a01a53648f
Generated with tools/gen_manual_art.py (gemini-3-pro / 3.1-flash / 2.5-flash), consistent picture-book style, no text in images, ~480KB total. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
79 lines
3.8 KiB
Python
79 lines
3.8 KiB
Python
"""Generate backnforth manual illustrations via Gemini image API (nano banana)."""
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import base64
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import json
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import os
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import sys
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import time
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import urllib.request
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# key from disk, never printed
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KEY = os.environ.get("GEMINI_API_KEY")
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if not KEY:
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sys.exit('set GEMINI_API_KEY in the environment first')
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MODELS = ['gemini-3-pro-image', 'gemini-3.1-flash-image',
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'gemini-2.5-flash-image']
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STYLE = ("Flat vector cartoon illustration in a warm, friendly picture-book style. "
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"Soft rounded shapes, thick clean outlines, muted palette of deep teal, warm coral, "
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"cream and soft mustard yellow. Cozy, calm, reassuring mood. Simple, uncluttered "
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"composition on a plain cream background. Absolutely no text, no letters, no numbers, "
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"no words anywhere in the image. Landscape orientation. ")
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SCENES = {
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'01-cover': "A friendly therapist and a relaxed patient sitting in comfy armchairs in a cozy "
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"counselling room with a potted plant and a soft floor lamp. On a low table between "
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"them, an open laptop shows a dark screen with a single glowing green dot.",
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'02-open': "Close-up of gentle hands opening a slightly-worn laptop on a wooden table. The screen "
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"shows a simple dark page with one large round green play button and a small green dot.",
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'03-link': "One hand passing an old smartphone to another person's open hand. The phone screen "
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"glows dark with a single bright green dot. In the soft-focus background, a laptop "
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"shows the same green dot, suggesting the two screens are connected by a dotted arc.",
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'04-follow': "Side profile of a calm person's face with a serene expression, eyes looking to one "
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"side, following a small glowing green dot that trails a gentle curved motion path "
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"from the left side of the image to the right.",
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'05-adjust': "A hand with one finger adjusting a single very large horizontal slider on a dark "
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"tablet screen. At the left end of the slider sits a tiny cute cartoon turtle, at "
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"the right end a tiny cute cartoon rabbit.",
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'06-care': "A therapist leaning forward attentively with a kind expression, offering a glass of "
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"water to a patient who looks calm and relieved. The laptop on the side table is "
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"closed. Warm afternoon light through a window.",
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}
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OUT = os.path.expanduser('~/Documents/backnforth/img/manual')
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os.makedirs(OUT, exist_ok=True)
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def generate(prompt):
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body = json.dumps({'contents': [{'parts': [{'text': prompt}]}]}).encode()
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last = None
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for model in MODELS:
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url = ('https://generativelanguage.googleapis.com/v1beta/models/'
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'%s:generateContent?key=%s' % (model, KEY))
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req = urllib.request.Request(url, data=body,
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headers={'Content-Type': 'application/json'})
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for attempt in (1, 2):
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try:
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with urllib.request.urlopen(req, timeout=300) as r:
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data = json.load(r)
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for part in data['candidates'][0]['content']['parts']:
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if 'inlineData' in part:
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return base64.b64decode(part['inlineData']['data']), model
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last = 'no image part in response from %s' % model
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break # empty response: don't retry same model, fall through
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except Exception as e:
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last = '%s (try %d): %s' % (model, attempt, e)
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raise RuntimeError(last)
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for name, scene in SCENES.items():
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path = os.path.join(OUT, name + '.png')
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if os.path.exists(path):
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print(name, 'exists, skipping')
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continue
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img, model = generate(STYLE + scene)
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open(path, 'wb').write(img)
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print('%s: %d KB via %s' % (name, len(img) // 1024, model))
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time.sleep(2)
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print('done')
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