Just a minimal support to get single-mesh conversion working with
GltfSceneConverter. The whole thing has to be subsequently reworked to
not be oriented around meshes, but this is the first step.
I'm going to add quite a few features to this one, and doing that
without any regression tests whatsoever would be a misery. Same needs to
eventually be done for the imageconverter and other utils. No bugs found
here, fortunately, except for one message update -- otherwise the
verbose output would contain (1/2) but never (2/2) which may be
confusing.
At the moment the testing is done only on Unix -- originally I wanted to
postpone this until something like Utility::System::execute() is
implemented, with proper argument escaping and output redirection, but I
simply DO NOT HAVE TIME to do that properly now. So instead it's calling
into std::system(), assumes there is no whitespace in the arguments, and
assumes a Unix shell with stdout/stderr redirection to a file. Ugly and
probably way slower than necessary, but works.
For some reason, it was adding also the magnum / magnum-d directory,
which isn't really useful, especially in cases where the directory is
not at all or it's desired to pick a debug plugin from a release
executable and vice versa.
Also the distancefieldconverter was still attempting to join with an
absolute path -- somehow 7fb63a9434 missed
this one.
I really need to write regression tests for all this, sigh.
It was quite a pile, and all of it was written just once, relying only
on hopefully-available model files that would hopefully touch most code
paths. Which means, extremely annoying to make changes in.
I extracted the code to a header that can be tested with a mocked-up
importer and without having to execute the utility itself, deduplicated
the image info printing code, fixed various inconsistencies (such as
data/field flags sometimes denoted with superfluous "flags:" and
sometimes not) and TODOs (such as 2D/3D skins, where there was no format
whatsoever that would have 2D skin support, so the code couldn't get
written).
Now it's finally possible to easily add the remaining missing features,
such as printing camera info.
Similar to the change done in Corrade, see the commit for details:
878624ac36
Wow, this is probably the most backwards-compatibility code I've ever
written. Can't wait until I can drop all that.
The boring dry usage info grew significantly, and listing it as the
first thing on the page would scare people off. Put the examples first
instead, and for the imageconverter and sceneconverter add --info
listing examples, as that's what is eye-catchy.
Counterpart to d07b6a2bb4, which did this
for sceneconverter (I should really do changes in both at the same
time). Additionally, it's not saying "uncompressed" for images anymore,
since it's more confusing than just saying nothing, especially when
block-compressed formats are involved.
For animations, scenes, meshes and images, where the memory impact is
measurable. For others such as materials or cameras the memory impact is
either unclear (depending on the final representation) or so small it's
not important.
I realized those are too annoying when writing a glTF exporter which
contains a lot of switches over enums. And as further shown by the diff,
those were only inflicting additional pain in *all* switch statements,
nothing else, no other added value. And everywhere else the helpers are
the designated way to deal with those, so there's no point in having an
explicit enum value denoting start of a "custom range".
It wasn't even any convenient to have it in the enum, as the extra
effort needed for casting actually made it *exactly* the same length as
if I'd just use a separately-defined constant.
As it's expected that there's a lot of objects, this prints just a
compact two-line info for each -- reference count, name and a list of
fields, with [n] in case a field is repeated. The field types are listed
in SceneData.
Field contents don't seem to be that important in this case (compared to
knowing which meshes/.. are referenced and how much, which is quite
essential) and would bloat the output a lot. I might add this as some
verbose option eventually, if needed, but I don't think it will be.
Because the uncolored overly verbose output was ridicilously ugly and
hard to navigate for larger scenes. Like with TestSuite executables,
there's a --color option that defaults to automatic coloring based on
whether printing to a TTY and can be both explicitly enabled and
disabled.
We don't have a string-to-int API that can take non-null-terminated
string views yet, but we have this. And that's a much better fit in this
case.
This stripped further 4 kB off the release binary size (178 kB before,
158 after). Fully inlined STL containers and algorithms are a very good
idea, yes.
What a stupid idea, cuz now it's impossible to know which attribute has
which ID, so using --only-attributes is just a total guesswork,
resulting in meshes that have no positions or other nightmare scenarios.
NOT a good idea, past mosra.
By the way, removing the std::sort() stripped 16 kB off the release
binary size (178 kB before, 162 after). Fancy, C++, very fancy.
Vladimír Vondruš