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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.Canvas;
import android.graphics.Rect;
import com.android.gallery3d.R;
import com.android.gallery3d.filtershow.cache.ImageLoader;
public class ImageFilterDownsample extends SimpleImageFilter {
private static final int ICON_DOWNSAMPLE_FRACTION = 8;
private ImageLoader mImageLoader;
public ImageFilterDownsample(ImageLoader loader) {
mName = "Downsample";
mImageLoader = loader;
}
public FilterRepresentation getDefaultRepresentation() {
FilterBasicRepresentation representation = (FilterBasicRepresentation) super.getDefaultRepresentation();
representation.setName("Downsample");
representation.setFilterClass(ImageFilterDownsample.class);
representation.setMaximum(100);
representation.setMinimum(1);
representation.setValue(50);
representation.setDefaultValue(50);
representation.setPreviewValue(3);
return representation;
}
@Override
public int getButtonId() {
return R.id.downsampleButton;
}
@Override
public int getTextId() {
return R.string.downsample;
}
@Override
public Bitmap apply(Bitmap bitmap, float scaleFactor, boolean highQuality) {
if (getParameters() == null) {
return bitmap;
}
int w = bitmap.getWidth();
int h = bitmap.getHeight();
int p = getParameters().getValue();
// size of original precached image
Rect size = mImageLoader.getOriginalBounds();
int orig_w = size.width();
int orig_h = size.height();
if (p > 0 && p < 100) {
// scale preview to same size as the resulting bitmap from a "save"
int newWidth = orig_w * p / 100;
int newHeight = orig_h * p / 100;
// only scale preview if preview isn't already scaled enough
if (newWidth <= 0 || newHeight <= 0 || newWidth >= w || newHeight >= h) {
return bitmap;
}
Bitmap ret = Bitmap.createScaledBitmap(bitmap, newWidth, newHeight, true);
if (ret != bitmap) {
bitmap.recycle();
}
return ret;
}
return bitmap;
}
@Override
public Bitmap iconApply(Bitmap bitmap, float scaleFactor, boolean highQuality) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Bitmap ret = Bitmap.createScaledBitmap(bitmap, w / ICON_DOWNSAMPLE_FRACTION, h
/ ICON_DOWNSAMPLE_FRACTION, false);
Rect dst = new Rect(0, 0, w, h);
Rect src = new Rect(0, 0, w / ICON_DOWNSAMPLE_FRACTION, h / ICON_DOWNSAMPLE_FRACTION);
Canvas c = new Canvas(bitmap);
c.drawBitmap(ret, src, dst, null);
return bitmap;
}
}
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