ImageUtils-圖片相關工具類
bitmap2Bytes, bytes2Bitmap : bitmap與byteArr互轉
drawable2Bitmap, bitmap2Drawable : drawable與bitmap互轉
drawable2Bytes, bytes2Drawable : drawable與byteArr互轉
getBitmap : 獲取bitmap
scale : 縮放圖片
clip : 裁剪圖片
skew : 傾斜圖片
rotate : 旋轉圖片
getRotateDegree : 獲取圖片旋轉角度
toRound : 轉為圓形圖片
toRoundCorner : 轉為圓角圖片
fastBlur : 快速模糊
renderScriptBlur : renderScript模糊圖片
stackBlur : stack模糊圖片
addFrame : 新增顏色邊框
addReflection : 新增倒影
addTextWatermark : 新增文字水印
addImageWatermark : 新增圖片水印
toAlpha : 轉為alpha點陣圖
toGray : 轉為灰度圖片
save : 儲存圖片
isImage : 根據檔名判斷檔案是否為圖片
getImageType : 獲取圖片型別
compressByScale : 按縮放壓縮
compressByQuality : 按質量壓縮
compressBySampleSize : 按取樣大小壓縮
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
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.graphics.drawable.NinePatchDrawable;
import android.media.ExifInterface;
import android.os.Build;
import android.renderscript.Allocation;
import android.renderscript.Element;
import android.renderscript.RenderScript;
import android.renderscript.ScriptIntrinsicBlur;
import android.support.annotation.FloatRange;
import android.support.annotation.IntRange;
import android.view.View;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* <pre>
* author: Blankj
* blog : http://blankj.com
* time : 2016/8/12
* desc : 圖片相關工具類
* </pre>
*/
public class ImageUtils {
private ImageUtils() {
throw new UnsupportedOperationException("u can't instantiate me...");
}
/**
* bitmap轉byteArr
*
* @param bitmap bitmap物件
* @param format 格式
* @return 位元組陣列
*/
public static byte[] bitmap2Bytes(Bitmap bitmap, CompressFormat format) {
if (bitmap == null) return null;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(format, 100, baos);
return baos.toByteArray();
}
/**
* byteArr轉bitmap
*
* @param bytes 位元組陣列
* @return bitmap
*/
public static Bitmap bytes2Bitmap(byte[] bytes) {
return (bytes == null || bytes.length == 0) ? null : BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
}
/**
* drawable轉bitmap
*
* @param drawable drawable物件
* @return bitmap
*/
public static Bitmap drawable2Bitmap(Drawable drawable) {
if (drawable instanceof BitmapDrawable) {
return ((BitmapDrawable) drawable).getBitmap();
} else if (drawable instanceof NinePatchDrawable) {
Bitmap 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, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
drawable.draw(canvas);
return bitmap;
} else {
return null;
}
}
/**
* bitmap轉drawable
*
* @param res resources物件
* @param bitmap bitmap物件
* @return drawable
*/
public static Drawable bitmap2Drawable(Resources res, Bitmap bitmap) {
return bitmap == null ? null : new BitmapDrawable(res, bitmap);
}
/**
* drawable轉byteArr
*
* @param drawable drawable物件
* @param format 格式
* @return 位元組陣列
*/
public static byte[] drawable2Bytes(Drawable drawable, CompressFormat format) {
return drawable == null ? null : bitmap2Bytes(drawable2Bitmap(drawable), format);
}
/**
* byteArr轉drawable
*
* @param res resources物件
* @param bytes 位元組陣列
* @return drawable
*/
public static Drawable bytes2Drawable(Resources res, byte[] bytes) {
return res == null ? null : bitmap2Drawable(res, bytes2Bitmap(bytes));
}
/**
* view轉Bitmap
*
* @param view 檢視
* @return bitmap
*/
public static Bitmap view2Bitmap(View view) {
