Le lundi 11 mars 2013 21:21:50, Allen Kempe a écrit :
> In Rfc 24: GDAL Progressive Data Support it says that the metadata for a
> driver will specify metadata item "DCAP_ASYNCIO" as yes if the driver
> supports asynchronous IO. So, code like this should retrieve this option:
> const char* s_asyncio = drv->GetMetadataItem("DCAP_ASYNCIO");
> However, I have been unable to find any drivers that return "Yes".Hum, grepping the GDAL code base, it seems that this metadata item has never been set in drivers implementing progressive rendering. > > So, is this the correct way to check whether a driver supports > asynchronous io? > Are there any drivers that currently support this besides Kadaku which I > don't have? "grep -r BeginAsyncReader frmts/" shows that the only drivers supporting async io are JPIPKAK and ECW (with SDK 4.x and later) > > > Allen Kempe > > http://acksoft.dyndns.biz/PictureGallery > 298 W. Audubon Drive > Shepherdsville, KY 40165 > +1 502 543-3438 _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
