Add console header line

src/hulk/console.d

@@ -5,6 +5,9 @@ module hulk.console;
 
 import hulk.fb;
 import hulk.kfont;
+import hulk.ver;
+import hulk.rtc;
+import hulk.writef;
 
 /**
  * Represent the HULK console.
@@ -13,6 +16,8 @@ import hulk.kfont;
  */
 struct Console
 {
+    private enum BORDER_COLOR = 0xFF8000u;
+
     /** Console width in text columns. */
     private static __gshared size_t m_width;
 
@@ -30,8 +35,9 @@ struct Console
      */
     public static void initialize()
     {
+        size_t fb_console_height = Fb.height - Kfont.line_height - 1;
         m_width = Fb.width / Kfont.advance;
-        m_height = Fb.height / Kfont.line_height;
+        m_height = fb_console_height / Kfont.line_height;
     }
 
     /**
@@ -42,6 +48,7 @@ struct Console
         Fb.clear();
         m_x = 0u;
         m_y = 0u;
+        draw_header();
     }
 
     /**
@@ -77,16 +84,28 @@ struct Console
     }
 
     /**
-     * Render a character.
+     * Render a character using console characters.
      *
      * @param x X position.
      * @param y Y position.
      * @param ch Character to render.
      */
     private static void render_char(size_t x, size_t y, char ch)
+    {
+        render_char_fb(fb_x(x), fb_y(y), ch);
+    }
+
+    /**
+     * Render a character using framebuffer coordinates.
+     *
+     * @param x X position.
+     * @param y Y position.
+     * @param ch Character to render.
+     */
+    private static void render_char_fb(size_t x, size_t y, char ch)
     {
         const(CharInfo) * ci = &Kfont.chars[ch];
-        Fb.blit_alpha_bitmap(fb_x(x) + ci.left, fb_y(y) + ci.top, ci.bitmap, ci.width, ci.height);
+        Fb.blit_alpha_bitmap(x + ci.left, y + ci.top, ci.bitmap, ci.width, ci.height);
     }
 
     /**
@@ -102,6 +121,38 @@ struct Console
      */
     private static size_t fb_y(size_t y)
     {
-        return y * Kfont.line_height;
+        return (y + 1) * Kfont.line_height + 1;
+    }
+
+    /**
+     * Draw console header line.
+     */
+    private static draw_header()
+    {
+        static __gshared string header_text = "Welcome to HOS v" ~ VERSION ~ "!";
+        Fb.rect(0u, Kfont.line_height, Fb.width, 1, BORDER_COLOR);
+        size_t x = 0;
+        foreach (c; header_text)
+        {
+            render_char_fb(fb_x(x), 0, c);
+            x++;
+        }
+        update_header();
+    }
+
+    /**
+     * Update console header.
+     */
+    public static update_header()
+    {
+        __gshared uint x;
+        x = Fb.width - 8 * Kfont.advance;
+        Fb.rect(x - 1, 0, 1, Kfont.line_height, BORDER_COLOR);
+        Fb.rect(x, 0, Fb.width - x, Kfont.line_height, 0);
+        Rtc.time rtc_time = Rtc.read_rtc_time();
+        writef(function(ubyte ch) {
+                render_char_fb(x, 0, ch);
+                x += Kfont.advance;
+                }, "%02u:%02u:%02u", rtc_time.hour, rtc_time.minute, rtc_time.second);
     }
 }