public Stream GetImage(State p_state)
{
string fname = ConfigurationManager.AppSettings["JP2CachePath"] + p_state.File;
if (!File.Exists(fname))
{
throw new IIIFException(getErrorXml(new Error { Code = "i3f_200", Message = p_state.File + " does not exist" }));
}
try
{
return GetImageUsingKDUExpand(p_state);
}
catch (IIIFException e)
{
throw e;
}
catch (Exception e)
{
throw e;
}
}
private Stream GetImageUsingKDUExpand(State p_state)
{
try
{
string fname = ConfigurationManager.AppSettings["JP2CachePath"] + p_state.File;
float starty = 0;
float startx = 0;
double tileheight = 1;
double tilewidth = 1;
string[] regions = null;
float scale = 0;
float scalex = 0;
float scaley = 0;
Metadata imageSize = GetJP2Metadata(fname);
regions = p_state.Region.Split(new char[] { ',' });
if (regions.Length == 4)
{
if (!regions[0].StartsWith("%"))
{
tilewidth = int.Parse(regions[2]);
tileheight = int.Parse(regions[3]);
}
else
{
tilewidth = double.Parse(regions[2]) * imageSize.Width;
tileheight = double.Parse(regions[3]) * imageSize.Height;
}
}
// assume all region returned
else
{
startx = 0;
starty = 0;
}
float wScale = (float)p_state.Width / imageSize.Width;
float hScale = (float)p_state.Height / imageSize.Height;
scale = scalex = scaley = 1;
startx = 0;
starty = 0;
switch (p_state.SizeType)
{
case "resize":
if (p_state.Region.Equals("all"))
{
scalex = wScale;
scaley = hScale;
if (p_state.SizeType.Equals("best"))
{
if (scalex < scaley)
{
scale = scalex;
}
else
{
scale = scaley;
}
}
else
{
if (scalex > scaley)
{
scale = scalex;
}
else
{
scale = scaley;
}
}
tilewidth = Convert.ToInt32(imageSize.Width * scale);
tileheight = Convert.ToInt32(imageSize.Height * scale);
}
else if (p_state.Width != 0 && p_state.Height != 0)
{
if (tilewidth > 0)
scalex = (float)(p_state.Width / tilewidth);
else
scalex = wScale;
if (tileheight > 0)
scaley = (float)(p_state.Height / tileheight);
else
scaley = hScale;
if (p_state.Width == p_state.Height)
{
scale = scalex; // both scales should be the same so shouldn't matter
}
else if (p_state.Width > p_state.Height)
{
scale = scalex;
}
else
{
scale = scaley;
}
}
else if (p_state.Width > p_state.Height)
{
if (tilewidth > 0)
scale = (float)(p_state.Width / tilewidth);
else
scale = wScale;
scaley = scalex = scale;
}
else
{
if (tileheight > 0)
scale = (float)(p_state.Height / tileheight);
else
scale = hScale;
}
// get all
if (!p_state.SizeType.Equals("resize") && p_state.Region.Equals("all"))
{
if (p_state.Width != 0)
tilewidth = p_state.Width;
if (p_state.Height != 0)
tileheight = p_state.Height;
}
break;
case "best":
if (tilewidth > 0)
scalex = (float)(p_state.Width / tilewidth);
else
scalex = wScale;
if (tileheight > 0)
scaley = (float)(p_state.Height / tileheight);
else
scaley = hScale;
if (scalex < scaley)
scale = scalex;
else
scale = scaley;
// get all
if (p_state.Region.Equals("all"))
{
tileheight = int.Parse(Math.Round(imageSize.Height * scale).ToString());
tilewidth = int.Parse(Math.Round(imageSize.Width * scale).ToString());
}
break;
case "proportion":
//scale = scalex = scaley = p_state.Size;
scale = p_state.Size;
// get all
if (p_state.Region.Equals("all"))
{
tileheight = int.Parse(Math.Round(imageSize.Height * scale).ToString());
tilewidth = int.Parse(Math.Round(imageSize.Width * scale).ToString());
}
break;
default:
if (wScale < hScale)
scale = wScale;
else
scale = hScale;
scalex = scaley = scale;
break;
}
regions = p_state.Region.Split(new char[] { ',' });
string region = "";
if (regions.Length == 4)
{
// for percentage regions
if (p_state.Region.StartsWith("%"))
