Fix #26555: SVG Import (stars wrong scale)

Transformation for non-container objects was applied twice when they were USEd.
Get rid of confusing checks for special cases in USE.createGeom and use special
flag (instancing) which tells geometry is it "normal" geometry creation or
geometry creation initiated by USE node (SYMBOL would be handled differently
int this two cases)

Quick tests showed none regressions.

io_curve_svg/import_svg.py

@@ -1022,7 +1022,7 @@ class SVGGeometry:
 
         pass
 
-    def _doCreateGeom(self):
+    def _doCreateGeom(self, instancing):
         """
         Internal handler to create real geometries
         """
@@ -1041,7 +1041,7 @@ class SVGGeometry:
 
         return None
 
-    def createGeom(self):
+    def createGeom(self, instancing):
         """
         Create real geometries
         """
@@ -1055,7 +1055,7 @@ class SVGGeometry:
         if matrix is not None:
             self._pushMatrix(matrix)
 
-        self._doCreateGeom()
+        self._doCreateGeom(instancing)
 
         if matrix is not None:
             self._popMatrix()
@@ -1092,13 +1092,13 @@ class SVGGeometryContainer(SVGGeometry):
             if ob is not None:
                 self._geometries.append(ob)
 
-    def _doCreateGeom(self):
+    def _doCreateGeom(self, instancing):
         """
         Create real geometries
         """
 
         for geom in self._geometries:
-            geom.createGeom()
+            geom.createGeom(instancing)
 
     def getGeometries(self):
         """
@@ -1139,7 +1139,7 @@ class SVGGeometryPATH(SVGGeometry):
         self._splines = pathParser.getSplines()
         self._styles = SVGParseStyles(self._node, self._context)
 
-    def _doCreateGeom(self):
+    def _doCreateGeom(self, instancing):
         """
         Create real geometries
         """
@@ -1190,7 +1190,7 @@ class SVGGeometryDEFS(SVGGeometryContainer):
     Container for referenced elements
     """
 
-    def _doCreateGeom(self):
+    def createGeom(self, instancing):
         """
         Create real geometries
         """
@@ -1203,12 +1203,26 @@ class SVGGeometrySYMBOL(SVGGeometryContainer):
     Referenced element
     """
 
-    def _doCreateGeom(self):
+    def _doCreateGeom(self, instancing):
         """
         Create real geometries
         """
 
-        pass
+        self._pushMatrix(self.getNodeMatrix())
+
+        super()._doCreateGeom(False)
+
+        self._popMatrix()
+
+    def createGeom(self, instancing):
+        """
+        Create real geometries
+        """
+
+        if not instancing:
+            return
+
+        super().createGeom(instancing)
 
 
 class SVGGeometryG(SVGGeometryContainer):
@@ -1224,7 +1238,7 @@ class SVGGeometryUSE(SVGGeometry):
     User of referenced elements
     """
 
-    def _doCreateGeom(self):
+    def _doCreateGeom(self, instancing):
         """
         Create real geometries
         """
@@ -1239,34 +1253,7 @@ class SVGGeometryUSE(SVGGeometry):
 
             self._pushMatrix(self.getNodeMatrix())
 
-            geomMatrix = None
-            nodeMatrix = None
-
-            if not isinstance(geom, SVGGeometryUSE):
-                geomMatrix = geom.getTransformMatrix()
-
-            if isinstance(geom, SVGGeometrySYMBOL):
-                nodeMatrix = geom.getNodeMatrix()
-
-            if nodeMatrix:
-                self._pushMatrix(nodeMatrix)
-
-            if geomMatrix:
-                self._pushMatrix(geomMatrix)
-
-            if isinstance(geom, SVGGeometryContainer):
-                geometries = geom.getGeometries()
-            else:
-                geometries = [geom]
-
-            for g in geometries:
-                g.createGeom()
-
-            if geomMatrix:
-                self._popMatrix()
-
-            if nodeMatrix:
-                self._popMatrix()
+            geom.createGeom(True)
 
             self._popMatrix()
 
@@ -1345,7 +1332,7 @@ class SVGGeometryRECT(SVGGeometry):
             bezt.handle_left_type = 'VECTOR'
             bezt.handle_right_type = 'VECTOR'
 
-    def _doCreateGeom(self):
+    def _doCreateGeom(self, instancing):
         """
         Create real geometries
         """
@@ -1467,7 +1454,7 @@ class SVGGeometryELLIPSE(SVGGeometry):
         self._rx = self._node.getAttribute('rx') or '0'
         self._ry = self._node.getAttribute('ry') or '0'
 
-    def _doCreateGeom(self):
+    def _doCreateGeom(self, instancing):
         """
         Create real geometries
         """
@@ -1585,7 +1572,7 @@ class SVGGeometryLINE(SVGGeometry):
         self._x2 = self._node.getAttribute('x2') or '0'
         self._y2 = self._node.getAttribute('y2') or '0'
 
-    def _doCreateGeom(self):
+    def _doCreateGeom(self, instancing):
         """
         Create real geometries
         """
@@ -1666,7 +1653,7 @@ class SVGGeometryPOLY(SVGGeometry):
                 self._points.append((float(prev), float(p)))
                 prev = None
 
-    def _doCreateGeom(self):
+    def _doCreateGeom(self, instancing):
         """
         Create real geometries
         """
@@ -1728,7 +1715,7 @@ class SVGGeometrySVG(SVGGeometryContainer):
     Main geometry holder
     """
 
-    def _doCreateGeom(self):
+    def _doCreateGeom(self, instancing):
         """
         Create real geometries
         """
@@ -1738,7 +1725,7 @@ class SVGGeometrySVG(SVGGeometryContainer):
         self._pushMatrix(self.getNodeMatrix())
         self._pushRect(rect)
 
-        super()._doCreateGeom()
+        super()._doCreateGeom(False)
 
         self._popRect()
         self._popMatrix()
@@ -1824,7 +1811,7 @@ def load_svg(filepath):
 
     loader = SVGLoader(filepath)
     loader.parse()
-    loader.createGeom()
+    loader.createGeom(False)
 
 
 def load(operator, context, filepath=""):