if (view == null) return null;
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;
}
/**
* 計算取樣大小
*
* @param options 選項
* @param maxWidth 最大寬度
* @param maxHeight 最大高度
* @return 取樣大小
*/
private static int calculateInSampleSize(BitmapFactory.Options options, int maxWidth, int maxHeight) {
if (maxWidth == 0 || maxHeight == 0) return 1;
int height = options.outHeight;
int width = options.outWidth;
int inSampleSize = 1;
while ((height >>= 1) >= maxHeight && (width >>= 1) >= maxWidth) {
inSampleSize <<= 1;
}
return inSampleSize;
}
/**
* 獲取bitmap
*
* @param file 檔案
* @return bitmap
*/
public static Bitmap getBitmap(File file) {
if (file == null) return null;
InputStream is = null;
try {
is = new BufferedInputStream(new FileInputStream(file));
return BitmapFactory.decodeStream(is);
} catch (FileNotFoundException e) {
e.printStackTrace();
return null;
} finally {
CloseUtils.closeIO(is);
}
}
/**
* 獲取bitmap
*
* @param file 檔案
* @param maxWidth 最大寬度
* @param maxHeight 最大高度
* @return bitmap
*/
public static Bitmap getBitmap(File file, int maxWidth, int maxHeight) {
if (file == null) return null;
InputStream is = null;
try {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
is = new BufferedInputStream(new FileInputStream(file));
BitmapFactory.decodeStream(is, null, options);
options.inSampleSize = calculateInSampleSize(options, maxWidth, maxHeight);
options.inJustDecodeBounds = false;
return BitmapFactory.decodeStream(is, null, options);
} catch (FileNotFoundException e) {
e.printStackTrace();
return null;
} finally {
CloseUtils.closeIO(is);
}
}
/**
* 獲取bitmap
*
* @param filePath 檔案路徑
* @return bitmap
*/
public static Bitmap getBitmap(String filePath) {
if (StringUtils.isSpace(filePath)) return null;
return BitmapFactory.decodeFile(filePath);
}
/**
* 獲取bitmap
*
* @param filePath 檔案路徑
* @param maxWidth 最大寬度
* @param maxHeight 最大高度
* @return bitmap
*/
public static Bitmap getBitmap(String filePath, int maxWidth, int maxHeight) {
if (StringUtils.isSpace(filePath)) return null;
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);
}
/**
* 獲取bitmap
*
* @param is 輸入流
* @return bitmap
*/
public static Bitmap getBitmap(InputStream is) {
if (is == null) return null;
return BitmapFactory.decodeStream(is);
}
/**
* 獲取bitmap
*
* @param is 輸入流
* @param maxWidth 最大寬度
* @param maxHeight 最大高度
* @return bitmap
*/
public static Bitmap getBitmap(InputStream is, int maxWidth, int maxHeight) {
if (is == null) return null;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(is, null, options);
options.inSampleSize = calculateInSampleSize(options, maxWidth, maxHeight);
options.inJustDecodeBounds = false;
return BitmapFactory.decodeStream(is, null, options);
}
/**
* 獲取bitmap
*
* @param data 資料
* @param offset 偏移量
* @return bitmap
*/
public static Bitmap getBitmap(byte[] data, int offset) {
if (data.length == 0) return null;
return BitmapFactory.decodeByteArray(data, offset, data.length);
}
/**
* 獲取bitmap
*
* @param data 資料
* @param offset 偏移量
* @param maxWidth 最大寬度
* @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);
}
/**
* 獲取bitmap
*
* @param res 資源物件
* @param id 資源id
* @return bitmap
*/
public static Bitmap getBitmap(Resources res, int id) {
if (res == null) return null;
