1 files changed, 17 insertions, 0 deletions
diff --git a/src/gui/painting/qdatabuffer_p.h b/src/gui/painting/qdatabuffer_p.h
index 275ec13d7..b568f43ce 100644
--- a/src/gui/painting/qdatabuffer_p.h
+++ b/src/gui/painting/qdatabuffer_p.h
@@ -114,6 +114,23 @@ public:
         qSwap(buffer, other.buffer);
     }
 
+    inline void insertBlank(int pos, int count) {
+        Q_ASSERT(pos >= 0);
+        Q_ASSERT(pos < siz);
+        reserve(siz + count);
+        for (int i = siz - pos - 1; i >= 0; --i)
+            buffer[pos + count + i] = buffer[pos + i];
+        siz += count;
+    }
+
+    inline void removeAndShift(int pos, int count) {
+        Q_ASSERT(pos >= 0);
+        Q_ASSERT(pos < siz);
+        for (int i=pos; i<siz-count; ++i)
+            buffer[i] = buffer[i+count];
+        siz -= count;
+    }
+
     inline QDataBuffer &operator<<(const Type &t) { add(t); return *this; }
 
 private: