Better wasm support again (#1779)

* wasm: add shell file for loading wasm module

* wasm: disable pcre2 jit

* wasm: add more configuration options

* cross/wasm: more build options

(cherry picked from commit 6575c297b50417eff0b82fd80340a192ba016b99)
This commit is contained in:
Takase
2025-05-18 22:54:38 +08:00
committed by takase1121
parent ce16538903
commit a23866511d
3 changed files with 149 additions and 15 deletions
+4
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@@ -41,5 +41,9 @@ sips -s dpiWidth 144 -s dpiHeight 144 macos/background@2x.png
`sips` and `tiffutil` are available by default on macOS.
### Other Files
- `shell.html`: A shell file for use with WASM builds.
[1]: https://mesonbuild.com/Cross-compilation.html
+58 -15
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@@ -1,26 +1,62 @@
# cross file for WASM.
# use this file by running meson setup --cross-file resources/cross/wasm.txt <builddir>
# Cross file for WASM.
# Use this file by running meson setup --cross-file resources/cross/wasm.txt <builddir>
# You can import other cross files after this one to override the options.
[constants]
# a list of functions that can run without being asyncified; proceed with caution
# A list of functions that can run without being asyncified; proceed with caution
asyncify_ignores = '["SDL_BlitScaled","SDL_UpperBlitScaled","SDL_MapRGB*","SDL_FillRect","SDL_FreeSurface","SDL_CreateRGBSurface","SDL_GetWindowSurface","SDL_PollEvent","SDL_CreateSystemCursor","SDL_SetWindowTitle","SDL_SetCursor","SDL_GetWindowSize","SDL_GetWindowPosition","lua_push*","lua_rawget*","luaL_check*","pcre2*","FT_*","Bezier_*","g_*","FT_*","ft_*","TT_*","tt_*","__*","*printf","gray_*","fopen","fclose","fread","fflush","qsort","sift"]'
# enable advising for optimizing the list above; disable this to prevent flooding logs
# Enable advising for optimizing the list above; disable this to prevent flooding logs
asyncify_advise = '0'
# initial heap size in bytes; make sure it is not too low (around 64mb - 250mb)
# Stack size for asyncify; increase this if you have problems with asyncify-induced crashes
asyncify_stack_size = '6144'
# Initial heap size in bytes; make sure it is not too low (around 64mb - 250mb)
initial_heap = '104857600'
# Emscripten is not always added to PATH.
# Replace this variable with the path to Emscripten;
# or supply a second machine file that defines this variable.
toolchain = ''
# The memory allocator to use. You shouldn't need to change this,
# but other allocator might offer more performance at the cost of binary size.
malloc_impl = 'emmalloc'
# Functions exported by the main module.
# This is needed if you plan to load shared libraries which need symbols from the main binary.
# e.g. stdout, stderr, fopen, etc. Use another cross file to override this value.
exported_functions = '_main'
# Exported Filesystem modules.
# For example, you can put '-lidbfs.js' to export IDBFS for later use.
exported_filesystems = []
# Exported JS values in Module.
# This is needed to preserve symbols after tree shaking.
exported_js_values = '[]'
# Extra link options passed to the linker.
extra_link_options = []
# In order to run Lite XL, you will also need to bundle the /data directory.
# The following option is added to the linking process to bundle the /data directory.
# If you want to do this manually or the automatic bundling process does not work,
# comment out the following line.
bundle_paths = ['--preload-file', '../data@/usr/share/lite-xl/']
[binaries]
c = 'emcc'
cpp = 'em++'
ar = 'emar'
strip = 'emstrip'
cmake = ['emmake', 'cmake']
pkg-config = ['emconfigure', 'pkg-config']
sdl2-config = ['emconfigure', 'sdl2-config']
c = toolchain / 'emcc'
cpp = toolchain / 'em++'
ar = toolchain / 'emar'
strip = toolchain / 'emstrip'
