Two findings from a sweep over the WGSL prelude and the position widgets, scoped against upstream/main atca2b4b2. `module_source` already builds each shader's preamble from iris_core's own constants, so the move-chain work's second copy of `MOVE_NONE` and `CHAIN_LIMIT` -- under "keep in step with iris_core::CHAIN_LIMIT" -- asked a reader by hand for what the mechanism beside it exists to do. Both are injected now, with `MASK_NONE` beside them replacing a bare literal, and the shader declares none of them. `Scroll`'s `content_len` is never less than its box, so `slack` and the `anchor` computed from it were always zero whatever the alignment: the framework centres short content by placing the answer in the whole box, and the comment credited arithmetic that could not have done it. The same belief guarded the fits-in-the-box contract with `align == NEG`, so at the default alignment -- the middle -- every box change redrew the scroll, measured as 1 widget against 0 at TOP_LEFT. `align` now has no reader at all. `UiSpan::translated` and `UiRegion::translated` are reachable only from each other and from nothing else. Format, clippy with and without layout-diagnostics, and the 131-test suite are clean. The cold dump over 400 depth-5 trees is byte-identical to1096c31, and all three seed scans pass: 400 at depth 5 in 69.07s, 1,000 at depth 6 in 169.29s, 2,000 at depth 4 in 300.75s. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
iris
My experimental attempt at a rust ui library (also my first ui library).
It's currently designed around using retained data structures (widgets), rather than diffing generated trees from data like xilem or iced. This is an experiment and I'm not sure if it's a good idea or not.
Examples are in examples, eg. cargo run --example tabs.
Goals, in general order:
- does what I want it to (text, images, video, animations)
- very easy to use ignoring ergonomic ref counting
- reasonably fast / efficient (a lot faster than electron, save battery life, try to beat iced and xilem)
dev details
not targeting web rn cause wanna use actual nice gpu features & entire point of this is to make desktop apps / not need a web browser
general ideas trynna use rn / experiment with:
- retained mode
- specifically designed around wgpu so there's no translation
- postfix functions for most things to prevent unreadable indentation (going very well)
- events can be done directly where you draw the widgets
- almost no macros in user code & actual LSP typechecking (variadic generics if you can hear me please save us)
- relative anchor + absolute offset coord system (+ "rest" / leftover during widget layout)
- single threaded ui & pass context around to make non async usage straightforward (pretty unsure about this)
- widgets store outside of the actual rendering so they can be moved around and swapped easily (unsure about this but seems to work good for now)
under heavy initial development so not gonna try to explain status, maybe check TODO for that; sizable chance it gets a rewrite once I know everything I need and what seems to work best
it's called iris because it's the structure around what you actually want to display and colorful