Fix embedded _NET_WM_ICON on X11

Previously the _NET_WM_ICON would use the .ico which was also used for
the Windows icon. This icon used the dimensions 256x256, but the maximum
supported image size is 192x192, so a new image with the dimensions
64x64 has been added.

Since we know the image format anyways, the `image` dependency could
also be easily replaced with `png`, which cuts out a few extra unused
dependencies.

6 files changed, 22 insertions, 78 deletions

diff --git a/Cargo.lock b/Cargo.lock
index da881a72..68d0782b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -35,12 +35,12 @@ dependencies = [
  "fnv",
  "gl_generator",
  "glutin",
- "image",
  "libc",
  "log",
  "notify",
  "objc",
  "parking_lot",
+ "png",
  "serde",
  "serde_json",
  "serde_yaml",
@@ -197,12 +197,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0d8c1fef690941d3e7788d328517591fecc684c084084702d6ff1641e993699a"
 
 [[package]]
-name = "bytemuck"
-version = "1.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "41aa2ec95ca3b5c54cf73c91acf06d24f4495d5f1b1c12506ae3483d646177ac"
-
-[[package]]
 name = "byteorder"
 version = "1.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -565,16 +559,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "deflate"
-version = "0.8.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73770f8e1fe7d64df17ca66ad28994a0a623ea497fa69486e14984e715c5d174"
-dependencies = [
- "adler32",
- "byteorder",
-]
-
-[[package]]
 name = "derivative"
 version = "2.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -953,20 +937,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
 
 [[package]]
-name = "image"
-version = "0.23.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "985fc06b1304d19c28d5c562ed78ef5316183f2b0053b46763a0b94862373c34"
-dependencies = [
- "bytemuck",
- "byteorder",
- "num-iter",
- "num-rational",
- "num-traits",
- "png",
-]
-
-[[package]]
 name = "inotify"
 version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1341,38 +1311,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "num-integer"
-version = "0.1.43"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d59457e662d541ba17869cf51cf177c0b5f0cbf476c66bdc90bf1edac4f875b"
-dependencies = [
- "autocfg",
- "num-traits",
-]
-
-[[package]]
-name = "num-iter"
-version = "0.1.41"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a6e6b7c748f995c4c29c5f5ae0248536e04a5739927c74ec0fa564805094b9f"
-dependencies = [
- "autocfg",
- "num-integer",
- "num-traits",
-]
-
-[[package]]
-name = "num-rational"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5b4d7360f362cfb50dde8143501e6940b22f644be75a4cc90b2d81968908138"
-dependencies = [
- "autocfg",
- "num-integer",
- "num-traits",
-]
-
-[[package]]
 name = "num-traits"
 version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1573,13 +1511,12 @@ checksum = "3831453b3449ceb48b6d9c7ad7c96d5ea673e9b470a1dc578c2ce6521230884c"
 
 [[package]]
 name = "png"
-version = "0.16.7"
+version = "0.16.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dfe7f9f1c730833200b134370e1d5098964231af8450bce9b78ee3ab5278b970"
+checksum = "3c3287920cb847dee3de33d301c463fba14dda99db24214ddf93f83d3021f4c6"
 dependencies = [
  "bitflags",
  "crc32fast",
- "deflate",
  "miniz_oxide",
 ]
 
diff --git a/alacritty/Cargo.toml b/alacritty/Cargo.toml
index a4f774b1..b5ebefe2 100644
--- a/alacritty/Cargo.toml
+++ b/alacritty/Cargo.toml
@@ -39,7 +39,7 @@ gl_generator = "0.14.0"
 xdg = "2"
 
 [target.'cfg(not(target_os = "macos"))'.dependencies]
-image = { version = "0.23.3", default-features = false, features = ["ico"], optional = true }
+png = { version = "0.16.8", default-features = false, optional = true }
 
 [target.'cfg(target_os = "macos")'.dependencies]
 objc = "0.2.2"
@@ -56,7 +56,7 @@ embed-resource = "1.3"
 
 [features]
 default = ["wayland", "x11"]
-x11 = ["copypasta/x11", "glutin/x11", "x11-dl", "image"]
+x11 = ["copypasta/x11", "glutin/x11", "x11-dl", "png"]
 wayland = ["copypasta/wayland", "glutin/wayland", "wayland-client"]
 winpty = ["alacritty_terminal/winpty"]
 nightly = []
diff --git a/alacritty/alacritty.ico b/alacritty/alacritty.ico
deleted file mode 120000
index 55cd1859..00000000
--- a/alacritty/alacritty.ico
+++ /dev/null
@@ -1 +0,0 @@
-../extra/windows/alacritty.ico
\ No newline at end of file
diff --git a/alacritty/alacritty.png b/alacritty/alacritty.png
new file mode 120000
index 00000000..3865403a
--- /dev/null
+++ b/alacritty/alacritty.png
@@ -0,0 +1 @@
+../extra/logo/compat/alacritty-term.png
\ No newline at end of file
diff --git a/alacritty/src/window.rs b/alacritty/src/window.rs
index e43e5c95..1b9e7731 100644
--- a/alacritty/src/window.rs
+++ b/alacritty/src/window.rs
@@ -19,8 +19,15 @@ use {
     crate::wayland_theme::AlacrittyWaylandTheme,
 };
 
+#[rustfmt::skip]
 #[cfg(all(feature = "x11", not(any(target_os = "macos", windows))))]
-use x11_dl::xlib::{Display as XDisplay, PropModeReplace, XErrorEvent, Xlib};
+use {
+    std::io::Cursor,
+
+    x11_dl::xlib::{Display as XDisplay, PropModeReplace, XErrorEvent, Xlib},
+    glutin::window::Icon,
+    png::Decoder,
+};
 
 use std::fmt::{self, Display, Formatter};
 
@@ -44,11 +51,11 @@ use crate::config::window::{Decorations, WindowConfig};
 use crate::config::Config;
 use crate::gl;
 
-// It's required to be in this directory due to the `windows.rc` file.
+/// Window icon for `_NET_WM_ICON` property.
 #[cfg(all(feature = "x11", not(any(target_os = "macos", windows))))]
-static WINDOW_ICON: &[u8] = include_bytes!("../alacritty.ico");
+static WINDOW_ICON: &[u8] = include_bytes!("../alacritty.png");
 
-// This should match the definition of IDI_ICON from `windows.rc`.
+/// This should match the definition of IDI_ICON from `windows.rc`.
 #[cfg(windows)]
 const IDI_ICON: WORD = 0x101;
 
@@ -257,11 +264,11 @@ impl Window {
     pub fn get_platform_window(title: &str, window_config: &WindowConfig) -> WindowBuilder {
         #[cfg(feature = "x11")]
         let icon = {
-            let image = image::load_from_memory_with_format(WINDOW_ICON, image::ImageFormat::Ico)
-                .expect("loading icon")
-                .to_rgba();
-            let (width, height) = image.dimensions();
-            glutin::window::Icon::from_rgba(image.into_raw(), width, height)
+            let decoder = Decoder::new(Cursor::new(WINDOW_ICON));
+            let (info, mut reader) = decoder.read_info().expect("invalid embedded icon");
+            let mut buf = vec![0; info.buffer_size()];
+            let _ = reader.next_frame(&mut buf);
+            Icon::from_rgba(buf, info.width, info.height)
         };
 
         let class = &window_config.class;
diff --git a/extra/logo/compat/alacritty-term.png b/extra/logo/compat/alacritty-term.png
new file mode 100644
index 00000000..b8117882
--- /dev/null
+++ b/extra/logo/compat/alacritty-term.png