These are based on Eigen and will basically get compiled away into ideal
representations for each platform conky is compiled for. This means that
many operations can be SIMD optimized with very little effort.

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

This should help avoid bad pointer reinterpretation.

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Also fixed bad previous substitutions. Will go through all of them at
the end just in case, though this time I replaced them one component at
a time.

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Added intermediate member access structures which map direct
member access and mutation into indirect one as provided by eigen an
most other representations. This should _almost_ always just work, but
in some cases template specialization consuming these values might fail
in which case dereferencing them should work.

Sadly there's no way of providing `T&` access to values because actual
data layout and representation can be wildly different between different
architectures. Even if eigen wasn't being used, if we want to make use
of SIMD we have to provide access through separate getters and setters.

All this abstraction should be optimized away by the compiler, so it's
just adding API ergonomics.

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Removed screen_width/height as the functionality is covered by workarea.
This deduplicates information as we don't care about actual screen size
if workarea is set by xinerama.

Also set workarea from wayland output geometry callback. It's used by
conky.cc by both Wayland and X11, so this should be useful towards having
that function update window position correctly on Wayland.

Removed all X11 specific types from gui.h, as well as X11 imports. This
only leaves X11 specific gui settings which is fine for now - though
they should be moved to x11 headers once Wayland makes use of common
ones that can be shared (i.e. we check which make sense to move).

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

- Added imports that would be missing without Eigen.
- Made point & rect work better if Eigen::Array was replaced by std::array.
- Removed templates around getters and setters.
- Replaced internal _member_access with direct invocation.

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Didn't use most eigen functionality anyway and it was only added for
simple SIMD support. Decided to implement (WIP) SIMD instructions myself
as we don't have any very advanced use cases.

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>