1 files changed, 36 insertions, 0 deletions
diff --git a/iconloaderlib/src/com/android/launcher3/icons/GraphicsUtils.java b/iconloaderlib/src/com/android/launcher3/icons/GraphicsUtils.java
new file mode 100644
index 000000000..b096cecb5
--- /dev/null
+++ b/iconloaderlib/src/com/android/launcher3/icons/GraphicsUtils.java
@@ -0,0 +1,36 @@
+/*
+ * 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 androidx.annotation.ColorInt;
+
+public class 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);
+    }
+}