[gdal-dev] Proxy vs Real Driver in GDAL

[John Smith]

Yeah
I am after that kind of explanation.
@Even Rouault via gdal-dev<mailto:gdal-dev at lists.osgeo.org> - Do you think there is any quick explanation available for this scenario?
________________________________
From: Parveen Sharma <sharma1981 at outlook.com>
Sent: Monday, July 7, 2025 9:21 AM
To: Even Rouault via gdal-dev <gdal-dev at lists.osgeo.org>; John Smith <johnsmith7862025 at outlook.com>; Even Rouault <even.rouault at spatialys.com>
Subject: Re: [gdal-dev] Proxy vs Real Driver in GDAL

Thanks Even

Still do you think I could have a brief intro if it's an in-tree driver. So from that point of view what would constitute a proxy and real driver?

________________________________
From: gdal-dev <gdal-dev-bounces at lists.osgeo.org> on behalf of Even Rouault via gdal-dev <gdal-dev at lists.osgeo.org>
Sent: Monday, July 7, 2025 5:03 PM
To: John Smith <johnsmith7862025 at outlook.com>; Even Rouault via gdal-dev <gdal-dev at lists.osgeo.org>
Subject: Re: [gdal-dev] Proxy vs Real Driver in GDAL


John,


As stated in the intro, this RFC is mostly for *in-tree* drivers. If you develop an out-of-tree plugin that doesn't modify GDAL sources, then you can ignore it


Even


Le 07/07/2025 à 10:55, John Smith via gdal-dev a écrit :
Hello

Can anyone explain the concept of proxy driver and real driver in GDAL? I am looking at the link https://gdal.org/en/stable/development/rfc/rfc96_deferred_plugin_loading.html

Say I create an external plugin of some data format for e.g. say JP2 and then some Geospatial server loads my plugin file.


  1.
In this scenario I think the geospatial driver needs GDAL libs as well?
  2.
Now what is the proxy driver and what is real driver in this context? Is the real driver inside GDAL or inside my plugin?
  3.
What is the proxy driver in context of question (b)



Please clarify me so that I have clear picture in my mind.

BR
John




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