On Apr 3, 2008, at 2:13 AM, Trygve Inda wrote:
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 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?
I don't know about detaching from QuickTime, but you can at least get
rid of the FSSpec parts:
GraphicsImportComponent tGIC;
ComponentResult result;
UserData myUD;
Handle dataHandle;
CFStringRef cfString = nil;
FSRef theFSRef;
OSErr err;
Handle dataRef;
OSType dataRefType;
CFURLGetFSRef ((CFURLRef) [NSURL fileURLWithPath:path], &theFSRef);
result = QTNewDataReferenceFromFSRef(&theFSRef, 0, &dataRef,
&dataRefType);
if (result == noErr)
{
result = GetGraphicsImporterForDataRef(dataRef, dataRefType,
&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);
}
}
}
}
}
DisposeHandle(dataRef);
}
And a couple of other things I noticed:
- You could just use ComponentResult as your error/result variable
type since it handles a superset of OSErr values.
- You're not calling DisposeHandle(dataHandle).
steve
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