Ensure bounds in add_dline()

2017-12-13 13:45:11 +05:30 · 2017-12-13 13:45:11 +05:30 · 54b802f1e6
commit 54b802f1e6
parent d097403a12
1 changed files with 2 additions and 0 deletions
--- a/kitty/fonts/render.py
+++ b/kitty/fonts/render.py
@ -93,6 +93,8 @@ def add_dline(buf, cell_width, position, thickness, cell_height):
                top -= deficit - 1
        else:
            top -= deficit
+    top = max(0, min(top, cell_height - 1))
+    bottom = max(0, min(bottom, cell_height - 1))
    for y in {top, bottom}:
        ctypes.memset(ctypes.addressof(buf) + (cell_width * y), 255, cell_width)