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/**
 * Copyright 2011 The PlayN Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package playn.core.gl;

import playn.core.AbstractLayer;
import playn.core.InternalTransform;

public abstract class LayerGL extends AbstractLayer {
  private final InternalTransform savedLocal;

  protected final GLContext ctx;

  protected LayerGL(GLContext ctx) {
    super(ctx.createTransform());
    this.ctx = ctx;
    this.savedLocal = ctx.createTransform();
  }

  protected InternalTransform localTransform(InternalTransform parentTransform) {
    savedLocal.set(parentTransform);
    return savedLocal.concatenate(transform, originX, originY);
  }

  public abstract void paint(InternalTransform parentTransform, float parentAlpha);
}