public void Update(CoordEnvelope coordEnvelope)
{
_isNeedUpdateHeader = false;
if (coordEnvelope != null)
{
_coordEnvelope = coordEnvelope.Clone();
_header.MinX = (float)_coordEnvelope.MinX;
_header.MaxX = (float)_coordEnvelope.MaxX;
_header.MinY = (float)_coordEnvelope.MinY;
_header.MaxY = (float)_coordEnvelope.MaxY;
if (_access == MemoryMappedFileAccess.ReadWrite)
{
//MemoryRasterHeader header = GetExtHeader<MemoryRasterHeader>();
SetExtHeader <MemoryRasterHeader>(_header);
string hdr = HdrFile.GetHdrFileName(_fileName);
if (File.Exists(hdr))
{
File.Delete(hdr);
}
}
else
{
_isNeedUpdateHeader = true;
}
}
}
public void Render(object sender, IDrawArgs drawArgs)
{
if (_bitmap == null || _coordEnvelope == null)
{
return;
}
CoordEnvelope evp = _coordEnvelope.Clone();
if (_isGeoCoord)
{
(sender as ICanvas).CoordTransform.Geo2Prj(evp);
}
double x1 = evp.MinX;
double y1 = evp.MinY;
double x2 = evp.MaxX;
double y2 = evp.MaxY;
drawArgs.QuickTransformArgs.Transform(ref x1, ref y1);
drawArgs.QuickTransformArgs.Transform(ref x2, ref y2);
Graphics g = drawArgs.Graphics as Graphics;
//g.DrawImage(_bitmap,
// RectangleF.FromLTRB((float)Math.Min(x1, x2), (float)Math.Min(y1, y2), (float)Math.Max(x1, x2), (float)Math.Max(y1, y2)));
g.DrawImage(_bitmap, new PointF[] { new PointF((float)x1, (float)y2), new PointF((float)x2, (float)y2), new PointF((float)x1, (float)y1) },
new RectangleF(0, 0, _bitmap.Width, _bitmap.Height), GraphicsUnit.Pixel, _ia);
}
