public void Save(int xoff, int yoff, int buf_xsize, int buf_ysize, double[] buffer)
{
try
{
OSGeo.GDAL.Gdal.AllRegister();
_dataSet = OSGeo.GDAL.Gdal.Open(_fileName, OSGeo.GDAL.Access.GA_Update);
_band1 = _dataSet.GetRasterBand(1);
CPLErr err1 = _band1.WriteRaster(xoff,
yoff,
_resultInfo.Width,
buf_ysize,
buffer,
buf_xsize,
buf_ysize,
0,
0);
_dataSet.Dispose();
_band1.Dispose();
}
catch (Exception ex)
{
throw new Exception("数据写入失败。" + ex.Message);
}
}
/// <summary>
/// 数据保存
/// </summary>
public void Save()
{
try
{
OSGeo.GDAL.Gdal.AllRegister();
_dataSet = OSGeo.GDAL.Gdal.Open(_fileName, OSGeo.GDAL.Access.GA_Update);
_band1 = _dataSet.GetRasterBand(1);
CPLErr err1 = _band1.WriteRaster(0,
0,
_resultInfo.Width,
_resultInfo.Height,
_pixels1,
_resultInfo.Width,
_resultInfo.Height,
0,
0);
_dataSet.Dispose();
_band1.Dispose();
}
catch (Exception ex)
{
throw new Exception("数据写入失败。" + ex.Message);
}
}
private static void WriteGrayIndex(Bitmap value, int xOffset, int yOffset, Band first)
{
int width = value.Width;
int height = value.Height;
BitmapData bData = value.LockBits(new Rectangle(0, 0, width, height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
int stride = Math.Abs(bData.Stride);
byte[] r = new byte[stride * height * 4];
Marshal.Copy(bData.Scan0, r, 0, r.Length);
byte[] vals = new byte[height * stride];
for (int row = 0; row < height; row++)
{
for (int col = 0; col < width; col++)
{
byte blue = r[row * stride + col * 4];
byte green = r[row * stride + col * 4 + 1];
byte red = r[row * stride + col * 4 + 2];
int gray = Convert.ToInt32(.3 * red + .59 * green + .11 * blue);
if (gray > 255) gray = 255;
if (gray < 0) gray = 0;
vals[row * width + col] = Convert.ToByte(gray);
}
}
first.WriteRaster(xOffset, yOffset, width, height, vals, width, height, 0, 0);
}
private static void WriteRgb(Bitmap value, int xOffset, int yOffset, Band first, Dataset set)
{
if (set.RasterCount < 3)
{
throw new GdalException(
"RGB Format was indicated but there are only " +
set.RasterCount +
" bands!");
}
int width = value.Width;
int height = value.Height;
BitmapData bData = value.LockBits(new Rectangle(0, 0, width, height),
ImageLockMode.ReadWrite,
PixelFormat.Format24bppRgb);
int stride = Math.Abs(bData.Stride);
byte[] vals = new byte[stride * height];
Marshal.Copy(bData.Scan0, vals, 0, vals.Length);
value.UnlockBits(bData);
byte[] r = new byte[width * height];
byte[] g = new byte[width * height];
byte[] b = new byte[width * height];
for (int row = 0; row < height; row++)
{
for (int col = 0; col < width; col++)
{
b[row * width + col] = vals[row * stride + col * 4];
g[row * width + col] = vals[row * stride + col * 4 + 1];
r[row * width + col] = vals[row * stride + col * 4 + 2];
}
}
Band green = set.GetRasterBand(2);
Band blue = set.GetRasterBand(3);
first.WriteRaster(xOffset, yOffset, width, height, r, width, height, 0, 0);
first.FlushCache();
green.WriteRaster(xOffset, yOffset, width, height, g, width, height, 0, 0);
green.FlushCache();
blue.WriteRaster(xOffset, yOffset, width, height, b, width, height, 0, 0);
blue.FlushCache();
// first disposed in caller
green.Dispose();
blue.Dispose();
}
private static void WritePaletteBuffered(Bitmap value, int xOffset, int yOffset, Band first)
{
ColorTable ct = first.GetRasterColorTable();
if (ct == null)
{
throw new GdalException("Image was stored with a palette interpretation but has no color table.");
}
if (ct.GetPaletteInterpretation() != PaletteInterp.GPI_RGB)
{
throw new GdalException("Only RGB palette interpretation is currently supported by this " +
" plug-in, " + ct.GetPaletteInterpretation() + " is not supported.");
}
int width = value.Width;
int height = value.Height;
BitmapData bData = value.LockBits(new Rectangle(0, 0, width, height),
ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
int stride = Math.Abs(bData.Stride);
byte[] r = new byte[stride * height];
Marshal.Copy(bData.Scan0, r, 0, r.Length);
value.UnlockBits(bData);
byte[] vals = new byte[width * height];
byte[][] colorTable = new byte[ct.GetCount()][];
for (int i = 0; i < ct.GetCount(); i++)
{
ColorEntry ce = ct.GetColorEntry(i);
colorTable[i] = new[]
{
(byte) ce.c3, (byte) ce.c2, (byte) ce.c1,
(byte) ce.c4
};
}
for (int row = 0; row < height; row++)
{
for (int col = 0; col < width; col++)
{
vals[row * width + col] = MatchColor(r, row * stride + col * 4, colorTable);
}
}
first.WriteRaster(xOffset, yOffset, width, height, vals, width, height, 0, 0);
}
