/// <summary>
/// Render the full raster block by block, and then save the values to the pyramid raster.
/// This will probably be nasty and time consuming, but what can you do.
/// </summary>
/// <param name="pyrFile">File name of the file the pyramid image should be saved to.</param>
/// <param name="progressHandler">The progress handler.</param>
/// <returns>The created pyramid image.</returns>
public IImageData CreatePyramidImage(string pyrFile, IProgressHandler progressHandler)
{
PyramidImage py = new(pyrFile, DataSet.Bounds);
int width = DataSet.Bounds.NumColumns;
int blockHeight = 32000000 / width;
if (blockHeight > DataSet.Bounds.NumRows)
{
blockHeight = DataSet.Bounds.NumRows;
}
int numBlocks = (int)Math.Ceiling(DataSet.Bounds.NumRows / (double)blockHeight);
int count = DataSet.NumRows;
if (_symbolizer.ShadedRelief.IsUsed)
{
count *= 2;
}
ProgressMeter pm = new(progressHandler, "Creating Pyramids", count);
PerformanceCounter pcRemaining = new("Memory", "Available Bytes");
Process proc = Process.GetCurrentProcess();
for (int j = 0; j < numBlocks; j++)
{
int h = blockHeight;
if (j == numBlocks - 1)
{
h = DataSet.Bounds.NumRows - (j * blockHeight);
}
#if DEBUG
var mem = proc.PrivateMemorySize64 / 1000000;
var freeRam = Convert.ToInt64(pcRemaining.NextValue()) / 1000000;
Debug.WriteLine("Memory before: " + mem + ", " + freeRam + " remaining.");
#endif
pm.BaseMessage = "Reading from Raster";
pm.SendProgress();
using (IRaster r = DataSet.ReadBlock(0, j * blockHeight, width, h))
{
byte[] vals = new byte[h * 4 * width];
r.DrawToBitmap(Symbolizer, vals, width * 4, pm);
pm.BaseMessage = "Writing to Pyramids";
pm.SendProgress();
py.WriteWindow(vals, j * blockHeight, 0, h, width, 0);
Symbolizer.HillShade = null;
}
#if DEBUG
mem = proc.PrivateMemorySize64 / 1000000;
freeRam = Convert.ToInt64(pcRemaining.NextValue()) / 1000000;
Debug.WriteLine("Memory after: " + mem + "Mb | " + freeRam + " remaining Mb.");
#endif
}
pm.Reset();
py.ProgressHandler = ProgressHandler;
py.CreatePyramids();
py.WriteHeader(pyrFile);
return(py);
}
/// <summary>
/// Creates a bmp from the in-memory portion of the raster. This will be stored as a
/// fileName with the same name as the current raster, but ends in bmp.
/// </summary>
/// <returns>The created bmp.</returns>
public Bitmap CreateBitmap()
{
string fileName = Path.ChangeExtension(_raster.Filename, ".bmp");
Bitmap bmp = new Bitmap(_raster.NumRows, _raster.NumColumns, PixelFormat.Format32bppArgb);
bmp.Save(fileName); // this is needed so that lockbits doesn't cause exceptions
_raster.DrawToBitmap(this, bmp);
bmp.Save(fileName);
return(bmp);
}