From 7d25fbcb144cf922bd4f2d770b375287d46a3ecf Mon Sep 17 00:00:00 2001
From: sbosse <sbosse@uni-bremen.de>
Date: Mon, 21 Jul 2025 23:02:17 +0200
Subject: [PATCH] Mon 21 Jul 22:43:21 CEST 2025

---
 js/x11/core/examples/simple/render.js | 33 +++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 js/x11/core/examples/simple/render.js

diff --git a/js/x11/core/examples/simple/render.js b/js/x11/core/examples/simple/render.js
new file mode 100644
index 0000000..c0f046f
--- /dev/null
+++ b/js/x11/core/examples/simple/render.js
@@ -0,0 +1,33 @@
+var x11 = require('../../lib');
+var PointerMotion = x11.eventMask.PointerMotion;
+
+var xclient = x11.createClient(function(err, display) {
+    var X = display.client;
+    var root = display.screen[0].root;
+    display.client.require('render', function(err, Render) {
+        var wid = X.AllocID();
+        var white = display.screen[0].white_pixel;
+        varblack = display.screen[0].black_pixel;
+        X.CreateWindow(wid, root, 10, 10, 400, 300, 0, 0, 0, 0, { backgroundPixel: white, eventMask: PointerMotion });
+        X.MapWindow(wid);
+
+        var pict = X.AllocID();
+        Render.CreatePicture(pict, wid, Render.rgb24);
+        var pictGrad = X.AllocID();
+        Render.RadialGradient(pictGrad, [26,26], [26,26], 0, 26,
+            [
+                [0,   [0,0,0,0x0fff ] ],
+                [0.3,   [0,0,0,0x0fff ] ],
+                [0.997,   [0xffff, 0xf, 0, 0x1] ],
+                [1,   [0xffff, 0xffff, 0, 0x0] ]
+            ]);
+
+        function draw(x, y) {
+            Render.Composite(3, pictGrad, 0, pict, 0, 0, 0, 0, x-26, y-26, 52, 52);
+        }
+
+        X.on('event', function(ev) {
+           draw(ev.x, ev.y);
+        });
+    });
+});