public IImage LoadImage(Stream stream)
{
var mem = new MemoryStream((int)stream.Length);
stream.CopyTo(mem);
unsafe {
#if NET45
fixed(byte *x = mem.GetBuffer())
#else
ArraySegment <byte> segment;
if (!mem.TryGetBuffer(out segment))
{
throw new Exception("Could not get buffer from stream.");
}
fixed(byte *x = segment.Array)
#endif
{
var provider = new CGDataProvider(new IntPtr(x), (int)mem.Length, false);
var image = CGImage.FromPNG(provider, null, false, CGColorRenderingIntent.Default)
?? CGImage.FromJPEG(provider, null, false, CGColorRenderingIntent.Default);
return(new CGImageImage(image, 1));
}
}
}
// ReSharper disable once UnusedMember.Local
private void PhotoCaptureComplete(AVCapturePhotoOutput captureOutput, CMSampleBuffer finishedPhotoBuffer, CMSampleBuffer previewPhotoBuffer, AVCaptureResolvedPhotoSettings resolvedSettings, AVCaptureBracketedStillImageSettings bracketSettings, NSError error)
{
try
{
if (error != null)
{
_cameraModule.ErrorMessage = error.ToString();
}
else if (finishedPhotoBuffer != null)
{
LockPictureSpecificSettingsIfNothingCaptured();
using (var image = AVCapturePhotoOutput.GetJpegPhotoDataRepresentation(finishedPhotoBuffer, previewPhotoBuffer))
using (var imgDataProvider = new CGDataProvider(image))
using (var cgImage = CGImage.FromJPEG(imgDataProvider, null, false, CGColorRenderingIntent.Default))
using (var uiImage = UIImage.FromImage(cgImage, 1, GetOrientationForCorrection()))
{
_cameraModule.CapturedImage = uiImage.AsJPEG().ToArray();
}
}
}
catch (Exception e)
{
_cameraModule.ErrorMessage = e.ToString();
}
}
private static void SaveTempImage(CIImage fullimage, UIImage image, string outputFilename, int quality, bool rotate)
{
var imageData = image.AsJPEG(quality);
var dataProvider = new CGDataProvider(imageData);
var cgImageFromJpeg = CGImage.FromJPEG(dataProvider, null, false, CGColorRenderingIntent.Default);
var imageWithExif = new NSMutableData();
var destination = CGImageDestination.Create(imageWithExif, UTType.JPEG, 1);
var cgImageMetadata = new CGMutableImageMetadata();
var options = new CGImageDestinationOptions();
if (fullimage.Properties.DPIWidthF != null)
{
options.Dictionary[ImageIO.CGImageProperties.DPIWidth] =
new NSNumber((nfloat)fullimage.Properties.DPIWidthF);
}
if (fullimage.Properties.DPIWidthF != null)
{
options.Dictionary[ImageIO.CGImageProperties.DPIHeight] =
new NSNumber((nfloat)fullimage.Properties.DPIHeightF);
}
options.ExifDictionary = fullimage.Properties?.Exif ?? new CGImagePropertiesExif();
options.TiffDictionary = fullimage.Properties?.Tiff ?? new CGImagePropertiesTiff();
options.GpsDictionary = fullimage.Properties?.Gps ?? new CGImagePropertiesGps();
options.JfifDictionary = fullimage.Properties?.Jfif ?? new CGImagePropertiesJfif();
options.IptcDictionary = fullimage.Properties?.Iptc ?? new CGImagePropertiesIptc();
if (rotate)
{
options.Dictionary[ImageIO.CGImageProperties.Orientation] =
new NSString(UIImageOrientation.Up.ToString());
var tiffDict = new CGImagePropertiesTiff();
foreach (KeyValuePair <NSObject, NSObject> x in options.TiffDictionary.Dictionary)
{
tiffDict.Dictionary.SetValueForKey(x.Value, x.Key as NSString);
}
tiffDict.Dictionary.SetValueForKey(new NSNumber(1), new NSString("Orientation"));
options.TiffDictionary = tiffDict;
}
else
{
if (fullimage.Properties.Orientation != null)
{
options.Dictionary[ImageIO.CGImageProperties.Orientation] =
new NSString(image.Orientation.ToString());
}
}
destination.AddImageAndMetadata(cgImageFromJpeg, cgImageMetadata, options);
var success = destination.Close();
if (success)
{
imageWithExif.Save(outputFilename, true);
}
else
{
imageData.Save(outputFilename, true);
}
}
