/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * 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 com.android.camera.ui;

import android.graphics.Rect;

import javax.microedition.khronos.opengles.GL11;

public class PopupWindowStencilImpl extends PopupWindow {

    @Override
    protected void renderBackground(GLRootView rootView, GL11 gl) {
        int width = getWidth();
        int height = getHeight();
        int aWidth = mAnchor.getWidth();
        int aHeight = mAnchor.getHeight();

        Rect p = mPaddings;
        int aXoffset = width - aWidth;
        int aYoffset = Math.max(p.top, mAnchorPosition - aHeight / 2);
        aYoffset = Math.min(aYoffset, height - p.bottom - aHeight);

        if (mAnchor != null) {
            gl.glStencilOp(GL11.GL_KEEP, GL11.GL_KEEP, GL11.GL_REPLACE);
            gl.glStencilFunc(GL11.GL_ALWAYS, 1, 1);
            mAnchor.draw(rootView, aXoffset, aYoffset);
            gl.glStencilFunc(GL11.GL_NOTEQUAL, 1, 1);
            gl.glStencilOp(GL11.GL_KEEP, GL11.GL_KEEP, GL11.GL_KEEP);
        }

        if (mBackground != null) {
            mBackground.setSize(width - aWidth + mAnchorOffset, height);
            mBackground.draw(rootView, 0, 0);
        }
    }
}