private Bitmap StripQuickRouteHeader(Stream stream)
{
Bitmap targetImage = null;
if (stream != null)
{
// check if the image is an exported QuickRoute image; if yes, remove the border
var ed = QuickRouteJpegExtensionData.FromStream(stream);
var sourceImage = System.Drawing.Image.FromStream(stream);
rawData = new byte[stream.Length];
stream.Position = 0;
stream.Read(rawData, 0, (int)stream.Length);
if (ed != null)
{
targetImage = new Bitmap(ed.MapLocationAndSizeInPixels.Width, ed.MapLocationAndSizeInPixels.Height);
var g = Graphics.FromImage(targetImage);
g.DrawImage(sourceImage, new Rectangle(new Point(0, 0), ed.MapLocationAndSizeInPixels.Size), ed.MapLocationAndSizeInPixels, GraphicsUnit.Pixel);
g.Dispose();
}
else
{
targetImage = new Bitmap(sourceImage);
}
stream.Close();
stream.Dispose();
}
return(targetImage);
}
private void CalculateImageAndTransformationMatrix(string fileName)
{
var zipFile = new Ionic.Zip.ZipFile(fileName);
var mapSize = new Size();
Transformation = new Transformation();
// get entry for kml file and image file
KmlDocument kmlDocument = null;
foreach (var entry in zipFile)
{
if (entry.FileName == entry.LocalFileName && Path.GetExtension(entry.FileName) == ".kml")
{
using (var kmlStream = new MemoryStream())
{
entry.Extract(kmlStream);
kmlStream.Position = 0;
kmlDocument = new KmlDocument(kmlStream);
}
break;
}
}
if (kmlDocument != null)
{
// we have got a kml document, get map image file stream from it
foreach (var entry in zipFile)
{
if (entry.FileName == kmlDocument.ImageFileName)
{
ImageStream = new MemoryStream();
entry.Extract(ImageStream);
ImageStream.Position = 0;
// check if image is QR jpeg
var ed = QuickRouteJpegExtensionData.FromStream(ImageStream);
if (ed != null)
{
// get transformation matrix from QR jpeg metadata
Transformation = ed.Sessions.CalculateAverageTransformation();
ImageStream.Position = 0;
return;
}
else
{
// it is not, use normal image bounds
ImageStream.Position = 0;
mapSize = Image.FromStream(ImageStream).Size; // need to get image object to get image size
}
ImageStream.Position = 0;
break;
}
}
}
if (kmlDocument != null && ImageStream != null)
{
// finally, calculate the transformation
Transformation = new Transformation(kmlDocument.LongLatBox, mapSize);
}
}