return BitmapFactory.decodeResource(res, id);
}
/**
* 獲取bitmap
*
* @param res 資源物件
* @param id 資源id
* @param maxWidth 最大寬度
* @param maxHeight 最大高度
* @return bitmap
*/
public static Bitmap getBitmap(Resources res, int id, int maxWidth, int maxHeight) {
if (res == null) return null;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(res, id, options);
options.inSampleSize = calculateInSampleSize(options, maxWidth, maxHeight);
options.inJustDecodeBounds = false;
return BitmapFactory.decodeResource(res, id, options);
}
/**
* 獲取bitmap
*
* @param fd 檔案描述
* @return bitmap
*/
public static Bitmap getBitmap(FileDescriptor fd) {
if (fd == null) return null;
return BitmapFactory.decodeFileDescriptor(fd);
}
/**
* 獲取bitmap
*
* @param fd 檔案描述
* @param maxWidth 最大寬度
* @param maxHeight 最大高度
* @return bitmap
*/
public static Bitmap getBitmap(FileDescriptor fd, int maxWidth, int maxHeight) {
if (fd == null) return null;
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);
}
/**
* 縮放圖片
*
* @param src 源圖片
* @param newWidth 新寬度
* @param newHeight 新高度
* @return 縮放後的圖片
*/
public static Bitmap scale(Bitmap src, int newWidth, int newHeight) {
return scale(src, newWidth, newHeight, false);
}
/**
* 縮放圖片
*
* @param src 源圖片
* @param newWidth 新寬度
* @param newHeight 新高度
* @param recycle 是否回收
* @return 縮放後的圖片
*/
public static Bitmap scale(Bitmap src, int newWidth, int newHeight, boolean recycle) {
if (isEmptyBitmap(src)) return null;
Bitmap ret = Bitmap.createScaledBitmap(src, newWidth, newHeight, true);
if (recycle && !src.isRecycled()) src.recycle();
return ret;
}
/**
* 縮放圖片
*
* @param src 源圖片
* @param scaleWidth 縮放寬度倍數
* @param scaleHeight 縮放高度倍數
* @return 縮放後的圖片
*/
public static Bitmap scale(Bitmap src, float scaleWidth, float scaleHeight) {
return scale(src, scaleWidth, scaleHeight, false);
}
/**
* 縮放圖片
*
* @param src 源圖片
* @param scaleWidth 縮放寬度倍數
* @param scaleHeight 縮放高度倍數
* @param recycle 是否回收
* @return 縮放後的圖片
*/
public static Bitmap scale(Bitmap src, float scaleWidth, float scaleHeight, boolean recycle) {
if (isEmptyBitmap(src)) return null;
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;
}
/**
* 裁剪圖片
*
* @param src 源圖片
* @param x 開始座標x
* @param y 開始座標y
* @param width 裁剪寬度
* @param height 裁剪高度
* @return 裁剪後的圖片
*/
public static Bitmap clip(Bitmap src, int x, int y, int width, int height) {
return clip(src, x, y, width, height, false);
}
/**
* 裁剪圖片
*
* @param src 源圖片
* @param x 開始座標x
* @param y 開始座標y
* @param width 裁剪寬度
* @param height 裁剪高度
* @param recycle 是否回收
* @return 裁剪後的圖片
*/
public static Bitmap clip(Bitmap src, int x, int y, int width, int height, boolean recycle) {
if (isEmptyBitmap(src)) return null;
Bitmap ret = Bitmap.createBitmap(src, x, y, width, height);
if (recycle && !src.isRecycled()) src.recycle();
return ret;
}
/**
* 傾斜圖片
*
* @param src 源圖片
* @param kx 傾斜因子x
* @param ky 傾斜因子y
* @return 傾斜後的圖片
*/
public static Bitmap skew(Bitmap src, float kx, float ky) {
return skew(src, kx, ky, 0, 0, false);
}
/**
* 傾斜圖片
*
* @param src 源圖片
* @param kx 傾斜因子x
* @param ky 傾斜因子y
* @param recycle 是否回收
* @return 傾斜後的圖片
*/
public static Bitmap skew(Bitmap src, float kx, float ky, boolean recycle) {
return skew(src, kx, ky, 0, 0, recycle);
}
/**
* 傾斜圖片
*
* @param src 源圖片