public void TestCreateBitmapFromCGImage()
{
// Load CGImage
var path = @"../../data/SetupLogo.jpg";
Debug.WriteLine(System.IO.Path.GetFullPath(path));
var provider = new CGDataProvider(path);
var cgImage = CGImage.FromJPEG(provider, null, false, CGColorRenderingIntent.Default);
// Convert it to System.Drawing.Bitmap using Bitmap's internal constructor
var bitmap = cgImage.ToBitmap();
Assert.AreEqual(cgImage.Width, bitmap.Width);
}
public IImage LoadImage(string path)
{
var provider = new CGDataProvider(path);
CGImage image;
if (System.IO.Path.GetExtension(path).ToLowerInvariant() == ".png")
{
image = CGImage.FromPNG(provider, null, false, CGColorRenderingIntent.Default);
}
else
{
image = CGImage.FromJPEG(provider, null, false, CGColorRenderingIntent.Default);
}
return(new CGImageImage(image, 1));
}
public IImage LoadImage(Stream stream)
{
var mem = new MemoryStream((int)stream.Length);
stream.CopyTo(mem);
unsafe
{
fixed(byte *x = mem.GetBuffer())
{
var provider = new CGDataProvider(new IntPtr(x), (int)mem.Length, false);
var image = CGImage.FromPNG(provider, null, false, CGColorRenderingIntent.Default)
?? CGImage.FromJPEG(provider, null, false, CGColorRenderingIntent.Default);
return(new CGImageImage(image, 1));
}
}
}
private bool SaveImageWithMetadata(UIImage image, float quality, NSDictionary meta, string path)
{
var imageData = image.AsJPEG(quality);
var dataProvider = new CGDataProvider(imageData);
var cgImageFromJpeg = CGImage.FromJPEG(dataProvider, null, false, CGColorRenderingIntent.Default);
var imageWithExif = new NSMutableData();
var destination = CGImageDestination.Create(imageWithExif, UTType.JPEG, 1);
var cgImageMetadata = new CGMutableImageMetadata();
var destinationOptions = new CGImageDestinationOptions();
if (meta.ContainsKey(ImageIO.CGImageProperties.ExifDictionary))
{
destinationOptions.ExifDictionary =
new CGImagePropertiesExif(meta[ImageIO.CGImageProperties.ExifDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.TIFFDictionary))
{
destinationOptions.TiffDictionary = new CGImagePropertiesTiff(meta[ImageIO.CGImageProperties.TIFFDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.GPSDictionary))
{
destinationOptions.GpsDictionary =
new CGImagePropertiesGps(meta[ImageIO.CGImageProperties.GPSDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.JFIFDictionary))
{
destinationOptions.JfifDictionary =
new CGImagePropertiesJfif(meta[ImageIO.CGImageProperties.JFIFDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.IPTCDictionary))
{
destinationOptions.IptcDictionary =
new CGImagePropertiesIptc(meta[ImageIO.CGImageProperties.IPTCDictionary] as NSDictionary);
}
destination.AddImageAndMetadata(cgImageFromJpeg, cgImageMetadata, destinationOptions);
var success = destination.Close();
if (success)
{
imageWithExif.Save(path, true);
}
return(success);
}
public BitmapImplementation(Stream stream)
{
byte[] data;
using (var ms = new MemoryStream()) {
stream.CopyTo(ms);
data = ms.ToArray();
}
cgImage = CGImage.FromPNG(new CGDataProvider(data), null, false, CGColorRenderingIntent.Default);
if (cgImage == null)
{
cgImage = CGImage.FromJPEG(new CGDataProvider(data), null, false, CGColorRenderingIntent.Default);
}
var alphaInfo = cgImage.AlphaInfo;
HasAlpha =
alphaInfo != CGImageAlphaInfo.None &&
alphaInfo != CGImageAlphaInfo.NoneSkipFirst &&
alphaInfo != CGImageAlphaInfo.NoneSkipLast;
}
// ReSharper disable once UnusedMember.Local
private void PhotoCaptureComplete(AVCapturePhotoOutput captureOutput, CMSampleBuffer finishedPhotoBuffer, CMSampleBuffer previewPhotoBuffer, AVCaptureResolvedPhotoSettings resolvedSettings, AVCaptureBracketedStillImageSettings bracketSettings, NSError error)
