63 lines
1.6 KiB
Python
63 lines
1.6 KiB
Python
#!/usr/bin/env python3
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# ollie:parallel read
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# ollie:tier cold
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# description: Read an image file, recompressing/resizing to fit context budget. Returns an image content block.
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# args: <file_path> [--region=x,y,w,h] [--scale=N] [--quality=N]
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import sys
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import os
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import base64
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import json
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import mimetypes
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file_path = None
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for a in sys.argv[1:]:
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if not a.startswith('--'):
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file_path = a
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if not file_path:
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print("usage: image_read <file_path>")
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sys.exit(1)
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if not os.path.isabs(file_path):
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print("STATUS=error")
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print("error: path must be absolute")
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sys.exit(1)
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if not os.path.exists(file_path):
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print("STATUS=not_found")
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sys.exit(0)
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mime, _ = mimetypes.guess_type(file_path)
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if not mime:
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mime = 'application/octet-stream'
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with open(file_path, 'rb') as f:
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data = f.read()
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MAX_SIZE = 128 * 1024
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if mime == 'image/png' and len(data) > MAX_SIZE:
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from PIL import Image
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import io
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img = Image.open(io.BytesIO(data))
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# progressively scale down until under budget
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for scale in [1.0, 0.75, 0.5, 0.35, 0.25]:
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buf = io.BytesIO()
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if scale < 1.0:
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new_size = (int(img.width * scale), int(img.height * scale))
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resized = img.resize(new_size, Image.LANCZOS)
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else:
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resized = img
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resized.save(buf, format='PNG', optimize=True)
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data = buf.getvalue()
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if len(data) <= MAX_SIZE:
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break
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b64 = base64.b64encode(data).decode('ascii')
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print(json.dumps({"isError": False, "content": [
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{"type": "image", "media_type": mime, "data": b64},
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{"type": "text", "text": f"[image: {os.path.basename(file_path)} {len(data)} bytes {mime}]"}
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]}))
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