Move NSImage-to-CGImageRef conversion code into a common helper function in base/mac_util.h.

base/mac_util.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_MAC_UTIL_H_
 #define BASE_MAC_UTIL_H_
 #pragma once
 
 #include <Carbon/Carbon.h>
 #include <string>
 #include <vector>
 
 class FilePath;
 
 #ifdef __OBJC__
 @class NSBundle;
 @class NSWindow;
 #else
 class NSBundle;
+class NSImage;
 class NSWindow;
 #endif
 
 // Adapted from NSPathUtilities.h and NSObjCRuntime.h.
 #if __LP64__ || NS_BUILD_32_LIKE_64
 typedef unsigned long NSSearchPathDirectory;
 #else
 typedef unsigned int NSSearchPathDirectory;
 #endif
 
@@ skipping 104 matching lines @@
 
 // Utility function to pull out a value from a dictionary, check its type, and
 // return it.  Returns NULL if the key is not present or of the wrong type.
 CFTypeRef GetValueFromDictionary(CFDictionaryRef dict,
                                  CFStringRef key,
                                  CFTypeID expected_type);
 
 // Sets the process name as displayed in Activity Monitor to process_name.
 void SetProcessName(CFStringRef process_name);
 
+// Converts a NSImage to a CGImageRef.  Normally, the system frameworks can do
+// this fine, especially on 10.6.  On 10.5, however, CGImage cannot handle
+// converting a PDF-backed NSImage into a CGImageRef.  This function will
+// rasterize the PDF into a bitmap CGImage.  The caller is responsible for
+// releasing the return value.
+CGImageRef CopyNSImageToCGImage(NSImage* image);
+
 }  // namespace mac_util
 
 #endif  // BASE_MAC_UTIL_H_