* @param kx 傾斜因子x
* @param ky 傾斜因子y
* @param px 平移因子x
* @param py 平移因子y
* @return 傾斜後的圖片
*/
public static Bitmap skew(Bitmap src, float kx, float ky, float px, float py) {
return skew(src, kx, ky, px, py, false);
}
/**
* 傾斜圖片
*
* @param src 源圖片
* @param kx 傾斜因子x
* @param ky 傾斜因子y
* @param px 平移因子x
* @param py 平移因子y
* @param recycle 是否回收
* @return 傾斜後的圖片
*/
public static Bitmap skew(Bitmap src, float kx, float ky, float px, float py, boolean recycle) {
if (isEmptyBitmap(src)) return null;
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;
}
/**
* 旋轉圖片
*
* @param src 源圖片
* @param degrees 旋轉角度
* @param px 旋轉點橫座標
* @param py 旋轉點縱座標
* @return 旋轉後的圖片
*/
public static Bitmap rotate(Bitmap src, int degrees, float px, float py) {
return rotate(src, degrees, px, py, false);
}
/**
* 旋轉圖片
*
* @param src 源圖片
* @param degrees 旋轉角度
* @param px 旋轉點橫座標
* @param py 旋轉點縱座標
* @param recycle 是否回收
* @return 旋轉後的圖片
*/
public static Bitmap rotate(Bitmap src, int degrees, float px, float py, boolean recycle) {
if (isEmptyBitmap(src)) return null;
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;
}
/**
* 獲取圖片旋轉角度
*
* @param filePath 檔案路徑
* @return 旋轉角度
*/
public static int getRotateDegree(String filePath) {
int degree = 0;
try {
ExifInterface exifInterface = new ExifInterface(filePath);
int orientation = exifInterface.getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
default:
case ExifInterface.ORIENTATION_ROTATE_90:
degree = 90;
break;
case ExifInterface.ORIENTATION_ROTATE_180:
degree = 180;
break;
case ExifInterface.ORIENTATION_ROTATE_270:
degree = 270;
break;
}
} catch (IOException e) {
e.printStackTrace();
}
return degree;
}
/**
* 轉為圓形圖片
*
* @param src 源圖片
* @return 圓形圖片
*/
public static Bitmap toRound(Bitmap src) {
return toRound(src, false);
}
/**
* 轉為圓形圖片
*
* @param src 源圖片
* @param recycle 是否回收
* @return 圓形圖片
*/
public static Bitmap toRound(Bitmap src, boolean recycle) {
if (isEmptyBitmap(src)) return null;
int width = src.getWidth();
int height = src.getHeight();
int radius = Math.min(width, height) >> 1;
Bitmap ret = Bitmap.createBitmap(width, height, src.getConfig());
Paint paint = new Paint();
Canvas canvas = new Canvas(ret);
Rect rect = new Rect(0, 0, width, height);
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
canvas.drawCircle(width >> 1, height >> 1, radius, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(src, rect, rect, paint);
if (recycle && !src.isRecycled()) src.recycle();
return ret;
}
/**
* 轉為圓角圖片
*
* @param src 源圖片
* @param radius 圓角的度數
* @return 圓角圖片
*/
public static Bitmap toRoundCorner(Bitmap src, float radius) {
return toRoundCorner(src, radius, false);
}
/**
* 轉為圓角圖片
*
* @param src 源圖片
* @param radius 圓角的度數
* @param recycle 是否回收
* @return 圓角圖片
*/
public static Bitmap toRoundCorner(Bitmap src, float radius, boolean recycle) {
if (null == src) return null;
int width = src.getWidth();
int height = src.getHeight();
Bitmap ret = Bitmap.createBitmap(width, height, src.getConfig());
Paint paint = new Paint();
Canvas canvas = new Canvas(ret);
Rect rect = new Rect(0, 0, width, height);
paint.setAntiAlias(true);
canvas.drawRoundRect(new RectF(rect), radius, radius, paint);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
