Teaser for a game I'm working on...

[Jasoco]

I don't suppose that would help me if I need a specific number of buffers but the computer only allows a couple and the pcall still passes the test.

[Robin]

I don't suppose that would help me if I need a specific number of buffers but the computer only allows a couple and the pcall still passes the test.

You could put the creation of framebuffers in a function (in a loop or whatever), and pcall that function. If it fails, you know you don't have enough framebuffers and you need to fall back to something else.

[Jasoco]

I don't suppose that would help me if I need a specific number of buffers but the computer only allows a couple and the pcall still passes the test.

You could put the creation of framebuffers in a function (in a loop or whatever), and pcall that function. If it fails, you know you don't have enough framebuffers and you need to fall back to something else.

And if it succeeds, I won't have to call it again, right?

When you say "success, result", does that mean pcall returns true for success and whatever the result of the function is for the function as result?

Edit: Did a little test. I got two different results:

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success, result = pcall(createBuffers)

Returns "true, true"

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success, result = pcall(createBuffers())

Returns "false, attempt to call a boolean value"

What's up with the second one? Do I need to leave the () off? What if I need to pass variables to the function?

[bartbes]

I'm not sure what that createBuffers() function do, but I suspect it returns a boolean value, which pcall then tries to call. Pcall calls for you, so you don't call the function yourself.

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--from
error("Demo")
--to
pcall(error, "Demo")

The first will error, the second will return false, "Demo".

[Jasoco]

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function createBuffers()
  fb = {
    floor = gr.newFramebuffer(math.max(g.w,256), math.max(g.h,256)),
    objects = gr.newFramebuffer(math.max(g.w,256), math.max(g.h,256)),
    osd = gr.newFramebuffer(math.max(g.w,256), math.max(g.h,256)),
    rays = gr.newFramebuffer(math.max(g.w,256), math.max(g.h,256)),
    scroll = gr.newFramebuffer(math.max(g.w,512), math.max(g.h,512))
  }
  for i, f in pairs(fb) do
    f:setFilter("nearest", "nearest")
  end
  return true
end

It doesn't really need to return anything. I just return true for the hell of it.

I want to use as little buffers as possible, but still want to make as much use of them as possible. What would you say a safe number is? I'd like to use at most 8. Right now I have 5. And the first isn't really needed.