From 1878585429e0579bfd1c2ca8af12a831fb23903d Mon Sep 17 00:00:00 2001
From: Gonzalo Toledano <Gnzlt@users.noreply.github.com>
Date: Fri, 14 Dec 2018 20:01:29 +0100
Subject: [PATCH] Add BitmapTransformation to rotate the image (#3444)

* Added BitmapTransformation for rotation

* Improved override methods
---
 .../glide/load/resource/bitmap/Rotate.java    | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 library/src/main/java/com/bumptech/glide/load/resource/bitmap/Rotate.java

diff --git a/library/src/main/java/com/bumptech/glide/load/resource/bitmap/Rotate.java b/library/src/main/java/com/bumptech/glide/load/resource/bitmap/Rotate.java
new file mode 100644
index 0000000000..e732f48dc7
--- /dev/null
+++ b/library/src/main/java/com/bumptech/glide/load/resource/bitmap/Rotate.java
@@ -0,0 +1,55 @@
+package com.bumptech.glide.load.resource.bitmap;
+
+import android.graphics.Bitmap;
+import android.support.annotation.NonNull;
+import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
+import com.bumptech.glide.util.Util;
+import java.nio.ByteBuffer;
+import java.security.MessageDigest;
+
+/**
+ * A {@link BitmapTransformation} which rotates the bitmap.
+ */
+public class Rotate extends BitmapTransformation {
+  private static final String ID = "com.bumptech.glide.load.resource.bitmap.Rotate";
+  private static final byte[] ID_BYTES = ID.getBytes(CHARSET);
+
+  private final int degreesToRotate;
+
+  /**
+    * @param degreesToRotate number of degrees to rotate the image by. If zero the original image is
+    *                        not modified.
+   */
+  public Rotate(int degreesToRotate) {
+    this.degreesToRotate = degreesToRotate;
+  }
+
+  @Override
+  protected Bitmap transform(
+      @NonNull BitmapPool pool, @NonNull Bitmap toTransform, int outWidth, int outHeight) {
+    return TransformationUtils.rotateImage(toTransform, degreesToRotate);
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (o instanceof Rotate) {
+      Rotate other = (Rotate) o;
+      return degreesToRotate == other.degreesToRotate;
+    }
+    return false;
+  }
+
+  @Override
+  public int hashCode() {
+    return Util.hashCode(ID.hashCode(),
+            Util.hashCode(degreesToRotate));
+  }
+
+  @Override
+  public void updateDiskCacheKey(@NonNull MessageDigest messageDigest) {
+    messageDigest.update(ID_BYTES);
+
+    byte[] degreesData = ByteBuffer.allocate(4).putInt(degreesToRotate).array();
+    messageDigest.update(degreesData);
+  }
+}