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/*
* Copyright (C) 2018 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.launcher3.icons;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.graphics.Region;
import android.graphics.RegionIterator;
import android.util.Log;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import androidx.annotation.ColorInt;
public class GraphicsUtils {
private static final String TAG = "GraphicsUtils";
/**
* Set the alpha component of {@code color} to be {@code alpha}. Unlike the support lib version,
* it bounds the alpha in valid range instead of throwing an exception to allow for safer
* interpolation of color animations
*/
@ColorInt
public static int setColorAlphaBound(int color, int alpha) {
if (alpha < 0) {
alpha = 0;
} else if (alpha > 255) {
alpha = 255;
}
return (color & 0x00ffffff) | (alpha << 24);
}
/**
* Compresses the bitmap to a byte array for serialization.
*/
public static byte[] flattenBitmap(Bitmap bitmap) {
// Try go guesstimate how much space the icon will take when serialized
// to avoid unnecessary allocations/copies during the write (4 bytes per pixel).
int size = bitmap.getWidth() * bitmap.getHeight() * 4;
ByteArrayOutputStream out = new ByteArrayOutputStream(size);
try {
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
out.flush();
out.close();
return out.toByteArray();
} catch (IOException e) {
Log.w(TAG, "Could not write bitmap");
return null;
}
}
public static int getArea(Region r) {
RegionIterator itr = new RegionIterator(r);
int area = 0;
Rect tempRect = new Rect();
while (itr.next(tempRect)) {
area += tempRect.width() * tempRect.height();
}
return area;
}
}
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