added the Python backing code for managing resources

src/Makefile

@@ -20,7 +20,7 @@ RESOURCES=../resources
 SPLASHSCREEN=splash-erbosoft.png
 
 OBJS=main.o sysinput.o ep_init.o ep_upiwin.o ep_backlight.o ep_msg.o ep_graphics.o ep_devctxt.o ep_bitmap.o \
-     ep_upiwin_tmp.o ep_util.o fbinit.o rect.o gfxobj.o devctxt.o dc_screen.o fontengine.o \
+     ep_resources.o ep_upiwin_tmp.o ep_util.o fbinit.o rect.o gfxobj.o devctxt.o dc_screen.o fontengine.o \
 	 resources.o bitmap.o stockobj.o fbprimitive.o log.o gpio.o msg_queue.o time_func.o config.o \
 	 i_freehand.o i_line.o i_rect.o i_fillrect.o i_undo.o i_clear.o sysresources.o
 LIBS=-lpython3.7m -lcrypt -lfreetype -lbcm2835 -lzip -lpthread -ldl -lutil -lm

src/ep_init.h

@@ -35,6 +35,7 @@ extern PyObject *Epython_init_upiwin_tmp_module(void);
 
 extern HRESULT Epython_register_devctxt(PyObject *module);
 extern HRESULT Epython_register_bitmap(PyObject *module);
+extern HRESULT Epython_register_resources(PyObject *module);
 
 extern HRESULT Epython_setup(void);
 extern HRESULT Epython_run(void);

