Improve menu background when r_detail CVAR is low

While reverting previous changes...

releasenotes.md

@@ -25,7 +25,7 @@
   * The mouse wheel may now be used to scroll among menu items again.
   * If the mouse pointer is hidden, pressing a mouse button without moving the mouse now opens the menu from the title screen, or selects the currently highlighted item if the menu is open.
 * The fade effect when opening the menu is now slightly faster than closing it when the `fade` CVAR is `on`.
-* Minor improvements have been made to the menu’s background.
+* Minor improvements have been made to the menu’s background when the `r_detail` CVAR is `low`.
 * Two additional savegame slots are now available in the load and save game menus.
 * A random sound effect now plays when quitting the game by entering the `quit` CCMD in the console or pressing <kbd>ALT</kbd> + <kbd>F4</kbd>.
 * Improvements have been made to parsing [`BRGHTMPS`](https://raw.githubusercontent.com/bradharding/doomretro/master/res/BRGHTMPS) lumps.

src/m_menu.c

@@ -523,23 +523,6 @@ void M_DrawMenuBackground(void)
         return;
     }
 
-    if (r_detail == r_detail_high || !r_supersampling)
-        for (int y = 0; y < SCREENAREA; y += 2 * SCREENWIDTH)
-            for (int x = 0; x < SCREENWIDTH; x += 2)
-            {
-                byte        *dot1 = *screens + y + x;
-                byte        *dot2 = dot1 + 1;
-                byte        *dot3 = dot2 + SCREENWIDTH;
-                byte        *dot4 = dot3 - 1;
-                const byte  color = tinttab50[(tinttab50[(*dot1 << 8) + *dot2] << 8)
-                                + tinttab50[(*dot3 << 8) + *dot4]];
-
-                *dot1 = color;
-                *dot2 = color;
-                *dot3 = color;
-                *dot4 = color;
-            }
-
     if (gametime != blurtic)
     {
         for (int y = 2 * SCREENWIDTH; y < SCREENAREA; y += 4 * SCREENWIDTH)

src/v_video.c

@@ -1693,6 +1693,24 @@ void GetPixelSize(void)
     }
 }
 
+void V_LowGraphicDetail_Menu(void)
+{
+    for (int y = 0; y < SCREENAREA; y += 2 * SCREENWIDTH)
+        for (int x = 0; x < SCREENWIDTH; x += 2)
+        {
+            byte        *dot1 = *screens + y + x;
+            byte        *dot2 = dot1 + 1;
+            byte        *dot3 = dot2 + SCREENWIDTH;
+            byte        *dot4 = dot3 - 1;
+            const byte  color = tinttab50[(tinttab50[(*dot1 << 8) + *dot2] << 8) + tinttab50[(*dot3 << 8) + *dot4]];
+
+            *dot1 = color;
+            *dot2 = color;
+            *dot3 = color;
+            *dot4 = color;
+        }
+}
+
 void V_InvertScreen(void)
 {
     const int           width = viewwindowx + viewwidth;

src/v_video.h

@@ -135,6 +135,7 @@ void V_DrawPagePatch(int screen, patch_t *patch);
 void V_DrawPixel(int x, int y, byte color, bool drawshadow);
 
 void GetPixelSize(void);
+void V_LowGraphicDetail_Menu(void);
 void V_InvertScreen(void);
 
 bool V_ScreenShot(void);