Evan Almloff
f9617c8d33
* Create a crate for constant serialization of config structs for manganis * use SerializeConst for the image asset builder * switch to a declarative macro for assets * add serializable options for each asset type * implement the new manganis macro * optimize assets in the CLI * Fix assets with dioxus formattable * reduce fuzzing test limits * use the new syntax in examples * fix avif support * Fix manganis doc tests * cache asset optimization * Split out asset and bundled asset * make hash pointer width independent * Fix manganis macro docs * add constvec::is_empty method to fix clippy lint * remove nasm feature * simplify test_rsplit_once test so typos passes * revert example change from clippy fix * always accept unix paths * fix windows path seperator * fix folder asset hash * Optimize assets in a blocking task * Fix asset options docs * Document Asset and BundledAsset * simplify the linker macro a bit * add more docs to AssetParser expansion * add image format helpers * Split by both unix and windows path separators and take the smallest one
34 lines
1.5 KiB
Rust
34 lines
1.5 KiB
Rust
use proc_macro2::TokenStream as TokenStream2;
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use quote::ToTokens;
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/// We store description of the assets an application uses in the executable.
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/// We use the `link_section` attribute embed an extra section in the executable.
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/// We force rust to store a serialized representation of the asset description
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/// inside a particular region of the binary, with the label "manganis".
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/// After linking, the "manganis" sections of the different object files will be merged.
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pub fn generate_link_section(asset: impl ToTokens) -> TokenStream2 {
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let position = proc_macro2::Span::call_site();
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let section_name = syn::LitStr::new(
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manganis_core::linker::LinkSection::CURRENT.link_section,
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position,
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);
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quote::quote! {
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// First serialize the asset into a constant sized buffer
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const __BUFFER: manganis::macro_helpers::const_serialize::ConstVec<u8> = manganis::macro_helpers::serialize_asset(&#asset);
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// Then pull out the byte slice
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const __BYTES: &[u8] = __BUFFER.as_ref();
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// And the length of the byte slice
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const __LEN: usize = __BYTES.len();
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// Now that we have the size of the asset, copy the bytes into a static array
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#[link_section = #section_name]
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#[used]
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static __LINK_SECTION: [u8; __LEN] = manganis::macro_helpers::copy_bytes(__BYTES);
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fn __keep_link_section() -> u8 {
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unsafe { std::ptr::read_volatile(__LINK_SECTION.as_ptr()) }
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}
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}
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}
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