Hi Jimmy, Performance of various OpenGL calls is very dependent upon the driver and hardware you have, and in particular what formats they accelerate on the GPU varies, if you don't use the fast paths for that driver/hardware combination then you can see big performance drops as the operations are done on the CPU instead.
What's specifically happening in your case I can't say, I know nothing about your specific usage, OS, hardware, drivers. Hopefully the above will give you some hints of where to look. Robert. On 5 November 2013 03:04, Boon Wah <[email protected]> wrote: > Hi, > > I notice that glCompressedTexImage2D takes the longest time during > texture loading. Can I understand what does this function actually does? > > I thought the texture decompression is handled by GPU, and loading to > GPU actually should be significantly fast. In my testing, uncompress > texture loads faster than compressed texture and this does not make sense > to me. > > I will like to reduce the time in glCompressedTexImage2D as it ia > significant in my application. Can somebody please advise me? Thanks. > > > Kind Regards, > Jimmy > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=57068#57068 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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