private void ReadHeader()
{
try
{
_dataset = Gdal.Open(Filename, Access.GA_Update);
}
catch
{
try
{
_dataset = Gdal.Open(Filename, Access.GA_ReadOnly);
}
catch (Exception ex)
{
throw new GdalException(ex.ToString());
}
}
Init(_dataset.RasterXSize, _dataset.RasterYSize);
NumBands = _dataset.RasterCount;
WorldFile = new WorldFile();
WorldFile.Affine = new double[6];
double[] test = new double[6];
_dataset.GetGeoTransform(test);
Bounds = new RasterBounds(Height, Width, test);
WorldFile.Affine = test;
Close();
}
/// <summary>
/// Creates a new instance of gdalImage
/// </summary>
public GdalTiledImage(string filename):base(filename)
{
WorldFile = new WorldFile();
WorldFile.Affine = new double[6];
Gdal.AllRegister();
ReadHeader();
}
/// <summary>
/// Creates a new instance of gdalImage, and gets much of the header information without actually
/// reading any values from the file.
/// </summary>
public GdalImage(string filename)
{
Filename = filename;
WorldFile = new WorldFile();
WorldFile.Affine = new double[6];
Gdal.AllRegister();
ReadHeader();
}
/// <summary>
/// Creates the bitmap from the raw image specified. The bounds should be set on this later.
/// </summary>
/// <param name="rawImage">The raw image.</param>
public MWImageData(Image rawImage)
{
_myImage = new Bitmap(rawImage.Width, rawImage.Height);
Graphics g = Graphics.FromImage(_myImage);
g.DrawImageUnscaled(rawImage, 0, 0);
g.Dispose();
WorldFile = new WorldFile();
double[] aff = new[] { 1.0, 0, 0, -1.0, 0, _myImage.Height };
Bounds = new RasterBounds(_myImage.Height, _myImage.Width, aff);
MemorySetup();
}
/// <summary>
/// Constructs a new imagedata of the specified width and height.
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
public MWImageData(int width, int height)
{
WorldFile = new WorldFile();
double[] aff = new[] { 1.0, 0, 0, -1.0, 0, height };
Bounds = new RasterBounds(height, width, aff);
_myImage = new Bitmap(width, height);
MemorySetup();
}
/// <summary>
/// Opens the file, assuming that the filename has already been specified using a Dot Net Image object
/// </summary>
public override void Open()
{
if (_myImage != null) _myImage.Dispose();
Image temp;
try
{
temp = Image.FromFile(Filename);
}
catch (Exception ex)
{
System.Windows.Forms.MessageBox.Show("The Dot Net Image object threw the following exception: " + ex.Message);
return;
}
_myImage = new Bitmap(temp.Width, temp.Height, PixelFormat.Format32bppArgb);
Graphics g = Graphics.FromImage(_myImage);
g.DrawImage(temp, new Rectangle(0, 0, temp.Width, temp.Height));
g.Dispose();
temp.Dispose();
WorldFile = new WorldFile(Filename);
if (WorldFile.Affine == null)
{
WorldFile.Affine = new[] { .5, 1.0, 0, _myImage.Height - .5, 0, -1.0 };
}
Bounds = new RasterBounds(_myImage.Height, _myImage.Width, WorldFile.Affine);
NumBands = 4;
BytesPerPixel = 4;
ReadBytes();
}
/// <summary>
/// Creates a new image and world file, placing the default bounds at the origin, with one pixel per unit.
/// </summary>
/// <param name="filename">The string filename</param>
/// <param name="width">The integer width</param>
/// <param name="height">The integer height</param>
public override void CreateNew(string filename, int width, int height)
{
Filename = filename;
WorldFile = new WorldFile();
double[] aff = new[] { 1.0, 0, 0, -1.0, 0, height };
Bounds = new RasterBounds(height, width, aff);
WorldFile.Filename = WorldFile.GenerateFilename(filename);
_myImage = new Bitmap(width, height);
string ext = System.IO.Path.GetExtension(filename);
switch (ext)
{
case ".bmp": _myImage.Save(filename, ImageFormat.Bmp); break;
case ".emf": _myImage.Save(filename, ImageFormat.Emf); break;
case ".exf": _myImage.Save(filename, ImageFormat.Exif); break;
case ".gif": _myImage.Save(filename, ImageFormat.Gif); break;
case ".ico": _myImage.Save(filename, ImageFormat.Icon); break;
case ".jpg": _myImage.Save(filename, ImageFormat.Jpeg); break;
case ".mbp": _myImage.Save(filename, ImageFormat.MemoryBmp); break;
case ".png": _myImage.Save(filename, ImageFormat.Png); break;
case ".tif": _myImage.Save(filename, ImageFormat.Tiff); break;
case ".wmf": _myImage.Save(filename, ImageFormat.Wmf); break;
}
NumBands = 4;
BytesPerPixel = 4;
ReadBytes();
}
/// <summary>
/// Creates a new instance of ImageData
/// </summary>
public ImageData()
{
TypeName = "Image";
_bounds = new RasterBounds(0, 0, new double[] { 0, 1, 0, 0, 0, -1 });
_worldFile = new WorldFile();
}
