progs: Fix linking of Xlib demos for non-autoconf builds
The Xlib demos were fixed to use $(X11_LIBS) so that configure could
detect the proper directory to link the library from, but this broke
the non-autoconf builds. Give X11_LIBS a default value to fallback on.
gallium/util: rewrite global constructor system for half floats (GCC/MSVC only!)
NOTE: this commit will cause Gallium to fail to build on any compiler
except GCC, the Microsoft C compiler and compatible compilers that
claim to be one of those.
This commit removes the u_gctors.cpp mechanism, in favor of using
compiler-specific syntax to add global constructors from C files.
This solves the problem of u_gctors.o not being pulled from static
libraries and avoids using C++.
However, it needs compiler-specific support for every compiler.
The Microsoft C compiler support has not been tested.
Reflect the recent addtion of eglut and reorganization of the EGL demos.
This helps remove ~2k lines of duplicated code
$ git diff --shortstat -M 57cc1db87b
18 files changed, 298 insertions(+), 2178 deletions(-)
gallium/util: add fast half float conversion functions
This adds a fast half float conversion facility to Gallium.
Mesa already contains such a facility, but using a much worse algorithm.
This one is an implementation of
www.fox-toolkit.org/ftp/fasthalffloatconversion.pdf
and uses a branch-less algorithm with some lookup tables small enough
to fit in the L1 cache.
Ideally, Mesa should start using these functions too, but I'm not sure
how to arrange that with the current build system.
A new "u_gctors.cpp" is added that defines a global C++ constructor
allowing to initialize to conversion lookup tables at library init.