Messy, but monumental: PyTexture::pyObject works

this also coincidentally fixes a weird bug I encountered while
(mis?)using tp_alloc: by using PyType_GenericAlloc, I avoid the segfault
that tp_alloc sometimes causes. See the horrible UIDrawable retrieval
macro that I use in UI.h for a workaround that can probably be replaced
with this technique

src/PyTexture.cpp

@@ -1,4 +1,6 @@
 #include "PyTexture.h"
+using namespace mcrfpydef;
+
 
 PyTexture::PyTexture(std::string filename, int sprite_w, int sprite_h)
 : source(filename), sprite_width(sprite_w), sprite_height(sprite_h)
@@ -15,6 +17,17 @@ PyTexture::PyTexture(std::string filename, int sprite_w, int sprite_h)
     }
 }
 
+/* // bit misguided here: holding self might prevent the shared_ptr from ever being released.
+PyTexture::~PyTexture()
+{
+    if (self != NULL)
+    {
+        (PyTextureObject*)self->data.reset();
+        Py_DECREF(self);
+    }
+}
+*/
+
 sf::Sprite PyTexture::sprite(int index, sf::Vector2f pos,  sf::Vector2f s)
 {
     int tx = index % sheet_width, ty = index / sheet_width;
@@ -25,6 +38,28 @@ sf::Sprite PyTexture::sprite(int index, sf::Vector2f pos,  sf::Vector2f s)
     return sprite;
 }
 
+PyObject* PyTexture::pyObject()
+{
+    //PyTextureObject* self = (PyTextureObject*)pynew(&mcrfpydef::PyTextureType, NULL, NULL);
+    std::cout << "tp_alloc (GenericAlloc)" << std::endl;
+    //PyObject* obj = ((&PyTextureType)->tp_alloc(&PyTextureType, 0));
+    //PyObject* obj = pynew(&PyTextureType);
+    PyObject* obj = PyType_GenericAlloc(&PyTextureType, 0);
+    std::cout << "alloc worked" << std::endl;
+    //Py_INCREF(self);
+    try {
+        std::cout << "assign data to self" << std::endl;
+        ((PyTextureObject*)obj)->data = shared_from_this();
+    }
+    catch (std::bad_weak_ptr& e)
+    {
+        std::cout << "Bad weak ptr: shared_from_this() failed" << std::endl;
+    }
+    // TODO - shared_from_this will raise an exception if the object does not have a shared pointer. Constructor should be made private; write a factory function
+    std::cout << "returning PyObject" << std::endl;
+    return obj;
+}
+
 Py_hash_t PyTexture::hash(PyObject* obj)
 {
     auto self = (PyTextureObject*)obj;