Enable uploading vertex array with non-zero stride in Android shader.

sdk/android/api/org/webrtc/GlShader.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 64 matching lines @@
       throw new RuntimeException("Could not locate '" + label + "' in program");
     }
     return location;
   }
 
   /**
    * Enable and upload a vertex array for attribute |label|. The vertex data is specified in
    * |buffer| with |dimension| number of components per vertex.
    */
   public void setVertexAttribArray(String label, int dimension, FloatBuffer buffer) {
+    setVertexAttribArray(label, dimension, 0, buffer);
+  }
+
+  /**
+   * Enable and upload a vertex array for attribute |label|. The vertex data is specified in
+   * |buffer| with |dimension| number of components per vertex and specified |stride|.
+   */
+  public void setVertexAttribArray(String label, int dimension, int stride, FloatBuffer buffer) {
     if (program == -1) {
       throw new RuntimeException("The program has been released");
     }
     int location = getAttribLocation(label);
     GLES20.glEnableVertexAttribArray(location);
-    GLES20.glVertexAttribPointer(location, dimension, GLES20.GL_FLOAT, false, 0, buffer);
+    GLES20.glVertexAttribPointer(location, dimension, GLES20.GL_FLOAT, false, stride, buffer);
     GlUtil.checkNoGLES2Error("setVertexAttribArray");
   }
 
   public int getUniformLocation(String label) {
     if (program == -1) {
       throw new RuntimeException("The program has been released");
     }
     int location = GLES20.glGetUniformLocation(program, label);
     if (location < 0) {
       throw new RuntimeException("Could not locate uniform '" + label + "' in program");
@@ skipping 11 matching lines @@
 
   public void release() {
     Logging.d(TAG, "Deleting shader.");
     // Delete program, automatically detaching any shaders from it.
     if (program != -1) {
       GLES20.glDeleteProgram(program);
       program = -1;
     }
   }
 }