126 lines
3.4 KiB
Java
126 lines
3.4 KiB
Java
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.mariotaku.gallery3d.util;
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import android.content.Context;
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import android.graphics.Color;
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import android.util.DisplayMetrics;
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import android.util.Log;
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import android.view.WindowManager;
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import java.io.Closeable;
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public class GalleryUtils {
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private static float sPixelDensity = -1f;
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private static final String TAG = "Utils";
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// Throws AssertionError if the input is false.
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public static void assertTrue(final boolean cond) {
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if (!cond) throw new AssertionError();
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}
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public static int ceilLog2(final float value) {
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int i;
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for (i = 0; i < 31; i++) {
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if (1 << i >= value) {
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break;
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}
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}
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return i;
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}
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// Throws NullPointerException if the input is null.
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public static <T> T checkNotNull(final T object) {
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if (object == null) throw new NullPointerException();
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return object;
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}
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// Returns the input value x clamped to the range [min, max].
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public static float clamp(final float x, final float min, final float max) {
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if (x > max) return max;
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if (x < min) return min;
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return x;
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}
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// Returns the input value x clamped to the range [min, max].
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public static int clamp(final int x, final int min, final int max) {
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if (x > max) return max;
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if (x < min) return min;
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return x;
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}
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public static void closeSilently(final Closeable c) {
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if (c == null) return;
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try {
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c.close();
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} catch (final Throwable t) {
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Log.w(TAG, "close fail", t);
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}
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}
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public static int dpToPixel(final int dp) {
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return Math.round(dpToPixel((float) dp));
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}
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public static int floorLog2(final float value) {
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int i;
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for (i = 0; i < 31; i++) {
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if (1 << i > value) {
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break;
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}
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}
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return i - 1;
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}
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public static void initialize(final Context context) {
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final DisplayMetrics metrics = new DisplayMetrics();
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final WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
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wm.getDefaultDisplay().getMetrics(metrics);
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sPixelDensity = metrics.density;
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}
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public static float[] intColorToFloatARGBArray(final int from) {
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return new float[] { Color.alpha(from) / 255f, Color.red(from) / 255f, Color.green(from) / 255f,
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Color.blue(from) / 255f };
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}
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public static boolean isHighResolution(final Context context) {
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final DisplayMetrics metrics = new DisplayMetrics();
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final WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
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wm.getDefaultDisplay().getMetrics(metrics);
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return metrics.heightPixels > 2048 || metrics.widthPixels > 2048;
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}
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public static boolean isOpaque(final int color) {
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return color >>> 24 == 0xFF;
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}
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public static void waitWithoutInterrupt(final Object object) {
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try {
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object.wait();
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} catch (final InterruptedException e) {
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Log.w(TAG, "unexpected interrupt: " + object);
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}
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}
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private static float dpToPixel(final float dp) {
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return sPixelDensity * dp;
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}
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}
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