[Buildroot] [PATCH 2/2] libvncserver: add config option for tightpng encoding support

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Dear Floris Bos,

On Fri, 26 Dec 2014 18:37:15 +0100, Floris Bos wrote:

> JPEG and PNG are both necesarry.
> 
> Libvncserver will only compile tight.c if HAVE_LIBJPEG
> 
> https://github.com/LibVNC/libvncserver/blob/master/libvncserver/Makefile.am#L49
> 
> And inside tight.c png is optional, jpeg is not.

Ok, so I believe we should rather do:

+config BR2_PACKAGE_LIBVNCSERVER_TIGHTPNG
+	bool "TightPNG encoding support"
+	select BR2_PACKAGE_JPEG
+	select BR2_PACKAGE_LIBPNG
+	help
+	  TightPNG encoding speeds up HTML5 based VNC clients like noVNC.
+
+	  http://wiki.qemu.org/VNC_Tight_PNG

in Config.in (i.e as you did)

And then in libvncserver.mk, do:

ifeq ($(BR2_PACKAGE_LIBPNG),y)
LIBVNCSERVER_DEPENDENCIES += libpng
else
LIBVNCSERVER_CONF_OPTS += --without-png
endif

This way, people not using tightpng support but having libpng enabled
will have PNG support in libvncserver.

Can you rework your patch in this direction?

Thanks,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com