private ICursor QueryGrid(int x, int y)
{
try
{
unsafe
{
fixed(float *buf = new float[2])
{
OSGeo.GDAL.Band band = _gDS.GetRasterBand(1);
band.ReadRaster(x, y, 1, 1,
(IntPtr)buf,
1, 1, OSGeo.GDAL.DataType.GDT_CFloat32, 4, 0);
if ((_hasNoDataVal != 0 && buf[0] == _nodata) ||
(_useIgnoreValue && buf[0] == _ignoreValue))
{
return(null);
}
string[] tags = { "ImageX", "ImageY", "band1" };
object[] values = { x, y, buf[0] };
band.Dispose();
return(new QueryCursor(tags, values));
}
}
}
finally
{
}
}
private static void BufferOnePixel(OSGeo.GDAL.Band TargetBand)
{
double[] readArr = new double[TargetBand.XSize];
TargetBand.ReadRaster(0, 1, TargetBand.XSize, 1, readArr, TargetBand.XSize, 1, 0, 0);
TargetBand.WriteRaster(0, 0, TargetBand.XSize, 1, readArr, TargetBand.XSize, 1, 0, 0);
TargetBand.ReadRaster(0, TargetBand.YSize - 2, TargetBand.XSize, 1, readArr, TargetBand.XSize, 1, 0, 0);
TargetBand.WriteRaster(0, TargetBand.YSize - 1, TargetBand.XSize, 1, readArr, TargetBand.XSize, 1, 0, 0);
readArr = new double[TargetBand.YSize];
TargetBand.ReadRaster(1, 0, 1, TargetBand.YSize, readArr, 1, TargetBand.YSize, 0, 0);
TargetBand.WriteRaster(0, 0, 1, TargetBand.YSize, readArr, 1, TargetBand.YSize, 0, 0);
TargetBand.ReadRaster(TargetBand.XSize - 2, 0, 1, TargetBand.YSize, readArr, 1, TargetBand.YSize, 0, 0);
TargetBand.WriteRaster(TargetBand.XSize - 1, 0, 1, TargetBand.YSize, readArr, 1, TargetBand.YSize, 0, 0);
}
public static void ReadDoubleBlock(OSGeo.GDAL.Band rasterBand,
BandBlock <double> block)
{
rasterBand.ReadRaster(block.XOffset, block.YOffset,
block.UsedPortionXSize, block.UsedPortionYSize,
block.Buffer,
block.UsedPortionXSize, block.UsedPortionYSize,
block.PixelSpace, block.LineSpace);
}
/// <summary>
/// 和GetData功能相同，但是使用GDAL直接从文件中读取数据。
/// </summary>
/// <param name="fileName">文件名字</param>
/// <param name="width">ref用于返回数据的宽度</param>
/// <param name="height">ref用于返回数据的高度</param>
/// <returns>一维数据数组,按行优先</returns>
private double[] GdalGetData(string fileName, ref int width, ref int height)
{
OSGeo.GDAL.Dataset dataset = OSGeo.GDAL.Gdal.Open(fileName, OSGeo.GDAL.Access.GA_ReadOnly);
width = dataset.RasterXSize;
height = dataset.RasterYSize;
double[] imageBuffer = new double[width * height];
OSGeo.GDAL.Band b = dataset.GetRasterBand(1);
b.ReadRaster(0, 0, width, height, imageBuffer, width, height, 0, 0);
return(imageBuffer);
}
public float GridQuery(gView.Framework.Carto.IDisplay display, IPoint point, ISpatialReference sRef)
{
TFWFile tfw = this.WorldFile as TFWFile;
if (tfw == null)
{
return((float)_nodata);
}
if (this.SpatialReference != null && sRef != null &&
!sRef.Equals(this.SpatialReference))
{
point = GeometricTransformer.Transform2D(point, sRef, this.SpatialReference) as IPoint;
}
if (point == null)
{
return((float)_nodata);
}
// Punkt transformieren -> Bild
vector2[] vecs = new vector2[1];
vecs[0] = new vector2(point.X, point.Y);
