public void UnsupportedInputImage()
{
// some filters do not support inputImage (which we bound to the Image property)
using (var filter = new CICheckerboardGenerator()) {
// but if we call ObjC then we get a native exception and crash on devices
Assert.False(filter.RespondsToSelector(new Selector("inputImage")), "inputImage");
// so we return null in those cases
Assert.Null(filter.Image, "Image");
}
}
public static CGImage GenerateCheckerboard(CGRect frame, CIColor c0, CIColor c1)
{
using (var board = new CICheckerboardGenerator()
{
Color0 = c0,
Color1 = c1,
Width = (float)Math.Min(frame.Height / 2f, 10),
Center = new CIVector(new nfloat[] { 0, 0 }),
}) {
using (var context = new CIContext(null)) {
return(context.CreateCGImage(board.OutputImage, new CGRect(0, 0, frame.Width, frame.Height)));
}
}
}
public CIImage CheckerboardGenerator()
{
// Color 1
var c0 = CIColor.FromRgb(1, 0, 0);
var c1 = CIColor.FromRgb(0, 1, 0);
var checker = new CICheckerboardGenerator()
{
Color0 = c0,
Color1 = c1,
Center = new CIVector(new float[] { 10, 10 }), // Default [80 80]
Sharpness = 1F // Default 1
};
return(Crop(checker));
}
public CIImage CheckerboardGenerator ()
{
// Color 1
var c0 = CIColor.FromRgb (1, 0, 0);
var c1 = CIColor.FromRgb (0, 1, 0);
var checker = new CICheckerboardGenerator ()
{
Color0 = c0,
Color1 = c1,
Center = new CIVector (new float[] { 10 , 10 }), // Default [80 80]
Sharpness = 1F // Default 1
};
return Crop (checker);
}
