def calc_fonts():
"""
Iterate through all the Latin "1 & 5" fonts, and use ANSI escape sequences to see how many rows/columns
the EV3 LCD console can accommodate for each font
"""
console = Console()
files = [
f for f in listdir("/usr/share/consolefonts/")
if f.startswith("Lat15") and f.endswith(".psf.gz")
]
files.sort()
for font in files:
console.set_font(font, True)
# position cursor at 50, 50, and ask the console to report its actual cursor position
console.text_at("\x1b[6n", 50, 50, False)
console.text_at(font, 1, 1, False, True)
console.clear_to_eol()
# now, read the console response of the actual cursor position, in the form of esc[rr;ccR
# requires pressing the center button on the EV3 for each read
dims = ''
while True:
ch = stdin.read(1)
if ch == '\x1b' or ch == '[' or ch == '\r' or ch == '\n':
continue
if ch == 'R':
break
dims += str(ch)
(rows, cols) = dims.split(";")
print("({}, {}, \"{}\"),".format(rows, cols, font), file=stderr)
sleep(.5)
def show_fonts():
"""
Iterate over the known Latin "1 & 5" fonts and display each on the EV3 LCD console.
Note: `Terminus` fonts are "thinner"; `TerminusBold` and `VGA` offer more contrast on the LCD console
and are thus more readable; the `TomThumb` font is waaaaay too small to read!
"""
# Create a list of tuples with calulated rows, columns, font filename
fonts = [
(4, 11, "Lat15-Terminus32x16.psf.gz"),
(4, 11, "Lat15-TerminusBold32x16.psf.gz"),
(4, 11, "Lat15-VGA28x16.psf.gz"), (4, 11, "Lat15-VGA32x16.psf.gz"),
(4, 12, "Lat15-Terminus28x14.psf.gz"),
(4, 12, "Lat15-TerminusBold28x14.psf.gz"),
(5, 14, "Lat15-Terminus24x12.psf.gz"),
(5, 14, "Lat15-TerminusBold24x12.psf.gz"),
(5, 16, "Lat15-Terminus22x11.psf.gz"),
(5, 16, "Lat15-TerminusBold22x11.psf.gz"),
(6, 17, "Lat15-Terminus20x10.psf.gz"),
(6, 17, "Lat15-TerminusBold20x10.psf.gz"),
(7, 22, "Lat15-Fixed18.psf.gz"), (8, 22, "Lat15-Fixed15.psf.gz"),
(8, 22, "Lat15-Fixed16.psf.gz"), (8, 22, "Lat15-Terminus16.psf.gz"),
(8, 22, "Lat15-TerminusBold16.psf.gz"),
(8, 22, "Lat15-TerminusBoldVGA16.psf.gz"),
(8, 22, "Lat15-VGA16.psf.gz"), (9, 22, "Lat15-Fixed13.psf.gz"),
(9, 22, "Lat15-Fixed14.psf.gz"), (9, 22, "Lat15-Terminus14.psf.gz"),
(9, 22, "Lat15-TerminusBold14.psf.gz"),
(9, 22, "Lat15-TerminusBoldVGA14.psf.gz"),
(9, 22, "Lat15-VGA14.psf.gz"), (10, 29, "Lat15-Terminus12x6.psf.gz"),
(16, 22, "Lat15-VGA8.psf.gz"), (21, 44, "Lat15-TomThumb4x6.psf.gz")
]
# Paint the screen full of numbers that represent the column number, reversing the even rows
console = Console()
for rows, cols, font in fonts:
print(rows, cols, font, file=stderr)
console.set_font(font, True)
for row in range(1, rows + 1):
for col in range(1, cols + 1):
console.text_at("{}".format(col % 10), col, row, False,
(row % 2 == 0))
console.text_at(font.split(".")[0], 1, 1, False, True)
console.clear_to_eol()
sleep(.5)
def show_fonts():
"""
Iterate through all the Latin "1 & 5" fonts, and see how many rows/columns
the EV3 LCD console can accommodate for each font.
Note: ``Terminus`` fonts are "thinner"; ``TerminusBold`` and ``VGA`` offer more contrast on the LCD console
and are thus more readable; the ``TomThumb`` font is waaaaay too small to read!
"""
console = Console()
files = [
f for f in listdir("/usr/share/consolefonts/")
if f.startswith("Lat15") and f.endswith(".psf.gz")
]
files.sort()
fonts = []
for font in files:
console.set_font(font, True)
console.text_at(font, 1, 1, False, True)
console.clear_to_eol()
console.text_at("{}, {}".format(console.columns, console.rows),
column=2,
row=4,
reset_console=False,
inverse=False)
print("{}, {}, \"{}\"".format(console.columns, console.rows, font),
file=stderr)
fonts.append((console.columns, console.rows, font))
fonts.sort(key=lambda f: (f[0], f[1], f[2]))
# Paint the screen full of numbers that represent the column number, reversing the even rows
for cols, rows, font in fonts:
print(cols, rows, font, file=stderr)
console.set_font(font, True)
for row in range(1, rows + 1):
for col in range(1, cols + 1):
console.text_at("{}".format(col % 10), col, row, False,
(row % 2 == 0))
console.text_at(font.split(".")[0], 1, 1, False, True)
console.clear_to_eol()