private ICursor QueryGrid(int x, int y)
{
try
{
unsafe
{
var floatNodata = (float)_nodata;
fixed(float *buf = new float[2])
{
OSGeo_v1.GDAL.Band band = _gDS.GetRasterBand(1);
band.ReadRaster(x, y, 1, 1,
(IntPtr)buf,
1, 1, OSGeo_v1.GDAL.DataType.GDT_CFloat32, 4, 0);
if ((_hasNoDataVal != 0 && buf[0] == floatNodata) ||
(_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
{
}
}
public void ReleaseGridQuery()
{
if (_gridQueryBand != null)
{
_gridQueryBand.Dispose();
_gridQueryBand = null;
}
}
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 <ArgbColor> colors = new List <ArgbColor>();
for (int i = 1; i <= bandCount; ++i)
{
OSGeo_v1.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(ArgbColor.FromArgb(255, iColor, iColor, iColor));
}
break;
case ColorInterp.PaletteIndex:
tags = new string[tags.Length + 4];
values = new object[values.Length + 4];
OSGeo_v1.GDAL.ColorTable colTable = band.GetRasterColorTable();
if (colTable == null)
{
break;
}
int colCount = colTable.GetCount();
for (int iColor = 0; iColor < colCount; iColor++)
{
OSGeo_v1.GDAL.ColorEntry colEntry = colTable.GetColorEntry(iColor);
colors.Add(ArgbColor.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_v1.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)
{
ArgbColor 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 IRasterPaintContext PaintHillShade(int x, int y, int wWidth, int wHeight, int iWidth, int iHeight, double mag, ICancelTracker cancelTracker)
{
if (CancelTracker.Canceled(cancelTracker) || _gDS == null)
{
return(null);
}
int pixelSpace = 4;
using (var bitmap = GraphicsEngine.Current.Engine.CreateBitmap(iWidth, iHeight + 100, GraphicsEngine.PixelFormat.Rgba32))
{
var bitmapData = bitmap.LockBitmapPixelData(GraphicsEngine.BitmapLockMode.ReadWrite, GraphicsEngine.PixelFormat.Rgba32);
OSGeo_v1.GDAL.Band band = null;
try
{
int stride = bitmapData.Stride;
IntPtr buf = bitmapData.Scan0;
List <ArgbColor> colors = new List <ArgbColor>();
using (band = _gDS.GetRasterBand(1))
{
band.ReadRaster(x, y, wWidth, wHeight,
buf,
iWidth, iHeight, OSGeo_v1.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;
ArgbColor col = ArgbColor.White;
unsafe
{
byte * ptr = (byte *)(bitmapData.Scan0);
float *v = (float *)(bitmapData.Scan0);
float floatNodata = (float)_nodata;
for (int i = 0; i < iHeight; i++)
{
if (CancelTracker.Canceled(cancelTracker))
{
return(null);
}
for (int j = 0; j < iWidth; j++)
{
if ((_hasNoDataVal == 1 && *v == floatNodata) ||
(_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] = col.B; ptr[1] = col.G; ptr[2] = col.R;
ptr[3] = col.A; // alpha
}
else
{
double c1 = (j < iWidth - 1) ? (*(v + 1)) : c;
double c2 = (i < iHeight - 1) ? (*(v + rowStride)) : c;
c1 = ((_hasNoDataVal != 0 && c1 == floatNodata) ||
(_useIgnoreValue && c1 == _ignoreValue)) ? c : c1;
c2 = ((_hasNoDataVal != 0 && c2 == floatNodata) ||
(_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.UnlockBitmapPixelData(bitmapData);
bitmapData = null;
}
var contextBitmap = GraphicsEngine.Current.Engine.CreateBitmap(iWidth, iHeight, GraphicsEngine.PixelFormat.Rgba32);
using (var gr = contextBitmap.CreateCanvas())
{
gr.DrawBitmap(bitmap, new GraphicsEngine.CanvasPoint(0, 0));
}
return(new RasterPaintContext(contextBitmap));
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (bitmap != null && bitmapData != null)
{
bitmap.UnlockBitmapPixelData(bitmapData);
}
}
}
}
private IRasterPaintContext PaintGrid(int x, int y, int wWidth, int wHeight, int iWidth, int iHeight)
{
if (_gDS == null)
{
return(null);
}
int pixelSpace = 4;
using (var bitmap = GraphicsEngine.Current.Engine.CreateBitmap(iWidth, iHeight + 100, GraphicsEngine.PixelFormat.Rgba32))
{
var bitmapData = bitmap.LockBitmapPixelData(GraphicsEngine.BitmapLockMode.ReadWrite, GraphicsEngine.PixelFormat.Rgba32);
OSGeo_v1.GDAL.Band band = null;
try
{
int stride = bitmapData.Stride;
IntPtr buf = bitmapData.Scan0;
List <ArgbColor> colors = new List <ArgbColor>();
using (band = _gDS.GetRasterBand(1))
{
band.ReadRaster(x, y, wWidth, wHeight,
buf,
iWidth, iHeight, OSGeo_v1.GDAL.DataType.GDT_CFloat32, pixelSpace, stride);
band.Dispose();
}
unsafe
{
byte * ptr = (byte *)(bitmapData.Scan0);
float *v = (float *)(bitmapData.Scan0);
var floatNodata = (float)_nodata;
for (int i = 0; i < iHeight; i++)
{
for (int j = 0; j < iWidth; j++)
{
if (_renderRawGridValues)
{
if (_hasNoDataVal == 1 && *v == floatNodata)
{
ptr[0] = ptr[1] = ptr[2] = ptr[3] = 0;
}
else
{
var int24Bytes = new Int24(*v * 100f).GetBytes();
ptr[0] = int24Bytes[0];
ptr[1] = int24Bytes[1];
ptr[2] = int24Bytes[2];
ptr[3] = 255;
}
//byte* vb = (byte*)v;
//ptr[0] = *vb; vb++;
//ptr[1] = *vb; vb++;
//ptr[2] = *vb; vb++;
//ptr[3] = *vb;
}
else
{
if (_hasNoDataVal == 1 && *v == floatNodata)
{
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;
}
}
if (bitmap != null)
{
bitmap.UnlockBitmapPixelData(bitmapData);
bitmapData = null;
}
var contextBitmap = GraphicsEngine.Current.Engine.CreateBitmap(iWidth, iHeight, GraphicsEngine.PixelFormat.Rgba32);
using (var canvas = contextBitmap.CreateCanvas())
{
canvas.DrawBitmap(bitmap, new GraphicsEngine.CanvasPoint(0, 0));
}
return(new RasterPaintContext(contextBitmap));
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (bitmap != null && bitmapData != null)
{
bitmap.UnlockBitmapPixelData(bitmapData);
}
}
}
}
