1use std::{
2 env,
3 path::{Path, PathBuf},
4 process::{self, Command},
5};
6
7use cbindgen::Config;
8
9fn main() {
10 generate_dispatch_bindings();
11 let header_path = generate_shader_bindings();
12 compile_metal_shaders(&header_path);
13}
14
15fn generate_dispatch_bindings() {
16 println!("cargo:rustc-link-lib=framework=System");
17 println!("cargo:rerun-if-changed=src/platform/mac/dispatch.h");
18
19 let bindings = bindgen::Builder::default()
20 .header("src/platform/mac/dispatch.h")
21 .allowlist_var("_dispatch_main_q")
22 .allowlist_function("dispatch_async_f")
23 .parse_callbacks(Box::new(bindgen::CargoCallbacks))
24 .layout_tests(false)
25 .generate()
26 .expect("unable to generate bindings");
27
28 let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
29 bindings
30 .write_to_file(out_path.join("dispatch_sys.rs"))
31 .expect("couldn't write dispatch bindings");
32}
33
34fn generate_shader_bindings() -> PathBuf {
35 let output_path = PathBuf::from(env::var("OUT_DIR").unwrap()).join("scene.h");
36 let crate_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
37 let mut config = Config::default();
38 config.include_guard = Some("SCENE_H".into());
39 config.language = cbindgen::Language::C;
40 config.export.include.extend([
41 "Bounds".into(),
42 "Corners".into(),
43 "Edges".into(),
44 "Size".into(),
45 "Pixels".into(),
46 "PointF".into(),
47 "Hsla".into(),
48 "ScaledContentMask".into(),
49 "Uniforms".into(),
50 "AtlasTile".into(),
51 "QuadInputIndex".into(),
52 "Quad".into(),
53 "SpriteInputIndex".into(),
54 "MonochromeSprite".into(),
55 "PolychromeSprite".into(),
56 ]);
57 config.no_includes = true;
58 config.enumeration.prefix_with_name = true;
59 cbindgen::Builder::new()
60 .with_src(crate_dir.join("src/scene.rs"))
61 .with_src(crate_dir.join("src/geometry.rs"))
62 .with_src(crate_dir.join("src/color.rs"))
63 .with_src(crate_dir.join("src/window.rs"))
64 .with_src(crate_dir.join("src/platform.rs"))
65 .with_src(crate_dir.join("src/platform/mac/metal_renderer.rs"))
66 .with_config(config)
67 .generate()
68 .expect("Unable to generate bindings")
69 .write_to_file(&output_path);
70
71 output_path
72}
73
74fn compile_metal_shaders(header_path: &Path) {
75 let shader_path = "./src/platform/mac/shaders.metal";
76 let air_output_path = PathBuf::from(env::var("OUT_DIR").unwrap()).join("shaders.air");
77 let metallib_output_path = PathBuf::from(env::var("OUT_DIR").unwrap()).join("shaders.metallib");
78
79 println!("cargo:rerun-if-changed={}", header_path.display());
80 println!("cargo:rerun-if-changed={}", shader_path);
81
82 let output = Command::new("xcrun")
83 .args([
84 "-sdk",
85 "macosx",
86 "metal",
87 "-gline-tables-only",
88 "-mmacosx-version-min=10.15.7",
89 "-MO",
90 "-c",
91 shader_path,
92 "-include",
93 &header_path.to_str().unwrap(),
94 "-o",
95 ])
96 .arg(&air_output_path)
97 .output()
98 .unwrap();
99
100 if !output.status.success() {
101 eprintln!(
102 "metal shader compilation failed:\n{}",
103 String::from_utf8_lossy(&output.stderr)
104 );
105 process::exit(1);
106 }
107
108 let output = Command::new("xcrun")
109 .args(["-sdk", "macosx", "metallib"])
110 .arg(air_output_path)
111 .arg("-o")
112 .arg(metallib_output_path)
113 .output()
114 .unwrap();
115
116 if !output.status.success() {
117 eprintln!(
118 "metallib compilation failed:\n{}",
119 String::from_utf8_lossy(&output.stderr)
120 );
121 process::exit(1);
122 }
123}