专题图修改

app/services/qgis/qgis_runner.py

@@ -43,61 +43,21 @@ def _setup_python_path():
 
 
 def _setup_environment():
-    """设置 QGIS 运行所需的环境变量"""
-    # 自动检测 QGIS 应用目录（与 run_qgis.bat 保持一致）
-    qgis_app_dir = os.path.join(QGIS_ROOT, "apps", "qgis-ltr")
-    if not os.path.isdir(qgis_app_dir):
-        qgis_app_dir = os.path.join(QGIS_ROOT, "apps", "qgis")
+    """设置 QGIS 运行所需的环境变量。
 
-    # ★ 必须在任何 DLL 加载前设置 PROJ_DATA，防止 PostgreSQL 的旧 proj.db 干扰
-    for proj_dir in [
-        os.path.join(qgis_app_dir, "share", "proj"),
-        os.path.join(QGIS_ROOT, "share", "proj"),
-        os.path.join(QGIS_ROOT, "apps", "gdal", "share", "proj"),
-    ]:
-        if os.path.isdir(proj_dir):
-            os.environ["PROJ_DATA"] = proj_dir
-            break
+    注意：QGIS Python 3.12 自带完整的 DLL 配置，不应设置
+    QGIS_PREFIX_PATH、QT_PLUGIN_PATH、PATH 等变量，
+    否则会与 QGIS 内置的 DLL 加载机制冲突，
+    导致 0xC0000005 (ACCESS_VIOLATION) 崩溃。
 
-    os.environ["QGIS_PREFIX_PATH"] = qgis_app_dir
+    仅设置不影响 DLL 加载的辅助变量。
+    """
+    # 仅设置 UTF-8 和 GDAL 相关的编码变量（不影响 DLL 加载）
     os.environ["PYTHONUTF8"] = "1"
     os.environ["GDAL_FILENAME_IS_UTF8"] = "YES"
     os.environ["VSI_CACHE"] = "TRUE"
     os.environ["VSI_CACHE_SIZE"] = "1000000"
 
-    if sys.platform == "win32":
-        os.environ["QT_PLUGIN_PATH"] = (
-            f"{os.path.join(qgis_app_dir, 'qtplugins')};"
-            f"{os.path.join(QGIS_ROOT, 'apps', 'Qt5', 'plugins')}"
-        )
-        gdal_data = os.path.join(QGIS_ROOT, "apps", "gdal", "share", "gdal")
-        if os.path.isdir(gdal_data):
-            os.environ["GDAL_DATA"] = gdal_data
-
-        import ctypes
-        _dll_dirs = [
-            os.path.join(qgis_app_dir, "bin"),
-            os.path.join(QGIS_ROOT, "apps", "Qt5", "bin"),
-            os.path.join(QGIS_ROOT, "apps", "gdal", "lib"),
-        ]
-        _preload_dlls = [
-            "qgis_core.dll", "qgispython.dll",
-            "Qt5Core.dll", "Qt5Gui.dll", "Qt5Widgets.dll",
-            "Qt5Network.dll", "Qt5Svg.dll", "Qt5Xml.dll",
-            "Qt5Concurrent.dll", "Qt5PrintSupport.dll",
-        ]
-        for dll_dir in _dll_dirs:
-            if not os.path.isdir(dll_dir):
-                continue
-            os.add_dll_directory(dll_dir)
-            for dll_name in _preload_dlls:
-                dll_path = os.path.join(dll_dir, dll_name)
-                if os.path.isfile(dll_path):
-                    try:
-                        ctypes.WinDLL(dll_path)
-                    except OSError:
-                        pass
-
 
 # ============================================================
 # 2. 主逻辑
@@ -189,8 +149,22 @@ def main():
         print(f"[qgis_runner] 致命错误 ({elapsed:.1f}s): {e}", file=sys.stderr)
         sys.exit(1)
     finally:
-        qgs_app.exitQgis()
+        # 跳过 qgs_app.exitQgis() — 已知 Qt DLL 在 exitQgis() 时会触发
+        # STATUS_ACCESS_VIOLATION (0xC0000005) 崩溃，进程通过 os._exit 终止，
+        # 操作系统会回收所有资源。
+        pass
 
 
 if __name__ == "__main__":
-    main()
+    try:
+        main()
+    except Exception:
+        pass
+    # 强制终止进程，避免 Qt/QGIS 后台线程在 ExitProcess 等待期间 DLL 崩溃
+    try:
+        import ctypes
+        ctypes.windll.kernel32.TerminateProcess(
+            ctypes.windll.kernel32.GetCurrentProcess(), 0
+        )
+    except Exception:
+        os._exit(0)