Quoting Thomas O Fredericks tof@danslchamp.org:
Thanks to Han's help page (http://puredata.info/docs/developer/mingw) I was able to compile a test external on windows with mingw.
I then started making a new external called getdollarzero based on getdir (from ggee) and parentdollarzero (from iemlib2). I compiled it and it works but I had to:
- remove Guenter's hack from getdir's source code
- and therefore include g_canvas.h
My question is the following: why is there a hack in the first place?
Hi,
The hack is there so that I did not have to include g_canvas.h. There is no harm including it properly, it might be even better ...
Günter
If I do not use it will my code crash PD in some way (I compiled against PD 0.4and worked fine during testing)?
As a reference, here is my code with the hack commented out :
--------- getdollarzero --------
#include "m_pd.h" #include "g_canvas.h" //needed to include g_canvas.h once the hack was commented out
/* HACK struct _glist { t_object gl_obj; // header in case we're a glist t_gobj *gl_list; // the actual data struct _gstub *gl_stub; // safe pointer handler int gl_valid; // incremented when pointers might be stale struct _glist *gl_owner; // parent glist, supercanvas, or 0 if none };
END HACK */
typedef struct getdollarzero { t_object x_ob; t_canvas * x_canvas; t_outlet* x_outlet; int x_level; } t_getdollarzero;
static void getdollarzero_bang(t_getdollarzero *x) { int i = x->x_level; t_canvas* last = x->x_canvas;
while (i>0) { i--; if (last->gl_owner) last = last->gl_owner; } // code example taken from iemlib2's parentdollarzero: // x->s_parent_unique = canvas_realizedollar((t_canvas*)this_canvas->gl_owner, gensym("$0")); // original get dir function: //outlet_symbol(x->x_outlet,canvas_getdir(last));
outlet_symbol(x->x_outlet,canvas_realizedollar(last, gensym("$0")));}
t_class *getdollarzero_class;
static void *getdollarzero_new(t_floatarg level) { t_getdollarzero *x = (t_getdollarzero *)pd_new(getdollarzero_class); x->x_canvas = canvas_getcurrent(); x->x_outlet = outlet_new(&x->x_ob, &s_); x->x_level = level; return (void *)x; }
void getdollarzero_setup(void) { getdollarzero_class = class_new(gensym("getdollarzero"), (t_newmethod)getdollarzero_new, 0, sizeof(t_getdollarzero), 0, A_DEFFLOAT,0); class_addbang(getdollarzero_class, getdollarzero_bang); }
--------- getdollarzero end --------
-- thomas ouellet fredericks, tof@danslchamp.org, montreal, canada
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