if (!tfw.ProjectInv(vecs))
{
return((float)_nodata);
}
if (vecs[0].x < 0 || vecs[0].x >= _iWidth ||
vecs[0].y < 0 || vecs[0].y >= _iHeight)
{
return((float)_nodata);
}
unsafe
{
fixed(float *buf = new float[2])
{
_gridQueryBand.ReadRaster((int)vecs[0].x, (int)vecs[0].y, 1, 1,
(IntPtr)buf,
1, 1, OSGeo.GDAL.DataType.GDT_CFloat32, 4, 0);
if ((_hasNoDataVal != 0 && buf[0] == _nodata) ||
(_useIgnoreValue && buf[0] == _ignoreValue))
{
return((float)_nodata);
}
return(buf[0]);
}
}
}
private void PaintWavelet(int x, int y, int wWidth, int wHeight, int iWidth, int iHeight, ICancelTracker cancelTracker)
{
if (CancelTracker.Canceled(cancelTracker) || _gDS == null)
{
return;
}
int pixelSpace = 3;
_bitmap = new Bitmap(iWidth, iHeight, PixelFormat.Format24bppRgb);
BitmapData bitmapData = _bitmap.LockBits(new Rectangle(0, 0, iWidth, iHeight), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
try
{
int stride = bitmapData.Stride;
IntPtr buf = bitmapData.Scan0;
for (int i = 1; i <= (_gDS.RasterCount > 3 ? 3 : _gDS.RasterCount); ++i)
{
using (OSGeo.GDAL.Band band = _gDS.GetRasterBand(i))
{
int ch = 0;
switch ((ColorInterp)band.GetRasterColorInterpretation())
{
case ColorInterp.BlueBand:
ch = 0;
break;
case ColorInterp.GreenBand:
ch = 1;
break;
case ColorInterp.RedBand:
ch = 2;
break;
}
band.ReadRaster(x, y, wWidth, wHeight,
new IntPtr(buf.ToInt64() + ch),
iWidth, iHeight, OSGeo.GDAL.DataType.GDT_Byte, pixelSpace, stride);
band.Dispose();
}
}
}
finally
{
if (_bitmap != null)
{
_bitmap.UnlockBits(bitmapData);
}
}
}
private ICursor QueryImage(int x, int y)
{
unsafe
{
int bandCount = _gDS.RasterCount;
string[] tags = new string[bandCount + 2];
object[] values = new object[bandCount + 2];
List <Color> colors = new List <Color>();
for (int i = 1; i <= bandCount; ++i)
{
OSGeo.GDAL.Band band = _gDS.GetRasterBand(i);
string bandName = "";
switch ((ColorInterp)band.GetRasterColorInterpretation())
{
case ColorInterp.BlueBand:
bandName = "(blue)";
break;
case ColorInterp.GreenBand:
bandName = "(green)";
break;
case ColorInterp.RedBand:
bandName = "(red)";
break;
case ColorInterp.GrayIndex:
for (int iColor = 0; iColor < 256; iColor++)
{
colors.Add(Color.FromArgb(255, iColor, iColor, iColor));
}
break;
case ColorInterp.PaletteIndex:
tags = new string[tags.Length + 4];
values = new object[values.Length + 4];
OSGeo.GDAL.ColorTable colTable = band.GetRasterColorTable();
if (colTable == null)
{
break;
}
int colCount = colTable.GetCount();
for (int iColor = 0; iColor < colCount; iColor++)
{
OSGeo.GDAL.ColorEntry colEntry = colTable.GetColorEntry(iColor);
colors.Add(Color.FromArgb(
colEntry.c4, colEntry.c1, colEntry.c2, colEntry.c3));
}
break;
}
int c = 0;
int *buf = &c;
band.ReadRaster(x, y, 1, 1,
(IntPtr)buf,
1, 1, OSGeo.GDAL.DataType.GDT_Int32, 4, 0);
band.Dispose();
tags[i + 1] = "Band " + i.ToString() + " " + bandName;
values[i + 1] = c;
