35 lines
1.3 KiB
Rust
35 lines
1.3 KiB
Rust
use crate::modules::{get_modules, get_path};
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use proc_macro::TokenStream;
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use quote::quote;
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use syn::{parse_macro_input, DeriveInput, Path};
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pub fn derive_render_resource(input: TokenStream) -> TokenStream {
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let ast = parse_macro_input!(input as DeriveInput);
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let modules = get_modules(&ast.attrs);
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let bevy_render_path: Path = get_path(&modules.bevy_render);
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let bevy_asset_path: Path = get_path(&modules.bevy_asset);
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let bevy_core_path: Path = get_path(&modules.bevy_core);
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let struct_name = &ast.ident;
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TokenStream::from(quote! {
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impl #bevy_render_path::renderer::RenderResource for #struct_name {
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fn resource_type(&self) -> Option<#bevy_render_path::renderer::RenderResourceType> {
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Some(#bevy_render_path::renderer::RenderResourceType::Buffer)
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}
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fn write_buffer_bytes(&self, buffer: &mut [u8]) {
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use #bevy_core_path::Bytes;
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self.write_bytes(buffer);
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}
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fn buffer_byte_len(&self) -> Option<usize> {
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use #bevy_core_path::Bytes;
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Some(self.byte_len())
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}
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fn texture(&self) -> Option<&#bevy_asset_path::Handle<#bevy_render_path::texture::Texture>> {
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None
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}
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}
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})
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}
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