public System.Drawing.Rectangle GetRasterRect()
{
IRasterDrawing rst = _canvas.PrimaryDrawObject as IRasterDrawing;
if (rst == null)
{
return(Rectangle.Empty);
}
GeoDo.RSS.Core.DrawEngine.CoordEnvelope retRect = null;
foreach (object obj in _aoiContainer.AOIs)
{
GeoDo.RSS.Core.DrawEngine.CoordEnvelope rect = null;
if (obj is GeometryOfDrawed)
{
rect = GetRasterRect(obj as GeometryOfDrawed);
}
else if (obj is Feature)
{
rect = GetRasterRect(obj as Feature);
}
if (rect == null)
{
continue;
}
if (retRect == null)
{
retRect = rect;
}
else
{
retRect = retRect.Union(rect);
}
}
return(new Rectangle((int)retRect.MinX, (int)retRect.MinY, (int)retRect.Width, (int)retRect.Height));
}
//获取多个aoi的外接矩形
private GeoDo.RSS.Core.DrawEngine.CoordEnvelope GetGeoRect()
{
GeoDo.RSS.Core.DrawEngine.CoordEnvelope retRect = null;
foreach (object obj in _aoiContainer.AOIs)
{
string name;
GeoDo.RSS.Core.DrawEngine.CoordEnvelope rect = null;
rect = GetGeoRect(obj as Feature, out name);
if (rect == null)
{
continue;
}
if (retRect == null)
{
retRect = rect;
}
else
{
retRect = retRect.Union(rect);
}
}
return(retRect);
}
public GeoDo.RSS.Core.DrawEngine.CoordEnvelope GetGeoRect()
{
IRasterDrawing rst = _canvas.PrimaryDrawObject as IRasterDrawing;
if (rst == null)
{
return(null);
}
GeoDo.RSS.Core.DrawEngine.CoordEnvelope retRect = null;
foreach (object obj in _aoiContainer.AOIs)
{
string name;
GeoDo.RSS.Core.DrawEngine.CoordEnvelope rect = null;
if (obj is GeometryOfDrawed)
{
rect = GetGeoRect(obj as GeometryOfDrawed);
}
else if (obj is Feature)
{
rect = GetGeoRect(obj as Feature, out name);
}
if (rect == null)
{
continue;
}
if (retRect == null)
{
retRect = rect;
}
else
{
retRect = retRect.Union(rect);
}
}
return(retRect);
}
private static BitmapObject[] GetBitmapObjects(string[] fnames, int maxSize, ICanvas canvas, out Size bmpSize,
out Size dataSize, out GeoDo.RSS.Core.DrawEngine.CoordEnvelope viewPrjEvp,
out GeoDo.RSS.Core.DF.CoordEnvelope viewGeoEvp,
out float resolution)
{
bmpSize = Size.Empty;
dataSize = new Size();
viewPrjEvp = null;
viewGeoEvp = null;
resolution = 0;
List <BitmapObject> bmpObjs = new List <BitmapObject>();
BitmapObject bmpO;
GeoDo.RSS.Core.DrawEngine.CoordEnvelope drawEvp = null;
bool isFirst = true;
foreach (string fname in fnames)
{
if (!File.Exists(fname))
{
continue;
}
using (IRasterDataProvider prd = GeoDataDriver.Open(fname) as IRasterDataProvider)
{
IOverviewGenerator ov = prd as IOverviewGenerator;
bmpSize = ov.ComputeSize(maxSize);
Bitmap bmp = new Bitmap(bmpSize.Width, bmpSize.Height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
RasterIdentify identify = new RasterIdentify(fname);
object[] sts = GetColorTableFunc(prd, identify.ProductIdentify, identify.SubProductIdentify);
if (sts != null)
{
ov.Generate(new int[] { 1, 1, 1 }, sts, ref bmp);
}
else
{
int[] bands = prd.GetDefaultBands();
if (bands == null || bands.Length == 0)
{
return(null);
}
ov.Generate(bands, ref bmp);
}
drawEvp = GetDrawingEnvelop(canvas, prd);
if (isFirst)
{
viewPrjEvp = drawEvp;
ICoordinateTransform tans = canvas.CoordTransform;
viewGeoEvp = PrjToGeoCoordEvp(viewPrjEvp, tans);
resolution = prd.ResolutionX;
dataSize = GetMaxDataSize(canvas, viewPrjEvp, prd, out viewGeoEvp);
isFirst = false;
}
else
{
viewPrjEvp = viewPrjEvp.Union(drawEvp);
dataSize = GetMaxDataSize(canvas, viewPrjEvp, prd, out viewGeoEvp);
//如果分辩率不相等则取最大的分辨率
if (resolution < prd.ResolutionX)
{
resolution = prd.ResolutionX;
}
}
bmpO = new BitmapObject(bmp, drawEvp);
bmpObjs.Add(bmpO);
}
}
return(bmpObjs.Count != 0 ? bmpObjs.ToArray() : null);
}
