vo_opengl: move FBO helper to gl_utils

This is somewhat messy, because fbotex_init() itself was depending on
some gl_video parameters unrelated to FBO creation (like what scaler was
in use - what the fuck did this check do in this function?), so this
commit does a bit more than moving code around. In particular, the FBO
for the separate scaling intermediate step now always uses GL_NEAREST
sampling, and all FBOs are destroyed/recreated on renderer
reinitialization.

This also moves the function matrix_ortho2d() - trivial enough not to
put it into a separate commit.

0 files changed, 0 insertions, 0 deletions