if (colors.Count > 0 && c >= 0 && c < colors.Count)
{
Color col = colors[c];
tags[i + 2] = "Alpha";
values[i + 2] = col.A;
tags[i + 3] = "Red";
values[i + 3] = col.R;
tags[i + 4] = "Green";
values[i + 4] = col.G;
tags[i + 5] = "Blue";
values[i + 5] = col.B;
}
}
tags[0] = "ImageX"; values[0] = x;
tags[1] = "ImageY"; values[1] = y;
return(new QueryCursor(tags, values));
}
}
private void PaintHillShade(int x, int y, int wWidth, int wHeight, int iWidth, int iHeight, double mag, ICancelTracker cancelTracker)
{
if (CancelTracker.Canceled(cancelTracker) || _gDS == null)
{
return;
}
int pixelSpace = 4;
Bitmap bitmap = new Bitmap(iWidth, iHeight + 100, PixelFormat.Format32bppArgb);
BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, iWidth, iHeight + 100), ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
OSGeo.GDAL.Band band = null;
try
{
int stride = bitmapData.Stride;
IntPtr buf = bitmapData.Scan0;
List <Color> colors = new List <Color>();
using (band = _gDS.GetRasterBand(1))
{
band.ReadRaster(x, y, wWidth, wHeight,
buf,
iWidth, iHeight, OSGeo.GDAL.DataType.GDT_CFloat32, pixelSpace, stride);
band.Dispose();
}
double cx = _tfw.cellX / mag;
double cy = _tfw.cellY / mag;
Vector3d sun = new Vector3d(_hillShade);
sun.Normalize();
int rowStride = stride / pixelSpace;
Color col = Color.White;
unsafe
{
byte * ptr = (byte *)(bitmapData.Scan0);
float *v = (float *)(bitmapData.Scan0);
for (int i = 0; i < iHeight; i++)
{
if (CancelTracker.Canceled(cancelTracker))
{
return;
}
for (int j = 0; j < iWidth; j++)
{
if ((_hasNoDataVal == 1 && *v == _nodata) ||
(_useIgnoreValue && *v == _ignoreValue))
{
ptr[0] = ptr[1] = ptr[2] = ptr[3] = 0;
}
else
{
double c = *v;
col = GridColorClass.FindColor(c, _colorClasses);
if (!_useHillShade)
{
ptr[0] = (byte)col.B; ptr[1] = (byte)col.G; ptr[2] = (byte)col.R;
ptr[3] = (byte)col.A; // alpha
}
else
{
double c1 = (j < iWidth - 1) ? (*(v + 1)) : c;
double c2 = (i < iHeight - 1) ? (*(v + rowStride)) : c;
c1 = ((_hasNoDataVal != 0 && c1 == _nodata) ||
(_useIgnoreValue && c1 == _ignoreValue)) ? c : c1;
c2 = ((_hasNoDataVal != 0 && c2 == _nodata) ||
(_useIgnoreValue && c2 == _ignoreValue)) ? c : c2;
Vector3d v1 = new Vector3d(cx, 0.0, c1 - c); v1.Normalize();
Vector3d v2 = new Vector3d(0.0, -cy, c2 - c); v2.Normalize();
Vector3d vs = v2 % v1; vs.Normalize();
double h = Math.Min(Math.Max(0.0, sun * vs), 1.0);
//double h = Math.Abs(sun * vs);
double a = col.A;
double r = col.R * h;
double g = col.G * h;
double b = col.B * h;
ptr[0] = (byte)b; ptr[1] = (byte)g; ptr[2] = (byte)r;
ptr[3] = (byte)a; // alpha
}
}
ptr += pixelSpace;
v++;
}
ptr += bitmapData.Stride - (bitmapData.Width) * pixelSpace;
v = (float *)ptr;
}
}
if (bitmap != null)
{
bitmap.UnlockBits(bitmapData);
}
_bitmap = new Bitmap(iWidth, iHeight, PixelFormat.Format32bppArgb);
using (Graphics gr = Graphics.FromImage(_bitmap))
{
gr.DrawImage(bitmap, 0, 0);
}
}
catch { }
