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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package org.chromium.chromoting;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
/**
* Utility class for Cardboard activity.
*/
public class CardboardActivityUtility {
private static final int BYTE_PER_FLOAT = 4;
/**
* Create rectangular texture float buffer.
*/
public static FloatBuffer makeRectangularTextureBuffer(float left, float right,
float bottom, float top) {
float[] position = new float[] {
left, bottom,
left, top,
right, bottom,
left, top,
right, top,
right, bottom
};
return makeFloatBuffer(position);
}
/**
* Convert float array to a FloatBuffer for use in OpenGL calls.
*/
public static FloatBuffer makeFloatBuffer(float[] data) {
FloatBuffer result = ByteBuffer
.allocateDirect(data.length * BYTE_PER_FLOAT)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
result.put(data).position(0);
return result;
}
}
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