Initial project baseline
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import math
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import random
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import numpy as np
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from PIL import Image, ImageDraw, ImageFont
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from matplotlib.path import Path as MplPath
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from matplotlib.textpath import TextPath
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from matplotlib.transforms import Affine2D
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from . import config
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from .ewc import EfficientWordCloud
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from .fonts import get_cached_font, get_font_properties
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def normalize_relative_scores(values):
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if not values:
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return []
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v_min = min(values)
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v_max = max(values)
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if math.isclose(v_min, v_max):
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return [1.0 for _ in values]
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scale = v_max - v_min
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return [(value - v_min) / scale for value in values]
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def build_log_rank_scores(freq_list, *, per_word=False):
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if not freq_list:
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return []
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if per_word:
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word_weights = {}
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for word, freq in freq_list:
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f = max(float(freq), 1e-6)
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if word not in word_weights or f > word_weights[word]:
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word_weights[word] = f
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unique_weights = sorted(set(word_weights.values()), reverse=True)
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if len(unique_weights) <= 1:
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word_scores = {w: 1.0 for w in word_weights}
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else:
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log_vals = [math.log1p(w) for w in unique_weights]
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normed = normalize_relative_scores(log_vals)
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weight_to_score = dict(zip(unique_weights, normed))
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word_scores = {w: weight_to_score[weight] for w, weight in word_weights.items()}
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return [word_scores.get(w, 1.0) for w, _ in freq_list]
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safe_freqs = [max(float(freq), 1e-6) for _word, freq in freq_list]
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log_scores = normalize_relative_scores([math.log1p(freq) for freq in safe_freqs])
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rank_scores = [1.0 - (idx / max(1, len(freq_list) - 1)) for idx in range(len(freq_list))]
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total_ratio = config.LOG_WEIGHT_RATIO + config.RANK_WEIGHT_RATIO
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if total_ratio <= 0:
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return log_scores
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log_ratio = config.LOG_WEIGHT_RATIO / total_ratio
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rank_ratio = config.RANK_WEIGHT_RATIO / total_ratio
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return [
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max(0.0, min(1.0, log_score * log_ratio + rank_score * rank_ratio))
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for log_score, rank_score in zip(log_scores, rank_scores)
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]
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def pick_palette_color(relative_score):
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if config.FONT_COLOR:
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return config.FONT_COLOR
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palette = config.LIGHT_COLOR_PALETTE if config.FILL_ON == "WHITE" else config.DARK_COLOR_PALETTE
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if not palette:
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return "#111111"
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idx = min(len(palette) - 1, max(0, int(round((1.0 - relative_score) * (len(palette) - 1)))))
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return palette[idx]
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def _build_layout_sequence(sorted_freq, max_words, layout_order_mode, layout_seed):
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if max_words <= 0 or not sorted_freq:
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return []
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expanded_freq = list(sorted_freq)
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if len(expanded_freq) < max_words:
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base_words = expanded_freq[:]
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if not base_words:
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return []
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while len(expanded_freq) < max_words:
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for item in base_words:
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if len(expanded_freq) >= max_words:
