private void RenderFeatures(Graphics g, QuickTransformArgs quickTransfrom)
{
IFeatureClass fetclass = _class as IFeatureClass;
IGrid[] grids = fetclass.Grids;
if (grids == null || grids.Length == 0)
{
return;
}
try
{
fetclass.RepeatFeatureRecorder.BeginRender();
int gridCount = grids.Length;
Envelope currentExtent = _environment.ExtentOfProjectionCoord;
Grid gd = null;
IOutsideIndicator outsideIndicator = null;
//
for (int i = 0; i < gridCount; i++)
{
gd = grids[i] as Grid;
if (gd.IsEmpty())
{
continue;
}
outsideIndicator = (gd as ISupportOutsideIndicator).OutsideIndicator;
//test,draw grids
//DrawTestGrid(gd, g, quickTransfrom);
//
/* 为了测试其他投影矢量绘制注释掉
* outsideIndicator.SetOutside(!currentExtent.IsInteractived(gd.GridEnvelope,ref gd._isfullInternal));
* if (outsideIndicator.IsOutside)
* continue;
*/
outsideIndicator.SetOutside(!currentExtent.IsInteractived(gd.GridEnvelope, ref gd._isfullInternal));
if (outsideIndicator.IsOutside)
{
continue;
}
_featureRender.Render(_enabledDisplayLevel, quickTransfrom, gd, g, currentExtent, fetclass.RepeatFeatureRecorder);
}
}
finally
{
fetclass.RepeatFeatureRecorder.EndRender();
}
}
public void Render(System.Drawing.Graphics g, QuickTransformArgs quickTransform)
{
Envelope currentExtent = _environment.ExtentOfProjectionCoord;
if (!currentExtent.IsInteractived(_class.FullEnvelope))
{
return;
}
IMapRuntime runtime = _environment as IMapRuntime;
IRasterDataSource ds = _class.DataSource as IRasterDataSource;
enumCoordinateType coordType = ds.GetCoordinateType();
Envelope evp = null;
if (coordType == enumCoordinateType.Geographic)
{
evp = ToGeoEnvelope(runtime, currentExtent);
}
Bitmap bm = ds.Reader.Read(evp, runtime.Host.CanvasSize.Width, runtime.Host.CanvasSize.Height);
if (bm != null)
{
g.DrawImage(bm, 0, 0);
}
}
private void DrawAllGeometries(ILayerContainer layerContainer, Graphics g)
{
int currentScale = _scale;
try
{
ILayer[] layers = layerContainer.Layers;
IFeatureLayer fetlyr = null;
List <ILayerDrawable> twostepsLayers = new List <ILayerDrawable>();
IFeatureRenderer preRender = null;
foreach (ILayerDrawable lyr in layers)
{
if (!(lyr is IFeatureLayer))
{
continue;
}
fetlyr = lyr as IFeatureLayer;
if (preRender is IFeatureTwoStepRenderer && !(fetlyr.Renderer is IFeatureTwoStepRenderer))
{
FinishTwoStep(g, twostepsLayers);
}
preRender = fetlyr.Renderer;
(lyr as FeatureLayer)._isRendered = false;
if (!lyr.Visible)
{
continue;
}
//如果图层未初始化
if (!fetlyr.IsReady)
{
continue;
}
//判断整个图层是否在可视区域之外
IFeatureClass fetclass = fetlyr.Class as IFeatureClass;
if (!_viewportProjection.IsInteractived(fetclass.FullEnvelope))
{
continue;
}
//判断在当前比例尺下标注是否显示
if (!fetlyr.VisibleAtScale(currentScale))
{
continue;
}
//绘制几何形状
if (fetlyr.Renderer is IFeatureTwoStepRenderer)
{
twostepsLayers.Add(lyr);
//第一阶段
(fetlyr.Renderer as IFeatureTwoStepRenderer).StepType = enumTwoStepType.Outline;
}
//渲染几何形状
lyr.Render(g, _quickTransfrom);
(lyr as FeatureLayer)._isRendered = true;
//
g.Flush(FlushIntention.Sync);
}
if (twostepsLayers.Count > 0)//last layer
{
FinishTwoStep(g, twostepsLayers);
}
}
catch (Exception ex)
{
Log.WriterException(ex);
}
}