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Change undercurl escape code to 4:x

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See https://github.com/neovim/neovim/issues/7479
for discussion. Also implement double underline.
This commit is contained in:
Kovid Goyal
2017-12-04 12:26:50 +05:30
parent 27cd303a05
commit e81ba3b207
5 changed files with 26 additions and 19 deletions
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20
kitty/fonts/render.py
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@@ -74,12 +74,17 @@ def add_line(buf, cell_width, position, thickness, cell_height):
y = position - thickness // 2
while thickness:
thickness -= 1
offset = cell_width * y
for x in range(cell_width):
buf[offset + x] = 255
ctypes.memset(ctypes.addressof(buf) + (cell_width * y), 255, cell_width)
y += 1
def add_dline(buf, cell_width, position, thickness, cell_height):
bottom = min(position - thickness, cell_height - 1)
top = min(position, cell_height - 1)
for y in {top, bottom}:
ctypes.memset(ctypes.addressof(buf) + (cell_width * y), 255, cell_width)
def add_curl(buf, cell_width, position, thickness, cell_height):
xfactor = 2.0 * pi / cell_width
yfactor = thickness
@@ -119,12 +124,9 @@ def render_special(underline=0, strikethrough=False, missing=False):
if underline:
t = underline_thickness
if underline == 2:
if underline > 1:
t = max(1, min(cell_height - underline_position - 1, t))
dl(
add_curl
if underline == 2 else add_line, underline_position, t, cell_height
)
dl([None, add_line, add_dline, add_curl][underline], underline_position, t, cell_height)
if strikethrough:
pos = int(0.65 * baseline)
dl(add_line, pos, underline_thickness, cell_height)
@@ -138,7 +140,7 @@ def render_special(underline=0, strikethrough=False, missing=False):
def prerender():
# Pre-render the special blank, underline and strikethrough cells
cells = render_special(1), render_special(2), render_special(0, True), render_special(missing=True)
cells = render_special(1), render_special(2), render_special(3), render_special(0, True), render_special(missing=True)
if send_prerendered_sprites(*map(ctypes.addressof, cells)) != len(cells):
raise RuntimeError('Your GPU has too small a max texture size')