Wasm-shaper info

Cargo.toml

@@ -41,6 +41,11 @@ glyph-names = []
 # enable this feature.
 gvar-alloc = ["std"]
 
+# Enables experimental features, such as the WASM Shaper experimental feature, 
+# ported from HarfBuzz. https://github.com/harfbuzz/harfbuzz/blob/main/docs/wasm-shaper.md
+experimental = ["wasm-shaper"]
+wasm-shaper = []
+
 [dev-dependencies]
 base64 = "0.22.1"
 pico-args = "0.5"

src/lib.rs

@@ -71,6 +71,8 @@ pub use fvar::VariationAxis;
 pub use language::Language;
 pub use name::{name_id, PlatformId};
 pub use os2::{Permissions, ScriptMetrics, Style, UnicodeRanges, Weight, Width};
+#[cfg(feature = "wasm-shaper")]
+pub use tables::wasm;
 pub use tables::CFFError;
 #[cfg(feature = "apple-layout")]
 pub use tables::{ankr, feat, kerx, morx, trak};
@@ -971,6 +973,8 @@ pub struct RawFaceTables<'a> {
     pub mvar: Option<&'a [u8]>,
     #[cfg(feature = "variable-fonts")]
     pub vvar: Option<&'a [u8]>,
+    #[cfg(feature = "wasm-shaper")]
+    pub wasm: Option<&'a [u8]>,
 }
 
 /// Parsed face tables.
@@ -1041,6 +1045,8 @@ pub struct FaceTables<'a> {
     pub mvar: Option<mvar::Table<'a>>,
     #[cfg(feature = "variable-fonts")]
     pub vvar: Option<vvar::Table<'a>>,
+    #[cfg(feature = "wasm-shaper")]
+    pub wasm: Option<wasm::Table<'a>>,
 }
 
 /// A font face.
@@ -1187,6 +1193,8 @@ impl<'a> Face<'a> {
                 b"trak" => tables.trak = table_data,
                 b"vhea" => tables.vhea = table_data,
                 b"vmtx" => tables.vmtx = table_data,
+                #[cfg(feature = "wasm-shaper")]
+                b"Wasm" => tables.wasm = table_data,
                 _ => {}
             }
         }
@@ -1348,6 +1356,8 @@ impl<'a> Face<'a> {
             mvar: raw_tables.mvar.and_then(mvar::Table::parse),
             #[cfg(feature = "variable-fonts")]
             vvar: raw_tables.vvar.and_then(vvar::Table::parse),
+            #[cfg(feature = "wasm-shaper")]
+            wasm: raw_tables.wasm.and_then(wasm::Table::parse), 
         })
     }
 

src/tables/mod.rs

@@ -52,6 +52,9 @@ pub mod mvar;
 #[cfg(feature = "variable-fonts")]
 pub mod vvar;
 
+#[cfg(feature = "wasm-shaper")]
+pub mod wasm;
+
 pub use cff::cff1;
 #[cfg(feature = "variable-fonts")]
 pub use cff::cff2;

src/tables/wasm.rs

@@ -0,0 +1,19 @@
+//! A [WASM table](https://github.com/harfbuzz/harfbuzz/blob/main/docs/wasm-shaper.md) experimental implementation
+
+#![allow(unused)] // for the time being
+
+use crate::parser::{Offset as _, Offset32, Stream};
+
+/// A WASM module. Contains the WASM Raw Data
+#[derive(Clone, Copy, Debug)]
+pub struct Table<'a> {
+    /// Raw WASM data in WASM format.
+    pub wasm_data: &'a [u8],
+}
+
+impl<'a> Table<'a> {
+    /// Parses a table from raw data.
+    pub fn parse(data: &'a [u8]) -> Option<Self> {
+        Some(Table { wasm_data: data })
+    }
+}