/*
 *   Copyright (c) 2017.  HSJ
 *
 *    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.hsj.common.utils;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffColorFilter;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Shader;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.media.ExifInterface;
import android.renderscript.Allocation;
import android.renderscript.Element;
import android.renderscript.RenderScript;
import android.renderscript.ScriptIntrinsicBlur;
import android.support.annotation.ColorInt;
import android.support.annotation.DrawableRes;
import android.support.annotation.FloatRange;
import android.support.annotation.IntRange;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.view.View;

import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * @Author:HSJ
 * @E-mail:[email protected]
 * @Date:2018/2/4/18:16
 * @Version:V1.0
 * @Class:BitmapUtils
 * @Description:Bitmap工具类
 */
public class BitmapUtils {

    private BitmapUtils() {
    }

    /**
     * bitmap 转 byteArr
     *
     * @param bitmap bitmap 对象
     * @param format 格式
     * @return 字节数组
     */
    public static byte[] bitmap2Bytes(@NonNull Bitmap bitmap, @NonNull Bitmap.CompressFormat format) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bitmap.compress(format, 100, baos);
        return baos.toByteArray();
    }

    /**
     * byteArr 转 bitmap
     *
     * @param bytes 字节数组
     * @return bitmap
     */
    public static Bitmap bytes2Bitmap(@NonNull byte[] bytes) {
        return (bytes.length == 0) ? null : BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
    }

    /**
     * drawable 转 bitmap
     *
     * @param drawable drawable 对象
     * @return bitmap
     */
    public static Bitmap drawable2Bitmap(@NonNull Drawable drawable) {
        if (drawable instanceof BitmapDrawable) {
            BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
            if (bitmapDrawable.getBitmap() != null) {
                return bitmapDrawable.getBitmap();
            }
        }
        Bitmap bitmap;
        if (drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
            bitmap = Bitmap.createBitmap(1, 1,
                    drawable.getOpacity() != PixelFormat.OPAQUE
                            ? Bitmap.Config.ARGB_8888
                            : Bitmap.Config.RGB_565);
        } else {
            bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),
                    drawable.getIntrinsicHeight(),
                    drawable.getOpacity() != PixelFormat.OPAQUE
                            ? Bitmap.Config.ARGB_8888
                            : Bitmap.Config.RGB_565);
        }
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);
        return bitmap;
    }

    /**
     * bitmap 转 drawable
     *
     * @param bitmap bitmap 对象
     * @return drawable
     */
    public static Drawable bitmap2Drawable(@NonNull Context context, @NonNull Bitmap bitmap) {
        return new BitmapDrawable(context.getResources(), bitmap);
    }

    /**
     * drawable 转 byteArr
     *
     * @param drawable drawable 对象
     * @param format   格式
     * @return 字节数组
     */
    public static byte[] drawable2Bytes(@NonNull Drawable drawable, @NonNull Bitmap.CompressFormat format) {
        return bitmap2Bytes(drawable2Bitmap(drawable), format);
    }

    /**
     * byteArr 转 drawable
     *
     * @param bytes 字节数组
     * @return drawable
     */
    public static Drawable bytes2Drawable(@NonNull Context context, @NonNull byte[] bytes) {
        return bitmap2Drawable(context, bytes2Bitmap(bytes));
    }

    /**
     * view 转 bitmap
     *
     * @param view 视图
     * @return bitmap
     */
    public static Bitmap view2Bitmap(@NonNull View view) {
        Bitmap ret = Bitmap.createBitmap(view.getWidth(),
                view.getHeight(),
                Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(ret);
        Drawable bgDrawable = view.getBackground();
        if (bgDrawable != null) {
            bgDrawable.draw(canvas);
        } else {
            canvas.drawColor(Color.WHITE);
        }
        view.draw(canvas);
        return ret;
    }

    /**
     * 获取 bitmap
     *
     * @param file 文件
     * @return bitmap
     */
    public static Bitmap getBitmap(@NonNull File file) {
        return BitmapFactory.decodeFile(file.getAbsolutePath());
    }

    /**
     * 获取 bitmap
     *
     * @param file      文件
     * @param maxWidth  最大宽度
     * @param maxHeight 最大高度
     * @return bitmap
     */
    public static Bitmap getBitmap(@NonNull File file, int maxWidth, int maxHeight) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(file.getAbsolutePath(), options);
        options.inSampleSize = calculateInSampleSize(options, maxWidth, maxHeight);
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
    }

