static bool SaveImageWithMetadataiOS13(UIImage image, NSDictionary meta, string path, string fileExt)
{
try
{
var imageData = fileExt == "png" ? image.AsPNG() : image.AsJPEG();
if (imageData == null)
{
throw new NullReferenceException("Unable to convert image to jpeg, please ensure file exists or lower quality level");
}
// Copy over meta data
using (var ciImage = CIImage.FromData(imageData))
using (var newImageSource = ciImage.CreateBySettingProperties(meta))
using (var ciContext = new CIContext())
{
if (fileExt == "png")
{
return(ciContext.WritePngRepresentation(newImageSource, NSUrl.FromFilename(path), CIFormat.ARGB8, CGColorSpace.CreateSrgb(), new NSDictionary(), out var error2));
}
return(ciContext.WriteJpegRepresentation(newImageSource, NSUrl.FromFilename(path), CGColorSpace.CreateSrgb(), new NSDictionary(), out var error));
}
}
catch (Exception ex)
{
Console.WriteLine($"Unable to save image with metadata: {ex}");
}
return(false);
}
internal static bool SaveImageWithMetadataiOS13(UIImage image, float quality, NSDictionary meta, string path, string pathExtension)
{
try
{
pathExtension = pathExtension.ToLowerInvariant();
var finalQuality = quality;
var imageData = pathExtension == "png" ? image.AsPNG(): image.AsJPEG(finalQuality);
//continue to move down quality , rare instances
while (imageData == null && finalQuality > 0)
{
finalQuality -= 0.05f;
imageData = image.AsJPEG(finalQuality);
}
if (imageData == null)
throw new NullReferenceException("Unable to convert image to jpeg, please ensure file exists or lower quality level");
// Copy over meta data
using var ciImage = CIImage.FromData(imageData);
using var newImageSource = ciImage.CreateBySettingProperties(meta);
using var ciContext = new CIContext();
if (pathExtension == "png")
return ciContext.WritePngRepresentation(newImageSource, NSUrl.FromFilename(path), CIFormat.ARGB8, CGColorSpace.CreateSrgb(), new NSDictionary(), out var error2);
return ciContext.WriteJpegRepresentation(newImageSource, NSUrl.FromFilename(path), CGColorSpace.CreateSrgb(), new NSDictionary(), out var error);
}
catch (Exception ex)
{
Console.WriteLine($"Unable to save image with metadata: {ex}");
}
return false;
}
