klemek
123 lines
5.1 KiB
Python
123 lines
5.1 KiB
Python
from typing import List, Optional, Tuple
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from PIL import Image, ImageFont, ImageDraw
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import os
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import os.path as path
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import logging
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from . import utils
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from .types import Text
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FONT_DIR = utils.relative_path(__file__, "..", "fonts")
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TEMPLATES_DIR = utils.relative_path(__file__, "..", "templates")
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FONTS = {}
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logger = logging.getLogger("img_factory")
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def load_fonts():
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for file in [f for f in os.listdir(FONT_DIR) if path.isfile(path.join(FONT_DIR, f))]:
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split = path.splitext(file)
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if split[-1] == ".ttf":
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try:
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FONTS[split[0]] = ImageFont.truetype(path.join(FONT_DIR, file))
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logger.info(f"Loaded font '{split[0]}'")
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except OSError:
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logger.error(f"Could not load font '{split[0]}'")
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def build_image(template: str, texts: List[Text], debug: bool = False) -> Optional[Image.Image]:
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try:
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img = Image.open(path.join(TEMPLATES_DIR, template)).convert(mode='RGBA')
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except OSError as e:
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logger.error(f"Could not read template file '{template}': {e}")
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return None
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draw = ImageDraw.Draw(img)
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for text in texts:
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draw_text(draw, img, text, debug=debug)
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return img.convert(mode='RGB')
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def draw_text(draw: ImageDraw.ImageDraw, img: Image.Image, text: Text, debug: bool = False):
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if text.text is not None and len(text.text.strip()) > 0:
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text.init() # load default values
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if text.font in FONTS:
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text.text, font = fit_text(img.size, text)
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if text.angle == 0:
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draw.text(get_text_pos(img.size, text, font), text.text, fill=text.fill, align=text.align, font=font,
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stroke_width=round(text.stroke_width * font.size), stroke_fill=text.stroke_fill)
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if debug:
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draw.rectangle([(text.x_range[0] * img.size[0], text.y_range[0] * img.size[1]),
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(text.x_range[1] * img.size[0], text.y_range[1] * img.size[1])],
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None, (128, 128, 128))
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else:
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width = round((text.x_range[1] - text.x_range[0]) * img.size[0])
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height = round((text.y_range[1] - text.y_range[0]) * img.size[1])
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center_x = (text.x_range[0] + text.x_range[1]) * img.size[0] / 2
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center_y = (text.y_range[0] + text.y_range[1]) * img.size[1] / 2
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txt_img = Image.new('RGBA', (width, height))
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txt_draw = ImageDraw.Draw(txt_img)
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txt_draw.text(get_text_pos(img.size, text, font, relative=True), text.text, fill=text.fill,
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align=text.align, font=font, stroke_width=round(text.stroke_width * font.size),
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stroke_fill=text.stroke_fill)
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if debug:
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txt_draw.rectangle([(0, 0), (width - 1, height - 1)],
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None, (128, 128, 128))
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txt_img = txt_img.rotate(text.angle, expand=1, resample=Image.BILINEAR)
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img.paste(txt_img,
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(round(center_x - txt_img.size[0] / 2), round(center_y - txt_img.size[1] / 2)),
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txt_img)
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else:
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logger.warning(f"Invalid font '{text.font}'")
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def fit_text(size: Tuple[int, int], text: Text) -> Tuple[str, ImageFont.FreeTypeFont]:
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max_width = round(size[0] * (text.x_range[1] - text.x_range[0]))
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max_height = round(size[1] * (text.y_range[1] - text.y_range[0]))
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text_size = None
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font_size = round(text.font_size * min(size)) + 1
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font = FONTS[text.font]
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text_content = ""
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while (text_size is None or text_size[0] >= max_width or text_size[1] >= max_height) and font_size > 1:
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font_size -= 1
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font = font.font_variant(size=font_size)
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n_lines = 0
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while n_lines == 0 or (text_content is not None and text_size[0] >= max_width):
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n_lines += 1
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text_content = utils.justify_text(text.text, n_lines)
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if text_content is not None:
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text_size = font.getsize_multiline(text_content, stroke_width=text.stroke_width * font_size)
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if text_content is None:
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# max break attained
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text_size = None # retry
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return text_content, font
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def get_text_pos(size: Tuple[int, int], text: Text,
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font: ImageFont.FreeTypeFont, relative: bool = False) -> Tuple[int, int]:
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min_x = round(text.x_range[0] * size[0])
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max_x = round(text.x_range[1] * size[0])
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min_y = round(text.y_range[0] * size[1])
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max_y = round(text.y_range[1] * size[1])
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text_size = font.getsize_multiline(text.text, stroke_width=text.stroke_width * font.size)
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if int(text.position.value) // 3 == 0:
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pos_y = min_y
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elif int(text.position.value) // 3 == 1:
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pos_y = round((min_y + max_y) / 2 - text_size[1] / 2)
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else:
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pos_y = max_y - text_size[1]
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if int(text.position.value) % 3 == 0:
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pos_x = min_x
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elif int(text.position.value) % 3 == 1:
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pos_x = round((min_x + max_x) / 2 - text_size[0] / 2)
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else:
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pos_x = max_x - text_size[0]
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if relative:
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return pos_x - min_x, pos_y - min_y
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else:
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return pos_x, pos_y
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