emscripten

I have a c++ project I would like to convert to a web application. For this purpose, I would like to use Emscripten to build the project. The project uses some external libraries. I managed to compile or find the JavaScript version of most libraries and now I am stuck with the Boost ones. Actually I do not even know how to start for Boost: they use a boostrap script to generate the files to build the libraries. It is possible to pass the toolset to this script but Emscripten is obviously not supported. My project uses the following parts of Boost: Thread, Regex, FileSystem, Signals, System.

I am new to Emscripten/javascript as well as this Overstack community. I apologize, in advance, if my situation has already been addressed. From a windows 7 environment, I've used emcc to compile a simple c program which accepts an array and modifies it (see below). double* displayArray(double *doubleVector) { for (int cnt = 0; cnt < 3; cnt++) printf("doubleVector[%d] = %f\n", cnt, doubleVector[cnt]); doubleVector[0] = 98; doubleVector[1] = 99; doubleVector[2] = 100; for (int cnt1 = 0; cnt1 < 3; cnt1++) printf("modified doubleVector[%d] = %f\n", cnt1, doubleVector[cnt1]); return doubleVector;

I'm rendering the same scene using the same exact C++ code, once to native OpenGL on windows and once using Emscripten to WebGL. Everything in the scene looks exactly the same, except when I'm rendering something with alpha != 1.0. The difference looks like this: The blue cube color is (0.0, 0.0, 1.0, 0.5) The shader used for rendering the cube does nothing except draw the color. On the right is how it looks with OpenGL and is the expected result, just blue with half transparency. On the left is how it looks with Emscripten+WebGL. It looks like the color which is rendered is actually (0.5, 0.5