Fix multiline BitmapFont rendering on Windows

doc/news.rst

@@ -82,6 +82,9 @@ Fixed Bugs:
   rendered text by one character in both width and height.
 * :meth:`sdl2.ext.BitmapFont.contains` no longer assumes that the font map
   contains a space.
+* Rendering multiline text with the :class:`sdl2.ext.BitmapFont` class now
+  always splits lines using the newline (`\n`) character. Previously on
+  Windows, it would only split on Windows-style line endings (`\r\n`).
 
 Deprecation Notices:
 

sdl2/ext/bitmapfont.py

@@ -112,7 +112,7 @@ def _validate_chars(self, text):
     def _get_rendered_size(self, text, line_h):
         line_h = self._max_height if not line_h else line_h
         text_w, text_h = (0, 0)
-        lines = text.split(os.linesep)
+        lines = text.split("\n")
         for line in lines:
             line_w = 0
             for c in line:
@@ -173,7 +173,7 @@ def remap(self, c, x, y, w, h):
     def render(self, text, bpp=None):
         # Deprecated: replaced by render_text, which returns a surface
         self._validate_chars(text)
-        lines = text.split(os.linesep)
+        lines = text.split("\n")
 
         tw, th = self._get_rendered_size(text, None)
         if bpp is None:
@@ -198,7 +198,7 @@ def render_text(self, text, line_h=None, as_argb=True):
         set the ``as_argb`` parameter to ``False``.
 
         Args:
-            text (str): The string of text to render to the target surface.
+            text (str): The string of text to render.
             line_h (int, optional): The line height (in pixels) to use for each
                 line of the rendered text. If not specified, the maximum
                 character height for the font will be used. Defaults to ``None``.
@@ -211,7 +211,7 @@ def render_text(self, text, line_h=None, as_argb=True):
 
         """
         self._validate_chars(text)
-        lines = text.split(os.linesep)
+        lines = text.split("\n")
 
         # Create a new surface with the same format as the font image
         tw, th = self._get_rendered_size(text, line_h)
@@ -281,7 +281,7 @@ def contains(self, c):
 
     def can_render(self, text):
         # Deprecated: already throws informative exception on missing character
-        lines = text.split(os.linesep)
+        lines = text.split("\n")
         for line in lines:
             for c in line:
                 if c != ' ' and c not in self.offsets: