# Problem with glBlendEquationOES

**URL:** <https://forums.imgtec.com/t/problem-with-glblendequationoes/768>\
**Category:** PowerVR Insider\
**Tags:** pvrvframe\
**Created:** [July 20, 2010, 2:52am UTC](https://forums.imgtec.com/t/problem-with-glblendequationoes/768 "2010-07-20T02:52:10Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![bobgl](https://avatars.discourse-cdn.com/v4/letter/b/df705f/32.png) [@bobgl](https://forums.imgtec.com/u/bobgl)\
**Post date:** [July 20, 2010, 2:52am UTC](https://forums.imgtec.com/t/problem-with-glblendequationoes/768/1 "2010-07-20T02:52:10Z")

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I am trying to enable that extension but whatever I do, or whatever profile I select from the PowerVRFrame its always NULL…  
  
  
  
  
  
  
  
  
Here’s my code:  
  
  
  
  
  
First I try with: GL\_GLEXT\_PROTOTYPES and I got an error that glBlendEquationOES is missing…  
  
  
  
  
  
Then I try with:  
  
  
  
  
  
PFNGLBLENDEQUATIONOESPROC glBlendEquationOES = ( PFNGLBLENDEQUATIONOESPROC )eglGetProcAddress( “glBlendEquationOES” );  
  
  
  
  
  
And glBlendEquationOES is always NULL and my App crash…  
  
  
  
  
  
Any help would be GREATLY appreciated here… cuz Im really stuck!  
  
  
  
  
  
TIA!  
  
  
  
  
  
Cheers,

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**Author:** ![jacekc](https://avatars.discourse-cdn.com/v4/letter/j/ccd318/32.png) [@jacekc](https://forums.imgtec.com/u/jacekc)\
**Post date:** [July 21, 2010, 7:58am UTC](https://forums.imgtec.com/t/problem-with-glblendequationoes/768/2 "2010-07-21T07:58:43Z")

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Hi,

Thanks for your report. Indeed implementation of OES\_blend\_equation\_separate extension for GLES1 is missing although it is exposed in GL\_EXTENSIONS string. This is a bug in PVRVFrame (BRN# BRN30839) . It will be fixed in our next release

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**Author:** ![warmi](https://avatars.discourse-cdn.com/v4/letter/w/7ea924/32.png) [@warmi](https://forums.imgtec.com/u/warmi)\
**Post date:** [July 21, 2010, 8:01pm UTC](https://forums.imgtec.com/t/problem-with-glblendequationoes/768/3 "2010-07-21T20:01:19Z")

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A somewhat related question … .any chance of having OES\_vertex\_array\_object included in PVRVFrame ?  
  
  
  
  
  
Thanks

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<div class="post-metadata">

**Author:** ![jacekc](https://avatars.discourse-cdn.com/v4/letter/j/ccd318/32.png) [@jacekc](https://forums.imgtec.com/u/jacekc)\
**Post date:** [July 22, 2010, 7:55am UTC](https://forums.imgtec.com/t/problem-with-glblendequationoes/768/4 "2010-07-22T07:55:57Z")

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it will be implemented in some of the next releases.

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**Author:** ![GordonMaclachlan](https://avatars.discourse-cdn.com/v4/letter/g/c68b51/32.png) [@GordonMaclachlan](https://forums.imgtec.com/u/GordonMaclachlan)\
**Post date:** [September 22, 2010, 3:10pm UTC](https://forums.imgtec.com/t/problem-with-glblendequationoes/768/5 "2010-09-22T15:10:47Z")

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The release that has just gone live (2.7) has the glBlendEquationOES issue fixed.  
  
https://www.imgtec.com/powervr/insider/powervr-sdk.asp  
  
The extensions are only available under SGX profiles - please see the documentation for PVRVFrame for how to select these.