SetColorInterpretation(GCI_PaletteIndex) doesn't work with GTiffDriver->Create()

[cleo]

GDALDataset *m_pDataSet = poDriver->Create(

in_fileName.c_str(), 32, 32, 1, GDT_Byte, NULL);

Then if you do:

m_pDataSet->GetBand(1)->SetColorInterpretation(GCI_PaletteIndex);

it won't give an error, but when you do GetColorInterpretation(), it returns GCI_GrayIndex. Works fine for RGB 24 and 32 bit colour though. Doesn't matter if I set the ColorInterpretation before setting the color table, after or both. It stays at GCI_GrayIndex no matter what. If I reload the newly created file, everything is fine with GCI_PaletteIndex.

[Even Rouault]

r24075 /trunk/gdal/frmts/gtiff/geotiff.cpp: GTiff: set color interpretation to GCI_PaletteIndex after calling SetColorTable() (#4547)

This is a partial fix, but there's not much more that we can do. SetColorInterpretation() on the GTiff driver only really work on alpha bands. The color interpretation is dedecuded from the TIFF Photometric TAG, the presence of color table and the value of the ExtraSamples tag.

[cleo]

Perfect! Thanks for looking into it. Main concern is expected behaviour. If SetColorTable() sets the proper color interpretation, that means no special case on our end. Also, thanks for the explanation on SetColorInterpretation().