Fix touchscreen input related functions on Android (#2702)

Fix display -> screen coordinate conversion for android platform and
move it to the platform event handling code, simplifying
GetTouchPosition() function implementation.

Co-authored-by: Denis Pobedrya <denis.pobedrya@gmail.com>

src/rcore.c

@@ -3835,22 +3835,7 @@ Vector2 GetTouchPosition(int index)
     // https://docs.microsoft.com/en-us/windows/win32/wintouch/getting-started-with-multi-touch-messages
     if (index == 0) position = GetMousePosition();
 #endif
-#if defined(PLATFORM_ANDROID)
-    if (index < MAX_TOUCH_POINTS) position = CORE.Input.Touch.position[index];
-    else TRACELOG(LOG_WARNING, "INPUT: Required touch point out of range (Max touch points: %i)", MAX_TOUCH_POINTS);
-
-    if ((CORE.Window.screen.width > CORE.Window.display.width) || (CORE.Window.screen.height > CORE.Window.display.height))
-    {
-        position.x = position.x*((float)CORE.Window.screen.width/(float)(CORE.Window.display.width - CORE.Window.renderOffset.x)) - CORE.Window.renderOffset.x/2;
-        position.y = position.y*((float)CORE.Window.screen.height/(float)(CORE.Window.display.height - CORE.Window.renderOffset.y)) - CORE.Window.renderOffset.y/2;
-    }
-    else
-    {
-        position.x = position.x*((float)CORE.Window.render.width/(float)CORE.Window.display.width) - CORE.Window.renderOffset.x/2;
-        position.y = position.y*((float)CORE.Window.render.height/(float)CORE.Window.display.height) - CORE.Window.renderOffset.y/2;
-    }
-#endif
-#if defined(PLATFORM_WEB) || defined(PLATFORM_RPI) || defined(PLATFORM_DRM)
+#if defined(PLATFORM_ANDROID) || defined(PLATFORM_WEB) || defined(PLATFORM_RPI) || defined(PLATFORM_DRM)
     if (index < MAX_TOUCH_POINTS) position = CORE.Input.Touch.position[index];
     else TRACELOG(LOG_WARNING, "INPUT: Required touch point out of range (Max touch points: %i)", MAX_TOUCH_POINTS);
 #endif
@@ -5675,9 +5660,11 @@ static int32_t AndroidInputCallback(struct android_app *app, AInputEvent *event)
         // Register touch points position
         CORE.Input.Touch.position[i] = (Vector2){ AMotionEvent_getX(event, i), AMotionEvent_getY(event, i) };
 
-        // Normalize CORE.Input.Touch.position[x] for screenWidth and screenHeight
-        CORE.Input.Touch.position[i].x /= (float)GetScreenWidth();
-        CORE.Input.Touch.position[i].y /= (float)GetScreenHeight();
+        // Normalize CORE.Input.Touch.position[i] for CORE.Window.screen.width and CORE.Window.screen.height
+        float widthRatio = (float)(CORE.Window.screen.width + CORE.Window.renderOffset.x) / (float)CORE.Window.display.width;
+        float heightRatio = (float)(CORE.Window.screen.height + CORE.Window.renderOffset.y) / (float)CORE.Window.display.height;
+        CORE.Input.Touch.position[i].x = CORE.Input.Touch.position[i].x * widthRatio - (float)CORE.Window.renderOffset.x / 2;
+        CORE.Input.Touch.position[i].y = CORE.Input.Touch.position[i].y * heightRatio - (float)CORE.Window.renderOffset.y / 2;
     }
 
     int32_t action = AMotionEvent_getAction(event);