Re: [9front] Libpng and Zlib updates on the ports tree

[jamos@oboj.net]

Kenji,

I am glad you worked it out. I was preparing a lengthy reply detailing 
what you already found out now. I am waiting for libpng to compile 
cleanly in ports before I change the mkfile to include support. JPEG 
already works though. As an alternative to changing PNG_ZLIB_VERNUM you 
can apply Uramekus patch. Do your nsfb still crash viewing BBC News 
(linked from the welcome page)? It has started to work for me.

> 1) use /sys/ports/ape-libs/ libjpeg libpng zlib, the last can replace 
> /sys/src/ape/lib/z
> 2) the zlib's version is 1.2.7, then one line change of 
> ape-libs/libpng/work/libpng-1.6.17/pnglibcon.h
> #define PNG_ZLIB_VERNUM 0x1280
> to:
> #define PNG_ZLIB_VERNUM 0x1270
> compile above.
> 
> 3) nsport/netsurf/mkfile, uncomment
> #    content/handlers/image/jpeg.$O \
> #    content/handlers/image/png.$O \
> 
> CC=pcc -DWITH_BMP -DWITH_GIF -DWITH_BMP -DWITH_JPEG -DWITH_PNG

One might ask why to link against libjpeg and libpng when image viewing 
functions are alredy available natively in 9front. This is a valid 
question, but as it stands, netsurf as a whole is compiled using APE, 
and its viewers are made to use libjpeg and libpng which are also APE 
libs. At least we have avoided including ‘libgnu’ (an extension of APE, 
also available in ports, using a lot of messy GNU code) and are only 
using standard APE and some support libraries that also use standard APE 
to compile.

Jonas