MTLSurfaceDataProxy.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package sun.java2d.metal;

import sun.java2d.SurfaceData;
import sun.java2d.SurfaceDataProxy;
import sun.java2d.loops.CompositeType;

import java.awt.Color;
import java.awt.Transparency;

/**
 * The proxy class contains the logic for when to replace a
 * SurfaceData with a cached MTL Texture and the code to create
 * the accelerated surfaces.
 */
public class MTLSurfaceDataProxy extends SurfaceDataProxy {
    public static SurfaceDataProxy createProxy(SurfaceData srcData,
                                               MTLGraphicsConfig dstConfig)
    {
        if (srcData instanceof MTLSurfaceData) {
            // srcData must be a VolatileImage which either matches
            // our pixel format or not - either way we do not cache it...
            return UNCACHED;
        }

        return new MTLSurfaceDataProxy(dstConfig, srcData.getTransparency());
    }

    MTLGraphicsConfig mtlgc;
    int transparency;

    public MTLSurfaceDataProxy(MTLGraphicsConfig mtlgc, int transparency) {
        this.mtlgc = mtlgc;
        this.transparency = transparency;
    }

    @Override
    public SurfaceData validateSurfaceData(SurfaceData srcData,
                                           SurfaceData cachedData,
                                           int w, int h)
    {
        if (cachedData == null) {
            try {
                cachedData = mtlgc.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);
    }
}