28c3e929ca
The bindings under src/wit are generated from the pumpkin-plugin-wit submodule by tools/gen.zig. The canonical ABI is handled at comptime in src/abi.zig, so plugins are plain wasm32-freestanding modules and only need wasm-tools to become a component. On top of that there is a small hand written layer: plugin registration, typed event handlers, declarative commands (cmd), text components from struct literals (msg) and std.log support.
61 lines
1.3 KiB
Plaintext
61 lines
1.3 KiB
Plaintext
package demo:gen@1.2.0;
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interface types {
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/// Where something is.
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record point {
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x: s32,
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y: s32,
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/// Optional label.
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label: option<string>,
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}
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enum color { red, green, blue }
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flags access { read, write, exec }
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variant shape {
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nothing,
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circle(f32),
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polygon(list<point>),
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}
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type pair = tuple<u8, f64>;
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type names = list<string>;
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}
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interface host {
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use types.{point, color, shape, access};
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resource canvas {
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constructor(width: u32, height: u32);
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/// Opens a canvas stored on disk.
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open: static func(path: string) -> result<canvas, string>;
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draw: func(shape: shape, at: point, color: color);
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/// Copies `other` on top of this canvas.
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blend: func(other: borrow<canvas>, types: access);
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name: func() -> option<string>;
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}
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/// Shows the canvas and closes it.
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present: func(canvas: canvas) -> u64;
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log: func(message: string);
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}
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interface guest {
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use types.{point};
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describe: func() -> point;
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}
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world plugin {
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use host.{canvas};
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use types.{shape, pair};
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import host;
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export guest;
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export start: func(canvas: canvas) -> result<_, string>;
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export measure: func(shape: shape, scale: pair) -> f32;
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export stop: func();
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}
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