54 lines
1.4 KiB
Python
54 lines
1.4 KiB
Python
from defusedxml import ElementTree as ET
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def parse_svg_intrinsic_size(svg_data):
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try:
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root = ET.fromstring(svg_data)
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except ET.ParseError:
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return None, None
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viewbox = root.get("viewBox") or root.get("viewbox")
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if viewbox:
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parts = viewbox.replace(",", " ").split()
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if len(parts) == 4:
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try:
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vb_w = float(parts[2])
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vb_h = float(parts[3])
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if vb_w > 0 and vb_h > 0:
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return vb_w, vb_h
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except ValueError:
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pass
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def parse_len(value):
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if not value:
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return None
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cleaned = "".join(ch for ch in value if ch.isdigit() or ch in ".-")
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if not cleaned:
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return None
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try:
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parsed = float(cleaned)
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return parsed if parsed > 0 else None
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except ValueError:
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return None
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w = parse_len(root.get("width"))
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h = parse_len(root.get("height"))
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return w, h
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def fit_inside_canvas(src_w, src_h, dst_w, dst_h):
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if src_w <= 0 or src_h <= 0 or dst_w <= 0 or dst_h <= 0:
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return dst_w, dst_h
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src_ratio = src_w / src_h
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dst_ratio = dst_w / dst_h
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if src_ratio >= dst_ratio:
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fit_w = dst_w
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fit_h = max(1, round(fit_w / src_ratio))
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else:
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fit_h = dst_h
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fit_w = max(1, round(fit_h * src_ratio))
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return fit_w, fit_h
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