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| author | Robert Bragg <robert@linux.intel.com> | 2011-07-12 01:02:43 +0100 |
|---|---|---|
| committer | Robert Bragg <robert@linux.intel.com> | 2011-07-14 13:54:05 +0100 |
| commit | 32487af55b72e5a1be34176bc462ff11d8d378fc (patch) | |
| tree | 478db94c2c19183a9b755378c97d6a1fab4f09c7 | |
| parent | ad234b303ca557c5f9bc34e0f4dfb0b3b619c865 (diff) | |
| download | clutter-32487af55b72e5a1be34176bc462ff11d8d378fc.tar.gz | |
Adds a CLUTTER_NEARBYINT macro for float rounding
This is a replacement for the nearbyint function which always rounds to
the nearest integer. nearbyint is a C99 function so it might not always
be available but also it seems in glibc it is defined as a function call
so this macro could end up faster anyway. We can't just add 0.5 because
it will break for negative numbers.
Signed-off-by: Neil Roberts <neil@linux.intel.com>
Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
| -rw-r--r-- | clutter/clutter-private.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/clutter/clutter-private.h b/clutter/clutter-private.h index 2c3dd6eb9..e9d0bd26b 100644 --- a/clutter/clutter-private.h +++ b/clutter/clutter-private.h @@ -84,6 +84,13 @@ typedef struct _ClutterMainContext ClutterMainContext; #define P_(String) (String) #endif +/* This is a replacement for the nearbyint function which always rounds to the + * nearest integer. nearbyint is apparently a C99 function so it might not + * always be available but also it seems in glibc it is defined as a function + * call so this macro could end up faster anyway. We can't just add 0.5f + * because it will break for negative numbers. */ +#define CLUTTER_NEARBYINT(x) ((int) ((x) < 0.0f ? (x) - 0.5f : (x) + 0.5f)) + typedef enum { CLUTTER_ACTOR_UNUSED_FLAG = 0, |