perf(wallpaper): ignore files that are not images

Cargo.lock

@@ -638,6 +638,17 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "cfb"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d38f2da7a0a2c4ccf0065be06397cc26a81f4e528be095826eee9d4adbb8c60f"
+dependencies = [
+ "byteorder",
+ "fnv",
+ "uuid",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -1004,6 +1015,7 @@ dependencies = [
  "freedesktop-icons",
  "futures-lite 1.13.0",
  "image",
+ "infer",
  "rayon",
  "smithay-client-toolkit 0.18.0",
  "tokio",
@@ -2606,6 +2618,15 @@ dependencies = [
  "hashbrown 0.14.3",
 ]
 
+[[package]]
+name = "infer"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb33622da908807a06f9513c19b3c1ad50fab3e4137d82a78107d502075aa199"
+dependencies = [
+ "cfb",
+]
+
 [[package]]
 name = "inotify"
 version = "0.9.6"
@@ -4988,6 +5009,12 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
+[[package]]
+name = "uuid"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e395fcf16a7a3d8127ec99782007af141946b4795001f876d54fb0d55978560"
+
 [[package]]
 name = "valuable"
 version = "0.1.0"

pages/desktop/Cargo.toml

@@ -12,6 +12,7 @@ dirs = "5.0.1"
 freedesktop-icons = "0.2.4"
 futures-lite = "1.13.0"
 image = "0.24.6"
+infer = "0.15.0"
 rayon = "1.7.0"
 sctk = { git = "https://github.com/smithay/client-toolkit/", package = "smithay-client-toolkit", rev = "dc8c4a0"}
 tokio = { version = "1.28.0", features = ["sync"] }

pages/desktop/src/wallpaper.rs

@@ -93,8 +93,11 @@ pub fn load_each_from_path(path: PathBuf) -> Receiver<(PathBuf, RgbaImage, RgbaI
     let (tx, rx) = mpsc::channel(1);
 
     tokio::task::spawn(async move {
+        // Scratch space for storing images into.
         let mut buffer = Vec::new();
+        // Directories to search recursively.
         let mut paths = vec![path];
+        // Discovered image files that will be loaded as wallpapers.
         let mut wallpapers = BTreeSet::new();
 
         while let Some(path) = paths.pop() {
@@ -106,10 +109,17 @@ pub fn load_each_from_path(path: PathBuf) -> Receiver<(PathBuf, RgbaImage, RgbaI
 
                     let path = entry.path();
 
+                    // Recursively search directories, while storing only image files.
                     if file_type.is_dir() {
                         paths.push(path);
                     } else if file_type.is_file() {
-                        wallpapers.insert(path);
+                        let Ok(Some(kind)) = infer::get_from_path(&path) else {
+                            continue
+                        };
+
+                        if infer::MatcherType::Image == kind.matcher_type() {
+                            wallpapers.insert(path);
+                        }
                     }
                 }
             }