From 14539b3ed2c0bb207967a7c9a8730c8662ccd521 Mon Sep 17 00:00:00 2001 From: omar Date: Tue, 18 Aug 2020 12:34:19 +0200 Subject: [PATCH] Update Emscripten readme about emrun (#3412) --- examples/example_emscripten/README.md | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/examples/example_emscripten/README.md b/examples/example_emscripten/README.md index 597ffaf7..42bab014 100644 --- a/examples/example_emscripten/README.md +++ b/examples/example_emscripten/README.md @@ -1,19 +1,20 @@ -# How to Build +## How to Build - You need to install Emscripten from https://emscripten.org/docs/getting_started/downloads.html, and have the environment variables set, as described in https://emscripten.org/docs/getting_started/downloads.html#installation-instructions - +- You may also refer to our [Continuous Integration setup](https://github.com/ocornut/imgui/tree/master/.github/workflows) for Emscripten setup. - Depending on your configuration, in Windows you may need to run `emsdk/emsdk_env.bat` in your console to access the Emscripten command-line tools. - - Then build using `make` while in the `example_emscripten/` directory. -- For local testing, you may need a local webserver. Quoting [https://emscripten.org/docs/getting_started](https://emscripten.org/docs/getting_started/Tutorial.html#generating-html):
+## How to Run + +To run on a local machine: +- Generally you may need a local webserver. Quoting [https://emscripten.org/docs/getting_started](https://emscripten.org/docs/getting_started/Tutorial.html#generating-html):
_"Unfortunately several browsers (including Chrome, Safari, and Internet Explorer) do not support file:// [XHR](https://emscripten.org/docs/site/glossary.html#term-xhr) requests, and can’t load extra files needed by the HTML (like a .wasm file, or packaged file data as mentioned lower down). For these browsers you’ll need to serve the files using a [local webserver](https://emscripten.org/docs/getting_started/FAQ.html#faq-local-webserver) and then open http://localhost:8000/hello.html."_ -
Easy local webserver: _"For example, Python has one built in, `python -m http.server` in Python 3 or `python -m SimpleHTTPServer` in Python 2. After doing that, you can visit http://localhost:8000/."_ +- Emscripten SDK has a handy `emrun` command: `emrun example_emscripten.html` which will spawn a temporary local webserver. See https://emscripten.org/docs/compiling/Running-html-files-with-emrun.html for details. +- Otherwise you may use Python builtin webserver: `python -m http.server` in Python 3 or `python -m SimpleHTTPServer` in Python 2. After doing that, you can visit http://localhost:8000/. -Obsolete features: +## Obsolete features: - Emscripten 2.0 (August 2020) obsoleted the fastcomp back-end, only llvm is supported. -- Emscripten 1.39.0 (October 2019) obsoleted the `BINARYEN_TRAP_MODE=clamp` compilation flag which was required with version older than 1.39.0 to avoid rendering artefacts. See [#2877](https://github.com/ocornut/imgui/issues/2877) for details. If you use an older version, uncomment this line in the Makefile: - -`#EMS += -s BINARYEN_TRAP_MODE=clamp` +- Emscripten 1.39.0 (October 2019) obsoleted the `BINARYEN_TRAP_MODE=clamp` compilation flag which was required with version older than 1.39.0 to avoid rendering artefacts. See [#2877](https://github.com/ocornut/imgui/issues/2877) for details. If you use an older version, uncomment this line in the Makefile: `#EMS += -s BINARYEN_TRAP_MODE=clamp`