ddidderr
ff1169abed
Ghostty can be built with -Dfont-backend=freetype, which uses FreeType without any font discovery. The Rust port only had fontconfig+freetype (default on Linux) and the CoreText variants. The new cargo feature `font-backend-freetype` on ghostty-font (forwarded by ghostty-cli and the root crate; non-Apple, non-wasm targets) behaves like Zig's mode: font-family discovery, fallback search and codepoint-map overrides are skipped (embedded fonts only); +list-fonts and +show-face print Zig's "built without a font discovery mechanism" message and exit 1; +version reports `.freetype`. The default backend is unchanged. Also registers the Rust-only benchmark tooling extensions (--time, --handler=full, ghostty-synthetic +sgr) in DEVIANT_FIXES.md. Note: `--all-features` now selects this backend for the workspace. Test Plan: - cargo test -p ghostty-font --features font-backend-freetype (198) - cargo build --features font-backend-freetype && ghostty +list-fonts
78 lines
3.0 KiB
Rust
78 lines
3.0 KiB
Rust
//! Emits the font backend `cfg`s (port of `font/backend.zig`'s `Backend`
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//! helpers `hasFreetype`/`hasCoretext`/`hasFontconfig`/`hasHarfbuzz`).
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//!
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//! Backends (see `src/backend.rs`):
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//! * Linux & other non-Apple, non-wasm targets: `fontconfig_freetype`.
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//! * Linux & other non-Apple, non-wasm targets with the cargo feature
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//! `font-backend-freetype`: `freetype` (FreeType rendering, HarfBuzz
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//! shaping, no font discovery; Zig `-Dfont-backend=freetype`).
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//! * wasm32: `web_canvas`.
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//! * Apple targets: `coretext` (default), or via cargo features
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//! `coretext-freetype`, `coretext-harfbuzz`, `coretext-noshape`.
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//!
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//! Emitted cfgs:
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//! * `font_freetype` - FreeType face / library are compiled.
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//! * `font_fontconfig` - fontconfig discovery is compiled.
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//! * `font_discovery` - a discovery mechanism (fontconfig or CoreText) exists
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//! (Zig: `font.Discover != void`).
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//! * `font_harfbuzz` - the HarfBuzz shaper is compiled.
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//! * `font_coretext` - CoreText discovery/deferred face (Apple targets).
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//! * `font_coretext_face` - the CoreText `Face` is the font face.
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//! * `font_coretext_shaper` - the CoreText shaper is the shaper.
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//! * `font_noshape` - the no-op shaper is the shaper.
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fn main() {
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println!("cargo:rerun-if-changed=build.rs");
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for c in [
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"font_freetype",
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"font_fontconfig",
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"font_discovery",
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"font_harfbuzz",
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"font_coretext",
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"font_coretext_face",
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"font_coretext_shaper",
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"font_noshape",
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] {
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println!("cargo:rustc-check-cfg=cfg({c})");
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}
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let arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap_or_default();
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let vendor = std::env::var("CARGO_CFG_TARGET_VENDOR").unwrap_or_default();
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let feat = |n: &str| std::env::var_os(format!("CARGO_FEATURE_{n}")).is_some();
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let wasm = arch == "wasm32";
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let apple = vendor == "apple";
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let ct_ft = feat("CORETEXT_FREETYPE");
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let ct_hb = feat("CORETEXT_HARFBUZZ");
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let ct_noshape = feat("CORETEXT_NOSHAPE");
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let ft_only = feat("FONT_BACKEND_FREETYPE");
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if ft_only && (wasm || apple) {
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println!(
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"cargo:warning=feature `font-backend-freetype` only applies to non-Apple, \
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non-wasm targets; ignored"
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);
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}
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let ft_only = ft_only && !wasm && !apple;
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let on = |c: &str, v: bool| {
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if v {
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println!("cargo:rustc-cfg={c}");
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}
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};
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let freetype = !wasm && (!apple || ct_ft);
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let harfbuzz = !wasm && (!apple || ct_ft || ct_hb);
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on("font_freetype", freetype);
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let fontconfig = !wasm && !apple && !ft_only;
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on("font_fontconfig", fontconfig);
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on("font_discovery", fontconfig || apple);
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on("font_harfbuzz", harfbuzz);
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on("font_coretext", apple);
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on("font_coretext_face", apple && !ct_ft);
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// The shaper is CoreText only for the plain `coretext` backend;
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// `coretext_noshape` uses the no-op shaper.
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on("font_coretext_shaper", apple && !harfbuzz && !ct_noshape);
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on("font_noshape", apple && !harfbuzz && ct_noshape);
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}
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