Safe Haskell	None
Language	GHC2021

SDL3.Sys.Bindgen.Rect.Unsafe

Synopsis

sDL_RectToFRect :: PtrConst SDL_Rect -> Ptr SDL_FRect -> IO ()
sDL_PointInRect :: PtrConst SDL_Point -> PtrConst SDL_Rect -> IO CBool
sDL_RectEmpty :: PtrConst SDL_Rect -> IO CBool
sDL_RectsEqual :: PtrConst SDL_Rect -> PtrConst SDL_Rect -> IO CBool
sDL_HasRectIntersection :: PtrConst SDL_Rect -> PtrConst SDL_Rect -> IO CBool
sDL_GetRectIntersection :: PtrConst SDL_Rect -> PtrConst SDL_Rect -> Ptr SDL_Rect -> IO CBool
sDL_GetRectUnion :: PtrConst SDL_Rect -> PtrConst SDL_Rect -> Ptr SDL_Rect -> IO CBool
sDL_GetRectEnclosingPoints :: PtrConst SDL_Point -> CInt -> PtrConst SDL_Rect -> Ptr SDL_Rect -> IO CBool
sDL_GetRectAndLineIntersection :: PtrConst SDL_Rect -> Ptr CInt -> Ptr CInt -> Ptr CInt -> Ptr CInt -> IO CBool
sDL_PointInRectFloat :: PtrConst SDL_FPoint -> PtrConst SDL_FRect -> IO CBool
sDL_RectEmptyFloat :: PtrConst SDL_FRect -> IO CBool
sDL_RectsEqualEpsilon :: PtrConst SDL_FRect -> PtrConst SDL_FRect -> CFloat -> IO CBool
sDL_RectsEqualFloat :: PtrConst SDL_FRect -> PtrConst SDL_FRect -> IO CBool
sDL_HasRectIntersectionFloat :: PtrConst SDL_FRect -> PtrConst SDL_FRect -> IO CBool
sDL_GetRectIntersectionFloat :: PtrConst SDL_FRect -> PtrConst SDL_FRect -> Ptr SDL_FRect -> IO CBool
sDL_GetRectUnionFloat :: PtrConst SDL_FRect -> PtrConst SDL_FRect -> Ptr SDL_FRect -> IO CBool
sDL_GetRectEnclosingPointsFloat :: PtrConst SDL_FPoint -> CInt -> PtrConst SDL_FRect -> Ptr SDL_FRect -> IO CBool
sDL_GetRectAndLineIntersectionFloat :: PtrConst SDL_FRect -> Ptr CFloat -> Ptr CFloat -> Ptr CFloat -> Ptr CFloat -> IO CBool

Documentation

sDL_RectToFRect Source #

Arguments

:: PtrConst SDL_Rect	`rect` a pointer to an `SDL_Rect`.
-> Ptr SDL_FRect	`frect` a pointer filled in with the floating point representation of `rect`.
-> IO ()

Convert an SDL_Rect to SDL_FRect

Thread safety: It is safe to call this function from any thread.
C declaration: SDL_RectToFRect, defined at SDL3/SDL_rect.h 129:23

Since: 3.2.0

sDL_PointInRect Source #

Arguments

:: PtrConst SDL_Point	`p` the point to test.
-> PtrConst SDL_Rect	`r` the rectangle to test.
-> IO CBool

Determine whether a point resides inside a rectangle.

A point is considered part of a rectangle if both p and r are not NULL, and p 's x and y coordinates are >= to the rectangle's top left corner, and < the rectangle's x+w and y+h. So a 1x1 rectangle considers point (0,0) as "inside" and (0,1) as not.

Note that this is a forced-inline function in a header, and not a public API function available in the SDL library (which is to say, the code is embedded in the calling program and the linker and dynamic loader will not be able to find this function inside SDL itself).

Returns: true if p is contained by r, false otherwise.
Thread safety: It is safe to call this function from any thread.
C declaration: SDL_PointInRect, defined at SDL3/SDL_rect.h 158:23

Since: 3.2.0

sDL_RectEmpty Source #

Arguments

:: PtrConst SDL_Rect	`r` the rectangle to test.
-> IO CBool

Determine whether a rectangle has no area.

