How to use

ETC1

in

android.opengl

public void setBitmap(Bitmap bitmap) {
  mBitmap = bitmap;
  int imageSize = bitmap.getRowBytes() * bitmap.getHeight();
  ByteBuffer uncompressedBuffer = ByteBuffer.allocateDirect(imageSize);
  bitmap.copyPixelsToBuffer(uncompressedBuffer);
  uncompressedBuffer.position(0);
  ByteBuffer compressedBuffer = ByteBuffer.allocateDirect(
      ETC1.getEncodedDataSize(bitmap.getWidth(), bitmap.getHeight())).order(ByteOrder.nativeOrder());
  ETC1.encodeImage(uncompressedBuffer, bitmap.getWidth(), bitmap.getHeight(), 2, 2 * bitmap.getWidth(),
      compressedBuffer);
  mByteBuffers = new ByteBuffer[]{compressedBuffer};
  setWidth(bitmap.getWidth());
  setHeight(bitmap.getHeight());
}

private ETC1Util.ETC1Texture createTexture(InputStream input) throws IOException {
  int width = 0;
  int height = 0;
  byte[] ioBuffer = new byte[4096];
  {
    if (input.read(ioBuffer, 0, ETC1.ETC_PKM_HEADER_SIZE) != ETC1.ETC_PKM_HEADER_SIZE) {
      throw new IOException("Unable to read PKM file header.");
    }
    if(headerBuffer==null){
      headerBuffer = ByteBuffer.allocateDirect(ETC1.ETC_PKM_HEADER_SIZE)
        .order(ByteOrder.nativeOrder());
    }
    headerBuffer.put(ioBuffer, 0, ETC1.ETC_PKM_HEADER_SIZE).position(0);
    if (!ETC1.isValid(headerBuffer)) {
      throw new IOException("Not a PKM file.");
    }
    width = ETC1.getWidth(headerBuffer);
    height = ETC1.getHeight(headerBuffer);
  }
  int encodedSize = ETC1.getEncodedDataSize(width, height);
  ByteBuffer dataBuffer = ByteBuffer.allocateDirect(encodedSize).order(ByteOrder.nativeOrder());
  int len;
  while ((len =input.read(ioBuffer))!=-1){
    dataBuffer.put(ioBuffer,0,len);
  }
  dataBuffer.position(0);
  return new ETC1Util.ETC1Texture(width, height, dataBuffer);
}

@Override
protected void onSizeChanged(int width, int height) {
  emptyBuffer=ByteBuffer.allocateDirect(ETC1.getEncodedDataSize(width,height));
  this.width=width;
  this.height=height;
  GLES20.glEnable(GLES20.GL_BLEND);
  GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA,GLES20.GL_ONE_MINUS_SRC_ALPHA);
}

@Override
protected void onSizeChanged(int width, int height) {
  emptyBuffer=ByteBuffer.allocateDirect(ETC1.getEncodedDataSize(width,height));
  this.width=width;
  this.height=height;
  GLES20.glEnable(GLES20.GL_BLEND);
  GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA,GLES20.GL_ONE_MINUS_SRC_ALPHA);
  mBaseFilter.setSize(width, height);
}

  private void setBitmap(Bitmap bitmap) {
    mBitmap = bitmap;
    int imageSize = bitmap.getRowBytes() * bitmap.getHeight();
    ByteBuffer uncompressedBuffer = ByteBuffer.allocateDirect(imageSize);
    bitmap.copyPixelsToBuffer(uncompressedBuffer);
    uncompressedBuffer.position(0);

    ByteBuffer compressedBuffer = ByteBuffer.allocateDirect(
      ETC1.getEncodedDataSize(bitmap.getWidth(), bitmap.getHeight())).order(ByteOrder.nativeOrder());
    ETC1.encodeImage(uncompressedBuffer, bitmap.getWidth(), bitmap.getHeight(), 2, 2 * bitmap.getWidth(),
      compressedBuffer);
    setCompressionFormat(ETC1.ETC1_RGB8_OES);

    mByteBuffers = new ByteBuffer[]{compressedBuffer};
    setWidth(bitmap.getWidth());
    setHeight(bitmap.getHeight());
  }
}

public void setBitmap(Bitmap bitmap) {
  mBitmap = bitmap;
  int imageSize = bitmap.getRowBytes() * bitmap.getHeight();
  ByteBuffer uncompressedBuffer = ByteBuffer.allocateDirect(imageSize);
  bitmap.copyPixelsToBuffer(uncompressedBuffer);
  uncompressedBuffer.position(0);
  ByteBuffer compressedBuffer = ByteBuffer.allocateDirect(
      ETC1.getEncodedDataSize(bitmap.getWidth(), bitmap.getHeight())).order(ByteOrder.nativeOrder());
  ETC1.encodeImage(uncompressedBuffer, bitmap.getWidth(), bitmap.getHeight(), 2, 2 * bitmap.getWidth(),
      compressedBuffer);
  mByteBuffers = new ByteBuffer[]{compressedBuffer};
  setWidth(bitmap.getWidth());
  setHeight(bitmap.getHeight());
}

  private void setBitmap(Bitmap bitmap) {
    mBitmap = bitmap;
    int imageSize = bitmap.getRowBytes() * bitmap.getHeight();
    ByteBuffer uncompressedBuffer = ByteBuffer.allocateDirect(imageSize);
    bitmap.copyPixelsToBuffer(uncompressedBuffer);
    uncompressedBuffer.position(0);

    ByteBuffer compressedBuffer = ByteBuffer.allocateDirect(
      ETC1.getEncodedDataSize(bitmap.getWidth(), bitmap.getHeight())).order(ByteOrder.nativeOrder());
    ETC1.encodeImage(uncompressedBuffer, bitmap.getWidth(), bitmap.getHeight(), 2, 2 * bitmap.getWidth(),
      compressedBuffer);
    setCompressionFormat(ETC1.ETC1_RGB8_OES);

    mByteBuffers = new ByteBuffer[]{compressedBuffer};
    setWidth(bitmap.getWidth());
    setHeight(bitmap.getHeight());
  }
}