forked from genewildish/Mainline
David Gwilliam
dfe42b0883
- Create engine/legacy/ package for deprecated rendering modules - Move engine/render.py → engine/legacy/render.py (274 lines) - Move engine/layers.py → engine/legacy/layers.py (272 lines) - Update engine/legacy/layers.py to import from engine.legacy.render - Add comprehensive package documentation - Tests will be updated in next commit (Phase 3.3)
275 lines
9.2 KiB
Python
275 lines
9.2 KiB
Python
"""
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OTF → terminal half-block rendering pipeline.
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Font loading, text rasterization, word-wrap, gradient coloring, headline block assembly.
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Depends on: config, terminal, sources, translate.
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.. deprecated::
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This module contains legacy rendering code. New pipeline code should
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use the Stage-based pipeline architecture instead. This module is
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maintained for backwards compatibility with the demo mode.
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"""
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import random
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import re
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from pathlib import Path
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from PIL import Image, ImageDraw, ImageFont
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from engine import config
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from engine.sources import NO_UPPER, SCRIPT_FONTS, SOURCE_LANGS
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from engine.terminal import RST
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from engine.translate import detect_location_language, translate_headline
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# ─── GRADIENT ─────────────────────────────────────────────
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# Left → right: white-hot leading edge fades to near-black
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GRAD_COLS = [
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"\033[1;38;5;231m", # white
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"\033[1;38;5;195m", # pale cyan-white
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"\033[38;5;123m", # bright cyan
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"\033[38;5;118m", # bright lime
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"\033[38;5;82m", # lime
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"\033[38;5;46m", # bright green
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"\033[38;5;40m", # green
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"\033[38;5;34m", # medium green
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"\033[38;5;28m", # dark green
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"\033[38;5;22m", # deep green
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"\033[2;38;5;22m", # dim deep green
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"\033[2;38;5;235m", # near black
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]
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# Complementary sweep for queue messages (opposite hue family from ticker greens)
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MSG_GRAD_COLS = [
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"\033[1;38;5;231m", # white
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"\033[1;38;5;225m", # pale pink-white
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"\033[38;5;219m", # bright pink
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"\033[38;5;213m", # hot pink
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"\033[38;5;207m", # magenta
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"\033[38;5;201m", # bright magenta
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"\033[38;5;165m", # orchid-red
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"\033[38;5;161m", # ruby-magenta
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"\033[38;5;125m", # dark magenta
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"\033[38;5;89m", # deep maroon-magenta
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"\033[2;38;5;89m", # dim deep maroon-magenta
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"\033[2;38;5;235m", # near black
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]
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# ─── FONT LOADING ─────────────────────────────────────────
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_FONT_OBJ = None
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_FONT_OBJ_KEY = None
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_FONT_CACHE = {}
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def font():
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"""Lazy-load the primary OTF font (path + face index aware)."""
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global _FONT_OBJ, _FONT_OBJ_KEY
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if not config.FONT_PATH:
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raise FileNotFoundError(
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f"No primary font selected. Add .otf/.ttf/.ttc files to {config.FONT_DIR}."
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)
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key = (config.FONT_PATH, config.FONT_INDEX, config.FONT_SZ)
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if _FONT_OBJ is None or key != _FONT_OBJ_KEY:
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_FONT_OBJ = ImageFont.truetype(
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config.FONT_PATH, config.FONT_SZ, index=config.FONT_INDEX
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)
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_FONT_OBJ_KEY = key
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return _FONT_OBJ
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def clear_font_cache():
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"""Reset cached font objects after changing primary font selection."""
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global _FONT_OBJ, _FONT_OBJ_KEY
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_FONT_OBJ = None
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_FONT_OBJ_KEY = None
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def load_font_face(font_path, font_index=0, size=None):
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"""Load a specific face from a font file or collection."""
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font_size = size or config.FONT_SZ
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return ImageFont.truetype(font_path, font_size, index=font_index)
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def list_font_faces(font_path, max_faces=64):
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"""Return discoverable face indexes + display names from a font file."""
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faces = []
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for idx in range(max_faces):
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try:
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fnt = load_font_face(font_path, idx)
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except Exception:
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if idx == 0:
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raise
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break
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family, style = fnt.getname()
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display = f"{family} {style}".strip()
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if not display:
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display = f"{Path(font_path).stem} [{idx}]"
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faces.append({"index": idx, "name": display})
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return faces
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def font_for_lang(lang=None):
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"""Get appropriate font for a language."""
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if lang is None or lang not in SCRIPT_FONTS:
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return font()
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if lang not in _FONT_CACHE:
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try:
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_FONT_CACHE[lang] = ImageFont.truetype(SCRIPT_FONTS[lang], config.FONT_SZ)
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except Exception:
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_FONT_CACHE[lang] = font()
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return _FONT_CACHE[lang]
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# ─── RASTERIZATION ────────────────────────────────────────
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def render_line(text, fnt=None):
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"""Render a line of text as terminal rows using OTF font + half-blocks."""
