Instead of simply relying on the emscripten mainloop api to wake us up
periodically so that we can poll for SDL events we now pause the
emscripten mainloop whenever no redraw is queued and instead hook an
input event listener into the real browser mainloop to resume the
emscripten mainloop whenever input is received. This way the example
can go to sleep while there's no input to handle.
This provides a simple example of binding custom javascript into native
code.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit a8b1e2eda491dc7c44c84cd47e160c7b8ba0f792)
This enables basic Emscripten support in Cogl via the SDL winsys.
Assuming you have setup an emscripten toolchain you can configure Cogl
like this:
emconfigure ./configure --enable-debug --enable-emscripten
Building the examples will build .html files that can be loaded directly
by a WebGL enabled browser.
Note: at this point the emscripten support has just barely been smoke
tested so it's expected that as we continue to build on this we will
learn about more things we need to change in Cogl to full support this
environment.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit a3bc2e7539391b074e697839dfae60b69c37cf10)
