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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.gallery3d.filtershow.filters;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import com.android.gallery3d.app.Log;
public class ImageFilterVignette extends SimpleImageFilter {
private static final String LOGTAG = "ImageFilterVignette";
public ImageFilterVignette() {
mName = "Vignette";
}
@Override
public FilterRepresentation getDefaultRepresentation() {
FilterVignetteRepresentation representation = new FilterVignetteRepresentation();
return representation;
}
native protected void nativeApplyFilter(
Bitmap bitmap, int w, int h, int cx, int cy, float radx, float rady, float strength);
private float calcRadius(float cx, float cy, int w, int h) {
float d = cx;
if (d < (w - cx)) {
d = w - cx;
}
if (d < cy) {
d = cy;
}
if (d < (h - cy)) {
d = h - cy;
}
return d * d * 2.0f;
}
@Override
public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) {
FilterVignetteRepresentation rep = (FilterVignetteRepresentation) getParameters();
if (rep == null) {
return bitmap;
}
int w = bitmap.getWidth();
int h = bitmap.getHeight();
float value = rep.getValue() / 100.0f;
float cx = w / 2;
float cy = h / 2;
float r = calcRadius(cx, cy, w, h);
float rx = r;
float ry = r;
if (rep.isCenterSet()) {
Matrix m = getOriginalToScreenMatrix(w, h);
cx = rep.getCenterX();
cy = rep.getCenterY();
float[] center = new float[] { cx, cy };
m.mapPoints(center);
cx = center[0];
cy = center[1];
rx = m.mapRadius(rep.getRadiusX());
ry = m.mapRadius(rep.getRadiusY());
}
nativeApplyFilter(bitmap, w, h, (int) cx, (int) cy, rx, ry, value);
return bitmap;
}
}
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