Rakesh Iyer | 2c93940 | 2016-10-19 23:26:02 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package com.android.car.apps.common; |
| 17 | |
Arnaud Berry | 38f9976 | 2019-07-08 15:32:51 -0700 | [diff] [blame] | 18 | import static android.graphics.Bitmap.Config.ARGB_8888; |
| 19 | |
Arnaud Berry | 02b2a4d | 2019-08-19 11:20:26 -0700 | [diff] [blame] | 20 | import android.content.Context; |
| 21 | import android.content.res.Resources; |
Rakesh Iyer | 2c93940 | 2016-10-19 23:26:02 -0700 | [diff] [blame] | 22 | import android.graphics.Bitmap; |
Arnaud Berry | 38f9976 | 2019-07-08 15:32:51 -0700 | [diff] [blame] | 23 | import android.graphics.Canvas; |
| 24 | import android.graphics.Matrix; |
| 25 | import android.graphics.Paint; |
| 26 | import android.graphics.RectF; |
| 27 | import android.graphics.drawable.BitmapDrawable; |
| 28 | import android.graphics.drawable.Drawable; |
Rakesh Iyer | 2c93940 | 2016-10-19 23:26:02 -0700 | [diff] [blame] | 29 | import android.util.Log; |
Arnaud Berry | 38f9976 | 2019-07-08 15:32:51 -0700 | [diff] [blame] | 30 | import android.util.Size; |
Rakesh Iyer | 2c93940 | 2016-10-19 23:26:02 -0700 | [diff] [blame] | 31 | |
Arnaud Berry | 8fa9449 | 2020-03-10 13:25:14 -0700 | [diff] [blame] | 32 | import androidx.annotation.ColorInt; |
| 33 | import androidx.annotation.NonNull; |
| 34 | import androidx.annotation.Nullable; |
| 35 | |
Rakesh Iyer | 2c93940 | 2016-10-19 23:26:02 -0700 | [diff] [blame] | 36 | public class BitmapUtils { |
| 37 | private static final String TAG = "BitmapUtils"; |
| 38 | |
| 39 | /** |
| 40 | * Scales a bitmap while preserving the proportions such that both dimensions are the smallest |
| 41 | * values possible that are equal to or larger than the given dimensions. |
| 42 | * |
| 43 | * This function can be a few times as expensive as Bitmap.createScaledBitmap with |
| 44 | * filtering when downscaling, but it produces much nicer results. |
| 45 | * |
| 46 | * @param bm The bitmap to scale. |
| 47 | * @param width The desired width. |
| 48 | * @param height The desired height. |
| 49 | * @return The scaled bitmap, or the original bitmap if scaling was not necessary. |
| 50 | */ |
| 51 | public static Bitmap scaleBitmap(Bitmap bm, int width, int height) { |
| 52 | if (bm == null || (bm.getHeight() == height && bm.getWidth() == width)) { |
| 53 | return bm; |
| 54 | } |
| 55 | |
| 56 | float heightScale = 1f; |
| 57 | if (bm.getHeight() > height) { |
| 58 | heightScale = (float) height / bm.getHeight(); |
| 59 | } |
| 60 | float widthScale = 1f; |
| 61 | if (bm.getWidth() > width) { |
| 62 | widthScale = (float) width / bm.getWidth(); |
| 63 | } |
| 64 | float scale = heightScale > widthScale ? heightScale : widthScale; |
| 65 | int scaleWidth = (int) Math.ceil(bm.getWidth() * scale); |
| 66 | int scaleHeight = (int) Math.ceil(bm.getHeight() * scale); |
| 67 | |
| 68 | Bitmap scaledBm = bm; |
| 69 | // If you try to scale an image down too much in one go, you can end up with discontinuous |
| 70 | // interpolation. Therefore, if necessary, we scale the image to twice the desired size |
| 71 | // and do a second scaling to the desired size, which smooths jaggedness from the first go. |
| 72 | if (scale < .5f) { |
| 73 | scaledBm = Bitmap.createScaledBitmap(scaledBm, scaleWidth * 2, scaleHeight * 2, true); |
| 74 | } |
| 75 | |
| 76 | if (scale != 1f) { |
| 77 | Bitmap newScaledBitmap = Bitmap |
| 78 | .createScaledBitmap(scaledBm, scaleWidth, scaleHeight, true); |
| 79 | if (scaledBm != bm) { |
| 80 | scaledBm.recycle(); |
| 81 | } |
| 82 | scaledBm = newScaledBitmap; |
| 83 | } |
| 84 | return scaledBm; |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Crops the given bitmap to a centered rectangle of the given dimensions. |
| 89 | * |
| 90 | * @param bm the bitmap to crop. |
| 91 | * @param width the width to crop to. |
