Removed old wxGLCanvas stuff; moved wxTreeLayout to wxWindows; corrected some doc...

[wxWidgets.git] / utils / glcanvas / motif / readme.txt

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-GLCanvas class for wxWindows 1.66 using the GLX protocol extension
-==================================================================
-
-I have just uploaded a file 'wx166glx.tar.gz' to the wxWindows
-incoming directory.  It contains an implementation of a GLCanvas class
-(interfacing an ordinary wxCanvas with OpenGL calls) for X11 (I tested
-with Motif, maybe it works with XView as well).  I tried to imitate
-what Julian did in 'wxmesa1.zip' for MS Windows in conjunction with
-the Mesa library.
-
-Of the several possibilities to use OpenGL under X11, I chose the GLX
-server extension, because it is the most efficient method on machines
-with graphics hardware support (I expect wxWindows/OpenGL applications
-to _fly_ on my Indy :-).  However, you don't need a 'real' OpenGL
-implementation to use GLCanvas -- the free Mesa library has a
-simulated GLX interface built-in.  Just link in libMesaGLU and
-libMesaGL along with libwx_motif and everything should work fine.
-
-Installation:
-
-Untar wx166glx.tar.gz from your main wxWindows directory (i.e. where
-the `include' and `src' subdirectories are).  Then apply the small
-patch file which has appeared in the `glx' subdirectory:
-
-% patch -p0 < glx/wx166-glx.diff
-
-Recompile the wx_motif library in the standard way.  The inclusion of
-the GLCanvas class in libwx_motif is protected with a new 'USE_GLX'
-flag in wx_setup.h, so it could maybe be included in a future
-wxWindows release (with USE_GLX turned off by default).
-
-Two new samples (bounce and prim) are included.  I adapted them from
-wxmesa1.zip -- they should compile under both MS Windows (with wxMesa)
-and X11.  The makefile.unx's are set up for the Mesa libraries; if you
-have original libGLU/libGL's just change the GLLIBS = ... line.
-
-Problems:
-
-One more or less serious problem remains: the visual generated by the
-GLCanvas class must match the visual of wxCanvas.xwindow (which
-currently is always the screen's default visual).  The end result is
-that you will get a nice RGB mode for OpenGL only if your display's
-default visual is TrueColor or DirectColor (the XFree86 S3 servers for
-PCs with the '-bpp 16/32' option are examples).  I'm contemplating a
-solution where the wxCanvas drawingarea widget is destroyed and then
-re-created from within the GLCanvas constructor.  I would welcome
-suggestions on this and discussions of the GLCanvas 'API'.
-
-Regards,
-
-Wolfram Gloger.
-(Gloger@lrz.uni-muenchen.de)