canvas.drawBitmap(src, rect, rect, paint);
if (recycle && !src.isRecycled()) src.recycle();
return ret;
}
/**
* 快速模糊
* <p>先縮小原圖，對小圖進行模糊，再放大回原先尺寸</p>
*
* @param src 源圖片
* @param scale 縮放比例(0...1)
* @param radius 模糊半徑
* @return 模糊後的圖片
*/
public static Bitmap fastBlur(Bitmap src,
@FloatRange(from = 0, to = 1, fromInclusive = false) float scale,
@FloatRange(from = 0, to = 25, fromInclusive = false) float radius) {
return fastBlur(src, scale, radius, false);
}
/**
* 快速模糊圖片
* <p>先縮小原圖，對小圖進行模糊，再放大回原先尺寸</p>
*
* @param src 源圖片
* @param scale 縮放比例(0...1)
* @param radius 模糊半徑(0...25)
* @param recycle 是否回收
* @return 模糊後的圖片
*/
public static Bitmap fastBlur(Bitmap src,
@FloatRange(from = 0, to = 1, fromInclusive = false) float scale,
@FloatRange(from = 0, to = 25, fromInclusive = false) float radius,
boolean recycle) {
if (isEmptyBitmap(src)) return null;
int width = src.getWidth();
int height = src.getHeight();
int scaleWidth = (int) (width * scale + 0.5f);
int scaleHeight = (int) (height * scale + 0.5f);
if (scaleWidth == 0 || scaleHeight == 0) return null;
Bitmap scaleBitmap = Bitmap.createScaledBitmap(src, scaleWidth, scaleHeight, 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);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
scaleBitmap = renderScriptBlur(Utils.getContext(), scaleBitmap, radius);
} else {
scaleBitmap = stackBlur(scaleBitmap, (int) radius, recycle);
}
if (scale == 1) return scaleBitmap;
Bitmap ret = Bitmap.createScaledBitmap(scaleBitmap, width, height, true);
if (scaleBitmap != null && !scaleBitmap.isRecycled()) scaleBitmap.recycle();
if (recycle && !src.isRecycled()) src.recycle();
return ret;
}
/**
* renderScript模糊圖片
* <p>API大於17</p>
*
* @param context 上下文
* @param src 源圖片
* @param radius 模糊半徑(0...25)
* @return 模糊後的圖片
*/
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
public static Bitmap renderScriptBlur(Context context, Bitmap src, @FloatRange(from = 0, to = 25, fromInclusive = false) float radius) {
if (isEmptyBitmap(src)) return null;
RenderScript rs = null;
try {
rs = RenderScript.create(context);
rs.setMessageHandler(new RenderScript.RSMessageHandler());
Allocation input = Allocation.createFromBitmap(rs, src, 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(src);
} finally {
if (rs != null) {
rs.destroy();
}
}
return src;
}
/**
* stack模糊圖片
*
* @param src 源圖片
* @param radius 模糊半徑
* @param recycle 是否回收
* @return stack模糊後的圖片
*/
public static Bitmap stackBlur(Bitmap src, int radius, boolean recycle) {
Bitmap ret;
if (recycle) {
ret = src;
} else {
ret = src.copy(src.getConfig(), true);
}
if (radius < 1) {
return null;
}
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;
}
/**
* 新增顏色邊框
*
* @param src 源圖片
* @param borderWidth 邊框寬度
* @param color 邊框的顏色值
* @return 帶顏色邊框圖
*/
public static Bitmap addFrame(Bitmap src, int borderWidth, int color) {
return addFrame(src, borderWidth, color, false);
}
/**
* 新增顏色邊框
*
* @param src 源圖片
* @param borderWidth 邊框寬度
* @param color 邊框的顏色值
* @param recycle 是否回收
* @return 帶顏色邊框圖
*/
public static Bitmap addFrame(Bitmap src, int borderWidth, int color, boolean recycle) {
if (isEmptyBitmap(src)) return null;
int doubleBorder = borderWidth << 1;
int newWidth = src.getWidth() + doubleBorder;
