UIImages.mm

   1 #import <Foundation/Foundation.h>
   2 #import <CoreGraphics/CoreGraphics.h>
   3
   4 #import <UIKit/UIKeyboard.h>
   5 #import <UIKit/UIImage.h>
   6
   7 extern "C" {
   8     #include <mach-o/nlist.h>
   9 }
  10
  11 extern "C" NSData *UIImagePNGRepresentation(UIImage *image);
  12
  13 template <typename Type_>
  14 static void nlset(Type_ &function, struct nlist *nl, size_t index) {
  15     struct nlist &name(nl[index]);
  16     uintptr_t value(name.n_value);
  17     if ((name.n_desc & N_ARM_THUMB_DEF) != 0)
  18         value |= 0x00000001;
  19     function = reinterpret_cast<Type_>(value);
  20 }
  21
  22 int main(int argc, char *argv[]) {
  23     NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
  24
  25     struct nlist nl[4];
  26
  27     memset(nl, 0, sizeof(nl));
  28     nl[0].n_un.n_name = (char *) "___mappedImages";
  29     nl[1].n_un.n_name = (char *) "__UISharedImageInitialize";
  30     nl[2].n_un.n_name = (char *) "_LoadMappedImageRef";
  31     nlist("/System/Library/Frameworks/UIKit.framework/UIKit", nl);
  32
  33     NSMutableDictionary **images;
  34     nlset(images, nl, 0);
  35
  36     void (*__UISharedImageInitialize)(bool);
  37     nlset(__UISharedImageInitialize, nl, 1);
  38
  39     CGImageRef (*_LoadMappedImageRef)(CFStringRef);
  40     nlset(_LoadMappedImageRef, nl, 2);
  41
  42     __UISharedImageInitialize(false);
  43
  44     NSArray *keys = [*images allKeys];
  45     for (int i(0), e([keys count]); i != e; ++i) {
  46         NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
  47         NSString *key = [keys objectAtIndex:i];
  48         CGImageRef ref;
  49         if (_LoadMappedImageRef == NULL)
  50             ref = reinterpret_cast<CGImageRef>([*images objectForKey:key]);
  51         else
  52             ref = _LoadMappedImageRef(reinterpret_cast<CFStringRef>(key));
  53         UIImage *image = [UIImage imageWithCGImage:ref];
  54         NSData *data = UIImagePNGRepresentation(image);
  55         [data writeToFile:[NSString stringWithFormat:@"%@", key] atomically:YES];
  56         [pool release];
  57     }
  58
  59     [pool release];
  60     return 0;
  61 }