diff --git a/dlls/wined3d/buffer.c b/dlls/wined3d/buffer.c
index f9cb251ad53..b299fe775e0 100644
--- a/dlls/wined3d/buffer.c
+++ b/dlls/wined3d/buffer.c
@@ -1194,68 +1194,26 @@ static void wined3d_buffer_unmap(struct wined3d_buffer *buffer)
 HRESULT wined3d_buffer_copy(struct wined3d_buffer *dst_buffer, unsigned int dst_offset,
         struct wined3d_buffer *src_buffer, unsigned int src_offset, unsigned int size)
 {
-    const struct wined3d_gl_info *gl_info;
     struct wined3d_bo_address dst, src;
     struct wined3d_context *context;
-    struct wined3d_device *device;
-    BYTE *dst_ptr, *src_ptr;
     DWORD dst_location;
 
     buffer_mark_used(dst_buffer);
     buffer_mark_used(src_buffer);
 
-    device = dst_buffer->resource.device;
-
-    context = context_acquire(device, NULL, 0);
-    gl_info = context->gl_info;
-
     dst_location = wined3d_buffer_get_memory(dst_buffer, &dst, dst_buffer->locations);
     dst.addr += dst_offset;
 
     wined3d_buffer_get_memory(src_buffer, &src, src_buffer->locations);
     src.addr += src_offset;
 
-    if (dst.buffer_object && src.buffer_object)
-    {
-        if (gl_info->supported[ARB_COPY_BUFFER])
-        {
-            GL_EXTCALL(glBindBuffer(GL_COPY_READ_BUFFER, src.buffer_object));
-            GL_EXTCALL(glBindBuffer(GL_COPY_WRITE_BUFFER, dst.buffer_object));
-            GL_EXTCALL(glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER,
-                    src_offset, dst_offset, size));
-            checkGLcall("direct buffer copy");
-        }
-        else
-        {
-            src_ptr = context_map_bo_address(context, &src, size, src_buffer->buffer_type_hint, WINED3D_MAP_READONLY);
-            dst_ptr = context_map_bo_address(context, &dst, size, dst_buffer->buffer_type_hint, 0);
-
-            memcpy(dst_ptr, src_ptr, size);
-
-            context_unmap_bo_address(context, &dst, dst_buffer->buffer_type_hint);
-            context_unmap_bo_address(context, &src, src_buffer->buffer_type_hint);
-        }
-    }
-    else if (!dst.buffer_object && src.buffer_object)
-    {
-        buffer_bind(src_buffer, context);
-        GL_EXTCALL(glGetBufferSubData(src_buffer->buffer_type_hint, src_offset, size, dst.addr));
-        checkGLcall("buffer download");
-    }
-    else if (dst.buffer_object && !src.buffer_object)
-    {
-        buffer_bind(dst_buffer, context);
-        GL_EXTCALL(glBufferSubData(dst_buffer->buffer_type_hint, dst_offset, size, src.addr));
-        checkGLcall("buffer upload");
-    }
-    else
-    {
-        memcpy(dst.addr, src.addr, size);
-    }
+    context = context_acquire(dst_buffer->resource.device, NULL, 0);
+    context_copy_bo_address(context, &dst, dst_buffer->buffer_type_hint,
+            &src, src_buffer->buffer_type_hint, size);
+    context_release(context);
 
     wined3d_buffer_invalidate_range(dst_buffer, ~dst_location, dst_offset, size);
 
-    context_release(context);
     return WINED3D_OK;
 }
 
diff --git a/dlls/wined3d/context.c b/dlls/wined3d/context.c
index e084d1cdeef..a2c0ba4080c 100644
--- a/dlls/wined3d/context.c
+++ b/dlls/wined3d/context.c
@@ -2752,6 +2752,54 @@ void context_unmap_bo_address(struct wined3d_context *context,
     checkGLcall("Unmap buffer object");
 }
 
+void context_copy_bo_address(struct wined3d_context *context,
+        const struct wined3d_bo_address *dst, GLenum dst_binding,
+        const struct wined3d_bo_address *src, GLenum src_binding, size_t size)
+{
+    const struct wined3d_gl_info *gl_info;
+    BYTE *dst_ptr, *src_ptr;
+
+    gl_info = context->gl_info;
+
+    if (dst->buffer_object && src->buffer_object)
+    {
+        if (gl_info->supported[ARB_COPY_BUFFER])
+        {
+            GL_EXTCALL(glBindBuffer(GL_COPY_READ_BUFFER, src->buffer_object));
+            GL_EXTCALL(glBindBuffer(GL_COPY_WRITE_BUFFER, dst->buffer_object));
+            GL_EXTCALL(glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER,
+                    (GLintptr)src->addr, (GLintptr)dst->addr, size));
+            checkGLcall("direct buffer copy");
+        }
+        else
+        {
+            src_ptr = context_map_bo_address(context, src, size, src_binding, WINED3D_MAP_READONLY);
+            dst_ptr = context_map_bo_address(context, dst, size, dst_binding, 0);
+
+            memcpy(dst_ptr, src_ptr, size);
+
+            context_unmap_bo_address(context, dst, dst_binding);
+            context_unmap_bo_address(context, src, src_binding);
+        }
+    }
+    else if (!dst->buffer_object && src->buffer_object)
+    {
+        context_bind_bo(context, src_binding, src->buffer_object);
+        GL_EXTCALL(glGetBufferSubData(src_binding, (GLintptr)src->addr, size, dst->addr));
+        checkGLcall("buffer download");
+    }
+    else if (dst->buffer_object && !src->buffer_object)
+    {
+        context_bind_bo(context, dst_binding, dst->buffer_object);
+        GL_EXTCALL(glBufferSubData(dst_binding, (GLintptr)dst->addr, size, src->addr));
+        checkGLcall("buffer upload");
+    }
+    else
+    {
+        memcpy(dst->addr, src->addr, size);
+    }
+}
+
 static void context_set_render_offscreen(struct wined3d_context *context, BOOL offscreen)
 {
     if (context->render_offscreen == offscreen)
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index eae451bf5e3..2270ae0f1c3 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -2073,6 +2073,9 @@ void context_bind_dummy_textures(const struct wined3d_device *device,
         const struct wined3d_context *context) DECLSPEC_HIDDEN;
 void context_bind_texture(struct wined3d_context *context, GLenum target, GLuint name) DECLSPEC_HIDDEN;
 void context_check_fbo_status(const struct wined3d_context *context, GLenum target) DECLSPEC_HIDDEN;
+void context_copy_bo_address(struct wined3d_context *context,
+        const struct wined3d_bo_address *dst, GLenum dst_binding,
+        const struct wined3d_bo_address *src, GLenum src_binding, size_t size) DECLSPEC_HIDDEN;
 struct wined3d_context *context_create(struct wined3d_swapchain *swapchain, struct wined3d_texture *target,
         const struct wined3d_format *ds_format) DECLSPEC_HIDDEN;
 HGLRC context_create_wgl_attribs(const struct wined3d_gl_info *gl_info, HDC hdc, HGLRC share_ctx) DECLSPEC_HIDDEN;