Hello,
I'm encountering performance problems when loading lots of textures in
my scene.
I've been trying to set options like internalFormatMode to
USE_S3TC_DXT5_COMPRESSION, but I can't see any effect, and wonder what
syntax I should be using:
If I call
osgDB::ReaderWriter::Options* pOptions = new
osgDB::ReaderWriter::Options();
pOptions->setObjectCacheHint(
osgDB::ReaderWriter::Options::CACHE_ALL );
pOptions->setOptionString(
"internalFormatMode=USE_S3TC_DXT5_COMPRESSION;unRefImageDataAfterApply=TRUE;useHardwareMipMapGeneration=FALSE"
);
I can't see much of a result, and I've been crawling in the source code
to try to find where this is parsed without success.
I've delved a little into the code and found that only ive and osg
plugins seem to handle these options. Would it be possible to parse
these options at the osgdb level rather than the plugin level?
Also, I am not sure whether it is possible to cache Texture objects in
osgdb. Images are correctly cached, but operations like rescaling
textures seem to be called several times for the same image. Is there a
way for me to explicitly call a cache on the Texture objects to avoid
such rescaling?
Thanks in advance,
Laurent Di Cesare.
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