This increases the size of the library, but avoids some of the
concerns that have been brought up with the library silently switching
you from glWhateverEXT() to glWhatever() if there might be slight
behavior differences between the two that hadn't been identified. The
downside is that it means we can't share the resolver functions among aliases.
This fixes crashes on ARM's Mali drivers, where desktop GL isn't
supported, and epoxy didn't notice the error and tried to dlsym() on
libGL.so.1.
An alternative would have been to look at the response from
eglQueryAPI() first, but that would have meant that we still need to
BindAPI in the case that eglQueryAPI returns something like VG or CL,
and so we needed to handle these errors regardless.
Fixes#22
Epoxy dlsym()s directly into libEGL instead of using dlsym() on a NULL
handle, so we can't relying on ELF resolution like we do for dlopen().
Instead, just override epoxy's function pointers for the functions
epoxy will call in the process of getting one of these bootstrap
functions.
This is a lot shorter to type, and still gets the dependencies to work
(tested with touch src/dispatch_common.c; make check, and touch
src/egl_common.c; make check).
When initially writing the Makefiles, I started from a Makefile.am
that had ajax's copyright instead of an Intel one. The only line I
can see that's left from the original Makefile.am is "pkgconfigdir" in
the root Makefile.am.
In addition to the failing testcase, there were a couple of
regressions in piglit's attribs test: one from glBegin_unwrapped vs
glBegin confusion in the __asm__ directives we were generating, and
one where the function pointers apparently were just getting mixed up
at application runtime.
For the dynamically-linked tests, it wasn't a big deal because the
updated library was always picked up. But for glx_static, we were
actually testing stale code.
Note that the generated code is still generated, they just aren't
built and installed. The goal with that is that someone could take
the built .c and .h files and drop it into their own project, if they
want to avoid shared libs.
This totally replaces the getprocaddress and dlsym code, which was
basically just stubs up until now. The is_glx/is_egl() is also
dropped -- they weren't doing anything, and the only false answer they
could give is if the dlopen were to fail.
Eric Anholt
Matt Turner