finally
{
if (bitmap != null)
{
bitmap.Dispose();
}
}
}
private void PaintGrid(int x, int y, int wWidth, int wHeight, int iWidth, int iHeight)
{
if (_gDS == null)
{
return;
}
int pixelSpace = 4;
_bitmap = new Bitmap(iWidth, iHeight, PixelFormat.Format32bppArgb);
BitmapData bitmapData = _bitmap.LockBits(new Rectangle(0, 0, iWidth, iHeight), ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
OSGeo.GDAL.Band band = null;
try
{
int stride = bitmapData.Stride;
IntPtr buf = bitmapData.Scan0;
List <Color> colors = new List <Color>();
using (band = _gDS.GetRasterBand(1))
{
band.ReadRaster(x, y, wWidth, wHeight,
buf,
iWidth, iHeight, OSGeo.GDAL.DataType.GDT_CFloat32, pixelSpace, stride);
band.Dispose();
}
unsafe
{
byte * ptr = (byte *)(bitmapData.Scan0);
float *v = (float *)(bitmapData.Scan0);
for (int i = 0; i < bitmapData.Height; i++)
{
for (int j = 0; j < bitmapData.Width; j++)
{
if (_renderRawGridValues)
{
byte *vb = (byte *)v;
ptr[0] = 111; // *vb; vb++;
ptr[1] = 122; // *vb; vb++;
ptr[2] = 133; // *vb; vb++;
ptr[3] = 144; // *vb;
}
else
{
if (_hasNoDataVal == 1 && *v == _nodata)
{
ptr[0] = ptr[1] = ptr[2] = ptr[3] = 0;
}
else
{
double c = (*v - _min) / (_max - _min);
double a = _minColor.A + c * (_maxColor.A - _minColor.A);
double r = _minColor.R + c * (_maxColor.R - _minColor.R);
double g = _minColor.G + c * (_maxColor.G - _minColor.G);
double b = _minColor.B + c * (_maxColor.B - _minColor.B);
ptr[0] = (byte)b; ptr[1] = (byte)g; ptr[2] = (byte)r;
ptr[3] = (byte)a; // alpha
}
}
ptr += pixelSpace;
v++;
}
ptr += bitmapData.Stride - bitmapData.Width * pixelSpace;
v = (float *)ptr;
}
}
}
finally
{
if (_bitmap != null)
{
_bitmap.UnlockBits(bitmapData);
}
}
}
private void PaintImage(int x, int y, int wWidth, int wHeight, int iWidth, int iHeight, ICancelTracker cancelTracker)
{
if (CancelTracker.Canceled(cancelTracker) || _gDS == null)
{
return;
}
int pixelSpace = 3;
_bitmap = new Bitmap(iWidth, iHeight, PixelFormat.Format24bppRgb);
BitmapData bitmapData = _bitmap.LockBits(new Rectangle(0, 0, iWidth, iHeight), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
try
{
int stride = bitmapData.Stride;
IntPtr buf = bitmapData.Scan0;
List <Color> colors = new List <Color>();
for (int i = 1; i <= (_gDS.RasterCount > 3 ? 3 : _gDS.RasterCount); ++i)
{
using (OSGeo.GDAL.Band band = _gDS.GetRasterBand(i))
{
int ch = 0;
switch ((ColorInterp)band.GetRasterColorInterpretation())
{
case ColorInterp.BlueBand:
ch = 0;
break;
case ColorInterp.GreenBand:
ch = 1;
break;
case ColorInterp.RedBand:
ch = 2;
break;
case ColorInterp.GrayIndex:
for (int iColor = 0; iColor < 256; iColor++)
{
colors.Add(Color.FromArgb(255, iColor, iColor, iColor));
}
break;
case ColorInterp.PaletteIndex:
OSGeo.GDAL.ColorTable colTable = band.GetRasterColorTable();
if (colTable == null)
{
break;
}
int colCount = colTable.GetCount();
for (int iColor = 0; iColor < colCount; iColor++)
