What would be the best way to download an osg texture into a region of
memory mapped host memory (i.e. at a fixed memory location)? I can bind
an osg::Image to a texture for the download, but as far as I know I can
not force an Image object to use a specific region of memory; it does
its own allocation on creation.
Do I have to do this manually using glGetTexImage()? I could get the
TextureObject associated with the texture, bind it, and then perform the
manual call. Only I'm not sure how I should set the contextID in the
osg::Texture::getTextureObject call. Or is there an easier way? I really
don't want to download it to an Image and then memcpy it to the mapped
region, since that's simply too slow.
--
Regards,
Ferdi Smit
INS3 Visualization and 3D Interfaces
CWI Amsterdam, The Netherlands
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