Almost getting this to work with Emscripten & libSDL2

[define-private-public]

I'm very close to getting nuklear to compile out to a HTML5 & JS application using Emscript and the sdl_opengl3 demo file. I'm only running into an issue with emcc with glMapBuffer() and glUnmapBuffer(). I don't think they exist in GLES or WebGL, and that's what's causing the issue. Is there something else I could swap them out with?

[dumblob]

Take a look at #164 where these calls were replaced.

[xlab]

glMapBuffer can be replaced with glMapBufferRange for GLES 3.0.
glUnmapBuffer exists in GLES 3.0

[DeXP]

Agreed with @dumblob , cwkx's solution works. I used it in my Nuklear+ library ( nuklear_sdl_gles2.h file ). It works on Emscripten, Linux and Android. Also, it's pure OpenGL ES2, does not use VAO extension. I will PR it as demo here some later.

So:

1. Rewrite the shaders
2. Remove some glBindVertexArray(0);
3. Replace glMapBuffer with malloc, and glUnmapBuffer with glBufferSubData+free.

I took image loader code from here. You can take my ready nkc_stb_image.h.