diff --git a/src/renderer/wg_engine/tvgWgGeometry.h b/src/renderer/wg_engine/tvgWgGeometry.h
index b3e79a72..4319a22c 100755
--- a/src/renderer/wg_engine/tvgWgGeometry.h
+++ b/src/renderer/wg_engine/tvgWgGeometry.h
@@ -125,15 +125,8 @@ struct WgVertexBuffer {
 
     // append source vertex buffer in index range from start to end (end not included)
     void appendRange(const WgVertexBuffer& buff, size_t start_index, size_t end_index) {
-        if (start_index <= end_index)
-            for (size_t i = start_index; i < end_index; i++)
-                append(buff.vbuff[i]);
-        if (start_index > end_index) {
-            for (size_t i = start_index; i < buff.vcount; i++)
-                append(buff.vbuff[i]);
-            for (size_t i = 0; i < end_index; i++)
-                append(buff.vbuff[i]);
-        }
+        for (size_t i = start_index; i < end_index; i++)
+            append(buff.vbuff[i]);
     }
 
     // append circle (list of triangles)
diff --git a/src/renderer/wg_engine/tvgWgRenderData.cpp b/src/renderer/wg_engine/tvgWgRenderData.cpp
index fe651b7b..89906aad 100755
--- a/src/renderer/wg_engine/tvgWgRenderData.cpp
+++ b/src/renderer/wg_engine/tvgWgRenderData.cpp
@@ -365,6 +365,7 @@ void WgRenderDataShape::updateMeshes(WgContext &context, const RenderShape &rsha
     } else {
         float tbeg{}, tend{};
         if (!rshape.stroke->strokeTrim(tbeg, tend)) { tbeg = 0.0f; tend = 1.0f; }
+        bool loop = tbeg > tend;
         if (tbeg == tend) {
             pbuff.decodePath(rshape, false, [&](const WgVertexBuffer& path_buff) {
                 appendShape(context, path_buff);
@@ -372,7 +373,12 @@ void WgRenderDataShape::updateMeshes(WgContext &context, const RenderShape &rsha
         } else if (rshape.stroke->trim.simultaneous) {
             pbuff.decodePath(rshape, true, [&](const WgVertexBuffer& path_buff) {
                 appendShape(context, path_buff);
-                proceedStrokes(context, rshape.stroke, tbeg, tend, path_buff);
+                if (loop) {
+                    proceedStrokes(context, rshape.stroke, tbeg, 1.0f, path_buff);
+                    proceedStrokes(context, rshape.stroke, 0.0f, tend, path_buff);
+                } else {
+                    proceedStrokes(context, rshape.stroke, tbeg, tend, path_buff);
+                }
             });
         } else {
             float totalLen = 0.0f;
@@ -386,10 +392,22 @@ void WgRenderDataShape::updateMeshes(WgContext &context, const RenderShape &rsha
             // append strokes
             pbuff.decodePath(rshape, true, [&](const WgVertexBuffer& path_buff) {
                 float len_path = path_buff.total(); // current path length
-                float tbeg = ((len_acc <= len_beg) && (len_acc + len_path > len_beg)) ? (len_beg - len_acc) / len_path : 0.0f;
-                float tend = ((len_acc <= len_end) && (len_acc + len_path > len_end)) ? (len_end - len_acc) / len_path : 1.0f;
-                if ((len_acc + len_path >= len_beg) && (len_acc <= len_end))
-                    proceedStrokes(context, rshape.stroke, tbeg, tend, path_buff);
+                if (loop) {
+                    if (len_acc + len_path >= len_beg) {
+                        auto tbeg = len_acc <= len_beg ? (len_beg - len_acc) / len_path : 0.0f;
+                        proceedStrokes(context, rshape.stroke, tbeg, 1.0f, path_buff);
+                    }
+                    if (len_acc < len_end) {
+                        auto tend = len_acc + len_path >= len_end ? (len_end - len_acc) / len_path : 1.0f;
+                        proceedStrokes(context, rshape.stroke, 0.0f, tend, path_buff);
+                    }
+                } else {
+                    if (len_acc + len_path >= len_beg && len_acc <= len_end) {
+                        auto tbeg = len_acc <= len_beg ? (len_beg - len_acc) / len_path : 0.0f;
+                        auto tend = len_acc + len_path >= len_end ? (len_end - len_acc) / len_path : 1.0f;
+                        proceedStrokes(context, rshape.stroke, tbeg, tend, path_buff);
+                    }
+                }
                 len_acc += len_path;
             });
         }