"""DXF → PNG 렌더(ezdxf+matplotlib). 사용: python render_dxf.py <dxf> <out.png> [pixels_wide=6000] [x0 y0 x1 y1 (도면 좌표 영역)]  — 도면에서 그림을 잘라 쓰기 위한 도구(제1 기준 자료는 DXF)."""
import sys
import ezdxf, matplotlib
matplotlib.use("Agg")
import matplotlib.pyplot as plt
from ezdxf.addons.drawing import RenderContext, Frontend
from ezdxf.addons.drawing.matplotlib import MatplotlibBackend


def render(dxf, out, wpx=6000, box=None):
    doc = ezdxf.readfile(dxf)
    fig = plt.figure(figsize=(wpx / 100, wpx / 100 * 0.7), dpi=100); ax = fig.add_axes([0, 0, 1, 1])
    Frontend(RenderContext(doc), MatplotlibBackend(ax)).draw_layout(doc.modelspace(), finalize=True)
    ax.set_facecolor("#20262f"); fig.patch.set_facecolor("#20262f")
    if box:
        x0, y0, x1, y1 = box
        ax.set_xlim(x0, x1); ax.set_ylim(y0, y1); ax.set_aspect("equal")
        fig.set_size_inches(wpx / 100, wpx / 100 * (y1 - y0) / (x1 - x0))
    fig.savefig(out, dpi=100)
    lim = (ax.get_xlim(), ax.get_ylim()); plt.close(fig); return lim


if __name__ == "__main__":
    a = sys.argv
    box = tuple(float(v) for v in a[4:8]) if len(a) >= 8 else None
    print(render(a[1], a[2], int(a[3]) if len(a) > 3 else 6000, box))