From 610d7e00a78124ec04c5bebd9f771d0126ff752f Mon Sep 17 00:00:00 2001
From: Alagris <alagris12358@gmail.com>
Date: Tue, 22 Jun 2021 10:40:57 +0200
Subject: [PATCH] improvement for subbuffer

---
 ocl/src/standard/buffer.rs | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/ocl/src/standard/buffer.rs b/ocl/src/standard/buffer.rs
index b50309ac2..912c73518 100644
--- a/ocl/src/standard/buffer.rs
+++ b/ocl/src/standard/buffer.rs
@@ -2046,8 +2046,17 @@ impl<T: OclPrm> Buffer<T> {
                 offset, len, buffer_len).into());
         }
 
-        let obj_core = core::create_sub_buffer::<T>(self, flags,
-            &BufferRegion::new(offset, len))?;
+        let (offset,obj_core) = if let Some(parent_offset) =  self.offset(){
+            let offset = parent_offset+offset;
+            let reg = BufferRegion::new(offset, len);
+            (offset,match self.mem_info(MemInfo::AssociatedMemobject).unwrap() {
+                MemInfoResult::AssociatedMemobject(Some(parent)) => core::create_sub_buffer::<T>(&parent, flags,&reg)?,
+                _ => unreachable!(),
+            })
+        }else{
+            let reg = BufferRegion::new(offset, len);
+            (offset,core::create_sub_buffer::<T>(self, flags,&reg)?)
+        };
 
         Ok(Buffer {
             obj_core,