    /**
     * 获取 bitmap
     *
     * @param filePath 文件路径
     * @return bitmap
     */
    public static Bitmap getBitmap(@NonNull String filePath) {
        return BitmapFactory.decodeFile(filePath);
    }

    /**
     * 获取 bitmap
     *
     * @param filePath  文件路径
     * @param maxWidth  最大宽度
     * @param maxHeight 最大高度
     * @return bitmap
     */
    public static Bitmap getBitmap(@NonNull String filePath, int maxWidth, int maxHeight) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(filePath, options);
        options.inSampleSize = calculateInSampleSize(options, maxWidth, maxHeight);
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeFile(filePath, options);
    }

    /**
     * 获取 bitmap
     *
     * @param data      数据
     * @param offset    偏移量
     * @param maxWidth  最大宽度
     * @param maxHeight 最大高度
     * @return bitmap
     */
    public static Bitmap getBitmap(byte[] data,
                                   int offset,
                                   int maxWidth,
                                   int maxHeight) {
        if (data.length == 0) return null;
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeByteArray(data, offset, data.length, options);
        options.inSampleSize = calculateInSampleSize(options, maxWidth, maxHeight);
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeByteArray(data, offset, data.length, options);
    }

    /**
     * 获取 bitmap
     *
     * @param resId 资源 id
     * @return bitmap
     */
    public static Bitmap getBitmap(@NonNull Context context, @DrawableRes final int resId) {
        Drawable drawable = ContextCompat.getDrawable(context, resId);
        Canvas canvas = new Canvas();
        Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),
                drawable.getIntrinsicHeight(),
                Bitmap.Config.ARGB_8888);
        canvas.setBitmap(bitmap);
        drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
        drawable.draw(canvas);
        return bitmap;
    }

    /**
     * 获取 bitmap
     *
     * @param resId     资源 id
     * @param maxWidth  最大宽度
     * @param maxHeight 最大高度
     * @return bitmap
     */
    public static Bitmap getBitmap(@NonNull Context context,
                                   @DrawableRes int resId,
                                   int maxWidth,
                                   int maxHeight) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        final Resources resources = context.getResources();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeResource(resources, resId, options);
        options.inSampleSize = calculateInSampleSize(options, maxWidth, maxHeight);
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeResource(resources, resId, options);
    }

    /**
     * 获取 bitmap
     *
     * @param fd 文件描述
     * @return bitmap
     */
    public static Bitmap getBitmap(final FileDescriptor fd) {
        if (fd == null) return null;
        return BitmapFactory.decodeFileDescriptor(fd);
    }

    /**
     * 获取 bitmap
     *
     * @param fd        文件描述
     * @param maxWidth  最大宽度
     * @param maxHeight 最大高度
     * @return bitmap
     */
    public static Bitmap getBitmap(@NonNull FileDescriptor fd,
                                   int maxWidth,
                                   int maxHeight) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFileDescriptor(fd, null, options);
        options.inSampleSize = calculateInSampleSize(options, maxWidth, maxHeight);
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeFileDescriptor(fd, null, options);
    }

    /**
     * 缩放图片
     *
     * @param src       源图片
     * @param newWidth  新宽度
     * @param newHeight 新高度
     * @param recycle   是否回收
     * @return 缩放后的图片
     */
    public static Bitmap scale(@NonNull Bitmap src,
                               int newWidth,
                               int newHeight,
                               boolean recycle) {
        Bitmap ret = Bitmap.createScaledBitmap(src, newWidth, newHeight, true);
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * 缩放图片
     *
     * @param src         源图片
     * @param scaleWidth  缩放宽度倍数
     * @param scaleHeight 缩放高度倍数
     * @param recycle     是否回收
     * @return 缩放后的图片
     */
    public static Bitmap scale(@NonNull Bitmap src,
                               float scaleWidth,
                               float scaleHeight,
                               boolean recycle) {
        Matrix matrix = new Matrix();
        matrix.setScale(scaleWidth, scaleHeight);
        Bitmap ret = Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), matrix, true);
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * 裁剪图片
     *
     * @param src     源图片
     * @param x       开始坐标 x
     * @param y       开始坐标 y
     * @param width   裁剪宽度
     * @param height  裁剪高度
     * @param recycle 是否回收
     * @return 裁剪后的图片
     */
    public static Bitmap clip(@NonNull Bitmap src,
                              int x,
                              int y,
                              int width,
                              int height,
                              boolean recycle) {
        Bitmap ret = Bitmap.createBitmap(src, x, y, width, height);
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * 倾斜图片
     *
     * @param src     源图片
     * @param kx      倾斜因子 x
     * @param ky      倾斜因子 y
     * @param px      平移因子 x
     * @param py      平移因子 y
     * @param recycle 是否回收
     * @return 倾斜后的图片
     */
    public static Bitmap skew(@NonNull Bitmap src,
                              float kx,
                              float ky,
                              float px,
                              float py,
                              boolean recycle) {
        Matrix matrix = new Matrix();
        matrix.setSkew(kx, ky, px, py);
        Bitmap ret = Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), matrix, true);
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * 旋转图片
     *
     * @param src     源图片
     * @param degrees 旋转角度
     * @param px      旋转点横坐标
     * @param py      旋转点纵坐标
     * @param recycle 是否回收
     * @return 旋转后的图片
     */
    public static Bitmap rotate(@NonNull Bitmap src,
                                int degrees,
                                float px,
                                float py,
                                boolean recycle) {

