Web Assembly problems - Githubissues

paulocoutinhox commented 2 years ago

Hi,

I found this problems when compile to WASM:

1 - This line throw error that GLFW_SCALE_TO_MONITOR don't exists (screen.cpp):

glfwWindowHint(GLFW_SCALE_TO_MONITOR, GLFW_TRUE);

2 - This method glfwSetWindowContentScaleCallback throw error that don't exists (screen.cpp):

glfwSetWindowContentScaleCallback(m_glfw_window,
        [](GLFWwindow* w, float, float) {
            auto it = __nanogui_screens.find(w);
            if (it == __nanogui_screens.end())
                return;
            Screen* s = it->second;

            s->m_pixel_ratio = get_pixel_ratio(w);
            s->resize_callback_event(s->m_size.x(), s->m_size.y());
        }
    );

3 - Adding a fixed suffix .bc don't work on emsdk:

[ 83%] Linking CXX static library libnanogui.bc
em++: warning: object file output extension (.bc) used for non-object output.  If you meant to build an object file please use `-c, `-r`, or `-shared` [-Wemcc]

wasm-ld: error: unknown file type: _deps/nanogui-build/libnanogui.bc

em++: error: '/Users/paulo/.conan/data/emsdk/3.1.0/_/_/package/cf186363a0bf37e3a91ee26c25ea5d664ac71fa5/bin/upstream/bin/wasm-ld -o bin/nativium.wasm CMakeFiles/nativium.dir/modules/app-core/implementation/cpp/nativium/core/ApplicationCoreImpl.cpp.o CMakeFiles/nativium.dir/modules/app-core/gluecode/generated-src/wasm/nativium/core/NTVCoreApplicationCore.cpp.o CMakeFiles/nativium.dir/modules/support-lib/djinni/cpp/DataRef.cpp.o CMakeFiles/nativium.dir/modules/support-lib/djinni/wasm/DataRef_wasm.cpp.o CMakeFiles/nativium.dir/modules/support-lib/djinni/wasm/djinni_wasm.cpp.o _deps/nanogui-build/libnanogui.bc -L/Users/paulo/.conan/data/emsdk/3.1.0/_/_/package/cf186363a0bf37e3a91ee26c25ea5d664ac71fa5/bin/.emscripten_cache/sysroot/lib/wasm32-emscripten --whole-archive -lembind-rtti --no-whole-archive -lGL -lal -lhtml5 -lstubs-debug -lc-debug -lcompiler_rt -lc++ -lc++abi -lemmalloc -lc_rt -lsockets -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-cxx-exceptions -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --import-undefined --export-if-defined=main --export-if-defined=__start_em_asm --export-if-defined=__stop_em_asm --export-if-defined=fflush --export=emscripten_stack_get_end --export=emscripten_stack_get_free --export=emscripten_stack_init --export=stackSave --export=stackRestore --export=stackAlloc --export=__wasm_call_ctors --export=__errno_location --export=malloc --export=free --export=__cxa_is_pointer_type --export=__cxa_can_catch --export=setThrew --export-table -z stack-size=5242880 --initial-memory=16777216 --no-entry --max-memory=2147483648 --global-base=1024' failed (returned 1)
make[2]: *** [bin/nativium.js] Error 1

paulocoutinhox commented 2 years ago

I made a PR to fix all and all is working nice now. https://github.com/mitsuba-renderer/nanogui/pull/108

You can use this example to download nanogui with CPM (cmake package manager):

# cpm
include(get_cpm.cmake)

# nanogui
set(NANOGUI_BUILD_EXAMPLES OFF CACHE BOOL " " FORCE)
set(NANOGUI_BUILD_PYTHON  OFF CACHE BOOL " " FORCE)
set(NANOGUI_INSTALL       OFF CACHE BOOL " " FORCE)
set(NANOGUI_BUILD_SHARED  OFF CACHE BOOL " " FORCE)
set(NANOGUI_BUILD_GLFW    OFF CACHE BOOL " " FORCE)
set(NANOGUI_BACKEND       "GLES 3" CACHE STRING " " FORCE)

