feat(535-2): B09 도면 PDF PyMuPDF(AGPL) 제거 — 장마다 SVG 쪽 → 공용 PDF 엔진(Chromium) · pypdf 합치기

- 점선 = 미리 자른 실선 조각(Chromium 이 점선을 채운 윤곽으로 풀어 PDF 3 배 커지는 것 막음)
- 글 안 빈칸 그대로(white-space: pre) · 세운 글 방향 = 화면(openwebcad canvas)과 같게
- 못 넣은 그림 = data: 아님 · base64 깨짐
- test_302_2: PDF 읽기 pymupdf → pypdf · add_drawing_page(pymupdf 문서) 시험 → drawing_page(SVG) 로 고침 · 점선 조각 · 빈칸 시험 더함

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

resources/tester/test_302_2_print_drawings.py

@@ -1,18 +1,20 @@
-"""PLAN 302-2 인쇄 미리보기 도면 PDF — 목록 차례 · 쪽 수 · 쪽 크기 · 한글 · 숨긴 층 · 권한.
+"""PLAN 302-2 · 535-2 인쇄 미리보기 도면 PDF — 목록 차례 · 쪽 수 · 쪽 크기 · 한글 · 숨긴 층 · 권한 ·
+점선 조각 · 그림 · 빈칸 그대로(PDF 읽기 = pypdf).
 
 임시 폴더 견본만 씀(공용 storage 안 씀) — B07 목록 · 단건 · 표제란 값은 바꿔 끼움.
 """
 
 from __future__ import annotations
 
+import io
 import json
 from pathlib import Path
 from uuid import uuid4
 
-import pymupdf
 import pytest
 from fastapi import FastAPI
 from fastapi.testclient import TestClient
+from pypdf import PdfReader
 
 from B07_DesignDetail.B07_DesignDetail_Engine_Template import (
     frame_entities,
@@ -24,7 +26,8 @@ from B09_Estimation.draft import B09_Draft_Print_Drawings_Router as router_modul
 from B09_Estimation.draft import B09_Draft_Print_Drawings_Source as source
 from B09_Estimation.draft.B09_Draft_Print_Drawings_Pdf import (
     PT_PER_MM,
-    add_drawing_page,
+    dash_pieces,
+    drawing_page,
     paint_color,
 )
 from common_util import common_util_auth as auth
@@ -170,18 +173,21 @@ def test_PDF_쪽수_크기_한글_숨긴층(sample):
     assert response.headers["content-type"] == "application/pdf"
     assert response.headers["x-aislo-pages"] == "5"
     assert json.loads(response.headers["x-aislo-skipped-images"]) == {}
-    doc = pymupdf.open(stream=response.content, filetype="pdf")
-    assert doc.page_count == 5
-    for page in doc:
-        assert abs(page.rect.width / PT_PER_MM - 840) < 0.5
-        assert abs(page.rect.height / PT_PER_MM - 594) < 0.5
-    first = doc[0].get_text()
+    if response.status_code == 503:
+        pytest.skip(response.json()["message"])  # 서버에 Edge · Chrome 없음
+    pages = PdfReader(io.BytesIO(response.content)).pages
+    assert len(pages) == 5
+    for page in pages:
+        assert abs(float(page.mediabox.width) / PT_PER_MM - 840) < 0.5
+        assert abs(float(page.mediabox.height) / PT_PER_MM - 594) < 0.5
+    texts = [page.extract_text() for page in pages]
+    first = texts[0]
     assert "가나다임도개설공사" in first and "라마바설계" in first  # 표제란 한글 그대로
     assert "보이는글" in first
     assert "숨은글" not in first and "얼린글" not in first
     # 구조물 장 = 얹은 도각 + 장 도번 · 표제란 = 프로젝트 값
-    assert "구조물그림" in doc[2].get_text() and "SD-000001" in doc[2].get_text()
-    assert "SD-000002-2" in doc[4].get_text() and "가나다임도개설공사" in doc[4].get_text()
+    assert "구조물그림" in texts[2] and "SD-000001" in texts[2]
+    assert "SD-000002-2" in texts[4] and "가나다임도개설공사" in texts[4]
 
