From 53c5df562b98b098bb5d36f2bc32748e97fb93eb Mon Sep 17 00:00:00 2001
From: Andrey Sidorov <sidorares@yandex.ru>
Date: Fri, 9 Sep 2011 10:04:19 +1000
Subject: [PATCH] initial big-reqests support

---
 lib/x11/corereqs.js         |  4 ++--
 lib/x11/ext/big-requests.js | 28 ++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 2 deletions(-)
 create mode 100644 lib/x11/ext/big-requests.js

diff --git a/lib/x11/corereqs.js b/lib/x11/corereqs.js
index 24773b9..3230b58 100644
--- a/lib/x11/corereqs.js
+++ b/lib/x11/corereqs.js
@@ -330,10 +330,10 @@ module.exports = {
       // format:  0 - Bitmap, 1 - XYPixmap, 2 - ZPixmap
       function(format, drawable, gc, width, height, dstX, dstY, leftPad, depth, data) {
           var padded = xutil.padded_length(data.length);
-          var reqLen = 6 + padded/4; // (length + 3) >> 2 ???
+          var reqLen = 7 + padded/4; // (length + 3) >> 2 ???
           var padLength = padded - data.length;
           var pad = new Buffer(padLength); // TODO: new pack format 'X' - skip amount of bytes supplied in numerical argument
-          return [ 'CCSLLSSssCCxxaa', [72, format, reqLen, drawable, gc, width, height, dstX, dstY, leftPad, depth, data, pad]];
+          return [ 'CCSLLLSSssCCxxaa', [72, format, 0, reqLen, drawable, gc, width, height, dstX, dstY, leftPad, depth, data, pad]];
       }
    ],
   
diff --git a/lib/x11/ext/big-requests.js b/lib/x11/ext/big-requests.js
new file mode 100644
index 0000000..a56d798
--- /dev/null
+++ b/lib/x11/ext/big-requests.js
@@ -0,0 +1,28 @@
+// http://www.x.org/releases/X11R7.6/doc/bigreqsproto/bigreq.html
+
+// TODO: move to templates
+exports.requireExt = function(display, callback) 
+{
+    var X = display.client;
+    X.QueryExtension('BIG_REQUESTS', function(ext) {  
+
+        if (!ext.present)
+            callback(new Error('extension not available'));
+
+        ext.Enable = function( callback )
+        {
+            X.seq_num++;
+            X.pack_stream.pack('CCSL', [ext.majorOpcode, 0, 1]);
+            X.replies[X.seq_num] = [
+                function(buf, opt) {
+                    // max packet size in reply
+                    console.log([buf, opt]);
+                },
+                callback
+            ];
+            X.pack_stream.flush();
+        }
+
+        callback(ext);
+    });
+}