| 92 | * @param height the height to crop to. |
| 93 | * @return The cropped bitmap, or the original if no cropping was necessary. |
| 94 | */ |
| 95 | public static Bitmap cropBitmap(Bitmap bm, int width, int height) { |
| 96 | if (bm == null) { |
| 97 | return bm; |
| 98 | } |
| 99 | if (bm.getHeight() < height || bm.getWidth() < width) { |
| 100 | if (Log.isLoggable(TAG, Log.INFO)) { |
| 101 | Log.i(TAG, String.format( |
| 102 | "Can't crop bitmap to larger dimensions (%d, %d) -> (%d, %d).", |
| 103 | bm.getWidth(), bm.getHeight(), width, height)); |
| 104 | } |
| 105 | return bm; |
| 106 | } |
| 107 | int x = (bm.getWidth() - width) / 2; |
| 108 | int y =(bm.getHeight() - height) / 2; |
| 109 | return Bitmap.createBitmap(bm, x, y, width, height); |
| 110 | } |
Arnaud Berry | 38f9976 | 2019-07-08 15:32:51 -0700 | [diff] [blame] | 111 | |
| 112 | /** Creates a copy of the given bitmap and applies the given color over the result */ |
| 113 | @Nullable |
| 114 | public static Bitmap createTintedBitmap(@Nullable Bitmap image, @ColorInt int colorOverlay) { |
| 115 | if (image == null) return null; |
| 116 | Bitmap clone = Bitmap.createBitmap(image.getWidth(), image.getHeight(), ARGB_8888); |
| 117 | Canvas canvas = new Canvas(clone); |
| 118 | canvas.drawBitmap(image, 0f, 0f, new Paint()); |
| 119 | canvas.drawColor(colorOverlay); |
| 120 | return clone; |
| 121 | } |
| 122 | |
Arnaud Berry | 02b2a4d | 2019-08-19 11:20:26 -0700 | [diff] [blame] | 123 | /** Returns a tinted drawable if flagging is enabled and the given drawable is a bitmap. */ |
| 124 | @NonNull |
| 125 | public static Drawable maybeFlagDrawable(@NonNull Context context, @NonNull Drawable drawable) { |
| 126 | if (drawable instanceof BitmapDrawable) { |
| 127 | CommonFlags flags = CommonFlags.getInstance(context); |
| 128 | Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap(); |
| 129 | if (flags.shouldFlagImproperImageRefs() && bitmap != null) { |
| 130 | Resources res = context.getResources(); |
| 131 | int tint = context.getColor(R.color.improper_image_refs_tint_color); |
| 132 | drawable = new BitmapDrawable(res, BitmapUtils.createTintedBitmap(bitmap, tint)); |
| 133 | } |
| 134 | } |
| 135 | return drawable; |
| 136 | } |
| 137 | |
Arnaud Berry | 38f9976 | 2019-07-08 15:32:51 -0700 | [diff] [blame] | 138 | /** Renders the drawable into a bitmap if needed. */ |
| 139 | public static Bitmap fromDrawable(Drawable drawable, @Nullable Size bitmapSize) { |
| 140 | if (drawable instanceof BitmapDrawable) { |
| 141 | BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable; |
| 142 | if (bitmapDrawable.getBitmap() != null) { |
| 143 | return bitmapDrawable.getBitmap(); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | Matrix matrix = new Matrix(); |
| 148 | if (drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) { |
| 149 | bitmapSize = new Size(1, 1); |
| 150 | drawable.setBounds(0, 0, bitmapSize.getWidth(), bitmapSize.getHeight()); |
| 151 | } else { |
| 152 | if (bitmapSize == null) { |
| 153 | bitmapSize = new Size(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight()); |
| 154 | } |
| 155 | drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight()); |
| 156 | RectF srcR = new RectF(0f, 0f, drawable.getIntrinsicWidth(), |
| 157 | drawable.getIntrinsicHeight()); |
| 158 | RectF dstR = new RectF(0f, 0f, bitmapSize.getWidth(), bitmapSize.getHeight()); |
| 159 | matrix.setRectToRect(srcR, dstR, Matrix.ScaleToFit.CENTER); |
| 160 | } |
| 161 | |
| 162 | Bitmap bitmap = Bitmap.createBitmap(bitmapSize.getWidth(), bitmapSize.getHeight(), |
| 163 | Bitmap.Config.ARGB_8888); |
| 164 | |
| 165 | Canvas canvas = new Canvas(bitmap); |
| 166 | canvas.setMatrix(matrix); |
| 167 | drawable.draw(canvas); |
| 168 | |
| 169 | return bitmap; |
| 170 | } |
Rakesh Iyer | 2c93940 | 2016-10-19 23:26:02 -0700 | [diff] [blame] | 171 | } |