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_var("DISPATCH_QUEUE_PRIORITY_DEFAULT")
23 .allowlist_function("dispatch_get_global_queue")
24 .allowlist_function("dispatch_async_f")
25 .allowlist_function("dispatch_after_f")
26 .allowlist_function("dispatch_time")
27 .parse_callbacks(Box::new(bindgen::CargoCallbacks))
28 .layout_tests(false)
29 .generate()
30 .expect("unable to generate bindings");
31
32 let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
33 bindings
34 .write_to_file(out_path.join("dispatch_sys.rs"))
35 .expect("couldn't write dispatch bindings");
36}
37
38fn generate_shader_bindings() -> PathBuf {
39 let output_path = PathBuf::from(env::var("OUT_DIR").unwrap()).join("scene.h");
40 let crate_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
41 let mut config = Config::default();
42 config.include_guard = Some("SCENE_H".into());
43 config.language = cbindgen::Language::C;
44 config.export.include.extend([
45 "Bounds".into(),
46 "Corners".into(),
47 "Edges".into(),
48 "Size".into(),
49 "Pixels".into(),
50 "PointF".into(),
51 "Hsla".into(),
52 "ContentMask".into(),
53 "Uniforms".into(),
54 "AtlasTile".into(),
55 "PathRasterizationInputIndex".into(),
56 "PathVertex_ScaledPixels".into(),
57 "ShadowInputIndex".into(),
58 "Shadow".into(),
59 "QuadInputIndex".into(),
60 "Underline".into(),
61 "UnderlineInputIndex".into(),
62 "Quad".into(),
63 "SpriteInputIndex".into(),
64 "MonochromeSprite".into(),
65 "PolychromeSprite".into(),
66 "PathSprite".into(),
67 ]);
68 config.no_includes = true;
69 config.enumeration.prefix_with_name = true;
70 cbindgen::Builder::new()
71 .with_src(crate_dir.join("src/scene.rs"))
72 .with_src(crate_dir.join("src/geometry.rs"))
73 .with_src(crate_dir.join("src/color.rs"))
74 .with_src(crate_dir.join("src/window.rs"))
75 .with_src(crate_dir.join("src/platform.rs"))
76 .with_src(crate_dir.join("src/platform/mac/metal_renderer.rs"))
77 .with_config(config)
78 .generate()
79 .expect("Unable to generate bindings")
80 .write_to_file(&output_path);
81
82 output_path
83}
84
85fn compile_metal_shaders(header_path: &Path) {
86 let shader_path = "./src/platform/mac/shaders.metal";
87 let air_output_path = PathBuf::from(env::var("OUT_DIR").unwrap()).join("shaders.air");
88 let metallib_output_path = PathBuf::from(env::var("OUT_DIR").unwrap()).join("shaders.metallib");
89
90 println!("cargo:rerun-if-changed={}", header_path.display());
91 println!("cargo:rerun-if-changed={}", shader_path);
92
93 let output = Command::new("xcrun")
94 .args([
95 "-sdk",
96 "macosx",
97 "metal",
98 "-gline-tables-only",
99 "-mmacosx-version-min=10.15.7",
100 "-MO",
101 "-c",
102 shader_path,
103 "-include",
104 &header_path.to_str().unwrap(),
105 "-o",
106 ])
107 .arg(&air_output_path)
108 .output()
109 .unwrap();
110
111 if !output.status.success() {
112 eprintln!(
113 "metal shader compilation failed:\n{}",
114 String::from_utf8_lossy(&output.stderr)
115 );
116 process::exit(1);
117 }
118
119 let output = Command::new("xcrun")
120 .args(["-sdk", "macosx", "metallib"])
121 .arg(air_output_path)
122 .arg("-o")
123 .arg(metallib_output_path)
124 .output()
125 .unwrap();
126
127 if !output.status.success() {
128 eprintln!(
129 "metallib compilation failed:\n{}",
130 String::from_utf8_lossy(&output.stderr)
131 );
132 process::exit(1);
133 }
134}