[PATCH 2/5] wined3d: Explicitly calculate the sub-resource layer in surface_download_data().

[Henri Verbeet]

Signed-off-by: Henri Verbeet 
---
 dlls/wined3d/surface.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/wined3d/surface.c b/dlls/wined3d/surface.c
index 657127f..0d09c2f 100644
--- a/dlls/wined3d/surface.c
+++ b/dlls/wined3d/surface.c
@@ -748,7 +748,8 @@ static void surface_download_data(struct wined3d_surface *surface, const struct
     }
     else if (temporary_mem)
     {
-        void *src_data = temporary_mem + surface->texture_layer * sub_resource->size;
+        unsigned int layer = sub_resource_idx / texture->level_count;
+        void *src_data = temporary_mem + layer * sub_resource->size;
         if (data.buffer_object)
         {
             GL_EXTCALL(glBindBuffer(GL_PIXEL_PACK_BUFFER, data.buffer_object));