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break
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expanded_freq.append(item)
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expanded_freq = expanded_freq[:max_words]
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if layout_order_mode == config.LAYOUT_ORDER_MODE_SORTED or len(expanded_freq) <= 1:
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return expanded_freq
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band_count = min(3, len(expanded_freq))
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band_size = math.ceil(len(expanded_freq) / band_count)
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bands = []
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rng = random.Random(layout_seed)
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for band_idx in range(band_count):
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start = band_idx * band_size
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end = min(len(expanded_freq), start + band_size)
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band = expanded_freq[start:end]
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rng.shuffle(band)
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if band:
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bands.append(band)
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interleave_pattern = [0, 1, 0, 2]
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band_positions = [0] * len(bands)
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sequence = []
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while len(sequence) < len(expanded_freq):
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appended = False
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for pattern_idx in interleave_pattern:
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if pattern_idx >= len(bands):
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continue
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pos = band_positions[pattern_idx]
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if pos >= len(bands[pattern_idx]):
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continue
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sequence.append(bands[pattern_idx][pos])
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band_positions[pattern_idx] += 1
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appended = True
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if len(sequence) >= len(expanded_freq):
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break
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if appended:
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continue
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for band_idx, band in enumerate(bands):
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pos = band_positions[band_idx]
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if pos < len(band):
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sequence.append(band[pos])
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band_positions[band_idx] += 1
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appended = True
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if len(sequence) >= len(expanded_freq):
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break
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if not appended:
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break
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return sequence
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class OptimizedEfficientWordCloud(EfficientWordCloud):
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def __init__(self, *args, large_font_ratio=config.LARGE_FONT_LIMIT_RATIO, size_scale=1.0, **kwargs):
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super().__init__(*args, **kwargs)
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self.large_font_ratio = large_font_ratio
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self.size_scale = size_scale
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def generate_from_frequencies(self, frequencies):
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if isinstance(frequencies, dict):
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freq_list = list(frequencies.items())
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elif isinstance(frequencies, list):
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freq_list = frequencies
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else:
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raise ValueError("frequencies 必须是字典或 (word, freq) 列表")
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sorted_freq = sorted(freq_list, key=lambda x: x[1], reverse=True)
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layout_sequence = _build_layout_sequence(
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sorted_freq,
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self.max_words,
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config.LAYOUT_ORDER_MODE,
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config.LAYOUT_SEED,
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)
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if not layout_sequence:
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return self
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self.layout_ = []
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per_word_scores = build_log_rank_scores(freq_list, per_word=True)
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word_to_score = {}
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for (w, _f), s in zip(freq_list, per_word_scores):
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if w not in word_to_score or s > word_to_score[w]:
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word_to_score[w] = s
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score_by_index = [word_to_score.get(w, 1.0) for w, _ in layout_sequence]
