[osg-users] Creating Texture2DArray
Bruno Oliveira
bruno.manata.oliveira at gmail.com
Fri Oct 21 06:36:32 PDT 2016
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.messerschmidt at 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 <gwaldron at gmail.com
>> <mailto:gwaldron at 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.oliveira at gmail.com
>> <mailto:bruno.manata.oliveira at 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 <gwaldron at gmail.com
>> <mailto:gwaldron at gmail.com>>:
>>
>> Bruno, I think you have those reversed.
>>
>>
>> On Oct 21, 2016 6:07 AM, "Bruno Oliveira"
>> <bruno.manata.oliveira at gmail.com
>> <mailto:bruno.manata.oliveira at 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.messerschmidt at gmx.de
>> <mailto:sebastian.messerschmidt at 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 at lists.openscenegraph.org
>> <mailto:osg-users at 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 at lists.openscenegraph.org
>> <mailto:osg-users at 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 at lists.openscenegraph.org
>> <mailto:osg-users at 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 at lists.openscenegraph.org
>> <mailto:osg-users at 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 at lists.openscenegraph.org
>> <mailto:osg-users at 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 at lists.openscenegraph.org
>> <mailto:osg-users at 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 at lists.openscenegraph.org
>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>
>> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/attachments/20161021/4d244e1d/attachment-0003.htm>
More information about the osg-users
mailing list