/// <summary>
/// Copy the data from the CGImage to the current Image object
/// </summary>
internal static void ToImage <TColor, TDepth>(this CGImage cgImage, Image <TColor, TDepth> image)
where TColor : struct, IColor
where TDepth : new()
{
//Don't do this, Xamarin.iOS won't be able to resolve: if (this is Image<Rgba, Byte>)
if (typeof(TColor) == typeof(Rgba) && typeof(TDepth) == typeof(byte))
{
Debug.Assert((image.Width == (int)cgImage.Width) && (image.Height == (int)cgImage.Height), "Incompatible dimension between the CGImage and Image<,>.");
RectangleF rect = new RectangleF(PointF.Empty, new SizeF(cgImage.Width, cgImage.Height));
using (CGColorSpace cspace = CGColorSpace.CreateDeviceRGB())
using (CGBitmapContext context = new CGBitmapContext(
image.MIplImage.ImageData,
image.Width, image.Height,
8,
image.Width * 4,
cspace,
CGImageAlphaInfo.PremultipliedLast))
context.DrawImage(rect, cgImage);
}
else
{
using (Image <Rgba, Byte> tmp = cgImage.ToImage <Rgba, Byte>())
image.ConvertFrom(tmp);
}
}
/// <summary>
/// Creating an Image from the UIImage
/// </summary>
public static Image <TColor, TDepth> ToImage <TColor, TDepth> (this UIImage uiImage)
where TColor : struct, IColor
where TDepth : new()
//: this( (int) uiImage.Size.Width, (int) uiImage.Size.Height)
{
using (CGImage cgImage = uiImage.CGImage) {
return(cgImage.ToImage <TColor, TDepth> ());
}
}
/// <summary>
/// Creating an Image from the CGImage
/// </summary>
public static Image <TColor, TDepth> ToImage <TColor, TDepth>(this CGImage cgImage)
where TColor : struct, IColor
where TDepth : new()
{
Image <TColor, TDepth> image = new Image <TColor, TDepth>((int)cgImage.Width, (int)cgImage.Height);
cgImage.ToImage <TColor, TDepth>(image);
return(image);
}