{
try
{
if (error != null)
{
_cameraModule.ErrorMessage = error.ToString();
}
else if (finishedPhotoBuffer != null)
{
if (!(_cameraModule.BluetoothOperator.PairStatus == PairStatus.Connected &&
!_cameraModule.BluetoothOperator.IsPrimary))
{
LockPictureSpecificSettingsIfApplicable();
}
using (var image = AVCapturePhotoOutput.GetJpegPhotoDataRepresentation(finishedPhotoBuffer, previewPhotoBuffer))
using (var imgDataProvider = new CGDataProvider(image))
using (var cgImage = CGImage.FromJPEG(imgDataProvider, null, false, CGColorRenderingIntent.Default))
using (var uiImage = UIImage.FromImage(cgImage, 1, GetOrientationForCorrection()))
{
var imageBytes = uiImage.AsJPEG().ToArray();
if (_cameraModule.BluetoothOperator.PairStatus == PairStatus.Connected &&
!_cameraModule.BluetoothOperator.IsPrimary)
{
_cameraModule.BluetoothOperator.SendCapture(imageBytes);
}
else
{
_cameraModule.CapturedImage = imageBytes;
}
}
}
}
catch (Exception e)
{
_cameraModule.ErrorMessage = e.ToString();
}
}
private bool SaveImageWithMetadata(UIImage image, float quality, NSDictionary meta, string path)
{
try
{
var finalQuality = quality;
var imageData = 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");
}
var dataProvider = new CGDataProvider(imageData);
var cgImageFromJpeg = CGImage.FromJPEG(dataProvider, null, false, CGColorRenderingIntent.Default);
var imageWithExif = new NSMutableData();
var destination = CGImageDestination.Create(imageWithExif, UTType.JPEG, 1);
var cgImageMetadata = new CGMutableImageMetadata();
var destinationOptions = new CGImageDestinationOptions();
if (meta.ContainsKey(ImageIO.CGImageProperties.Orientation))
{
destinationOptions.Dictionary[ImageIO.CGImageProperties.Orientation] = meta[ImageIO.CGImageProperties.Orientation];
}
if (meta.ContainsKey(ImageIO.CGImageProperties.DPIWidth))
{
destinationOptions.Dictionary[ImageIO.CGImageProperties.DPIWidth] = meta[ImageIO.CGImageProperties.DPIWidth];
}
if (meta.ContainsKey(ImageIO.CGImageProperties.DPIHeight))
{
destinationOptions.Dictionary[ImageIO.CGImageProperties.DPIHeight] = meta[ImageIO.CGImageProperties.DPIHeight];
}
if (meta.ContainsKey(ImageIO.CGImageProperties.ExifDictionary))
{
destinationOptions.ExifDictionary =
new CGImagePropertiesExif(meta[ImageIO.CGImageProperties.ExifDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.TIFFDictionary))
{
destinationOptions.TiffDictionary = new CGImagePropertiesTiff(meta[ImageIO.CGImageProperties.TIFFDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.GPSDictionary))
{
destinationOptions.GpsDictionary =
new CGImagePropertiesGps(meta[ImageIO.CGImageProperties.GPSDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.JFIFDictionary))
{
destinationOptions.JfifDictionary =
new CGImagePropertiesJfif(meta[ImageIO.CGImageProperties.JFIFDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.IPTCDictionary))
{
destinationOptions.IptcDictionary =
new CGImagePropertiesIptc(meta[ImageIO.CGImageProperties.IPTCDictionary] as NSDictionary);
}
destination.AddImageAndMetadata(cgImageFromJpeg, cgImageMetadata, destinationOptions);
var success = destination.Close();
if (success)
{
imageWithExif.Save(path, true);
}
return(success);
}
catch (Exception ex)
{
Console.WriteLine($"Unable to save image with metadata: {ex}");
}
return(false);
}
internal static bool SaveImageWithMetadata(UIImage image, float quality, NSDictionary meta, string path, string pathExtension)
{
if (UIDevice.CurrentDevice.CheckSystemVersion(13, 0))
{
return(SaveImageWithMetadataiOS13(image, quality, meta, path, pathExtension));
}
try
{
pathExtension = pathExtension.ToLowerInvariant();
var finalQuality = quality;
