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EGL Pixbuffer is slow

Note: This was originally posted on 25th February 2013 at http://forums.arm.com

Hi All,

I'm having a 1k*1k*rgb texture that is rendered using shader and I want to copy the pixels to buffer so that I use Opencv with it. I tried glreadpixels and its very slow, I tried Pixbuffer of Egl, it has the same perforamance its very slow 7FPS. I'm using Mali400 on Exynos4412

Here is the code
Please view it in pastebin, there is a problem with code posting here

http://pastebin.com/TwrtF0EG

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Ahmed Tolba over 12 years ago

Note: This was originally posted on 5th March 2013 at http://forums.arm.com

Thanks for your reply.

I'm trying to do some GPU Processing like thresholding an image, then get the result from the GPU to the CPU and do some OpenCV operations.

The way to transfeer the data from the GPU to CPU using glreadpixels or eglpixel buffer is really slow.
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Ahmed Tolba over 12 years ago

Note: This was originally posted on 5th March 2013 at http://forums.arm.com

Thanks for your reply.

I'm trying to do some GPU Processing like thresholding an image, then get the result from the GPU to the CPU and do some OpenCV operations.

The way to transfeer the data from the GPU to CPU using glreadpixels or eglpixel buffer is really slow.
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