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);
}
/**
* Create a GLCanvas widget using the attributes described in the GLData object provided.
*
* @param parent a composite widget
* @param style the bitwise OR'ing of widget styles
* @param data the requested attributes of the GLCanvas
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT when the data is null
* <li>ERROR_UNSUPPORTED_DEPTH when the requested attributes cannot be provided
* </ul>
* </ul>
*/
public GLCanvas(Composite parent, int style, GLData data) {
super(parent, style);
if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
int glxAttrib[] = new int[MAX_ATTRIBUTES];
int pos = 0;
glxAttrib[pos++] = GLX.GLX_RGBA;
if (data.doubleBuffer) glxAttrib[pos++] = GLX.GLX_DOUBLEBUFFER;
if (data.stereo) glxAttrib[pos++] = GLX.GLX_STEREO;
if (data.redSize > 0) {
glxAttrib[pos++] = GLX.GLX_RED_SIZE;
glxAttrib[pos++] = data.redSize;
}
if (data.greenSize > 0) {
glxAttrib[pos++] = GLX.GLX_GREEN_SIZE;
glxAttrib[pos++] = data.greenSize;
}
if (data.blueSize > 0) {
glxAttrib[pos++] = GLX.GLX_BLUE_SIZE;
glxAttrib[pos++] = data.blueSize;
}
if (data.alphaSize > 0) {
glxAttrib[pos++] = GLX.GLX_ALPHA_SIZE;
glxAttrib[pos++] = data.alphaSize;
}
if (data.depthSize > 0) {
glxAttrib[pos++] = GLX.GLX_DEPTH_SIZE;
glxAttrib[pos++] = data.depthSize;
}
if (data.stencilSize > 0) {
glxAttrib[pos++] = GLX.GLX_STENCIL_SIZE;
glxAttrib[pos++] = data.stencilSize;
}
if (data.accumRedSize > 0) {
glxAttrib[pos++] = GLX.GLX_ACCUM_RED_SIZE;
glxAttrib[pos++] = data.accumRedSize;
}
if (data.accumGreenSize > 0) {
glxAttrib[pos++] = GLX.GLX_ACCUM_GREEN_SIZE;
glxAttrib[pos++] = data.accumGreenSize;
}
if (data.accumBlueSize > 0) {
glxAttrib[pos++] = GLX.GLX_ACCUM_BLUE_SIZE;
glxAttrib[pos++] = data.accumBlueSize;
}
if (data.accumAlphaSize > 0) {
glxAttrib[pos++] = GLX.GLX_ACCUM_ALPHA_SIZE;
glxAttrib[pos++] = data.accumAlphaSize;
}
if (data.sampleBuffers > 0) {
glxAttrib[pos++] = GLX.GLX_SAMPLE_BUFFERS;
glxAttrib[pos++] = data.sampleBuffers;
}
if (data.samples > 0) {
glxAttrib[pos++] = GLX.GLX_SAMPLES;
glxAttrib[pos++] = data.samples;
}
glxAttrib[pos++] = 0;
OS.gtk_widget_realize(handle);
int /*long*/ window = OS.GTK_WIDGET_WINDOW(handle);
int /*long*/ xDisplay = OS.gdk_x11_drawable_get_xdisplay(window);
int /*long*/ infoPtr = GLX.glXChooseVisual(xDisplay, OS.XDefaultScreen(xDisplay), glxAttrib);
if (infoPtr == 0) {
dispose();
SWT.error(SWT.ERROR_UNSUPPORTED_DEPTH);
}
vinfo = new XVisualInfo();
GLX.memmove(vinfo, infoPtr, XVisualInfo.sizeof);
OS.XFree(infoPtr);
int /*long*/ screen = OS.gdk_screen_get_default();
int /*long*/ gdkvisual = OS.gdk_x11_screen_lookup_visual(screen, vinfo.visualid);
// FIXME- share lists
// context = GLX.glXCreateContext (xDisplay, info, share == null ? 0 : share.context, true);
context = GLX.glXCreateContext(xDisplay, vinfo, 0, true);
if (context == 0) SWT.error(SWT.ERROR_NO_HANDLES);
GdkWindowAttr attrs = new GdkWindowAttr();
attrs.width = 1;
attrs.height = 1;
attrs.event_mask =
OS.GDK_KEY_PRESS_MASK
| OS.GDK_KEY_RELEASE_MASK
| OS.GDK_FOCUS_CHANGE_MASK
| OS.GDK_POINTER_MOTION_MASK
| OS.GDK_BUTTON_PRESS_MASK
| OS.GDK_BUTTON_RELEASE_MASK
| OS.GDK_ENTER_NOTIFY_MASK
| OS.GDK_LEAVE_NOTIFY_MASK
| OS.GDK_EXPOSURE_MASK
| OS.GDK_VISIBILITY_NOTIFY_MASK
| OS.GDK_POINTER_MOTION_HINT_MASK;
attrs.window_type = OS.GDK_WINDOW_CHILD;
attrs.visual = gdkvisual;
glWindow = OS.gdk_window_new(window, attrs, OS.GDK_WA_VISUAL);
OS.gdk_window_set_user_data(glWindow, handle);
if ((style & SWT.NO_BACKGROUND) != 0) OS.gdk_window_set_back_pixmap(window, 0, false);
xWindow = OS.gdk_x11_drawable_get_xid(glWindow);
OS.gdk_window_show(glWindow);
Listener listener =
new Listener() {
public void handleEvent(Event event) {
switch (event.type) {
case SWT.Paint:
/**
* Bug in MESA. MESA does some nasty sort of polling to try and ensure that their
* buffer sizes match the current X state. This state can be updated using
* glViewport(). FIXME: There has to be a better way of doing this.
*/
int[] viewport = new int[4];
GLX.glGetIntegerv(GLX.GL_VIEWPORT, viewport);
GLX.glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
break;
case SWT.Resize:
Rectangle clientArea = getClientArea();
OS.gdk_window_move(glWindow, clientArea.x, clientArea.y);
OS.gdk_window_resize(glWindow, clientArea.width, clientArea.height);
break;
case SWT.Dispose:
int /*long*/ window = OS.GTK_WIDGET_WINDOW(handle);
int /*long*/ xDisplay = OS.gdk_x11_drawable_get_xdisplay(window);
if (context != 0) {
if (GLX.glXGetCurrentContext() == context) {
GLX.glXMakeCurrent(xDisplay, 0, 0);
}
GLX.glXDestroyContext(xDisplay, context);
context = 0;
}
if (glWindow != 0) {
OS.gdk_window_destroy(glWindow);
glWindow = 0;
}
break;
}
}
};
addListener(SWT.Resize, listener);
addListener(SWT.Paint, listener);
addListener(SWT.Dispose, listener);
}