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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
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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 com.sun.scenario.effect.impl.state;

import com.sun.scenario.effect.Color4f;

The helper class for defining a 1 dimensional linear convolution shadow kernel for the Gaussian Shadow shader. This class leverages the GaussianBlurState class for defining the kernel and simply stores additional shadowColor and spread properties for the associated support methods for the shadow version of the shader. /**
 * The helper class for defining a 1 dimensional linear convolution shadow
 * kernel for the Gaussian Shadow shader.  This class leverages the
 * {@link GaussianBlurState} class for defining the kernel and simply stores
 * additional {@code shadowColor} and {@code spread} properties for the
 * associated support methods for the shadow version of the shader.
 */
public class GaussianShadowState extends GaussianBlurState {
    private Color4f shadowColor;
    private float spread;

    @Override
    void checkRadius(float radius) {
        if (radius < 0f || radius > 127f) {
            throw new IllegalArgumentException("Radius must be in the range [1,127]");
        }
    }

    @Override
    public Color4f getShadowColor() {
        return shadowColor;
    }

    public void setShadowColor(Color4f shadowColor) {
        if (shadowColor == null) {
            throw new IllegalArgumentException("Color must be non-null");
        }
        this.shadowColor = shadowColor;
    }

    @Override
    public float getSpread() {
        return spread;
    }

    public void setSpread(float spread) {
        if (spread < 0f || spread > 1f) {
            throw new IllegalArgumentException("Spread must be in the range [0,1]");
        }
        this.spread = spread;
    }

    @Override
    public boolean isNop() {
        // The shadow operation is never a NOP since it replaces the colors
        // if nothing else.
        return false;
    }

    @Override
    public boolean isShadow() {
        return true;
    }
}