        if (degrees == 0) return src;
        Matrix matrix = new Matrix();
        matrix.setRotate(degrees, px, py);
        Bitmap ret = Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), matrix, true);
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * 获取图片旋转角度
     * <p>返回 -1 表示异常</p>
     *
     * @param filePath 文件路径
     * @return 旋转角度
     */
    public static int getRotateDegree(final String filePath) {
        try {
            ExifInterface exifInterface = new ExifInterface(filePath);
            int orientation = exifInterface.getAttributeInt(
                    ExifInterface.TAG_ORIENTATION,
                    ExifInterface.ORIENTATION_NORMAL
            );
            switch (orientation) {
                case ExifInterface.ORIENTATION_ROTATE_90:
                    return 90;
                case ExifInterface.ORIENTATION_ROTATE_180:
                    return 180;
                case ExifInterface.ORIENTATION_ROTATE_270:
                    return 270;
                default:
                    return 0;
            }
        } catch (IOException e) {
            e.printStackTrace();
            return -1;
        }
    }

    /**
     * 转为圆形图片
     *
     * @param src         源图片
     * @param recycle     是否回收
     * @param borderSize  边框尺寸
     * @param borderColor 边框颜色
     * @return 圆形图片
     */
    public static Bitmap toRound(@NonNull Bitmap src,
                                 @IntRange(from = 0) int borderSize,
                                 @ColorInt int borderColor,
                                 boolean recycle) {
        int width = src.getWidth();
        int height = src.getHeight();
        int size = Math.min(width, height);
        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        Bitmap ret = Bitmap.createBitmap(width, height, src.getConfig());
        float center = size / 2f;
        RectF rectF = new RectF(0, 0, width, height);
        rectF.inset((width - size) / 2f, (height - size) / 2f);
        Matrix matrix = new Matrix();
        matrix.setTranslate(rectF.left, rectF.top);
        matrix.preScale((float) size / width, (float) size / height);
        BitmapShader shader = new BitmapShader(src, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
        shader.setLocalMatrix(matrix);
        paint.setShader(shader);
        Canvas canvas = new Canvas(ret);
        canvas.drawRoundRect(rectF, center, center, paint);
        if (borderSize > 0) {
            paint.setShader(null);
            paint.setColor(borderColor);
            paint.setStyle(Paint.Style.STROKE);
            paint.setStrokeWidth(borderSize);
            float radius = center - borderSize / 2f;
            canvas.drawCircle(width / 2f, height / 2f, radius, paint);
        }
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * 转为圆角图片
     *
     * @param src         源图片
     * @param radius      圆角的度数
     * @param borderSize  边框尺寸
     * @param borderColor 边框颜色
     * @param recycle     是否回收
     * @return 圆角图片
     */
    public static Bitmap toRoundCorner(@NonNull Bitmap src,
                                       float radius,
                                       @IntRange(from = 0) int borderSize,
                                       @ColorInt int borderColor,
                                       boolean recycle) {
        int width = src.getWidth();
        int height = src.getHeight();
        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        Bitmap ret = Bitmap.createBitmap(width, height, src.getConfig());
        BitmapShader shader = new BitmapShader(src, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
        paint.setShader(shader);
        Canvas canvas = new Canvas(ret);
        RectF rectF = new RectF(0, 0, width, height);
        float halfBorderSize = borderSize / 2f;
        rectF.inset(halfBorderSize, halfBorderSize);
        canvas.drawRoundRect(rectF, radius, radius, paint);
        if (borderSize > 0) {
            paint.setShader(null);
            paint.setColor(borderColor);
            paint.setStyle(Paint.Style.STROKE);
            paint.setStrokeWidth(borderSize);
            paint.setStrokeCap(Paint.Cap.ROUND);
            canvas.drawRoundRect(rectF, radius, radius, paint);
        }
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * 添加边框
     *
     * @param src          源图片
     * @param borderSize   边框尺寸
     * @param color        边框颜色
     * @param isCircle     是否画圆
     * @param cornerRadius 圆角半径
     * @param recycle      是否回收
     * @return 边框图
     */
    private static Bitmap addBorder(@NonNull Bitmap src,
                                    @IntRange(from = 1) int borderSize,
                                    @ColorInt int color,
                                    boolean isCircle,
                                    float cornerRadius,
                                    boolean recycle) {

