implement readPixels and writePixels natively, w/o using the (deprecated)

include/core/SkCanvas.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkCanvas_DEFINED
 #define SkCanvas_DEFINED
 
 #include "SkTypes.h"
 #include "SkBitmap.h"
 #include "SkDeque.h"
 #include "SkClipStack.h"
 #include "SkPaint.h"
 #include "SkRefCnt.h"
 #include "SkPath.h"
 #include "SkRegion.h"
 #include "SkXfermode.h"
 
 //#define SK_SUPPORT_LEGACY_READPIXELSCONFIG
 
+#ifdef SK_SUPPORT_LEGACY_READPIXELSCONFIG
+    #ifndef SK_SUPPORT_LEGACY_CONFIG8888
+        #define SK_SUPPORT_LEGACY_CONFIG8888
+    #endif
+#endif
+
 // if not defined, we always assume ClipToLayer for saveLayer()
 //#define SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
 
 
 //#define SK_SUPPORT_LEGACY_GETCLIPTYPE
 //#define SK_SUPPORT_LEGACY_GETTOTALCLIP
 //#define SK_SUPPORT_LEGACY_GETTOPDEVICE
 
 class SkBounder;
 class SkBaseDevice;
@@ skipping 191 matching lines @@
      *  return the ImageInfo and rowBytes. The returned address is only valid
      *  while the canvas object is in scope and unchanged. Any API calls made on
      *  canvas (or its parent surface if any) will invalidate the
      *  returned address (and associated information).
      *
      *  On failure, returns NULL and the info and rowBytes parameters are
      *  ignored.
      */
     const void* peekPixels(SkImageInfo* info, size_t* rowBytes);
 
+#ifdef SK_SUPPORT_LEGACY_CONFIG8888
     /**
      * This enum can be used with read/writePixels to perform a pixel ops to or
      * from an 8888 config other than Skia's native config (SkPMColor). There
      * are three byte orders supported: native, BGRA, and RGBA. Each has a
      * premultiplied and unpremultiplied variant.
      *
      * Components of a 8888 pixel can be packed/unpacked from a 32bit word using
      * either byte offsets or shift values. Byte offsets are endian-invariant
      * while shifts are not. BGRA and RGBA configs are defined by byte
      * orderings. The native config is defined by shift values (SK_A32_SHIFT,
@@ skipping 14 matching lines @@
          * low byte to high byte: B, G, R, A.
          */
         kBGRA_Premul_Config8888,
         kBGRA_Unpremul_Config8888,
         /**
          * low byte to high byte: R, G, B, A.
          */
         kRGBA_Premul_Config8888,
         kRGBA_Unpremul_Config8888
     };
+#endif
 
 #ifdef SK_SUPPORT_LEGACY_READPIXELSCONFIG
     /**
      *  On success (returns true), copy the canvas pixels into the bitmap.
      *  On failure, the bitmap parameter is left unchanged and false is
      *  returned.
      *
      *  The canvas' pixels are converted to the bitmap's config. The only
      *  supported config is kARGB_8888_Config, though this is likely to be
      *  relaxed in  the future. The meaning of config kARGB_8888_Config is
@@ skipping 1216 matching lines @@
     bool asROBitmap(SkBitmap*) const;
 
 private:
     SkBitmap    fBitmap;    // used if peekPixels() fails
     const void* fAddr;      // NULL on failure
     SkImageInfo fInfo;
     size_t      fRowBytes;
 };
 
 #endif