AllocColor request

lib/x11/corereqs.js

@@ -340,6 +340,20 @@ module.exports = {
        }
    ],
 
+   AllocColor: [
+       [ 'CxSLSSSxx', [84, 4] ], // params: colormap, red, green, blue
+
+       function(buf) {
+	   var res = buf.unpack('SSSxL');
+           var color = {};
+           color.red   = res[0];
+           color.blue  = res[1];
+           color.green = res[2];
+           color.pixel = res[3];
+           return color;
+       }   
+   ],
+   
    QueryExtension: [
        function(name) {
            var padded = xutil.padded_string(name);

test/alloccolor.js

@@ -0,0 +1,48 @@
+var x11 = require('../lib/x11');
+
+var xclient = x11.createClient();
+var Exposure = x11.eventMask.Exposure;
+var PointerMotion = x11.eventMask.PointerMotion;
+var pts = [];
+
+xclient.on('connect', function(display) {
+    var X = this;
+    var root = display.screen[0].root;
+    var white = display.screen[0].white_pixel;
+    var black = display.screen[0].black_pixel;
+
+    var wid = X.AllocID();
+    X.CreateWindow(
+       wid, root, 
+       10, 10, 400, 300, 
+       1, 1, 0,
+       { 
+           backgroundPixel: white, eventMask: Exposure|PointerMotion  
+       }
+    );
+    X.MapWindow(wid);
+  
+    var gc = X.AllocID();
+    X.AllocColor(display.screen[0].default_colormap, 0xffff, 0, 0, function(redcolor) {
+        // todo: it is possible for PolyLine to be called before CreateGC!
+        console.log(redcolor);
+        X.CreateGC(gc, wid, { foreground: redcolor.pixel, background: white } );
+    });
+    
+    X.on('event', function(ev) {
+        if (ev.type == 12)
+        {
+            if (pts.length > 4)
+                X.PolyLine(0, wid, gc, pts);
+        } else if (ev.type == 6) {
+            pts.push(ev.x);
+            pts.push(ev.y);
+            if (pts.length > 4)
+                X.PolyLine(0, wid, gc, pts.slice(-4));
+        }
+    });
+
+    X.on('error', function(e) {
+        console.log(e);
+    });
+});