feat: meson build

Author: superstructor

deno.json

@@ -0,0 +1,13 @@
+{
+  "name": "@discere-os/pango.wasm",
+  "exports": {
+    ".": "./",
+    "./side": "./install/wasm/pango-side.wasm",
+    "./main": "./install/wasm/pango-main.js"
+  },
+  "tasks": {
+    "build:main:meson": "meson setup build-main --cross-file=scripts/emscripten.cross -Dbuildtype=release --prefix=$PWD/install -Dlibdir=wasm -Dbindir=wasm && meson compile -C build-main pango-main && meson install -C build-main",
+    "build:side:meson": "meson setup build-side --cross-file=scripts/emscripten.cross -Dbuildtype=release --prefix=$PWD/install -Dlibdir=wasm -Dbindir=wasm -Dc_args='-msimd128' -Dc_link_args='-sSIDE_MODULE=2 -fPIC -O3 -flto' && meson compile -C build-side pango-side && meson install -C build-side && python3 scripts/postinstall.py $PWD/install",
+    "build:wasm:meson": "deno task build:main:meson && deno task build:side:meson"
+  }
+}

meson.build

@@ -562,6 +562,7 @@ root_inc = include_directories('.')
 pango_inc = include_directories('pango')
 
 subdir('pango')
+subdir('wasm')
 subdir('utils')
 subdir('tools')
 subdir('docs')

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, 'pango-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/meson.build

@@ -0,0 +1,44 @@
+pango_wasm_cargs = ['-msimd128', '-DPANGO_WASM=1']
+
+pango_main_link_args = [
+  '-sWASM=1',
+  '-sMODULARIZE=1',
+  '-sEXPORT_ES6=1',
+  '-sEXPORT_NAME=PangoModule',
+  '-sALLOW_MEMORY_GROWTH=1',
+  '-sENVIRONMENT=web,webview,worker',
+  '-sNO_FILESYSTEM=1',
+  '-sEXPORTED_RUNTIME_METHODS=["cwrap","ccall","UTF8ToString"]',
+  '-O3',
+  '-flto',
+]
+
+executable(
+  'pango-main',
+  files('pango_wasm_module.c'),
+  dependencies: [libpango_dep],
+  c_args: pango_wasm_cargs,
+  link_args: pango_main_link_args,
+  install: true,
+  install_dir: get_option('bindir'),
+)
+
+pango_side_link_args = [
+  '-sSIDE_MODULE=2',
+  '-fPIC',
+  '-O3',
+  '-flto',
+  '-sEXPORTED_FUNCTIONS=["_pango_wasm_version"]',
+]
+
+shared_module(
+  'pango-side',
+  files('pango_wasm_side.c'),
+  dependencies: [libpango_dep],
+  name_prefix: '',
+  c_args: pango_wasm_cargs,
+  link_args: pango_side_link_args,
+  install: true,
+  install_dir: get_option('libdir'),
+)
+

wasm/pango_wasm_module.c

@@ -0,0 +1,8 @@
+#include <emscripten.h>
+#include <pango/pango.h>
+
+EMSCRIPTEN_KEEPALIVE
+const char* pango_wasm_version(void) {
+  return pango_version_string();
+}
+

wasm/pango_wasm_side.c

@@ -0,0 +1,6 @@
+#include <pango/pango.h>
+
+const char* pango_wasm_version(void) {
+  return pango_version_string();
+}
+