Thanks for the answer. Using GL_LUMINANCE8UI yields undefined symbol. The closest symbols I have defined is GL_LUMINANCE8UI_EXT.
However, using internal TExture Format as GL_LUMINANCE8UI_EXT and pixel format GL_LUMINANCE yields 'invalid operation' errors 2016-10-21 14:03 GMT+01:00 Sebastian Messerschmidt < sebastian.messerschm...@gmx.de>: > Hi Bruno, > > > > > How do I guarantee that my textures will be unsigned integer 8bit texels >> with no scaling nor normalization to float or whatsoever? Because using >> GL_LUMINANCE is distupring my textures >> > > GL_LUMINANCE8UI should do the trick. You need use a the correct > sampler/data-type in the shader too (usampler and uvec) > > Cheers > Sebatian > > >> 2016-10-21 13:47 GMT+01:00 Glenn Waldron <gwald...@gmail.com >> <mailto:gwald...@gmail.com>>: >> >> I mean that GL_LUMINANCE is a valid pixel format, and GL_LUMINANCE8 >> is an internal format. GL_LUMINANCE8 is not a valid pixel format and >> will probably give you a invalid enumerant error. >> >> >> >> Glenn Waldron >> >> On Fri, Oct 21, 2016 at 8:03 AM, Bruno Oliveira >> <bruno.manata.olive...@gmail.com >> <mailto:bruno.manata.olive...@gmail.com>> wrote: >> >> Sorry Glenn what do you mean by "those reserved"? >> >> >> By the way, my intention is to pass uchar textures of fixed >> size, to perform texelFetch and bitwise operations inside a >> shader, so I really need my textures to be in the exact format >> of unsigned byte integer, single channel! >> >> 2016-10-21 12:25 GMT+01:00 Glenn Waldron <gwald...@gmail.com >> <mailto:gwald...@gmail.com>>: >> >> Bruno, I think you have those reversed. >> >> >> On Oct 21, 2016 6:07 AM, "Bruno Oliveira" >> <bruno.manata.olive...@gmail.com >> <mailto:bruno.manata.olive...@gmail.com>> wrote: >> >> Hello, >> >> thank you for your answer. I am indeed using the same >> texture sizes and formats. >> If I use GL_LUMINANCE8 as pixelFormat and GL_LUMINANCE >> as internalFormat, I get a "invalid enumerant" error >> >> 2016-10-21 7:56 GMT+01:00 Sebastian Messerschmidt >> <sebastian.messerschm...@gmx.de >> <mailto:sebastian.messerschm...@gmx.de>>: >> >> >> >> Hi Bruno: >> Sorry for not reading to the end: >> >> Hello, >> >> I'm trying to create a Texture2DArray. My >> textures are uchar images with >> size (texWidth, 256), single channel. The >> combination of texture >> internalFormat and pixelFormat with pixelType is >> not working. I use >> GL_R8UI for internalFormat, GL_RED_INTEGER for >> pixelFormat and >> GL_UNSIGNED_BYTE for type. This yields the >> following error when I try to >> render my scene: >> >> /Warning: detected OpenGL error 'invalid >> enumerant' at after >> RenderBin::draw(..)/ >> >> However, if I use GL_LUMINANCE for >> internalFormat and also GL_LUMINANCE >> for pixelFormat, I get no errors but my textures >> are not correctly >> sized. WHat formats should I use here? >> >> When using GL_LUMINCANE as internal formet the >> pixlel format needs to be >> GL_LUMINANCE4/8/12/16[F/I/UI] ... >> >> So basically for default precision (GL_BYTE) it >> should be >> >> GL_LUMINANCE8 >> >> >> Cheers >> Sebastian >> >> >> This is my code: >> >> >> >> osg::ref_ptr<osg::Texture2DArray> texture = new >> osg::Texture2DArray; >> texture->setFilter(osg::Textur >> e2DArray::MIN_FILTER, >> osg::Texture2DArray::LINEAR); >> texture->setFilter(osg::Textur >> e2DArray::MAG_FILTER, >> osg::Texture2DArray::LINEAR); >> texture->setWrap(osg::Texture2DArray::WRAP_R, >> osg::Texture2DArray::REPEAT); >> texture->setInternalFormat(*textureFormat()*); >> >> >> // Add some images as follows: >> for (...) { >> >> osg::Image* image = new osg::Image; >> image->setImage(texWidth, 256, 1, >> *textureFormat(), pixelFormat(), >> type(),* dataPtr); >> >> texture->setImage(i, image); >> } >> >> >> I am using: >> textureFormat() = GL_R8UI; >> pixelFormat() = GL_RED_INTEGER; >> type() = GL_UNSIGNED_BYTE >> >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> <mailto:osg-users@lists.openscenegraph.org> >> http://lists.openscenegraph.or >> g/listinfo.cgi/osg-users-openscenegraph.org >> <http://lists.openscenegraph.o >> rg/listinfo.cgi/osg-users-openscenegraph.org> >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> <mailto:osg-users@lists.openscenegraph.org> >> http://lists.openscenegraph.or >> g/listinfo.cgi/osg-users-openscenegraph.org >> <http://lists.openscenegraph.o >> rg/listinfo.cgi/osg-users-openscenegraph.org> >> >> >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> <mailto:osg-users@lists.openscenegraph.org> >> http://lists.openscenegraph.or >> g/listinfo.cgi/osg-users-openscenegraph.org >> <http://lists.openscenegraph.o >> rg/listinfo.cgi/osg-users-openscenegraph.org> >> >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> <mailto:osg-users@lists.openscenegraph.org> >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-opens >> cenegraph.org >> <http://lists.openscenegraph.org/listinfo.cgi/osg-users-open >> scenegraph.org> >> >> >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> <mailto:osg-users@lists.openscenegraph.org> >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-opens >> cenegraph.org >> <http://lists.openscenegraph.org/listinfo.cgi/osg-users-open >> scenegraph.org> >> >> >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> <mailto:osg-users@lists.openscenegraph.org> >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-opens >> cenegraph.org >> <http://lists.openscenegraph.org/listinfo.cgi/osg-users-open >> scenegraph.org> >> >> >> >> >> _______________________________________________ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> >> _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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