Bug 888 - Validate CPU Runtime Performance: X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(..)

X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(..) ran over all FB configs and for each it grabbed
native config values separately. Fetching them in bulk mode saves around 7% of this function's cost.

Also reuse XRenderPictFormat instance for 'XRenderDirectFormat XRenderFindVisualFormat(..)' call,
saving a few NIO creation cycles w/ StructAccessor.

Biggest savior is X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationFBConfig()'s
fast path w/o chooser and usable 1st FBConfig. Here we only issue 'GLXFBConfig2GLCapabilities(..)'
on the first valid entry.

Test w/ 50 X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationFBConfig() invocations:
  - pre change:  1.708 ms
  - post change:   650 ms

Time is no spent almost solely on native glXChooseFBConfig (546ms).

1 files changed, 15 insertions, 0 deletions

diff --git a/src/nativewindow/native/x11/Xmisc.c b/src/nativewindow/native/x11/Xmisc.c
index 31620d752..2bf740233 100644
--- a/src/nativewindow/native/x11/Xmisc.c
+++ b/src/nativewindow/native/x11/Xmisc.c
@@ -33,6 +33,8 @@
 
 #include <X11/Xatom.h>
 
+#include <X11/extensions/Xrender.h>
+
 // #define VERBOSE_ON 1
 
 #ifdef VERBOSE_ON
@@ -322,6 +324,19 @@ Java_jogamp_nativewindow_x11_X11Util_setX11ErrorHandler0(JNIEnv *env, jclass _un
 
 /*   Java->C glue code:
  *   Java package: jogamp.nativewindow.x11.X11Lib
+ *    Java method: boolean XRenderFindVisualFormat(long dpy, long visual, XRenderPictFormat dest)
+ */
+JNIEXPORT jboolean JNICALL 
+Java_jogamp_nativewindow_x11_X11Lib_XRenderFindVisualFormat1(JNIEnv *env, jclass _unused, jlong dpy, jlong visual, jobject xRenderPictFormat) {
+  XRenderPictFormat * dest = (XRenderPictFormat *) (*env)->GetDirectBufferAddress(env, xRenderPictFormat);
+  XRenderPictFormat * src = XRenderFindVisualFormat((Display *) (intptr_t) dpy, (Visual *) (intptr_t) visual);
+  if (NULL == src) return JNI_FALSE;
+  memcpy(dest, src, sizeof(XRenderPictFormat));
+  return JNI_TRUE;
+}
+
+/*   Java->C glue code:
+ *   Java package: jogamp.nativewindow.x11.X11Lib
  *    Java method: XVisualInfo XGetVisualInfo(long arg0, long arg1, XVisualInfo arg2, java.nio.IntBuffer arg3)
  *     C function: XVisualInfo *  XGetVisualInfo(Display * , long, XVisualInfo * , int * );
  */