• Locked Locked
  • Replies 12 replies
  • Subscribers 136 subscribers
  • Views 9618 views
  • Users 0 members are here
Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

glReadPixels

Sebastien (OBSOLETE) Baudouin
Note: This was originally posted on 9th March 2012 at http://forums.arm.com

Hi all,

i try to render scene in an off screen  way, controlling the location of my pixels (the pointer is fixed by myself).
It seems that MALI400 is not supporting eglCreatePixmapSurface, interface that would allows me to create a  surface that will use pixels in the location i want.

As it is not working i have to use the API glReadPixels which is very very slow (compare to other GPU).

So i'm wondering if there is a reason for such bad perf for ReadPixels and if someone knows a way with MALI to render a scene at place (pixel buffer address) you want.

Thanks for your help.

BR

Seb
Parents
  • Note: This was originally posted on 13th June 2012 at http://forums.arm.com

    Hi guangx,

    is this a Mali GPU platform you're using?

    I'm not sure I understood the question, but on a Mali platform it should be possible to have the video decode hardware decode into an area of memory mapped by the Unified Memory Provider (UMP) module, which can then be mapped as a GL texture via EGLImage so the Mali can access it.

    HTH, Pete
Reply
  • Note: This was originally posted on 13th June 2012 at http://forums.arm.com

    Hi guangx,

    is this a Mali GPU platform you're using?

    I'm not sure I understood the question, but on a Mali platform it should be possible to have the video decode hardware decode into an area of memory mapped by the Unified Memory Provider (UMP) module, which can then be mapped as a GL texture via EGLImage so the Mali can access it.

    HTH, Pete
Children
No data