diablodale

I have an external, and within it want to create a jit.gl.shader. I request assistance in correctly retrieving the default/auto drawto context name. All else seems to be working. Below is pseudo-code...

x-&gt;psymDrawTo = _jit_sym_nothing;
jitGLShader = (t_jit_object *)jit_object_new(_sym_jit_gl_shader, x-&gt;psymDrawTo);

If I leave the context name as _jit_sym_nothing, I am hoping that the jitter object shader will take on the auto/default context name after the render has been banged; the same as I see on native box jit.gl.shader's. What I experience, is that sometimes I can retrieve the auto/default generated drawto context name and other times I continue to retrieve _jit_sym_nothing. It might relate to 

 I create the jitter shader object (before the 1st bang or after) but I haven't clearly seen the pattern.

t_max_err max_myobject_drawto_get(t_max_myobject *x, t_object *attr, long *argc, t_atom **argv)
{
    char alloc;
    t_symbol *psymDrawTo;
    t_max_err memErr;

    memErr = atom_alloc(argc, argv, &amp;alloc); // allocate return atom
    if (!memErr)
    {
        if (x-&gt;psymShaderName)
        {
            t_jit_object *jitGLShader;
            if (jitGLShader = (t_jit_object *)jit_object_findregistered(x-&gt;psymShaderName))
            {
                // BUGBUG the auto default context is usually only available if I create the shader before the 1st bang
                if (psymDrawTo = jit_attr_getsym(jitGLShader, _sym_drawto))
                {
                    DEBUGPOST("found jit-&gt;drawto-&gt;s_name: %s", psymDrawTo-&gt;s_name);
                }
                else
                {
                    DEBUGPOST("pointer to drawto sym is NULL");
                    psymDrawTo = _jit_sym_nothing;
                }
            }
            else
            {
                DEBUGPOST("jit_object_findregistered(%s) failed", x-&gt;psymShaderName-&gt;s_name);
                psymDrawTo = _jit_sym_nothing;
            }
        }
        else
        {
            psymDrawTo = x-&gt;psymDrawTo;
        }
        atom_setsym(*argv, psymDrawTo);
        return MAX_ERR_NONE;
    }
    else
    {
        return memErr;
    }
}


If I leave the context name as _jit_sym_nothing, I am hoping that the jitter object shader will take on the auto/default context name after the render has been banged; the same as I see on native box jit.gl.shader's. What I experience, is that sometimes I can retrieve the auto/default generated drawto context name and other times I continue to retrieve _jit_sym_nothing. It might relate to when I create the jitter shader object (before the 1st bang or after) but I haven't clearly seen the pattern.

t_max_err max_myobject_drawto_get(t_max_myobject *x, t_object *attr, long *argc, t_atom **argv)
{
	char alloc;
	t_symbol *psymDrawTo;
	t_max_err memErr;

	memErr = atom_alloc(argc, argv, &amp;alloc); // allocate return atom
	if (!memErr)
	{
		if (x-&gt;psymShaderName)
		{
			t_jit_object *jitGLShader;
			if (jitGLShader = (t_jit_object *)jit_object_findregistered(x-&gt;psymShaderName))
			{
				// BUGBUG the auto default context is usually only available if I create the shader before the 1st bang
				if (psymDrawTo = jit_attr_getsym(jitGLShader, _sym_drawto))
				{
					DEBUGPOST("found jit-&gt;drawto-&gt;s_name: %s", psymDrawTo-&gt;s_name);
				}
				else
				{
					DEBUGPOST("pointer to drawto sym is NULL");
					psymDrawTo = _jit_sym_nothing;
				}
			}
			else
			{
				DEBUGPOST("jit_object_findregistered(%s) failed", x-&gt;psymShaderName-&gt;s_name);
				psymDrawTo = _jit_sym_nothing;
			}
		}
		else
		{
			psymDrawTo = x-&gt;psymDrawTo;
		}
		atom_setsym(*argv, psymDrawTo);
		return MAX_ERR_NONE;
	}
	else
	{
		return memErr;
	}
}


difficulty getting drawto default context name via SDK C API with jitter object