CPMAddPackage(
    NAME
    nanogui
    GIT_TAG
    wasm-fix
    GITHUB_REPOSITORY
    paulo-coutinho/nanogui
)

# add nanogui as project library
list(APPEND NATIVIUM_LIBRARY_LINKS "nanogui")

# add nano gui include as search path
nativium_add_search_path("${nanogui_SOURCE_DIR}/include")

And at least:

# wasm
set_target_properties(MY_PROJECT_NAME PROPERTIES LINK_FLAGS "-s EXPORTED_RUNTIME_METHODS=['ccall','cwrap'] --bind -s MALLOC=emmalloc -s WASM_BIGINT=1 -s USE_GLFW=3 -s ALLOW_MEMORY_GROWTH=1")

paulocoutinhox commented 2 years ago

My demo: https://nativium-nanogui.s3.amazonaws.com/demo/1.0.0/index.html

mischievous commented 2 years ago

DEAD ... Found a better way... See next comment.

After much pain I was able to get this to build on OSX also...

You have to correct an issue with emscripten a. Open your version of emcc.py b. Find the run function ... "def run (args):" c Add these lines to the very top of the run function... Because of clang being installed these args are being passed to the emcc (em++) compilers and they don't don't how to handle them as of version 3.14. This just removes the illegal args.
```
for argv in [ '-Wl,-search_paths_first', '-Wl,-headerpad_max_install_names' ]:
if argv in args:
  args.remove (argv)
```
d. Hard part is done.
Go into the nanogui directory.
Create a new directory called "web", or something appropriate; then cd to the directory.
cmake .. -DCMAKE_CXX_COMPILER=em++ -DCMAKE_C_COMPILER=emcc -Wno-dev
make
python3 -m http.server
In a webbrowser - http://127.0.0.1:8000/example1.html

mischievous commented 1 year ago

Follow the instructions from this page... (summarized) https://emscripten.org/docs/getting_started/downloads.html

git clone https://github.com/emscripten-core/emsdk.git
cd emsdk
git pull
./emsdk install latest (3.1.34)
./emsdk activate latest
source

Checkout nanogui

cd nanogui
vi CMakelists.txt a. change set(CMAKE_EXECUTABLE_SUFFIX ".bc") -> set(CMAKE_EXECUTABLE_SUFFIX ".html") :: (optional, but I could not figure out how to run with out an *.html file) b. change set(CMAKE_CXX_CREATE_STATIC_LIBRARY " -o ") -> set(CMAKE_CXX_CREATE_STATIC_LIBRARY " -r -o ") :: Will no produce a static library without it. c. add add_compile_options(-Wno-unused-command-line-argument) :: removes some warnings.
mkdir web
cd web
CXXFLAGS='-s USE_WEBGL2=1 -s USE_GLFW=3 -s WASM=1' emcmake cmake ..; emmake make
python3 -m http.server

deloverzeus commented 6 months ago

Follow the instructions from this page... (summarized) https://emscripten.org/docs/getting_started/downloads.html

git clone https://github.com/emscripten-core/emsdk.git

cd emsdk

git pull

./emsdk install latest (3.1.34)

./emsdk activate latest

source

Checkout nanogui

cd nanogui

vi CMakelists.txt a. change set(CMAKE_EXECUTABLE_SUFFIX ".bc") -> set(CMAKE_EXECUTABLE_SUFFIX ".html") :: (optional, but I could not figure out how to run with out an *.html file) b. change set(CMAKE_CXX_CREATE_STATIC_LIBRARY " -o ") -> set(CMAKE_CXX_CREATE_STATIC_LIBRARY " -r -o ") :: Will no produce a static library without it. c. add add_compile_options(-Wno-unused-command-line-argument) :: removes some warnings.