        Bitmap ret = recycle ? src : src.copy(src.getConfig(), true);
        int width = ret.getWidth();
        int height = ret.getHeight();
        Canvas canvas = new Canvas(ret);
        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        paint.setColor(color);
        paint.setStyle(Paint.Style.STROKE);
        paint.setStrokeWidth(borderSize);
        if (isCircle) {
            float radius = Math.min(width, height) / 2f - borderSize / 2f;
            canvas.drawCircle(width / 2f, height / 2f, radius, paint);
        } else {
            int halfBorderSize = borderSize >> 1;
            RectF rectF = new RectF(halfBorderSize, halfBorderSize,
                    width - halfBorderSize, height - halfBorderSize);
            canvas.drawRoundRect(rectF, cornerRadius, cornerRadius, paint);
        }
        return ret;
    }

    /**
     * 添加倒影
     *
     * @param src              源图片的
     * @param reflectionHeight 倒影高度
     * @param recycle          是否回收
     * @return 带倒影图片
     */
    public static Bitmap addReflection(@NonNull Bitmap src,
                                       int reflectionHeight,
                                       boolean recycle) {
        // 原图与倒影之间的间距
        final int REFLECTION_GAP = 0;
        int srcWidth = src.getWidth();
        int srcHeight = src.getHeight();
        Matrix matrix = new Matrix();
        matrix.preScale(1, -1);
        Bitmap reflectionBitmap = Bitmap.createBitmap(src, 0, srcHeight - reflectionHeight,
                srcWidth, reflectionHeight, matrix, false);
        Bitmap ret = Bitmap.createBitmap(srcWidth, srcHeight + reflectionHeight, src.getConfig());
        Canvas canvas = new Canvas(ret);
        canvas.drawBitmap(src, 0, 0, null);
        canvas.drawBitmap(reflectionBitmap, 0, srcHeight + REFLECTION_GAP, null);
        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        LinearGradient shader = new LinearGradient(
                0, srcHeight,
                0, ret.getHeight() + REFLECTION_GAP,
                0x70FFFFFF,
                0x00FFFFFF,
                Shader.TileMode.MIRROR);
        paint.setShader(shader);
        paint.setXfermode(new PorterDuffXfermode(android.graphics.PorterDuff.Mode.DST_IN));
        canvas.drawRect(0, srcHeight + REFLECTION_GAP, srcWidth, ret.getHeight(), paint);
        if (!reflectionBitmap.isRecycled()) reflectionBitmap.recycle();
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * 添加文字水印
     *
     * @param src      源图片
     * @param content  水印文本
     * @param textSize 水印字体大小
     * @param color    水印字体颜色
     * @param x        起始坐标 x
     * @param y        起始坐标 y
     * @param recycle  是否回收
     * @return 带有文字水印的图片
     */
    public static Bitmap addTextWatermark(@NonNull Bitmap src,
                                          @NonNull String content,
                                          float textSize,
                                          @ColorInt final int color,
                                          float x,
                                          float y,
                                          boolean recycle) {
        Bitmap ret = src.copy(src.getConfig(), true);
        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        Canvas canvas = new Canvas(ret);
        paint.setColor(color);
        paint.setTextSize(textSize);
        Rect bounds = new Rect();
        paint.getTextBounds(content, 0, content.length(), bounds);
        canvas.drawText(content, x, y + textSize, paint);
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * 添加图片水印
     *
     * @param src       源图片
     * @param watermark 图片水印
     * @param x         起始坐标 x
     * @param y         起始坐标 y
     * @param alpha     透明度
     * @param recycle   是否回收
     * @return 带有图片水印的图片
     */
    public static Bitmap addImageWatermark(@NonNull Bitmap src,
                                           @NonNull Bitmap watermark,
                                           int x,
                                           int y,
                                           int alpha,
                                           boolean recycle) {
        Bitmap ret = src.copy(src.getConfig(), true);
        if (!isEmptyBitmap(watermark)) {
            Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
            Canvas canvas = new Canvas(ret);
            paint.setAlpha(alpha);
            canvas.drawBitmap(watermark, x, y, paint);
        }
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * 转为 alpha 位图
     *
     * @param src     源图片
     * @param recycle 是否回收
     * @return alpha 位图
     */
    public static Bitmap toAlpha(@NonNull Bitmap src, Boolean recycle) {
        Bitmap ret = src.extractAlpha();
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * 转为灰度图片
     *
     * @param src     源图片
     * @param recycle 是否回收
     * @return 灰度图
     */
    public static Bitmap toGray(@NonNull Bitmap src, boolean recycle) {
        Bitmap ret = Bitmap.createBitmap(src.getWidth(), src.getHeight(), src.getConfig());
        Canvas canvas = new Canvas(ret);
        Paint paint = new Paint();
        ColorMatrix colorMatrix = new ColorMatrix();
        colorMatrix.setSaturation(0);
        ColorMatrixColorFilter colorMatrixColorFilter = new ColorMatrixColorFilter(colorMatrix);
        paint.setColorFilter(colorMatrixColorFilter);
        canvas.drawBitmap(src, 0, 0, paint);
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * 快速模糊图片
     * <p>先缩小原图，对小图进行模糊，再放大回原先尺寸</p>
     *
     * @param src     源图片
     * @param scale   缩放比例(0...1)
     * @param radius  模糊半径(0...25)
     * @param recycle 是否回收
     * @return 模糊后的图片
     */
    public static Bitmap fastBlur(@NonNull Context context,
                                  @NonNull Bitmap src,
                                  @FloatRange(from = 0, to = 1, fromInclusive = false) float scale,
                                  @FloatRange(from = 0, to = 25, fromInclusive = false) float radius,
                                  boolean recycle) {
        int width = src.getWidth();
        int height = src.getHeight();
        Matrix matrix = new Matrix();
        matrix.setScale(scale, scale);
        Bitmap scaleBitmap =
                Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), matrix, true);
        Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG | Paint.ANTI_ALIAS_FLAG);
        Canvas canvas = new Canvas();
        PorterDuffColorFilter filter = new PorterDuffColorFilter(
                Color.TRANSPARENT, PorterDuff.Mode.SRC_ATOP);
        paint.setColorFilter(filter);
        canvas.scale(scale, scale);
        canvas.drawBitmap(scaleBitmap, 0, 0, paint);
        scaleBitmap = renderScriptBlur(context, scaleBitmap, radius, recycle);

