| /* |
| * 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 androidx.annotation.ColorInt; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| |
| public class GraphicsUtils { |
| |
| private static final String TAG = "GraphicsUtils"; |
| |
| public static Runnable sOnNewBitmapRunnable = () -> { }; |
| |
| /** |
| * 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; |
| } |
| |
| /** |
| * Utility method to track new bitmap creation |
| */ |
| public static void noteNewBitmapCreated() { |
| sOnNewBitmapRunnable.run(); |
| } |
| } |