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SDL_Rect: Use a default epsilon in SDL_FRectEquals() 

Add SDL_FRectEqualsEpsilon() for when more control over
equality test is required.
This commit is contained in:
Eddy Jansson 2022-04-20 05:46:45 +02:00 committed by Sam Lantinga
parent 00feca27b0
commit fc944859d1
1 changed files with 19 additions and 3 deletions
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22
include/SDL_rect.h
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@ -239,12 +239,28 @@ SDL_FORCE_INLINE SDL_bool SDL_FRectEmpty(const SDL_FRect *r)
} }
/** /**
* Returns true if the two rectangles are equal. * Returns true if the two rectangles are equal, within some given epsilon.
*
* \since This function is available since SDL 2.0.22.
*/
SDL_FORCE_INLINE SDL_bool SDL_FRectEqualsEpsilon(const SDL_FRect *a, const SDL_FRect *b, const float epsilon)
{
return (a && b && ((a == b) ||
((SDL_fabs(a->x - b->x) <= epsilon) &&
(SDL_fabs(a->y - b->y) <= epsilon) &&
(SDL_fabs(a->w - b->w) <= epsilon) &&
(SDL_fabs(a->h - b->h) <= epsilon))))
? SDL_TRUE : SDL_FALSE;
}
/**
* Returns true if the two rectangles are equal, using a default epsilon.
*
* \since This function is available since SDL 2.0.22.
*/ */
SDL_FORCE_INLINE SDL_bool SDL_FRectEquals(const SDL_FRect *a, const SDL_FRect *b) SDL_FORCE_INLINE SDL_bool SDL_FRectEquals(const SDL_FRect *a, const SDL_FRect *b)
{ {
return (a && b && (a->x == b->x) && (a->y == b->y) && return SDL_FRectEqualsEpsilon(a, b, SDL_FLT_EPSILON);
(a->w == b->w) && (a->h == b->h)) ? SDL_TRUE : SDL_FALSE;
} }
/** /**