overview of OpenGL
the OpenGL product
64-bit OpenGL allows “large data space” because the pointers are now 64-bit. But, the OpenGL data types themselves are the same as the
32-bit library. For example, GLint is a 32-bit integer, not a 64-bit long.
All 64-bit OpenGL libraries are located in
/opt/graphics/OpenGL/lib/pa20_64. The following sample compile and link lines may help you to build your application once it has been ported to take advantage of 64-bit capabilities:
Sample 32-bit compile and link:
cc-g -Aa -D_HPUX_SOURCE -z -I/opt/graphics/OpenGL/include\ -I/usr/include/X11R6 -o cube.32 cube.c -L/opt/graphics/OpenGL/lib\
-L/usr/lib/X11R6 -ldld -lGLU -lGL -lXHP11 -lXext -lX11 -lm
Sample 64-bit compile and link (for 11.x only):
cc -g -Aa +DA2.0W -D_HPUX_SOURCE -z
-I/opt/graphics/OpenGL/include -I/usr/include/X11R6 -o cube.64 cube.c -L/opt/graphics/OpenGL/lib/pa20_64 -L/usr/lib/X11R6/pa20_64 -L/usr/lib/pa20_64 -L/usr/lib -ldld\ -lGLU -lGL -lXHP11 -lXext -lX11 -lm
using libGL in 64-bit together with the +compat linker option Because of a limitation in the 64-bit linker, if the +compat linker option is used, -lc must appear in the link order before -lGL. Otherwise, a segmentation violation will occur when running the linked program.
The following partial compile line shows the relevant order:
cc +DA2.OW prog.c -Wl,+compat
-L/opt/graphics/OpenGL/lib/pa20_64 -lc -lGL
When not using -Wl,+compat, the link order should have -lGL before -lc. By default, cc implicitly links in -lc as the last library in a link. Without Wl,+compat, a partial compile line is:
cc +DA2.OW prog.c -L/opt/graphics/OpenGL/lib/pa20_64 -lGL -lc
or
cc +DA2.OW prog.c -L/opt/graphics/OpenGL/lib/pa20_64 -lGL
SLS support
When the display is in a multi-display configuration using the XServer Single Logical Screen (SLS) extension, OpenGL can and will render to windows on or spanning any of the SLS displays. This rendering is done
