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[HTML5] GDNative support via SIDE_MODULE.

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Working with emscripten >= 2.0.10
This commit is contained in:
Fabio Alessandrelli 2020-10-24 16:02:09 +02:00
parent 1167ab96e9
commit ca34b5e57a
8 changed files with 109 additions and 33 deletions
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25
platform/javascript/detect.py
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@ -23,6 +23,7 @@ def get_opts():
# eval() can be a security concern, so it can be disabled.
BoolVariable("javascript_eval", "Enable JavaScript eval interface", True),
BoolVariable("threads_enabled", "Enable WebAssembly Threads support (limited browser support)", False),
BoolVariable("gdnative_enabled", "Enable WebAssembly GDNative support (produces bigger binaries)", False),
BoolVariable("use_closure_compiler", "Use closure compiler to minimize JavaScript code", False),
]
@ -85,10 +86,8 @@ def configure(env):
# LTO
if env["use_lto"]:
env.Append(CCFLAGS=["-s", "WASM_OBJECT_FILES=0"])
env.Append(LINKFLAGS=["-s", "WASM_OBJECT_FILES=0"])
env.Append(CCFLAGS=["-flto"])
env.Append(LINKFLAGS=["-flto"])
env.Append(CCFLAGS=["-flto=full"])
env.Append(LINKFLAGS=["-flto=full"])
# Closure compiler
if env["use_closure_compiler"]:
@ -135,6 +134,9 @@ def configure(env):
if env["javascript_eval"]:
env.Append(CPPDEFINES=["JAVASCRIPT_EVAL_ENABLED"])
if env["threads_enabled"] and env["gdnative_enabled"]:
raise Exception("Threads and GDNative support can't be both enabled due to WebAssembly limitations")
# Thread support (via SharedArrayBuffer).
if env["threads_enabled"]:
env.Append(CPPDEFINES=["PTHREAD_NO_RENAME"])
@ -146,14 +148,15 @@ def configure(env):
else:
env.Append(CPPDEFINES=["NO_THREADS"])
if env["gdnative_enabled"]:
env.Append(CCFLAGS=["-s", "RELOCATABLE=1"])
env.Append(LINKFLAGS=["-s", "RELOCATABLE=1"])
env.extra_suffix = ".gdnative" + env.extra_suffix
# Reduce code size by generating less support code (e.g. skip NodeJS support).
env.Append(LINKFLAGS=["-s", "ENVIRONMENT=web,worker"])
# We use IDBFS in javascript_main.cpp. Since Emscripten 1.39.1 it needs to
# be linked explicitly.
env.Append(LIBS=["idbfs.js"])
env.Append(LINKFLAGS=["-s", "BINARYEN=1"])
# Wrap the JavaScript support code around a closure named Godot.
env.Append(LINKFLAGS=["-s", "MODULARIZE=1", "-s", "EXPORT_NAME='Godot'"])
# Allow increasing memory buffer size during runtime. This is efficient
@ -164,12 +167,14 @@ def configure(env):
# This setting just makes WebGL 2 APIs available, it does NOT disable WebGL 1.
env.Append(LINKFLAGS=["-s", "USE_WEBGL2=1"])
# Do not call main immediately when the support code is ready.
env.Append(LINKFLAGS=["-s", "INVOKE_RUN=0"])
# Allow use to take control of swapping WebGL buffers.
env.Append(LINKFLAGS=["-s", "OFFSCREEN_FRAMEBUFFER=1"])
# callMain for manual start, FS for preloading, PATH and ERRNO_CODES for BrowserFS.
# callMain for manual start.
env.Append(LINKFLAGS=["-s", "EXTRA_EXPORTED_RUNTIME_METHODS=['callMain']"])
# Add code that allow exiting runtime.
env.Append(LINKFLAGS=["-s", "EXIT_RUNTIME=1"])