/// <summary>
/// Returns the data from the file in the form of ARGB bytes, regardless of how the image
/// data is actually stored in the file.
/// </summary>
/// <param name="startRow">The zero based integer index of the first row (Y)</param>
/// <param name="startColumn">The zero based integer index of the first column (X)</param>
/// <param name="numRows">The number of rows to read</param>
/// <param name="numColumns">The number of columns to read</param>
/// <param name="overview">The integer overview. 0 for the original image. Each successive index divides the length and height in half. </param>
/// <returns>A Byte of values in ARGB order and in row-major raster-scan sequence</returns>
public byte[] ReadWindow(int startRow, int startColumn, int numRows, int numColumns, int overview)
{
EnsureDatasetOpen();
_red = _dataset.GetRasterBand(1);
byte[] result = null;
if (_red.GetRasterColorInterpretation() == ColorInterp.GCI_PaletteIndex)
{
result = ReadPaletteBuffered(startRow, startColumn, numRows, numColumns, overview);
}
if (_red.GetRasterColorInterpretation() == ColorInterp.GCI_GrayIndex)
{
result = ReadGrayIndex(startRow, startColumn, numRows, numColumns, overview);
}
if (_red.GetRasterColorInterpretation() == ColorInterp.GCI_RedBand)
{
result = ReadRgb(startRow, startColumn, numRows, numColumns, overview);
}
if (_red.GetRasterColorInterpretation() == ColorInterp.GCI_AlphaBand)
{
result = ReadArgb(startRow, startColumn, numRows, numColumns, overview);
}
return result;
}
/// <summary>
/// Attempts to open the specified file.
/// </summary>
public override void Open()
{
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());
}
}
_red = _dataset.GetRasterBand(1);
if (_red.GetRasterColorInterpretation() == ColorInterp.GCI_PaletteIndex)
{
ReadPaletteBuffered();
}
if (_red.GetRasterColorInterpretation() == ColorInterp.GCI_GrayIndex)
{
ReadGrayIndex();
}
if (_red.GetRasterColorInterpretation() == ColorInterp.GCI_RedBand)
{
ReadRGB();
}
if (_red.GetRasterColorInterpretation() == ColorInterp.GCI_AlphaBand)
{
ReadARGB();
}
}
/// <summary>
/// Attempts to open the specified file.
/// </summary>
public override void Open()
{
_dataset = Helpers.Open(Filename);
_red = _dataset.GetRasterBand(1);
if (_red.GetRasterColorInterpretation() == ColorInterp.GCI_PaletteIndex)
{
ReadPaletteBuffered();
}
if (_red.GetRasterColorInterpretation() == ColorInterp.GCI_GrayIndex)
{
ReadGrayIndex();
}
if (_red.GetRasterColorInterpretation() == ColorInterp.GCI_RedBand)
{
ReadRgb();
}
if (_red.GetRasterColorInterpretation() == ColorInterp.GCI_AlphaBand)
{
ReadArgb();
}
}
