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Ensure bounds in add_line()

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Kovid Goyal
2017-12-13 13:46:28 +05:30
parent 54b802f1e6
commit da0309545e
1 changed files with 1 additions and 1 deletions
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kitty/fonts/render.py
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@@ -73,7 +73,7 @@ def resize_fonts(new_sz):
def add_line(buf, cell_width, position, thickness, cell_height): def add_line(buf, cell_width, position, thickness, cell_height):
y = position - thickness // 2 y = position - thickness // 2
while thickness: while thickness > 0 and y > -1 and y < cell_height - 1:
thickness -= 1 thickness -= 1
ctypes.memset(ctypes.addressof(buf) + (cell_width * y), 255, cell_width) ctypes.memset(ctypes.addressof(buf) + (cell_width * y), 255, cell_width)
y += 1 y += 1