rosalina: add brightness control menu

sysmodules/rosalina/include/draw.h

@@ -54,6 +54,9 @@
 #define GPU_TRANSFER_CNT            REG32(0x10400C18)
 #define GPU_CMDLIST_CNT             REG32(0x104018F0)
 
+#define LCD_TOP_BRIGHTNESS          REG32(0x10202240)
+#define LCD_BOT_BRIGHTNESS          REG32(0x10202A40)
+
 #define FB_BOTTOM_VRAM_ADDR         ((void *)0x1F48F000) // cached
 #define FB_BOTTOM_VRAM_PA           0x1848F000
 #define FB_BOTTOM_SIZE              (320 * 240 * 2)

sysmodules/rosalina/include/menu.h

@@ -60,6 +60,7 @@ typedef struct Menu {
     MenuItem items[0x40];
 } Menu;
 
+extern bool isN3DS;
 extern bool menuShouldExit;
 extern bool preTerminationRequested;
 extern Handle preTerminationEvent;

sysmodules/rosalina/include/menus.h

@@ -33,6 +33,7 @@
 extern Menu rosalinaMenu;
 
 void RosalinaMenu_TakeScreenshot(void);
+void RosalinaMenu_ChangeScreenBrightness(void);
 void RosalinaMenu_ShowCredits(void);
 void RosalinaMenu_ProcessList(void);
 void RosalinaMenu_PowerOff(void);

sysmodules/rosalina/include/process_patches.h

@@ -30,3 +30,4 @@
 #include "menu.h"
 
 Result OpenProcessByName(const char *name, Handle *h);
+Result PatchProcessByName(const char *name, Result (*func)(u32 size));