[FREELDR:XBOX/UEFI] Separate framebuffer functions with those pertaining to emulated text console (reactos#8530)

- Framebuffer routines that output characters with text-like attributes,
  or return screen sizes in character units (columns/rows), pertain to a
  "framebuffer console" (FbCons) layer.
  Their interface may be extended a bit in the future.

- Add Doxygen documentation for some of them.

- The Xbox/UefiVideo* functions that are similarly character-oriented,
  invoke these framebuffer console routines.

Author: HBelusca

boot/freeldr/freeldr/arch/i386/xbox/xboxcons.c

@@ -36,7 +36,7 @@ XboxConsPutChar(int c)
     NeedScroll = (CurrentCursorY >= Height);
     if (NeedScroll)
     {
-        VidFbScrollUp(CurrentAttr);
+        FbConsScrollUp(CurrentAttr);
         --CurrentCursorY;
     }
 

boot/freeldr/freeldr/arch/i386/xbox/xboxvideo.c

@@ -36,13 +36,13 @@ extern multiboot_info_t * MultibootInfoPtr;
 VOID
 XboxVideoClearScreen(UCHAR Attr)
 {
-    VidFbClearScreen(Attr);
+    FbConsClearScreen(Attr);
 }
 
 VOID
 XboxVideoPutChar(int Ch, UCHAR Attr, unsigned X, unsigned Y)
 {
-    VidFbPutChar(Ch, Attr, X, Y);
+    FbConsPutChar(Ch, Attr, X, Y);
 }
 
 static UCHAR
@@ -149,13 +149,13 @@ XboxVideoSetDisplayMode(PCSTR DisplayMode, BOOLEAN Init)
 VOID
 XboxVideoGetDisplaySize(PULONG Width, PULONG Height, PULONG Depth)
 {
-    VidFbGetDisplaySize(Width, Height, Depth);
+    FbConsGetDisplaySize(Width, Height, Depth);
 }
 
 ULONG
 XboxVideoGetBufferSize(VOID)
 {
-    return VidFbGetBufferSize();
+    return FbConsGetBufferSize();
 }
 
 VOID
@@ -179,7 +179,7 @@ XboxVideoHideShowTextCursor(BOOLEAN Show)
 VOID
 XboxVideoCopyOffScreenBufferToVRAM(PVOID Buffer)
 {
-    VidFbCopyOffScreenBufferToVRAM(Buffer);
+    FbConsCopyOffScreenBufferToVRAM(Buffer);
 }
 
 BOOLEAN

boot/freeldr/freeldr/arch/uefi/ueficon.c

@@ -34,7 +34,7 @@ UefiConsPutChar(int c)
     NeedScroll = (CurrentCursorY >= Height);
     if (NeedScroll)
     {
-        VidFbScrollUp(CurrentAttr);
+        FbConsScrollUp(CurrentAttr);
         --CurrentCursorY;
     }
     if (c == '\r')

boot/freeldr/freeldr/arch/uefi/uefivid.c

@@ -73,19 +73,19 @@ UefiInitializeVideo(VOID)
 VOID
 UefiVideoClearScreen(UCHAR Attr)
 {
-    VidFbClearScreen(Attr);
+    FbConsClearScreen(Attr);
 }
 
 VOID
 UefiVideoPutChar(int Ch, UCHAR Attr, unsigned X, unsigned Y)
 {
-    VidFbPutChar(Ch, Attr, X, Y);
+    FbConsPutChar(Ch, Attr, X, Y);
 }
 
 VOID
 UefiVideoGetDisplaySize(PULONG Width, PULONG Height, PULONG Depth)
 {
-    VidFbGetDisplaySize(Width, Height, Depth);
+    FbConsGetDisplaySize(Width, Height, Depth);
 }
 
 VIDEODISPLAYMODE
@@ -98,13 +98,13 @@ UefiVideoSetDisplayMode(PCSTR DisplayMode, BOOLEAN Init)
 ULONG
 UefiVideoGetBufferSize(VOID)
 {
-    return VidFbGetBufferSize();
+    return FbConsGetBufferSize();
 }
 
 VOID
 UefiVideoCopyOffScreenBufferToVRAM(PVOID Buffer)
 {
-    VidFbCopyOffScreenBufferToVRAM(Buffer);
+    FbConsCopyOffScreenBufferToVRAM(Buffer);
 }
 
 VOID