com.sun.scenario.effect.impl.state.ZoomRadialBlurState Maven / Gradle / Ivy
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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
* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package com.sun.scenario.effect.impl.state;
import com.sun.scenario.effect.ZoomRadialBlur;
public class ZoomRadialBlurState {
private float dx = -1f;
private float dy = -1f;
private final ZoomRadialBlur effect;
public ZoomRadialBlurState(ZoomRadialBlur effect) {
this.effect = effect;
}
public int getRadius() {
return effect.getRadius();
}
/**
* Updates offsets by X and Y axes.
*/
public void updateDeltas(float dx, float dy) {
this.dx = dx;
this.dy = dy;
}
/**
* Invalidates X and Y offsets.
*/
public void invalidateDeltas() {
this.dx = -1f;
this.dy = -1f;
}
/**
* Returns offset by X axis to the next pixel
* @return offset by X axis to the next pixel
*/
public float getDx() {
return dx;
}
/**
* Returns offset by Y axis to the next pixel
* @return offset by Y axis to the next pixel
*/
public float getDy() {
return dy;
}
public int getNumSteps() {
int r = getRadius();
return r * 2 + 1;
}
public float getAlpha() {
float r = getRadius();
return 1.0f/(2.0f*r + 1.0f);
}
}