Create a common-api crate to make it easier to write a wasm guest
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GPG Key ID:
FEC9E2FC15235964
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@ -0,0 +1,147 @@
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use crate::{lyra::api::ecs::ComponentInfo, Component, ComponentSerializationError};
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use std::collections::VecDeque;
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use std::io::Read;
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#[derive(Default)]
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pub struct ComponentBundle {
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pub(crate) bundle: Vec<u8>,
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pub(crate) infos: Vec<ComponentInfo>,
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}
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impl ComponentBundle {
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pub fn new() -> Self {
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Self::default()
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}
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pub fn push<C: Component>(&mut self, c: C) {
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let info = C::component_info();
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self.infos.push(info);
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c.to_bytes_into(&mut self.bundle).unwrap();
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}
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}
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pub trait Bundle: Sized {
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fn component_info() -> Vec<ComponentInfo>;
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fn to_bytes(self) -> Result<Vec<u8>, ComponentSerializationError>;
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fn from_bytes(bytes: Vec<u8>) -> Result<Self, ComponentSerializationError>;
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}
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macro_rules! impl_into_bundle_tuple {
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($last: tt, $( $name: tt ),+) => {
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#[allow(non_snake_case)]
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impl<$($name: Component,)* $last: Component> Bundle for ($($name,)* $last,) {
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fn component_info() -> Vec<ComponentInfo> {
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vec![$($name::component_info(),)+ $last::component_info()]
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}
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fn to_bytes(self) -> Result<Vec<u8>, ComponentSerializationError> {
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let ($($name,)+ $last,) = self;
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let mut bytes = vec![];
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$(bytes.extend($name.to_bytes()?.into_iter());)+
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bytes.extend($last.to_bytes()?.into_iter());
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Ok(bytes)
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}
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fn from_bytes(bytes: Vec<u8>) -> Result<Self, ComponentSerializationError> {
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let len = {
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let mut acc = 0;
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$(acc += $name::component_info().size;)+
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acc
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};
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if bytes.len() < len as _ {
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return Err(ComponentSerializationError::ExpectedEndOfBuffer);
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}
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let mut bytes = VecDeque::from(bytes);
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$(
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let info = $name::component_info();
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let mut part_bytes = Vec::new();
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part_bytes.resize(info.size as _, 0u8);
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bytes.read_exact(&mut part_bytes)
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.map_err(|_| ComponentSerializationError::ExpectedEndOfBuffer)?;
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let $name = $name::from_bytes(&part_bytes)?;
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)+
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let info = $last::component_info();
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let mut part_bytes = Vec::new();
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part_bytes.resize(info.size as _, 0u8);
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bytes.read_exact(&mut part_bytes)
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.map_err(|_| ComponentSerializationError::ExpectedEndOfBuffer)?;
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let $last = $last::from_bytes(&part_bytes)?;
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Ok(($($name,)+ $last,))
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}
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}
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impl_into_bundle_tuple!($( $name ),+);
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};
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($only: tt) => {
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#[allow(non_snake_case)]
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impl<$only: Component> Bundle for ($only,) {
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fn component_info() -> Vec<ComponentInfo> {
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vec![$only::component_info()]
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}
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fn to_bytes(self) -> Result<Vec<u8>, ComponentSerializationError> {
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let mut bytes = vec![];
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bytes.extend(self.0.to_bytes()?.into_iter());
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Ok(bytes)
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}
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fn from_bytes(bytes: Vec<u8>) -> Result<Self, ComponentSerializationError> {
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let mut bytes = VecDeque::from(bytes);
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let info = $only::component_info();
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let mut part_bytes = Vec::new();
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part_bytes.resize(info.size as _, 0u8);
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bytes.read_exact(&mut part_bytes)
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.map_err(|_| ComponentSerializationError::ExpectedEndOfBuffer)?;
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let $only = $only::from_bytes(&part_bytes)?;
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Ok(($only,))
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}
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}
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#[allow(non_snake_case)]
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impl<$only: Component> Bundle for $only {
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fn component_info() -> Vec<ComponentInfo> {
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vec![$only::component_info()]
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}
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fn to_bytes(self) -> Result<Vec<u8>, ComponentSerializationError> {
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let mut bytes = vec![];
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bytes.extend(<Self as Component>::to_bytes(&self)?.into_iter());
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Ok(bytes)
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}
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fn from_bytes(bytes: Vec<u8>) -> Result<Self, ComponentSerializationError> {
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let mut bytes = VecDeque::from(bytes);
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let info = $only::component_info();
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let mut part_bytes = Vec::new();
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part_bytes.resize(info.size as _, 0u8);
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bytes.read_exact(&mut part_bytes)
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.map_err(|_| ComponentSerializationError::ExpectedEndOfBuffer)?;
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let $only = $only::from_bytes(&part_bytes)?;
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Ok($only)
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}
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}
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};
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}
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//impl_into_bundle_tuple!(C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16 );
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impl_into_bundle_tuple!(C1, C2);
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@ -0,0 +1,70 @@
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use std::alloc::Layout;
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use crate::lyra::api::ecs::{ComponentInfo, WasmTypeId};
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impl ComponentInfo {
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pub fn of<C: Component>() -> Self {
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let layout = Layout::new::<C>();
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Self {
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size: layout.size() as _,
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alignment: layout.align() as _,
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type_id: WasmTypeId::of::<C>(),
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}
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}
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}
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#[derive(Debug)]
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pub enum ComponentSerializationMethod {
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/// Serializes the component into bytes using [`bytemuck::bytes_of`].
