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modified Window#set_mouse_callback to avoid unexplained segmentation fault (caused by ffcall?)

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This commit is contained in:
ser1zw 2011-05-05 18:02:20 +09:00
parent 81714f0768
commit eea97c692b
1 changed files with 10 additions and 15 deletions
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25
ext/opencv/window.cpp
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@ -298,6 +298,13 @@ rb_set_trackbar(int argc, VALUE *argv, VALUE self)
return instance;
}
void
on_mouse(int event, int x, int y, int flags, void* param) {
VALUE block = (VALUE)param;
if (rb_obj_is_kind_of(block, rb_cProc))
rb_funcall(block, rb_intern("call"), 1, cMouseEvent::new_object(event, x, y, flags));
}
/*
* call-seq:
* set_mouse_callback(&block)
@ -332,12 +339,12 @@ rb_set_mouse_callback(int argc, VALUE* argv, VALUE self)
VALUE block = Qnil;
rb_scan_args(argc, argv, "0&", &block);
void *callback = (void *)alloc_callback(&mouse_callback, block);
cvSetMouseCallback(GET_WINDOW_NAME(self), (CvMouseCallback)callback);
cvSetMouseCallback(GET_WINDOW_NAME(self), on_mouse, (void*)block);
st_table *holder;
if (st_lookup(windows, (st_data_t)DATA_PTR(self), (st_data_t*)&holder)) {
st_insert(holder, rb_cProc, block);
}else{
}
else {
rb_raise(rb_eStandardError, "window is destroied.");
}
return block;
@ -351,18 +358,6 @@ trackbar_callback(VALUE block, va_alist ap)
va_return_void(ap);
}
void
mouse_callback(VALUE block, va_alist ap)
{
va_start_void(ap);
int event = va_arg_int(ap);
int x = va_arg_int(ap);
int y = va_arg_int(ap);
int flags = va_arg_int(ap);
rb_funcall(block, rb_intern("call"), 1, cMouseEvent::new_object(event, x, y, flags));
va_return_void(ap);
}
__NAMESPACE_END_WINDOW
__NAMESPACE_END_GUI
__NAMESPACE_END_OPENCV