@Override
 public void glDeleteFramebuffers(GL11ExtensionPack gl11ep, int n, int[] buffers, int offset) {
   GLES20.glDeleteFramebuffers(n, buffers, offset);
   GLES20Canvas.checkError();
 }
 @Override
 public void glDeleteBuffers(GL11 gl, int n, int[] buffers, int offset) {
   GLES20.glDeleteBuffers(n, buffers, offset);
   GLES20Canvas.checkError();
 }
 @Override
 public void glGenBuffers(int n, int[] buffers, int offset) {
   GLES20.glGenBuffers(n, buffers, offset);
   GLES20Canvas.checkError();
 }
 @Override
 public void glDeleteTextures(GL11 gl, int n, int[] textures, int offset) {
   GLES20.glDeleteTextures(n, textures, offset);
   GLES20Canvas.checkError();
 }
 @Override
 public int generateTexture() {
   GLES20.glGenTextures(1, mTempIntArray, 0);
   GLES20Canvas.checkError();
   return mTempIntArray[0];
 }