src/ep_resources.c

@@ -0,0 +1,234 @@
+/*
+ * UPIWIN - Micro Pi Windowing Framework Kernel
+ * Copyright (C) 2019 Amy Bowersox/Erbosoft Metaverse Design Solutions
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *-------------------------------------------------------------------------
+ */
+#include <string.h>
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#include "wintype.h"
+#include "scode.h"
+#include "log.h"
+#include "resources.h"
+#include "ep_init.h"
+#include "ep_types.h"
+
+
+static PyObject *resfile_load_classmethod(ResFileType *cls, PyObject *args)
+{
+  const char *filename;
+  PyObject *rc = NULL, *args, *kwargs;
+  ResFileObject *presfile;
+  HRESULT hr;
+  HRESFILE handle;
+
+  if (!PyArg_ParseTuple(args, "s", &filename))
+    return NULL;
+  hr = Rsrc_load_file((PCSTR)filename, &handle);
+  if (SUCCEEDED(hr))
+  {
+    args = PyTuple_New(0);
+    if (args)
+    {
+      kwargs = PyDict_New();
+      if (kwargs)
+      {
+        rc = PyType_GenericNew(&ResFileType, args, kwargs);
+        if (rc)
+        {
+          presfile = (ResFileObject *)rc;
+          presfile->hresfile = handle;
+        }
+        Py_DECREF(kwargs);
+      }
+      Py_DECREF(args);
+    }
+
+    if (!rc)
+    {
+      Rsrc_close_file(handle);
+      PyErr_SetString(PyExc_RuntimeError, "unable to create new resource file object");
+    }
+  }
+  else
+    PyErr_Format(PyExc_RuntimeError, "unable to load resource file '%s' (%08x)", filename, hr);
+  return rc;
+}
+
+static PyObject *resfile_close(ResFileObject *self, PyObject *args)
+{
+  if (self->hresfile)
+    Rsrc_close_file(self->hresfile);
+  self->hresfile = (HRESFILE)NULL;
+  return NULL;
+}
+
+static PyObject *resfile_find_resource(ResFileObject *self, PyObject *args)
+{
+  const char *name;
+  PyObject *rc = NULL, *args, *kwargs;
+  ResourceObject *pres;
+  HRSRC hrsrc;
+  HRESULT hr;
+
+  if (!PyArg_ParseTuple(args, "s", &name))
+    return NULL;
+  hr = Rsrc_find_resource(self->hresfile, (PCSTR)name, NULL, &hrsrc);
+  if (SUCCEEDED(hr))
+  {
+    args = PyTuple_New(0);
+    if (args)
+    {
+      kwargs = PyDict_New();
+      if (kwargs)
+      {
+        rc = PyType_GenericNew(&ResourceType, args, kwargs);
+        if (rc)
+        {
+          pres = (ResourceObject *)rc;
+          pres->hrsrc = hrsrc;
+        }
+        Py_DECREF(kwargs);
+      }
+      Py_DECREF(args);
+    }
+
+    if (!rc)
+    {
+      Rsrc_free_resource(hrsrc);
+      PyErr_SetString(PyExc_RuntimeError, "unable to create new resource object");
+    }
+  }
+  else
+    PyErr_Format(PyExc_RuntimeError, "unable to load resource file '%s' (%08x)", filename, hr);
+  return rc;
+}
+
+static PyMethodDef ResFileMethods[] = {
+  {"load", (PyCFunction)resfile_load_classmethod, METH_VARARGS|METH_CLASS,
+   "Load a resource file."},
+  {"close", (PyCFunction)resfile_close, METH_VARARGS,
+   "Close the resource file."},
+  {"find_resource", (PyCFunction)resfile_find_resource, METH_VARARGS,
+   "Find a resource within the resource file."},
+  {NULL, NULL, 0, NULL}
+};
+
+static void resfile_dealloc(ResFileObject *self)
+{
+  if (self->hresfile)
+    Rsrc_close_file(self->hresfile);
+  Py_TYPE(self)->tp_free((PyObject *)self);
+}
+
+static int resfile_init(ResFileObject *self, PyObject *args, PyObject *kwds)
+{
+  self->hresfile = (HRESFILE)NULL;
+  return 0;
+}
+
+PyTypeObject ResFileType = {
+  PyVarObject_HEAD_INIT(NULL, 0)
+  .tp_name = "upiwin.ResFile",
+  .tp_doc = "Resource file object",
+  .tp_basicsize = sizeof(ResFileObject),
+  .tp_itemsize = 0,
+  .tp_flags = Py_TPFLAGS_DEFAULT,
+  .tp_new = PyType_GenericNew,
+  .tp_init = (initproc)resfile_init,
+  .tp_dealloc = (destructor)resfile_dealloc,
+  .tp_methods = ResFileMethods
+};
+
+static PyObject *resource_close(ResourceObject *self, PyObject *args)
+{
+  if (self->hrsrc)
+    Rsrc_free_resource(self->hrsrc);
+  self->hrsrc = (HRESFILE)NULL;
+  return NULL;
+}
+
+static PyMethodDef ResourceMethods[] = {
+  {"close", (PyCFunction)resource_close, METH_VARARGS,
+   "Close and free the resource."},
+  {NULL, NULL, 0, NULL}
+};
+
+static PyObject *resource_get_size(ResourceObject *self, void *closure)
+{
+  if (!(self->hrsrc))
+  {
+    PyErr_SetString(PyExc_RuntimeError, "bad resource object");
+    return NULL;
+  }
+  return PyLong_FromUnsignedLong(Rsrc_sizeof_resource(self->hrsrc));
+}
+
+static PyGetSetDef ResourceProperties[] = {
+  {"size", (getter)resource_get_size, NULL, "Size of the resource in bytes", NULL},
+  {NULL, NULL, NULL, NULL, NULL}
+};
+
+static void resource_dealloc(ResourceObject *self)
+{
+  if (self->hrsrc)
+    Rsrc_free_resource(self->hrsrc);
+  Py_TYPE(self)->tp_free((PyObject *)self);
+}
+
+static int resource_init(ResourceObject *self, PyObject *args, PyObject *kwds)
+{
+  self->hrsrc = (HRSRC)NULL;
+  return 0;
+}
+
+PyTypeObject ResourceType = {
+  PyVarObject_HEAD_INIT(NULL, 0)
+  .tp_name = "upiwin.Resource",
+  .tp_doc = "Resource object",
+  .tp_basicsize = sizeof(ResourceObject),
+  .tp_itemsize = 0,
+  .tp_flags = Py_TPFLAGS_DEFAULT,
+  .tp_new = PyType_GenericNew,
+  .tp_init = (initproc)resource_init,
+  .tp_dealloc = (destructor)resource_dealloc,
+  .tp_methods = ResourceMethods,
+  .tp_getset = ResourceProperties
+};
+
+HRESULT Epython_register_resources(PyObject *module)
+{
+  if (PyType_Ready(&ResFileType) < 0)
+	  return E_FAIL;
+  if (PyType_Ready(&ResourceType) < 0)
+	  return E_FAIL;
+
+  Py_INCREF(&ResFileType);
+  if (PyModule_AddObject(module, "ResFile", (PyObject *)(&ResFileType)) < 0)
+  {
+    Py_DECREF(&ResFileType);
+    return E_FAIL;
+  }
+
+  Py_INCREF(&ResourceType);
+  if (PyModule_AddObject(module, "Resource", (PyObject *)(&ResourceType)) < 0)
+  {
+    Py_DECREF(&ResourceType);
+    return E_FAIL;
+  }
+  return S_OK;
+}

src/ep_types.h

@@ -27,6 +27,7 @@
 #include "gfxobj.h"
 #include "devctxt.h"
 #include "bitmap.h"
+#include "resources.h"
 
 typedef struct tagBitmapObject {
   PyObject_HEAD
@@ -39,8 +40,20 @@ typedef struct tagDevCtxtObject {
   BitmapObject *selected_bitmap;
 } DevCtxtObject;
 
+typedef struct tagResFileObject {
+  PyObject_HEAD
+  HRESFILE hresfile;
+} ResFileObject;
+
+typedef struct tagResourceObject {
+  PyObject_HEAD
+  HRSRC hrsrc;
+} ResourceObject;
+
 extern PyTypeObject DevCtxtType;
 extern PyTypeObject BitmapType;
+extern PyTypeObject ResFileType;
+extern PyTypeObject ResourceType;
 
 extern PyObject *Epython_wrap_bitmap(PBITMAP pbmp);
 

src/ep_upiwin.c

@@ -117,6 +117,12 @@ PyObject *Epython_init_upiwin_module(void)
     return NULL;
   }
 
+  if (FAILED(Epython_register_resources(module)))
+  {
+    Py_DECREF(module);
+    return NULL;
+  }
+
   /* set up the module state */
   pstate = (PUPIWIN_STATE)PyModule_GetState(module);
   pstate->backlight_on = TRUE;