From 491446d1c308a1b8f3d8b4ca7763299ffc0e1896 Mon Sep 17 00:00:00 2001
From: sbosse <sbosse@uni-bremen.de>
Date: Mon, 21 Jul 2025 23:06:47 +0200
Subject: [PATCH] Mon 21 Jul 22:43:21 CEST 2025

---
 js/x11/examples/screenshot.js | 87 +++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 js/x11/examples/screenshot.js

diff --git a/js/x11/examples/screenshot.js b/js/x11/examples/screenshot.js
new file mode 100644
index 0000000..2d7f366
--- /dev/null
+++ b/js/x11/examples/screenshot.js
@@ -0,0 +1,87 @@
+var x11 = require('../lib');
+var wid = process.argv[2];
+console.log(wid);
+
+x11.createClient(function(err, display) {
+    var X = display.client;
+    var root = display.screen[0].root;
+
+    var id = wid ? wid : root;
+    var gc = X.AllocID();
+    X.CreateGC(gc, id);
+    var width = 0;
+    var hwight = 0;
+    X.GetGeometry(id, function(err, clientGeom) {
+        width = clientGeom.width;
+        height = clientGeom.height;
+
+
+            var dispwin = X.AllocID();
+            X.CreateWindow(dispwin, root, 0, 0, width, height, 0, 0, 0, 0, { eventMask: x11.eventMask.Exposure });
+            X.MapWindow(dispwin);
+            //X.CopyArea(idScreenshot, dispwin, gc, 0, 0, 0, 0, width, height);
+
+
+        //var idScreenshot = X.AllocID();
+        //X.CreatePixmap(idScreenshot, root, 24, clientGeom.width, clientGeom.height);
+        // ask recursively each window to copy itself to pixmap
+
+        function drawWithKids(list, cb)
+        {
+            if (list.length == 0)
+                return cb();
+            var p = list.pop();
+            var win = p.win;
+            if (win == dispwin)
+                return drawWithKids(list, cb);
+
+            X.GetWindowAttributes(win, function(err, res) {
+                if (res[8] == 0)
+                    return drawWithKids(list, cb);
+                X.GetGeometry(win, function(err, geom) {
+                    // (srcDrawable, dstDrawable, gc, srcX, srcY, dstX, dstY, width, height)
+                    if (win != root)
+                        X.CopyArea(win, dispwin, gc, 0, 0, p.x + geom.xPos, p.y + geom.yPos, geom.width, geom.height);
+                    //X.CopyArea(win, idScreenshot, gc, 0, 0, p.x + geom.xPos, p.y + geom.yPos, geom.width, geom.height);
+                    X.QueryTree(win, function(tree) {
+                        tree.children.reverse().forEach(function(subwin) {
+                            list.push({win: subwin, x: p.x + geom.xPos, y: p.y + geom.yPos});
+                        });
+                        drawWithKids(list, cb);
+                    });
+                });
+            });
+        };
+
+        /*
+        //setInterval(function() {
+        var list = [{win: id, x: 0, y: 0}];
+        drawWithKids(list, function() {
+            // (format, drawable, x, y, width, height, planeMask)
+            //X.GetImage(2, dispwin, 0, 0, width, height, 0xffffffff, function(data) {
+            //X.GetImage(2, root, 0, 0, width, height, 0xffffffff, function(data) {
+            //    console.log(data);
+            //});
+            console.log('DONE! ready');
+            X.terminate();
+            //var dispwin = X.AllocID();
+            //X.CreateWindow(dispwin, root, 0, 0, width, height, 1, 1, 0, { eventMask: x11.eventMask.Exposure });
+            //X.MapWindow(dispwin);
+            //X.CopyArea(idScreenshot, dispwin, gc, 0, 0, 0, 0, width, height);
+
+        });
+        */
+        X.GetImage(2, id, 0, 0, width, height, 0xffffffff, function(err, image) {
+            if (err) {
+              console.log(err);
+              process.exit(1);
+            }
+            console.log(image);
+            // format, drawable, gc, width, height, dstX, dstY, leftPad, depth, data
+            X.PutImage(2, dispwin, gc, width, height, 0, 0, 0, 24, image.data);
+        });
+        //}, 1000);
+    });
+}).on('error', function(err) {
+    console.log(err);
+});