Update Dialer source to latest internal Google revision.

Previously, Android's Dialer app was developed in an internal Google
source control system and only exported to public during AOSP drops.

The Dialer team is now switching to a public development model similar
to the telephony team.

This CL represents all internal Google changes that were committed to
Dialer between the public O release and today's tip of tree on internal
master. This CL squashes those changes into a single commit.
In subsequent changes, changes will be exported on a per-commit basis.

Test: make, flash install, run
Merged-In: I45270eaa8ce732d71a1bd84b08c7fa0e99af3160
Change-Id: I529aaeb88535b9533c0ae4ef4e6c1222d4e0f1c8
PiperOrigin-RevId: 167068436

1 files changed, 141 insertions, 0 deletions

diff --git a/java/com/android/dialer/contactphoto/BitmapUtil.java b/java/com/android/dialer/contactphoto/BitmapUtil.java
new file mode 100644
index 000000000..36055e2c1
--- /dev/null
+++ b/java/com/android/dialer/contactphoto/BitmapUtil.java
@@ -0,0 +1,141 @@
+/*
+ * 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.dialer.contactphoto;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.PorterDuff.Mode;
+import android.graphics.PorterDuffXfermode;
+import android.graphics.Rect;
+import android.graphics.RectF;
+
+/** Provides static functions to decode bitmaps at the optimal size */
+public class BitmapUtil {
+
+  private BitmapUtil() {}
+
+  /**
+   * Returns Width or Height of the picture, depending on which size is smaller. Doesn't actually
+   * decode the picture, so it is pretty efficient to run.
+   */
+  public static int getSmallerExtentFromBytes(byte[] bytes) {
+    final BitmapFactory.Options options = new BitmapFactory.Options();
+
+    // don't actually decode the picture, just return its bounds
+    options.inJustDecodeBounds = true;
+    BitmapFactory.decodeByteArray(bytes, 0, bytes.length, options);
+
+    // test what the best sample size is
+    return Math.min(options.outWidth, options.outHeight);
+  }
+
+  /**
+   * Finds the optimal sampleSize for loading the picture
+   *
+   * @param originalSmallerExtent Width or height of the picture, whichever is smaller
+   * @param targetExtent Width or height of the target view, whichever is bigger.
+   *     <p>If either one of the parameters is 0 or smaller, no sampling is applied
+   */
+  public static int findOptimalSampleSize(int originalSmallerExtent, int targetExtent) {
+    // If we don't know sizes, we can't do sampling.
+    if (targetExtent < 1) {
+      return 1;
+    }
+    if (originalSmallerExtent < 1) {
+      return 1;
+    }
+
+    // Test what the best sample size is. To do that, we find the sample size that gives us
+    // the best trade-off between resulting image size and memory requirement. We allow
+    // the down-sampled image to be 20% smaller than the target size. That way we can get around
+    // unfortunate cases where e.g. a 720 picture is requested for 362 and not down-sampled at
+    // all. Why 20%? Why not. Prove me wrong.
+    int extent = originalSmallerExtent;
+    int sampleSize = 1;
+    while ((extent >> 1) >= targetExtent * 0.8f) {
+      sampleSize <<= 1;
+      extent >>= 1;
+    }
+
+    return sampleSize;
+  }
+
+  /** Decodes the bitmap with the given sample size */
+  public static Bitmap decodeBitmapFromBytes(byte[] bytes, int sampleSize) {
+    final BitmapFactory.Options options;
+    if (sampleSize <= 1) {
+      options = null;
+    } else {
+      options = new BitmapFactory.Options();
+      options.inSampleSize = sampleSize;
+    }
+    return BitmapFactory.decodeByteArray(bytes, 0, bytes.length, options);
+  }
+
+  /**
+   * Given an input bitmap, scales it to the given width/height and makes it round.
+   *
+   * @param input {@link Bitmap} to scale and crop
+   * @param targetWidth desired output width
+   * @param targetHeight desired output height
+   * @return output bitmap scaled to the target width/height and cropped to an oval. The cropping
+   *     algorithm will try to fit as much of the input into the output as possible, while
+   *     preserving the target width/height ratio.
+   */
+  public static Bitmap getRoundedBitmap(Bitmap input, int targetWidth, int targetHeight) {
+    if (input == null) {
+      return null;
+    }
+    final Bitmap.Config inputConfig = input.getConfig();
+    final Bitmap result =
+        Bitmap.createBitmap(
+            targetWidth, targetHeight, inputConfig != null ? inputConfig : Bitmap.Config.ARGB_8888);
+    final Canvas canvas = new Canvas(result);
+    final Paint paint = new Paint();
+    canvas.drawARGB(0, 0, 0, 0);
+    paint.setAntiAlias(true);
+    final RectF dst = new RectF(0, 0, targetWidth, targetHeight);
+    canvas.drawOval(dst, paint);
+
+    // Specifies that only pixels present in the destination (i.e. the drawn oval) should
+    // be overwritten with pixels from the input bitmap.
+    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
+
+    final int inputWidth = input.getWidth();
+    final int inputHeight = input.getHeight();
+
+    // Choose the largest scale factor that will fit inside the dimensions of the
+    // input bitmap.
+    final float scaleBy =
+        Math.min((float) inputWidth / targetWidth, (float) inputHeight / targetHeight);
+
+    final int xCropAmountHalved = (int) (scaleBy * targetWidth / 2);
+    final int yCropAmountHalved = (int) (scaleBy * targetHeight / 2);
+
+    final Rect src =
+        new Rect(
+            inputWidth / 2 - xCropAmountHalved,
+            inputHeight / 2 - yCropAmountHalved,
+            inputWidth / 2 + xCropAmountHalved,
+            inputHeight / 2 + yCropAmountHalved);
+
+    canvas.drawBitmap(input, src, dst, paint);
+    return result;
+  }
+}