Add WebGLSampler support
Reference: https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7.13
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cc @jdm @zakorgy
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Migrate to new constructor operation syntax
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Marking everything as `[Throws]` for simplicity sake (and this matches the previous codegen behavior), but we'll want to unmark some of them as not everything throws.
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This patch adds initial support for WebGLSync.
Note:
There is no test for the isSync, deleteSync and waitSync functions in the `conformance2/sync/sync-webgl-specific.html`.
When playing around with Cargo’s new timing visualization:
https://internals.rust-lang.org/t/exploring-crate-graph-build-times-with-cargo-build-ztimings/10975/21
… I was surprised to see the `script` crate’s build script take 76 seconds.
I did not expect WebIDL bindings generation to be *that* computationally
intensive.
It turns out almost all of this time is overhead. The build script uses CMake
to generate bindings for each WebIDL file in parallel, but that causes a lot
of work to be repeated 366 times:
* Starting up a Python VM
* Importing (parts of) the Python standard library
* Importing ~16k lines of our Python code
* Recompiling the latter to bytecode, since we used `python -B` to disable
writing `.pyc` file
* Deserializing with `cPickle` and recreating in memory the results
of parsing all WebIDL files
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This commit remove the use of CMake and cPickle for the `script` crate.
Instead, all WebIDL bindings generation is done sequentially
in a single Python process. This takes 2 to 3 seconds.
Update WebIDL parser
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This includes IDL mixin support.
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Codegen: throw type error when encountering an unknown argument
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FIX#24130
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Support default toJSON in WebIDL
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Ported related lines from gecko.
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Support running WebGL in its own thread or on the main thread.
This is the final missing piece to support WebGL in ANGLE on Windows. ANGLE doesn't support multiple GL contexts on separate threads using the same underlying Direct3d device, so we need to process all GL operations for WebGL on the same thread as the compositor. These changes try to retain enough flexibility to support both approaches so we can get WebGL working on Windows ASAP.
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Implement GetElementProperty wd command
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There are a few canvas2d-related dependencies that haven't updated, but they
only use euclid internally so that's not blocking landing the rest of the
changes.
Given the size of this patch, I think it's useful to get this landed as-is.