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effective_max_font = max(self.min_font_size + 1, int(self.max_font_size * self.size_scale))
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large_threshold = int(effective_max_font * config.LARGE_FONT_THRESHOLD_RATIO) if config.LIMIT_LARGE_FONTS else None
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large_limit = int(self.max_words * self.large_font_ratio) if config.LIMIT_LARGE_FONTS else None
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large_count = 0
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rotation_flags = [np.random.random() > self.prefer_horizontal for _ in layout_sequence]
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# Dummy draw for textbbox measurement (no actual PIL image needed during placement)
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_measure_img = Image.new("L", (1, 1))
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_measure_draw = ImageDraw.Draw(_measure_img)
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base_span = max(1, self.max_font_size - self.min_font_size)
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target_font_sizes = []
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for score in score_by_index:
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raw_size = self.min_font_size + base_span * score
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f_size = max(config.MIN_FONT_FLOOR, int(round(raw_size * self.size_scale)))
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target_font_sizes.append(f_size)
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gap_fill_list = [] # 收集未成功放置的词，用于第二轮填充
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for idx, (word, _freq) in enumerate(layout_sequence):
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font_size = target_font_sizes[idx]
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if config.LIMIT_LARGE_FONTS and large_threshold is not None and large_limit is not None:
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if font_size >= large_threshold and large_count >= large_limit:
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font_size = max(self.min_font_size, int(large_threshold * config.LARGE_FONT_CAP_RATIO))
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current_size = font_size
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min_attempt_size = max(self.min_font_size, int(current_size * 0.4))
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placed = False
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while current_size >= min_attempt_size:
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orientation = None
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rotate = rotation_flags[idx]
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if rotate:
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orientation = Image.ROTATE_90
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font = get_cached_font(self.font_path, current_size)
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if orientation:
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transposed = ImageFont.TransposedFont(font, orientation=orientation)
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else:
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transposed = font
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bbox = _measure_draw.textbbox((0, 0), word, font=transposed)
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w_text = bbox[2] - bbox[0]
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h_text = bbox[3] - bbox[1]
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query_w = w_text + self.margin
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query_h = h_text + self.margin
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pos = self.grid.query_direct(query_h, query_w, np.random.randint(0, 2**31))
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if pos is not None:
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y, x = pos
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draw_y = y + self.margin // 2
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draw_x = x + self.margin // 2
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# Stamp glyph bitmap into C++ canvas for pixel-accurate collision
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font = get_cached_font(self.font_path, current_size)
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if orientation:
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transposed = ImageFont.TransposedFont(font, orientation=orientation)
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else:
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transposed = font
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glyph_mask = transposed.getmask(word, mode="L")
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gw, gh = glyph_mask.size
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glyph_arr = np.frombuffer(bytes(glyph_mask), dtype=np.uint8).reshape(gh, gw)
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self.grid.stamp_and_rebuild(glyph_arr, gh, gw, draw_y, draw_x)
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color = pick_palette_color(score_by_index[idx])
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self.layout_.append((word, current_size, (draw_y, draw_x), orientation, color))
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if config.LIMIT_LARGE_FONTS and large_threshold is not None and current_size >= large_threshold:
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large_count += 1
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placed = True
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break
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current_size -= 2
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if not placed:
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gap_fill_list.append((word, score_by_index[idx]))
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# ── Gap-filling pass: 用更小的字号填充剩余空隙 ──────────────
