public Writer(Program program, BoWriter<? super DrawVert> writer) {
mProgram = program;
mVertWriter = writer;
mVao = new Vao(mVbo, null);
program.init(mDraw);
writer.attributes(mVao);
}
@Override
protected void freeObject() {
mProgram.dispose(mDraw);
mVao.dispose(mDraw);
}