int newHeight = src.getHeight() + doubleBorder;
Bitmap ret = Bitmap.createBitmap(newWidth, newHeight, src.getConfig());
Canvas canvas = new Canvas(ret);
Rect rect = new Rect(0, 0, newWidth, newHeight);
Paint paint = new Paint();
paint.setColor(color);
paint.setStyle(Paint.Style.STROKE);
// setStrokeWidth是居中畫的，所以要兩倍的寬度才能畫，否則有一半的寬度是空的
paint.setStrokeWidth(doubleBorder);
canvas.drawRect(rect, paint);
canvas.drawBitmap(src, borderWidth, borderWidth, null);
if (recycle && !src.isRecycled()) src.recycle();
return ret;
}
/**
* 新增倒影
*
* @param src 源圖片的
* @param reflectionHeight 倒影高度
* @return 帶倒影圖片
*/
public static Bitmap addReflection(Bitmap src, int reflectionHeight) {
return addReflection(src, reflectionHeight, false);
}
/**
* 新增倒影
*
* @param src 源圖片的
* @param reflectionHeight 倒影高度
* @param recycle 是否回收
* @return 帶倒影圖片
*/
public static Bitmap addReflection(Bitmap src, int reflectionHeight, boolean recycle) {
if (isEmptyBitmap(src)) return null;
// 原圖與倒影之間的間距
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.setAntiAlias(true);
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;
}
/**
* 新增文字水印
*
* @param src 源圖片
* @param content 水印文字
* @param textSize 水印字型大小
* @param color 水印字型顏色
* @param x 起始座標x
* @param y 起始座標y
* @return 帶有文字水印的圖片
*/
public static Bitmap addTextWatermark(Bitmap src, String content, int textSize, int color, float x,
float y) {
return addTextWatermark(src, content, textSize, color, x, y, false);
}
/**
* 新增文字水印
*
* @param src 源圖片
* @param content 水印文字
* @param textSize 水印字型大小
* @param color 水印字型顏色
* @param x 起始座標x
* @param y 起始座標y
* @param recycle 是否回收
* @return 帶有文字水印的圖片
*/
public static Bitmap addTextWatermark(Bitmap src, String content, float textSize, int color, float x,
float y, boolean recycle) {
if (isEmptyBitmap(src) || content == null) return null;
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;
}
/**
* 新增圖片水印
*
* @param src 源圖片
* @param watermark 圖片水印
* @param x 起始座標x
* @param y 起始座標y
* @param alpha 透明度
* @return 帶有圖片水印的圖片
*/
public static Bitmap addImageWatermark(Bitmap src, Bitmap watermark, int x, int y, int alpha) {
return addImageWatermark(src, watermark, x, y, alpha, false);
}
/**
* 新增圖片水印
*
* @param src 源圖片
* @param watermark 圖片水印
* @param x 起始座標x
* @param y 起始座標y
* @param alpha 透明度
* @param recycle 是否回收
* @return 帶有圖片水印的圖片
*/
public static Bitmap addImageWatermark(Bitmap src, Bitmap watermark, int x, int y, int alpha, boolean recycle) {
if (isEmptyBitmap(src)) return null;
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;
}
/**
* 轉為alpha點陣圖
*
* @param src 源圖片
* @return alpha點陣圖
*/
public static Bitmap toAlpha(Bitmap src) {
return toAlpha(src, false);
}
/**
* 轉為alpha點陣圖
*
* @param src 源圖片
* @param recycle 是否回收
* @return alpha點陣圖
*/
public static Bitmap toAlpha(Bitmap src, Boolean recycle) {
if (isEmptyBitmap(src)) return null;
Bitmap ret = src.extractAlpha();
if (recycle && !src.isRecycled()) src.recycle();
return ret;
}
/**
* 轉為灰度圖片
*
* @param src 源圖片
* @return 灰度圖
*/
public static Bitmap toGray(Bitmap src) {
return toGray(src, false);
}
/**
* 轉為灰度圖片
*
* @param src 源圖片
* @param recycle 是否回收
* @return 灰度圖
*/
public static Bitmap toGray(Bitmap src, boolean recycle) {
if (isEmptyBitmap(src)) return null;