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if gap_fill_list:
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gap_font_size = max(config.MIN_FONT_FLOOR, int(self.min_font_size * 0.8))
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if gap_font_size >= config.MIN_FONT_FLOOR:
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placed_gap = 0
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for word, score in gap_fill_list:
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font = get_cached_font(self.font_path, gap_font_size)
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bbox = _measure_draw.textbbox((0, 0), word, font=font)
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w_text = bbox[2] - bbox[0]
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h_text = bbox[3] - bbox[1]
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query_w = w_text + self.margin
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query_h = h_text + self.margin
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pos = self.grid.query_direct(query_h, query_w, np.random.randint(0, 2**31))
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if pos is not None:
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y, x = pos
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draw_y = y + self.margin // 2
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draw_x = x + self.margin // 2
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glyph_mask = font.getmask(word, mode="L")
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gw, gh = glyph_mask.size
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glyph_arr = np.frombuffer(bytes(glyph_mask), dtype=np.uint8).reshape(gh, gw)
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self.grid.stamp_and_rebuild(glyph_arr, gh, gw, draw_y, draw_x)
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color = pick_palette_color(score)
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self.layout_.append((word, gap_font_size, (draw_y, draw_x), None, color))
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placed_gap += 1
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if placed_gap > 0:
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config._warn(f"Gap-filling: 用小字号 {gap_font_size} 额外放置了 {placed_gap}/{len(gap_fill_list)} 个词")
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return self
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def to_image(self):
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img = Image.new(self.mode, (self.width, self.height), self.background_color)
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draw = ImageDraw.Draw(img)
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for word, size, (y, x), orient, color in self.layout_:
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font = get_cached_font(self.font_path, size)
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if orient:
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font = ImageFont.TransposedFont(font, orientation=orient)
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draw.text((x, y), word, font=font, fill=color)
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return img
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def to_svg(self, filename):
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background = self.background_color
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with open(filename, "w", encoding="utf-8") as f:
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f.write(
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f'<svg width="{self.width}" height="{self.height}" viewBox="0 0 {self.width} {self.height}" '
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f'xmlns="http://www.w3.org/2000/svg">\n'
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)
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f.write(f'<rect width="100%" height="100%" fill="{background}"/>\n')
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for word, size, (y, x), orient, color in self.layout_:
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try:
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path, tx, ty, _ = build_svg_text_path(word, size, x, y, self.font_path, orient)
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except Exception as exc:
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config._warn(f"SVG path 导出失败，跳过词条: {word}, error={exc}")
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continue
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f.write(f'<path d="{path}" transform="translate({tx:.3f} {ty:.3f}) scale(1 -1)" fill="{color}"/>\n')
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f.write("</svg>\n")
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def to_svg_stroke(self, filename, stroke_color="#000000", stroke_width=1.0):
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"""生成描边版 SVG，适合激光雕刻机使用（描边路径，无填充）。"""
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with open(filename, "w", encoding="utf-8") as f:
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f.write(
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f'<svg width="{self.width}" height="{self.height}" viewBox="0 0 {self.width} {self.height}" '
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f'xmlns="http://www.w3.org/2000/svg">\n'
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)
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f.write(f'<rect width="100%" height="100%" fill="none"/>\n')
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for word, size, (y, x), orient, _color in self.layout_:
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try:
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path, tx, ty, _ = build_svg_text_path(word, size, x, y, self.font_path, orient)
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except Exception as exc:
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config._warn(f"SVG stroke path 导出失败，跳过词条: {word}, error={exc}")
