public static ExifData ReadExifData(string path)
{
var exifData = new ExifData();
using (FileStream fs = System.IO.File.OpenRead(path))
{
try
{
var exifReader = new ExifReader(fs);
if (exifReader.GetTagValue <DateTime>(ExifTags.DateTimeDigitized, out DateTime datePictureTaken))
{
exifData.timeTaken = datePictureTaken;
}
if (exifReader.GetTagValue <double>(ExifTags.GPSImgDirection, out double exifHeading))
{
exifData.heading = exifHeading;
}
if (exifReader.GetTagValue <UInt16>(ExifTags.FocalLengthIn35mmFilm, out UInt16 exifFocalLength35mm))
{
exifData.focalLength35mm = exifFocalLength35mm > 0 ? exifFocalLength35mm : (int?)null;
}
if (exifReader.GetTagValue <double[]>(ExifTags.GPSLongitude, out double[] exifGpsLongArray) &&
public static async Task <PhotoData> Import(string path, ExifData exifData, IAppContext appContext)
{
using (FileStream fs = System.IO.File.OpenRead(path))
{
byte[] bytes;
using (BinaryReader br = new BinaryReader(fs))
{
bytes = br.ReadBytes((int)fs.Length);
}
var bmp = BitmapFactory.DecodeByteArray(bytes, 0, bytes.Length);
var imgWidth = bmp.Width;
var imgHeight = bmp.Height;
var thumbWidth = THUMBNAIL_WIDTH;
var thumbHeight = THUMBNAIL_HEIGHT;
var filename = ImageSaverUtils.GetPhotoFileName();
var filepath = System.IO.Path.Combine(ImageSaverUtils.GetPhotosFileFolder(), filename);
var file = new Java.IO.File(filepath);
byte[] thumbnail = ImageResizer.ResizeImageAndroid(bytes, thumbWidth, thumbHeight, THUMBNAIL_QUALITY);
using (var output = new Java.IO.FileOutputStream(file))
{
output.Write(bytes);
}
PoiDatabase poiDatabase = new PoiDatabase();
string jsonCategories = JsonConvert.SerializeObject(appContext.Settings.Categories);
PhotoData photodata = new PhotoData
{
Datetime = DateTime.Now,
DatetimeTaken = exifData.timeTaken ?? DateTime.Now,
PhotoFileName = filename,
Longitude = exifData.location?.Longitude ?? 0,
Latitude = exifData.location?.Latitude ?? 0,
Altitude = exifData.location?.Altitude ?? 0,
Heading = exifData.heading,
LeftTiltCorrector = 0,
RightTiltCorrector = 0,
Thumbnail = thumbnail,
JsonCategories = jsonCategories,
PictureWidth = imgWidth,
PictureHeight = imgHeight,
MinAltitude = appContext.Settings.MinAltitute,
MaxDistance = appContext.Settings.MaxDistance,
FavouriteFilter = appContext.ShowFavoritesOnly,
ShowElevationProfile = appContext.Settings.ShowElevationProfile
};
//calculate view angle from focal length equivalent on 35mm camera, or use default viev angle 60dg
var viewAngle = exifData.focalLength35mm.HasValue ? 2 * System.Math.Tan(35d / 2d / (double)exifData.focalLength35mm.Value) / System.Math.PI * 180 : 60;
if (imgWidth > imgHeight)
{
photodata.ViewAngleHorizontal = viewAngle;
photodata.ViewAngleVertical = viewAngle / imgWidth * imgHeight;
}
else
{
photodata.ViewAngleHorizontal = viewAngle / imgHeight * imgWidth;
photodata.ViewAngleVertical = viewAngle;
}
if (GpsUtils.HasLocation(exifData.location))
{
var placeInfo = await PlaceNameProvider.AsyncGetPlaceName(exifData.location);
photodata.Tag = placeInfo.PlaceName + " -> ?";
}
else
{
photodata.Tag = "? -> ?";
}
appContext.PhotosModel.InsertItem(photodata);
return(photodata);
}
}
