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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.Paint;
import android.graphics.Rect;
public class ImageFilterStraighten extends ImageFilter {
private final Bitmap.Config mConfig = Bitmap.Config.ARGB_8888;
private float mRotation;
private float mZoomFactor;
public ImageFilterStraighten() {
mName = "Straighten";
}
@Override
public ImageFilter clone() throws CloneNotSupportedException {
// FIXME: clone() should not be needed. Remove when we fix geometry.
ImageFilterStraighten filter = (ImageFilterStraighten) super.clone();
filter.mRotation = mRotation;
filter.mZoomFactor = mZoomFactor;
return filter;
}
public ImageFilterStraighten(float rotation, float zoomFactor) {
mRotation = rotation;
mZoomFactor = zoomFactor;
}
public void setRotation(float rotation) {
mRotation = rotation;
}
public void setRotationZoomFactor(float zoomFactor) {
mZoomFactor = zoomFactor;
}
@Override
public void useRepresentation(FilterRepresentation representation) {
}
@Override
public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) {
// TODO: implement bilinear or bicubic here... for now, just use
// canvas to do a simple implementation...
// TODO: and be more memory efficient! (do it in native?)
Bitmap temp = bitmap.copy(mConfig, true);
Canvas canvas = new Canvas(temp);
canvas.save();
Rect bounds = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
float w = temp.getWidth();
float h = temp.getHeight();
float mw = temp.getWidth() / 2.0f;
float mh = temp.getHeight() / 2.0f;
canvas.scale(mZoomFactor, mZoomFactor, mw, mh);
canvas.rotate(mRotation, mw, mh);
canvas.drawBitmap(bitmap, bounds, bounds, new Paint());
canvas.restore();
int[] pixels = new int[(int) (w * h)];
temp.getPixels(pixels, 0, (int) w, 0, 0, (int) w, (int) h);
bitmap.setPixels(pixels, 0, (int) w, 0, 0, (int) w, (int) h);
temp.recycle();
temp = null;
pixels = null;
return bitmap;
}
}
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