# glBlendEquationOES 0 pointer from eglGetProcAddres

**URL:** <https://forums.imgtec.com/t/glblendequationoes-0-pointer-from-eglgetprocaddres/617>\
**Category:** PowerVR Insider\
**Tags:** pvrvframe\
**Created:** [February 27, 2010, 11:36am UTC](https://forums.imgtec.com/t/glblendequationoes-0-pointer-from-eglgetprocaddres/617 "2010-02-27T11:36:02Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![gersen](https://avatars.discourse-cdn.com/v4/letter/g/3da27b/32.png) [@gersen](https://forums.imgtec.com/u/gersen)\
**Post date:** [February 27, 2010, 11:36am UTC](https://forums.imgtec.com/t/glblendequationoes-0-pointer-from-eglgetprocaddres/617/1 "2010-02-27T11:36:02Z")

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Hi all,  
  
I’ve tried to access from the latest windows’ opengles 1.1 sdk to some gles extensions but for some eglGetProcAddress return a valid pointer but for others it return always NULL. I’ve tried using different Hardware Profiles from PVRVFRAME with no luck.   
  
More precisely I’m tring to retrieve those functions:  
&nbsp;&nbsp;&nbsp; glBlendEquationOES = (PFNGLBLENDEQUATIONOESPROC)eglGetProcAddress(“glBlendEquationOES”);  
&nbsp;&nbsp;&nbsp; glBlendFuncSeparateOES = (PFNGLBLENDFUNCSEPARATEOESPROC)eglGetProcAddress(“glBlendFuncSeparateOES”);  
&nbsp;&nbsp;&nbsp; glBlendEquationSeparateOES = (PFNGLBLENDEQUATIONSEPARATEOESPROC)eglGetProcAddress(“glBlendEquationSeparateOES”);  
  
and they’re always NULL. They are listed as supported from the extension list (ie GL\_OES\_blend\_func\_separate and GL\_OES\_blend\_equation\_separate are present) but I can’t get the address of the functions.  
  
Is there a bug on the emulator library?