当顶点和顶点索引为空时不绘制

src/renderer/backend/dx/dx_window.cpp

@@ -133,11 +133,11 @@ void dx_window::begin_frame() {
             }
 
             context.draw_rectangle({ pos_x, pos_y }, { 1, 100 }, random_color);
-            pos_x += 1;
             if (pos_x >= 1000) {
                 pos_x = 0;
                 draw_test = false;
             }
+            pos_x += 1;
         }
     }
 

src/renderer/core/renderer/renderer_context.h

@@ -47,6 +47,7 @@ public:
         return triangles;
     }
     void flush() {
+        if (vertices.empty() || triangles.empty()) return;
         if (default_pipeline) {
             default_pipeline->set_triangle(vertices, triangles);
             default_pipeline->draw();