gi/pygi-foreign-cairo.c

   1 /* -*- mode: C; c-basic-offset: 4; indent-tabs-mode: nil; -*- */
   2 /*
   3  * Copyright (c) 2010  Collabora Ltd. <http://www.collabora.co.uk/>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to
   7  * deal in the Software without restriction, including without limitation the
   8  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   9  * sell copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <cairo.h>
  25 #include <Python.h>
  26
  27 #if PY_VERSION_HEX < 0x03000000
  28 #include <pycairo.h>
  29 #else
  30 #include <pycairo/py3cairo.h>
  31 #endif
  32
  33 static Pycairo_CAPI_t *Pycairo_CAPI;
  34
  35 #include "pygi-foreign.h"
  36
  37 #include <pyglib-python-compat.h>
  38
  39 PyObject *
  40 cairo_context_to_arg (PyObject        *value,
  41                       GIInterfaceInfo *interface_info,
  42                       GITransfer       transfer,
  43                       GIArgument      *arg)
  44 {
  45     cairo_t *cr;
  46
  47     g_assert (transfer == GI_TRANSFER_NOTHING);
  48
  49     cr = PycairoContext_GET (value);
  50     if (!cr) {
  51         return NULL;
  52     }
  53
  54     arg->v_pointer = cr;
  55     Py_RETURN_NONE;
  56 }
  57
  58 PyObject *
  59 cairo_context_from_arg (GIInterfaceInfo *interface_info, gpointer data)
  60 {
  61     cairo_t *context = (cairo_t*) data;
  62
  63     cairo_reference (context);
  64
  65     return PycairoContext_FromContext (context, &PycairoContext_Type, NULL);
  66 }
  67
  68 PyObject *
  69 cairo_context_release (GIBaseInfo *base_info,
  70                        gpointer    struct_)
  71 {
  72     cairo_destroy ( (cairo_t*) struct_);
  73     Py_RETURN_NONE;
  74 }
  75
  76
  77 PyObject *
  78 cairo_surface_to_arg (PyObject        *value,
  79                       GIInterfaceInfo *interface_info,
  80                       GITransfer       transfer,
  81                       GIArgument      *arg)
  82 {
  83     cairo_surface_t *surface;
  84
  85     g_assert (transfer == GI_TRANSFER_NOTHING);
  86
  87     surface = ( (PycairoSurface*) value)->surface;
  88     if (!surface) {
  89         PyErr_SetString (PyExc_ValueError, "Surface instance wrapping a NULL surface");
  90         return NULL;
  91     }
  92
  93     arg->v_pointer = surface;
  94     Py_RETURN_NONE;
  95 }
  96
  97 PyObject *
  98 cairo_surface_from_arg (GIInterfaceInfo *interface_info, gpointer data)
  99 {
 100     cairo_surface_t *surface = (cairo_surface_t*) data;
 101
 102     cairo_surface_reference (surface);
 103
 104     return PycairoSurface_FromSurface (surface, NULL);
 105 }
 106
 107 PyObject *
 108 cairo_surface_release (GIBaseInfo *base_info,
 109                        gpointer    struct_)
 110 {
 111     cairo_surface_destroy ( (cairo_surface_t*) struct_);
 112     Py_RETURN_NONE;
 113 }
 114
 115 static PyMethodDef _gi_cairo_functions[] = { {0,} };
 116 PYGLIB_MODULE_START(_gi_cairo, "_gi_cairo")
 117 {
 118 #if PY_VERSION_HEX < 0x03000000
 119     Pycairo_IMPORT;
 120 #else
 121     Pycairo_CAPI = (Pycairo_CAPI_t*) PyCapsule_Import("cairo.CAPI", 0);
 122 #endif
 123
 124     if (Pycairo_CAPI == NULL)
 125         return PYGLIB_MODULE_ERROR_RETURN;
 126
 127     pygi_register_foreign_struct ("cairo",
 128                                   "Context",
 129                                   cairo_context_to_arg,
 130                                   cairo_context_from_arg,
 131                                   cairo_context_release);
 132
 133     pygi_register_foreign_struct ("cairo",
 134                                   "Surface",
 135                                   cairo_surface_to_arg,
 136                                   cairo_surface_from_arg,
 137                                   cairo_surface_release);
 138 }
 139 PYGLIB_MODULE_END;