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XRender QueryFilters example

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sidorares 2011-08-02 17:17:53 +10:00
parent 501cc67fce
commit 5c37ae5bbb
1 changed files with 66 additions and 0 deletions
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test/test_ext_render.js Normal file
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var x11 = require('../lib/x11');
// adding XRender functions manually from
// http://cgit.freedesktop.org/xcb/proto/tree/src/render.xml?id=HEAD
// and http://www.x.org/releases/X11R7.6/doc/renderproto/renderproto.txt
// TODO: move to templates
x11.createClient(
function(display) {
var X = display.client;
X.QueryExtension('RENDER', function(ext) {
function RenderQueryVersion(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();
}
function RenderQueryFilters(callback)
{
X.seq_num++;
X.pack_stream.pack('CCSL', [ext.majorOpcode, 29, 2, display.screen[0].root]);
X.replies[X.seq_num] = [
function(buf, opt) {
var h = buf.unpack('LL');
var num_aliases = h[0];
var num_filters = h[1];
var aliases = [];
var offset = 24; // LL + 16 bytes pad
for (var i=0; i < num_aliases; ++i)
{
aliases.push(buf.unpack('S', offset)[0]);
offset+=2;
}
var filters = [];
for (var i=0; i < num_filters; ++i)
{
var len = buf.unpack('C', offset)[0];
//if (!len) break;
offset++;
filters.push(buf.toString('ascii', offset, offset+len));
offset+=len;
}
return [aliases, filters];
},
callback
];
X.pack_stream.flush();
}
RenderQueryVersion(0,9, function(serverVersion) { console.log(serverVersion); });
RenderQueryFilters(function(resp) { console.log(resp); });
});
}
).on('error', function(err) {
console.log(err);
});