=
74 lines
2.8 KiB
Python
74 lines
2.8 KiB
Python
# -----------------------------------------------------------------------------
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# Description: Routed layout preview helpers that invoke the routing/build flow and return preview artifacts.
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# Inside functions: create_routed_layout_svg, layout_has_links
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# Developer : Qin Yue @ 2026
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# Organization : OptiHK Limited
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# -----------------------------------------------------------------------------
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import os
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import tempfile
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import yaml
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from layout_files import load_layout_cell_files, write_layout_cells_to_directory
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from router_dependency import require_router_stack
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def create_routed_layout_svg(
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yaml_content: str,
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output_path: str,
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pdk_root: str,
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project_dir: str,
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technology_manifest_path: str = None,
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prefer_full_gds: bool = False,
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) -> str:
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"""Create an SVG preview from routed GDS geometry generated by mxpic_router."""
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require_router_stack(require_gdstk=True)
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import gdstk
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layout = yaml.safe_load(yaml_content) or {}
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cell_name = str(layout.get("name") or "layout")
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from mxpic_router import build_project_gds
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os.makedirs(os.path.dirname(output_path), exist_ok=True)
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# Build into a temporary GDS first, then convert the generated top cell into
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# the SVG preview consumed by the canvas.
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with tempfile.TemporaryDirectory(prefix="mxpic_routed_preview_") as temp_dir:
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staged_project_dir = os.path.join(temp_dir, "project")
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saved_cells, _warnings = load_layout_cell_files(project_dir)
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staged_cells = [cell for cell in saved_cells if cell["name"] != cell_name]
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staged_cells.append({
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"filename": f"{cell_name}.yml",
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"name": cell_name,
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"data": layout,
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"content": yaml_content,
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})
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write_layout_cells_to_directory(staged_cells, staged_project_dir)
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temp_gds = os.path.join(temp_dir, f"{cell_name}.gds")
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build_project_gds(
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project_dir=staged_project_dir,
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output_path=temp_gds,
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pdk_root=pdk_root,
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technology_manifest_path=technology_manifest_path,
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prefer_full_gds=prefer_full_gds,
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target_cell_name=cell_name,
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)
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library = gdstk.read_gds(temp_gds)
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top_cells = library.top_level()
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if not top_cells:
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raise RuntimeError("Routed preview GDS has no top-level cell")
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top_cells[0].write_svg(output_path)
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return output_path
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def layout_has_links(yaml_content: str) -> bool:
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"""Detect whether a layout YAML document contains routed bundle links."""
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layout = yaml.safe_load(yaml_content) or {}
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# Any bundle link means preview generation must use the routed builder
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# instead of simple component placement.
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for bundle in (layout.get("bundles") or {}).values():
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links = bundle.get("links") or []
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if links:
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return True
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return False
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