/*

 * Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package sun.java2d.opengl;

import java.awt.Color;

import java.awt.Transparency;

import sun.java2d.SurfaceData;

import sun.java2d.SurfaceDataProxy;

import sun.java2d.loops.SurfaceType;

import sun.java2d.loops.CompositeType;

/**

 * The proxy class contains the logic for when to replace a

 * SurfaceData with a cached OGL Texture and the code to create

 * the accelerated surfaces.

 */

public class OGLSurfaceDataProxy extends SurfaceDataProxy {

    public static SurfaceDataProxy createProxy(SurfaceData srcData,

                                               OGLGraphicsConfig dstConfig)

    {

        if (srcData instanceof OGLSurfaceData) {

            // srcData must be a VolatileImage which either matches

            // our pixel format or not - either way we do not cache it...

            return UNCACHED;

        }

        return new OGLSurfaceDataProxy(dstConfig, srcData.getTransparency());

    }

    OGLGraphicsConfig oglgc;

    int transparency;

    public OGLSurfaceDataProxy(OGLGraphicsConfig oglgc, int transparency) {

        this.oglgc = oglgc;

        this.transparency = transparency;

    }

    @Override

    public SurfaceData validateSurfaceData(SurfaceData srcData,

                                           SurfaceData cachedData,

                                           int w, int h)

    {

        if (cachedData == null) {

            try {

                cachedData = oglgc.createManagedSurface(w, h, transparency);

            } catch (OutOfMemoryError er) {

                return null;

            }

        }

        return cachedData;

    }

    @Override

    public boolean isSupportedOperation(SurfaceData srcData,

                                        int txtype,

                                        CompositeType comp,

                                        Color bgColor)

    {

        return comp.isDerivedFrom(CompositeType.AnyAlpha) &&

               (bgColor == null || transparency == Transparency.OPAQUE);

    }

}