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Bytemuck,
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/// Serializes the component into bytes using
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/// [bincode](https://github.com/bincode-org/bincode).
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Bincode
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}
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#[derive(Debug, thiserror::Error)]
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pub enum ComponentSerializationError {
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#[error("{0}")]
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Bytemuck(bytemuck::PodCastError),
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#[error("unexpected end of buffer")]
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ExpectedEndOfBuffer,
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}
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pub trait Component: Sized + 'static {
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const SERIALIZATION: ComponentSerializationMethod;
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fn component_info() -> ComponentInfo;
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fn to_bytes(&self) -> Result<Vec<u8>, ComponentSerializationError>;
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fn to_bytes_into(&self, target: &mut Vec<u8>) -> Result<(), ComponentSerializationError>;
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fn from_bytes(bytes: &[u8]) -> Result<Self, ComponentSerializationError>;
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}
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#[macro_export]
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macro_rules! bytemuck_component_impl {
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($type:ident) => {
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impl common_api::Component for $type {
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const SERIALIZATION: common_api::ComponentSerializationMethod = common_api::ComponentSerializationMethod::Bytemuck;
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fn component_info() -> common_api::bindings::lyra::api::ecs::ComponentInfo {
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common_api::bindings::lyra::api::ecs::ComponentInfo::of::<$type>()
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}
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fn to_bytes(&self) -> Result<Vec<u8>, common_api::ComponentSerializationError> {
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Ok(common_api::bytemuck::bytes_of(self).to_vec())
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}
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fn to_bytes_into(&self, target: &mut Vec<u8>) -> Result<(), common_api::ComponentSerializationError> {
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let bytes = self.to_bytes()?;
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target.extend(bytes.into_iter());
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Ok(())
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}
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fn from_bytes(bytes: &[u8]) -> Result<Self, common_api::ComponentSerializationError> {
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common_api::bytemuck::try_from_bytes::<Self>(&bytes)
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.map_err(|e| common_api::ComponentSerializationError::Bytemuck(e))
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.cloned()
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}
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}
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};
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}
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@ -1,24 +1,23 @@
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/* pub mod bindings {
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wasmtime::component::bindgen!({
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world: "example",
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path: "../witguest/wit/world.wit",
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//tracing: true,
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async: true,
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});
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}
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use bindings::{component::witguest::ecs::EcsWorld, *}; */
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use std::{alloc::Layout, any::TypeId, marker::PhantomData, mem};
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use std::{any::TypeId, marker::PhantomData, mem};
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pub use bytemuck;
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mod component;
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pub use component::*;
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mod bundle;
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pub use bundle::*;
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pub mod bindings {
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wit_bindgen::generate!({
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world: "api",
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path: "wit",
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});
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}
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use lyra::api::ecs::{ComponentInfo, EcsDynamicView, EcsWorld, Entity, WasmTypeId};
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use bindings::*;
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use lyra::api::ecs::{EcsDynamicView, EcsWorld, Entity, WasmTypeId};
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impl WasmTypeId {
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pub fn of<T: 'static>() -> Self {
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@ -28,95 +27,6 @@ impl WasmTypeId {
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}
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}
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impl ComponentInfo {
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pub fn of<C: Component>() -> Self {
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let layout = Layout::new::<C>();
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Self {
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size: layout.size() as _,
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alignment: layout.align() as _,
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type_id: WasmTypeId::of::<C>(),
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}
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}
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}
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#[derive(Debug)]
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pub enum ComponentSerializationMethod {
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/// Serializes the component into bytes using [`bytemuck::bytes_of`].
