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"""
Donut
Copyright (c) 2022-present NAVER Corp.
MIT License
"""
from collections import OrderedDict
import numpy as np
from synthtiger import components
from elements.textbox import TextBox
from layouts import GridStack
class TextReader:
def __init__(self, path, cache_size=2 ** 28, block_size=2 ** 20):
self.fp = open(path, "r", encoding="utf-8")
self.length = 0
self.offsets = [0]
self.cache = OrderedDict()
self.cache_size = cache_size
self.block_size = block_size
self.bucket_size = cache_size // block_size
self.idx = 0
while True:
text = self.fp.read(self.block_size)
if not text:
break
self.length += len(text)
self.offsets.append(self.fp.tell())
def __len__(self):
return self.length
def __iter__(self):
return self
def __next__(self):
char = self.get()
self.next()
return char
def move(self, idx):
self.idx = idx
def next(self):
self.idx = (self.idx + 1) % self.length
def prev(self):
self.idx = (self.idx - 1) % self.length
def get(self):
key = self.idx // self.block_size
if key in self.cache:
text = self.cache[key]
else:
if len(self.cache) >= self.bucket_size:
self.cache.popitem(last=False)
offset = self.offsets[key]
self.fp.seek(offset, 0)
text = self.fp.read(self.block_size)
self.cache[key] = text
self.cache.move_to_end(key)
char = text[self.idx % self.block_size]
return char
class Content:
def __init__(self, config):
self.margin = config.get("margin", [0, 0.1])
self.reader = TextReader(**config.get("text", {}))
self.font = components.BaseFont(**config.get("font", {}))
self.layout = GridStack(config.get("layout", {}))
self.textbox = TextBox(config.get("textbox", {}))
self.textbox_color = components.Switch(components.Gray(), **config.get("textbox_color", {}))
self.content_color = components.Switch(components.Gray(), **config.get("content_color", {}))
def generate(self, size):
width, height = size
layout_left = width * np.random.uniform(self.margin[0], self.margin[1])
layout_top = height * np.random.uniform(self.margin[0], self.margin[1])
layout_width = max(width - layout_left * 2, 0)
layout_height = max(height - layout_top * 2, 0)
layout_bbox = [layout_left, layout_top, layout_width, layout_height]
text_layers, texts = [], []
layouts = self.layout.generate(layout_bbox)
self.reader.move(np.random.randint(len(self.reader)))
for layout in layouts:
font = self.font.sample()
for bbox, align in layout:
x, y, w, h = bbox
text_layer, text = self.textbox.generate((w, h), self.reader, font)
self.reader.prev()
if text_layer is None:
continue
text_layer.center = (x + w / 2, y + h / 2)
if align == "left":
text_layer.left = x
if align == "right":
text_layer.right = x + w
self.textbox_color.apply([text_layer])
text_layers.append(text_layer)
texts.append(text)
self.content_color.apply(text_layers)
return text_layers, texts
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