bflibrary: Fix mouse warping mode

The mode was damaged for some time, returning strange relative
positions. Now it should work as good as the direct coords mode.

The SDL2 also has a build-in relative mode, which allows to
achieve similar results without warping mouse; but that is
also capturing the mouse, while auto reset mode allows to
escape with fast mouse move.

Author: mefistotelis

bflibrary/src/x86-win-sdl/smouse.cpp

@@ -270,8 +270,11 @@ void MouseToScreen(struct TbPoint *pos)
       orig.x = pos->x;
       orig.y = pos->y;
 #if defined(LB_ENABLE_MOUSE_MOVE_RATIO)
-      pos->x = mx + ((pos->x - mx) * (long)lbDisplay.MouseMoveRatioX)/256;
-      pos->y = my + ((pos->y - my) * (long)lbDisplay.MouseMoveRatioY)/256;
+      pos->x = lbDisplay.MMouseX + ((pos->x - mx) * (long)lbDisplay.MouseMoveRatioX)/256;
+      pos->y = lbDisplay.MMouseY + ((pos->y - my) * (long)lbDisplay.MouseMoveRatioY)/256;
+#else
+      pos->x = lbDisplay.MMouseX + (pos->x - mx);
+      pos->y = lbDisplay.MMouseY + (pos->y - my);
 #endif
       mx = orig.x;
       my = orig.y;

bflibrary/src/x86-win-sdl2/smouse.cpp

@@ -271,8 +271,11 @@ void MouseToScreen(struct TbPoint *pos)
       orig.x = pos->x;
       orig.y = pos->y;
 #if defined(LB_ENABLE_MOUSE_MOVE_RATIO)
-      pos->x = mx + ((pos->x - mx) * (long)lbDisplay.MouseMoveRatioX)/256;
-      pos->y = my + ((pos->y - my) * (long)lbDisplay.MouseMoveRatioY)/256;
+      pos->x = lbDisplay.MMouseX + ((pos->x - mx) * (long)lbDisplay.MouseMoveRatioX)/256;
+      pos->y = lbDisplay.MMouseY + ((pos->y - my) * (long)lbDisplay.MouseMoveRatioY)/256;
+#else
+      pos->x = lbDisplay.MMouseX + (pos->x - mx);
+      pos->y = lbDisplay.MMouseY + (pos->y - my);
 #endif
       mx = orig.x;
       my = orig.y;