Created
May 1, 2025 16:07
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| from PIL import Image | |
| import struct | |
| import os | |
| import re | |
| def gb2312_offset(char, size): | |
| gb = char.encode('gb2312') | |
| area = gb[0] - 0xA1 | |
| index = gb[1] - 0xA1 | |
| bytes_per_char = size * size // 8 | |
| return (94 * area + index) * bytes_per_char | |
| def read_bitmap(char, font_path, size): | |
| bytes_per_char = size * size // 8 | |
| offset = gb2312_offset(char, size) | |
| file_size = os.path.getsize(font_path) | |
| if offset + bytes_per_char > file_size: | |
| raise ValueError("Offset out of bounds") | |
| with open(font_path, 'rb') as f: | |
| f.seek(offset) | |
| data = f.read(bytes_per_char) | |
| if not any(data): | |
| raise ValueError("Bitmap is all zeros") | |
| return data | |
| def bitmap_to_pil(bitmap_bytes, size): | |
| img = Image.new('1', (size, size), 0) | |
| pixels = img.load() | |
| row_bytes = size // 8 | |
| for y in range(size): | |
| for x in range(size): | |
| byte_index = y * row_bytes + x // 8 | |
| if byte_index >= len(bitmap_bytes): | |
| continue | |
| byte = bitmap_bytes[byte_index] | |
| if byte & (1 << (7 - (x % 8))): | |
| pixels[x, y] = 1 | |
| return img | |
| def concat_pil_images_horizontally(images): | |
| widths, heights = zip(*(i.size for i in images)) | |
| total_width = sum(widths) | |
| max_height = max(heights) | |
| new_image = Image.new('RGB', (total_width, max_height)) | |
| x_offset = 0 | |
| for img in images: | |
| new_image.paste(img.convert('RGB'), (x_offset, 0)) | |
| x_offset += img.width | |
| return new_image | |
| def infer_size_from_filename(name): | |
| m = re.search(r'(\d+)', name) | |
| return int(m.group(1)) if m else 16 | |
| scale = 5 | |
| font_dir = 'BitmapFont/font' | |
| fonts = sorted(os.listdir(font_dir)) | |
| for char in '他是一个老师': | |
| font_samples = [] | |
| for fontname in fonts: | |
| path = os.path.join(font_dir, fontname) | |
| try: | |
| size = infer_size_from_filename(fontname.upper()) | |
| print(size) | |
| bitmap = read_bitmap(char, path, size) | |
| img = bitmap_to_pil(bitmap, size) | |
| img = img.resize((size*scale, size*scale), resample=Image.NEAREST) | |
| font_samples.append(img) | |
| except Exception as e: | |
| print(f"Skipping {fontname}: {e}") | |
| img_row = concat_pil_images_horizontally(font_samples) | |
| display(img_row) |
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