Version 1 (modified by 17 years ago) ( diff ) | ,
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RFC 14: NoData Bitmasks
Author: Frank Warmerdam
Contact: warmerdam@…
Status: Development
Summary
Some file formats support a concept of a bitmask to identify pixels that are not valid data. This can be particularly valuable with byte image formats where a nodata pixel value can not be used because all pixel values have a valid meaning. This RFC tries to formalize a way of recognising and accessing such nodata bitmasks through the GDAL API.
virtual CPLErr BitmaskIO( GDALRWFlag, int, int, int, int, GByte *, int, int, GDALDataType, int, int *, int, int, int );
Implementation Plan
This change will be implemented by Frank Warmerdam in trunk in time for the 1.5.0 release.
SWIG Implications
Testing
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