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/**
* Copyright 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.opengl.impl;
import java.util.StringTokenizer;
import com.jogamp.common.util.VersionNumber;
/**
* A class for storing and comparing OpenGL version numbers.
* This only works for desktop OpenGL at the moment.
*/
class GLVersionNumber extends VersionNumber {
protected boolean valid;
public GLVersionNumber(int majorRev, int minorRev, int subMinorRev) {
super(majorRev, minorRev, subMinorRev);
valid = true;
}
public GLVersionNumber(String versionString) {
super();
valid = false;
try {
if (versionString.startsWith("GL_VERSION_")) {
StringTokenizer tok = new StringTokenizer(versionString, "_");
tok.nextToken(); // GL_
tok.nextToken(); // VERSION_
if (!tok.hasMoreTokens()) {
major = 0;
return;
}
major = Integer.valueOf(tok.nextToken()).intValue();
if (!tok.hasMoreTokens()) {
minor = 0;
return;
}
minor = Integer.valueOf(tok.nextToken()).intValue();
if (!tok.hasMoreTokens()) {
sub = 0;
return;
}
sub = Integer.valueOf(tok.nextToken()).intValue();
} else {
int radix = 10;
if (versionString.length() > 2) {
if (Character.isDigit(versionString.charAt(0)) && versionString.charAt(1) == '.' && Character.isDigit(versionString.charAt(2))) {
major = Character.digit(versionString.charAt(0), radix);
minor = Character.digit(versionString.charAt(2), radix);
// See if there's version-specific information which might
// imply a more recent OpenGL version
StringTokenizer tok = new StringTokenizer(versionString, " ");
if (tok.hasMoreTokens()) {
tok.nextToken();
if (tok.hasMoreTokens()) {
String token = tok.nextToken();
int i = 0;
while (i < token.length() && !Character.isDigit(token.charAt(i))) {
i++;
}
if (i < token.length() - 2 && Character.isDigit(token.charAt(i)) && token.charAt(i + 1) == '.' && Character.isDigit(token.charAt(i + 2))) {
int altMajor = Character.digit(token.charAt(i), radix);
int altMinor = Character.digit(token.charAt(i + 2), radix);
// Avoid possibly confusing situations by putting some
// constraints on the upgrades we do to the major and
// minor versions
if ((altMajor == major && altMinor > minor) || altMajor == major + 1) {
major = altMajor;
minor = altMinor;
}
}
}
}
}
}
}
valid = true;
} catch (Exception e) {
e.printStackTrace();
// FIXME: refactor desktop OpenGL dependencies and make this
// class work properly for OpenGL ES
System.err.println("Info: ExtensionAvailabilityCache: FunctionAvailabilityCache.Version.<init>: " + e);
major = 1;
minor = 0;
/*
throw (IllegalArgumentException)
new IllegalArgumentException(
"Illegally formatted version identifier: \"" + versionString + "\"")
.initCause(e);
*/
}
}
public final boolean isValid() {
return valid;
}
}
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