Per comment from kreator, some Apple systems now ship without a working
print screen key. It makes no sense to provide print screen support
bound to a key which does not exist. Add `screenshot=none` and activate
it on OS X to remove the unreachable screenshot support.
Commit 131c1b9f4d added support for PNG screenshots and made this support a default build option. Set screenshot=legacy in the project file for macOS's Xcode for all out-of-the-box builds. PNG support has been dropped in Xcode for several reasons:
- macOS creates PNG screenshots via Command-Shift-3. This works in DXX-Rebirth, even in full screen mode.
- The macOS screenshots are put on the desktop, as opposed to in the user's Library (which is normally hidden from view and can only be accessed via 'Go' menu holding down Option)
- Macs have no Print Screen key
- There is no simple way to include libpng with the macOS DXX-Rebirth binaries, and the average Mac user is unlikely to install it from source
When building with scons, the Mac user compiling can do one of two things:
- Install libpng (which is much easier than packaging with a binary)
- Pass screenshot=legacy to scons
Add -O0 flags for the Debug and Editor builds in Xcode, setting optimisation to None so the Xcode debugger reports on all variables, steps through code correctly and otherwise can debug properly.
