[gdal-dev] Data Type Conversion

[Even Rouault]

Andrew,

Data type conversion is done by GDALCopyWords[64]: 
https://gdal.org/api/raster_c_api.html#_CPPv415GDALCopyWords64PKv12GDALDataTypeiPv12GDALDataTypei10GPtrDiff_t

The doc was a bit outdated, regarding conversion from floating point 
data types to integer data types. I've just adjusted it in 
https://github.com/OSGeo/gdal/commit/139e891b9b4a7b928c66e3daef83361fa530e6ac

Website should be refreshed soon

Even

Le 20/05/2024 à 17:01, Andrew Bell via gdal-dev a écrit :
> Hi,
>
> The documentation for GDALRasterBand::RasterIO says that it will 
> convert data from the source data type to the destination data type. I 
> searched the source code a bit I'm not sure I located the bit that 
> does this conversion. I'm trying to understand what happens in this 
> conversion process. Is this a numeric conversion as would be done with 
> a C/C++ cast or is this conversion simply add or truncate bytes in 
> order to fit in a destination data type. Or perhaps something else?

>
> Thanks,
>
> -- 
> Andrew Bell
> andrew.bell.ia at gmail.com
>
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> gdal-dev at lists.osgeo.org
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-- 
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