drivers: bootvid: Add BootVidClear() helper

Signed-off-by: Chloe M. <chloe@mensia.org>

paw/stos/drivers/bootvid/fbio.c

@@ -106,6 +106,18 @@ BootVidDeInitCons(VOID)
     BootConsEnabled = false;
 }
 
+
+VOID
+BootVidClear(ULONG Color)
+{
+    ULONG *Ptr;
+
+    Ptr = Framebuffer.Address;
+    for (USIZE Idx = 0; Idx < Framebuffer.Height * Framebuffer.Pitch; ++Idx) {
+        Ptr[Idx] = Color;
+    }
+}
+
 BOOLEAN
 BootVidConsEn(VOID)
 {

paw/stos/head/drivers/bootvid/fbio.h

@@ -47,6 +47,14 @@ VOID BootVidDeInitCons(VOID);
  */
 VOID BootVidConsWrite(const CHAR *String, USIZE Length);
 
+
+/*
+ * Clear the screen with a background color
+ *
+ * @Color: Color to fill
+ */
+VOID BootVidClear(ULONG Color);
+
 /*
  * Returns true if the boot console is enabled
  */