diff --git a/lib/minifb/src/minifb.zig b/lib/minifb/src/minifb.zig
index 75fb0cc..61187fc 100644
--- a/lib/minifb/src/minifb.zig
+++ b/lib/minifb/src/minifb.zig
@@ -85,6 +85,15 @@ pub fn Window(comptime TUserData: type) type {
         pub fn setActiveCallback(self: Window(TUserData), callback: ActiveFunc) void {
             c.mfb_set_active_callback(self.cwin, @ptrCast(c.mfb_active_func, callback));
         }
+
+        pub const ResizeFunc = fn (win: Window(TUserData), width: i32, height: i32) callconv(.C) void;
+        pub fn setResizeCallback(self: Window(TUserData), callback: ResizeFunc) void {
+            c.mfb_set_resize_callback(self.cwin, @ptrCast(c.mfb_resize_func, callback));
+        }
+
+        pub fn setViewport(self: Window(TUserData), offset_x: u32, offset_y: u32, width: u32, height: u32) bool {
+            return c.mfb_set_viewport(self.cwin, offset_x, offset_y, width, height);
+        }
     };
 }
 
diff --git a/src/main.zig b/src/main.zig
index c798de7..e82f824 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -106,6 +106,18 @@ fn handleActive(win: mfb.Window(State), isActive: bool) callconv(.C) void {
     }
 }
 
+fn handleResize(win: mfb.Window(State), width: i32, height: i32) callconv(.C) void {
+    const did_set = win.setViewport(
+        @intCast(u32, width) / 4,
+        @intCast(u32, height) / 4,
+        @intCast(u32, width) / 2,
+        @intCast(u32, height) / 2,
+        );
+    if (!did_set) {
+        std.log.warn("did not set viewport!", .{});
+    }
+}
+
 pub fn main() !void {
     var gp_allocator = std.heap.GeneralPurposeAllocator(.{}){};
     const alloc = gp_allocator.allocator();
@@ -118,6 +130,7 @@ pub fn main() !void {
     win.setUserData(&state);
 
     win.setActiveCallback(handleActive);
+    win.setResizeCallback(handleResize);
 
     var buf = try Buffer.init(alloc, Width, Height);
     defer buf.deinit();