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How to convert a png file to a PaletteTexture?

Bitmap originalBitmap = BitmapFactory.decodeStream(is);

 

int[] pixels = new int[originalBitmap.getHeight()*originalBitmap.getWidth()];

originalBitmap.getPixels(pixels, 0, originalBitmap.getWidth(), 0, 0, originalBitmap.getWidth(), originalBitmap.getHeight());

 

textureInfo.source = iFile;

 

gl.glGenTextures(1, textureInfo.textures, 0);

gl.glBindTexture(GL10.GL_TEXTURE_2D, textureInfo.textures[0]);

 

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);

 

 

byte[] textureData = new byte[pixels.length];

for (int i = 0; i < textureData.length; i++) {

    textureData[i] = new Integer(pixels[i]).byteValue();

}

int size = textureData.length;

 

ByteBuffer bb = ByteBuffer.allocateDirect(size);

bb.put(textureData);

bb.position(0);

 

gl.glCompressedTexImage2D(GL10.GL_TEXTURE_2D, -2, GL10.GL_PALETTE4_RGB8_OES, originalBitmap.getWidth(), h, originalBitmap.getHeight(),size, bb);