Bug 776 GLContext Sharing: Add copy-ctor to GLArrayData* w/ sliced Buffer; Refine GearsObject* GLArrayDataServer copying; GearsES*: Init VBO eagerly

Add copy-ctor to GLArrayData* w/ sliced Buffer to allow general sharing of VBO via these high-level types.

Refine GearsObject* GLArrayDataServer copying (commit bcfaa149b9803ce33c5a356cbcb45f7dfd3e4361):
  Utilize new GLArrayData* copy-ctor.

GearsES*: Init VBO eagerly, allowing VBO usage after init(..).

3 files changed, 89 insertions, 0 deletions

diff --git a/src/jogl/classes/com/jogamp/opengl/util/GLArrayDataClient.java b/src/jogl/classes/com/jogamp/opengl/util/GLArrayDataClient.java
index f480c4bde..e281b14fd 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/GLArrayDataClient.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/GLArrayDataClient.java
@@ -444,6 +444,28 @@ public class GLArrayDataClient extends GLArrayDataWrapper implements GLArrayData
 
   protected GLArrayDataClient() { }
 
+  /**
+   * Copy Constructor
+   * <p>
+   * Buffer is {@link Buffers#slice(Buffer) sliced}, i.e. sharing content but using own state.
+   * </p>
+   * <p>
+   * All other values are simply copied.
+   * </p>
+   */
+  public GLArrayDataClient(GLArrayDataClient src) {
+    super(src);
+    this.isValidated = src.isValidated;
+    this.sealed = src.sealed;
+    this.bufferEnabled = src.bufferEnabled;
+    this.bufferWritten = src.bufferWritten;
+    this.enableBufferAlways = src.enableBufferAlways;
+    this.initialElementCount = src.initialElementCount;
+    this.glArrayHandler = src.glArrayHandler;
+    this.usesGLSL = src.usesGLSL;
+    this.shaderState = src.shaderState;
+  }
+
   protected boolean sealed;
   protected boolean bufferEnabled;
   protected boolean bufferWritten;
diff --git a/src/jogl/classes/com/jogamp/opengl/util/GLArrayDataServer.java b/src/jogl/classes/com/jogamp/opengl/util/GLArrayDataServer.java
index 96643ae72..4a12ff1ae 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/GLArrayDataServer.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/GLArrayDataServer.java
@@ -29,6 +29,7 @@
 package com.jogamp.opengl.util;
 
 import java.nio.Buffer;
+import java.nio.FloatBuffer;
 
 import javax.media.opengl.GL;
 import javax.media.opengl.GL2ES2;
@@ -36,6 +37,8 @@ import javax.media.opengl.GLArrayData;
 import javax.media.opengl.GLException;
 import javax.media.opengl.fixedfunc.GLPointerFuncUtil;
 
+import com.jogamp.common.nio.Buffers;
+
 import jogamp.opengl.util.GLArrayHandler;
 import jogamp.opengl.util.GLArrayHandlerInterleaved;
 import jogamp.opengl.util.GLDataArrayHandler;
@@ -364,6 +367,14 @@ public class GLArrayDataServer extends GLArrayDataClient implements GLArrayDataE
       return ad;
   }
 
+  public final void setInterleavedOffset(int interleavedOffset) {
+    this.interleavedOffset = interleavedOffset;
+  }
+
+  public final int getInterleavedOffset() {
+    return interleavedOffset;
+  }
+
   //
   // Data matters GLArrayData
   //
@@ -458,6 +469,22 @@ public class GLArrayDataServer extends GLArrayDataClient implements GLArrayDataE
     }
   }
 
+  protected GLArrayDataServer() { }
+
+  /**
+   * Copy Constructor
+   * <p>
+   * Buffer is {@link Buffers#slice(Buffer) sliced}, i.e. sharing content but using own state.
+   * </p>
+   * <p>
+   * All other values are simply copied.
+   * </p>
+   */
+  public GLArrayDataServer(GLArrayDataServer src) {
+    super(src);
+    this.interleavedOffset = src.interleavedOffset;
+  }
+
   private int interleavedOffset = 0;
 }
 
diff --git a/src/jogl/classes/com/jogamp/opengl/util/GLArrayDataWrapper.java b/src/jogl/classes/com/jogamp/opengl/util/GLArrayDataWrapper.java
index 290f47a6d..068ab5203 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/GLArrayDataWrapper.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/GLArrayDataWrapper.java
@@ -42,6 +42,8 @@ import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 import javax.media.opengl.fixedfunc.GLPointerFuncUtil;
 
+import com.jogamp.common.nio.Buffers;
+
 import jogamp.opengl.Debug;
 
 public class GLArrayDataWrapper implements GLArrayData {
@@ -373,6 +375,44 @@ public class GLArrayDataWrapper implements GLArrayData {
 
   protected GLArrayDataWrapper() { }
 
+  /**
+   * Copy Constructor
+   * <p>
+   * Buffer is {@link Buffers#slice(Buffer) sliced}, i.e. sharing content but using own state.
+   * </p>
+   * <p>
+   * All other values are simply copied.
+   * </p>
+   */
+  public GLArrayDataWrapper(GLArrayDataWrapper src) {
+    this.alive = src.alive;
+    this.index = src.index;
+    this.location = src.location;
+    this.name = src.name;
+    this.components = src.components;
+    this.componentType = src.componentType;
+    this.componentClazz = src.componentClazz;
+    this.componentByteSize = src.componentByteSize;
+    this.normalized = src.normalized;
+    this.strideB = src.strideB;
+    this.strideL = src.strideL;
+    if( null != src.buffer ) {
+        if( src.buffer.position() == 0 ) {
+            this.buffer = Buffers.slice(src.buffer);
+        } else {
+            this.buffer = Buffers.slice(src.buffer, 0, src.buffer.limit());
+        }
+    } else {
+        this.buffer = null;
+    }
+    this.isVertexAttribute = src.isVertexAttribute;
+    this.vboOffset = src.vboOffset;
+    this.vboName = src.vboName;
+    this.vboEnabled = src.vboEnabled;
+    this.vboUsage = src.vboUsage;
+    this.vboTarget = src.vboTarget;
+  }
+
   protected boolean alive;
   protected int index;
   protected int location;