This makes the GTK resource handling configurable in the same way as
all other pkg-config style feature options.
It is now possible to completely disable compiled in resources if
wanted as well as forcing inline pixdata on if desired.
Before GResource it was possible to compile pixbufs as inline
elements. This has historically been done for the menu cursor
only.
This change integrates the inline support and uses it when the
GResource support is not selected.
GTK UI builder resources have till now been exclusively stored on disc
requiring netsurf to ship numerous additional resource files. This
requires going to disc every time a UI action is performed which can
become a lot of unwanted file handling.
GLib/GTK has moved towards GResource handling for such resources
instead. It now seems that migrating to this style of usage is
expected and indeed the only portable way to include pixbufs.
This introduces an API to hide the various implementation details of
how resources are handled from the rest of the codebase.
This reduces logging overhead by only calling the log output function
once instead of three times.
Additionally the nslog_gettime interface no longer needs to be
exported and the static function is directly inlined further reducing
function call overhead.
Finally the appending of a newline uses fputc instead of a full printf
call which is considerably more simple and further reduces overhead
time.
This changes the LOG macro to be varadic removing the need for all
callsites to have double bracketing and allows for future improvement
on how we use the logging macros.
The callsites were changed with coccinelle and the changes checked by
hand. Compile tested for several frontends but not all.
A formatting annotation has also been added which allows the compiler
to check the parameters and types passed to the logging.
The compiled in image resources were being created as a structure in a
generated c source file. The generation of this file caused constness
warning as a guint8 * was initialised from a const char array.
This changes the generation and use of these compiled in resources to
use the raw inline form as suggested by the documentation removing the
const warning.
Obtaining a netsurf bitmap buffer may fail on some frontends (RISC OS
especially) as the bitmap allocation is not performed until the
buffer is requested. The PNG image handler failed to check for this
when populating the row pointer structure.
On some OS the ftruncate operation can take some time so move it to
occour in the background maintinance operations instead of when data
blocks are initialy opened. This should improve browsing responsiveness.
This makes the box_move_xy function return a value on all code
paths. This was not really necessary as there is an assert in the path
that could have returned without a value. The gcc optimiser seems
unable to reason about this in this case causing a warning.
It seems many filesystems are greatly more efficient if the block file
is allocated its entire extent once rather than trying to
continuously grown the file later.
The size of the block files is known at their creation time so this
change ensures they are grown to the full possible extent hence removing
future inefficient writes.
The ftell call in the html renderer handling of drag and drop was not
checking its return value for errors which could have resulted in
attempting to read -1 bytes.
coverity 1251038
