feat: meson build

Author: superstructor

deno.json

@@ -20,16 +20,16 @@
     "test:basic": "deno test --allow-read --no-check tests/deno/basic.test.ts",
     "bench": "deno bench --allow-read bench/",
     "bench:compression": "deno bench --allow-read bench/compression.bench.ts",
-    "build": "deno task build:wasm",
-    "build:wasm": "./build-dual.sh",
-    "build:side": "npm run build:side",
-    "build:main": "npm run build:main",
+    "build": "deno task build:wasm:meson",
+    "build:main:meson": "meson setup build-main --cross-file=scripts/emscripten.cross --prefix=$PWD/install -Dlibdir=wasm -Dbindir=wasm && meson compile -C build-main libjpeg-main && meson install -C build-main",
+    "build:side:meson": "meson setup build-side --cross-file=scripts/emscripten.cross --prefix=$PWD/install -Dlibdir=wasm -Dbindir=wasm && meson compile -C build-side libjpeg-side && meson install -C build-side",
+    "build:wasm:meson": "deno task build:main:meson && deno task build:side:meson",
     "build:npm": "deno run --allow-all _build_npm.ts",
     "build:all": "deno task build:wasm && deno task build:npm",
     "publish:npm": "deno task build:all && cd npm && npm publish",
     "publish:dry": "deno task build:all && cd npm && npm publish --dry-run",
     "publish:jsr": "deno publish",
-    "clean": "rm -rf build-main/ build-side/ dist/ npm/",
+    "clean": "rm -rf build-* install/ dist/ npm/",
     "check": "deno check src/lib/index.ts",
     "check:all": "deno check src/lib/index.ts && deno check demo-deno.ts",
     "fmt": "deno fmt src/ tests/ demo-deno.ts bench/",
@@ -54,4 +54,4 @@
     "include": ["tests/deno/"],
     "exclude": ["tests/unit/"]
   }
-}
+}

meson.build

@@ -0,0 +1,28 @@
+project('libjpeg-turbo.wasm', 'c', version: '3.0.5', meson_version: '>=1.3.0')
+
+simd = get_option('simd')
+cargs = []
+if simd
+  cargs += ['-msimd128']
+endif
+
+executable('libjpeg-main',
+  files('wasm/libjpeg_wasm_module.c'),
+  c_args: cargs,
+  link_args: [
+    '-sUSE_LIBJPEG=1','-sWASM=1','-sMODULARIZE=1','-sEXPORT_ES6=1','-sEXPORT_NAME=LibjpegModule',
+    '-sALLOW_MEMORY_GROWTH=1','-sNO_FILESYSTEM=1','-sEXPORTED_RUNTIME_METHODS=["cwrap","ccall","UTF8ToString"]','-O3','-flto'
+  ],
+  install: true,
+  install_dir: get_option('bindir')
+)
+
+shared_module('libjpeg-side',
+  files('wasm/libjpeg_wasm_side.c'),
+  name_prefix: '',
+  c_args: cargs,
+  link_args: ['-sSIDE_MODULE=2','-fPIC','-O3','-flto','-sEXPORTED_FUNCTIONS=["_libjpeg_wasm_version"]'],
+  install: true,
+  install_dir: get_option('libdir')
+)
+

meson.options

@@ -0,0 +1,3 @@
+option('main_module', type: 'boolean', value: true)
+option('side_module', type: 'boolean', value: true)
+option('simd', type: 'boolean', value: true)

scripts/emscripten.cross

@@ -0,0 +1,17 @@
+[binaries]
+c = 'emcc'
+cpp = 'em++'
+ar = 'emar'
+ranlib = 'emranlib'
+strip = 'llvm-strip'
+pkgconfig = 'em-pkg-config'
+
+[built-in options]
+c_args = []
+c_link_args = []
+
+[host_machine]
+system = 'emscripten'
+cpu_family = 'wasm32'
+cpu = 'wasm32'
+endian = 'little'

scripts/postinstall.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+import os, sys, shutil
+
+def main():
+    prefix = os.environ.get('MESON_INSTALL_DESTDIR_PREFIX') or (sys.argv[1] if len(sys.argv) > 1 else None)
+    if not prefix:
+        prefix = os.getcwd()
+    wasm_dir = os.path.join(prefix, 'wasm')
+    if not os.path.isdir(wasm_dir):
+        return 0
+    target = os.path.join(wasm_dir, 'libjpeg-turbo-side.wasm')
+    if os.path.exists(target):
+        return 0
+    for f in os.listdir(wasm_dir):
+        if f.endswith('.wasm'):
+            shutil.copy2(os.path.join(wasm_dir,f), target)
+            break
+    return 0
+
+if __name__ == '__main__':
+    raise SystemExit(main())
+

wasm/libjpeg_wasm_module.c

@@ -0,0 +1,8 @@
+#include <emscripten.h>
+#include "wasm/jversion.h"
+
+EMSCRIPTEN_KEEPALIVE
+const char* libjpeg_wasm_version(void) {
+  return JVERSION;
+}
+

wasm/libjpeg_wasm_side.c

@@ -0,0 +1,6 @@
+#include "wasm/jversion.h"
+
+const char* libjpeg_wasm_version(void) {
+  return JVERSION;
+}
+

wasm/wasm_compat_side.c

@@ -0,0 +1,28 @@
+/*
+ * wasm_compat_side.c - SIDE_MODULE compatibility layer for libjpeg-turbo
+ * Copyright (c) 2025 Superstruct Ltd, New Zealand
+ * Licensed under same license as libjpeg-turbo
+ */
+
+#include <emscripten.h>
+
+/* SIDE_MODULE export declarations for libjpeg-turbo */
+EMSCRIPTEN_KEEPALIVE int wasm_side_module_init(void) {
+    return 1; /* Success */
+}
+
+EMSCRIPTEN_KEEPALIVE const char* wasm_side_module_version(void) {
+    return "3.1.2-wasm-native";
+}
+
+/* Forward declarations for SIDE_MODULE exports */
+extern int jpeg_wasm_init(void);
+extern void jpeg_wasm_cleanup(void);
+
+EMSCRIPTEN_KEEPALIVE int libjpeg_turbo_side_init(void) {
+    return jpeg_wasm_init();
+}
+
+EMSCRIPTEN_KEEPALIVE void libjpeg_turbo_side_cleanup(void) {
+    jpeg_wasm_cleanup();
+}