        if (scale == 1) {
            if (recycle && !src.isRecycled()) src.recycle();
            return scaleBitmap;
        }
        Bitmap ret = Bitmap.createScaledBitmap(scaleBitmap, width, height, true);
        if (!scaleBitmap.isRecycled()) scaleBitmap.recycle();
        if (recycle && !src.isRecycled()) src.recycle();
        return ret;
    }

    /**
     * renderScript 模糊图片
     * <p>API 大于 17</p>
     *
     * @param src     源图片
     * @param radius  模糊半径(0...25)
     * @param recycle 是否回收
     * @return 模糊后的图片
     */
    public static Bitmap renderScriptBlur(@NonNull Context context,
                                          @NonNull Bitmap src,
                                          @FloatRange(from = 0, to = 25, fromInclusive = false) float radius,
                                          boolean recycle) {

        RenderScript rs = null;
        Bitmap ret = recycle ? src : src.copy(src.getConfig(), true);
        try {
            rs = RenderScript.create(context);
            rs.setMessageHandler(new RenderScript.RSMessageHandler());
            Allocation input = Allocation.createFromBitmap(rs,
                    ret,
                    Allocation.MipmapControl.MIPMAP_NONE,
                    Allocation.USAGE_SCRIPT);
            Allocation output = Allocation.createTyped(rs, input.getType());
            ScriptIntrinsicBlur blurScript = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
            blurScript.setInput(input);
            blurScript.setRadius(radius);
            blurScript.forEach(output);
            output.copyTo(ret);
        } finally {
            if (rs != null) {
                rs.destroy();
            }
        }
        return ret;
    }

