progress on terminal app

src/system/kernel/render.rs

@@ -52,6 +52,7 @@ pub enum RenderError {
     InvalidCharacter,
     InvalidColour,
     InvalidRenderMode,
+    Other(&'static str),
 }
 
 impl ScreenChar {
@@ -111,19 +112,16 @@ lazy_static! {
 
 impl Renderer {
     // EXTERNAL API : for use by standard library and other parts of the kernel
-    pub fn render_frame(&mut self, frame: [[ScreenChar; BUFFER_WIDTH]; BUFFER_HEIGHT]) { // renders the given frame to the app buffer
-        let mut processed_frame: [[ScreenChar; BUFFER_WIDTH]; BUFFER_HEIGHT] = [[ScreenChar::null(); BUFFER_WIDTH]; BUFFER_HEIGHT];
-
-        for (i, row) in frame.iter().enumerate() {
-            for (j, col) in row.iter().enumerate() {
-                processed_frame[i][j] = match special_char(col.character as char) {
-                    Some(c) => ScreenChar::new(c as u8, col.colour),
-                    None => *col,
-                };
+    pub fn render_frame(&mut self, mut frame: [[ScreenChar; BUFFER_WIDTH]; BUFFER_HEIGHT]) { // renders the given frame to the app buffer
+        for (i, row) in frame.iter_mut().enumerate() {
+            for (j, col) in row.iter_mut().enumerate() {
+                if let Some(c) = special_char(col.character as char) {
+                    col.character = c as u8;
+                }
             }
         }
 
-        self.app_buffer = processed_frame;
+        self.app_buffer = frame;
         self.internal_render();
     }