Size IOverviewGenerator.ComputeSize(int maxSize)
{
TryCreateOverviewGenerator();
if (_overviewGenerator != null)
{
return(_overviewGenerator.ComputeSize(maxSize));
}
return(Size.Empty);
}
private static Bitmap GenerateOverview(IRasterDataProvider prd, int[] bandNos, int maxSize)
{
CoordEnvelope env = prd.CoordEnvelope;
IOverviewGenerator v = prd as IOverviewGenerator;
Size size = v.ComputeSize(maxSize);//缩略图最大不超过的尺寸
Bitmap bm = new Bitmap(size.Width, size.Height, PixelFormat.Format24bppRgb);
v.Generate(bandNos, ref bm);
return(bm);
}
private void UpdateBuffer()
{
ICanvasViewer viewer = _session.SmartWindowManager.ActiveCanvasViewer;
if (viewer == null || viewer.ActiveObject == null)
{
return;
}
IRasterDrawing drawing = viewer.ActiveObject as IRasterDrawing;
if (drawing == null || drawing.DataProvider == null)
{
return;
}
using (IRasterDataProvider prd = GeoDataDriver.Open(drawing.FileName) as IRasterDataProvider)
{
IOverviewGenerator ov = prd as IOverviewGenerator;
if (ov == null)
{
return;
}
Size size = ov.ComputeSize(200);
if (_buffer != null)
{
_buffer.Dispose();
}
_defaultBands = GetDefaultBands(prd);
if (_defaultBands == null || _defaultBands.Length == 0)
{
return;
}
if (_defaultBands.Length == 3)
{
_buffer = new Bitmap(size.Width, size.Height, PixelFormat.Format24bppRgb);
}
else if (_defaultBands.Length == 1)
{
_buffer = new Bitmap(size.Width, size.Height, PixelFormat.Format8bppIndexed);
_buffer.Palette = BitmapBuilderFactory.GetDefaultGrayColorPalette();
}
else
{
return;
}
//
ov.Generate(_defaultBands, ref _buffer);
//
_resX = drawing.OriginalEnvelope.Width / _buffer.Width;
_resY = drawing.OriginalEnvelope.Height / _buffer.Height;
}
}
private Bitmap GenerateOverview(IRasterDataProvider prd, int[] bandNos)
{
CoordEnvelope env = prd.CoordEnvelope;
if (env != null)
{
Envelope = new PrjEnvelope(env.MinX, env.MaxX, env.MinY, env.MaxY);
}
IOverviewGenerator v = prd as IOverviewGenerator;
Size size = v.ComputeSize(1000);//缩略图最大不超过的尺寸
Bitmap bm = new Bitmap(size.Width, size.Height, PixelFormat.Format24bppRgb);
v.Generate(bandNos, ref bm);
return(bm);
}
private void AVILayer_Click(object sender, EventArgs e)
{
string[] fnames = null;
using (OpenFileDialog dlg = new OpenFileDialog())
{
dlg.Filter = "栅格文件(*.dat)|*.dat";
dlg.Multiselect = true;
if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
fnames = dlg.FileNames;
}
else
{
return;
}
}
IRasterDataProvider prd;
List <Bitmap> bmps = new List <Bitmap>();
Bitmap bp;
foreach (string fname in fnames)
{
using (prd = GeoDataDriver.Open(fname) as IRasterDataProvider)
{
IOverviewGenerator ovg = prd as IOverviewGenerator;
Size size = ovg.ComputeSize(800);
bp = new Bitmap(size.Width, size.Height, PixelFormat.Format8bppIndexed);
bp.Palette = BitmapBuilderFactory.GetDefaultGrayColorPalette();
ovg.Generate(new int[] { 1 }, ref bp);
if (bp != null)
{
bmps.Add(bp);
}
}
}
if (bmps.Count == 0)
{
return;
}
//IAVILayer aviLyr = new AVILayer(bmps.ToArray(), new GeoDo.RSS.Core.DrawEngine.CoordEnvelope(112, 113, 39, 40), 500);
//aviLyr.IsRunning = true;
//_canvas.LayerContainer.Layers.Add(aviLyr);
////_canvas.PrimaryDrawObject = drawings[0];
////_canvas.CurrentEnvelope = drawings[0].OriginalEnvelope;
////for (int i = 0; i < drawings.Length; i++)
//// drawings[i].StartLoading((t, p) => { Text = p.ToString() + "/" + t.ToString(); });
//_canvas.Refresh(enumRefreshType.All);
}
private unsafe void DrawContourLine(IRasterDataProvider prd, ContourLine[] cLines)
{
if (cLines == null || cLines.Length == 0)
{
return;
}
IOverviewGenerator gen = prd as IOverviewGenerator;
Size size = gen.ComputeSize(1000);
size = new System.Drawing.Size(prd.Width, prd.Height);
Bitmap bitmap = new Bitmap(size.Width, size.Height, PixelFormat.Format24bppRgb);
float scaleX = size.Width / (float)prd.Width;
float scaleY = size.Height / (float)prd.Height;
gen.Generate(new int[] { 1, 1, 1 }, ref bitmap);
//
using (Graphics g = Graphics.FromImage(bitmap))
{
//g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
foreach (ContourLine cLine in cLines)
{
if (cLine == null || cLine.Count < 2)
{
continue;
}
//fixed (PointF* ptr0 = cLine.Points.ToArray())
//{
// PointF* ptr = ptr0;
// for (int i = 0; i < cLine.Points.Count; i++, ptr++)
// {
// ptr->X = ptr->X * scaleX;
// ptr->Y = ptr->Y * scaleY;
// }
//}
if ((byte)cLine.ContourValue == 100)
{
g.DrawCurve(Pens.Yellow, cLine.Points.ToArray());
}
else
{
g.DrawCurve(Pens.Red, cLine.Points.ToArray());
}
}
}
//
bitmap.Save("f:\\1.bmp", ImageFormat.Bmp);
}
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);
}