VC4: Only load Broadcom EGL driver when guessVCIVUsed

Broadcom VC IV can be used from
both console and from inside X11

When used from inside X11
rendering is done on an DispmanX overlay surface
while keeping an X11 nativewindow under as input.

When Broadcom VC IV is guessed
only the Broadcom DispmanX EGL driver is loaded.
Therefore standard TYPE_X11 EGL can not be used.

1 files changed, 14 insertions, 4 deletions

diff --git a/src/nativewindow/classes/com/jogamp/nativewindow/NativeWindowFactory.java b/src/nativewindow/classes/com/jogamp/nativewindow/NativeWindowFactory.java
index d4249d404..bedf15c7b 100644
--- a/src/nativewindow/classes/com/jogamp/nativewindow/NativeWindowFactory.java
+++ b/src/nativewindow/classes/com/jogamp/nativewindow/NativeWindowFactory.java
@@ -174,7 +174,20 @@ public abstract class NativeWindowFactory {
                   guessGBM(true);
                   BcmVCArtifacts.guessVCIVUsed(true);
               }
-
+              if( BcmVCArtifacts.guessVCIVUsed(false) ) {
+                 /* Broadcom VC IV can be used from
+                  * both console and from inside X11
+                  *
+                  * When used from inside X11
+                  * rendering is done on an DispmanX overlay surface
+                  * while keeping an X11 nativewindow under as input.
+                  *
+                  * When Broadcom VC IV is guessed
+                  * only the Broadcom DispmanX EGL driver is loaded.
+                  * Therefore standard TYPE_X11 EGL can not be used.
+                  */
+                  return TYPE_BCM_VC_IV;
+              }
               if( guessX(false) ) {
                   return TYPE_X11;
               }
@@ -185,9 +198,6 @@ public abstract class NativeWindowFactory {
               if( guessGBM(false) ) {
                   return TYPE_DRM_GBM;
               }
-              if( BcmVCArtifacts.guessVCIVUsed(false) ) {
-                  return TYPE_BCM_VC_IV;
-              }
               return TYPE_X11;
         }
     }