wayland/dmabuf: Allow global creation with a client filter

CHANGELOG.md

@@ -22,6 +22,7 @@
 - Setting the parent of a toplevel surface is now possible with the `xdg::ToplevelSurface::set_parent` function.
 - Add support for the zxdg-foreign-v2 protocol.
 - Support for `xdg_wm_base` protocol version 3
+- Added the option to initialize the dmabuf global with a client filter
 
 ### Bugfixes
 

src/wayland/dmabuf/mod.rs

@@ -54,7 +54,7 @@ use wayland_protocols::unstable::linux_dmabuf::v1::server::{
     },
     zwp_linux_dmabuf_v1,
 };
-use wayland_server::{protocol::wl_buffer, DispatchData, Display, Filter, Global, Main};
+use wayland_server::{protocol::wl_buffer, Client, DispatchData, Display, Filter, Global, Main};
 
 use slog::{o, trace};
 
@@ -63,9 +63,7 @@ use crate::backend::allocator::{
     Format, Fourcc, Modifier,
 };
 
-/// Handler trait for dmabuf validation
+const DMABUF_VERSION: u32 = 3;
-///
-/// You need to provide an implementation of this trait
 
 /// Initialize a dmabuf global.
 ///
@@ -77,6 +75,37 @@ pub fn init_dmabuf_global<F, L>(
     handler: F,
     logger: L,
 ) -> Global<zwp_linux_dmabuf_v1::ZwpLinuxDmabufV1>
+where
+    L: Into<Option<::slog::Logger>>,
+    F: for<'a> FnMut(&Dmabuf, DispatchData<'a>) -> bool + 'static,
+{
+    display.create_global(DMABUF_VERSION, dmabuf_global(formats, handler, logger))
+}
+
+/// Initialize a dmabuf global with a client filter.
+///
+/// You need to provide a vector of the supported formats, as well as a closure,
+/// that will validate the parameters provided by the client and tests the import as a dmabuf.
+pub fn init_dmabuf_global_with_filter<H, F, L>(
+    display: &mut Display,
+    formats: Vec<Format>,
+    handler: H,
+    filter: F,
+    logger: L,
+) -> Global<zwp_linux_dmabuf_v1::ZwpLinuxDmabufV1>
+where
+    L: Into<Option<::slog::Logger>>,
+    H: for<'a> FnMut(&Dmabuf, DispatchData<'a>) -> bool + 'static,
+    F: FnMut(Client) -> bool + 'static,
+{
+    display.create_global_with_filter(DMABUF_VERSION, dmabuf_global(formats, handler, logger), filter)
+}
+
+fn dmabuf_global<F, L>(
+    formats: Vec<Format>,
+    handler: F,
+    logger: L,
+) -> Filter<(Main<zwp_linux_dmabuf_v1::ZwpLinuxDmabufV1>, u32)>
 where
     L: Into<Option<::slog::Logger>>,
     F: for<'a> FnMut(&Dmabuf, DispatchData<'a>) -> bool + 'static,
@@ -92,8 +121,6 @@ where
         formats.len()
     );
 
-    display.create_global(
-        3,
     Filter::new(
         move |(dmabuf, version): (Main<zwp_linux_dmabuf_v1::ZwpLinuxDmabufV1>, u32), _, _| {
             let dma_formats = formats.clone();
@@ -137,9 +164,7 @@ where
                             height,
                             format,
                             flags,
-                            } => {
+                        } => handler.create_immed(&*params, buffer_id, width, height, format, flags, ddata),
-                                handler.create_immed(&*params, buffer_id, width, height, format, flags, ddata)
-                            }
                         _ => {}
                     });
                 }
@@ -157,7 +182,6 @@ where
                 }
             }
         },
-        ),
     )
 }