/// <summary>
/// Read image file
/// </summary>
/// <param name="aFile">File name</param>
///<returns>image layer</returns>
public static ImageLayer ReadImageFile(string aFile)
{
string oEx = Path.GetExtension(aFile);
string sEx = oEx.Remove(2, 1);
sEx = sEx + "w";
string wFile = aFile.Replace(oEx, sEx);
Image aImage = new Bitmap(aFile);
ImageLayer aImageLayer = new ImageLayer();
aImageLayer.FileName = aFile;
aImageLayer.WorldFileName = wFile;
aImageLayer.Image = aImage;
aImageLayer.LayerName = Path.GetFileName(aFile);
aImageLayer.Visible = true;
if (File.Exists(wFile))
{
aImageLayer.ReadImageWorldFile(wFile);
}
else
{
WorldFilePara aWFP = new WorldFilePara();
aWFP.XUL = 0;
aWFP.YUL = 90;
aWFP.XScale = 0.05;
aWFP.YScale = -0.05;
aWFP.XRotate = 0;
aWFP.YRotate = 0;
aImageLayer.WorldFileParaV = aWFP;
aImageLayer.WriteImageWorldFile(wFile, aImageLayer.WorldFileParaV);
}
double XBR, YBR;
XBR = aImageLayer.Image.Width * aImageLayer.WorldFileParaV.XScale + aImageLayer.WorldFileParaV.XUL;
YBR = aImageLayer.Image.Height * aImageLayer.WorldFileParaV.YScale + aImageLayer.WorldFileParaV.YUL;
Extent aExtent = new Extent();
aExtent.minX = aImageLayer.WorldFileParaV.XUL;
aExtent.minY = YBR;
aExtent.maxX = XBR;
aExtent.maxY = aImageLayer.WorldFileParaV.YUL;
aImageLayer.Extent = aExtent;
aImageLayer.LayerDrawType = LayerDrawType.Image;
aImageLayer.IsMaskout = true;
return(aImageLayer);
}