This is necessary to avoid many portability problems as cairoint.h includes
config.h. Without a test, we will regress again, hence add it.
The inclusion idiom for cairo now is:
#include "cairoint.h"
#include "cairo-something.h"
#include "cairo-anotherthing-private.h"
#include <some-library.h>
#include <other-library/other-file.h>
Moreover, some standard headers files are included from cairoint.h and need
not be included again.
Quartz and Xlib both define Picture and Cursor, and clashed in
cairo-boilerplate.c. Splitting quartz out allows a single mac
build with --enable-quartz --enable-atsui.
Previously, the convention was that static ones started with cairo_, but
renamed to start with _cairo_ when they were needed from other files and
became cairo_private instead of static...
This is error prune indeed, and two symbols were already violating. Now
all nil objects start with _cairo_.
The reference image is no longer the correct size, so isn't
providing a comparison at all. In the absence of a better
replacement, removing it at least gives us diffs.
Frequently cairo_set_source_rgb[a]() is used to replace the current
solid-pattern source with a new one of a different colour. The current
pattern is very likely to be unshared and unmodified and so it is likely
just to be immediately freed [or rather simply moved to recently freed
cache]. However as the last active pattern it is likely to cache-warm and
suitable to satisfy the forthcoming allocation. So by setting the current
pattern to 'none' we can move the pattern to the freed list before we
create the new pattern and hopefully immediately reuse it.
Unfortunately one cannot cache live patterns and return a fresh reference
instead of creating new ones as patterns can be modified by the user and
so cannot be transparently shared between different users. However,
solid colour allocation is still a frequent operation, so we maintain a
small cache of recently freed patterns to reduce the malloc pressure.
We use a small cache of size 16 for patterns created from solid colors,
e.g. cairo_set_source_rgb(). This helps with toolkits that draw many
widgets using the same colour scheme.
The cache uses a static index variable, which itself acts like a cache
of size 1, remembering the most recently used colour. So repeated
lookups for the same colour hit immediately. If that fails, the cache
is searched linearly, and if that fails too, a new pattern is created
and a random member of the cache is evicted.
All mutex declarations have been moved to cairo-mutex-list.h.
This should avoid breaking of less frequently tested backends,
when mutexes are introduced or when existing mutexes are renamed.
Instead of initializing mutexes on library startup, mutexes are
lazily initialized within the few entry points of now by calling
CAIRO_MUTEX_INITIALIZE(). Currently only the OS/2 backend takes
care about releasing global mutexes. Therefore there is no counter
part of that macro for finalizing all global mutexes yet - but
as cairo-backend-os2.c shows such a function would be quite
easy to implement.
