This requires a LOT of tricky code, mostly due to the format itself being,
er, not the most straightforward.
Everything is converted to existing RGBLINK concepts (sections, patches,
etc.), so the core code is essentially unchanged.
(A couple of genuine RGBLINK bugs were uncovered along the way, so some of
the core code *is* changed, notably regarding `SECTION FRAGMENT`s.)
All of this code was clean-roomed, so SDCC's GPLv2 license does not apply.
Not hooked to all RGBGFX flags yet, but good enough for most use cases
(and as a base for future development, should I need to `reset --hard`.)
TODOs marked appropriately.
Force version.c to be compiled as C++ (bodge, will need a proper fix for `version.c`)
Remove user-defined `ProtoPalette` assignment operator (same as default, anyway)
Currently missing from the old version:
- `-f` ("fixing" the input image to be indexed)
- `-m` (the code for detecting mirrored tiles is missing, but all of the
"plumbing" is otherwise there)
- `-C`
- `-d`
- `-x` (though I need to check the exact functionality the old one has)
- Also the man page is still a draft and needs to be fleshed out
More planned features are not implemented yet either:
- Explicit palette spec
- Better error messages, also error "images"
- Better 8x16 support, as well as other "dedup unit" sizes
- Support for arbitrary number of palettes & colors per palette
- Other output formats (for example, a "full" palette map for "streaming"
use cases like gb-open-world)
- Quantization?
Some things may also be bugged:
- Transparency support
- Tile offsets (not exposed yet)
- Tile counts per bank (not exposed yet)
...and performance remains to be checked.
We need to set up some tests, honestly.
Enhances some warnings as well as the sanitizers (Clang especially complained about it)
The `-f*` flags are to get better stack traces out of the sanitizers, as recommended
by Clang's docs: https://clang.llvm.org/docs/AddressSanitizer.html#usage
GCC's docs claim that these optimizations should not hinder the debugging
experience, and Clang's don't mention optimization flags at all.
Remove already-enabled warnings as pointed out by #969
Comments added to the CMakeLists because the Makefile format does not really allow them
"Plain" list also sorted alphabetically, the rest (somewhat) thematically
