Enlarge the embedded arrays of edges and points for cairo_polygon_t and
cairo_spline_t respectively, such that the frequent allocations are
eliminated whilst running a firefox3 benchmark.
Every time we assign or return a hard-coded error status wrap that value
with a call to _cairo_error(). So the idiom becomes:
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
or
return _cairo_error (CAIRO_STATUS_INVALID_DASH);
This ensures that a breakpoint placed on _cairo_error() will trigger
immediately cairo detects the error.
This patch introduces three macros: _cairo_malloc_ab,
_cairo_malloc_abc, _cairo_malloc_ab_plus_c and replaces various calls
to malloc(a*b), malloc(a*b*c), and malloc(a*b+c) with them. The macros
return NULL if int overflow would occur during the allocation. See
CODING_STYLE for more information.
Now, the functions to add new data to a polygon all become void,
and there's a new _cairo_polygon_status call to query the status
at the end of a sequence of operations.
With this change, we fix many callerswhich were previously not
checking the return values of _cairo_polygon functions by adding
only a single call to _cairo_polygon_status rathern than several
new checks.
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.
This patch was produced with the following (GNU) sed script:
sed -i -r -e 's/[ \t]+$//'
run on all *.[ch] files within cairo.
Note that the above script would have also created all the changes
from the previous commits to remove trailing whitespace.
Use cairo_point_double_t not XPointDouble, (to avoid false dependency on X headers). Thanks to "Sasha V." <sasha@aftercode.net> for pointing these out.
