I've chosen the minimal invasive way for this:
* Import miniz and remove -lz linker flags.
* Create a short header minizconf.h roviding everything we need
originally defined by zconf.h and not provided by miniz.
* Replace zlib.h with miniz.h and minizconf.h.
The input system backend was once used in the client and the renderers,
but for some years now it has been an integral part of the client only.
Move it there.
The last commits did some bigger changes to the interaction between the
GL renderers and the client. The code is now SDL 2.0 conformant, window
and context creation are strictly distinct operations. SDL is only
initialized when necessary. Since this broke the client <-> renderer
API, bump it's version.
There a lot of things left to do for dark and cold winter evenings:
* The software renderer implements it's own window handling and
reinitialized SDL whenever vid_restart is called. This is highly
problematic.
* vid_fullscreen is abused to communicate changes to renderer config
throughout the code. That's a very ugly, messy and potential very
problematic hack. But not easy to remove.
* Some funtion calls between the client and the renderer are
unnecessary.
The changes to the client <-> renderer interaction fixed issue #302.
In the old world we deinitialized and reinitialized SDL each time we
restarted or changed the renderer. That would clear the whole GL state.
In the new world we let SDL running and just recreate the windows. In
some cases parts of the old renderers state would leak into the new
renderer, leading to strange problems.
* Sync both files as much as possible.
* Another round of general cleanup.
* Fix stencil tests.
* Simplify gamma handling, hardware gamma is now default.
* Support new client <-> renderer API.
* Another round of general cleanup.
* Introduce gl3_libgl cvar to force a libGL.
* Fix stencil buffer tests.
* Further untangle window <-> context stuff.
The window is now fully at client side, the context at renderer side.
This is another break of the renderer API. And at least GL1 needs to
track this, it's broken for now.
* Even more syntax and code style fixes.
* Rename functions to match their actual purpose.
* Fix comments.
* SDL initialization and shutdown is now client side only. With
SDL 1.2 finally gone there's no need to involve the renderers
in it.
This breaks the client <-> renderer API. I haven't bumped the API
version with this commit because there're likely more changes when
I'm going through the renderer side of things. The VID backend also
needs a lot of love...
It might be a good idea to move this SDL backend files into the client
and rename them. We'll decide that at a later time.
* Some globals could be made static.
* Add comments were appropriate.
* And format the file to one coding stile. What is so hard with
keeping to one style?! MY IDE is even able to interfere the
style from existing code...
* CDA was only supported of the client was build with SDL 1.2. Our
Windows binaries had no CDA support for years, I'm pretty sure that
it never worked on Linux and no computer build after 2005 has even
the necessary hardware. So let's just remove it.
* X11GAMMA was a hack to work around SDL 1.2s inability to set the
gamma on newer xorg-server versions. It has been broken for some
time now an is rather ugly. Remove it.
This is the first step in removing SDL 1.2 support.
