making sure opengl is available

This troubleshooting is listed in this post:
https://init.linpro.no/pipermail/skolelinux.no/cinelerra/2010-January/016493.html

But I thought I'd repost here so that I always have this information at hand:

I have a GeForce 8800GT card installed in my box. I see glxinfo says I have OpenGL:
[sfr...@ogre my_cinelerra]$ glxinfo | head -20
name of display: :0.0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: NVIDIA Corporation
server glx version string: 1.4

I see glxgears points to the libGL.so.1 in /usr/lib64/nvidia:
[sfr...@ogre my_cinelerra]$ ldd `which glxgears`
linux-vdso.so.1 => (0x00007fff85dff000)
libGL.so.1 => /usr/lib64/nvidia/libGL.so.1 (0x00007f791fa75000)
libm.so.6 => /lib64/libm.so.6 (0x0000003f1bc00000)
libX11.so.6 => /usr/lib64/libX11.so.6 (0x0000003f1e800000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003f1c400000)
libc.so.6 => /lib64/libc.so.6 (0x0000003f1b800000)

libGLcore.so.1 => /usr/lib64/nvidia/libGLcore.so.1 (0x00007f791e5a3000) libnvidia-tls.so.1 => /usr/lib64/nvidia/tls/libnvidia-tls.so.1 (0x00007f791e4a1000)

libXext.so.6 => /usr/lib64/libXext.so.6 (0x0000003f1ec00000)
libdl.so.2 => /lib64/libdl.so.2 (0x0000003f1c000000)
libxcb.so.1 => /usr/lib64/libxcb.so.1 (0x0000003f1e400000)
/lib64/ld-linux-x86-64.so.2 (0x0000003f1b400000)
libXau.so.6 => /usr/lib64/libXau.so.6 (0x0000003f1e000000


I see that the libGL.so.1 in that directory has the appropriate OpenGL hooks:
[sfr...@ogre usr]$ strings -a /usr/lib64/nvidia/libGL.so.1 | grep glDeleteShader
glDeleteShader
[sfr...@ogre usr]$ strings -a /usr/lib64/nvidia/libGL.so.1 | grep glUseProgram
glUseProgram
glUseProgramObjectARB

I've tried manually pointing configure.in to the /usr/lib64/nvidia directory:
AC_CHECK_LIB([GL], [glUseProgram],
[OPENGL_LIBS="-lGL"; libGL=yes],
# On SUSE/OpenSUSE, NVidia places the OpenGL 2.0 capable library in
/usr/X11R6/lib
# but it doesn't place a libGL.so there, so the linker won't pick it up
# we have to use the explicit libGL.so.1 path.
save_LIBS="$LIBS"
for l in /usr/lib64/nvidia /usr/X11R6/lib /usr/X11R6/lib64; do
LIBS="$l/libGL.so.1"
AC_MSG_CHECKING(for glUseProgram in $l/libGL.so.1)
AC_TRY_LINK([],[extern int glUseProgram();
glUseProgram();],
[OPENGL_LIBS="$l/libGL.so.1";
libGL=yes],[libGL=no])
AC_MSG_RESULT([$libGL])
test $libGL = yes && break
done
LIBS="$save_LIBS"

In the end, even though ./configure did not recognize that I had openGL properly installed, I had to explicitly enable opengl on my ./configure line:
./configure --enable-opengl

Who knew?
da mule

basic OpenGL vs XV performance stats

Thought I'd share some Cinelerra performance stats using OpenGL versus non-OpenGL (XV) display drivers. I used two tracks of identical length (32s), but different content.

OpenGL
one 32s 720P track: 20fps
two 32s 720P tracks, both play enabled, no fade on top track: 2.97fps
two 32s 720P tracks, both play enabled, 50% fade on top track: 3.04fps

Stopped then restarted Cinelerra and performed next test.

XV
one 32s 720P track: 10.6fps
two 32s 720P tracks, both play enabled, no fade on top track: 2.2fps
two 32s 720P tracks, both play enabled, 50% fade on top track: 2.18fps

Not fabulous performance for using > 1 track, but still slight improvement over XV.

ATI OpenGL 2.0 implementation incomplete..hello NVidia!

Sad to say, but all you ATI lovers (like I USED to be) are in for a rude surprise with ATIs' "OpenGL2.0" Linux driver implementation. After 1 1/2 days of finally getting my ATI All in Wonder 9800 Pro to actually use Direct Rendering and OpenGL2.0 and see it working well (5000FPS on glxgears), it was very disheartening to find out that ATI had not provided the proper 2.0 hooks for Cinelerra to use. Specifically, programming hooks like glDeleteShader were not implemented. The troubleshooting was quite informative, as I am not an active C programmer.

The solution was typical of today's PC market. If it don't work, buy one that does! So I went to B&H Photo and bought a BFG nVidia GeForce 7600GS, 512MB. Twenty minutes after getting home, the card was in the box, drivers were compiled, installed and working. Fifteen minutes after that, Cinelerra was compiled and I was using OpenGL2.0! Yeehoo!! And at twice the playback speed of what I was getting previously with the ATI card. I will report back on the performance of this card once I actually USE it.

openGL acceleration for Cinelerra not working just yet

Well, I spent all Sunday and Monday reconfiguring my workstation for hardware rendering (as detailed here), but my recompile of the latest Cinelerra code blew up on some obscure header file. Hopefully, the smart fellows on http://cvs.cinelerra.org can help out.