operator |= (X& a, X b); \
     \
     friend X operator & (X a, X b); \
     \
     template <typename T> \
     friend X operator & (T a, X b); \
     \
     template <typename T> \
     friend X operator & (X a, T b); \
+
+/**
+ * Defines bitwise operators that make it possible to use an enum class as a
+ * very basic bitfield.
+ */
+#define GR_MAKE_BITFIELD_CLASS_OPS(X) \
+    inline X operator | (X a, X b) { \
+        return (X) ((int)a | (int)b); \
+    } \
+    inline X& operator |= (X& a, X b) { \
+        return (a = a | b); \
+    } \
+    inline bool operator & (X a, X b) { \
+        return SkToBool((int)a & (int)b); \
+    }
+
+#define GR_DECL_BITFIELD_CLASS_OPS_FRIENDS(X) \
+    friend X operator | (X a, X b); \
+    friend X& operator |= (X& a, X b); \
+    friend bool operator & (X a, X b);
+
 ////////////////////////////////////////////////////////////////////////////////
 
 // compile time versions of min/max
 #define GR_CT_MAX(a, b) (((b) < (a)) ? (a) : (b))
 #define GR_CT_MIN(a, b) (((b) < (a)) ? (b) : (a))
 
 /**
  *  divide, rounding up
  */
 static inline int32_t GrIDivRoundUp(int x, int y) {
@@ skipping 573 matching lines @@
             return 4 * width * height;
     }
 }
 
 /**
  * This value translates to reseting all the context state for any backend.
  */
 static const uint32_t kAll_GrBackendState = 0xffffffff;
 
 #endif