var imageData = pathExtension == "jpg" ? image.AsJPEG(finalQuality) : image.AsPNG();
//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");
}
var dataProvider = new CGDataProvider(imageData);
var cgImageFromJpeg = CGImage.FromJPEG(dataProvider, null, false, CGColorRenderingIntent.Default);
var imageWithExif = new NSMutableData();
var destination = CGImageDestination.Create(imageWithExif, UTType.JPEG, 1);
var cgImageMetadata = new CGMutableImageMetadata();
var destinationOptions = new CGImageDestinationOptions();
if (meta.ContainsKey(ImageIO.CGImageProperties.Orientation))
{
destinationOptions.Dictionary[ImageIO.CGImageProperties.Orientation] = meta[ImageIO.CGImageProperties.Orientation];
}
if (meta.ContainsKey(ImageIO.CGImageProperties.DPIWidth))
{
destinationOptions.Dictionary[ImageIO.CGImageProperties.DPIWidth] = meta[ImageIO.CGImageProperties.DPIWidth];
}
if (meta.ContainsKey(ImageIO.CGImageProperties.DPIHeight))
{
destinationOptions.Dictionary[ImageIO.CGImageProperties.DPIHeight] = meta[ImageIO.CGImageProperties.DPIHeight];
}
if (meta.ContainsKey(ImageIO.CGImageProperties.ExifDictionary))
{
destinationOptions.ExifDictionary =
new CGImagePropertiesExif(meta[ImageIO.CGImageProperties.ExifDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.TIFFDictionary))
{
var existingTiffDict = meta[ImageIO.CGImageProperties.TIFFDictionary] as NSDictionary;
if (existingTiffDict != null)
{
var newTiffDict = new NSMutableDictionary();
newTiffDict.SetValuesForKeysWithDictionary(existingTiffDict);
newTiffDict.SetValueForKey(meta[ImageIO.CGImageProperties.Orientation], ImageIO.CGImageProperties.TIFFOrientation);
destinationOptions.TiffDictionary = new CGImagePropertiesTiff(newTiffDict);
}
}
if (meta.ContainsKey(ImageIO.CGImageProperties.GPSDictionary))
{
destinationOptions.GpsDictionary =
new CGImagePropertiesGps(meta[ImageIO.CGImageProperties.GPSDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.JFIFDictionary))
{
destinationOptions.JfifDictionary =
new CGImagePropertiesJfif(meta[ImageIO.CGImageProperties.JFIFDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.IPTCDictionary))
{
destinationOptions.IptcDictionary =
new CGImagePropertiesIptc(meta[ImageIO.CGImageProperties.IPTCDictionary] as NSDictionary);
}
destination.AddImageAndMetadata(cgImageFromJpeg, cgImageMetadata, destinationOptions);
var success = destination.Close();
if (success)
{
var saved = imageWithExif.Save(path, true, out NSError error);
if (error != null)
{
Debug.WriteLine($"Unable to save exif data: {error.ToString()}");
}
imageWithExif.Dispose();
imageWithExif = null;
}
return(success);
}
catch (Exception ex)
{
Console.WriteLine($"Unable to save image with metadata: {ex}");
}
return(false);
}
/// <summary>
/// Creates a composited image from a list of source images
/// </summary>
/// <param name="paths">The paths of the images, in order of lowest z-index to highest, to composite together</param>
/// <param name="saveLocation">Where to save the composited image</param>
/// <param name="overwrite"><c>true</c> to overwrite an existing file; otherwise <c>false</c>.</param>
public void CreateCompositeImage(List <string> paths, string saveLocation, bool overwrite)
{
if (!overwrite && Device.File.Exists(saveLocation))
{
return;
}
paths = paths.Where(path => path != null && Device.File.Exists(path)).ToList();
if (paths.Count == 0)
{
return;
}
try
{
var metric = System.DateTime.UtcNow;
Device.File.EnsureDirectoryExists(saveLocation);
using (new NSAutoreleasePool())
{
var images = new List <CGImage>(paths.Count);
images.AddRange(paths.Select <string, CGImage>(path => path.EndsWith(".png", StringComparison.InvariantCultureIgnoreCase) ?