mkdir web

cd web

CXXFLAGS='-s USE_WEBGL2=1 -s USE_GLFW=3 -s WASM=1' emcmake cmake ..; emmake make

python3 -m http.server

occur some errors, overzeus@gxf188 web]$ emmake make make: make [ 2%] Running bin2c [ 4%] Building C object CMakeFiles/nanogui.dir/ext/nanovg/src/nanovg.c.o clang: error: unsupported option '-march=' for target 'wasm32-unknown-emscripten' make[2]: [CMakeFiles/nanogui.dir/build.make:95：CMakeFiles/nanogui.dir/ext/nanovg/src/nanovg.c.o] error 1 make[1]: [CMakeFiles/Makefile2:93：CMakeFiles/nanogui.dir/all] error 2 make: *** [Makefile:136：all] error 2 emmake: error: 'make' failed (returned 2)

mischievous commented 6 months ago

Do you have the correct version 3.1.34? The error sounds like you are trying to build on a mac and the "-march" is causing problems which the emsdk does not care about. My cmake building foo is not strong enough to know how to remove the "-march".

deloverzeus commented 6 months ago

Do you have the correct version 3.1.34? The error sounds like you are trying to build on a mac and the "-march" is causing problems which the emsdk does not care about. My cmake building foo is not strong enough to know how to remove the "-march".

I build on windows(MingW64)

deloverzeus commented 6 months ago

Do you have the correct version 3.1.34? The error sounds like you are trying to build on a mac and the "-march" is causing problems which the emsdk does not care about. My cmake building foo is not strong enough to know how to remove the "-march".

My emsdk version 3.1.54. I remove "-march" .I use your instructions "set(CMAKE_CXX_CREATE_STATIC_LIBRARY " -r -o ")" but the new error is : "em++: error: option '-o' requires an argument make[2]: [CMakeFiles/nanogui.dir/build.make:679：libnanogui.bc] error 1 make[1]: [CMakeFiles/Makefile2:93：CMakeFiles/nanogui.dir/all] error 2 make: *** [Makefile:136：all] error 2"

mischievous commented 6 months ago

Once emsdk is installed I think you and do a "emsdk install 3.1.34" and then "emsdk activate 3.1.34", or something like that. I would give that a try first then if it does not work move forward.

mikamyara commented 6 months ago

Hello, I have problems with nanoGui on Webassembly on fresh linux/Debian 12 install (in a dedicated VM). This is my first experience with webassembly as well as with nanogui, however I know well C/C++ and gui dev. I suceeded in installing and using nanoGui with native intel C/C++ on my main Linux machine. Well. Debian 12 proposes a package with 3.1.6 and I did not succeed in installing nanoGui. So I created a VM with still Debian 12 (but no GUI) to avoid breaking my install. In installed emsdk from sources, and what comes is 3.1.56. To follow what is previously suggested, I tried to downgrade to 3.1.34 with "emsdk install 3.1.34" and here is what comes :

emsdk install 3.1.34
Resolving SDK version '3.1.34' to 'sdk-releases-2fdd6b9e5b67d5b62f84d0501a876513ff118ef1-64bit'
Installing SDK 'sdk-releases-2fdd6b9e5b67d5b62f84d0501a876513ff118ef1-64bit'..
Skipped installing node-16.20.0-64bit, already installed.
Installing tool 'releases-2fdd6b9e5b67d5b62f84d0501a876513ff118ef1-64bit'..
Error: Downloading URL 'https://storage.googleapis.com/webassembly/emscripten-releases-builds/linux/2fdd6b9e5b67d5b62f84d0501a876513ff118ef1/wasm-binaries.tar.xz': HTTP Error 404: Not Found
Error: Downloading URL 'https://storage.googleapis.com/webassembly/emscripten-releases-builds/linux/2fdd6b9e5b67d5b62f84d0501a876513ff118ef1/wasm-binaries.tbz2': [Errno 13] Permission denied: '/home/mmyara/emsdk/downloads/2fdd6b9e5b67d5b62f84d0501a876513ff118ef1-wasm-binaries.tbz2'
Error: Downloading URL 'https://storage.googleapis.com/webassembly/emscripten-releases-builds/linux/2fdd6b9e5b67d5b62f84d0501a876513ff118ef1/wasm-binaries.tar.xz': HTTP Error 404: Not Found
error: installation failed!

