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Ensure bounds in add_dline()

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