    /**
     * stack 模糊图片
     *
     * @param src     源图片
     * @param radius  模糊半径
     * @param recycle 是否回收
     * @return stack 模糊后的图片
     */
    public static Bitmap stackBlur(final Bitmap src, int radius, final boolean recycle) {
        Bitmap ret = recycle ? src : src.copy(src.getConfig(), true);
        if (radius < 1) {
            radius = 1;
        }
        int w = ret.getWidth();
        int h = ret.getHeight();

        int[] pix = new int[w * h];
        ret.getPixels(pix, 0, w, 0, 0, w, h);

        int wm = w - 1;
        int hm = h - 1;
        int wh = w * h;
        int div = radius + radius + 1;

        int r[] = new int[wh];
        int g[] = new int[wh];
        int b[] = new int[wh];
        int rsum, gsum, bsum, x, y, i, p, yp, yi, yw;
        int vmin[] = new int[Math.max(w, h)];

        int divsum = (div + 1) >> 1;
        divsum *= divsum;
        int dv[] = new int[256 * divsum];
        for (i = 0; i < 256 * divsum; i++) {
            dv[i] = (i / divsum);
        }

        yw = yi = 0;

        int[][] stack = new int[div][3];
        int stackpointer;
        int stackstart;
        int[] sir;
        int rbs;
        int r1 = radius + 1;
        int routsum, goutsum, boutsum;
        int rinsum, ginsum, binsum;

        for (y = 0; y < h; y++) {
            rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
            for (i = -radius; i <= radius; i++) {
                p = pix[yi + Math.min(wm, Math.max(i, 0))];
                sir = stack[i + radius];
                sir[0] = (p & 0xff0000) >> 16;
                sir[1] = (p & 0x00ff00) >> 8;
                sir[2] = (p & 0x0000ff);
                rbs = r1 - Math.abs(i);
                rsum += sir[0] * rbs;
                gsum += sir[1] * rbs;
                bsum += sir[2] * rbs;
                if (i > 0) {
                    rinsum += sir[0];
                    ginsum += sir[1];
                    binsum += sir[2];
                } else {
                    routsum += sir[0];
                    goutsum += sir[1];
                    boutsum += sir[2];
                }
            }
            stackpointer = radius;

            for (x = 0; x < w; x++) {

                r[yi] = dv[rsum];
                g[yi] = dv[gsum];
                b[yi] = dv[bsum];

                rsum -= routsum;
                gsum -= goutsum;
                bsum -= boutsum;

                stackstart = stackpointer - radius + div;
                sir = stack[stackstart % div];

                routsum -= sir[0];
                goutsum -= sir[1];
                boutsum -= sir[2];

                if (y == 0) {
                    vmin[x] = Math.min(x + radius + 1, wm);
                }
                p = pix[yw + vmin[x]];

                sir[0] = (p & 0xff0000) >> 16;
                sir[1] = (p & 0x00ff00) >> 8;
                sir[2] = (p & 0x0000ff);

                rinsum += sir[0];
                ginsum += sir[1];
                binsum += sir[2];

                rsum += rinsum;
                gsum += ginsum;
                bsum += binsum;

                stackpointer = (stackpointer + 1) % div;
                sir = stack[(stackpointer) % div];

                routsum += sir[0];
                goutsum += sir[1];
                boutsum += sir[2];

                rinsum -= sir[0];
                ginsum -= sir[1];
                binsum -= sir[2];

                yi++;
            }
            yw += w;
        }
        for (x = 0; x < w; x++) {
            rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
            yp = -radius * w;
            for (i = -radius; i <= radius; i++) {
                yi = Math.max(0, yp) + x;

                sir = stack[i + radius];

                sir[0] = r[yi];
                sir[1] = g[yi];
                sir[2] = b[yi];

                rbs = r1 - Math.abs(i);

                rsum += r[yi] * rbs;
                gsum += g[yi] * rbs;
                bsum += b[yi] * rbs;

                if (i > 0) {
                    rinsum += sir[0];
                    ginsum += sir[1];
                    binsum += sir[2];
                } else {
                    routsum += sir[0];
                    goutsum += sir[1];
                    boutsum += sir[2];
                }

                if (i < hm) {
                    yp += w;
                }
            }
            yi = x;
            stackpointer = radius;
            for (y = 0; y < h; y++) {
                // Preserve alpha channel: ( 0xff000000 & pix[yi] )
                pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum];

                rsum -= routsum;
                gsum -= goutsum;
                bsum -= boutsum;

                stackstart = stackpointer - radius + div;
                sir = stack[stackstart % div];

                routsum -= sir[0];
                goutsum -= sir[1];
                boutsum -= sir[2];

                if (x == 0) {
                    vmin[y] = Math.min(y + r1, hm) * w;
                }
                p = x + vmin[y];

                sir[0] = r[p];
                sir[1] = g[p];
                sir[2] = b[p];

                rinsum += sir[0];
                ginsum += sir[1];
                binsum += sir[2];

                rsum += rinsum;
                gsum += ginsum;
                bsum += binsum;

                stackpointer = (stackpointer + 1) % div;
                sir = stack[stackpointer];

                routsum += sir[0];
                goutsum += sir[1];
                boutsum += sir[2];

                rinsum -= sir[0];
                ginsum -= sir[1];
                binsum -= sir[2];

                yi += w;
            }
        }
        ret.setPixels(pix, 0, w, 0, 0, w, h);
        return ret;
    }