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continue
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f.write(
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f'<path d="{path}" transform="translate({tx:.3f} {ty:.3f}) scale(1 -1)" '
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f'fill="none" stroke="{stroke_color}" stroke-width="{stroke_width}" '
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f'stroke-linejoin="round" stroke-linecap="round"/>\n'
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)
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f.write("</svg>\n")
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def to_svg_dotfill(self, filename, dot_spacing=10, dot_radius=2, dot_color="#000000"):
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"""生成点阵填充 SVG：文字区域用密排小圆点填充，适合激光雕刻逐点打标。"""
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from .render import render_layout_occupancy
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occ = render_layout_occupancy(self.layout_, (self.height, self.width), self.font_path)
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occ_arr = np.array(occ)
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with open(filename, "w", encoding="utf-8") as f:
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f.write(
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f'<svg width="{self.width}" height="{self.height}" viewBox="0 0 {self.width} {self.height}" '
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f'xmlns="http://www.w3.org/2000/svg">\n'
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)
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f.write(f'<rect width="100%" height="100%" fill="none"/>\n')
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half = dot_spacing / 2
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dot_count = 0
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h, w = occ_arr.shape
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for gy in range(0, h, dot_spacing):
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for gx in range(0, w, dot_spacing):
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cy = min(gy + int(half), h - 1)
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cx = min(gx + int(half), w - 1)
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if occ_arr[cy, cx]:
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f.write(
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f'<circle cx="{cx}" cy="{cy}" r="{dot_radius}" '
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f'fill="{dot_color}" stroke="none"/>\n'
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)
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dot_count += 1
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f.write("</svg>\n")
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return dot_count
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def to_svg_custom(self, filename, fill_mode="fill", do_stroke=False,
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dot_spacing=10, dot_radius=2, color="#000000",
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line_spacing=6, line_width=1, line_angle=0,
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ring_radius=3, ring_width=1, ring_spacing=8):
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"""统一 SVG 导出：fill_mode=fill|dot|line|ring，可叠加描边。"""
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# 预先构建所有文字路径（fill / dot 模式共用）
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text_paths = []
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for word, size, (y, x), orient, _color in self.layout_:
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try:
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path, tx, ty, _ = build_svg_text_path(word, size, x, y, self.font_path, orient)
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text_paths.append((path, tx, ty))
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except Exception as exc:
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config._warn(f"SVG path 导出失败，跳过: {word}, error={exc}")
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with open(filename, "w", encoding="utf-8") as f:
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f.write(
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f'<svg width="{self.width}" height="{self.height}" viewBox="0 0 {self.width} {self.height}" '
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f'xmlns="http://www.w3.org/2000/svg">\n'
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)
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f.write(f'<rect width="100%" height="100%" fill="none"/>\n')
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if fill_mode == "dot":
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# 点阵模式：用 SVG pattern 平铺圆点 + clipPath 裁剪到文字形状
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f.write('<defs>\n')
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f.write(f' <pattern id="dot-pat" x="0" y="0" width="{dot_spacing}" height="{dot_spacing}" patternUnits="userSpaceOnUse">\n')
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half = dot_spacing / 2
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f.write(f' <circle cx="{half}" cy="{half}" r="{dot_radius}" fill="{color}"/>\n')
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f.write(' </pattern>\n')
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self._write_text_clip(f, text_paths)
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f.write('</defs>\n')
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f.write(f'<rect width="{self.width}" height="{self.height}" fill="url(#dot-pat)" clip-path="url(#text-clip)"/>\n')
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elif fill_mode == "line":
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# 线条填充：用 matplotlib Path 渲染占用蒙版（与 SVG 完全对齐）
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import math as _m
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occ = render_path_occupancy(self.layout_, (self.height, self.width), self.font_path)
