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build.rs
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use std::env;
use std::process::{Command, Stdio};
use std::fs::File;
use std::io::{self, BufRead};
use std::path::{Path,PathBuf};
macro_rules! logMe {
($($tokens: tt)*) => {
println!("cargo:warning={}", format!($($tokens)*))
}
}
fn main() {
println!("cargo:rerun-if-changed=Clipper2");
if cfg!(feature = "update-bindings") {
println!("cargo:rerun-if-changed=generated");
}
let extra_dir = if is_alpine_linux() {
Some(alpine_includes())
} else {
None
};
let mut builder = cc::Build::new();
let mut build = builder.cpp(true)
.opt_level(3)
.include("clipper2c/vendor/Clipper2/CPP/Clipper2Lib/include/")
// .include("clipper2c/vendor/Clipper2/CPP/Utils/")
;
if let Some(dirs) = extra_dir {
build = build.includes(dirs);
}
build
.include("clipper2c/include")
.include("clipper2c/src")
.files([
"clipper2c/vendor/Clipper2/CPP/Clipper2Lib/src/clipper.engine.cpp",
"clipper2c/vendor/Clipper2/CPP/Clipper2Lib/src/clipper.offset.cpp",
"clipper2c/vendor/Clipper2/CPP/Clipper2Lib/src/clipper.rectclip.cpp",
"clipper2c/src/clipper2c.cpp",
"clipper2c/src/clipper64.cpp",
"clipper2c/src/clipperd.cpp",
"clipper2c/src/clipperoffset.cpp",
"clipper2c/src/conv.cpp",
"clipper2c/src/polytree.cpp",
"clipper2c/src/rect.cpp",
// "clipper2c/vendor/Clipper2/CPP/Utils/clipper.svg.cpp",
// "clipper2c/src/svg.cpp",
])
.flag_if_supported("-std:c++17") // MSVC
.flag_if_supported("-std=c++17")
.compile("Clipper2");
let target_os = env::var("CARGO_CFG_TARGET_OS").unwrap();
let target_env = env::var("CARGO_CFG_TARGET_ENV").unwrap();
match (target_os.as_str(), target_env.as_str()) {
("linux", _) | ("windows", "gnu") | ("android", _) => {
println!("cargo:rustc-link-lib=dylib=stdc++")
}
("macos", _) | ("ios", _) => println!("cargo:rustc-link-lib=dylib=c++"),
("windows", "msvc") => {}
_ => unimplemented!(
"target_os: {}, target_env: {}",
target_os.as_str(),
target_env.as_str()
),
}
#[cfg(feature = "generate-bindings")]
{
let bindings = bindgen::Builder::default()
.header("clipper2c/include/clipper2c.h")
.header("clipper2c/include/types.h")
.allowlist_type("ClipperClipperD")
.allowlist_type("ClipperPathD")
.allowlist_type("ClipperPathsD")
.allowlist_type("ClipperPolyTreeD")
.allowlist_type("ClipperPointD")
.allowlist_type("ClipperFillRule")
.allowlist_type("ClipperClipType")
// PathD Methods
.allowlist_function("clipper_pathd_size")
.allowlist_function("clipper_pathd")
.allowlist_function("clipper_pathd_of_points")
.allowlist_function("clipper_pathd_add_point")
.allowlist_function("clipper_pathd_length")
.allowlist_function("clipper_pathd_get_point")
.allowlist_function("clipper_delete_pathd")
.allowlist_function("clipper_pathd_simplify")
.allowlist_function("clipper_pathd_to_path64")
.allowlist_function("clipper_point_in_pathd")
// PathsD Methods
.allowlist_function("clipper_pathsd_size")
.allowlist_function("clipper_pathsd")
.allowlist_function("clipper_pathsd_of_paths")
.allowlist_function("clipper_pathsd_add_path")
.allowlist_function("clipper_pathsd_add_paths")
.allowlist_function("clipper_pathsd_get_path")
.allowlist_function("clipper_pathsd_get_point")
.allowlist_function("clipper_pathsd_length")
.allowlist_function("clipper_pathsd_path_length")
.allowlist_function("clipper_delete_pathsd")
.allowlist_function("clipper_pathsd_simplify")
.allowlist_function("clipper_pathsd_inflate")
