expose CGImage -> SkBitmap

include/utils/mac/SkCGUtils.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkCGUtils_DEFINED
 #define SkCGUtils_DEFINED
 
-#include "SkTypes.h"
+#include "SkSize.h"
+#include "SkImageInfo.h"
 
 #ifdef SK_BUILD_FOR_MAC
 #include <ApplicationServices/ApplicationServices.h>
 #endif
 
 #ifdef SK_BUILD_FOR_IOS
 #include <CoreGraphics/CoreGraphics.h>
 #endif
 
 class SkBitmap;
 class SkData;
 class SkStream;
 
 /**
+ *  Given a CGImage, allocate an SkBitmap and copy the image's pixels into it. If scaleToFit is not
+ *  null, use it to determine the size of the bitmap, and scale the image to fill the bitmap.
+ *  Otherwise use the image's width/height.
+ *
+ *  On failure, return false, and leave bitmap unchanged.
+ */
+SK_API bool SkCreateBitmapFromCGImage(SkBitmap* dst, CGImageRef src, SkISize* scaleToFit = NULL);
+
+/**
+ *  Copy the pixels from src into the memory specified by info/rowBytes/dstPixels. On failure,
+ *  return false (e.g. ImageInfo incompatible with src).
+ */
+SK_API bool SkCopyPixelsFromCGImage(const SkImageInfo& info, size_t rowBytes, void* dstPixels,
+                                    CGImageRef src);
+
+/**
  *  Create an imageref from the specified bitmap using the specified colorspace.
  *  If space is NULL, then CGColorSpaceCreateDeviceRGB() is used.
  */
 SK_API CGImageRef SkCreateCGImageRefWithColorspace(const SkBitmap& bm,
                                                    CGColorSpaceRef space);
 
 /**
  *  Create an imageref from the specified bitmap using the colorspace returned
  *  by CGColorSpaceCreateDeviceRGB()
  */
@@ skipping 22 matching lines @@
  *  CGDataProviderRef provider = SkStreamToDataProvider(stream);
  *  stream->unref();
  *
  *  Now when the provider is finally deleted, it will delete the stream.
  */
 CGDataProviderRef SkCreateDataProviderFromStream(SkStream*);
 
 CGDataProviderRef SkCreateDataProviderFromData(SkData*);
 
 #endif