Hide fields in SkImageInfo

include/core/SkImageInfo.h

Index: include/core/SkImageInfo.h
diff --git a/include/core/SkImageInfo.h b/include/core/SkImageInfo.h
index 3d82dc805c7998084986878283da43ef9f35b7b8..6204cb3b81ac9903dcb558acd5ea3158fb168eb6 100644
--- a/include/core/SkImageInfo.h
+++ b/include/core/SkImageInfo.h
@@ -136,36 +136,30 @@ bool SkColorTypeValidateAlphaType(SkColorType colorType, SkAlphaType alphaType,
  *  Describe an image's dimensions and pixel type.
  */
 struct SkImageInfo {
-    int         fWidth;
-    int         fHeight;
-    SkColorType fColorType;
-    SkAlphaType fAlphaType;
+public:
+    SkImageInfo()
+        : fWidth(0)
+        , fHeight(0)
+        , fColorType(kUnknown_SkColorType)
+        , fAlphaType(kIgnore_SkAlphaType)
+    {}
 
     static SkImageInfo Make(int width, int height, SkColorType ct, SkAlphaType at) {
-        SkImageInfo info = {
-            width, height, ct, at
-        };
-        return info;
+        return SkImageInfo(width, height, ct, at);
     }
 
     /**
      *  Sets colortype to the native ARGB32 type.
      */
     static SkImageInfo MakeN32(int width, int height, SkAlphaType at) {
-        SkImageInfo info = {
-            width, height, kN32_SkColorType, at
-        };
-        return info;
+        return SkImageInfo(width, height, kN32_SkColorType, at);
     }
 
     /**
      *  Sets colortype to the native ARGB32 type, and the alphatype to premul.
      */
     static SkImageInfo MakeN32Premul(int width, int height) {
-        SkImageInfo info = {
-            width, height, kN32_SkColorType, kPremul_SkAlphaType
-        };
-        return info;
+        return SkImageInfo(width, height, kN32_SkColorType, kPremul_SkAlphaType);
     }
 
     /**
@@ -176,24 +170,15 @@ struct SkImageInfo {
     }
 
     static SkImageInfo MakeA8(int width, int height) {
-        SkImageInfo info = {
-            width, height, kAlpha_8_SkColorType, kPremul_SkAlphaType
-        };
-        return info;
+        return SkImageInfo(width, height, kAlpha_8_SkColorType, kPremul_SkAlphaType);
     }
 
     static SkImageInfo MakeUnknown(int width, int height) {
-        SkImageInfo info = {
-            width, height, kUnknown_SkColorType, kIgnore_SkAlphaType
-        };
-        return info;
+        return SkImageInfo(width, height, kUnknown_SkColorType, kIgnore_SkAlphaType);
     }
 
     static SkImageInfo MakeUnknown() {
-        SkImageInfo info = {
-            0, 0, kUnknown_SkColorType, kIgnore_SkAlphaType
-        };
-        return info;
+        return SkImageInfo();
     }
 
     int width() const { return fWidth; }
@@ -217,6 +202,14 @@ struct SkImageInfo {
         return SkImageInfo::Make(newWidth, newHeight, fColorType, fAlphaType);
     }
 
+    SkImageInfo makeAlphaType(SkAlphaType newAlphaType) const {
+        return SkImageInfo::Make(fWidth, fHeight, fColorType, newAlphaType);
+    }
+    
+    SkImageInfo makeColorType(SkColorType newColorType) const {
+        return SkImageInfo::Make(fWidth, fHeight, newColorType, fAlphaType);
+    }
+    
     int bytesPerPixel() const {
         return SkColorTypeBytesPerPixel(fColorType);
     }
@@ -256,6 +249,24 @@ struct SkImageInfo {
     }
 
     SkDEBUGCODE(void validate() const;)
+
+#ifdef SK_SUPPORT_LEGACY_PUBLIC_IMAGEINFO_FIELDS
+public:
+#else
+private:
+#endif
+    int         fWidth;
+    int         fHeight;
+    SkColorType fColorType;
+    SkAlphaType fAlphaType;
+
+private:
+    SkImageInfo(int width, int height, SkColorType ct, SkAlphaType at)
+        : fWidth(width)
+        , fHeight(height)
+        , fColorType(ct)
+        , fAlphaType(at)
+    {}
 };
 
 #endif