table of contents
al_ftofix(3) | al_ftofix(3) |
NAME¶
al_ftofix - Allegro 5 API
SYNOPSIS¶
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#include <allegro5/allegro.h> al_fixed al_ftofix(double x);
DESCRIPTION¶
Converts a floating point value to fixed point. Unlike al_itofix(3), this function clamps values which could overflow the type conversion, setting Allegro’s errno to ERANGE in the process if this happens.
Example:
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al_fixed number; number = al_itofix(-40000); assert(al_fixfloor(number) == -32768); number = al_itofix(64000); assert(al_fixfloor(number) == 32767); assert(!al_get_errno()); /* This will fail. */
RETURN VALUE¶
Returns the value of the floating point value converted to fixed point clamping overflows (and setting Allegro’s errno).
SEE ALSO¶
Allegro reference manual |