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Deal gracefully with systems running with a headless AWT toolkit, or

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general failure to obtain the graphics environment or other video
information.


git-svn-id: https://samskivert.googlecode.com/svn/trunk@1019 6335cc39-0255-0410-8fd6-9bcaacd3b74c
This commit is contained in:
shaper
2003-01-15 01:27:44 +00:00
parent c8be8e49f7
commit 373b844cb2
1 changed files with 26 additions and 10 deletions
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projects/samskivert/src/java/com/samskivert/util/SystemInfo.java
+26 -10
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@@ -1,5 +1,5 @@
//
// $Id: SystemInfo.java,v 1.2 2003/01/14 22:31:27 shaper Exp $
// $Id: SystemInfo.java,v 1.3 2003/01/15 01:27:44 shaper Exp $
//
// samskivert library - useful routines for java programs
// Copyright (C) 2003 Walter Korman
@@ -59,6 +59,10 @@ public class SystemInfo
/** The maximum amount of memory available in kilobytes. */
public long maxMemory;
/** Whether the video display is headless or video information is
* unavailable. */
public boolean isHeadless;
/** The video display bit depth; see {@link DisplayMode}. */
public int bitDepth;
@@ -104,15 +108,23 @@ public class SystemInfo
maxMemory = rtime.maxMemory() / 1024;
// determine video display information
GraphicsEnvironment env =
GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = env.getDefaultScreenDevice();
DisplayMode mode = gd.getDisplayMode();
bitDepth = mode.getBitDepth();
refreshRate = mode.getRefreshRate() / 1024;
isFullScreen = (gd.getFullScreenWindow() != null);
displayWidth = mode.getWidth();
displayHeight = mode.getHeight();
isHeadless = GraphicsEnvironment.isHeadless();
if (!isHeadless) {
try {
GraphicsEnvironment env =
GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = env.getDefaultScreenDevice();
DisplayMode mode = gd.getDisplayMode();
bitDepth = mode.getBitDepth();
refreshRate = mode.getRefreshRate() / 1024;
isFullScreen = (gd.getFullScreenWindow() != null);
displayWidth = mode.getWidth();
displayHeight = mode.getHeight();
} catch (Throwable t) {
isHeadless = true;
}
}
}
/**
@@ -148,6 +160,10 @@ public class SystemInfo
*/
public String videoToString ()
{
if (isHeadless) {
return "headless or unavailable";
}
String sdepth = (bitDepth == -1) ? "unknown bit depth" :
bitDepth + "-bit";
String srate = (refreshRate == DisplayMode.REFRESH_RATE_UNKNOWN) ?