79 lines
1.8 KiB
Rust
79 lines
1.8 KiB
Rust
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use tiny_skia::Pixmap;
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use crate::{
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render::{Renderer, RendererLimits},
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system::System,
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value::{Ref, Reticle, Value, Vec2},
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vm::{Exception, Vm},
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};
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#[derive(Debug, Clone, Copy)]
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pub struct Trampoline {
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pub value: Value,
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}
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// NOTE: This must be kept in sync with haku.js.
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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#[repr(u8)]
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pub enum Cont {
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Scribble,
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Dotter,
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}
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impl Trampoline {
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pub fn new(init: Value) -> Self {
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Self { value: init }
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}
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pub fn cont(&self, vm: &Vm) -> Cont {
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let Some((_, refv)) = vm.get_ref_value(self.value) else {
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return Cont::Scribble;
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};
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match refv {
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Ref::Reticle(_) => Cont::Dotter,
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_ => Cont::Scribble,
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}
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}
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pub fn scribble(
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&mut self,
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vm: &Vm,
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pixmap: &mut Pixmap,
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translation: Vec2,
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limits: &RendererLimits,
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) -> Result<(), Exception> {
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let mut renderer = Renderer::new(&mut *pixmap, limits);
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renderer.translate(translation.x, translation.y);
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renderer.render(vm, self.value)
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}
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pub fn dotter(
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&mut self,
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vm: &mut Vm,
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system: &System,
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from: Vec2,
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to: Vec2,
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num: f32,
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) -> Result<(), Exception> {
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let (_, vref) = vm.get_ref_value(self.value).expect("value must be a ref");
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let &Ref::Reticle(Reticle::Dotter {
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draw: Value::Ref(draw_id),
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}) = vref
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else {
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panic!("value must be a dotter reticle");
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};
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let dotter = vm.create_ref(Ref::Closure(system.create_dotter(
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from.into(),
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to.into(),
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num,
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)))?;
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let value = vm.run(system, draw_id, &[Value::Ref(dotter)])?;
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self.value = value;
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Ok(())
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}
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}
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