From befd430e596dd18db8d0ee13a1d05aac197a9754 Mon Sep 17 00:00:00 2001
From: hexdec <hexdec@users.noreply.github.com>
Date: Mon, 11 Aug 2014 22:58:40 +0200
Subject: [PATCH] Decompiled window_zoom_in and window_zoom_out.

---
 src/window.c | 37 +++++++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

diff --git a/src/window.c b/src/window.c
index 3e34e4fd35..569463783c 100644
--- a/src/window.c
+++ b/src/window.c
@@ -909,7 +909,22 @@ void window_rotate_camera(rct_window *w)
  */
 void window_zoom_in(rct_window *w)
 {
-	RCT2_CALLPROC_X(0x006887A6, 0, 0, 0, 0, (int)w, 0, 0);
+	rct_viewport* v = w->viewport;
+	
+	// Prevent zooming more than possible.
+	if (v->zoom <= 0) {
+		return;
+	}
+
+	v->zoom--;
+
+	v->view_width /= 2;
+	v->view_height /= 2;
+
+	w->saved_view_x += v->view_width >> 1;
+	w->saved_view_y += v->view_height >> 1;
+
+	RCT2_CALLPROC_X(0x006EB13A, 0, 0, 0, 0, (int)w, 0, 0);
 }
 
 /**
@@ -918,7 +933,25 @@ void window_zoom_in(rct_window *w)
  */
 void window_zoom_out(rct_window *w)
 {
-	RCT2_CALLPROC_X(0x006887E0, 0, 0, 0, 0, (int)w, 0, 0);
+	rct_viewport* v = w->viewport;
+
+	// Prevent zooming more than possible.
+	if (v->zoom >= 3) {
+		return;
+	}
+
+	v->zoom++;
+
+	int width = v->view_width;
+	int height = v->view_height;
+	
+	v->view_width *= 2;
+	v->view_height *= 2;
+
+	w->saved_view_x -= width / 2;
+	w->saved_view_y -= height >> 1;
+
+	RCT2_CALLPROC_X(0x006EB13A, 0, 0, 0, 0, (int)w, 0, 0);
 }
 
 /**