{
OSGeo.GDAL.ColorEntry colEntry = colTable.GetColorEntry(iColor);
colors.Add(Color.FromArgb(
colEntry.c4, colEntry.c1, colEntry.c2, colEntry.c3));
}
break;
}
band.ReadRaster(x, y, wWidth, wHeight,
new IntPtr(buf.ToInt64() + ch),
iWidth, iHeight, OSGeo.GDAL.DataType.GDT_Byte, pixelSpace, stride);
band.Dispose();
}
}
if (colors.Count > 0)
{
unsafe
{
byte *ptr = (byte *)(bitmapData.Scan0);
for (int i = 0; i < bitmapData.Height; i++)
{
if (CancelTracker.Canceled(cancelTracker))
{
return;
}
for (int j = 0; j < bitmapData.Width; j++)
{
// write the logic implementation here
byte c = ptr[0];
Color col = colors[(int)c];
ptr[0] = col.B;
ptr[1] = col.G;
ptr[2] = col.R;
ptr += pixelSpace;
}
ptr += bitmapData.Stride - bitmapData.Width * pixelSpace;
}
}
}
}
catch (Exception ex)
{
string msg = ex.Message;
}
finally
{
if (_bitmap != null)
{
_bitmap.UnlockBits(bitmapData);
}
}
}
private void GetPreview(OSGeo.GDAL.Dataset dataset, System.Drawing.Size size, Graphics g, SharpMap.Geometries.BoundingBox bbox)
{
double[] geoTrans = new double[6];
dataset.GetGeoTransform(geoTrans);
GeoTransform GT = new GeoTransform(geoTrans);
int DsWidth = dataset.RasterXSize;
int DsHeight = dataset.RasterYSize;
Bitmap bitmap = new Bitmap(size.Width, size.Height, PixelFormat.Format24bppRgb);
int iPixelSize = 3; //Format24bppRgb = byte[b,g,r]
if (dataset != null)
{
/*
* if ((float)size.Width / (float)size.Height > (float)DsWidth / (float)DsHeight)
* size.Width = size.Height * DsWidth / DsHeight;
* else
* size.Height = size.Width * DsHeight / DsWidth;
*/
double left = Math.Max(bbox.Left, _Envelope.Left);
double top = Math.Min(bbox.Top, _Envelope.Top);
double right = Math.Min(bbox.Right, _Envelope.Right);
double bottom = Math.Max(bbox.Bottom, _Envelope.Bottom);
int x1 = (int)GT.PixelX(left);
int y1 = (int)GT.PixelY(top);
int x1width = (int)GT.PixelXwidth(right - left);
int y1height = (int)GT.PixelYwidth(bottom - top);
bitmap = new Bitmap(size.Width, size.Height, PixelFormat.Format24bppRgb);
BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, size.Width, size.Height), ImageLockMode.ReadWrite, bitmap.PixelFormat);
try
{
unsafe
{
for (int i = 1; i <= (dataset.RasterCount > 3 ? 3 : dataset.RasterCount); ++i)
{
byte[] buffer = new byte[size.Width * size.Height];
OSGeo.GDAL.Band band = dataset.GetRasterBand(i);
//band.ReadRaster(x1, y1, x1width, y1height, buffer, size.Width, size.Height, (int)GT.HorizontalPixelResolution, (int)GT.VerticalPixelResolution);
band.ReadRaster(x1, y1, x1width, y1height, buffer, size.Width, size.Height, 0, 0);
int p_indx = 0;
int ch = 0;
//#warning Check correspondance between enum and integer values
if (band.GetRasterColorInterpretation() == OSGeo.GDAL.ColorInterp.GCI_BlueBand)
{
ch = 0;
}
if (band.GetRasterColorInterpretation() == OSGeo.GDAL.ColorInterp.GCI_GreenBand)
{
ch = 1;
}
if (band.GetRasterColorInterpretation() == OSGeo.GDAL.ColorInterp.GCI_RedBand)
