Does not draw the UI

[coderobe]

The GUI is either:

• not being drawn at all
• drawn off-screen
• invisible

WebGL is not logging any errors.

[coderobe]

Possible sources:

• the vertex shader https://github.com/coderobe/emscripten-sdl-gl-gui-test/blob/master/platform_sdl.cpp#L85
• the fragment shader https://github.com/coderobe/emscripten-sdl-gl-gui-test/blob/master/platform_sdl.cpp#L102
• the render method https://github.com/coderobe/emscripten-sdl-gl-gui-test/blob/master/platform_sdl.cpp#L243
• the render loop https://github.com/coderobe/emscripten-sdl-gl-gui-test/blob/master/main.cpp#L62
• the initialization https://github.com/coderobe/emscripten-sdl-gl-gui-test/blob/master/main.cpp#L81