    /**
     * 保存图片
     *
     * @param src     源图片
     * @param file    要保存到的文件
     * @param format  格式
     * @param recycle 是否回收
     * @return {@code true}: 成功<br>{@code false}: 失败
     */
    public static boolean save(@NonNull Bitmap src,
                               @NonNull File file,
                               Bitmap.CompressFormat format,
                               boolean recycle) {
        OutputStream os = null;
        boolean ret = false;
        try {
            os = new BufferedOutputStream(new FileOutputStream(file));
            ret = src.compress(format, 100, os);
            if (recycle && !src.isRecycled()) src.recycle();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            closeIO(os);
        }
        return ret;
    }

    /**
     * 根据文件名判断文件是否为图片
     *
     * @param filePath 　文件路径
     * @return {@code true}: 是<br>{@code false}: 否
     */
    public static boolean isImage(final String filePath) {
        String path = filePath.toUpperCase();
        return path.endsWith(".PNG") || path.endsWith(".JPG")
                || path.endsWith(".JPEG") || path.endsWith(".BMP")
                || path.endsWith(".GIF");
    }

    /**
     * 获取图片类型
     *
     * @param file 文件
     * @return 图片类型
     */
    public static String getImageType(@NonNull File file) {
        InputStream is = null;
        try {
            is = new FileInputStream(file);
            return getImageType(is);
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        } finally {
            closeIO(is);
        }
    }

    /**
     * 流获取图片类型
     *
     * @param is 图片输入流
     * @return 图片类型
     */
    public static String getImageType(@NonNull InputStream is) {
        try {
            byte[] bytes = new byte[8];
            return is.read(bytes, 0, 8) != -1 ? getImageType(bytes) : null;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 获取图片类型
     *
     * @param bytes bitmap 的前 8 字节
     * @return 图片类型
     */
    public static String getImageType(final byte[] bytes) {
        if (isJPEG(bytes)) return "JPEG";
        if (isGIF(bytes)) return "GIF";
        if (isPNG(bytes)) return "PNG";
        if (isBMP(bytes)) return "BMP";
        return null;
    }

    private static boolean isJPEG(final byte[] b) {
        return b.length >= 2
                && (b[0] == (byte) 0xFF) && (b[1] == (byte) 0xD8);
    }

    private static boolean isGIF(final byte[] b) {
        return b.length >= 6
                && b[0] == 'G' && b[1] == 'I'
                && b[2] == 'F' && b[3] == '8'
                && (b[4] == '7' || b[4] == '9') && b[5] == 'a';
    }

    private static boolean isPNG(final byte[] b) {
        return b.length >= 8
                && (b[0] == (byte) 137 && b[1] == (byte) 80
                && b[2] == (byte) 78 && b[3] == (byte) 71
                && b[4] == (byte) 13 && b[5] == (byte) 10
                && b[6] == (byte) 26 && b[7] == (byte) 10);
    }

    private static boolean isBMP(final byte[] b) {
        return b.length >= 2
                && (b[0] == 0x42) && (b[1] == 0x4d);
    }

    /**
     * 判断 bitmap 对象是否为空
     *
     * @param src 源图片
     * @return {@code true}: 是<br>{@code false}: 否
     */
    private static boolean isEmptyBitmap(final Bitmap src) {
        return src == null || src.getWidth() == 0 || src.getHeight() == 0;
    }

    ///////////////////////////////////////////////////////////////////////////
    // 下方和压缩有关
    ///////////////////////////////////////////////////////////////////////////

    /**
     * 按质量压缩
     *
     * @param src     源图片
     * @param quality 质量
     * @param recycle 是否回收
     * @return 质量压缩后的图片
     */
    public static Bitmap compressByQuality(final Bitmap src,
                                           @IntRange(from = 0, to = 100) final int quality,
                                           final boolean recycle) {
        if (isEmptyBitmap(src)) return null;
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        src.compress(Bitmap.CompressFormat.JPEG, quality, baos);
        byte[] bytes = baos.toByteArray();
        if (recycle && !src.isRecycled()) src.recycle();
        return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
    }

