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Fix undercurl height & thickness on HiDPI screens

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Update positioning
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disrupted 2021-05-17 21:46:58 +02:00
parent 02fb020dfd
commit d650a97dda
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GPG Key ID: A299EE8F816BBFA4
1 changed files with 12 additions and 9 deletions
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21
kitty/fonts/render.py
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@ -236,7 +236,8 @@ def add_dline(buf: ctypes.Array, cell_width: int, position: int, thickness: int,
def add_curl(buf: ctypes.Array, cell_width: int, position: int, thickness: int, cell_height: int) -> None:
max_x, max_y = cell_width - 1, cell_height - 1
xfactor = 2.0 * pi / max_x
half_height = max(thickness // 2, 1)
half_height = thickness
thickness -= 1
def add_intensity(x: int, y: int, val: int) -> None:
y += position
@ -244,20 +245,22 @@ def add_curl(buf: ctypes.Array, cell_width: int, position: int, thickness: int,
idx = cell_width * y + x
buf[idx] = min(255, buf[idx] + val)
# Ensure all space at bottom of cell is used
if position + half_height < max_y:
position += max_y - (position + half_height)
# Ensure curve doesn't exceed cell boundary at the bottom
position += half_height * 2
if position + half_height > max_y:
position -= position + half_height - max_y
position = max_y - half_height
# Use the Wu antialias algorithm to draw the curve
# cosine waves always have slope <= 1 so are never steep
for x in range(cell_width):
y = half_height * cos(x * xfactor)
y1, y2 = floor(y), ceil(y)
i1 = int(255 * abs(y - y1))
add_intensity(x, y1, 255 - i1)
add_intensity(x, y2, i1)
y1, y2 = floor(y - thickness), ceil(y)
i1 = int(255 * abs(y - floor(y)))
add_intensity(x, y1, 255 - i1) # upper bound
add_intensity(x, y2, i1) # lower bound
# fill between upper and lower bound
for t in range(1, thickness + 1):
add_intensity(x, y1 + t, 255)
def render_special(