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OSMesa is used since Octave 4.0 for offscreen rendering from OpenGL toolkits FLTK and Qt. | |||
OSMesa | This enables printing without a X display, for example when ssh'ing to a remote machine, or if the figure is invisible ({{bug|33180}}). | ||
= libOSMesa = | |||
The minimum required version of OSMesa for Octave is 9.0.0. Versions < 9.0 show a strange bug where the return values of | |||
glGetIntegerv (GL_DEPTH_BITS, &z); | glGetIntegerv (GL_DEPTH_BITS, &z); | ||
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On Debian GNU/Linux 8.0 (jessie), Ubuntu 14.04 (trusty) and Fedora 21 there is no need to build OSMesa from source, just use your package manager which installs libosmesa > 10.0. | On Debian GNU/Linux 8.0 (jessie), Ubuntu 14.04 (trusty) and Fedora 21 there is no need to build OSMesa from source, just use your package manager which installs libosmesa > 10.0. | ||
== Build | == Build libOSMesa from source == | ||
Needed for example for Debian wheezy or Ubuntu 12.04.5 which ships OSMesa 8.0.5. | Needed for example for Debian wheezy or Ubuntu 12.04.5 which ships OSMesa 8.0.5. | ||
wget -nc ftp://ftp.freedesktop.org/pub/mesa/current/ | wget -nc ftp://ftp.freedesktop.org/pub/mesa/current/mesa-10.5.4.tar.xz | ||
tar | tar Jxf mesa-10.5.4.tar.xz | ||
cd | cd mesa-10.5.4/ | ||
autoreconf -fi | autoreconf -fi | ||
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--with-dri-drivers="" \ | --with-dri-drivers="" \ | ||
--with-gallium-drivers="" \ | --with-gallium-drivers="" \ | ||
--disable-shared-glapi \ | --disable-shared-glapi \ | ||
--disable-egl \ | --disable-egl \ | ||
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make check | make check | ||
sudo make install | sudo make install | ||
=== Floating point textures === | |||
Floating point textures are disabled by default due to patent restrictions. We should check if we can enable it with "--enable-texture-float" | |||
== known problems == | |||
Unfortunately, there are several known problems with using on-screen Mesa and OSMesa at the same time. | |||
The --without-OSMesa configure can be used to disable OSMesa if a problem is encountered. | |||
* {{bug|44478}} segmentation fault when using proprietary Nvidia drivers | |||
* {{bug|44979}} clumsy/missing configure check, relies on runtime failure | |||
* {{bug|44338}} doesn't work at all on Windows | |||
* [https://bugs.launchpad.net/bugs/1424059 LP #1424059] libosmesa6 is not installable on Ubuntu 14.04 with HWE updates | |||
* {{bug|50479}} doesn't work at all with libglvnd, now standard in most distributions | |||
=== workarounds === | |||
* Preload the Mesa libGL.so, for example | |||
export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libGL.so | |||
== Reporting Bugs == | |||
* Please include the output of | |||
glxinfo | grep "^OpenGL \(renderer\|core profile version\|vendor\)" |
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