So I continued with 3.1.56. So I git the nanogui :

git clone https://github.com/wjakob/nanogui.git --recursive

I think since the post the nanogui has changed as I did not find any "march" for example in the CMakeLists.txt

then followed as proposed above with :

cd nanogui
mkdir web
cd web
CXXFLAGS='-s USE_WEBGL2=1 -s USE_GLFW=3 -s WASM=1' emcmake cmake ..; emmake make

and here follows what I get :

configure: cmake .. -DCMAKE_TOOLCHAIN_FILE=/home/mmyara/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake -DCMAKE_CROSSCOMPILING_EMULATOR=/home/mmyara/emsdk/node/16.20.0_64bit/bin/node
CMake Deprecation Warning at ext/glfw/CMakeLists.txt:5 (cmake_minimum_required):
  Compatibility with CMake < 2.8.12 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.

-- Using X11 for window creation
CMake Error at /usr/share/cmake-3.25/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
  Could NOT find X11 (missing: X11_X11_LIB)
Call Stack (most recent call first):
  /usr/share/cmake-3.25/Modules/FindPackageHandleStandardArgs.cmake:600 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake-3.25/Modules/FindX11.cmake:481 (find_package_handle_standard_args)
  ext/glfw/CMakeLists.txt:190 (find_package)

-- Configuring incomplete, errors occurred!
See also "/home/mmyara/nanogui/nanogui/web/CMakeFiles/CMakeOutput.log".
emcmake: error: 'cmake .. -DCMAKE_TOOLCHAIN_FILE=/home/mmyara/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake -DCMAKE_CROSSCOMPILING_EMULATOR=/home/mmyara/emsdk/node/16.20.0_64bit/bin/node' failed (returned 1)
make: make
make: *** Pas de cible spécifiée et aucun makefile n'a été trouvé. Arrêt.
emmake: error: 'make' failed (returned 2)

So it does not work. I tried to install X11 related dev libraries as it is the problem expressed : " sudo apt-get install cmake xorg-dev libglu1-mesa-dev", no more success. Can someone help ?

regards, Mike

mischievous commented 6 months ago

Last time I touched the code was on 2023/03/15... Can you try the commit hash from before that date?

mikamyara commented 6 months ago

Here it is :

git rev-parse --verify HEAD
e9ec8a1a9861cf578d9c6e85a6420080aa715c03

mikamyara commented 6 months ago

I think I did not clone the good "nanogui" project. I try now with "mitsuba-render". Sorry. I will give news after try.

mikamyara commented 6 months ago

It is better this time but does not still work. I think the library builds ok, but not the examples. I did mainly what mischievous said :

a. change set(CMAKE_EXECUTABLE_SUFFIX ".bc") -> set(CMAKE_EXECUTABLE_SUFFIX ".html") :: (optional, but I could not figure out how to run with out an *.html file) b. change set(CMAKE_CXX_CREATE_STATIC_LIBRARY " -o ") -> set(CMAKE_CXX_CREATE_STATIC_LIBRARY " -r -o ") :: Will no produce a static library without it. c. add add_compile_options(-Wno-unused-command-line-argument) :: removes some warnings.

also removed the "march" lines (79-91)

Then

mkdir web
cd web
CXXFLAGS='-s USE_WEBGL2=1 -s USE_GLFW=3 -s WASM=1' emcmake cmake ..; emmake make

and here is what I get :

