GLUtilities.java

package com.godoro.androidopengl;


import android.graphics.*;
import android.opengl.*;

import java.nio.*;

import javax.microedition.khronos.opengles.*;

public class GLUtilities {

    public static FloatBuffer toFloatBuffer(float[] floatArray) {
        ByteBuffer byteBuffer = ByteBuffer.allocateDirect(floatArray.length * 4);
        byteBuffer.order(ByteOrder.nativeOrder());
        FloatBuffer floatBuffer = byteBuffer.asFloatBuffer();
        floatBuffer.put(floatArray);
        floatBuffer.position(0);
        return floatBuffer;
    }
    public static ShortBuffer toShortBuffer(short[] shortArray) {
        ByteBuffer byteBuffer = ByteBuffer.allocateDirect(shortArray.length * 4);
        byteBuffer.order(ByteOrder.nativeOrder());
        ShortBuffer shortBuffer = byteBuffer.asShortBuffer();
        shortBuffer.put(shortArray);
        shortBuffer.position(0);
        return shortBuffer;
    }
    public static ByteBuffer toByteBuffer(byte[] byteArray) {
        ByteBuffer byteBuffer = ByteBuffer.allocateDirect(byteArray.length);
        byteBuffer.put(byteArray);
        byteBuffer.position(0);
        return byteBuffer;
    }
    public static int loadTexture(GL10 gl,Bitmap bitmap){
        int[] textures = new int[1];
        gl.glGenTextures(1, textures, 0);
        int textureId = textures[0];

        gl.glBindTexture(GL10.GL_TEXTURE_2D, textureId);

        gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER,
                GL10.GL_LINEAR);
        gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER,
                GL10.GL_LINEAR);

        gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S,
                GL10.GL_CLAMP_TO_EDGE);
        gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T,
                GL10.GL_REPEAT);

        GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0);
        return textureId;

    }
}