    /**
     * 按质量压缩
     *
     * @param src         源图片
     * @param maxByteSize 允许最大值字节数
     * @param recycle     是否回收
     * @return 质量压缩压缩过的图片
     */
    public static Bitmap compressByQuality(Bitmap src,
                                           long maxByteSize,
                                           boolean recycle) {
        if (maxByteSize <= 0) return null;
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        src.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        byte[] bytes;
        if (baos.size() <= maxByteSize) {// 最好质量的不大于最大字节，则返回最佳质量
            bytes = baos.toByteArray();
        } else {
            baos.reset();
            src.compress(Bitmap.CompressFormat.JPEG, 0, baos);
            if (baos.size() >= maxByteSize) { // 最差质量不小于最大字节，则返回最差质量
                bytes = baos.toByteArray();
            } else {
                // 二分法寻找最佳质量
                int st = 0;
                int end = 100;
                int mid = 0;
                while (st < end) {
                    mid = (st + end) / 2;
                    baos.reset();
                    src.compress(Bitmap.CompressFormat.JPEG, mid, baos);
                    int len = baos.size();
                    if (len == maxByteSize) {
                        break;
                    } else if (len > maxByteSize) {
                        end = mid - 1;
                    } else {
                        st = mid + 1;
                    }
                }
                if (end == mid - 1) {
                    baos.reset();
                    src.compress(Bitmap.CompressFormat.JPEG, st, baos);
                }
                bytes = baos.toByteArray();
            }
        }
        if (recycle && !src.isRecycled()) src.recycle();
        return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
    }

    /**
     * 按采样大小压缩
     *
     * @param src        源图片
     * @param sampleSize 采样率大小
     * @param recycle    是否回收
     * @return 按采样率压缩后的图片
     */
    public static Bitmap compressBySampleSize(final Bitmap src,
                                              final int sampleSize,
                                              final boolean recycle) {
        if (isEmptyBitmap(src)) return null;
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inSampleSize = sampleSize;
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        src.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        byte[] bytes = baos.toByteArray();
        if (recycle && !src.isRecycled()) src.recycle();
        return BitmapFactory.decodeByteArray(bytes, 0, bytes.length, options);
    }

    /**
     * 按采样大小压缩
     *
     * @param src       源图片
     * @param maxWidth  最大宽度
     * @param maxHeight 最大高度
     * @param recycle   是否回收
     * @return 按采样率压缩后的图片
     */
    public static Bitmap compressBySampleSize(@NonNull Bitmap src,
                                              int maxWidth,
                                              int maxHeight,
                                              boolean recycle) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        src.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        byte[] bytes = baos.toByteArray();
        BitmapFactory.decodeByteArray(bytes, 0, bytes.length, options);
        options.inSampleSize = calculateInSampleSize(options, maxWidth, maxHeight);
        options.inJustDecodeBounds = false;
        if (recycle && !src.isRecycled()) src.recycle();
        return BitmapFactory.decodeByteArray(bytes, 0, bytes.length, options);
    }

    private static boolean createOrExistsDir(final File file) {
        return file != null && (file.exists() ? file.isDirectory() : file.mkdirs());
    }

    private static boolean isSpace(@NonNull String s) {
        for (int i = 0, len = s.length(); i < len; ++i) {
            if (!Character.isWhitespace(s.charAt(i))) {
                return false;
            }
        }
        return true;
    }

    /**
     * 计算采样大小
     *
     * @param options   选项
     * @param maxWidth  最大宽度
     * @param maxHeight 最大高度
     * @return 采样大小
     */
    private static int calculateInSampleSize(BitmapFactory.Options options,
                                             int maxWidth,
                                             int maxHeight) {
        int height = options.outHeight;
        int width = options.outWidth;
        int inSampleSize = 1;
        while ((width >>= 1) >= maxWidth && (height >>= 1) >= maxHeight) {
            inSampleSize <<= 1;
        }
        return inSampleSize;
    }

    private static byte[] input2Byte(@NonNull InputStream is) {
        try {
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            byte[] b = new byte[1024];
            int len;
            while ((len = is.read(b, 0, 1024)) != -1) {
                os.write(b, 0, len);
            }
            return os.toByteArray();
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        } finally {
            closeIO(is);
        }
    }

    /**
     * 关闭 IO
     *
     * @param closeables closeables
     */
    public static void closeIO(Closeable... closeables) {
        if (closeables == null) return;
        for (Closeable closeable : closeables) {
            if (closeable != null) {
                try {
                    closeable.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

}