[ 78%] Linking CXX static library libnanogui.bc
[ 78%] Built target nanogui
[ 80%] Building CXX object CMakeFiles/example1.dir/src/example1.cpp.o
[ 82%] Linking CXX executable example1.html
libnanogui.bc:1:2: error: expected top-level entity
    1 | <U+0000>asm<U+0001><U+0000><U+0000><U+0000><U+0001><B8><U+0005>N`<U+0003><U+007F><U+007F><U+007F><U+0000>`<U+0003><U+007F><U+007F><U+007F><U+0001><U+007F>`<U+0001><U+007F><U+0000>`<U+0005><U+007F><U+007F><U+007F><U+007F><U+007F><U+0000>`<U+0005><U+007F><U+007F><U+007F><U+007F><U+007F><U+0001><U+007F>`<U+0006><U+007F><U+007F><U+007F><U+007F><U+007F><U+007F><U+0000>`<U+0001><U+007F><U+0001><U+007F>`<U+0002><U+007F><U+007F><U+0000>`<U+0006><U+007F><U+007F><U+007F><U+007F><U+007F><U+007F><U+0001><U+007F>`<U+0002><U+007F><U+007F><U+0001><U+007F>`<U+0004><U+007F>}}}<U+0000>`<U+0004><U+007F><U+007F><U+007F><U+007F><U+0001><U+007F>`<U+0007><U+007F><U+007F><U+007F><U+007F><U+007F><U+007F><U+007F><U+0001><U+007F>`<U+0008><U+007F><U+007F><U+007F><U+007F>}<U+007F><U+007F><U+007F><U+0000>`<U+0008><U+007F><U+007F><U+007F><U+007F>}}<U+007F><U+007F><U+0000>`<U+0004><U+007F><U+007F><U+007F><U+007F><U+0000>`<U+0001>}<U+0001>}`<U+0002>||<U+0001>|`<U+0002>}}<U+0001>}`<U+0002>|<U+007F><U+0001>|`        <U+007F><U+007F><U+007F><U+007F><U+007F><U+007F><U+007F><U+007F><U+007F><U+0000>`<U+0000><U+0001><U+007F>`<U+0007><U+007F><U+007F><U+007F><U+007F><U+007F><U+007F><U+007F><U+0000>`<U+0002><U+007F>}<U+0000>`<U+0003><U+007F>}}<U+0000>`<U+0005><U+007F>}}}}<U+0000>`<U+0001>}<U+0000>`<U+0004>}}}}<U+0000>`<U+0001>|<U+0000>`<U+0000><U+0000>`<U+0000><U+0001>|`<U+0003><U+007F>||<U+0001><U+007F>`<U+0002><U+007F>}<U+0001>}`
      |         ^
1 error generated.
em++: error: '/home/mmyara/emsdk/upstream/bin/clang++ -target wasm32-unknown-emscripten -fignore-exceptions -fvisibility=default -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --sysroot=/home/mmyara/emsdk/upstream/emscripten/cache/sysroot -DEMSCRIPTEN -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -O3 -DNDEBUG libnanogui.bc -c -o /tmp/emscripten_temp_hcg5y5ht/libnanogui_0.o' failed (returned 1)
make[2]: *** [CMakeFiles/example1.dir/build.make:101 : example1.html] Erreur 1
make[1]: *** [CMakeFiles/Makefile2:119 : CMakeFiles/example1.dir/all] Erreur 2
make: *** [Makefile:136 : all] Erreur 2
emmake: error: 'make' failed (returned 2)

mischievous commented 6 months ago

As soon as I can scratch my head I will check the git hash I have and re-try with my instructions.

mischievous commented 6 months ago

emsdk list

The recommended precompiled SDK download is 3.1.48 (694434b6d47c5f6eff2c8fbd9eeb016c977ae9dc).

