[osg-users] Vanishing letters in osg::Text

[Maxim Gammer]

Here is the solution:

text->setFontResolution(18,18);



2017-04-25 17:13 GMT+05:00 Volckaert, Guy (CA - MTS) <
Guy.Volckaert at meggitt.com>:

> Hi,
>
> I'm using OSG v3.4.0 and I resolved this issue by adding a
> glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,...) before calling
> glTexSubImage2D() in glyph.cpp. This problem was occurring if I was using
> an Intel video driver.
>
> void Glyph::subload() const
> {
> [...]
>
> // MTSI_BEGIN
>     // This line was added to resolve a problem with intel chipsets. In
> essence, some of the
>     // numeric glyphs would not display correctly. They would appear grey
> or transparent.
>     if( getTexture() )
>     {
>         glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
> getTexture()->getFilter( osg::Texture::MIN_FILTER ) );
>     }
> // MTSI_END
>
>     glTexSubImage2D(GL_TEXTURE_2D,0,
>                     _texturePosX,_texturePosY,
>                     s(),t(),
>                     (GLenum)getPixelFormat(),
>                     (GLenum)getDataType(),
>                     data());
> [...]
> }
>
> void GlyphTexture::apply(osg::State& state) const
> {
> [...]
> // MTSI_BEGIN
>             // This line was added to resolve a problem with intel
> chipsets. In essence, some of the
>             // numeric glyphs would not display correctly. They would
> appear grey or transparent.
>             glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
> _min_filter);
> // MTSI_END
>             // Subload the image once
>             glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
>                     getTextureWidth(),
>                     getTextureHeight(),
>                     OSGTEXT_GLYPH_FORMAT, GL_UNSIGNED_BYTE, local_data);
> [...]
> }
>
> Regards,
>
> -----Original Message-----
> From: osg-users [mailto:osg-users-bounces at lists.openscenegraph.org] On
> Behalf Of Tim Hartter
> Sent: April-25-17 7:29 AM
> To: OpenSceneGraph Users
> Subject: Re: [osg-users] Vanishing letters in osg::Text
>
> Setting OSG_TEXT_INCREMENTAL_SUBLOADING to off does not make a difference
> and YES it happens on Intel cards (not on Nvidia) (Win 7 OSG 3.4)
>
> Maybe the patched OSG text works better...
>
> Mit AquaMail Android
> http://www.aqua-mail.com gesendet
>
>
> Am 25. April 2017 10:18:21 vorm. schrieb Robert Osfield
> <robert.osfield at gmail.com>:
>
> > On 25 April 2017 at 06:34, Wouter Roos <rooswouter at gmail.com> wrote:
> >> I've experienced a similar issue lately where we were running a
> >> project on lower spec systems with only an integrated GPU. On those
> >> systems the frame rate would not show properly, having the same issue
> >> as described here, with some numbers not showing properly.
> >> I did a test on my laptop, and when I force it to use the integrated
> >> GPU
> >> (4600) the problems shows up as well. If I switch to use the GTX970M
> >> everything is fine again. This is all on Windows 10, osg 3.4.0 I
> >> haven't done any further investigation as the project is not using
> >> any Text objects, but maybe this might help somehow.
> >
> > Some hardware/drivers don't support texture sub-loading correctly so
> > the osgText subloading of new glyphs could cause problems, perhaps
> > this is what you are seeing.  It's problem that originally occurred on
> > Radeon's and some SGI hardware so there is a workaround in osgText
> > that detects these combinations in drivers, you can also enable the
> > workaround by setting the env var OSG_TEXT_INCREMENTAL_SUBLOADING to
> > OFF i.e. under bash you'd do:
> >
> >   export OSG_TEXT_INCREMENTAL_SUBLOADING=OFF
> >   osgtext
> >
> > Under windows I think it's something like:
> >
> >   set OSG_TEXT_INCREMENTAL_SUBLOADING=OFF
> >   osgtext
> >
> > The OSG master version has a had a major rewrite of osgText so it no
> > longer uses the texture subloading as may well just work out of the
> > box on the Intel GPU/drivers that you have.
> >
> > Robert.
> > _______________________________________________
> > 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
>
> ________________________________
>
>
> This e-mail may contain proprietary information and/or copyright material.
> This e-mail is intended for the use of the addressee only. Any unauthorized
> use may be unlawful. If you receive this e-mail by mistake, please advise
> the sender immediately by using the reply facility in your e-mail software.
>
> Information contained in and/or attached to this document may be subject
> to export control regulations of the European Community, USA, or other
> countries. Each recipient of this document is responsible to ensure that
> usage and/or transfer of any information contained in this document
> complies with all relevant export control regulations. If you are in any
> doubt about the export control restrictions that apply to this information,
> please contact the sender immediately.
>
> Be aware that Meggitt may monitor incoming and outgoing e-mails to ensure
> compliance with the Meggitt IT Use policy.
>
> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>



-- 
--------------------------------
Maxim Gammer
+79199510073
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/attachments/20170515/1d6554cb/attachment-0002.htm>