NSImage Exif (metadata)

Get metadata from NSImage

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1. + (NSDictionary*) exif : (NSString*) file  
2. {  
3.     NSDictionary* dic   =   nil;  
4.       
5.     NSURL* url          =   [ NSURL fileURLWithPath : file ];  
6.       
7.     if ( url )  
8.     {  
9.         CGImageSourceRef source = CGImageSourceCreateWithURL ( (CFURLRef) url, NULL);  
10.           
11.         if ( NULL == source )   
12.         {  
13. #ifdef _DEBUG  
14.             CGImageSourceStatus status = CGImageSourceGetStatus ( source );  
15.             NSLog ( @"Error: file name : %@ - Status: %d", file, status );  
16. #endif            
17.         }  
18.         else  
19.         {             
20.             CFDictionaryRef metadataRef = 
21.             CGImageSourceCopyPropertiesAtIndex ( source, 0, NULL );  
22.             if ( metadataRef )   
23.             {  
24.                 NSDictionary* immutableMetadata = (NSDictionary *)metadataRef;  
25.                 if ( immutableMetadata )  
26.                 {                 
27.                     dic =   
28.                 [ NSDictionary dictionaryWithDictionary : (NSDictionary *)metadataRef ];  
29.                 }                                          
30.                   
31.                 CFRelease ( metadataRef );  
32.             }  
33.               
34.             CFRelease(source);  
35.             source = nil;  
36.         }  
37.     }  
38.       
39.     return dic;  
40. }  

.........................................

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1. NSDictionary* dic = [ User_ImageLoader exif : filename ];  
2. if ( dic )  
3. {  
4.     NSString* s     =   [ dic valueForKey : @"Orientation" ];  
5.       
6.     NSLog(@"Image : %@ - orentation : %d", filename, [ s intValue ] );  
7. }  

LOG

2011-07-21 00:09:44.579 test.app [12105:7f03] Image : /Users/alexey/Desktop/Works/EXIF Orientation Sample Images/7.jpg - orentation : 7

2011-07-21 00:09:45.908 test.app [12105:7f03] Image : /Users/alexey/Desktop/Works/EXIF Orientation Sample Images/8.jpg - orentation : 8

Create CGImageRef with EXIF Orientation

NSMutableDictionary to NSUserDefaults

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1. NSMutableDictionary* dic = [ [ NSMutableDictionary alloc ] initWithObjectsAndKeys :   
2.                             @"500", @"MaxLoadedImages",   
3.                             @"10",  @"RequestMaxImages",  
4.                             nil ];   
5. if ( dic )  
6. {         
7.     [ [ NSUserDefaults standardUserDefaults ] setObject : dic forKey : @"flickr.com" ];       
8.     [ dic release ];  
9. }  

.............................

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1. NSDictionary* settings          =   [ [ NSUserDefaults standardUserDefaults ] objectForKey : @"flickr.com" ];  
2. NSInteger maxLoadedImages       =   [ [ settings objectForKey : @"MaxLoadedImages" ] integerValue ];  
3. NSInteger requestMaxImages      =   [ [ settings objectForKey : @"RequestMaxImages" ] integerValue ];  
4.   
5. NSLog(@"settings : %@", settings);  

LOG

2011-06-19 14:07:34.600 test.app[3464:6b03] settings : {
MaxLoadedImages = 500;
RequestMaxImages = 10;
}

ePic for Mac v1.1

What's New in Version 1.1

* Smoothing the edges of the pictures
* Improved stability of the application
* Accelerate work wih service Flickr (fixed bug for search by keyword)
* Fixed minor bugs in interface (fixed for old system's)
* Impover manage your viewing with the mouse, keyboard (nice shortcuts)

Download via Mac App Store (itunes link)
Donwload via Site (site link)

3d Slide Show (ePic)

ePic 3d slide show with fantastic physics.

Features

- Show photo from the flickr.com, iPhoto albums, or local folders.
- Physics-based filmstrip display
- Classic slide show mode with more effects
- Turn the app into a screen saver mode after a certain amount of inactivity
- Unique concept with physics

Download via Mac App Store

Get resource from bundle screensaver

1. NSBundle* bundle = [ NSBundle bundleForClass : [ class_id class ] ];    
2. // class_id - self gui    
3. NSString* fileName = [ bundle pathForResource:@"logo" ofType:@"png" ];  

NSString to wstring

NSString to std::wstring & std::wstring to NSString

1. std::wstring NSStringToStringW ( NSString* Str )   
2. {   
3.     NSStringEncoding pEncode    =   CFStringConvertEncodingToNSStringEncoding ( kCFStringEncodingUTF32LE );   
4.     NSData* pSData              =   [ Str dataUsingEncoding : pEncode ];    
5.    
6.     return std::wstring ( (wchar_t*) [ pSData bytes ], [ pSData length] / sizeof ( wchar_t ) );   
7. }   
8.    
9. NSString* StringWToNSString ( const std::wstring& Str )   
10. {   
11.     NSString* pString = [ [ NSString alloc ]    
12.                         initWithBytes : (char*)Str.data()   
13.                                length : Str.size() * sizeof(wchar_t)   
14.                              encoding : CFStringConvertEncodingToNSStringEncoding ( kCFStringEncodingUTF32LE ) ];   
15.     return pString;   
16. }  

.

Create a context for the drawing of the buffer.

CGContext Reference
CGColorSpace Reference

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1. int ImageWidth          =   512;   
2. int ImageHeight         =   512;   
3.    
4. unsigned char* pBuffer  =   NULL;   
5.    
6. CGContextRef CreateBitmapContext ()   
7. {   
8.     CGContextRef    pContext        =   NULL;   
9.     CGColorSpaceRef ColorSpace  =   CGColorSpaceCreateDeviceRGB ();   
10.    
11.     int bitmapByteCount     =   ( ImageWidth * 4 );   
12.     int bitmapBytesPerRow   =   ( bitmapBytesPerRow * ImageWidth );   
13.    
14.     pBuffer = new unsigned char [ bitmapByteCount ];   
15.    
16.     if ( NULL == pBuffer )   
17.     {   
18.         delete [] pBuffer;   
19.    
20.         CGColorSpaceRelease ( ColorSpace );   
21.    
22.         return NULL;   
23.     }   
24.    
25.     pContext    =   CGBitmapContextCreate (   
26.         pBuffer,   
27.         ImageWidth,   
28.         ImageHeight,   
29.         8,   
30.         bitmapBytesPerRow,   
31.         ColorSpace,   
32.         kCGImageAlphaPremultipliedLast );   
33.    
34.     if ( NULL == pContext )   
35.     {   
36.         delete [] m_pBuffer;   
37.    
38.         CGColorSpaceRelease( colorSpace );   
39.    
40.         return NULL;   
41.     }   
42.    
43.     CGColorSpaceRelease ( ColorSpace );   
44.    
45.     return pContext;   
46. }  

.