Mac Forum / Programming / CodeWarrior / January 2004

Hi,

I need to get the 'icl8' icon from a Mac OS X .icns file. The code I
use is as follows:

    CFStringRef thePath = CFSTR("/Applications/Internet Explorer.app");
    theAppURLRef = CFURLCreateWithFileSystemPath(kCFAllocatorDefault,
thePath, kCFURLPOSIXPathStyle, FALSE);

    if (theAppURLRef != NULL)
    {
        theBundleRef = CFBundleCreate(kCFAllocatorDefault, theAppURLRef);
        if (theBundleRef != NULL)
        {
            CFDictionaryRef theBundleInfoDict =
CFBundleGetInfoDictionary(theBundleRef);
            CFStringRef theIcnsFileName = (CFStringRef)
CFDictionaryGetValue(theBundleInfoDict, CFSTR("CFBundleIconFile"));
            theMutIcnsFileName = CFStringCreateMutableCopy(kCFAllocatorDefault,
0, theIcnsFileName);
            CFStringTrim(theMutIcnsFileName, CFSTR(".icns"));
            CFURLRef theIcnsURLRef = CFBundleCopyResourceURL(theBundleRef,
theMutIcnsFileName, CFSTR("icns"), NULL);

            if (theIcnsURLRef != NULL)
            {
                OSErr         err;
                FSRef         theRef;
                FSSpec        theSpec;
                FSRefParam     theRefParam;
                bool        found = false;
                IconFamilyHandle theIconFamilyHandle = NULL;
               
                found = CFURLGetFSRef(theIcnsURLRef, &theRef);
                if (found)
                {
                    theRefParam.ref = &theRef;
                    theRefParam.whichInfo  = kFSCatInfoNone;
                    theRefParam.catInfo  = NULL;
                    theRefParam.spec  = &theSpec;
                    theRefParam.parentRef  = NULL;
                    theRefParam.outName  = NULL;

                    err = PBGetCatalogInfoSync(&theRefParam);
                    if (err == noErr)
                        err = ReadIconFile(theRefParam.spec, &theIconFamilyHandle);
                    if (err == noErr)
                    {
                        IconSuiteRef icl8Ref = NULL;
                        Handle icl8 = NULL;
                       
                        err = IconFamilyToIconSuite (theIconFamilyHandle,
kSelectorLarge8Bit , &icl8Ref);
                        err = GetIconFromSuite(&icl8, icl8Ref, 'icl8');
                   
                        .....

                    }
                }
           
            }
        }

    }
    CFRelease(theAppURLRef);
    CFRelease(theBundleRef);
    CFRelease(theMutIcnsFileName);
    CFRelease(theIcnsURLRef);

----
In this case (for Internet Explorer.app), GetIconFromSuite() returns
the desired 'icl8' data to the icl8 variable. It also works for
Sherlock.app. However for Mail.app, I get a NULL value for the icl8
variable (err is 0). Using IconComposer I open MacIE.icns and
app.icns. Both have the Large (32 x 32) icons. I assume they are the
8-bit large icons. I am not able to find any other tools to verify
that either the .icns file really does not have the 'icl8' data or
some thing is wrong with the code.

PowerBook G4 867Mhz
Mac OS 10.2.6
CW Pro 8.3, Carbon Target

Any help is appreciated,
an