mac上使用imagealpha命令对图片进行压缩批处理

1 #! /bin/bash
2 
3 
4 #BASE_DIR="/Users/jiading/Documents/basepng";
5 #OUTPUT_DIR="/Users/jiading/Documents/output";
6 BASE_DIR="/Users/jiading/Documents/SwordsmanApp/art/序列帧动画/实验-分段版/9_选择迷你板固定";
7 OUTPUT_DIR="/Users/jiading/Documents/SwordsmanApp/art/序列帧动画/实验-分段版output最强压缩9";
8 
9 CUR_READ_DIR="";
10 CUR_WRITE_DIR="";
11 
12 
13 dopng(){
14 
15 readPng=$1;
16 writePng=$2;
17 fileName=$3;
18 fileName=${fileName%.*}".png";
19 echo "图片: "$fileName;
20 
21 #speed  1-11
22 
23 sudo /Applications/ImageAlpha.app/Contents/MacOS/pngquant -f $readPng -o $writePng"/$fileName" --quality 10 --speed 1 --nofs  --posterize 0
24 
25 
26 }
27 
28 
29 loopDir(){
30 
31 #1进入当前读取目录
32 cd $1;
33 
34    for file in *;
35          do
36 
37 localReadDir=$1;
38 localWriteDir=$2;
39 
40 
41         if [ -d $file ];then
42             echo $file"is a dir";
43 
44 #2进入一个目录
45 CUR_WRITE_DIR=$localWriteDir"/$file"
46 
47 #3创建对应新目录
48 echo "创建目录："$CUR_WRITE_DIR;
49 mkdir $CUR_WRITE_DIR
50 
51 #4进入下一级遍历
52 loopDir $localReadDir"/$file" $localWriteDir"/$file"
53 
54 #5下一级遍历完之后回到当前目录
55 cd $1;
56 
57         elif [ -f $file ];then
58 
59 
60         dopng $localReadDir"/$file" $localWriteDir "$file"
61 
62 fi
63 
64 done
65 
66 }
67 
68 main(){
69 
70 #1,删掉旧目录
71 if [ -d $OUTPUT_DIR ];then
72 echo "ouput目录已存在，立马删除";
73 rm -rf $OUTPUT_DIR
74 fi
75 
76 #2,创建output跟目录
77 mkdir $OUTPUT_DIR
78 
79 
80 #3,开始遍历读取
81 CUR_READ_DIR=$BASE_DIR
82 CUR_WRITE_DIR=$OUTPUT_DIR
83 loopDir $CUR_READ_DIR $CUR_WRITE_DIR
84 
85 echo "=-=-=-压缩完成=-=-=-="
86 }
87 
88 main