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 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package com.sun.scenario.effect.impl.prism;

import com.sun.scenario.effect.Effect;
import com.sun.scenario.effect.FilterContext;
import com.sun.scenario.effect.ImageData;
import com.sun.scenario.effect.Merge;
import com.sun.scenario.effect.impl.EffectPeer;
import com.sun.scenario.effect.impl.Renderer;
import com.sun.javafx.geom.Rectangle;
import com.sun.javafx.geom.transform.BaseTransform;
import com.sun.prism.Graphics;
import com.sun.scenario.effect.impl.state.RenderState;

public class PrMergePeer extends EffectPeer {

    public PrMergePeer(FilterContext fctx, Renderer r, String uniqueName) {
        super(fctx, r, uniqueName);
    }

    @Override
    public ImageData filter(Effect effect,
                            RenderState rstate,
                            BaseTransform transform,
                            Rectangle outputClip,
                            ImageData... inputs)
    {
        FilterContext fctx = getFilterContext();
        Merge merge = (Merge)effect;

        Rectangle unionbounds = merge.getResultBounds(transform, outputClip, inputs);
        PrDrawable dst = (PrDrawable)getRenderer().
            getCompatibleImage(unionbounds.width, unionbounds.height);
        if (dst == null) {
            return new ImageData(fctx, null, unionbounds);
        }

        Graphics gdst = dst.createGraphics();
        for (ImageData input : inputs) {
            PrEffectHelper.renderImageData(gdst, input, unionbounds);
        }

        return new ImageData(fctx, dst, unionbounds);
    }
}