very dirty bugfix (JsonBasedSprSheet cls) but hey, its a prototype

src/pyved_engine/compo/gfx.py

@@ -10,43 +10,70 @@
 
 class JsonBasedSprSheet:
     def __init__(self, filename_noext_nopath, pathinfo=None, ck=None):
+        """
+        warning:
+        the current source-code looks stupid, but it has written that way in order to
+        avoid several bugs that exist in the pyVM component.
+        (scaling images, and use .subsurface on these images for cutting sub images)
+        As long as the pyVM has not bee toroughly debugged and tested,
+        I recommend not modifying the following code /!\ unless you want to take risks
+        """
 
+        print('create SpriteSheet based on json:', filename_noext_nopath)
         p = pathinfo if pathinfo else ''
         self.sheet_surf = _hub.pygame.image.load(f'{p}{filename_noext_nopath}.png')
         json_def_file = open(f'{p}{filename_noext_nopath}.json', 'r')
         jsondata = json.load(json_def_file)
-        chosen_scale = "1.0"
+
+        chosen_scale = "1"
         meta = jsondata.get("meta", "")
         if meta:
             chosen_scale = meta.get("scale", chosen_scale)
-
+            print('[JsonBasedSprSheet] image scale after reading meta field:', chosen_scale)
+        else:
+            print('[JsonBasedSprSheet] no meta field has been found in the json file')
+
         try:
             chosen_scale_f = float(chosen_scale)
-        except:
+        except ValueError:
+            e_msg = f"[JsonBasedSprSheet:] WARNING! Cannot convert scale '{chosen_scale}' to float, using default val."
+            print(e_msg)
             chosen_scale_f = 1.0
-            print(f"Error in JsonBasedSprSheet: can't convert scale '{chosen_scale}' to float. Using scale of 1.")
-
-        if chosen_scale_f != 1.0:
-            homo = _hub.pygame.transform.scale
-            w, h = self.sheet_surf.get_size()
-            self.sheet_surf = homo(self.sheet_surf, (chosen_scale_f * w, chosen_scale_f * h))
 
+        #if chosen_scale_f != 1.0:
+        #    w, h = self.sheet_surf.get_size()
+        #    self.sheet_surf = _hub.pygame.transform.scale(
+        #        self.sheet_surf, (chosen_scale_f * w, chosen_scale_f * h)
+        #    )
         if ck:
             self.sheet_surf.set_colorkey(ck)
 
         assoc_tmp = dict()
         self.all_names = set()
+        y = chosen_scale_f
+        chosen_scale_f = 1.0
         if isinstance(jsondata['frames'], list):  # we support 2 formats of json desc
             for infos in jsondata['frames']:
                 gname = infos['filename']
                 self.all_names.add(gname)
-                args = (infos['frame']['x'] * chosen_scale_f, infos['frame']['y'] * chosen_scale_f, infos['frame']['w'] * chosen_scale_f, infos['frame']['h'] * chosen_scale_f)
-                assoc_tmp[gname] = self.sheet_surf.subsurface(_hub.pygame.Rect(*args)).copy()
+                args = (infos['frame']['x'] * chosen_scale_f, infos['frame']['y'] * chosen_scale_f,
+                        infos['frame']['w'] * chosen_scale_f, infos['frame']['h'] * chosen_scale_f)
+                tempp = self.sheet_surf.subsurface(_hub.pygame.Rect(*args)).copy()
+                lw, lh = tempp.get_size()
+                assoc_tmp[gname] = _hub.pygame.transform.scale(
+                    tempp, (y*lw, y*lh)
+                )
         else:
             for sprname, infos in jsondata['frames'].items():
                 self.all_names.add(sprname)
-                args = (infos['frame']['x'] * chosen_scale_f, infos['frame']['y'] * chosen_scale_f, infos['frame']['w'] * chosen_scale_f, infos['frame']['h'] * chosen_scale_f)
-                assoc_tmp[sprname] = self.sheet_surf.subsurface(_hub.pygame.Rect(*args)).copy()
+                args = (infos['frame']['x'] * chosen_scale_f, infos['frame']['y'] * chosen_scale_f,
+                        infos['frame']['w'] * chosen_scale_f, infos['frame']['h'] * chosen_scale_f)
+                tempp = self.sheet_surf.subsurface(_hub.pygame.Rect(*args)).copy()
+                lw, lh = tempp.get_size()
+                assoc_tmp[sprname] = _hub.pygame.transform.scale(
+                    tempp, (y*lw, y*lh)
+                )
+
         self.assoc_name_spr = assoc_tmp
 
     def __getitem__(self, item):