static List<GLCapabilitiesImmutable> getAvailableGLCapabilitiesXVisual(
X11GraphicsScreen x11Screen, GLProfile glProfile, boolean isMultisampleAvailable) {
AbstractGraphicsDevice absDevice = x11Screen.getDevice();
long display = absDevice.getHandle();
int screen = x11Screen.getIndex();
int[] count = new int[1];
XVisualInfo template = XVisualInfo.create();
template.setScreen(screen);
XVisualInfo[] infos =
X11Lib.XGetVisualInfo(display, X11Lib.VisualScreenMask, template, count, 0);
if (infos == null || infos.length < 1) {
throw new GLException("Error while enumerating available XVisualInfos");
}
ArrayList<GLCapabilitiesImmutable> availableCaps = new ArrayList<GLCapabilitiesImmutable>();
for (int i = 0; i < infos.length; i++) {
if (!X11GLXGraphicsConfiguration.XVisualInfo2GLCapabilities(
availableCaps,
glProfile,
display,
infos[i],
GLGraphicsConfigurationUtil.ALL_BITS,
isMultisampleAvailable)) {
if (DEBUG) {
System.err.println(
"X11GLXGraphicsConfiguration.getAvailableGLCapabilitiesXVisual: XVisual invalid: ("
+ x11Screen
+ "): fbcfg: "
+ toHexString(infos[i].getVisualid()));
}
}
}
return availableCaps;
}
private static X11GLXGraphicsConfiguration chooseGraphicsConfigurationXVisual(
GLCapabilitiesImmutable capsChosen,
GLCapabilitiesImmutable capsReq,
GLCapabilitiesChooser chooser,
X11GraphicsScreen x11Screen) {
if (chooser == null) {
chooser = new DefaultGLCapabilitiesChooser();
}
GLProfile glProfile = capsChosen.getGLProfile();
final int winattrmask =
GLGraphicsConfigurationUtil.getWinAttributeBits(
capsChosen.isOnscreen(), false /* pbuffer */);
ArrayList availableCaps = new ArrayList();
int recommendedIndex = -1;
AbstractGraphicsDevice absDevice = x11Screen.getDevice();
long display = absDevice.getHandle();
int screen = x11Screen.getIndex();
final X11GLXDrawableFactory factory =
(X11GLXDrawableFactory) GLDrawableFactory.getDesktopFactory();
final boolean isMultisampleAvailable = factory.isGLXMultisampleAvailable(absDevice);
int[] attribs =
X11GLXGraphicsConfiguration.GLCapabilities2AttribList(
capsChosen, false, isMultisampleAvailable, display, screen);
// 1st choice: get GLCapabilities based on users GLCapabilities setting recommendedIndex as
// preferred choice
XVisualInfo recommendedVis = GLX.glXChooseVisual(display, screen, attribs, 0);
if (DEBUG) {
System.err.print("glXChooseVisual recommended ");
if (recommendedVis == null) {
System.err.println("null visual");
} else {
System.err.println("visual id " + toHexString(recommendedVis.getVisualid()));
}
}
// 2nd choice: get all GLCapabilities available, preferred recommendedIndex might be available
// if 1st choice was successful
int[] count = new int[1];
XVisualInfo template = XVisualInfo.create();
template.setScreen(screen);
XVisualInfo[] infos =
X11Lib.XGetVisualInfo(display, X11Lib.VisualScreenMask, template, count, 0);
if (infos == null || infos.length < 1) {
throw new GLException("Error while enumerating available XVisualInfos");
}
for (int i = 0; i < infos.length; i++) {
if (!X11GLXGraphicsConfiguration.XVisualInfo2GLCapabilities(
availableCaps, glProfile, display, infos[i], winattrmask, isMultisampleAvailable)) {
if (DEBUG) {
System.err.println(
"X11GLXGraphicsConfiguration.chooseGraphicsConfigurationXVisual: XVisual invalid: ("
+ x11Screen
+ "): fbcfg: "
+ toHexString(infos[i].getVisualid()));
}
} else {
// Attempt to find the visual chosenIndex by glXChooseVisual, if not translucent
if (capsChosen.isBackgroundOpaque()
&& recommendedVis != null
&& recommendedVis.getVisualid() == infos[i].getVisualid()) {
recommendedIndex = availableCaps.size() - 1;
}
}
}
int chosenIndex = chooseCapabilities(chooser, capsChosen, availableCaps, recommendedIndex);
if (0 > chosenIndex) {
if (DEBUG) {
System.err.println(
"X11GLXGraphicsConfiguration.chooseGraphicsConfigurationXVisual: failed, return null");
Thread.dumpStack();
}
return null;
}
X11GLCapabilities chosenCaps = (X11GLCapabilities) availableCaps.get(chosenIndex);
return new X11GLXGraphicsConfiguration(x11Screen, chosenCaps, capsReq, chooser);
}