linux:安装png的库libpng(rocky linux 9.2)

一，dwebp/cwebp缺少libpng库时的报错:

[root@localhost work]# dwebp a.webp -o a.png
Decoded a.webp. Dimensions: 856 x 300 . Format: lossy. Now saving...
PNG support not compiled. Please install the libpng development package before building.
You can run with -ppm flag to decode in PPM format.
Error writing file a.png !!

二，安装libpng:

1,官方地址:

https://www.linuxfromscratch.org/blfs/view/svn/general/libpng.html

如图:

2,下载:

[root@localhost imagemagick]# wget https://downloads.sourceforge.net/libpng/libpng-1.6.40.tar.xz

解压:

[root@localhost imagemagick]# xz -d libpng-1.6.40.tar.xz
[root@localhost imagemagick]# tar xvf libpng-1.6.40.tar

3,配置:

[root@localhost libpng-1.6.40]# ./configure --prefix=/usr --disable-static

4,编译:

[root@localhost libpng-1.6.40]# make

5,测试

[root@localhost libpng-1.6.40]# make check

6,安装

[root@localhost libpng-1.6.40]# make install

7,安装手册:

[root@localhost libpng-1.6.40]# mkdir -v /usr/share/doc/libpng-1.6.40
mkdir: 已创建目录 '/usr/share/doc/libpng-1.6.40'
[root@localhost libpng-1.6.40]# cp -v README libpng-manual.txt /usr/share/doc/libpng-1.6.40
'README' -> '/usr/share/doc/libpng-1.6.40/README'
'libpng-manual.txt' -> '/usr/share/doc/libpng-1.6.40/libpng-manual.txt’

说明：刘宏缔的架构森林—专注it技术的博客，
网站：https://blog.imgtouch.com
原文: https://blog.imgtouch.com/index.php/2023/07/12/linux-an-zhuang-png-de-ku-libpng-rocky-linux-9-2/
代码: https://github.com/liuhongdi/ 或 https://gitee.com/liuhongdi
说明：作者:刘宏缔 邮箱: [email protected]

三，测试效果:

webp重新编译安装后再次执行:

[root@localhost work]# dwebp a.webp -o a2.png
Decoded a.webp. Dimensions: 856 x 300 . Format: lossy. Now saving...
Saved file a2.png

四，查看linux的版本:

[root@localhost ImageMagick-7.1.1-12]# cat /etc/redhat-release
Rocky Linux release 9.2 (Blue Onyx)