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Bytemuck,
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/// Serializes the component into bytes using
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/// [bincode](https://github.com/bincode-org/bincode).
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Bincode
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}
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#[derive(Debug, thiserror::Error)]
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pub enum ComponentSerializationError {
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#[error("{0}")]
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Bytemuck(bytemuck::PodCastError),
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}
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pub trait Component: Sized + 'static {
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const SERIALIZATION: ComponentSerializationMethod;
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fn component_info() -> ComponentInfo;
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fn to_bytes(&self) -> Result<Vec<u8>, ComponentSerializationError>;
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fn to_bytes_into(&self, target: &mut Vec<u8>) -> Result<(), ComponentSerializationError>;
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fn from_bytes(bytes: &[u8]) -> Result<Self, ComponentSerializationError>;
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}
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#[macro_export]
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macro_rules! bytemuck_component_impl {
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($type:ident) => {
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impl common_api::Component for $type {
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const SERIALIZATION: common_api::ComponentSerializationMethod = common_api::ComponentSerializationMethod::Bytemuck;
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fn component_info() -> common_api::lyra::api::ecs::ComponentInfo {
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common_api::lyra::api::ecs::ComponentInfo::of::<$type>()
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}
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fn to_bytes(&self) -> Result<Vec<u8>, common_api::ComponentSerializationError> {
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Ok(common_api::bytemuck::bytes_of(self).to_vec())
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}
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fn to_bytes_into(&self, target: &mut Vec<u8>) -> Result<(), common_api::ComponentSerializationError> {
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let bytes = self.to_bytes()?;
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target.extend(bytes.into_iter());
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Ok(())
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}
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fn from_bytes(bytes: &[u8]) -> Result<Self, common_api::ComponentSerializationError> {
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common_api::bytemuck::try_from_bytes::<Self>(&bytes)
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.map_err(|e| common_api::ComponentSerializationError::Bytemuck(e))
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.cloned()
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}
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}
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};
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}
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#[derive(Default)]
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pub struct ComponentBundle {
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bundle: Vec<u8>,
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infos: Vec<ComponentInfo>,
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}
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impl ComponentBundle {
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pub fn new() -> Self {
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Self::default()
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}
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pub fn push<C: Component>(&mut self, c: C) {
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let info = C::component_info();
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self.infos.push(info);
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c.to_bytes_into(&mut self.bundle);
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/* self.bundle.reserve(info.size as _);
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self.bundle.extend(comp_bytes.into_iter()); */
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// dont call the destructor on C to avo
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//mem::forget(c);
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}
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}
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pub struct World {
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inner: EcsWorld,
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}
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@ -128,33 +38,48 @@ impl World {
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}
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}
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pub fn spawn(&self, components: ComponentBundle) -> Entity {
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self.inner.spawn(&components.bundle, &components.infos)
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pub fn spawn<B: Bundle>(&self, bundle: B) -> Result<Entity, ComponentSerializationError> {
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let infos = B::component_info();
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let bundle = bundle.to_bytes()?;
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Ok(self.inner.spawn(&bundle, &infos))
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}
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pub fn view(&self, components: &[ComponentInfo]) -> View {
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View::from(self.inner.view(components))
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pub fn view<B: Bundle>(&self) -> View<B> {
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let infos = B::component_info();
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View::from(self.inner.view(&infos))
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}
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}
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pub struct View {
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pub struct View<B: Bundle> {
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inner: EcsDynamicView,
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_marker: PhantomData<B>,
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}
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impl From<EcsDynamicView> for View {
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impl<B: Bundle> From<EcsDynamicView> for View<B> {
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fn from(value: EcsDynamicView) -> Self {
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Self {
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inner: value
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inner: value,
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_marker: PhantomData
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}
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}
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}
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impl View {
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pub fn next<C: Component>(&mut self) -> Option<C> {
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let row = self.inner.next();
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impl<B: Bundle> View<B> {
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pub fn into_dynamic(self) -> EcsDynamicView {
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self.inner
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}
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if let Some(row) = row {
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Some(C::from_bytes(&row).unwrap())
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pub fn as_dynamic(&self) -> &EcsDynamicView {
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&self.inner
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}
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}
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impl<B: Bundle> Iterator for View<B> {
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type Item = Result<B, ComponentSerializationError>;
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fn next(&mut self) -> Option<Self::Item> {
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if let Some(row) = self.inner.next() {
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Some(B::from_bytes(row))
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} else {
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None
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}
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@ -11,26 +11,49 @@ interface ecs {
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}
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record wasm-type-id {
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// represents a u128, can be converted into that with mem::transmute
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inner: tuple<u64, u64>,
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}
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record component-info {
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/// The size of the component in memory.
