Sonic Engine is blurry again

[fsih]

Expected Behavior

Sonic Engine text used to be crisp on reasonably performant devices

Actual Behavior

Sonic Engine's giant texture has regressed to being blurry again

Steps to Reproduce

See https://scratch.mit.edu/projects/74711180/

Operating System and Browser

Mac OSX Chrome

[adroitwhiz]

It looks like this has been happening since #393.

Instead of backing off if a texture fails to render, the maximum texture size can be queried directly via gl.getParameter(gl.MAX_TEXTURE_SIZE).

There's still the question of what happens if you allocate too many large textures and run out of VRAM-- as far as I can tell, different browsers and possibly even different hardware may do different things.

[adroitwhiz]

Try running this on your test hardware:
texture-allocation-test.zip

On my machine (Linux, NVIDIA GTX 780 Ti), both Firefox and Chromium happily eat up all my RAM creating textures beyond what can fit into VRAM at once.

I'd be interested to know if the same happens for the Chromebook mentioned in #393, or if it causes the WebGL context to be lost.