cmake = [toolchain / 'emmake', 'cmake']
pkg-config = [toolchain / 'emconfigure', 'pkg-config']
sdl2-config = [toolchain / 'emconfigure', 'sdl2-config']
file_packager = ['python3', toolchain / 'tools/file_packager.py']
[properties]
@@ -28,16 +64,23 @@ needs_exe_wrapper = true
[built-in options]
c_args = []
c_args = ['-fPIC']
c_link_args = []
cpp_args = []
cpp_args = ['-fPIC']
cpp_link_args = []
[project options]
buildtype = 'release'
c_link_args = ['-s', 'ALLOW_MEMORY_GROWTH=1', '-s', 'INITIAL_MEMORY=' + initial_heap, '-s', 'ASYNCIFY=1', '-s', 'ASYNCIFY_ADVISE=' + asyncify_advise, '-s', 'ASYNCIFY_STACK_SIZE=6144', '-s', 'ASYNCIFY_REMOVE=' + asyncify_ignores, '-s', 'FORCE_FILESYSTEM=1']
portable = true
arch_tuple = 'wasm32-unknown'
wrap_mode = 'nofallback'
force_fallback_for = 'lua,pcre2,freetype2'
c_link_args = ['-sALLOW_MEMORY_GROWTH=1', '-sINITIAL_MEMORY=' + initial_heap, '-sASYNCIFY', '-sASYNCIFY_ADVISE=' + asyncify_advise, '-sASYNCIFY_STACK_SIZE=' + asyncify_stack_size, '-sASYNCIFY_REMOVE=' + asyncify_ignores, '-sFORCE_FILESYSTEM=1', '-sEXIT_RUNTIME=1', '-sMALLOC=' + malloc_impl, '-sMAIN_MODULE=1', '-sEXPORTED_FUNCTIONS=' + exported_functions, '-sEXPORTED_RUNTIME_METHODS=' + exported_js_values] + extra_link_options + bundle_paths + exported_filesystems
[pcre2:project options]
jit = 'disabled'
jit_sealloc = 'disabled'
[host_machine]
system = 'emscripten'
+87
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@@ -0,0 +1,87 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta http-equiv="x-ua-compatible" content="ie=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Lite XL</title>
<style>
/* make everything fullscreen */
html,
body,
canvas {
width: 100%;
height: 100%;
display: block;
margin: 0;
font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
text-align: center;
}
.modal {
position: fixed;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
#close {
display: none;
}
</style>
<script type="application/javascript">
var Module = {
arguments: ['/home/web_user/welcome.md'],
preRun: [function () {
ENV.LITE_PREFIX = '/usr';
FS.chdir('/home/web_user');
FS.writeFile('/home/web_user/welcome.md',
'# Welcome to Lite XL!\n\n' +
'This is an instance of Lite XL running on your browser using **JavaScript** and **WASM**.\n\n' +
'There isn\'t a lot of things you can do here; you can **create, edit and save files**,\n' +
'but they _will not be persisted_ across different tabs / sessions.\n\n' +
'Not all plugins work, and **some keyboard shortcuts might not work** if your browser\n' +
'overrides them. Nevertheless, this is pretty cool.\n');
document.getElementById('loading').style.display = 'none';
}],
onExit: function () {
document.getElementById('loading').style.display = 'none';
document.getElementById('canvas').style.display = 'none';
document.getElementById('close').style.display = 'block';
}
};
window.onload = function () {
// disable canvas right click
var canvas = document.getElementById('canvas');
var status = document.getElementById('status');
canvas.oncontextmenu = function (e) { e.preventDefault(); };
Module.canvas = canvas;
Module.setStatus = function (s) {
status.textContent = s;
};
};
</script>
<script type="application/javascript" src="./lite-xl.js"></script>
</head>
<body>
<canvas id="canvas"></canvas>
<div class="modal" id="loading">
<h2>Loading...</h2>
<p>Status: <span id="status">Unknown</span></p>
<p>If this page freezes, please check the console for any errors.</p>
</div>
<div class="modal" id="close">
<h2>Oops, Lite XL is closed!</h2>
<p>If you didn't do this intentionally, please check the console for any errors.</p>
<p>You can refresh the page to load Lite XL again.</p>
</div>
<noscript>
<p>You need to enable JavaScript and WASM for this page to work.</p>
</noscript>
</body>
</html>