From 9e967b9734d65d7e24753ae2a285c454d8e96ff3 Mon Sep 17 00:00:00 2001
From: Svetlana Linuxenko <linuxenko@yahoo.com>
Date: Fri, 18 Nov 2016 14:50:10 +0200
Subject: [PATCH] GCFunction shortcuts

---
 examples/simple/gcinvert.js | 36 ++++++++++++++++++++++++++++++++++++
 lib/gcfunction.js           | 22 ++++++++++++++++++++++
 lib/index.js                |  5 +++++
 3 files changed, 63 insertions(+)
 create mode 100644 examples/simple/gcinvert.js
 create mode 100644 lib/gcfunction.js

diff --git a/examples/simple/gcinvert.js b/examples/simple/gcinvert.js
new file mode 100644
index 0000000..b9d5a82
--- /dev/null
+++ b/examples/simple/gcinvert.js
@@ -0,0 +1,36 @@
+/*
+ * GCFunction usage example
+ */
+var x11 = require('../../lib');
+
+x11.createClient(function(err, display) {
+  var X = display.client;
+  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, 0, 0, 400, 300, 0, 0, 0, 0, { 
+    backgroundPixel: black,
+    eventMask: x11.eventMask.ButtonPress|x11.eventMask.Exposure });
+  var gc = X.AllocID();
+  X.CreateGC(gc, wid, {foreground : white, 'function' : x11.gcFunction.GXinvert});
+  X.MapWindow(wid);
+
+
+  X.on('event', function(ev) {
+
+    if (ev.type === 12) {
+      X.PolyFillRectangle(wid, gc, [0, 0, 400, 300]);
+    }
+
+    if (ev.type === 4) {
+      var x = ev.x;
+      var y = ev.y;
+
+      X.PolyFillRectangle(wid, gc, [x - 25, y - 25, 50, 50]);
+    }
+
+  });
+});
+
diff --git a/lib/gcfunction.js b/lib/gcfunction.js
new file mode 100644
index 0000000..d57f10c
--- /dev/null
+++ b/lib/gcfunction.js
@@ -0,0 +1,22 @@
+/*
+ * GCFunction named shortcuts
+ */
+
+module.exports = {
+  GXclear        : 0x0,
+  GXand          : 0x1,
+  GXandReverse   : 0x2,
+  GXcopy         : 0x3,
+  GXandInverted  : 0x4,
+  GXnoop         : 0x5,
+  GXxor          : 0x6,
+  GXor           : 0x7,
+  GXnor          : 0x8,
+  GXequiv        : 0x9,
+  GXinvert       : 0xa,
+  GXorReverse    : 0xb,
+  GXcopyInverted : 0xc,
+  GXorInverted   : 0xd,
+  GXnand         : 0xe,
+  GXset          : 0xf
+};
\ No newline at end of file
diff --git a/lib/index.js b/lib/index.js
index b5b4af2..cab9d37 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -11,6 +11,11 @@ Object.defineProperty(module.exports, 'keySyms', {
   get: function() { return require('./keysyms'); }
 });
 
+Object.defineProperty(module.exports, 'gcFunction', {
+  enumerable: true,
+  get: function() { return require('./gcfunction'); }
+});
+
 //TODO:
 // keepe everything in namespace for consistensy (eventMask, keySyms, class, destination ...
 // or put most used constants to top namespace? (currently class and destination in top)