windows: Introduce Direct Write (#10119)

This PR brings `Direct Write` to Zed. Now, Zed first trys to query
dwrite interface, if not supported, which means runing on Windows below
win10 1703), will choose `cosmic` as a fallback text system.

This direct write text system supports:
- Full font features support
- Emoji support
- Default system fonts as fallback

### Font features


https://github.com/zed-industries/zed/assets/14981363/198eff88-47df-4bc8-a257-e3acf81fd61d

### Emoji

![Screenshot 2024-04-03
211354](https://github.com/zed-industries/zed/assets/14981363/a5bc5845-42e8-4af1-af7e-abba598c1e72)

**Note: input emoji through IME or IMM not working yet, copy paste emoji
works fine (will be fixed by #10125 )**

### Font fallback

I use `Zed mono` which dose not support chinese chars to test font
fallback



https://github.com/zed-industries/zed/assets/14981363/c97d0847-0ac5-47e6-aa00-f3ce6d1e50a5



Release Notes:

- N/A

Cargo.toml

@@ -260,7 +260,9 @@ futures-batch = "0.6.1"
 futures-lite = "1.13"
 git2 = { version = "0.18", default-features = false }
 globset = "0.4"
-heed = { git = "https://github.com/meilisearch/heed", rev = "036ac23f73a021894974b9adc815bc95b3e0482a", features = ["read-txn-no-tls"] }
+heed = { git = "https://github.com/meilisearch/heed", rev = "036ac23f73a021894974b9adc815bc95b3e0482a", features = [
+    "read-txn-no-tls",
+] }
 hex = "0.4.3"
 ignore = "0.4.22"
 indoc = "1"
@@ -365,10 +367,16 @@ sys-locale = "0.3.1"
 version = "0.53.0"
 features = [
     "implement",
+    "Foundation_Numerics",
     "Wdk_System_SystemServices",
     "Win32_Globalization",
+    "Win32_Graphics_Direct2D",
+    "Win32_Graphics_Direct2D_Common",
     "Win32_Graphics_DirectWrite",
+    "Win32_Graphics_Dxgi_Common",
     "Win32_Graphics_Gdi",
+    "Win32_Graphics_Imaging",
+    "Win32_Graphics_Imaging_D2D",
     "Win32_Media",
     "Win32_Security",
     "Win32_Security_Credentials",

crates/gpui/src/platform/test/platform.rs

@@ -125,8 +125,11 @@ impl Platform for TestPlatform {
         #[cfg(target_os = "macos")]
         return Arc::new(crate::platform::mac::MacTextSystem::new());
 
-        #[cfg(not(target_os = "macos"))]
+        #[cfg(target_os = "linux")]
         return Arc::new(crate::platform::cosmic_text::CosmicTextSystem::new());
+
+        #[cfg(target_os = "windows")]
+        return Arc::new(crate::platform::windows::DirectWriteTextSystem::new().unwrap());
     }
 
     fn run(&self, _on_finish_launching: Box<dyn FnOnce()>) {

crates/gpui/src/platform/windows.rs

@@ -1,9 +1,11 @@
+mod direct_write;
 mod dispatcher;
 mod display;
 mod platform;
 mod util;
 mod window;
 
+pub(crate) use direct_write::*;
 pub(crate) use dispatcher::*;
 pub(crate) use display::*;
 pub(crate) use platform::*;

crates/gpui/src/platform/windows/platform.rs

@@ -57,7 +57,7 @@ pub(crate) struct WindowsPlatformInner {
     background_executor: BackgroundExecutor,
     pub(crate) foreground_executor: ForegroundExecutor,
     main_receiver: flume::Receiver<Runnable>,
-    text_system: Arc<CosmicTextSystem>,
+    text_system: Arc<dyn PlatformTextSystem>,
     callbacks: Mutex<Callbacks>,
     pub raw_window_handles: RwLock<SmallVec<[HWND; 4]>>,
     pub(crate) dispatch_event: OwnedHandle,
@@ -155,7 +155,13 @@ impl WindowsPlatform {
         let dispatcher = Arc::new(WindowsDispatcher::new(main_sender, dispatch_event.to_raw()));
         let background_executor = BackgroundExecutor::new(dispatcher.clone());
         let foreground_executor = ForegroundExecutor::new(dispatcher);
-        let text_system = Arc::new(CosmicTextSystem::new());
+        let text_system = if let Some(direct_write) = DirectWriteTextSystem::new().log_err() {
+            log::info!("Using direct write text system.");
+            Arc::new(direct_write) as Arc<dyn PlatformTextSystem>
+        } else {
+            log::info!("Using cosmic text system.");
+            Arc::new(CosmicTextSystem::new()) as Arc<dyn PlatformTextSystem>
+        };
         let callbacks = Mutex::new(Callbacks::default());
         let raw_window_handles = RwLock::new(SmallVec::new());
         let settings = RefCell::new(WindowsPlatformSystemSettings::new());

crates/gpui/src/text_system/font_features.rs

@@ -26,6 +26,29 @@ macro_rules! create_definitions {
                     }
                 }
             )*
+
+            /// Get the tag name list of the font OpenType features
+            /// only enabled or disabled features are returned
+            #[cfg(target_os = "windows")]
+            pub fn tag_value_list(&self) -> Vec<(String, bool)> {
+                let mut result = Vec::new();
+                $(
+                    {
+                        let value = if (self.enabled & (1 << $idx)) != 0 {
+                            Some(true)
+                        } else if (self.disabled & (1 << $idx)) != 0 {
+                            Some(false)
+                        } else {
+                            None
+                        };
+                        if let Some(enable) = value {
+                            let tag_name = stringify!($name).to_owned();
+                            result.push((tag_name, enable));
+                        }
+                    }
+                )*
+                result
+            }
         }
 
         impl std::fmt::Debug for FontFeatures {
@@ -94,9 +117,11 @@ macro_rules! create_definitions {
                 let mut map = serializer.serialize_map(None)?;
 
                 $(
-                    let feature = stringify!($name);
-                    if let Some(value) = self.$name() {
-                        map.serialize_entry(feature, &value)?;
+                    {
+                        let feature = stringify!($name);
+                        if let Some(value) = self.$name() {
+                            map.serialize_entry(feature, &value)?;
+                        }
                     }
                 )*
 
@@ -161,5 +186,5 @@ create_definitions!(
     (swsh, 30),
     (titl, 31),
     (tnum, 32),
-    (zero, 33)
+    (zero, 33),
 );