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package com.android.gallery3d.filtershow.filters;
import android.graphics.Bitmap;
import com.android.gallery3d.filtershow.ui.ControlPoint;
import com.android.gallery3d.filtershow.ui.Spline;
public class ImageFilterShadows extends ImageFilter {
private final float SHADOW = .1f;
private final float MID = .5f;
private final float HIGHLIGHT = .9f;
private float []baseX = {0f,SHADOW,MID,HIGHLIGHT,1f};
private float []baseY = {0f,SHADOW,MID,HIGHLIGHT,1f};
public ImageFilterShadows() {
mName = "Shadows";
}
short [] calcMap(){
Spline sp = new Spline();
for (int i = 0; i < baseX.length; i++) {
sp.addPoint(baseX[i], baseY[i]);
}
int max = 4080;
int w = 40800;
float []px = new float[w+1];
float []py = new float[w+1];
short []vlut = new short[4080+1];
for (int i = 0; i < px.length; i++) {
float t = i/(float)(w);
ControlPoint p = sp.getPoint(t);
px[i] = p.x;
py[i] = p.y;
}
for (int i = 0; i < py.length; i++) {
short x = (short)Math.min(4080,Math.max(0,((int)(px[i]*max))));
short y = (short)Math.min(4082,Math.max(0,((int)(py[i]*max))));
vlut[x] = y;
}
return vlut;
}
@Override
public ImageFilter clone() throws CloneNotSupportedException {
ImageFilterShadows filter = (ImageFilterShadows) super.clone();
return filter;
}
native protected void nativeApplyFilter(Bitmap bitmap, int w, int h, short []valMap);
public void apply(Bitmap bitmap) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
float p = mParameter;
baseY[1] = (float)(SHADOW*Math.pow(4, mParameter/100.));
nativeApplyFilter(bitmap, w, h, calcMap());
}
}
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