{
ch = 2;
}
if (band.GetRasterColorInterpretation() != OSGeo.GDAL.ColorInterp.GCI_PaletteIndex)
{
for (int y = 0; y < size.Height; y++)
{
byte *row = (byte *)bitmapData.Scan0 + (y * bitmapData.Stride);
for (int x = 0; x < size.Width; x++, p_indx++)
{
row[x * iPixelSize + ch] = buffer[p_indx];
}
}
}
else //8bit Grayscale
{
for (int y = 0; y < size.Height; y++)
{
byte *row = (byte *)bitmapData.Scan0 + (y * bitmapData.Stride);
for (int x = 0; x < size.Width; x++, p_indx++)
{
row[x * iPixelSize] = buffer[p_indx];
row[x * iPixelSize + 1] = buffer[p_indx];
row[x * iPixelSize + 2] = buffer[p_indx];
}
}
}
}
}
}
finally
{
bitmap.UnlockBits(bitmapData);
}
}
g.DrawImage(bitmap, new System.Drawing.Point(0, 0));
}
/// <summary>
/// 波段直方图匹配。
/// </summary>
/// <param name="InputBand">输入的波段。</param>
/// <param name="MatchBand">要匹配到的波段。</param>
/// <param name="InputCumu">输入的数据集的累积概率表。</param>
/// <param name="MatchingCumu">要匹配到的数据集的累积概率表。</param>
/// <param name="OutDataType">输出的数据类型。</param>
/// <returns>操作成功或失败。</returns>
public static OSGeo.GDAL.Band HistogramMatching(OSGeo.GDAL.Band InputBand, OSGeo.GDAL.Band MatchBand, double[] InputCumu, double[] MatchingCumu, OSGeo.GDAL.DataType OutDataType)
{
try
{
int[] LUT = HistogramMatching(InputCumu, MatchingCumu); //进行波段直方图匹配。
int xSize = InputBand.XSize;
int ySize = InputBand.YSize;
OSGeo.GDAL.Driver Dri = OSGeo.GDAL.Gdal.GetDriverByName("Gtiff");
if (Dri == null)
{
throw new Exception("无法获取GDAL Driver。");
}
string tmpFileName = Tools.Common.GetTempFileName();
FrmProgress FP = new FrmProgress()
{
Text = "正在进行波段直方图匹配...",
CanCancel = false,
};
Thread t = new Thread(() =>
{
FP.ShowDialog();
});
t.SetApartmentState(ApartmentState.STA);
t.Start();
OSGeo.GDAL.Dataset DS = Dri.Create(tmpFileName, xSize, ySize, 1, OutDataType, null);
FP.Output("已创建临时输出数据集\"" + tmpFileName + "\"");
Tools.Common.GetMinimum(InputBand, out double inputBandMin);
Tools.Common.GetMinimum(MatchBand, out double matchBandMin);
for (int Row = 0; Row < ySize; Row++)
{
FP.SetProgress1("正在处理：", Row + 1, ySize, "行");
double[] Values = new double[xSize];
//读取DN到数组
InputBand.ReadRaster(0, Row, xSize, 1, Values, xSize, 1, 0, 0);
for (int Col = 0; Col < xSize; Col++)
{
//防止GDAL自带方法算出的统计数据越界。
if ((Values[Col] - inputBandMin) <= 0)
{
Values[Col] = matchBandMin + LUT[0];
continue;
}
if ((Values[Col] - inputBandMin) >= LUT.Length - 1)
{
Values[Col] = matchBandMin + LUT[LUT.Length - 1];
continue;
}
Values[Col] = matchBandMin + LUT[(int)(Values[Col] - inputBandMin)];
}
//写结果到新栅格
DS.GetRasterBand(1).WriteRaster(0, Row, xSize, 1, Values, xSize, 1, 0, 0);
DS.FlushCache();
Thread.Sleep(1);
if (FP.Canceled)
{
Thread.Sleep(500);
FP.Finish();
throw new OperationCanceledException("操作被用户取消。");
}
}
FP.Finish();
Dri.Dispose();
return(DS.GetRasterBand(1));
}
catch (Exception err)
{
MessageBox.Show(err.ToString());
return(null);
}
}