/// <summary>
/// Reads the embedded image data from an image already in memory.
/// </summary>
/// <param name="image">Image in memory in which to read the embedded data</param>
/// <returns>ImageData class with the embedded data.</returns>
/// <exception cref="System.Exception">
/// Image loaded does not have all embedded data expected
/// </exception>
public static ImageInfo ReadImage(Image image, ImageInfo retData)
{
float num = 0;
float den = 0;
int degrees;
int minutes;
double seconds;
String str;
int height = image.Height;
int width = image.Width;
lock (image)
{
PropertyItem[] propItems = image.PropertyItems;
PropertyItem gpsTime = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.gpsTime);
PropertyItem gpsLat = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.gpsLat);
PropertyItem gpsLong = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.gpsLong);
PropertyItem gpsAlt = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.gpsAlt);
PropertyItem yaw = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.yaw);
PropertyItem gpsLatRef = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.gpsLatRef);
PropertyItem gpsLongRef = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.gpsLongRef);
PropertyItem dateTimeTaken = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.dateTimeTaken);
PropertyItem cameraModel = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.cameraModel);
PropertyItem focalLength = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.focalLength);
PropertyItem title = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.title);
PropertyItem comment = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.comment);
PropertyItem author = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.author);
PropertyItem keywords = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.keywords);
PropertyItem subject = propItems.FirstOrDefault(p => p.Id == (int)ProportyItemId.subject);
if (cameraModel != null)
{
str = asciiEncoder.GetString(cameraModel.Value);
retData.CameraModel = str;
}
if (height > 0)
{
retData.Height = height;
}
if (width > 0)
{
retData.Width = width;
}
if (dateTimeTaken != null)
{
str = asciiEncoder.GetString(dateTimeTaken.Value);
str = str.Trim();
str = str.Substring(0, str.Length - 1);
StringBuilder s = new StringBuilder(str);
s[4] = '/';
s[7] = '/';
retData.DateTimeCreated = DateTime.Parse(s.ToString());
}
if (gpsTime != null)
{
retData.GPSHours = BitConverter.ToInt32(gpsTime.Value, 0);
retData.GPSMinutes = BitConverter.ToInt32(gpsTime.Value, 8);
num = (float)BitConverter.ToInt32(gpsTime.Value, 16);
den = (float)BitConverter.ToInt32(gpsTime.Value, 20);
retData.GPSSeconds = num / den;
}
if (gpsAlt != null)
{
num = (float)BitConverter.ToInt32(gpsAlt.Value, 0);
den = (float)BitConverter.ToInt32(gpsAlt.Value, 4);
retData.GPSAltitude = num / den;
}
// Latitude
if (gpsLat != null)
{
degrees = BitConverter.ToInt32(gpsLat.Value, 0);
minutes = BitConverter.ToInt32(gpsLat.Value, 8);
seconds = (double)BitConverter.ToInt32(gpsLat.Value, 16) / (double)BitConverter.ToInt32(gpsLat.Value, 20);
retData.GPSLatitudeDegrees = System.Math.Round((double)(degrees * 3600 + minutes * 60 + seconds) / 3600d, 6);
}
// Longitude
if (gpsLong != null)
{
degrees = BitConverter.ToInt32(gpsLong.Value, 0);
minutes = BitConverter.ToInt32(gpsLong.Value, 8);
seconds = (double)BitConverter.ToInt32(gpsLong.Value, 16) / (double)BitConverter.ToInt32(gpsLong.Value, 20);
retData.GPSLongitudeDegrees = System.Math.Round((double)(degrees * 3600 + minutes * 60 + seconds) / 3600d, 6);
}
if (gpsLatRef != null)
{
retData.GPSLatitudeRef = asciiEncoder.GetString(gpsLatRef.Value, 0, 1);
}
if (gpsLongRef != null)
{
retData.GPSLongitudeRef = asciiEncoder.GetString(gpsLongRef.Value, 0, 1);
}
if (yaw != null)
{
num = (float)BitConverter.ToInt32(yaw.Value, 0);
den = (float)BitConverter.ToInt32(yaw.Value, 4);
retData.Yaw = num / den;
}
if (focalLength != null)
{
retData.FocalLength = BitConverter.ToInt32(focalLength.Value, 0);
}
if (title != null)
{
retData.Title = title.GetMetaValueString();
}
if (comment != null)
{
retData.Comments = comment.GetMetaValueString();
}
if (author != null)
{
retData.Author = author.GetMetaValueString();
}
if (keywords != null)
{
retData.Keywords = keywords.GetMetaValueString();
}
if (subject != null)
{
retData.Subject = subject.GetMetaValueString();
}
}
return(retData);
}
