initial commit - basic blocks, generator script, readme
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# uf5x7: A 5x7 Unicode font
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uf5x7 is a 5x7 font that suports most of the common Unicode blocks. It can be
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used in C.Basic with the custom font mechanism or in add-ins if the font
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manager supports it.
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![Preview image: "Mézalors Δ=2 ⇒ ∀x∈S, x⊆Δ"](https://www.planet-casio.com/files/forums/preview-166451.png)
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Currently the following blocks have been drawn:
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* `U+0020 .. U+007F` - ASCII (128 chars)
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* `U+00A0 .. U+00FF` - Latin-1 Supplement (96 chars)
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* `U+0100 .. U+017F` - Latin Extended-A (128 chars)
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* `U+0370 .. U+03FF` - Greek (144 chars)
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* `U+0400 .. U+047F` - Cyrillic (128 chars)
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* `U+2010 .. U+205F` - General punctuation (80 chars)
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* `U+2070 .. U+209F` - Subscripts and superscripts (48 chars)
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* `U+2160 .. U+217F` - Roman numerals (32 chars)
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* `U+2190 .. U+21FF` - Arrows (112 chars)
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* `U+2200 .. U+22FF` - Mathematical operators (256 chars)
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* `U+25A0 .. U+25FF` - Geometric shapes (96 chars)
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* `U+2800 .. U+28FF` - Braille patterns (256 chars - thanks @Alice!)
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The following blocks are being considered for future support:
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* Finish Cyrillic
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* IPA extensions and Phonetic extensions
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* Currency symbols
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* Hiragana and Katakana
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Other characters supported in `FONTCHARACTER` (incomplete list):
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* `U+2139` - Imaginary number
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* `U+231F` - Fraction symbol
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* `U+3010` - Special bracket
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* `U+3011` - Special bracket
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## Constructing a full image of the font
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The `gen.py` script can be used to generate `uf5x7.png`, the full image of the
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font. You will need Python 3 and Pillow (PIL might be okay).
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```sh
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% ./gen.py blocks/*
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```
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It will read each block's position from its file name (which should be on the
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form `U\+[0-9A-Fa-f]{4}.png`) and guess the block end from the image
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dimensions. For image files with a different name, it will output an anonymous
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block.
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The file `gen-chars.png` provides some character templates for it to render the
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full image.
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## Using in C.Basic
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TODO - Check out the [documentation](https://egadget2.web.fc2.com/CBasic/Interpreter/CBasic_interpreter.html) (egadget2.web.fc2.com)
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for extended font support.
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## Using in gint
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**Disclaimer**: this is being worked on, but not implemented in gint yet.
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When converting the font with `fxconv`, pass the name of a folder containing
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block images instead of a simple image and set `charset` to `unicode`.
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```sh
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% fxconv -f uf5x7/ name:uf5x7 charset:unicode grid.size:5x7
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```
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When using the font, just call `dtext()` as usual and make sure the string is
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encoded as utf8. The `u8` prefix can be used if your source file is not
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encoded as utf8.
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```c
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dtext(5, 5, "Mézalors Δ=2 ⇒ ∀x∈S, x⊆Δ", BLACK, WHITE);
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```
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After Width: | Height: | Size: 274 B |
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#! /usr/bin/python3
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import PIL.Image
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import sys
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import os
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import re
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if len(sys.argv) <= 1:
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print(f"usage: {sys.argv[0]} <block files...>")
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sys.exit(1)
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files = sorted(sys.argv[1:])
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chars = PIL.Image.open("gen-chars.png")
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WHITE = (255, 255, 255)
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BLACK = (0, 0, 0)
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def empty_separator():
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img = PIL.Image.new("RGB", (112, 9), color=WHITE)
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for j in range(3, 6):
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for i in range(1, 111):
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if not ((i + j) & 1):
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img.putpixel((i, j), BLACK)
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return img
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def char_index(c):
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o = ord(c)
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if ord('0') <= o <= ord('9'):
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return o - ord('0')
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if ord('A') <= o <= ord('F'):
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return o - ord('A') + 10
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if c == 'U':
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return 16
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if c == '+':
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return 17
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raise Exception(f"Unsupported char '{c}'")
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def char_image(c):
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index = 4 * char_index(c)
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return chars.crop((index, 0, index + 3, 5))
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def separator(start, end):
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img = PIL.Image.new("RGB", (112, 9), color=WHITE)
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for j in range(3, 6):
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for i in range(1, 26):
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if not ((i + j) & 1):
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img.putpixel((i, j), BLACK)
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for i in range(86, 111):
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if not ((i + j) & 1):
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img.putpixel((i, j), BLACK)
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x = 27
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for c in "U+{:04X}".format(start):
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img.paste(char_image(c), (x, 2))
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x += 4
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for i in range(54, 58):
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img.putpixel((i, 4), BLACK)
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x = 62
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for c in "U+{:04X}".format(end):
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img.paste(char_image(c), (x, 2))
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x += 4
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return img
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class Block:
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def __init__(self, path):
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basename = os.path.basename(path)
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match = re.search(r'U\+([0-9A-Za-z]{4})', basename)
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self.block_start = None
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self.block_end = None
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self.img = PIL.Image.open(path)
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if match is not None:
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self.block_start = int(match[1], 16)
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self.block_end = self.block_start + 16 * (self.img.height // 9) - 1
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print('{} U+{:04X} - U+{:04X}'.format(basename, self.block_start,
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self.block_end))
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else:
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print(f'{basename} not a block')
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def header(self):
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if self.block_start is not None:
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return separator(self.block_start, self.block_end)
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else:
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return empty_separator()
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def body(self):
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return self.img
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def height(self):
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return self.img.height + 9
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blocks = [ Block(file) for file in files ]
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height = sum(b.height() for b in blocks)
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result = PIL.Image.new("RGB", (112, height))
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y = 0
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for b in blocks:
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header = b.header()
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result.paste(header, (0, y))
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y += header.height
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body = b.body()
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result.paste(body, (0, y))
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y += body.height
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result.save("uf5x7.png")
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