private void _WriteTiles(int Level, int idOverview, KMLBuildOptions options)
{
int nTileX = 0, nTileY = 0, nPixelRemTileX, nPixelRemTileY;
// nTile -> number of tile with value
// nPixelRemTileX -> Remainder pixel before nTile
if (idOverview == -1) // Original
{
nTileX = Math.DivRem(_ds.RasterXSize, options.TileSize, out nPixelRemTileX);
nTileY = Math.DivRem(_ds.RasterYSize, options.TileSize, out nPixelRemTileY);
}
else
{
nTileX = Math.DivRem(_ds.GetRasterBand(1).GetOverview(idOverview).XSize, options.TileSize, out nPixelRemTileX);
nTileY = Math.DivRem(_ds.GetRasterBand(1).GetOverview(idOverview).YSize, options.TileSize, out nPixelRemTileY);
}
options.ShowStatus(string.Format("Level {0} TileX 0->{1} TileY 0->{2} ...", Level, nTileX, nTileY));
options.Progressed(0, nTileX, 1, 0);
// Pixels with full values in TileSize
for (int idGridX = 0; idGridX < nTileX; idGridX++)
{
options.Progressed(0, 0, 0, idGridX);
for (int idGridY = 0; idGridY < nTileY; idGridY++)
{
WriteTileEach(Level, idOverview, idGridX, idGridY, options.TileSize, options.TileSize, options);
}
}
// Pixels without full values in TileSize
if (nPixelRemTileX > 0)
{
options.ShowStatus(string.Format("Level {0} Remainder TileX 0->{1} ...", Level, nTileY));
options.Progressed(0, nTileY, 1, 0);
for (int idGridY = 0; idGridY < nTileY; idGridY++)
{
options.Progressed(0, 0, 0, idGridY);
WriteTileEach(Level, idOverview, nTileX, idGridY, nPixelRemTileX, options.TileSize, options);
}
}
if (nPixelRemTileY > 0)
{
options.ShowStatus(string.Format("Level {0} Remainder TileY 0->{1} ...", Level, nTileX));
options.Progressed(0, nTileX, 1, 0);
for (int idGridX = 0; idGridX < nTileX; idGridX++)
{
options.Progressed(0, 0, 0, idGridX);
WriteTileEach(Level, idOverview, idGridX, nTileY, options.TileSize, nPixelRemTileY, options);
}
}
if (nPixelRemTileX > 0 && nPixelRemTileY > 0)
{
options.ShowStatus("Remainder TileX & TileY ...");
WriteTileEach(Level, idOverview, nTileX, nTileY, nPixelRemTileX, nPixelRemTileY, options);
}
}
public void Write(KMLBuildOptions options)
{
int nLevel = GlobalMercator.GetTotalLevel(options.TileSize, _ds.RasterXSize, _ds.RasterYSize);
_SetOverviewSameLevel(nLevel);
// Original: idOverview = -1 and Level is Max
_WriteTiles(nLevel, -1, options);
// int Level, int idOverview, int[] Order, int SizeTile, string sNameDirTile
// Next Levels
for (int i = 0; i < nLevel; i++)
{
_WriteTiles(nLevel - (i + 1), i, options);
}
}
private void WriteTileEachDS(int idOverview, ref Dataset dsOut, int xoff, int yoff, int xsize, int ysize, KMLBuildOptions options)
{
byte[] pixelsTile = new byte[options.TileSize * options.TileSize];
byte[] pixelsAlpha = new byte[0];
if (options.HaveAlphaBand)
{
pixelsAlpha = null;
pixelsAlpha = new byte[options.TileSize * options.TileSize];
}
int idOrder = 0;
for (int id = 0; id < _ds.RasterCount; id++)
{
Band bdOut = dsOut.GetRasterBand(id + 1);
idOrder = options.HaveBandsOrder ? options.BandsOrder[id] : id + 1;
Band bdIn = (idOverview != -1) ? _ds.GetRasterBand(idOrder).GetOverview(idOverview) : _ds.GetRasterBand(idOrder);
if (xsize == options.TileSize)
{
bdIn.ReadRaster(xoff, yoff, xsize, ysize, pixelsTile, xsize, ysize, 0, 0);
if (options.HaveStretchStardDesv)
{
ImageProcessing.SetStretchStardDevi(bdIn, ref pixelsTile, options.StretchStardDesvNum);
}
}
else
{
byte[] pixels = new byte[xsize * ysize];
bdIn.ReadRaster(xoff, yoff, xsize, ysize, pixels, xsize, ysize, 0, 0);
if (options.HaveStretchStardDesv)
{
ImageProcessing.SetStretchStardDevi(bdIn, ref pixels, options.StretchStardDesvNum);
}
for (int iy = 0; iy < ysize; iy++)
{
System.Buffer.BlockCopy(pixels, iy * xsize, pixelsTile, iy * options.TileSize, xsize);
}
}
bdOut.WriteRaster(0, 0, options.TileSize, options.TileSize, pixelsTile, options.TileSize, options.TileSize, 0, 0);
if (options.HaveAlphaBand)
{
ImageProcessing.PopulateAlphaPixels(ref pixelsTile, ref pixelsAlpha);
}
bdOut.FlushCache(); bdIn.FlushCache();
bdIn.Dispose(); bdOut.Dispose();
}
if (options.HaveAlphaBand)
{
Band bdAlpha = dsOut.GetRasterBand(_ds.RasterCount + 1);
bdAlpha.WriteRaster(0, 0, options.TileSize, options.TileSize, pixelsAlpha, options.TileSize, options.TileSize, 0, 0);
bdAlpha.FlushCache();
bdAlpha.Dispose();
}
}
private void WriteTileEach(int Level, int idOverview, int idGridX, int idGridY, int nPixelX, int nPixelY, KMLBuildOptions options)
{
int xoff = idGridX * options.TileSize;
int yoff = idGridY * options.TileSize;
Dataset dsOut = CreatePngDataset(idOverview, xoff, yoff, options.TileSize, options.HaveAlphaBand);
WriteTileEachDS(idOverview, ref dsOut, xoff, yoff, nPixelX, nPixelY, options);
if (options.HaveNullData)
{
_SetNullDataImage(dsOut, options.NullDataValue);
}
// Tiles: sPath\$[level]_$[y]_$[x].png
string sPathNameTile = string.Format("{0}\\{1}_{2}_{3}.png", options.OutPath, Level, idGridX, idGridY);
_DatasetPng2File(dsOut, sPathNameTile);
dsOut.FlushCache();
dsOut.Dispose();
}