From aa5dc657fd1aec8a963a4d91f522152743639e4b Mon Sep 17 00:00:00 2001
From: Bill Currie <bill@taniwha.org>
Date: Sat, 6 Jan 2024 19:38:20 +0900
Subject: [PATCH] [ui] Add some basic math ops for view_pos_t

Just add and subtract, but I got tired of having to write two lines of
code for such.
---
 include/QF/ui/view.h | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/include/QF/ui/view.h b/include/QF/ui/view.h
index 6efe73747..ce8d5e161 100644
--- a/include/QF/ui/view.h
+++ b/include/QF/ui/view.h
@@ -138,6 +138,9 @@ typedef void (*view_move_f) (view_t view, view_pos_t abs);
 
 #define VIEWINLINE GNU89INLINE inline
 
+VIEWINLINE view_pos_t VP_add (view_pos_t a, view_pos_t b);
+VIEWINLINE view_pos_t VP_sub (view_pos_t a, view_pos_t b);
+
 VIEWINLINE view_t View_FromEntity (ecs_system_t viewsys, uint32_t ent);
 view_t View_New (ecs_system_t viewsys, view_t parent);
 view_t View_AddToEntity (uint32_t ent, ecs_system_t viewsys, view_t parent,
@@ -185,6 +188,24 @@ VIEWINLINE void View_SetOnMove (view_t view, view_move_f onmove);
 #define VIEWINLINE VISIBLE
 #endif
 
+VIEWINLINE view_pos_t
+VP_add (view_pos_t a, view_pos_t b)
+{
+	return (view_pos_t) {
+		.x = a.x + b.x,
+		.y = a.y + b.y,
+	};
+}
+
+VIEWINLINE view_pos_t
+VP_sub (view_pos_t a, view_pos_t b)
+{
+	return (view_pos_t) {
+		.x = a.x - b.x,
+		.y = a.y - b.y,
+	};
+}
+
 VIEWINLINE
 view_t
 View_FromEntity (ecs_system_t viewsys, uint32_t ent)