initiall support for RANDR extension

examples/smoketest/randr.js

@@ -0,0 +1,15 @@
+var x11 = require('../../lib');
+
+x11.createClient(function(err, display) {
+    var X = display.client;
+    var root = display.screen[0].root;
+    X.require('randr', function(Randr) {
+        //console.log(Randr);
+        //Randr.QueryVersion(1, 4, console.log);
+        Randr.SelectInput(root, Randr.NotifyMask.ScreenChange);
+        X.on('event', function(ev) {
+          console.log(ev);
+        });
+    });
+    X.on('error', function(err) { console.log(err); });
+});

lib/ext/randr.js

@@ -0,0 +1,75 @@
+// http://www.x.org/releases/X11R7.6/doc/randrproto/randrproto.txt
+
+var x11 = require('..');
+// TODO: move to templates
+
+exports.requireExt = function(display, callback) 
+{
+    var X = display.client;
+    X.QueryExtension('RANDR', function(err, ext) {  
+        debugger;
+
+        if (!ext.present)
+            return callback(new Error('extension not available'));
+
+        //ext.ReportLevel	= { 
+        //};
+
+        ext.QueryVersion = function(clientMaj, clientMin, callback)
+        {
+            X.seq_num++;
+            X.pack_stream.pack('CCSLL', [ext.majorOpcode, 0, 3, clientMaj, clientMin]);
+            X.replies[X.seq_num] = [
+                function(buf, opt) {
+                    var res = buf.unpack('LL');
+                    return res;
+                },
+                callback
+            ];
+            X.pack_stream.flush();
+        },
+
+        ext.events = {
+            RRScreenChangeNotify: 0
+        },
+
+        ext.NotifyMask = {
+            ScreenChange: 1,
+            CrtcChange: 2,
+            OutputChange: 4,
+            OutputProperty: 8,
+            All: 15
+        };
+
+        ext.SelectInput = function(mask)
+        {
+            X.seq_num++;
+            X.pack_stream.pack('CCSL', [ext.majorOpcode, 6, 2, mask]);
+            X.pack_stream.flush();
+        },
+
+        X.eventParsers[ext.firstEvent + ext.events.RRScreenChangeNotify] = function(type, seq, extra, code, raw) 
+        {
+            var event = {};
+            event.level = code;
+            event.seq = seq;
+            event.rotation = extra; // always 0
+            var values = raw.unpack('LLLLSSSSSS');
+            event.time = values[0];
+            event.configtime = values[1];
+            event.root = values[2];
+            event.requestWindow = values[3];
+            event.sizeId = values[4];
+            event.subpixelOrder = values[5];
+            event.width = values[6];
+            event.height = values[7];
+            event.physWidth = values[8];
+            event.physHeight = values[9];
+
+            event.name = 'RRScreenChangeNotify';
+            return event;
+        };
+
+        callback(ext);
+    });
+}