I installed the newly released Mesa-6.2 and it seems to work with that now. Borlan Wayne Boucher wrote: >Hello, > >After a bit of grief (just finding an SGI with a compiler on it) I can see >what is causing the problem but the "solution" so far is not complete. > >In order to know what "drawable" (OpenGL jargon) is being drawn in, the >Python widget gets passed to the C world and a "context" (more OpenGL >jargon) is created, and to do that you need a "visual" (more OpenGL >jargon). Then when you want to draw into that drawable you make a call to >glXMakeCurrent() with that drawable and context as arguments. The >glXMakeCurrent() man page says: > >"BadMatch is generated if drawable was not created with the same X screen >and visual as ctx. It is also generated if drawable is None and ctx is not >None." > >I checked explicitly and drawable and ctx (the context) are both not None. >And there is only one screen. So it looks like the drawable was not >created with the same visual as ctx. Like I said, the drawable comes from >the Python world and which visual it is created with is a bit beyond our >control. The visual in the C world is created as follows (this is in the >function new_gl_handler() in ccpnmr1.0/c/ccpnmr/global/gl_handler.c): > > visual = glXChooseVisual(display, DefaultScreen(display), dblBuf); > >where dblBuf is defined a bit above that line as: > > static int dblBuf[] = {GLX_RGBA, GLX_DOUBLEBUFFER, None}; > >The first two arguments mean: > > GLX_RGBA: If present, only TrueColor and DirectColor visuals are >considered. Otherwise, only PseudoColor and StaticColor visuals are >considered. > > GLX_DOUBLEBUFFER: If present, only double-buffered visuals are >considered. Otherwise, only single-buffered visuals are considered. > >If I use dblBuf as is, or if I remove either but not both of those >arguments, then I get the BadMatch problem. I am not too bothered about >GLX_RGBA but I am about GLX_DOUBLEBUFFER. If I remove both, so have: > > static int dblBuf[] = {None}; > >then I do not get the BadMatch problem. So I end up being able to display >contours. Only the whole thing does not really work properly: the >background is black instead of white, the crosshair does not get >refreshed (so the xor mode is not working), etc. (This is probably >because the Python code pretty much assumes double buffering is working.) >So this is not sorted yet. > >Is there double buffering on these oldish SGIs? I thought there was, but >perhaps not. > >Wayne > >On Tue, 26 Oct 2004, Borlan Pan wrote: > > > >>Unfortunately, neither GL_FALSE and GL_TRUE help. >> >>Borlan >> >>Wayne Boucher wrote: >> >> >> >>>Hello, >>> >>>I've done a bit of a trawl on google and as usual the question appears a >>>few times but not the answer. In particular already back in 1999 someone >>>had this problem with exactly the same note about it working on another >>>display: >>> >>>http://oss.sgi.com/projects/performer/mail/info-performer/perf-99-08/0000.html >>> >>>Someone in 2002 also had this kind problem trying to use another display >>>(so even worse than you are having, but the "X Error of failed request" >>>was different): >>> >>>http://oss.sgi.com/projects/performer/mail/info-performer/perf-02-01/0004.html >>> >>>and said they had tried xhost to sort this out but it did not. >>> >>>Now recently we changed one of the parameters in one of the first OpenGL >>>calls because it was causing the non-drawing of contours on Linux boxes >>>using native Nvidia OpenGL drivers. You could try changing this back to >>>see what happens. So in ccpnmr1.0/c/ccpnmr/global/gl_handler.c in the >>>function new_gl_handler() there is a line: >>> >>> context = glXCreateContext(display, visual, None, GL_FALSE); >>> >>>and you could change this back to: >>> >>> context = glXCreateContext(display, visual, None, GL_TRUE); >>> >>>(it's commented out in the text above the current version). Then type >>>"make" and "cd ../analysis" and "make" and try running Analysis again. >>> >>>If that works then we can try to put both variants in (somehow). (My >>>guess is that it will not solve it but you never know.) >>> >>>Wayne >>> >>> >>> >>>