Add gl file

app/src/main/java/com/hippo/gl/util/GalleryUtils.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2010 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.hippo.gl.util;
+
+import android.graphics.Color;
+
+import com.hippo.yorozuya.AssertUtils;
+
+public class GalleryUtils {
+
+    private static final String TAG = "GalleryUtils";
+
+    public static float[] intColorToFloatARGBArray(int from) {
+        return new float[] {
+            Color.alpha(from) / 255f,
+            Color.red(from) / 255f,
+            Color.green(from) / 255f,
+            Color.blue(from) / 255f
+        };
+    }
+
+    public static int floatARGBArrayTointColor(float[] from) {
+        return Color.argb((int) (from[0] * 255), (int) (from[1] * 255), (int) (from[2] * 255), (int) (from[3] * 255));
+    }
+
+    // Below are used the detect using database in the render thread. It only
+    // works most of the time, but that's ok because it's for debugging only.
+
+    private static volatile Thread sCurrentThread;
+
+    public static void setRenderThread() {
+        sCurrentThread = Thread.currentThread();
+    }
+
+    public static boolean isRenderThread() {
+        return sCurrentThread == Thread.currentThread();
+    }
+
+    public static void assertInRenderThread() {
+        AssertUtils.assertEquals("Should not do this in render thread", sCurrentThread, Thread.currentThread());
+    }
+}