Bitmap grayBitmap = Bitmap.createBitmap(src.getWidth(),
src.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(grayBitmap);
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 grayBitmap;
}
/**
* 儲存圖片
*
* @param src 源圖片
* @param filePath 要儲存到的檔案路徑
* @param format 格式
* @return {@code true}: 成功<br>{@code false}: 失敗
*/
public static boolean save(Bitmap src, String filePath, CompressFormat format) {
return save(src, FileUtils.getFileByPath(filePath), format, false);
}
/**
* 儲存圖片
*
* @param src 源圖片
* @param file 要儲存到的檔案
* @param format 格式
* @return {@code true}: 成功<br>{@code false}: 失敗
*/
public static boolean save(Bitmap src, File file, CompressFormat format) {
return save(src, file, format, false);
}
/**
* 儲存圖片
*
* @param src 源圖片
* @param filePath 要儲存到的檔案路徑
* @param format 格式
* @param recycle 是否回收
* @return {@code true}: 成功<br>{@code false}: 失敗
*/
public static boolean save(Bitmap src, String filePath, CompressFormat format, boolean recycle) {
return save(src, FileUtils.getFileByPath(filePath), format, recycle);
}
/**
* 儲存圖片
*
* @param src 源圖片
* @param file 要儲存到的檔案
* @param format 格式
* @param recycle 是否回收
* @return {@code true}: 成功<br>{@code false}: 失敗
*/
public static boolean save(Bitmap src, File file, CompressFormat format, boolean recycle) {
if (isEmptyBitmap(src) || !FileUtils.createOrExistsFile(file)) return false;
System.out.println(src.getWidth() + ", " + src.getHeight());
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 {
CloseUtils.closeIO(os);
}
return ret;
}
/**
* 根據檔名判斷檔案是否為圖片
*
* @param file 檔案
* @return {@code true}: 是<br>{@code false}: 否
*/
public static boolean isImage(File file) {
return file != null && isImage(file.getPath());
}
/**
* 根據檔名判斷檔案是否為圖片
*
* @param filePath 檔案路徑
* @return {@code true}: 是<br>{@code false}: 否
*/
public static boolean isImage(String filePath) {
String path = filePath.toUpperCase();
return path.endsWith(".PNG") || path.endsWith(".JPG")
|| path.endsWith(".JPEG") || path.endsWith(".BMP")
|| path.endsWith(".GIF");
}
/**
* 獲取圖片型別
*
* @param filePath 檔案路徑
* @return 圖片型別
*/
public static String getImageType(String filePath) {
return getImageType(FileUtils.getFileByPath(filePath));
}
/**
* 獲取圖片型別
*
* @param file 檔案
* @return 圖片型別
*/
public static String getImageType(File file) {
if (file == null) return null;
InputStream is = null;
try {
is = new FileInputStream(file);
return getImageType(is);
} catch (IOException e) {
e.printStackTrace();
return null;
} finally {
CloseUtils.closeIO(is);
}
}
/**
* 流獲取圖片型別
*
* @param is 圖片輸入流
* @return 圖片型別
*/
public static String getImageType(InputStream is) {
if (is == null) return null;
try {
byte[] bytes = new byte[8];
return is.read(bytes, 0, 8) != -1 ? getImageType(bytes) : null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
/**
* 獲取圖片型別
*
* @param bytes bitmap的前8位元組
* @return 圖片型別
*/
public static String getImageType(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(byte[] b) {
return b.length >= 2
&& (b[0] == (byte) 0xFF) && (b[1] == (byte) 0xD8);
}
private static boolean isGIF(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(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(byte[] b) {
return b.length >= 2
&& (b[0] == 0x42) && (b[1] == 0x4d);
}
/**
* 判斷bitmap物件是否為空
