proverbs.py

../_images/proverbs.png

Test for TrueType write_font_converter.

Displays what I hope are chinese proverbs in simplified chinese to test UTF-8 font support. The fonts were converted from True Type fonts using the write_font_converter.py utility.

#!/bin/sh

SIZE=20
../../utils/write_font_converter.py \
    -s "万事起头难。熟能生巧。冰冻三尺，非一日之寒。三个臭皮匠，胜过诸葛亮。今日事，今日毕。师父领进门，修行在个人。一口吃不成胖子。欲速则不达。百闻不如一见。不入虎穴，焉得虎子。" \
	NotoSansSC-Regular.otf ${SIZE} >proverbs_${SIZE}.py

mpy-cross proverbs_${SIZE}.py
mpremote cp proverbs_${SIZE}.mpy :

Note

This example requires the following modules:

  • gc9a01

  • tft_config

  • proverbs_20

 1"""
 2proverbs.py
 3===========
 4
 5.. figure:: /_static/proverbs.png
 6    :align: center
 7
 8    Test for TrueType write_font_converter.
 9
10Displays what I hope are chinese proverbs in simplified chinese to test UTF-8 font support.
11The fonts were converted from True Type fonts using the
12:ref:`write_font_converter.py<write_font_converter>` utility.
13
14.. literalinclude:: ../../examples/proverbs/make_proverbs_fonts.sh
15
16
17.. note:: This example requires the following modules:
18
19  .. hlist::
20    :columns: 3
21
22    - `gc9a01`
23    - `tft_config`
24    - `proverbs_20`
25
26"""
27
28import utime
29import gc9a01
30import tft_config
31import proverbs_20 as font
32
33
34def color_wheel(WheelPos):
35    """returns a 565 color from the given position of the color wheel"""
36    WheelPos = (255 - WheelPos) % 255
37
38    if WheelPos < 85:
39        return gc9a01.color565(255 - WheelPos * 3, 0, WheelPos * 3)
40
41    if WheelPos < 170:
42        WheelPos -= 85
43        return gc9a01.color565(0, WheelPos * 3, 255 - WheelPos * 3)
44
45    WheelPos -= 170
46    return gc9a01.color565(WheelPos * 3, 255 - WheelPos * 3, 0)
47
48
49def main():
50    proverbs = [
51        "万事起头难",
52        "熟能生巧",
53        "冰冻三尺 非一日之寒",
54        "三个臭皮匠 胜过诸葛亮",
55        "今日事 今日毕",
56        "师父领进门 修行在个人",
57        "一口吃不成胖子",
58        "欲速则不达",
59        "百闻不如一见",
60        "不入虎穴 焉得虎子",
61    ]
62
63    tft = tft_config.config(tft_config.WIDE)
64    tft.init()
65
66    line_height = font.HEIGHT + 8
67    half_height = tft.height() // 2
68    half_width = tft.width() // 2
69    wheel = 0
70
71    while True:
72        for proverb in proverbs:
73            proverb_lines = proverb.split(" ")
74            half_lines_height = len(proverb_lines) * line_height // 2
75            tft.fill(gc9a01.BLACK)
76
77            for count, proverb_line in enumerate(proverb_lines):
78                half_length = tft.write_len(font, proverb_line) // 2
79                tft.write(
80                    font,
81                    proverb_line,
82                    half_width - half_length,
83                    half_height - half_lines_height + count * line_height,
84                    color_wheel(wheel),
85                )
86
87            wheel = (wheel + 5) % 256
88            # pause to slow down scrolling
89            utime.sleep(5)
90
91
92main()