Reland of Combine webrtc/api/java/android and webrtc/api/java/src.

webrtc/api/java/android/org/webrtc/GlUtil.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.
- */
-
-package org.webrtc;
-
-import android.opengl.GLES20;
-
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.nio.FloatBuffer;
-
-/**
- * Some OpenGL static utility functions.
- */
-public class GlUtil {
-  private GlUtil() {}
-
-  // Assert that no OpenGL ES 2.0 error has been raised.
-  public static void checkNoGLES2Error(String msg) {
-    int error = GLES20.glGetError();
-    if (error != GLES20.GL_NO_ERROR) {
-      throw new RuntimeException(msg + ": GLES20 error: " + error);
-    }
-  }
-
-  public static FloatBuffer createFloatBuffer(float[] coords) {
-    // Allocate a direct ByteBuffer, using 4 bytes per float, and copy coords into it.
-    ByteBuffer bb = ByteBuffer.allocateDirect(coords.length * 4);
-    bb.order(ByteOrder.nativeOrder());
-    FloatBuffer fb = bb.asFloatBuffer();
-    fb.put(coords);
-    fb.position(0);
-    return fb;
-  }
-
-  /**
-   * Generate texture with standard parameters.
-   */
-  public static int generateTexture(int target) {
-    final int textureArray[] = new int[1];
-    GLES20.glGenTextures(1, textureArray, 0);
-    final int textureId = textureArray[0];
-    GLES20.glBindTexture(target, textureId);
-    GLES20.glTexParameterf(target, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
-    GLES20.glTexParameterf(target, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
-    GLES20.glTexParameterf(target, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
-    GLES20.glTexParameterf(target, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);
-    checkNoGLES2Error("generateTexture");
-    return textureId;
-  }
-}