public CTFontCollection(CTFontCollectionOptions options)
{
handle = CTFontCollectionCreateFromAvailableFonts(
options == null ? IntPtr.Zero : options.Dictionary.Handle);
if (handle == IntPtr.Zero)
{
throw ConstructorError.Unknown(this);
}
}
public CTFontCollection(CTFontDescriptor[] queryDescriptors, CTFontCollectionOptions options)
{
using (var descriptors = queryDescriptors == null
? null
: CFArray.FromNativeObjects(queryDescriptors))
handle = CTFontCollectionCreateWithFontDescriptors(
descriptors == null ? IntPtr.Zero : descriptors.Handle,
options == null ? IntPtr.Zero : options.Dictionary.Handle);
if (handle == IntPtr.Zero)
{
throw ConstructorError.Unknown(this);
}
}
public CTFontDescriptor [] GetMatchingFontDescriptors(CTFontCollectionOptions options)
{
var cfArrayRef = CTFontCollectionCreateMatchingFontDescriptorsWithOptions(handle, options == null ? IntPtr.Zero : options.Dictionary.Handle);
if (cfArrayRef == IntPtr.Zero)
{
return(Array.Empty <CTFontDescriptor> ());
}
var matches = NSArray.ArrayFromHandle(cfArrayRef,
fd => new CTFontDescriptor(fd, false));
CFObject.CFRelease(cfArrayRef);
return(matches);
}
public CTFontCollection WithFontDescriptors(CTFontDescriptor[] queryDescriptors, CTFontCollectionOptions options)
{
IntPtr h;
using (var descriptors = queryDescriptors == null
? null
: CFArray.FromNativeObjects(queryDescriptors)) {
h = CTFontCollectionCreateCopyWithFontDescriptors(
handle,
descriptors == null ? IntPtr.Zero : descriptors.Handle,
options == null ? IntPtr.Zero : options.Dictionary.Handle);
}
if (h == IntPtr.Zero)
{
return(null);
}
return(new CTFontCollection(h, true));
}
