As in, before element properties were populated. This broke everything that depended on can_move, probably most notably particle displacement based on the Weight property. It didn't help that once element properties were populated, any secondary call to init_can_move would fix the symptoms, such as when any custom element is added with Lua.
Newer saves include an element palette which maps save-space element numbers to element identifier strings, see 29189693b3. This is useful because the numbers of custom elements can change, while their identifiers are expected to not change. Not all elements make it into the palette, only the ones that are in use in the save.
98.0 is staged to extend this feature in two ways. First, it'll warn the user of missing custom elements when loading a save that uses such elements, see 36800a76cd. Second, it'll do a better job of deciding what to put in the element palette, see a13c29875f.
In order for detection of missing elements to work, a save's palette has to account for every element number used in the save, including built-in elements. To dispel a misunderstanding regarding that last part: yes, including built-in elements is not crucial if the set of built-in elements only ever grows, but this is not guaranteed.
98.0 creates such palettes, but older code didn't, for various reasons. One reason is that the palette at some point wasn't meant to include built-in elements, see e0d982367b, although this was rectified later in 67b87b1dab. Another reason is that not all cases of element numbers encoded in particle properties were considered, see for example f45d0d1683 and 1f1062408c.
Palettes in existing saves being thus incomplete didn't use to be a problem because older code would just assume that whatever element number wasn't listed in the palette referred to a built-in element and would just map such save-space element numbers to the same simulation-space element number, hence identity mapping.
However, this approach doesn't cover custom elements whose numbers can change, nor does it cover extra built-in elements added by a mod. Worse, a different mod with different extra built-in elements may map save-space element numbers not listed in the palette to its own extra elements.
As a solution to these problems and making use of the fact that palettes are now complete and comprehensive, 98.0 no longer does this default identity mapping, see 73be29aa61. Removing this identity mapping in itself would have broken older saves that use the old identifiers of some elements; that commit works around that by remapping these early in the loading process. By the way, these changes in identifiers are perfect examples of the set of built-in elements changing in ways other than growing.
This still doesn't address the problem in the case of pre-98.0 saves though. Such saves have seemingly valid element numbers (although it's impossible to tell whether these refer to built-in elements from vanilla or extra built-in elements from a mod) but no corresponding entry in their palettes. The user is warned about such elements also, see 9f8449357f. Lacking a better solution, this commit assumes that these elements are indeed vanilla elements and re-enables the default identity mapping for such saves.
In summary, this commit fixes the loading process for saves that were made in 97.0 or some older version and use built-in vanilla elements in ways that didn't trigger their inclusion in the element palette.
For example, until a13c29875f, CONV's tmp was not considered by the palette code, so any CONV with tmp set to an element that wasn't a built-in vanilla element, and which also wasn't used anywhere else in the save, would have been potentially corrupted by the loading process. An example a save that demonstrates this behaviour is id:2633868, which has CRAY particles on the right with ctype set to LIGH, but until this commit, these ctypes would have been set to 0 and the user would have been warned about element number 87 (LIGH) missing from the palette.
I have absolutely no idea. The error in question is the following:
wasm-ld: error: /home/lbphacker/.emscripten_cache/sysroot/lib/wasm32-emscripten/lto/libhtml5.a(callback.o): attempt to add bitcode file after LTO (_emscripten_run_callback_on_thread)
I have no idea where we use _emscripten_run_callback_on_thread, and I have no idea why LTO would think it's not required when it's obviously required. This commit fixes it by holding the linker's hand even more than it already had.
SaveRenderers populate their own Simulation with Simulation::Load, which may call various callbacks now that these SaveRenderers know about custom elements. Make sure these callbacks don't try to call into the main thread's Lua state.
Seeing as these callbacks now need to be protected from races too, the scopes of some of the exclusive locks of the graphics property mutex needed to be extended.
Mostly. They are now const but only in graphics functions called from secondary Renderers. The primary (main thread) Renderer still allows graphics functions to mutate Simulation; this is required for correct in-PIPE rendering of custom elements.
And a bunch of other member functions. This got rid of some nasty assumptions documented only in the form of comments, in exchange for some nasty template nonsense.
By factoring element and other static-ish data out of Simulation and protecting basic graphical element properties (i.e. everything that contributes to graphics other than the Graphics callback) with an std::shared_mutex. This is taken exclusively (std::unique_lock) by the main thread when it changes these properties, and inclusively (std::shared_lock) by non-main-thread code that uses Renderer.
This also requires patching CREATEPROCESS_MANIFEST_RESOURCE_ID out of powder-res.template.rc because Meson generates a VS config that instructs VS to add its own and this conflicts with ours. TODO: Undo this hack once https://github.com/mesonbuild/meson/pull/12472 makes it into a release.
Also start using meson compile in place of ninja in some cases because it integrates better.
Rather than member function pointers, which are not necessarily simple pointers and are not necessarily convertible to void * sensibly. This also gets rid of the last instance of lua_pushlightuserdata, which apparently isn't super well-supported by luajit, and which thus often crash on android.
This causes a crash when using luajit on aarch64 Android builds. I didn't remove the lua_pushlightuserdata usage in LuaLuna.h because that's external code and beyond my understanding
Thus dropping the minimum required libcurl version to at least 7.64, possibly further. We have compatibility macros all the way to 7.55 so yeah.
Also fix RequestManagerImpl::~RequestManagerImpl not doing a wakeup after setting running = false. This meant that in the worst case the worker would wake up 1000ms later and only then notice running = false and exit, making the game take overall longer to exit.
That is, in some cases (read: starcatcher, which uses the very last component of the user agent to determine the build ID), you'd get all changelog entries ever, not only the ones between the current version and the one the update server has.