.allowlist_function("clipper_pathsd_to_paths64")
// ClipperD Methods
.allowlist_function("clipper_clipperd_size")
.allowlist_function("clipper_clipperd")
.allowlist_function("clipper_clipperd_add_subject")
.allowlist_function("clipper_clipperd_add_open_subject")
.allowlist_function("clipper_clipperd_add_clip")
.allowlist_function("clipper_clipperd_execute")
.allowlist_function("clipper_clipperd_execute_tree_with_open")
.allowlist_function("clipper_clipperd_set_preserve_collinear")
.allowlist_function("clipper_clipperd_get_preserve_collinear")
.allowlist_function("clipper_clipperd_set_reverse_solution")
.allowlist_function("clipper_clipperd_get_reverse_solution")
.allowlist_function("clipper_clipperd_clear")
.allowlist_function("clipper_delete_clipperd")
// PolyTreeD Methods
.allowlist_function("clipper_polytreed_size")
.allowlist_function("clipper_polytreed")
.allowlist_function("clipper_polytreed_parent")
.allowlist_function("clipper_polytreed_count")
.allowlist_function("clipper_polytreed_get_child")
.allowlist_function("clipper_polytreed_set_inv_scale")
.allowlist_function("clipper_polytreed_inv_scale")
.allowlist_function("clipper_polytreed_add_child")
.allowlist_function("clipper_polytreed_is_hole")
.allowlist_function("clipper_polytreed_polygon")
.allowlist_function("clipper_polytreed_area")
.allowlist_function("clipper_polytreed_to_paths")
.allowlist_function("clipper_delete_polytreed")
// Path64 Methods
.allowlist_function("clipper_path64_size")
.allowlist_function("clipper_path64")
.allowlist_function("clipper_path64_of_points")
.allowlist_function("clipper_path64_add_point")
.allowlist_function("clipper_path64_length")
.allowlist_function("clipper_path64_get_point")
.allowlist_function("clipper_delete_path64")
.allowlist_function("clipper_path64_simplify")
.allowlist_function("clipper_path64_to_pathd")
.allowlist_function("clipper_point_in_path64")
// Paths64 Methods
.allowlist_function("clipper_paths64_size")
.allowlist_function("clipper_paths64")
.allowlist_function("clipper_paths64_of_paths")
.allowlist_function("clipper_paths64_add_path")
.allowlist_function("clipper_paths64_add_paths")
.allowlist_function("clipper_paths64_get_path")
.allowlist_function("clipper_paths64_get_point")
.allowlist_function("clipper_paths64_length")
.allowlist_function("clipper_paths64_path_length")
.allowlist_function("clipper_delete_paths64")
.allowlist_function("clipper_paths64_simplify")
.allowlist_function("clipper_paths64_inflate")
.allowlist_function("clipper_paths64_to_pathsd")
// ClipperD Methods
.allowlist_function("clipper_clipper64_size")
.allowlist_function("clipper_clipper64")
.allowlist_function("clipper_clipper64_add_subject")
.allowlist_function("clipper_clipper64_add_open_subject")
.allowlist_function("clipper_clipper64_add_clip")
.allowlist_function("clipper_clipper64_execute")
.allowlist_function("clipper_clipper64_execute_tree_with_open")
.allowlist_function("clipper_clipper64_set_preserve_collinear")
.allowlist_function("clipper_clipper64_get_preserve_collinear")
.allowlist_function("clipper_clipper64_set_reverse_solution")
.allowlist_function("clipper_clipper64_get_reverse_solution")
.allowlist_function("clipper_clipper64_clear")
.allowlist_function("clipper_delete_clipper64")
// PolyTreeD Methods
.allowlist_function("clipper_polytree64_size")
.allowlist_function("clipper_polytree64")
.allowlist_function("clipper_polytree64_parent")