 
 def test_PDF_고른_차례_모르는_id(sample):
@@ -189,8 +195,10 @@ def test_PDF_고른_차례_모르는_id(sample):
     client = _client(SESSION)
     picked = ["structure:SD-000001", "b07:cover"]
     response = client.post(f"/api/projects/{pid}/print/drawings-pdf", json={"ids": picked})
-    doc = pymupdf.open(stream=response.content, filetype="pdf")
-    assert doc.page_count == 2 and "구조물그림" in doc[0].get_text()
+    if response.status_code == 503:
+        pytest.skip(response.json()["message"])
+    pages = PdfReader(io.BytesIO(response.content)).pages
+    assert len(pages) == 2 and "구조물그림" in pages[0].extract_text()
     bad = client.post(f"/api/projects/{pid}/print/drawings-pdf", json={"ids": ["b07:없음"]})
     assert bad.status_code == 400
 
@@ -244,9 +252,14 @@ def test_로그인_회사_권한(sample, monkeypatch):
     assert _client(SESSION, project_company=1).get(path).status_code == 200
 
 
+#: 1×1 PNG
+PNG = (
+    "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAE"
+    "hQGAhKmMIQAAAABJRU5ErkJggg=="
+)
+
+
 def test_그림_넣기_못_넣은_수():
-    png = pymupdf.Pixmap(pymupdf.csRGB, pymupdf.IRect(0, 0, 4, 4), 0).tobytes("png")
-    import base64
 
     def image(data: str) -> dict:
         points = [{"x": 10, "y": 10}, {"x": 50, "y": 10}, {"x": 50, "y": 50}, {"x": 10, "y": 50}]
@@ -254,14 +267,31 @@ def test_그림_넣기_못_넣은_수():
 
     drawing = {
         "entities": [
-            image("data:image/png;base64," + base64.b64encode(png).decode()),
+            image("data:image/png;base64," + PNG),
             image("/api/assets/없는그림.png"),
+            image("data:image/png;base64,@@깨진@@"),
         ],
         "layers": [],
     }
-    doc = pymupdf.open()
-    paper, skipped = add_drawing_page(doc, drawing)
-    assert skipped == 1 and len(doc[0].get_images()) == 1
+    page, size, paper, skipped = drawing_page(drawing)
+    assert skipped == 2 and page.count("<image ") == 1
+
+
+def test_점선_조각_빈칸_그대로():
+    """점선 = 미리 자른 실선 조각(Chromium 이 윤곽으로 안 풂) · 무늬 = 꺾은선 처음부터 이어 셈."""
+    pieces = dash_pieces([(0, 0), (10, 0), (10, 10)], (6, 3))
+    assert pieces == [
+        [(0, 0), (6.0, 0.0)],
+        [(9.0, 0.0), (10, 0), (10.0, 5.0)],
+        [(10.0, 8.0), (10, 10)],
+    ]
+    assert dash_pieces([(0, 0), (1, 0)], (0, 0)) == [[(0, 0), (1, 0)]]  # 무늬 없음 = 실선
+    line = {"type": "Line", "layerId": "a", "lineDash": [6, 3]}
+    line["shapeData"] = {"startPoint": {"x": 0, "y": 0}, "endPoint": {"x": 100, "y": 0}}
+    text = _text("축      척", 50, 50, "a")
+    page, size, paper, _ = drawing_page({"entities": [line, text], "layers": []})
+    assert "stroke-dasharray" not in page and page.count("M") > 5
+    assert "축      척" in page and "white-space: pre" in page
 
 
 def test_미확정_횡단_구조물_Node_번들이_돎():