public void WritePixels()
{
Erdas74Pixel8 pixel = new Erdas74Pixel8();
WritableImage image = new WritableImage(outputGisImagePath,
new Dimensions(10,10),
1,
System.TypeCode.Byte,
null);
byte[] bytes = new byte[1];
bytes[0] = 1;
pixel[0].SetBytes(bytes,0);
int pixCount = image.Dimensions.Rows * image.Dimensions.Columns;
for (int i = 0; i < pixCount; i++)
{
image.WritePixel(pixel);
}
image.Close();
}
private bool disposed = false; // track whether resources have been released
/// <summary>
/// Constructor - takes an already constructed ERDAS image file
/// </summary>
public OutputRaster(WritableImage image)
{
this.image = image;
// make sure we got valid image
if (this.image == null)
{
throw new System.ApplicationException("OutputRaster constructor passed null image");
}
// Begin test bandtype compatibilities
T desiredLayout = new T();
int bandCount = desiredLayout.BandCount;
System.TypeCode bandType = desiredLayout[0].TypeCode;
// check band 0
if (bandType != image.BandType)
{
throw new System.ApplicationException("OutputRaster band type mismatch");
}
// check bands 1 to n-1
for (int i = 1; i < bandCount; i++)
{
IPixelBand band = desiredLayout[i];
if (band.TypeCode != bandType)
{
throw new System.ApplicationException("OutputRasters with mixed band types not supported");
}
}
}
/// <summary>
///
/// </summary>
public IOutputRaster <T> Create <T>(string path,
Dimensions dimensions,
IMetadata metadata)
where T : IPixel, new()
{
// extract necessary parameters from pixel for image creation
T desiredLayout = new T();
int bandCount = desiredLayout.BandCount;
System.TypeCode bandType = desiredLayout[0].TypeCode;
// open image file for writing
WritableImage image
= new
WritableImage(path, dimensions, bandCount, bandType, metadata);
// construct an OutputRaster from that
return(new OutputRaster <T>(image));
}
public void WriteTooManyPixels()
{
WritableImage image = null;
try {
Erdas74Pixel8 pixel = new Erdas74Pixel8();
image = new WritableImage(outputGisImagePath,
new Dimensions(10,10),
1,
System.TypeCode.Byte,
null);
byte[] bytes = new byte[1];
bytes[0] = 1;
pixel[0].SetBytes(bytes,0);
int pixCount = image.Dimensions.Rows * image.Dimensions.Columns;
for (int i = 0; i < pixCount; i++)
{
image.WritePixel(pixel);
}
// one too many
image.WritePixel(pixel);
}
catch (System.Exception exc) {
Data.Output.WriteLine(exc.Message);
throw;
}
finally {
if (image != null)
image.Close();
}
}
