8354077: Get rid of offscreenSharingEnabled windows flag

Reviewed-by: prr

Author: mrserb

src/java.desktop/windows/classes/sun/java2d/windows/WindowsFlags.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -55,16 +55,6 @@ public class WindowsFlags {
      *               This flag can force us to use d3d
      *               anyway in these situations.  Or, this flag can force us to
      *               not use d3d in a situation where we would use it otherwise.
-     *      offscreenSharingEnabled: usage: "-Dsun.java2d.offscreenSharing=true"
-     *               Turns on the ability to share a hardware-accelerated
-     *               offscreen surface through the JAWT interface.  See
-     *               src/windows/native/sun/windows/awt_DrawingSurface.* for
-     *               more information.  This capability is disabled by default
-     *               pending more testing and time to work out the right
-     *               solution; we do not want to expose more public JAWT api
-     *               without being very sure that we will be willing to support
-     *               that API in the future regardless of other native
-     *               rendering pipeline changes.
      *      magPresent: usage: "-Djavax.accessibility.screen_magnifier_present"
      *               This flag is set either on the command line or in the
      *               properties file.  It tells Swing whether the user is
@@ -101,7 +91,6 @@ public class WindowsFlags {
     private static boolean d3dOnScreenEnabled;
     private static boolean oglEnabled;
     private static boolean oglVerbose;
-    private static boolean offscreenSharingEnabled;
     private static boolean magPresent;
     private static boolean setHighDPIAware;
     // TODO: other flags, including nopixfmt
@@ -206,8 +195,6 @@ private static void initJavaFlags() {
         if (d3dSet) {
             d3dVerbose = isBooleanPropTrueVerbose("sun.java2d.d3d");
         }
-        offscreenSharingEnabled =
-            getBooleanProp("sun.java2d.offscreenSharing", false);
         String dpiOverride = System.getProperty("sun.java2d.dpiaware");
         if (dpiOverride != null) {
             setHighDPIAware = dpiOverride.equalsIgnoreCase("true");
@@ -217,16 +204,6 @@ private static void initJavaFlags() {
             setHighDPIAware =
                 sunLauncherProperty.equalsIgnoreCase("SUN_STANDARD");
         }
-        /*
-            // Output info based on some non-default flags:
-            if (offscreenSharingEnabled) {
-                System.out.println(
-                    "Warning: offscreenSharing has been enabled. " +
-                    "The use of this capability will change in future " +
-                    "releases and applications that depend on it " +
-                    "may not work correctly");
-            }
-        */
         /*
         System.out.println("WindowsFlags (Java):");
         System.out.println("  ddEnabled: " + ddEnabled + "\n" +
@@ -235,8 +212,7 @@ private static void initJavaFlags() {
                            "  d3dSet: " + d3dSet + "\n" +
                            "  oglEnabled: " + oglEnabled + "\n" +
                            "  oglVerbose: " + oglVerbose + "\n" +
-                           "  gdiBlitEnabled: " + gdiBlitEnabled + "\n" +
-                           "  offscreenSharingEnabled: " + offscreenSharingEnabled);
+                           "  gdiBlitEnabled: " + gdiBlitEnabled);
         */
     }
 
@@ -260,10 +236,6 @@ public static boolean isGdiBlitEnabled() {
         return gdiBlitEnabled;
     }
 
-    public static boolean isOffscreenSharingEnabled() {
-        return offscreenSharingEnabled;
-    }
-
     public static boolean isMagPresent() {
         return magPresent;
     }

src/java.desktop/windows/native/libawt/java2d/windows/WindowsFlags.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -30,7 +30,6 @@
 BOOL      useD3D = TRUE;      // d3d enabled flag
                               // initially is TRUE to allow D3D preloading
 BOOL      forceD3DUsage;      // force d3d on or off
-jboolean  g_offscreenSharing; // JAWT accelerated surface sharing
 BOOL      setHighDPIAware;    // Whether to set the high-DPI awareness flag
 
 extern WCHAR *j2dAccelKey;       // Name of java2d root key
@@ -89,10 +88,6 @@ void GetFlagValues(JNIEnv *env, jclass wFlagsClass)
     }
     useD3D = d3dEnabled;
     forceD3DUsage = d3dSet;
-    g_offscreenSharing = GetStaticBoolean(env, wFlagsClass,
-                                          "offscreenSharingEnabled");
-    JNU_CHECK_EXCEPTION(env);
-
     setHighDPIAware =
         (IS_WINVISTA && GetStaticBoolean(env, wFlagsClass, "setHighDPIAware"));
     JNU_CHECK_EXCEPTION(env);
@@ -102,8 +97,6 @@ void GetFlagValues(JNIEnv *env, jclass wFlagsClass)
                 (useD3D ? "true" : "false"));
     J2dTraceLn1(J2D_TRACE_INFO, "  d3dSet = %s",
                 (forceD3DUsage ? "true" : "false"));
-    J2dTraceLn1(J2D_TRACE_INFO, "  offscreenSharing = %s",
-                (g_offscreenSharing ? "true" : "false"));
     J2dTraceLn1(J2D_TRACE_INFO, "  setHighDPIAware = %s",
                 (setHighDPIAware ? "true" : "false"));
 }

src/java.desktop/windows/native/libawt/java2d/windows/WindowsFlags.h

@@ -1,6 +1,5 @@
-
 /*
- * Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,7 +28,6 @@
 
 extern BOOL      useD3D;             // d3d enabled flag
 extern BOOL      forceD3DUsage;      // force d3d on or off
-extern jboolean  g_offscreenSharing; // JAWT accelerated surface sharing
 extern BOOL      setHighDPIAware;    // whether to set High DPI Aware flag on Vista
 
 void SetD3DEnabledFlag(JNIEnv *env, BOOL d3dEnabled, BOOL d3dSet);