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size: u64,
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/// The alignment of the component in memory.
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alignment: u64,
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/// The type id of the component.
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///
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/// This must be unique between component types since its used to identify the components
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/// in spawning and querying.
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type-id: wasm-type-id, // a u128
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}
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resource ecs-dynamic-view {
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constructor(wrld: borrow<ecs-world>, component-infos: list<component-info>);
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/// Get the bytes of the next row in the view.
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///
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/// A row contains multiple component serialized as bytes. The buffer is tighly packed.
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next: func() -> option<list<u8>>;
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}
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resource ecs-world {
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constructor();
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// expects components to be tightly packed in the same order of component-infos
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/// Spawn an entity.
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///
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/// Parameters:
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/// * `components`: A tightly packed byte buffer containing the components to spawn
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/// with the entity. This expects the components in the same order of `component-infos`.
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/// * `component-infos`: A list of `component-infos` uses to identify the components
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/// and specify the layouts of them.
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spawn: func(components: list<u8>, component-infos: list<component-info>) -> entity;
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/// Query for a list of entities and their components.
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///
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/// Parameters:
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/// * `component-infos`: The `component-info`'s of the components that you are querying.
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///
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/// Returns: an iterator that returns the byte buffers of each row.
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view: func(component-infos: list<component-info>) -> ecs-dynamic-view;
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}
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}
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@ -45,7 +45,7 @@ impl From<ecs::Entity> for wasm_ecs::Entity {
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impl Into<ecs::Entity> for wasm_ecs::Entity {
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fn into(self) -> ecs::Entity {
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let mut id = ecs::EntityId(self.id.id);
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let id = ecs::EntityId(self.id.id);
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ecs::Entity::new(id, self.generation)
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}
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}
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@ -2,10 +2,7 @@
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mod bindings;
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use bindings::Guest;
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//use bindings::{component::witguest::ecs::{ComponentInfo, EcsWorld, Entity, WasmTypeId}, Guest};
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use common_api::{bytemuck_component_impl, Component as EcsComponent, ComponentBundle, World};
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use std::{alloc::Layout, any::TypeId, mem};
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use common_api::{bytemuck_component_impl, World};
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#[repr(C)]
|
||||
#[derive(Debug, Clone, Copy, PartialEq, bytemuck::Pod, bytemuck::Zeroable)]
|
||||
|
|
@ -25,22 +22,39 @@ impl Vec3 {
|
|||
|
||||
bytemuck_component_impl!(Vec3);
|
||||
|
||||
#[repr(C)]
|
||||
#[derive(Debug, Clone, Copy, PartialEq, bytemuck::Pod, bytemuck::Zeroable)]
|
||||
struct Vec4 {
|
||||
x: f32,
|
||||
y: f32,
|
||||
z: f32,
|
||||
w: f32,
|
||||
}
|
||||
|
||||
impl Vec4 {
|
||||
pub fn new(x: f32, y: f32, z: f32, w: f32) -> Self {
|
||||
Self {
|
||||
x, y, z, w
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
bytemuck_component_impl!(Vec4);
|
||||
|
||||
struct Component;
|
||||
|
||||
impl Guest for Component {
|
||||
fn on_init() -> Result<(), ()> {
|
||||
let world = World::new();
|
||||
|
||||
let mut bundle = ComponentBundle::new();
|
||||
bundle.push(Vec3::new(7.0, 30.0, 18.0));
|
||||
let en = world.spawn(bundle);
|
||||
let en = world.spawn((Vec3::new(7.0, 30.0, 18.0), Vec4::new(10.0, 332.35, 329.0, 95.0)));
|
||||
|
||||
println!("guest spawned {:?}", en);
|
||||
|
||||
|
||||
let mut view = world.view(&[Vec3::component_info()]);
|
||||
while let Some(c) = view.next::<Vec3>() {
|
||||
println!("Retrieved vec3: {:?}", c);
|
||||
let view = world.view::<(Vec3, Vec4)>();
|
||||
for pos in view {
|
||||
let (p3, p4) = pos.unwrap();
|
||||
println!("Retrieved vec3: {:?}", p3);
|
||||
println!("Retrieved vec4: {:?}", p4);
|
||||
}
|
||||
|
||||
Ok(())
|
||||
|
|
|
|||
Loading…
Reference in New Issue