opengl - Can't get subroutine info for specified shader type -


i using separated shader objects programs , trying integrate subroutines.

i acquire subroutine indices using glgetsubroutineindex() .then set current subroutine :

gluniformsubroutinesuiv(gl_fragment_shader,1,&( _subrotines.find(method)->second));

i getting following opengl error message:

"id:1282 , severity:high , message: gl_invalid_operation error generated.could note subroutine info specified shader type. "

here how define subroutines in fragment shader:

subroutine vec4 rendermode(); subroutine uniform rendermode rendermode;  subroutine (rendermode) vec4 lightsmode(){      // returns color  }   subroutine (rendermode) vec4 colormode(){      // returns color  }  void main(void){     vec4 fragout =rendermode();    output=  fragout; }

it did work ok when used regular shader programs doesn't seem work separate.

you need have shader program in use before selecting subroutine gluniformsubroutinesuiv(). steps be:

gluseprogram(program); gluniformsubroutinesuiv(...); gluseprogram(0);

keep in mind unusing program reset subroutine selection. have call gluniformsubroutinesuiv() again.


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