Unbundle OpenCV

[drzraf]

OpenCV 3.1 headers were bundled.
Let's compile against OpenCV version provided by the system (eg: 3.4)

[drzraf]

Dropping 106.900 lines from the repository, a greener compilation and more flexibility to compile against a different (= newer) version of OpenCV
RTBC?

[l00mi]

@drzraf If I remember correctly, this was mostly done for the Windows (and probably osX) Version. Could you test if these work still after bundled?

[hsm4]

In our SLProject we removed all prebuilt libraries within sub repositories. In the same step, we migrated the project to cmake. We now download the prebuilt libraries platform dependent from our server within the cmake generation step.

[drzraf]

if I understand correctly @l00mi, it would not be so much about Windows/OSX release (although binary releases needs testing before this get commited) but about Windows/OSX compilation, right?

Indeed, with this commit, most OpenCV headers need to be provided by the host compiling ImagePlay. While it's rather easy on on GNU/Linux, I don't know about Windows.
I understand that having a such a windows script to download headers and/or precompiled shared libraries could help windows-users who intend building.

Sadly, not using Windows nor OSX myself, I really can't help on this part.

[hudrima1]

At the moment we link SLProject against opencv 3.4.1 with contributions. We provide prebuilt librararies for win64, macos, ios and android but not for linux.

[extrowerk]

I have unbundled opencv in the ImagePlay Haiku port, maybe you can reuse my patches:
https://github.com/haikuports/haikuports/blob/14c2cab5428145b93232cb69683a67bbe68a9f06/media-gfx/imageplay/patches/imageplay-6.1.1%7Egit.patchset