[Gdal-dev] ColorTable in C#

[Jean Michel PIERRET]

Hi, 

I'm using the CVS : "gdal-cvs-2006.11.21.tar.gz", I see well the new Class
ColorEntry, but I still can't create a new ColorTable with 256 ColorEntry.


public static void test(string file, string file_out)
{
	Driver dv = null;
	Dataset ds = null, ds_out = null;
	Band ba = null, ba_out = null;
	ColorTable ct = null, ct_out = null;
	byte [] buffer;

	ds = gdal.Open(file, gdalconst.GA_ReadOnly);
	ba = ds.GetRasterBand(1);
	ct = ba.GetRasterColorTable();

	buffer = new byte [ds.RasterXSize * ds.RasterYSize];
	ba.ReadRaster(0, 0, ds.RasterXSize, ds.RasterYSize, buffer,
ds.RasterXSize, ds.RasterYSize, 0, 0);

	dv = gdal.GetDriverByName("GTiff");

	ds_out = dv.Create(file_out, ds.RasterXSize, ds.RasterYSize,
ds.RasterCount, ba.DataType, new string [] {});
	ba_out = ds_out.GetRasterBand(1);
    ct_out = new ColorTable(ct.GetCount());

	ba_out.WriteRaster(0, 0, ds.RasterXSize, ds.RasterYSize, buffer,
ds.RasterXSize, ds.RasterYSize, 0, 0);

	for (int i = 0; i < ct.GetCount(); i++)
	{
		ColorEntry ce = null, ce_out = null;

		ce = ct.GetColorEntry(i);
		ce_out = new ColorEntry();

		ce_out.c1 = ce.c1;
		ce_out.c2 = ce.c2;
		ce_out.c3 = ce.c3;
		ce_out.c4 = ce.c4;

		ct_out.SetColorEntry(i, ce_out);

		ce.Dispose();
		ce_out.Dispose();
	}

	ba_out.SetRasterColorTable(ct_out);

	ct_out.Dispose();
	ba_out.Dispose();
	ds_out.Dispose();

	ct.Dispose();
	ba.Dispose();
	ds.Dispose();
}

-----Message d'origine-----
De : Tamas Szekeres [mailto:szekerest at gmail.com] 
Envoyé : lundi 20 novembre 2006 14:06
À : Jean Michel PIERRET
Cc : gdal-dev at lists.maptools.org
Objet : Re: [Gdal-dev] ColorTable in C#

Hi,

I've just added the ColorEntry struct for the SWIG C# interface. Now you can
use

the ColorTable and ColorEntry classes along with
Band.SetRasterColorTable and Band.GetRasterColorTable.

Checkout the latest CVS and notify me how it works.


Best Regards,

Tamas Szekeres



2006/11/20, Jean Michel PIERRET <jmp at geosys.com>:
>
>
>
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> Hi,
>
>
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> How can I create a new ColorTable in C# for a new image.
>
>
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> Thank.
>
>
>
> PIERRET Jean michel.
>
>
>
>
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