157 lines
7.6 KiB
Python
157 lines
7.6 KiB
Python
from PIL import Image, ImageDraw, ImageFont
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class ImageText(object):
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def __init__(self, filename_or_size, mode='RGBA', background=(0, 0, 0, 0),
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encoding='utf8'):
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if isinstance(filename_or_size, str):
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self.filename = filename_or_size
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self.image = Image.open(self.filename)
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self.initial_image = Image.open(self.filename)
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self.size = self.image.size
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elif isinstance(filename_or_size, (list, tuple)):
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self.size = filename_or_size
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self.image = Image.new(mode, self.size, color=background)
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self.initial_image = Image.new(mode, self.size, color=background)
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self.filename = None
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self.draw = ImageDraw.Draw(self.image)
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self.encoding = encoding
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def reset_image(self):
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self.image = self.initial_image
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self.draw = ImageDraw.Draw(self.image)
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def save(self, filename=None):
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self.image.save(filename or self.filename)
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def get_image(self):
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return self.image
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def get_font_size(self, text, font, max_width=None, max_height=None, stroke_size=0):
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if max_width is None and max_height is None:
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raise ValueError('You need to pass max_width or max_height')
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font_size = 1
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text_size = self.get_text_size(font, font_size, text, stroke_size=stroke_size)
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if (max_width is not None and text_size[0] > max_width) or \
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(max_height is not None and text_size[1] > max_height):
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raise ValueError("Text can't be filled in only (%dpx, %dpx)" % \
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text_size)
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while True:
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if (max_width is not None and text_size[0] >= max_width) or \
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(max_height is not None and text_size[1] >= max_height):
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return font_size - 1
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font_size += 1
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text_size = self.get_text_size(font, font_size, text, stroke_size=stroke_size)
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def write_text(self, xy, text, font_filename, font_size=11,
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color=(0, 0, 0), max_width=None, max_height=None, stroke_color = None, stroke_size = 0):
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x, y = xy
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if isinstance(text, str):
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try:
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text = text.decode(self.encoding)
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except Exception as e:
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pass
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if font_size == 'fill' and \
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(max_width is not None or max_height is not None):
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font_size = self.get_font_size(text, font_filename, max_width,
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max_height, stroke_size=stroke_size)
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text_size = self.get_text_size(font_filename, font_size, text, stroke_size=stroke_size)
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font = ImageFont.truetype(font_filename, font_size)
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if x == 'center':
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x = (self.size[0] - text_size[0]) / 2
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if y == 'center':
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y = (self.size[1] - text_size[1]) / 2
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self.draw.text((x, y), text, font=font, fill=color, stroke_width=stroke_size, stroke_fill=stroke_color)
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return text_size
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def get_text_size(self, font_filename, font_size, text, stroke_size = 0):
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font = ImageFont.truetype(font_filename, font_size)
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return font.getsize(text, stroke_width=stroke_size)
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def fill_text_box(self, xy, text, box_width, box_height, font_filename,
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start_font_size=1, color=(0,0,0), place='left',
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justify_last_line=False):
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font_size = start_font_size
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while True:
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width, height, box_width, _ = self.write_text_box(xy, text, box_width,
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font_filename, font_size, color, place)
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if (width >= box_width) or (height >= box_height):
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font_size -= 1
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self.reset_image()
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self.write_text_box(xy, text, box_width,
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font_filename, font_size, color, place)
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break
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font_size += 1
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return (box_width, box_height)
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def write_text_box(self, xy, text, box_width, font_filename,
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font_size=11, color=(0, 0, 0), place='left',
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justify_last_line=False, stroke_color = None, stroke_size = 0, calculate_only = False):
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x, y = xy
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lines = []
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line = []
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words = text.split()
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for word in words:
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new_line = ' '.join(line + [word])
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size = self.get_text_size(font_filename, font_size, new_line, stroke_size=stroke_size)
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text_height = size[1]
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if size[0] <= box_width:
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line.append(word)
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else:
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lines.append(line)
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line = [word]
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if line:
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lines.append(line)
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lines = [' '.join(line) for line in lines if line]
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height = y
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max_x_size = -1
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for index, line in enumerate(lines):
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if place == 'left':
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total_size = self.get_text_size(font_filename, font_size, line)
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if not calculate_only:
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self.write_text((x, height), line, font_filename, font_size,
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color, stroke_color=stroke_color, stroke_size=stroke_size)
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elif place == 'right':
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total_size = self.get_text_size(font_filename, font_size, line)
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x_left = x + box_width - total_size[0]
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if not calculate_only:
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self.write_text((x_left, height), line, font_filename,
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font_size, color, stroke_color=stroke_color, stroke_size=stroke_size)
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elif place == 'center':
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total_size = self.get_text_size(font_filename, font_size, line)
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x_left = int(x + ((box_width - total_size[0]) / 2))
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if not calculate_only:
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self.write_text((x_left, height), line, font_filename,
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font_size, color, stroke_color=stroke_color, stroke_size=stroke_size)
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elif place == 'justify':
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words = line.split()
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if (index == len(lines) - 1 and not justify_last_line) or len(words) == 1:
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if not calculate_only:
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self.write_text((x, height), line, font_filename, font_size, color, stroke_color=stroke_color, stroke_size=stroke_size)
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continue
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line_without_spaces = ''.join(words)
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total_size = self.get_text_size(font_filename, font_size,
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line_without_spaces, stroke_size=stroke_size)
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space_width = (box_width - total_size[0]) / (len(words) - 1.0)
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start_x = x
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for word in words[:-1]:
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if not calculate_only:
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self.write_text((start_x, height), word, font_filename,
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font_size, color, stroke_size=stroke_size)
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word_size = self.get_text_size(font_filename, font_size,
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word, stroke_size=stroke_size)
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start_x += word_size[0] + space_width
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last_word_size = self.get_text_size(font_filename, font_size,
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words[-1], stroke_size=stroke_size)
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last_word_x = x + box_width - last_word_size[0]
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if not calculate_only:
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self.write_text((last_word_x, height), words[-1], font_filename,
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font_size, color, stroke_color=stroke_color, stroke_size=stroke_size)
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height += text_height
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if total_size[0] > max_x_size:
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max_x_size = total_size[0]
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return (total_size[0], height - y, box_width, max_x_size) |