> If you just need to display the image, use an NSImage
> (initWithContentsOfFile).
> If you need a greater control over metadata, use the ImageIO API
> (search CGImageSource in doc and sample codes).
This doesn't work:
CGImageSourceRef source = CGImageSourceCreateWithURL ((CFURLRef) [NSURL
fileURLWithPath:path], NULL);
NSDictionary* metadata = (NSDictionary
*)CGImageSourceCopyPropertiesAtIndex(source,0,NULL);
I get a dict with: ColorModel, Depth, DensityUnit etc. but no key with the
user text.
This works and retrieves the user text that was embedded in the image). Is
there a more Cocoa-way to do this ather than having to use QuickTime and
FSSpecs?
GraphicsImportComponent tGIC;
ComponentResult result;
UserData myUD;
Handle dataHandle;
CFStringRef cfString = nil;
FSRef theFSRef;
FSSpec theFSSpec;
OSErr err;
CFURLGetFSRef ((CFURLRef) [NSURL fileURLWithPath:path], &theFSRef);
err = FSGetCatalogInfo (&theFSRef, kFSCatInfoParentDirID, NULL, NULL,
&theFSSpec, NULL);
result = GetGraphicsImporterForFile (&theFSSpec, &tGIC);
if (result == noErr)
{
err = NewUserData(&myUD);
if (!err)
{
result = GraphicsImportGetMetaData (tGIC, myUD);
if (result == noErr)
{
dataHandle = NewHandle (0);
if (dataHandle)
{
err = GetUserDataText (myUD, dataHandle, kUserDataTextComment, 1, 0);
if (!err)
{
HLock (dataHandle);
cfString = CFStringCreateWithBytes (kCFAllocatorDefault, (UInt8 *)
(*dataHandle), GetHandleSize(dataHandle), kCFStringEncodingMacRoman, false);
}
}
}
}
}
}
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