*
* @param src 源圖片
* @return {@code true}: 是<br>{@code false}: 否
*/
private static boolean isEmptyBitmap(Bitmap src) {
return src == null || src.getWidth() == 0 || src.getHeight() == 0;
}
/******************************~~~~~~~~~ 下方和壓縮有關 ~~~~~~~~~******************************/
/**
* 按縮放壓縮
*
* @param src 源圖片
* @param newWidth 新寬度
* @param newHeight 新高度
* @return 縮放壓縮後的圖片
*/
public static Bitmap compressByScale(Bitmap src, int newWidth, int newHeight) {
return scale(src, newWidth, newHeight, false);
}
/**
* 按縮放壓縮
*
* @param src 源圖片
* @param newWidth 新寬度
* @param newHeight 新高度
* @param recycle 是否回收
* @return 縮放壓縮後的圖片
*/
public static Bitmap compressByScale(Bitmap src, int newWidth, int newHeight, boolean recycle) {
return scale(src, newWidth, newHeight, recycle);
}
/**
* 按縮放壓縮
*
* @param src 源圖片
* @param scaleWidth 縮放寬度倍數
* @param scaleHeight 縮放高度倍數
* @return 縮放壓縮後的圖片
*/
public static Bitmap compressByScale(Bitmap src, float scaleWidth, float scaleHeight) {
return scale(src, scaleWidth, scaleHeight, false);
}
/**
* 按縮放壓縮
*
* @param src 源圖片
* @param scaleWidth 縮放寬度倍數
* @param scaleHeight 縮放高度倍數
* @param recycle 是否回收
* @return 縮放壓縮後的圖片
*/
public static Bitmap compressByScale(Bitmap src, float scaleWidth, float scaleHeight, boolean recycle) {
return scale(src, scaleWidth, scaleHeight, recycle);
}
/**
* 按質量壓縮
*
* @param src 源圖片
* @param quality 質量
* @return 質量壓縮後的圖片
*/
public static Bitmap compressByQuality(Bitmap src, @IntRange(from = 0, to = 100) int quality) {
return compressByQuality(src, quality, false);
}
/**
* 按質量壓縮
*
* @param src 源圖片
* @param quality 質量
* @param recycle 是否回收
* @return 質量壓縮後的圖片
*/
public static Bitmap compressByQuality(Bitmap src, @IntRange(from = 0, to = 100) int quality, 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);
}
/**
* 按質量壓縮
*
* @param src 源圖片
* @param maxByteSize 允許最大值位元組數
* @return 質量壓縮壓縮過的圖片
*/
public static Bitmap compressByQuality(Bitmap src, long maxByteSize) {
return compressByQuality(src, maxByteSize, false);
}
/**
* 按質量壓縮
*
* @param src 源圖片
* @param maxByteSize 允許最大值位元組數
* @param recycle 是否回收
* @return 質量壓縮壓縮過的圖片
*/
public static Bitmap compressByQuality(Bitmap src, long maxByteSize, boolean recycle) {
if (isEmptyBitmap(src) || maxByteSize <= 0) return null;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int quality = 100;
src.compress(CompressFormat.JPEG, quality, baos);
while (baos.toByteArray().length > maxByteSize && quality > 0) {
baos.reset();
src.compress(CompressFormat.JPEG, quality -= 5, baos);
}
if (quality < 0) return null;
byte[] bytes = baos.toByteArray();
if (recycle && !src.isRecycled()) src.recycle();
return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
}
/**
* 按取樣大小壓縮
*
* @param src 源圖片
* @param sampleSize 取樣率大小
* @return 按取樣率壓縮後的圖片
*/
public static Bitmap compressBySampleSize(Bitmap src, int sampleSize) {
return compressBySampleSize(src, sampleSize, false);
}
/**
* 按取樣大小壓縮
*
* @param src 源圖片
* @param sampleSize 取樣率大小
* @param recycle 是否回收
* @return 按取樣率壓縮後的圖片
*/
public static Bitmap compressBySampleSize(Bitmap src, int sampleSize, 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);
}
}
https://www.jianshu.com/p/514dc0114327
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