To install/activate it use: latest

This is equivalent to installing/activating: 3.1.48

All recent (non-legacy) installable versions are: 3.1.48 3.1.48-asserts 3.1.47 3.1.47-asserts .... 3.1.35 3.1.35-asserts 3.1.34 INSTALLED 3.1.34-asserts 3.1.33

CXXFLAGS='-s USE_WEBGL2=1 -s USE_GLFW=3 -s WASM=1' emcmake cmake ..; emmake make configure: cmake .. -DCMAKE_TOOLCHAIN_FILE=/usr/local/Cellar/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake -DCMAKE_CROSSCOMPILING_EMULATOR=/usr/local/Cellar/emsdk/node/16.20.0_64bit/bin/node -- NanoGUI v0.2.0 -- Setting build type to 'Release' as none was specified. -- NanoGUI: using GLES 2 backend. -- NanoGUI: building static library. -- NanoGUI: not building the Python plugin. -- Configuring done (1.1s) -- Generating done (0.0s) -- Build files have been written to: /Volumes/Promise/projects/runeQuest/nanogui/web make: make [ 2%] Running bin2c CMake Deprecation Warning at /Volumes/Promise/projects/runeQuest/nanogui/resources/bin2c.cmake:1 (cmake_minimum_required): Compatibility with CMake < 3.5 will be removed from a future version of CMake.

Update the VERSION argument value or use a ... suffix to tell CMake that the project does not need compatibility with older versions.

[ 4%] Building C object CMakeFiles/nanogui.dir/ext/nanovg/src/nanovg.c.o [ 6%] Building CXX object CMakeFiles/nanogui.dir/src/texture_gl.cpp.o [ 8%] Building CXX object CMakeFiles/nanogui.dir/src/shader_gl.cpp.o [ 10%] Building CXX object CMakeFiles/nanogui.dir/src/renderpass_gl.cpp.o [ 13%] Building CXX object CMakeFiles/nanogui.dir/src/opengl.cpp.o [ 15%] Building CXX object CMakeFiles/nanogui.dir/nanogui_resources.cpp.o [ 17%] Building CXX object CMakeFiles/nanogui.dir/src/common.cpp.o [ 19%] Building CXX object CMakeFiles/nanogui.dir/src/widget.cpp.o [ 21%] Building CXX object CMakeFiles/nanogui.dir/src/theme.cpp.o [ 23%] Building CXX object CMakeFiles/nanogui.dir/src/layout.cpp.o [ 26%] Building CXX object CMakeFiles/nanogui.dir/src/screen.cpp.o [ 28%] Building CXX object CMakeFiles/nanogui.dir/src/label.cpp.o [ 30%] Building CXX object CMakeFiles/nanogui.dir/src/window.cpp.o [ 32%] Building CXX object CMakeFiles/nanogui.dir/src/popup.cpp.o [ 34%] Building CXX object CMakeFiles/nanogui.dir/src/checkbox.cpp.o [ 36%] Building CXX object CMakeFiles/nanogui.dir/src/button.cpp.o [ 39%] Building CXX object CMakeFiles/nanogui.dir/src/popupbutton.cpp.o [ 41%] Building CXX object CMakeFiles/nanogui.dir/src/combobox.cpp.o [ 43%] Building CXX object CMakeFiles/nanogui.dir/src/progressbar.cpp.o [ 45%] Building CXX object CMakeFiles/nanogui.dir/src/slider.cpp.o [ 47%] Building CXX object CMakeFiles/nanogui.dir/src/messagedialog.cpp.o [ 50%] Building CXX object CMakeFiles/nanogui.dir/src/textbox.cpp.o [ 52%] Building CXX object CMakeFiles/nanogui.dir/src/textarea.cpp.o [ 54%] Building CXX object CMakeFiles/nanogui.dir/src/imagepanel.cpp.o [ 56%] Building CXX object CMakeFiles/nanogui.dir/src/vscrollpanel.cpp.o [ 58%] Building CXX object CMakeFiles/nanogui.dir/src/colorwheel.cpp.o [ 60%] Building CXX object CMakeFiles/nanogui.dir/src/colorpicker.cpp.o [ 63%] Building CXX object CMakeFiles/nanogui.dir/src/graph.cpp.o [ 65%] Building CXX object CMakeFiles/nanogui.dir/src/tabwidget.cpp.o [ 67%] Building CXX object CMakeFiles/nanogui.dir/src/canvas.cpp.o [ 69%] Building CXX object CMakeFiles/nanogui.dir/src/texture.cpp.o [ 71%] Building CXX object CMakeFiles/nanogui.dir/src/shader.cpp.o [ 73%] Building CXX object CMakeFiles/nanogui.dir/src/imageview.cpp.o [ 76%] Building CXX object CMakeFiles/nanogui.dir/src/traits.cpp.o [ 78%] Linking CXX static library libnanogui.bc [ 78%] Built target nanogui [ 80%] Building CXX object CMakeFiles/example1.dir/src/example1.cpp.o [ 82%] Linking CXX executable example1.html [ 82%] Built target example1 [ 84%] Building CXX object CMakeFiles/example2.dir/src/example2.cpp.o [ 86%] Linking CXX executable example2.html [ 86%] Built target example2 [ 89%] Building CXX object CMakeFiles/example3.dir/src/example3.cpp.o [ 91%] Linking CXX executable example3.html [ 91%] Built target example3 [ 93%] Building CXX object CMakeFiles/example4.dir/src/example4.cpp.o [ 95%] Linking CXX executable example4.html [ 95%] Built target example4 [ 97%] Building CXX object CMakeFiles/example_icons.dir/src/example_icons.cpp.o [100%] Linking CXX executable example_icons.html [100%] Built target example_icons