{
startx = float.Parse(regions[0].Substring(1));
starty = float.Parse(regions[1]);
tilewidth = float.Parse(regions[2]);
tileheight = float.Parse(regions[3]);
}
else
{
startx = float.Parse(regions[0]) / imageSize.Width;
starty = float.Parse(regions[1]) / imageSize.Height;
tilewidth = float.Parse(regions[2]) / imageSize.Width;
tileheight = float.Parse(regions[3]) / imageSize.Height;
}
region = "{" + starty + "," + startx + "},{" + tileheight + "," + tilewidth + "}";
}
if (starty > 1 || startx > 1 || startx + tilewidth < 0 || starty + tileheight < 0)
{
throw new IIIFException(getErrorXml(new Error { Code = "i3f_400", Message = "Invalid region specified" }));
}
// try to get the closest possible size to the one we want in order to reduce the tile size
// when creating an image tile
int reduce = Convert.ToInt32(1 / scale);
if (reduce > 0)
reduce = Convert.ToInt32(Math.Floor(Math.Log(reduce, 2.5)));
p_state.Reduce = reduce;
string outputFile = ConfigurationManager.AppSettings["JP2CachePath"] + p_state.Target.Replace(".jpg", ".bmp");
ProcessStartInfo start = new ProcessStartInfo();
start.FileName = ConfigurationManager.AppSettings["ExpanderPath"];
start.UseShellExecute = false;
start.RedirectStandardOutput = false;
start.RedirectStandardError = true;
start.CreateNoWindow = true;
start.Arguments = "-resilient -quiet -i \"" + fname + "\" -o \"" +
outputFile +
"\" -reduce " + reduce +
(string.IsNullOrEmpty(region) ? "" : " -region " + region);
Process proc = Process.Start(start);
proc.WaitForExit();
BufferedStream bs = new BufferedStream(new FileStream(outputFile, FileMode.Open));
int length = (int)bs.Length;
byte[] imageBits = new byte[length];
// read the digital bits of the image into the byte array
bs.Read(imageBits, 0, length);
Image img = Image.FromStream(bs);
Bitmap bmp = new Bitmap(img);
MemoryStream stream = new MemoryStream();
bmp.Save(stream, ImageFormat.Jpeg);
// remove temporary bmp file
img.Dispose();
bs.Close();
bs.Dispose();
File.Delete(outputFile);
return stream;
}
catch (Exception)
{
throw;
}
}
private void GetImage(IAsyncResult p_res)
{
ImageRequestState state = (ImageRequestState)p_res.AsyncState;
if (state.err != null)
{
asynch.CompleteCall();
}
else {
lock (lockobj)
{
try
{
Extractor kdu = new Extractor();
State kdu_state = new State();
kdu_state.File = state.identifier.EndsWith(".jp2") ? state.identifier : state.identifier + ".jp2";
kdu_state.SizeType = state.sizeType;
kdu_state.Size = string.IsNullOrEmpty(state.size) ? 0 : float.Parse(state.size);
kdu_state.Width = string.IsNullOrEmpty(state.width) ? 0 : int.Parse(state.width);
kdu_state.Height = string.IsNullOrEmpty(state.height) ? 0 : int.Parse(state.height);
kdu_state.Region = state.region;
kdu_state.Format = state.format;
kdu_state.Quality = state.quality;
Stream stream = kdu.GetImage(kdu_state);
Image img = Image.FromStream(stream);
if (state.sizeType.Equals("resize"))
{
int sizeWidth = img.Width;
int sizeHeight = img.Height;
if (!string.IsNullOrEmpty(state.width) && !string.IsNullOrEmpty(state.height))
{
sizeWidth = Convert.ToInt32(state.width);
sizeHeight = Convert.ToInt32(state.height);
}
else if (!string.IsNullOrEmpty(state.width))
{
sizeWidth = Convert.ToInt32(state.width);
sizeHeight = (int)(((float)sizeWidth / img.Width) * sizeHeight);
}
else if (!string.IsNullOrEmpty(state.height))
{
sizeHeight = Convert.ToInt32(state.height);
sizeWidth = (int)(((float)sizeHeight / img.Height) * sizeWidth);
}
img = ResizeImage(img, sizeWidth, sizeHeight);
}
else if (state.sizeType.Equals("best"))
{
