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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 jogamp.opengl;
import java.util.StringTokenizer;
import javax.media.opengl.GLContext;
import com.jogamp.common.util.VersionNumberString;
/**
* A class for storing and comparing OpenGL version numbers.
* This only works for desktop OpenGL at the moment.
*/
class GLVersionNumber extends VersionNumberString {
private final boolean valid;
private GLVersionNumber(int[] val, String versionString, boolean valid) {
super(val[0], val[1], val[2], versionString);
this.valid = valid;
}
public static GLVersionNumber create(String versionString) {
int[] val = new int[] { 0, 0, 0 };
try {
if (versionString.startsWith("GL_VERSION_")) {
StringTokenizer tok = new StringTokenizer(versionString, "_");
tok.nextToken(); // GL_
tok.nextToken(); // VERSION_
if (!tok.hasMoreTokens()) {
val[0] = 0;
} else {
val[0] = Integer.valueOf(tok.nextToken()).intValue();
if (!tok.hasMoreTokens()) {
val[1] = 0;
} else {
val[1] = Integer.valueOf(tok.nextToken()).intValue();
if (!tok.hasMoreTokens()) {
val[2] = 0;
} else {
val[2] = 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))) {
val[0] = Character.digit(versionString.charAt(0), radix);
val[1] = 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 == val[0] && altMinor > val[1]) || altMajor == val[0] + 1 ) {
if( GLContext.isValidGLVersion(altMajor, altMinor) ) {
val[0] = altMajor;
val[1] = altMinor;
}
}
}
}
}
}
}
}
return new GLVersionNumber(val, versionString, 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);
val[0] = 1;
val[1] = 0;
/*
throw (IllegalArgumentException)
new IllegalArgumentException(
"Illegally formatted version identifier: \"" + versionString + "\"")
.initCause(e);
*/
}
return new GLVersionNumber(val, versionString, false);
}
public final boolean isValid() {
return valid;
}
/**
* Returns the optional vendor version at the end of the
* <code>GL_VERSION</code> string if exists, otherwise the {@link VersionNumberString#zeroVersion zero version} instance.
* <pre>
* 2.1 Mesa 7.0.3-rc2 -> 7.0.3 (7.0.3-rc2)
* 4.2.12171 Compatibility Profile Context 9.01.8 -> 9.1.8 (9.01.8)
* 4.2.12198 Compatibility Profile Context 12.102.3.0 -> 12.102.3 (12.102.3.0)
* 4.3.0 NVIDIA 310.32 -> 310.32 (310.32)
* </pre>
*/
public static final VersionNumberString createVendorVersion(String versionString) {
if (versionString == null || versionString.length() <= 0) {
return null;
}
final String[] strings = versionString.trim().split("\\s+");
if ( strings.length <= 0 ) {
return null;
}
// Test all segments backwards from [len-1..1], skipping the 1st entry (GL version)
// If a segment represents a valid VersionNumber - use it.
for(int i=strings.length-1; i>=1; i--) {
final String s = strings[i];
final VersionNumberString version = new VersionNumberString(s, ".");
if( !version.isZero() ) {
return version;
}
}
return VersionNumberString.zeroVersion;
}
}
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