拖动导入模型帧率异常修复，添加web视图

ui/panels/editor_panels.py

@@ -1,7 +1,14 @@
 from imgui_bundle import imgui, imgui_ctx
 import os
+import io
+import tempfile
+import time
 from pathlib import Path
-from panda3d.core import PNMImage, StringStream, Texture
+from panda3d.core import Filename
+try:
+    from PIL import Image
+except Exception:  # pragma: no cover - pillow may be missing in minimal env
+    Image = None
 
 
 class EditorPanels:
@@ -36,10 +43,10 @@ class EditorPanels:
             self.app.web_panel_url_input = "https://www.example.com"
         if not hasattr(self.app, "_imgui_webview"):
             self.app._imgui_webview = None
-        if not hasattr(self.app, "_imgui_webview_texture"):
-            self.app._imgui_webview_texture = None
         if not hasattr(self.app, "_imgui_webview_tex_id"):
             self.app._imgui_webview_tex_id = None
+        if not hasattr(self.app, "_imgui_webview_texture_path"):
+            self.app._imgui_webview_texture_path = None
 
     def _start_imgui_webview(self, url):
         self._ensure_web_panel_state()
@@ -76,7 +83,13 @@ class EditorPanels:
             except Exception:
                 pass
         self.app._imgui_webview_tex_id = None
-        self.app._imgui_webview_texture = None
+        texture_path = getattr(self.app, "_imgui_webview_texture_path", None)
+        if texture_path:
+            try:
+                Path(texture_path).unlink(missing_ok=True)
+            except Exception:
+                pass
+        self.app._imgui_webview_texture_path = None
 
     def _navigate_web_panel(self):
         self._ensure_web_panel_state()
@@ -102,19 +115,21 @@ class EditorPanels:
         if not jpeg_bytes:
             return
 
-        pnm = PNMImage()
-        if not pnm.read(StringStream(jpeg_bytes), "imgui_webview.png"):
-            webview.tex_dirty = False
+        try:
+            if Image is None:
+                self.app.add_warning_message("缺少 Pillow，无法更新Web纹理")
                 return
+            img = Image.open(io.BytesIO(jpeg_bytes)).convert("RGBA")
             # p3dimgui 纹理坐标系与网页截图存在Y轴方向差异，先在像素层修正
-        pnm.flip(False, True, False)
+            img = img.transpose(Image.FLIP_TOP_BOTTOM)
 
-        # 某些后端在“已注册纹理原位更新”时存在稳定性问题。
-        # 改为每次创建新纹理并替换旧纹理ID，避免原位更新导致崩溃。
-        texture = Texture("imgui_web_panel_texture")
-        texture.load(pnm)
-        new_tex_id = self.app.imgui.loadTexture(texture)
+            temp_dir = Path(tempfile.gettempdir()) / "eg_imgui_webpanel"
+            temp_dir.mkdir(parents=True, exist_ok=True)
+            temp_path = temp_dir / f"webview_{time.time_ns()}.png"
+            img.save(temp_path, format="PNG")
 
+            panda_path = Filename.fromOsSpecific(str(temp_path)).getFullpath()
+            new_tex_id = self.app.imgui.loadTexture(panda_path)
             old_tex_id = getattr(self.app, "_imgui_webview_tex_id", None)
             if old_tex_id:
                 try:
@@ -122,9 +137,18 @@ class EditorPanels:
                 except Exception:
                     pass
 
-        self.app._imgui_webview_texture = texture
-        self.app._imgui_webview_tex_id = new_tex_id
+            old_texture_path = getattr(self.app, "_imgui_webview_texture_path", None)
+            if old_texture_path:
+                try:
+                    Path(old_texture_path).unlink(missing_ok=True)
+                except Exception:
+                    pass
 
+            self.app._imgui_webview_tex_id = new_tex_id
+            self.app._imgui_webview_texture_path = str(temp_path)
+        except Exception as e:
+            self.app.add_warning_message(f"Web纹理更新失败: {e}")
+        finally:
             webview.tex_dirty = False
 
     @staticmethod