.allowlist_function("clipper_polytree64_count")
.allowlist_function("clipper_polytree64_get_child")
.allowlist_function("clipper_polytree64_set_inv_scale")
.allowlist_function("clipper_polytree64_inv_scale")
.allowlist_function("clipper_polytree64_add_child")
.allowlist_function("clipper_polytree64_is_hole")
.allowlist_function("clipper_polytree64_polygon")
.allowlist_function("clipper_polytree64_area")
.allowlist_function("clipper_polytree64_to_paths")
.allowlist_function("clipper_delete_polytree64")
// ClipperOffset Methods
.allowlist_function("clipper_clipperoffset_size")
.allowlist_function("clipper_clipperoffset")
.allowlist_function("clipper_clipperoffset_set_miter_limit")
.allowlist_function("clipper_clipperoffset_set_arc_tolerance")
.allowlist_function("clipper_clipperoffset_set_preserve_collinear")
.allowlist_function("clipper_clipperoffset_set_reverse_solution")
.allowlist_function("clipper_clipperoffset_get_miter_limit")
.allowlist_function("clipper_clipperoffset_get_arc_tolerance")
.allowlist_function("clipper_clipperoffset_get_preserve_collinear")
.allowlist_function("clipper_clipperoffset_get_reverse_solution")
.allowlist_function("clipper_clipperoffset_error_code")
.allowlist_function("clipper_clipperoffset_clear")
.allowlist_function("clipper_clipperoffset_add_path64")
.allowlist_function("clipper_clipperoffset_add_paths64")
.allowlist_function("clipper_clipperoffset_execute")
.allowlist_function("clipper_delete_clipperoffset")
// Path64 Minkowski
.allowlist_function("clipper_path64_minkowski_sum")
.allowlist_function("clipper_path64_minkowski_diff")
// Paths64 Minkowski
.allowlist_function("clipper_paths64_minkowski_sum")
.allowlist_function("clipper_paths64_minkowski_diff")
// Pathd Minkowski
.allowlist_function("clipper_pathd_minkowski_sum")
.allowlist_function("clipper_pathd_minkowski_diff")
// Pathsd Minkowski
.allowlist_function("clipper_pathsd_minkowski_sum")
.allowlist_function("clipper_pathsd_minkowski_diff")
// Area
.allowlist_function("clipper_pathd_area")
.allowlist_function("clipper_path64_area")
.allowlist_function("clipper_pathsd_area")
.allowlist_function("clipper_paths64_area")
.size_t_is_usize(true)
.generate()
.expect("unable to generate bindings");
let out_path = if cfg!(feature = "update-bindings") {
std::path::PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()).join("generated")
} else {
std::path::PathBuf::from(env::var("OUT_DIR").unwrap())
};
bindings
.write_to_file(out_path.join("bindings.rs"))
.expect("couldn't write bindings!");
}
}
fn get_stdlib_version() -> Option<String> {
let mut cmd = Command::new("g++");
cmd.arg("-dumpversion");
let output = cmd.stderr(Stdio::inherit()).output().ok()?;
if output.status.code() != Some(0) {
return None;
}
match String::from_utf8(output.stdout).unwrap().trim() {
"" => None,
v => Some(String::from(v)),
}
}
fn is_alpine_linux() -> bool {
let path = Path::new("/etc/os-release");
if let Ok(file) = File::open(path) {
for line in io::BufReader::new(file).lines() {
if let Ok(content) = line {
if content.trim() == "ID=alpine" {
return true;
}
}
}
}
false
}
fn alpine_includes() -> Vec<PathBuf> {
let arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
match get_stdlib_version() {
None => {
logMe!("alpine: unable to determine g++ stdlib version");
vec![]
}
Some(cpp) => vec![
PathBuf::from(format!("/usr/include/c++/{cpp}")),
PathBuf::from(format!("/usr/include/c++/{cpp}/{arch}-alpine-linux-musl")),
],
}
}