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 <[email protected] <mailto:[email protected]>>: 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 <[email protected] <mailto:[email protected]>> 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 <[email protected] <mailto:[email protected]>>: Bruno, I think you have those reversed. On Oct 21, 2016 6:07 AM, "Bruno Oliveira" <[email protected] <mailto:[email protected]>> 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 <[email protected] <mailto:[email protected]>>: 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::Texture2DArray::MIN_FILTER, osg::Texture2DArray::LINEAR); texture->setFilter(osg::Texture2DArray::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 [email protected] <mailto:[email protected]> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org <http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org> _______________________________________________ osg-users mailing list [email protected] <mailto:[email protected]> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org <http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org> _______________________________________________ osg-users mailing list [email protected] <mailto:[email protected]> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org <http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org> _______________________________________________ osg-users mailing list [email protected] <mailto:[email protected]> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org <http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org> _______________________________________________ osg-users mailing list [email protected] <mailto:[email protected]> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org <http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org> _______________________________________________ osg-users mailing list [email protected] <mailto:[email protected]> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org <http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org> _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
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