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
2016-10-21 13:47 GMT+01:00 Glenn Waldron <[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]> 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]>: >> >>> Bruno, I think you have those reversed. >>> >>> On Oct 21, 2016 6:07 AM, "Bruno Oliveira" <[email protected] >>> om> 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]>: >>>> >>>>> >>>>> 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] >>>>>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-opens >>>>>> cenegraph.org >>>>>> >>>>>> _______________________________________________ >>>>> osg-users mailing list >>>>> [email protected] >>>>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-opens >>>>> cenegraph.org >>>>> >>>> >>>> >>>> _______________________________________________ >>>> osg-users mailing list >>>> [email protected] >>>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-opens >>>> cenegraph.org >>>> >>>> >>> _______________________________________________ >>> osg-users mailing list >>> [email protected] >>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-opens >>> cenegraph.org >>> >>> >> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> 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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