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/**
* Copyright 2012 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 javax.media.nativewindow;
import java.util.Comparator;
/**
* Visual ID holder interface.
* <p>
* Allows queries of different types of native visual IDs,
* see {@link #getVisualID(int)}.
* </p>
*/
public interface VisualIDHolder {
public enum VIDType {
// Generic Values
INTRINSIC(0), NATIVE(1),
// EGL Values
EGL_CONFIG(10),
// X11 Values
X11_XVISUAL(20), X11_FBCONFIG(21),
// Windows Values
WIN32_PFD(30);
public final int id;
VIDType(int id){
this.id = id;
}
}
/**
* Returns the native visual ID of the given <code>type</code>
* if supported, or {@link #VID_UNDEFINED} if not supported.
* <p>
* Depending on the native windowing system, <code>type</code> is handled as follows:
* <ul>
* <li>X11 throws NativeWindowException on <code>EGL_CONFIG</code>, <code>WIN32_PFD</code>
* <ul>
* <li><code>INTRINSIC</code>: <i>X11 XVisual ID</i></li>
* <li><code>NATIVE</code>: <i>X11 XVisual ID</i></li>
* <li><code>X11_XVISUAL</code>: <i>X11 XVisual ID</i></li>
* <li><code>X11_FBCONFIG</code>: <code>VID_UNDEFINED</code></li>
* </ul></li>
* <li>X11/GL throws NativeWindowException on <code>EGL_CONFIG</code>, <code>WIN32_PFD</code>
* <ul>
* <li><code>INTRINSIC</code>: <i>X11 XVisual ID</i></li>
* <li><code>NATIVE</code>: <i>X11 XVisual ID</i></li>
* <li><code>X11_XVISUAL</code>: <i>X11 XVisual ID</i></li>
* <li><code>X11_FBCONFIG</code>: <i>X11 FBConfig ID</i> or <code>VID_UNDEFINED</code></li>
* </ul></li>
* <li>Windows/GL throws NativeWindowException on <code>EGL_CONFIG</code>, <code>X11_XVISUAL</code>, <code>X11_FBCONFIG</code>
* <ul>
* <li><code>INTRINSIC</code>: <i>Win32 PIXELFORMATDESCRIPTOR ID</i></li>
* <li><code>NATIVE</code>: <i>Win32 PIXELFORMATDESCRIPTOR ID</i></li>
* <li><code>WIN32_PFD</code>: <i>Win32 PIXELFORMATDESCRIPTOR ID</i></li>
* </ul></li>
* <li>EGL/GL throws NativeWindowException on <code>X11_XVISUAL</code>, <code>X11_FBCONFIG</code>, <code>WIN32_PFD</code>
* <ul>
* <li><code>INTRINSIC</code>: <i>EGL Config ID</i></li>
* <li><code>NATIVE</code>: <i>EGL NativeVisual ID</i> (<i>X11 XVisual ID</i>, <i>Win32 PIXELFORMATDESCRIPTOR ID</i>, ...)</li>
* <li><code>EGL_CONFIG</code>: <i>EGL Config ID</i></li>
* </ul></li>
* </ul>
* </p>
* Note: <code>INTRINSIC</code> and <code>NATIVE</code> are always handled,
* but may result in {@link #VID_UNDEFINED}. The latter is true if
* the native value are actually undefined or the corresponding object is not
* mapped to a native visual object.
*
* @throws NativeWindowException if <code>type</code> is neither
* <code>INTRINSIC</code> nor <code>NATIVE</code>
* and does not match the native implementation.
*/
int getVisualID(VIDType type) throws NativeWindowException ;
/**
* {@link #getVisualID(VIDType)} result indicating an undefined value,
* which could be cause by an unsupported query.
* <p>
* We assume the const value <code>0</code> doesn't reflect a valid native visual ID
* and is interpreted as <i>no value</i> on all platforms.
* This is currently true for Android, X11 and Windows.
* </p>
*/
static final int VID_UNDEFINED = 0;
/** Comparing {@link VIDType#NATIVE} */
public static class VIDComparator implements Comparator<VisualIDHolder> {
private VIDType type;
public VIDComparator(VIDType type) {
this.type = type;
}
public int compare(VisualIDHolder vid1, VisualIDHolder vid2) {
final int id1 = vid1.getVisualID(type);
final int id2 = vid2.getVisualID(type);
if(id1 > id2) {
return 1;
} else if(id1 < id2) {
return -1;
}
return 0;
}
}
}
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