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| #define | RINT() |
| #define | ROUND() |
| #define | SIGNED_ROUND() |
| #define | SQR() |
| #define | MAX255() |
| #define | CLAMP0255() |
| #define | SAFE_CLAMP() |
| #define | gimp_deg_to_rad() |
| #define | gimp_rad_to_deg() |
Mathematical definitions and macros for use both by the GIMP application and plug-ins. These macros should be used rather than the ones from <math.h> for enhanced portability.
#define RINT(x) rint(x)
This macro rounds its argument x
to an integer value in floating
point format. Use RINT() instead of rint().
#define ROUND(x) ((int) ((x) + 0.5))
This macro rounds its positive argument x
to the nearest integer.
#define SIGNED_ROUND(x) ((int) RINT (x))
This macro rounds its argument x
to the nearest integer.
#define MAX255(a) ((a) | (((a) & 256) - (((a) & 256) >> 8)))
This macro limits it argument a
, an (0-511) int, to 255.
#define CLAMP0255(a) CLAMP(a,0,255)
This macro clamps its argument a
, an int32-range int, between 0
and 255 inclusive.
#define SAFE_CLAMP(x, low, high) ((x) > (low) ? (x) < (high) ? (x) : (high) : (low))
Ensures that x
is between the limits set by low
and high
,
even if x
is NaN. If low
is greater than high
, or if either
of them is NaN, the result is undefined.
Since: 2.10
#define gimp_deg_to_rad(angle) ((angle) * (2.0 * G_PI) / 360.0)
This macro converts its argument angle
from degree to radian.