Allow constructing an EglBase from an existing shared EGLContext.

webrtc/sdk/android/api/org/webrtc/EglBase.java

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 98 matching lines @@
   }
 
   /**
    * Explicitly create a root EGl 1.0 context with the specified config attributes.
    */
   public static EglBase createEgl10(int[] configAttributes) {
     return new EglBase10(null /* shaderContext */, configAttributes);
   }
 
   /**
+   * Explicitly create a root EGl 1.0 context with the specified config attributes
+   * and shader context.

[magjed_webrtc, 2017/05/25 14:25:19]

nit: shared, not shader.

[Taylor Brandstetter, 2017/05/25 16:53:57]

Done; I saw "shaderContext" used in another place to refer to the EGLContext
itself, so I wasn't sure what the right term here was.

+   */
+  public static EglBase createEgl10(
+      javax.microedition.khronos.egl.EGLContext sharedContext, int[] configAttributes) {
+    return new EglBase10(new EglBase10.Context(sharedContext), configAttributes);
+  }
+
+  /**
    * Explicitly create a root EGl 1.4 context with the specified config attributes.
    */
   public static EglBase createEgl14(int[] configAttributes) {
     return new EglBase14(null /* shaderContext */, configAttributes);
   }
 
+  /**
+   * Explicitly create a root EGl 1.4 context with the specified config attributes
+   * and shader context.

[magjed_webrtc, 2017/05/25 14:25:19]

nit: shared, not shader.

+   */
+  public static EglBase createEgl14(
+      android.opengl.EGLContext sharedContext, int[] configAttributes) {
+    return new EglBase14(new EglBase14.Context(sharedContext), configAttributes);
+  }
+
   public abstract void createSurface(Surface surface);
 
   // Create EGLSurface from the Android SurfaceTexture.
   public abstract void createSurface(SurfaceTexture surfaceTexture);
 
   // Create dummy 1x1 pixel buffer surface so the context can be made current.
   public abstract void createDummyPbufferSurface();
 
   public abstract void createPbufferSurface(int width, int height);
 
   public abstract Context getEglBaseContext();
 
   public abstract boolean hasSurface();
 
   public abstract int surfaceWidth();
 
   public abstract int surfaceHeight();
 
   public abstract void releaseSurface();
 
   public abstract void release();
 
   public abstract void makeCurrent();
 
   // Detach the current EGL context, so that it can be made current on another thread.
   public abstract void detachCurrent();
 
   public abstract void swapBuffers();
 }