Marcio T
4 years ago
committed by
Scott Lahteine
Scott Lahteine
14 changed files with 86 additions and 132 deletions
@ -1,108 +0,0 @@ |
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#!/usr/bin/python |
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# Written By Marcio Teixeira 2019 - Aleph Objects, Inc. |
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# |
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# This program is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# To view a copy of the GNU General Public License, go to the following |
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# location: <https://www.gnu.org/licenses/>. |
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from __future__ import print_function |
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from PIL import Image |
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import argparse |
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import textwrap |
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def pack_rle(data): |
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"""Use run-length encoding to pack the bytes""" |
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rle = [] |
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value = data[0] |
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count = 0 |
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for i in data: |
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if i != value or count == 255: |
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rle.append(count) |
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rle.append(value) |
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value = i |
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count = 1 |
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else: |
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count += 1 |
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rle.append(count) |
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rle.append(value) |
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return rle |
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class WriteSource: |
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def __init__(self, lines_in_blocks): |
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self.blocks = [] |
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self.values = [] |
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self.block_size = lines_in_blocks |
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self.rows = 0 |
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def add_pixel(self, value): |
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self.values.append(value) |
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def convert_to_4bpp(self, data, chunk_size = 0): |
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# Invert the image |
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data = list(map(lambda i: 255 - i, data)) |
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# Quanitize 8-bit values into 4-bits |
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data = list(map(lambda i: i >> 4, data)) |
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# Make sure there is an even number of elements |
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if (len(data) & 1) == 1: |
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data.append(0) |
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# Combine each two adjacent values into one |
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i = iter(data) |
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data = list(map(lambda a, b: a << 4 | b, i ,i)) |
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# Pack the data |
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data = pack_rle(data) |
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# Convert values into hex strings |
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return list(map(lambda a: "0x" + format(a, '02x'), data)) |
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def end_row(self, y): |
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# Pad each row into even number of values |
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if len(self.values) & 1: |
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self.values.append(0) |
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self.rows += 1 |
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if self.block_size and (self.rows % self.block_size) == 0: |
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self.blocks.append(self.values) |
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self.values = [] |
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def write(self): |
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if len(self.values): |
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self.blocks.append(self.values) |
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block_strs = []; |
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for b in self.blocks: |
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data = self.convert_to_4bpp(b) |
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data = ', '.join(data) |
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data = textwrap.fill(data, 75, initial_indent = ' ', subsequent_indent = ' ') |
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block_strs.append(data) |
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print("const unsigned char font[] PROGMEM = {") |
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for i, b in enumerate(block_strs): |
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if i: |
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print(',') |
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print('\n /* {} */'.format(i)) |
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print(b, end='') |
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print("\n};") |
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if __name__ == "__main__": |
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parser = argparse.ArgumentParser(description='Converts a grayscale bitmap into a 16-level RLE packed C array for use as font data') |
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parser.add_argument("input") |
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parser.add_argument('--char_height', help='Adds a separator every so many lines', type=int) |
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args = parser.parse_args() |
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writer = WriteSource(args.char_height) |
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img = Image.open(args.input).convert('L') |
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for y in range(img.height): |
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for x in range(img.width): |
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writer.add_pixel(img.getpixel((x,y))) |
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writer.end_row(y) |
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writer.write() |
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