mischievous commented 6 months ago

git hash... git rev-parse HEAD 2ee903c96480d4aee54542ea3c340c13cc06dc32

mischievous commented 6 months ago

If you are getting failures in the 3 files below I can do a diff and see what I changed but I think the only change was in CMakeLists.txt

git status On branch master Your branch is up to date with 'origin/master'.

Changes not staged for commit: (use "git add ..." to update what will be committed) (use "git restore ..." to discard changes in working directory) modified: CMakeLists.txt modified: include/nanogui/textbox.h modified: src/screen.cpp modified: src/textbox.cpp

mikamyara commented 6 months ago

Hello, Thanks to your help I suceeded in compiling everything ! Just something was wrong : emcc "latest" is NOT 3.1.48, it is 3.1.56, and with 3.1.56 it does not work at link time, did not understand why. Here is what I did :

git clone https://github.com/emscripten-core/emsdk.git
cd emsdk
./emsdk install 3.1.48
./emsdk activate 3.1.48
source ./emsdk_env.sh

cd ..
git clone https://github.com/mitsuba-renderer/nanogui.git --recursive
cd nanogui

For other users : please notice that at this time the last commit is 8 March 2023 (2ee903c96480d4aee54542ea3c340c13cc06dc32).

Then had to change the CMakeLists.txt including points a,b and c, as discussed before in this thread. I enclose a CMakeLists.txt file ready to work with this message, so that other users only have to copy it : CMakeLists.txt

Then :

mkdir web
cd web
CXXFLAGS='-s USE_WEBGL2=1 -s USE_GLFW=3 -s WASM=1' emcmake cmake ..; emmake make

Then start a python webserver to test :

python3 -m http.server

Then everything is ok. Thanks a lot ! I will be able now to start my project.

Just a remark, don't know if it's normal, but, in webassembly context :

example3 does not work,
example_icons does only displays a gray background rectangle.

Best Regards, Mike

mitsuba-renderer / nanogui

Web Assembly problems #107