CGImage.FromPNG(CGDataProvider.FromFile(path), null, false, CGColorRenderingIntent.Default) :
CGImage.FromJPEG(CGDataProvider.FromFile(path), null, false, CGColorRenderingIntent.Default)));
nint width = images[0].Width;
nint height = images[0].Height;
var bounds = new RectangleF(0, 0, width, height);
CGBitmapContext g = new CGBitmapContext(
System.IntPtr.Zero,
width,
height,
images[0].BitsPerComponent,
images[0].Width * 4,
CGColorSpace.CreateDeviceRGB(),
CGImageAlphaInfo.PremultipliedLast
);
foreach (var cgImage in images)
{
g.DrawImage(bounds, cgImage);
}
lock (padlock)
{
// UIImage.AsPNG() should be safe to run on a background thread, but MT 6.2.6.6 says otherwise.
// Xamarin confirmed that this was unintentional and that MT 6.2.7 will remove the UI check.
UIApplication.CheckForIllegalCrossThreadCalls = false;
NSError err = null;
UIImage.FromImage(g.ToImage()).AsPNG().Save(saveLocation, true, out err);
UIApplication.CheckForIllegalCrossThreadCalls = true;
}
}
Device.Log.Metric("ImageEngine icon creation", System.DateTime.UtcNow.Subtract(metric).TotalMilliseconds);
}
catch (Exception e)
{
Device.Log.Error("An error occurred while compositing the image", e);
}
}
private bool SaveImageWithMetadata(UIImage image, float quality, NSDictionary meta, string path)
{
try
{
var imageData = GetImageWithQuality(quality, image);
var dataProvider = new CGDataProvider(imageData);
var cgImageFromJpeg = CGImage.FromJPEG(dataProvider, null, false, CGColorRenderingIntent.Default);
var imageWithExif = new NSMutableData();
var destination = CGImageDestination.Create(imageWithExif, UTType.JPEG, 1);
var cgImageMetadata = new CGMutableImageMetadata();
var destinationOptions = new CGImageDestinationOptions();
if (meta.ContainsKey(ImageIO.CGImageProperties.DPIWidth))
destinationOptions.Dictionary[ImageIO.CGImageProperties.DPIWidth] = meta[ImageIO.CGImageProperties.DPIWidth];
if (meta.ContainsKey(ImageIO.CGImageProperties.DPIHeight))
destinationOptions.Dictionary[ImageIO.CGImageProperties.DPIHeight] = meta[ImageIO.CGImageProperties.DPIHeight];
if (meta.ContainsKey(ImageIO.CGImageProperties.ExifDictionary))
{
destinationOptions.ExifDictionary =
new CGImagePropertiesExif(meta[ImageIO.CGImageProperties.ExifDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.TIFFDictionary))
{
destinationOptions.TiffDictionary = new CGImagePropertiesTiff(meta[ImageIO.CGImageProperties.TIFFDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.GPSDictionary))
{
destinationOptions.GpsDictionary =
new CGImagePropertiesGps(meta[ImageIO.CGImageProperties.GPSDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.JFIFDictionary))
{
destinationOptions.JfifDictionary =
new CGImagePropertiesJfif(meta[ImageIO.CGImageProperties.JFIFDictionary] as NSDictionary);
}
if (meta.ContainsKey(ImageIO.CGImageProperties.IPTCDictionary))
{
destinationOptions.IptcDictionary =
new CGImagePropertiesIptc(meta[ImageIO.CGImageProperties.IPTCDictionary] as NSDictionary);
}
if (options.RotateImage)
{
if (meta.ContainsKey(ImageIO.CGImageProperties.Orientation))
destinationOptions.Dictionary[ImageIO.CGImageProperties.Orientation] = new NSString(UIImageOrientation.Up.ToString());
destinationOptions.TiffDictionary.Orientation = CoreImage.CIImageOrientation.TopLeft;
}
else
{
if (meta.ContainsKey(ImageIO.CGImageProperties.Orientation))
destinationOptions.Dictionary[ImageIO.CGImageProperties.Orientation] = meta[ImageIO.CGImageProperties.Orientation];
}
destination.AddImageAndMetadata(cgImageFromJpeg, cgImageMetadata, destinationOptions);
var success = destination.Close();
if (success)
{
imageWithExif.Save(path, true);
}
return success;
}
catch (Exception ex)
{
Console.WriteLine($"Unable to save image with metadata: {ex}");
}
return false;
}
private static CGImage CGImageFromJPEGFile(string filename)
{
var provider = new CGDataProvider(filename);
return(CGImage.FromJPEG(provider, null, false, CGColorRenderingIntent.AbsoluteColorimetric));
}
