source/blender/python/intern/bpy_app_opensubdiv.cc

   1 /* SPDX-FileCopyrightText: 2023 Blender Authors
   2  *
   3  * SPDX-License-Identifier: GPL-2.0-or-later */
   4
   5 /** \file
   6  * \ingroup pythonintern
   7  */
   8
   9 #include "BLI_utildefines.h"
  10 #include <Python.h>
  11
  12 #include "bpy_app_opensubdiv.hh"
  13
  14 #include "../generic/py_capi_utils.hh"
  15
  16 #ifdef WITH_OPENSUBDIV
  17 #  include "opensubdiv_capi.hh"
  18 #endif
  19
  20 static PyTypeObject BlenderAppOpenSubdivType;
  21
  22 static PyStructSequence_Field app_opensubdiv_info_fields[] = {
  23     {"supported", "Boolean, True when Blender is built with OpenSubdiv support"},
  24     {"version", "The OpenSubdiv version as a tuple of 3 numbers"},
  25     {"version_string", "The OpenSubdiv version formatted as a string"},
  26     {nullptr},
  27 };
  28
  29 static PyStructSequence_Desc app_opensubdiv_info_desc = {
  30     /*name*/ "bpy.app.opensubdiv",
  31     /*doc*/ "This module contains information about OpenSubdiv blender is linked against",
  32     /*fields*/ app_opensubdiv_info_fields,
  33     /*n_in_sequence*/ ARRAY_SIZE(app_opensubdiv_info_fields) - 1,
  34 };
  35
  36 static PyObject *make_opensubdiv_info()
  37 {
  38   PyObject *opensubdiv_info;
  39   int pos = 0;
  40
  41   opensubdiv_info = PyStructSequence_New(&BlenderAppOpenSubdivType);
  42   if (opensubdiv_info == nullptr) {
  43     return nullptr;
  44   }
  45
  46 #ifndef WITH_OPENSUBDIV
  47 #  define SetStrItem(str) \
  48     PyStructSequence_SET_ITEM(opensubdiv_info, pos++, PyUnicode_FromString(str))
  49 #endif
  50
  51 #define SetObjItem(obj) PyStructSequence_SET_ITEM(opensubdiv_info, pos++, obj)
  52
  53 #ifdef WITH_OPENSUBDIV
  54   const int curversion = openSubdiv_getVersionHex();
  55   SetObjItem(PyBool_FromLong(1));
  56   SetObjItem(PyC_Tuple_Pack_I32({curversion / 10000, (curversion / 100) % 100, curversion % 100}));
  57   SetObjItem(PyUnicode_FromFormat(
  58       "%2d, %2d, %2d", curversion / 10000, (curversion / 100) % 100, curversion % 100));
  59 #else
  60   SetObjItem(PyBool_FromLong(0));
  61   SetObjItem(PyC_Tuple_Pack_I32({0, 0, 0}));
  62   SetStrItem("Unknown");
  63 #endif
  64
  65   if (UNLIKELY(PyErr_Occurred())) {
  66     Py_DECREF(opensubdiv_info);
  67     return nullptr;
  68   }
  69
  70 #undef SetStrItem
  71 #undef SetObjItem
  72
  73   return opensubdiv_info;
  74 }
  75
  76 PyObject *BPY_app_opensubdiv_struct()
  77 {
  78   PyObject *ret;
  79
  80   PyStructSequence_InitType(&BlenderAppOpenSubdivType, &app_opensubdiv_info_desc);
  81
  82   ret = make_opensubdiv_info();
  83
  84   /* prevent user from creating new instances */
  85   BlenderAppOpenSubdivType.tp_init = nullptr;
  86   BlenderAppOpenSubdivType.tp_new = nullptr;
  87   /* Without this we can't do `set(sys.modules)` #29635. */
  88   BlenderAppOpenSubdivType.tp_hash = (hashfunc)_Py_HashPointer;
  89
  90   return ret;
  91 }