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angle = line_angle % 360
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rad = _m.radians(angle)
|
||||
cos_a, sin_a = _m.cos(rad), _m.sin(rad)
|
||||
h, w = occ.shape
|
||||
step = 1 # 逐像素采样，保证线段连续
|
||||
# 垂直方向的总范围（确保覆盖整个画布）
|
||||
perp_max = abs(h * cos_a) + abs(w * sin_a)
|
||||
n_lines = max(1, int(perp_max / line_spacing) + 1)
|
||||
sw = f'{line_width:g}'
|
||||
path_parts = []
|
||||
for i in range(n_lines):
|
||||
d0 = (i - n_lines // 2) * line_spacing
|
||||
sx = -d0 * sin_a
|
||||
sy = d0 * cos_a
|
||||
n_steps = int(perp_max) + 1
|
||||
run_start = None
|
||||
for s in range(n_steps + 1):
|
||||
px = sx + s * step * cos_a
|
||||
py = sy + s * step * sin_a
|
||||
ix, iy = int(round(px)), int(round(py))
|
||||
inside = (0 <= iy < h and 0 <= ix < w and occ[iy, ix])
|
||||
if inside:
|
||||
if run_start is None:
|
||||
run_start = (px, py)
|
||||
else:
|
||||
if run_start is not None:
|
||||
ex = px - step * cos_a
|
||||
ey = py - step * sin_a
|
||||
path_parts.append(f'M{run_start[0]:.1f} {run_start[1]:.1f}L{ex:.1f} {ey:.1f}')
|
||||
run_start = None
|
||||
if run_start is not None:
|
||||
ex = sx + n_steps * step * cos_a
|
||||
ey = sy + n_steps * step * sin_a
|
||||
path_parts.append(f'M{run_start[0]:.1f} {run_start[1]:.1f}L{ex:.1f} {ey:.1f}')
|
||||
if path_parts:
|
||||
f.write(f'<path d="{" ".join(path_parts)}" fill="none" stroke="{color}" stroke-width="{sw}" stroke-linecap="round"/>\n')
|
||||
|
||||
elif fill_mode == "ring":
|
||||
# 空心圆点填充：闭合路径，激光机可描一圈
|
||||
occ = render_path_occupancy(self.layout_, (self.height, self.width), self.font_path)
|
||||
h, w = occ.shape
|
||||
r = ring_radius
|
||||
sw = f'{ring_width:g}'
|
||||
circle_parts = []
|
||||
for gy in range(r, h - r, ring_spacing):
|
||||
for gx in range(r, w - r, ring_spacing):
|
||||
if not occ[gy, gx]:
|
||||
continue
|
||||
lx = gx - r
|
||||
rx = gx + r
|
||||
circle_parts.append(
|
||||
f'M{lx} {gy}A{r} {r} 0 1 0 {rx} {gy}A{r} {r} 0 1 0 {lx} {gy}Z'
|
||||
)
|
||||
if circle_parts:
|
||||
f.write(f'<path d="{" ".join(circle_parts)}" fill="none" stroke="{color}" stroke-width="{sw}"/>\n')
|
||||
|
||||
# 只有 fill 模式和显式描边时才输出 matplotlib 文字路径
|
||||
# ring/line 模式用 PIL occupancy mask 生成填充，不需要文字轮廓
|
||||
if fill_mode == "fill" or do_stroke:
|
||||
for path, tx, ty in text_paths:
|
||||
fill_attr = color if fill_mode == "fill" else "none"
|
||||
stroke_attr = f'stroke="{color}" stroke-width="1" stroke-linejoin="round" stroke-linecap="round"' if do_stroke else ""
|
||||
f.write(f'<path d="{path}" transform="translate({tx:.3f} {ty:.3f}) scale(1 -1)" fill="{fill_attr}" {stroke_attr}/>\n')
|
||||
|
||||
f.write("</svg>\n")
|
||||
|
||||
@staticmethod
|
||||
def _write_text_clip(f, text_paths):
|
||||
"""将文字路径写入 <clipPath id="text-clip">（调用方负责 <defs> 开闭）。"""
|
||||
f.write(' <clipPath id="text-clip">\n')
|
||||
for path, tx, ty in text_paths:
|
||||
f.write(f' <path d="{path}" transform="translate({tx:.3f} {ty:.3f}) scale(1 -1)"/>\n')
|
||||
f.write(' </clipPath>\n')
|
||||
|
||||
|
||||
def build_svg_text_path(word, size, x, y, font_path, orient):
|
||||
path = TextPath((0, 0), word, prop=get_font_properties(font_path, size), size=size)
|
||||
if orient:
|
||||
path = path.transformed(Affine2D().rotate_deg(-90))
|
||||
bbox = path.get_extents()
|
||||
tx = x - bbox.xmin
|
||||
ty = y + bbox.ymax
|
||||
# 返回变换后的 Path（已定位到画布坐标）以及 SVG 用的偏移量
|
||||
transformed = path.transformed(Affine2D().scale(1, -1).translate(tx, ty))
|
||||
return mpl_path_to_svg_d(path), tx, ty, transformed
|
||||
|
||||
|
||||
def mpl_path_to_svg_d(path):
|
||||
parts = []
|
||||
for vertices, code in path.iter_segments():
|
||||
if code == MplPath.MOVETO:
|
||||
x, y = vertices
|
||||
parts.append(f"M{x:.3f} {y:.3f}")
|
||||
elif code == MplPath.LINETO:
|
||||
x, y = vertices
|
||||
parts.append(f"L{x:.3f} {y:.3f}")
|
||||
elif code == MplPath.CURVE3:
|
||||
x1, y1, x2, y2 = vertices
|
||||
parts.append(f"Q{x1:.3f} {y1:.3f} {x2:.3f} {y2:.3f}")
|
||||
elif code == MplPath.CURVE4:
|
||||
x1, y1, x2, y2, x3, y3 = vertices
|
||||
parts.append(
|
||||
f"C{x1:.3f} {y1:.3f} {x2:.3f} {y2:.3f} {x3:.3f} {y3:.3f}"
|
||||
)
|
||||
elif code == MplPath.CLOSEPOLY:
|
||||
parts.append("Z")
|
||||
return " ".join(parts)
|
||||
|
||||
|
||||
def render_path_occupancy(layout_data, canvas_shape, font_path):
|
||||
"""渲染文字占用蒙版：字形笔画=1，字内空洞（如口）=0，外部=0。
|
||||
|
||||
使用 PIL 渲染文字蒙版（与画布坐标完全对齐）+ 边界泛洪填充来区分外部区域与字内空洞。
|
||||
layout_data: [(word, size, (y, x), orient, color), ...] 同 self.layout_
|
||||
"""
|
||||
from collections import deque
|
||||
|
||||
h, w = canvas_shape
|
||||
if not layout_data:
|
||||
return np.zeros((h, w), dtype=np.uint8)
|
||||
|
||||
# 用 PIL 渲染文字蒙版（坐标系与 to_image() 完全一致）
|
||||
mask = Image.new("L", (w, h), 0)
|
||||
draw = ImageDraw.Draw(mask)
|
||||
for word, size, (y, x), orient, _color in layout_data:
|
||||
font = get_cached_font(font_path, size)
|
||||
if orient:
|
||||
font = ImageFont.TransposedFont(font, orientation=orient)
|
||||
draw.text((x, y), word, font=font, fill=255)
|
||||
|
||||
occ_raw = (np.array(mask) > 127).astype(np.uint8)
|
||||
|
||||
# 泛洪填充：从边框出发标记所有与外部连通的白色区域
|
||||
# 口 等闭合字符的内部空洞不会与边框连通，因此正确保留为空
|
||||
outside = np.zeros_like(occ_raw, dtype=np.uint8)
|
||||
q = deque()
|
||||
for x in range(w):
|
||||
if occ_raw[0, x]:
|
||||
q.append((0, x))
|
||||
outside[0, x] = 1
|
||||
if occ_raw[h - 1, x]:
|
||||
q.append((h - 1, x))
|
||||
outside[h - 1, x] = 1
|
||||
for y in range(1, h - 1):
|
||||
if occ_raw[y, 0]:
|
||||
q.append((y, 0))
|
||||
outside[y, 0] = 1
|
||||
if occ_raw[y, w - 1]:
|
||||
q.append((y, w - 1))
|
||||
outside[y, w - 1] = 1
|
||||
|
||||
while q:
|
||||
cy, cx = q.popleft()
|
||||
for dy, dx in ((-1, 0), (1, 0), (0, -1), (0, 1)):
|
||||
ny, nx = cy + dy, cx + dx
|
||||
if 0 <= ny < h and 0 <= nx < w and occ_raw[ny, nx] and not outside[ny, nx]:
|
||||
outside[ny, nx] = 1
|
||||
q.append((ny, nx))
|
||||
|
||||
# 最终蒙版：文字笔画=1，外部和字内空洞=0
|
||||
return (occ_raw & (~outside).astype(np.uint8)).astype(np.uint8)
|
||||
|
||||
Reference in New Issue
Block a user