Relintai/sdl2_frt
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sdl2_frt/docs/README-emscripten.md
Edward Rudd b88ca1b4a6 the last parameter of XChangeProperty is the number of elements.. and when the element format is 32.. the element is "long" so we have 5 long elements here. 
Yes this seems confusing as on mac+linux Long is either 32 or 64bits depending on the architecture, but this is how the X11 protocol is defined. Thus 5 is the correct value for the nelts here.  Not 5 or 10 depending on the architecture.

More info on the confusion https://bugs.freedesktop.org/show_bug.cgi?id=16802
2015-02-10 16:28:56 -05:00

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Emscripten

Build:

$ emconfigure ./configure --host=asmjs-unknown-emscripten --disable-assembly --disable-threads --enable-cpuinfo=false CFLAGS="-O2"
$ emmake make

Or with cmake:

$ emconfigure cmake ..
$ make

To build one of the tests:

$ cd test/
$ emcc -O2 --js-opts 0 -g4 testdraw2.c -I../include ../build/.libs/libSDL2.a ../build/libSDL2_test.a -o a.html

Uses GLES2 renderer or software

tests: https://dl.dropboxusercontent.com/u/17360362/SDL2-em/index.html

Some other SDL2 libraries can be easily built (assuming SDL2 is installed somewhere):

SDL_mixer (http://www.libsdl.org/projects/SDL_mixer/)

$ EMCONFIGURE_JS=1 emconfigure ../configure
build as usual...

SDL_gfx (http://cms.ferzkopp.net/index.php/software/13-sdl-gfx):

$ EMCONFIGURE_JS=1 emconfigure ../configure --disable-mmx
build as usual...