Restore font after mode change

vinc · Oct 14, 2024 · c5294e8 · c5294e8
1 parent 6f7096d
commit c5294e8
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Showing 3 changed files with 13 additions and 4 deletions.
diff --git a/src/api/vga/mod.rs b/src/api/vga/mod.rs
@@ -10,15 +10,14 @@ use crate::usr::shell;
 pub fn graphic_mode() {
     fs::write("/dev/vga/mode", b"320x200").ok();
 
-    // TODO: Backup font and palette
+    // TODO: Backup palette
 }
 
 pub fn text_mode() {
     fs::write("/dev/vga/mode", b"80x25").ok();
 
-    // TODO: Restore font and palette backup instead of this
+    // TODO: Restore and palette backup instead of this
     shell::exec("shell /ini/palettes/gruvbox-dark.sh").ok();
-    shell::exec("read /ini/fonts/zap-light-8x16.psf => /dev/vga/font").ok();
 
     print!("\x1b[2J\x1b[1;1H"); // Clear screen and move to top
 }
diff --git a/src/sys/vga/font.rs b/src/sys/vga/font.rs
@@ -4,6 +4,7 @@ use crate::api::font::Font;
 use crate::api::fs::{FileIO, IO};
 
 use core::convert::TryFrom;
+use spin::Mutex;
 use x86_64::instructions::interrupts;
 
 #[derive(Debug, Clone)]
@@ -22,6 +23,7 @@ impl FileIO for VgaFont {
 
     fn write(&mut self, buf: &[u8]) -> Result<usize, ()> {
         if let Ok(font) = Font::try_from(buf) {
+            *FONT.lock() = Some(font.clone());
             set_font(&font);
             Ok(buf.len()) // TODO: Use font.data.len() ?
         } else {
@@ -39,9 +41,16 @@ impl FileIO for VgaFont {
     }
 }
 
-// TODO: Remove this
+static FONT: Mutex<Option<Font>> = Mutex::new(None);
+
 pub fn set_font(font: &Font) {
     interrupts::without_interrupts(||
         WRITER.lock().set_font(font)
     )
 }
+
+pub fn restore_font() {
+    if let Some(ref font) = *FONT.lock() {
+        set_font(font);
+    }
+}
diff --git a/src/sys/vga/screen.rs b/src/sys/vga/screen.rs
@@ -125,6 +125,7 @@ pub fn set_80x25_mode() {
     set_mode(&T_80_25);
     disable_blinking();
     disable_underline();
+    font::restore_font();
 }
 
 pub fn set_320x200_mode() {