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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); | ||
| Line 11: | Line 16: | ||
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 \ | ||
| Line 40: | Line 44: | ||
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 \(renderer\|core profile version\|vendor\)" | |||
Latest revision as of 08:55, 18 November 2017
OSMesa is used since Octave 4.0 for offscreen rendering from OpenGL toolkits FLTK and Qt.
This enables printing without a X display, for example when ssh'ing to a remote machine, or if the figure is invisible (#33180).
libOSMesa[edit]
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_STENCIL_BITS, &s); glGetIntegerv (GL_ACCUM_RED_BITS, &a);
contain arbitrary values and the rendered buffer is garbage. This only happens if OSMesa is linked together with Octave, standalone OSMesa examples works fine.
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 libOSMesa from source[edit]
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/mesa-10.5.4.tar.xz tar Jxf mesa-10.5.4.tar.xz cd mesa-10.5.4/ autoreconf -fi ./configure \ CXXFLAGS="-O2 -g -DDEFAULT_SOFTWARE_DEPTH_BITS=31" \ CFLAGS="-O2 -g -DDEFAULT_SOFTWARE_DEPTH_BITS=31" \ --disable-xvmc \ --disable-glx \ --disable-dri \ --with-dri-drivers="" \ --with-gallium-drivers="" \ --disable-shared-glapi \ --disable-egl \ --with-egl-platforms="" \ --enable-osmesa \ --enable-gallium-llvm=no \ --prefix=/usr/local/mesa/10.2.2/classic make -j4 # optional make check sudo make install
Floating point textures[edit]
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[edit]
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.
- #44478 segmentation fault when using proprietary Nvidia drivers
- #44979 clumsy/missing configure check, relies on runtime failure
- #44338 doesn't work at all on Windows
- LP #1424059 libosmesa6 is not installable on Ubuntu 14.04 with HWE updates
- #50479 doesn't work at all with libglvnd, now standard in most distributions
workarounds[edit]
- Preload the Mesa libGL.so, for example
export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libGL.so
Reporting Bugs[edit]
- Please include the output of
glxinfo | grep "^OpenGL \(renderer\|core profile version\|vendor\)"