private void ReadARGB()
{
if (_dataset.RasterCount < 4)
{
throw new GdalException("ARGB Format was indicated but there are only " + _dataset.RasterCount + " bands!");
}
_alpha = _red;
_red = _dataset.GetRasterBand(2);
_green = _dataset.GetRasterBand(3);
_blue = _dataset.GetRasterBand(4);
int tw = TileCollection.TileWidth;
int th = TileCollection.TileHeight;
for (int row = 0; row < TileCollection.NumTilesTall(); row++)
{
for (int col = 0; col < TileCollection.NumTilesWide(); col++)
{
int width = TileCollection.GetTileWidth(col);
int height = TileCollection.GetTileHeight(row);
MWImageData id = new MWImageData(width, height);
Bitmap image = new Bitmap(width, height, PixelFormat.Format32bppArgb);
byte[] red = new byte[width * height];
byte[] g = new byte[width * height];
byte[] b = new byte[width * height];
byte[] a = new byte[width * height];
_red.ReadRaster(col * tw, row * th, width, height, red, width, height, 0, 0);
_green.ReadRaster(col * tw, row * th, width, height, g, width, height, 0, 0);
_blue.ReadRaster(col * tw, row * th, width, height, b, width, height, 0, 0);
_alpha.ReadRaster(col * tw, row * th, width, height, a, width, height, 0, 0);
BitmapData bData = image.LockBits(new Rectangle(0, 0, Width, Height), ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
Stride = bData.Stride;
image.UnlockBits(bData);
byte[] vals = new byte[Width * Height * 4];
int stride = Stride;
const int bpp = 4;
for (int r = 0; r < height; r++)
{
for (int c = 0; c < width; c++)
{
vals[r * stride + c * bpp] = b[r * width + c];
vals[r * stride + c * bpp + 1] = g[r * width + c];
vals[r * stride + c * bpp + 2] = red[r * width + c];
vals[r * stride + c * bpp + 3] = a[r * width + c];
}
}
id.Values = vals;
id.WriteBytes();
TileCollection.Tiles[row, col] = id;
}
}
SetTileBounds(Bounds.AffineCoefficients);
}
private void ReadGrayIndex()
{
int tw = TileCollection.TileWidth;
int th = TileCollection.TileHeight;
for (int row = 0; row < TileCollection.NumTilesTall(); row++)
{
for (int col = 0; col < TileCollection.NumTilesWide(); col++)
{
int width = TileCollection.GetTileWidth(col);
int height = TileCollection.GetTileHeight(row);
MWImageData id = new MWImageData(width, height);
byte[] red = new byte[width * height];
_red.ReadRaster(col * tw, row * th, width, height, red, width, height, 0, 0);
Bitmap image = new Bitmap(width, height);
BitmapData bData = image.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
Stride = bData.Stride;
image.UnlockBits(bData);
byte[] vals = new byte[width*height*4];
int stride = Stride;
const int bpp = 4;
for (int r = 0; r < height; r++)
{
for (int c = 0; c < width; c++)
{
vals[r*stride + c*bpp] = red[r*width + c];
vals[r*stride + c*bpp + 1] = red[r*width + c];
vals[r*stride + c*bpp + 2] = red[r*width + c];
vals[r*stride + c*bpp + 3] = 255;
}
}
id.Values = vals;
id.WriteBytes();
TileCollection.Tiles[row, col] = id;
}
}
SetTileBounds(Bounds.AffineCoefficients);
}