Re: Misc: Applications of small floating point formats.

On 8/2/2024 10:33 PM, Lawrence D'Oliveiro wrote:

On Fri, 2 Aug 2024 21:14:33 -0500, BGB wrote:
 

On 8/2/2024 8:35 PM, Lawrence D'Oliveiro wrote:
>

On Fri, 2 Aug 2024 17:18:17 -0700, Chris M. Thomasson wrote:
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Taking a screen shot? glReadPixels is okay, right?

>
That means grabbing the whole screen, regardless of what else it might
be showing, assuming your window it not occluded, and it further
assumes you have a screen to grab from. This kind of precludes running
the renderer as a batch, background process.

>
The glReadPixels call doesn't grab an image from the OS desktop, but
rather from one of the internal framebuffers associated with the OpenGL
context.

 Still lousy performance, though. That is simply not considered a serious
usage scenario for OpenGL. And not for any other on-screen 3D API, as far
as I’m aware.

Afaict, it's fine for taking a snapshot. I used it to create the following animation as a series of frames:
Fractal Boom Box:
https://youtu.be/n13GHyYEfLA