Introduction to libpng
The libpng package contains libraries used by other programs for
reading and writing PNG files. The PNG format was designed as a
replacement for GIF and, to a lesser extent, TIFF, with many
improvements and extensions and lack of patent problems.
Additional Downloads
Installation of libpng
If you want to patch libpng to support apng files, apply it here:
gzip -cd ../libpng-1.6.47-apng.patch.gz | patch -p1
Install libpng by running the following commands:
./configure --prefix=/usr --disable-static &&
make
Now, as the root user:
make install &&
mkdir -v /usr/share/doc/libpng-1.6.50 &&
cp -v README libpng-manual.txt /usr/share/doc/libpng-1.6.50
lib32 Installation of libpng
Install lib32-libpng by running the following commands:
make distclean &&
CC="gcc -m32" CXX="g++ -m32" \
PKG_CONFIG_PATH=/usr/lib32/pkgconfig \
./configure --prefix=/usr \
--libdir=/usr/lib32 \
--host=i686-pc-linux-gnu \
--disable-static &&
make
Now, as the root user:
make DESTDIR=$PWD/DESTDIR install &&
cp -vr DESTDIR/usr/lib32/* /usr/lib32 &&
rm -rf DESTDIR &&
ldconfig
Command Explanations
![[Note]](../images/note.png)
Note
Run ./configure
--help for a full list of options.
--disable-static: This
switch prevents installation of static versions of the libraries.
Contents
Installed Programs:
libpng-config (symlink), libpng16-config,
pngfix, and png-fix-itxt
Installed Libraries:
libpng
Installed Directories:
/usr/include/libpng16 and
/usr/share/doc/libpng-1.6.50
Short Descriptions
|
pngfix
|
tests, optimizes and optionally fixes the zlib header in
PNG files. Optionally, when fixing, strips ancillary
chunks from the file
|
|
png-fix-itxt
|
fixes PNG files that have an incorrect length field in
the iTXt chunks
|
|
libpng-config
|
is a shell script that provides configuration information
for applications wanting to use libpng
|
|
libpng
|
contain routines used to create and manipulate PNG format
graphics files
|