01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: /**
18: * @author Alexey A. Petrenko
19: * @version $Revision$
20: */package org.apache.harmony.awt.gl.windows;
21:
22: import java.awt.GraphicsDevice;
23: import java.awt.HeadlessException;
24:
25: import org.apache.harmony.awt.gl.CommonGraphicsEnvironment;
26: import org.apache.harmony.awt.wtk.WindowFactory;
27:
28: /**
29: * Windows GraphicsEnvironment implementation
30: *
31: */
32: public class WinGraphicsEnvironment extends CommonGraphicsEnvironment {
33: WinGraphicsDevice defaultDevice = null;
34: WinGraphicsDevice[] devices = null;
35:
36: static {
37: System.loadLibrary("gl"); //$NON-NLS-1$
38: }
39:
40: public WinGraphicsEnvironment(WindowFactory wf) {
41: }
42:
43: @Override
44: public GraphicsDevice getDefaultScreenDevice()
45: throws HeadlessException {
46: if (defaultDevice == null) {
47: WinGraphicsDevice[] dvcs = (WinGraphicsDevice[]) getScreenDevices();
48: for (WinGraphicsDevice element : dvcs) {
49: if (element.isDefaultDevice()) {
50: defaultDevice = element;
51: break;
52: }
53: }
54: }
55:
56: return defaultDevice;
57: }
58:
59: @Override
60: public GraphicsDevice[] getScreenDevices() throws HeadlessException {
61: if (devices == null) {
62: devices = enumerateDisplayDevices();
63: }
64:
65: return devices;
66: }
67:
68: /**
69: * Enumerates system displays
70: *
71: * @return Array of WinGraphicsDevice objects representing system displays
72: */
73: private native WinGraphicsDevice[] enumerateDisplayDevices();
74: }
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