readPixels vs. getImageData

[Nicolas Garcia Belmonte]

Hi All,

I was just wondering if there are benchmarks out there comparing doing
a framebuffer render and then readPixels in WebGL vs. drawImage +
getImageData in 2D canvas. This would be just to read pixels, I'm
wondering if using texImage2D is faster than using 2D Canvas.

Thanks,

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Nicolas Garcia Belmonte - http://philogb.github.com/

[Jan Scheurer]

Hey,

i would think that using webgl is a lot faster.

If you would like to benchmark this you could create a benchmark on jsperf.com, 

when you share it we could see how different browsers compare to each other.

Best greetings 

2013/2/4 Nicolas Garcia Belmonte <phi...@gmail.com>

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dvlpn 3d stuff since ever

[Gregg Tavares]

Just fyi, the answer is likely to change over time (meaning different versions of browsers will make different choices) and it will also change based on the size of the canvas