int sizeWidth = Convert.ToInt32(state.width);
int sizeHeight = Convert.ToInt32(state.height);
double regionWidth = img.Width;
if (!string.IsNullOrEmpty(state.regionWidth))
regionWidth = Convert.ToDouble(state.regionWidth);
double regionHeight = img.Height;
if (!string.IsNullOrEmpty(state.regionHeight))
regionHeight = Convert.ToDouble(state.regionHeight);
double scalex = sizeWidth / regionWidth;
double scaley = sizeHeight / regionHeight;
if (scalex < scaley)
img = ResizeImage(img, (int)(regionWidth * scalex), (int)(regionHeight * scalex));
else
img = ResizeImage(img, (int)(regionWidth * scaley), (int)(regionHeight * scaley));
}
else if (state.sizeType.Equals("proportion"))
{
double regionWidth = 0;
double regionHeight = 0;
if (state.region.Equals("all"))
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(kdu.GetMetadata(state.identifier.EndsWith(".jp2") ? state.identifier : state.identifier + ".jp2"));
regionWidth = Convert.ToInt32(doc.GetElementsByTagName("Width")[0].InnerText);
regionHeight = Convert.ToInt32(doc.GetElementsByTagName("Height")[0].InnerText);
}
else if (state.region.StartsWith("%"))
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(kdu.GetMetadata(state.identifier.EndsWith(".jp2") ? state.identifier : state.identifier + ".jp2"));
regionWidth = Convert.ToDouble(state.regionWidth) * Convert.ToInt32(doc.GetElementsByTagName("Width")[0].InnerText);
regionHeight = Convert.ToDouble(state.regionHeight) * Convert.ToInt32(doc.GetElementsByTagName("Height")[0].InnerText);
}
else
{
regionWidth = Convert.ToInt32(state.regionWidth);
regionHeight = Convert.ToInt32(state.regionHeight);
}
regionWidth *= Convert.ToDouble(state.size);
regionHeight *= Convert.ToDouble(state.size);
if (regionWidth < 1 || regionHeight < 1)
{
state.err = new error();
state.err.parameter = "region / size";
state.err.text = "Invalid region /size specified";
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
else
{
img = ResizeImage(img, (int)regionWidth, (int)regionHeight);
}
}
if (state.err == null)
{
if (!string.IsNullOrEmpty(state.quality))
{
if (state.quality.Equals("grey"))
img = MakeGrayscale(new Bitmap(img));
else if (state.quality.Equals("bitonal"))
img = MakeBitonal(new Bitmap(img));
}
switch (state.rotation)
{
case "90": img.RotateFlip(RotateFlipType.Rotate90FlipNone); break;
case "180": img.RotateFlip(RotateFlipType.Rotate180FlipNone); break;
case "270": img.RotateFlip(RotateFlipType.Rotate270FlipNone); break;
}
_bitmap = new Bitmap(img);
}
}
catch (IIIFException e)
{
state.err = new error();
try
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(e.Message);
if (doc.GetElementsByTagName("Code")[0].InnerText.Contains("i3f_200"))
{
state.err.parameter = "identifier";
state.err.text = doc.GetElementsByTagName("Message")[0].InnerText;
state.err.statusCode = System.Net.HttpStatusCode.NotFound;
}
else if (doc.GetElementsByTagName("Code")[0].InnerText.Contains("i3f_400"))
{
state.err.parameter = "region";
state.err.text = doc.GetElementsByTagName("Message")[0].InnerText;
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
else
{
state.err.parameter = "unknown";
state.err.text = e.Message;
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
catch (Exception ex)
{
state.err.parameter = "unknown";
state.err.text = ex.Message;
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
}
catch (Exception e)
{
state.err = new error();
state.err.parameter = "unknown";
state.err.text = e.Message;
state.err.statusCode = System.Net.HttpStatusCode.BadRequest;
}
finally
{
asynch.CompleteCall();
}
}
}
}
