closes #68

Signed-off-by: David Herberth <admin@dav1d.de>

EGL loading was failing for a display of EGL_NO_DISPLAY.
Allow loading EGL 1.5 and above since eglQueryString supports
EGL_NO_DISPLAY in this case.

`wglGetProcAddress` is `APIENTRY` and gets casted into
a non APIENTRY function pointer, which leads to issues
on platforms that actually use APIENTRY (e.g. win32)

closes: #240

also:
* updates all the bundled specifications
* adds missing Rust types

see gh: #243

current warnings:
 * clippy::missing_safety_doc
 * clippy::too_many_arguments
 * clippy::unused_unit
 * clippy::unreadable_literal

disables all warnings to prevent future issues

closes: #249

closes: #252

closes: #142

closes: #258

gh: #253

closes: #227

gh: #241

Memoize has an uncapped cache size, the cache is scoped to the
global function and never expiring, this attaches the cache
to the class instance instead of the function/method.
This makes it so the GC has a chance of collecting the instance
and with it the cache.

closes: #256

gh: #264

gh: #265

gh: #271, #272

closes: #274

The API in the require was honored before, but when the symbol from one
API require referenced the symbol from a different API require through
an alias, it was still brought in.

gh: #281

this is just a quick fix, if custom_declarations is later
required to be always generated, it probably makes sense to
have a separate block with better naming

gh: #279

closes: #293, #294, #209

Co-authored-by: Oleg Ageev <my@cnonim.name>

Check for a defined variable instead of a 1/0 flag, for symmetry with
GLAD_GL, GLAD_GLES2 and other user-facing defines.

closes: #459

…es (#494)

Window did not respond properly to closing via the 'x' button.  Tested
on Windows 10.

closes: #508

closes: #511

See: #526

On a UNIX system without X11 libraries, it's impossible to have libGL.so
and glXGetProcAddressARB(). Currently GLAD would fail to load GL symbols
in this case.

Try also loading libEGL.so/libEGL.so.1 in OpenGL loader and fallback to
eglGetProcAddress() to query GL symbols if glXGetProcAddressARB() isn't
available.

Since EGL version 1.5 released in 2014, it's required for
eglGetProcAddress() to be able to query all client API functions instead
of only extensions, which is quite early for a Wayland-only display
stack, thus no function check or another fallback logic is added.

Signed-off-by: Yao Zi <me@ziyao.cc>