simplify decompression bomb check in FreeTypeFont.render

Author: nulano

src/PIL/ImageFont.py

@@ -582,22 +582,13 @@ def getmask2(
         _string_length_check(text)
         if start is None:
             start = (0, 0)
-        im = None
-        size = None
 
         def fill(width, height):
-            nonlocal im, size
-
             size = (width, height)
-            if Image.MAX_IMAGE_PIXELS is not None:
-                pixels = max(1, width) * max(1, height)
-                if pixels > 2 * Image.MAX_IMAGE_PIXELS:
-                    return
-
-            im = Image.core.fill("RGBA" if mode == "RGBA" else "L", size)
-            return im
+            Image._decompression_bomb_check(size)
+            return Image.core.fill("RGBA" if mode == "RGBA" else "L", size)
 
-        offset = self.font.render(
+        return self.font.render(
             text,
             fill,
             mode,
@@ -610,8 +601,6 @@ def fill(width, height):
             start[0],
             start[1],
         )
-        Image._decompression_bomb_check(size)
-        return im, offset
 
     def font_variant(
         self, font=None, size=None, index=None, encoding=None, layout_engine=None

src/_imagingft.c

@@ -880,7 +880,7 @@ font_render(FontObject *self, PyObject *args) {
     image = PyObject_CallFunction(fill, "ii", width, height);
     if (image == Py_None) {
         PyMem_Del(glyph_info);
-        return Py_BuildValue("ii", 0, 0);
+        return Py_BuildValue("N(ii)", image, 0, 0);
     } else if (image == NULL) {
         PyMem_Del(glyph_info);
         return NULL;
@@ -894,7 +894,7 @@ font_render(FontObject *self, PyObject *args) {
     y_offset -= stroke_width;
     if (count == 0 || width == 0 || height == 0) {
         PyMem_Del(glyph_info);
-        return Py_BuildValue("ii", x_offset, y_offset);
+        return Py_BuildValue("N(ii)", image, x_offset, y_offset);
     }
 
     if (stroke_width) {
@@ -1130,18 +1130,12 @@ font_render(FontObject *self, PyObject *args) {
     if (bitmap_converted_ready) {
         FT_Bitmap_Done(library, &bitmap_converted);
     }
-    Py_DECREF(image);
     FT_Stroker_Done(stroker);
     PyMem_Del(glyph_info);
-    return Py_BuildValue("ii", x_offset, y_offset);
+    return Py_BuildValue("N(ii)", image, x_offset, y_offset);
 
 glyph_error:
-    if (im->destroy) {
-        im->destroy(im);
-    }
-    if (im->image) {
-        free(im->image);
-    }
+    Py_DECREF(image);
     if (stroker != NULL) {
         FT_Done_Glyph(glyph);
     }