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if fnt is None:
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fnt = font()
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bbox = fnt.getbbox(text)
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if not bbox or bbox[2] <= bbox[0]:
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return [""]
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pad = 4
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img_w = bbox[2] - bbox[0] + pad * 2
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img_h = bbox[3] - bbox[1] + pad * 2
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img = Image.new("L", (img_w, img_h), 0)
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draw = ImageDraw.Draw(img)
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draw.text((-bbox[0] + pad, -bbox[1] + pad), text, fill=255, font=fnt)
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pix_h = config.RENDER_H * 2
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hi_h = pix_h * config.SSAA
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scale = hi_h / max(img_h, 1)
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new_w_hi = max(1, int(img_w * scale))
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img = img.resize((new_w_hi, hi_h), Image.Resampling.LANCZOS)
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new_w = max(1, int(new_w_hi / config.SSAA))
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img = img.resize((new_w, pix_h), Image.Resampling.LANCZOS)
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data = img.tobytes()
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thr = 80
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rows = []
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for y in range(0, pix_h, 2):
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row = []
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for x in range(new_w):
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top = data[y * new_w + x] > thr
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bot = data[(y + 1) * new_w + x] > thr if y + 1 < pix_h else False
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if top and bot:
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row.append("█")
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elif top:
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row.append("▀")
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elif bot:
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row.append("▄")
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else:
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row.append(" ")
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rows.append("".join(row))
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while rows and not rows[-1].strip():
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rows.pop()
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while rows and not rows[0].strip():
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rows.pop(0)
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return rows if rows else [""]
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def big_wrap(text, max_w, fnt=None):
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"""Word-wrap text and render with OTF font."""
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if fnt is None:
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fnt = font()
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words = text.split()
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lines, cur = [], ""
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for word in words:
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test = f"{cur} {word}".strip() if cur else word
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bbox = fnt.getbbox(test)
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if bbox:
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img_h = bbox[3] - bbox[1] + 8
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pix_h = config.RENDER_H * 2
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scale = pix_h / max(img_h, 1)
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term_w = int((bbox[2] - bbox[0] + 8) * scale)
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else:
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term_w = 0
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if term_w > max_w - 4 and cur:
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lines.append(cur)
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cur = word
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else:
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cur = test
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if cur:
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lines.append(cur)
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out = []
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for i, ln in enumerate(lines):
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out.extend(render_line(ln, fnt))
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if i < len(lines) - 1:
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out.append("")
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return out
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def lr_gradient(rows, offset=0.0, grad_cols=None):
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"""Color each non-space block character with a shifting left-to-right gradient."""
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cols = grad_cols or GRAD_COLS
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n = len(cols)
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max_x = max((len(r.rstrip()) for r in rows if r.strip()), default=1)
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out = []
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for row in rows:
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if not row.strip():
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out.append(row)
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continue
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buf = []
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for x, ch in enumerate(row):
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if ch == " ":
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buf.append(" ")
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else:
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shifted = (x / max(max_x - 1, 1) + offset) % 1.0
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idx = min(round(shifted * (n - 1)), n - 1)
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buf.append(f"{cols[idx]}{ch}{RST}")
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out.append("".join(buf))
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return out
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def lr_gradient_opposite(rows, offset=0.0):
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"""Complementary (opposite wheel) gradient used for queue message panels."""
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return lr_gradient(rows, offset, MSG_GRAD_COLS)
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# ─── HEADLINE BLOCK ASSEMBLY ─────────────────────────────
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def make_block(title, src, ts, w):
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"""Render a headline into a content block with color."""
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target_lang = (
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(SOURCE_LANGS.get(src) or detect_location_language(title))
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if config.MODE == "news"
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else None
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)
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lang_font = font_for_lang(target_lang)
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if target_lang:
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title = translate_headline(title, target_lang)
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# Don't uppercase scripts that have no case (CJK, Arabic, etc.)
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if target_lang and target_lang in NO_UPPER:
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title_up = re.sub(r"\s+", " ", title)
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else:
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title_up = re.sub(r"\s+", " ", title.upper())
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for old, new in [
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("\u2019", "'"),
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("\u2018", "'"),
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("\u201c", '"'),
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("\u201d", '"'),
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("\u2013", "-"),
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("\u2014", "-"),
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]:
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title_up = title_up.replace(old, new)
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big_rows = big_wrap(title_up, w - 4, lang_font)
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hc = random.choice(
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[
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"\033[38;5;46m", # matrix green
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"\033[38;5;34m", # dark green
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"\033[38;5;82m", # lime
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"\033[38;5;48m", # sea green
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"\033[38;5;37m", # teal
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"\033[38;5;44m", # cyan
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"\033[38;5;87m", # sky
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"\033[38;5;117m", # ice blue
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"\033[38;5;250m", # cool white
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"\033[38;5;156m", # pale green
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"\033[38;5;120m", # mint
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"\033[38;5;80m", # dark cyan
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"\033[38;5;108m", # grey-green
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"\033[38;5;115m", # sage
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"\033[1;38;5;46m", # bold green
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"\033[1;38;5;250m", # bold white
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]
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)
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content = [" " + r for r in big_rows]
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content.append("")
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meta = f"\u2591 {src} \u00b7 {ts}"
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content.append(" " * max(2, w - len(meta) - 2) + meta)
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return content, hc, len(content) - 1 # (rows, color, meta_row_index)
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