/// <summary>
/// Call the build function of the inner Raster Type and generate a thumbnail from the Builder Item created.
/// </summary>
/// <param name="pItemURI">URI of the Item to be built</param>
/// <returns></returns>
public IBuilderItem Build(IItemURI pItemURI)
{
IBuilderItem pbuilderItem = innerRasterBuilder.Build(pItemURI); // Generate the IBuilderItem
Resampling(pbuilderItem); // Generate the Thumbnail from the item.
return(pbuilderItem);
}
/// <summary>
/// Each BuilderItem contains a Function Raster Dataset which is used to create the thumbnail.
/// The thumbnail is created by Nearest Neighbor resampling of the Function Raster Dataset.
/// The resampled raster is exported as a byte array and saved Into the IMemoryBlobStreamVariant.
/// The blob is then inserted into the Thumbnail field.
/// </summary>
/// <param name="mybuilderItem">Item containing the Function Dataset to be added to the Mosaic Dataset</param>
private void Resampling(IBuilderItem mybuilderItem)
{
try
{
IFunctionRasterDataset pFuncRasterDataset = mybuilderItem.Dataset; // Get the FunctionRasterDataset from mybuilderItem
IRasterDataset pRasterDataset;
pRasterDataset = (IRasterDataset)pFuncRasterDataset; // Cast the FunctionRasterDataset to Raster Dataset
IPropertySet thePropSet = pFuncRasterDataset.Properties; // Get the properties of the raster Dataset
IRaster praster = pRasterDataset.CreateDefaultRaster(); // Create default raster from the above raster dataset
praster.ResampleMethod = rstResamplingTypes.RSP_NearestNeighbor; // The raster is resampled by RSP_NearestNeighbor
IRasterProps pRasterProps = (IRasterProps)praster; // Raster properties are used to update the height, width of the raster
pRasterProps.Height = 256;
pRasterProps.Width = 256;
IRasterExporter pConverter = new RasterExporterClass(); // IRasterExporter object is used to convert the raster to byte array.
byte[] pBytesArr;
pBytesArr = pConverter.ExportToBytes(praster, "TIFF"); // Convert the resampled Raster to a Byte array
IMemoryBlobStream memBlobStream = new MemoryBlobStream(); // Create new IMemoryBlobStream
IMemoryBlobStreamVariant varBlobStream = (IMemoryBlobStreamVariant)memBlobStream; // Assign to IMemoryBlobStreamVariant
object anObject = pBytesArr;
varBlobStream.ImportFromVariant(anObject); // IMemoryBlobStreamVariant object is assigned the byte array
thePropSet.SetProperty("ThumbNail", memBlobStream); // and saved to the property "ThumbNail"
}
catch (Exception ex)
{
System.Exception myExc = new System.Exception(
"Error: Failed to Re-Sampled the raster.Thumbnails will not be created." + ex.Message, ex);
throw myExc;
}
return;
}
public IBuilder AddItem(IBuilderItem item)
{
if (this.House.Items == null)
{
this.House.Items = new List <IBuilderItem>();
}
this.House.Items.Add(item);
return(this);
}
/// <summary>
/// Each BuilderItem contains a Function Raster Dataset which is used to create the thumbnail.
/// The thumbnail is created by Nearest Neighbor resampling of the Function Raster Dataset.
/// The resampled raster is exported as a byte array and saved Into the IMemoryBlobStreamVariant.
/// The blob is then inserted into the Thumbnail field.
/// </summary>
/// <param name="mybuilderItem">Item containing the Function Dataset to be added to the Mosaic Dataset</param>
private void Resampling(IBuilderItem mybuilderItem)
{
try
{
IFunctionRasterDataset pFuncRasterDataset = mybuilderItem.Dataset; // Get the FunctionRasterDataset from mybuilderItem
IRasterDataset pRasterDataset;
pRasterDataset = (IRasterDataset)pFuncRasterDataset; // Cast the FunctionRasterDataset to Raster Dataset
IPropertySet thePropSet = pFuncRasterDataset.Properties; // Get the properties of the raster Dataset
IRaster praster = pRasterDataset.CreateDefaultRaster(); // Create default raster from the above raster dataset
praster.ResampleMethod = rstResamplingTypes.RSP_NearestNeighbor; // The raster is resampled by RSP_NearestNeighbor
IRasterProps pRasterProps = (IRasterProps)praster; // Raster properties are used to update the height, width of the raster
pRasterProps.Height = 256;
pRasterProps.Width = 256;
IRasterExporter pConverter = new RasterExporterClass(); // IRasterExporter object is used to convert the raster to byte array.
byte[] pBytesArr;
pBytesArr = pConverter.ExportToBytes(praster, "TIFF"); // Convert the resampled Raster to a Byte array
IMemoryBlobStream memBlobStream = new MemoryBlobStream(); // Create new IMemoryBlobStream
IMemoryBlobStreamVariant varBlobStream = (IMemoryBlobStreamVariant)memBlobStream; // Assign to IMemoryBlobStreamVariant
object anObject = pBytesArr;
varBlobStream.ImportFromVariant(anObject); // IMemoryBlobStreamVariant object is assigned the byte array
thePropSet.SetProperty("ThumbNail", memBlobStream); // and saved to the property "ThumbNail"
}
catch (Exception ex)
{
System.Exception myExc = new System.Exception(
"Error: Failed to Re-Sampled the raster.Thumbnails will not be created." + ex.Message, ex);
throw myExc;
}
return;
}