SimpleUtilities.java

package com.godoro.androidopengl;

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

import java.nio.*;

import javax.microedition.khronos.opengles.*;

public class SimpleUtilities {
    public static FloatBuffer toFloatBuffer(float[] floatArray,int factor) {
        ByteBuffer byteBuffer = ByteBuffer.allocateDirect(floatArray.length * factor);
        byteBuffer.order(ByteOrder.nativeOrder());
        FloatBuffer floatBuffer = byteBuffer.asFloatBuffer();
        floatBuffer.put(floatArray);
        floatBuffer.position(0);
        return floatBuffer;
    }
    public static FloatBuffer toFloatBuffer(float[] floatArray) {
        return toFloatBuffer(floatArray,4);
    }

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

//        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);
        bitmap.recycle();
        return textureId;

    }

    public static int loadTextureFromResource( GL10 gl, Context context, int resourceId) {
        Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), resourceId);
        return loadTexture(gl,bitmap);
    }
}