A rectangle is considered "empty" for this function if r is NULL, or if r 's width and/or height are <= 0.

Note that this is a forced-inline function in a header, and not a public API function available in the SDL library (which is to say, the code is embedded in the calling program and the linker and dynamic loader will not be able to find this function inside SDL itself).

Returns: true if the rectangle is "empty", false otherwise.
Thread safety: It is safe to call this function from any thread.
C declaration: SDL_RectEmpty, defined at SDL3/SDL_rect.h 182:23

Since: 3.2.0

sDL_RectsEqual Source #

Arguments

:: PtrConst SDL_Rect	`a` the first rectangle to test.
-> PtrConst SDL_Rect	`b` the second rectangle to test.
-> IO CBool

Determine whether two rectangles are equal.

Rectangles are considered equal if both are not NULL and each of their x, y, width and height match.

Note that this is a forced-inline function in a header, and not a public API function available in the SDL library (which is to say, the code is embedded in the calling program and the linker and dynamic loader will not be able to find this function inside SDL itself).

Returns: true if the rectangles are equal, false otherwise.
Thread safety: It is safe to call this function from any thread.
C declaration: SDL_RectsEqual, defined at SDL3/SDL_rect.h 206:23

Since: 3.2.0

sDL_HasRectIntersection Source #

Arguments

:: PtrConst SDL_Rect	`A` an `SDL_Rect` structure representing the first rectangle.
-> PtrConst SDL_Rect	`B` an `SDL_Rect` structure representing the second rectangle.
-> IO CBool

Determine whether two rectangles intersect.

If either pointer is NULL the function will return false.

Returns: true if there is an intersection, false otherwise.
Thread safety: It is safe to call this function from any thread.
See also: sDL_GetRectIntersection
C declaration: SDL_HasRectIntersection, defined at SDL3/SDL_rect.h 227:34

Since: 3.2.0

sDL_GetRectIntersection Source #

Arguments

:: PtrConst SDL_Rect	`A` an `SDL_Rect` structure representing the first rectangle.
-> PtrConst SDL_Rect	`B` an `SDL_Rect` structure representing the second rectangle.
-> Ptr SDL_Rect	`result` an `SDL_Rect` structure filled in with the intersection of rectangles `A` and `B`.
-> IO CBool

Calculate the intersection of two rectangles.

If result is NULL then this function will return false.

Returns: true if there is an intersection, false otherwise.
Thread safety: It is safe to call this function from any thread.
See also: sDL_HasRectIntersection
C declaration: SDL_GetRectIntersection, defined at SDL3/SDL_rect.h 246:34

Since: 3.2.0

sDL_GetRectUnion Source #

Arguments

:: PtrConst SDL_Rect	`A` an `SDL_Rect` structure representing the first rectangle.
-> PtrConst SDL_Rect	`B` an `SDL_Rect` structure representing the second rectangle.
-> Ptr SDL_Rect	`result` an `SDL_Rect` structure filled in with the union of rectangles `A` and `B`.
-> IO CBool

Calculate the union of two rectangles.

Returns: true on success or false on failure; call SDL_GetError() for more information.
Thread safety: It is safe to call this function from any thread.
C declaration: SDL_GetRectUnion, defined at SDL3/SDL_rect.h 262:34

Since: 3.2.0

sDL_GetRectEnclosingPoints Source #

Arguments

:: PtrConst SDL_Point	`points` an array of `SDL_Point` structures representing points to be enclosed.
-> CInt	`count` the number of structures in the `points` array.
-> PtrConst SDL_Rect	`clip` an `SDL_Rect` used for clipping or NULL to enclose all points.
-> Ptr SDL_Rect	`result` an `SDL_Rect` structure filled in with the minimal enclosing rectangle.
-> IO CBool

Calculate a minimal rectangle enclosing a set of points.

If clip is not NULL then only points inside of the clipping rectangle are considered.

Returns: true if any points were enclosed or false if all the points were outside of the clipping rectangle.
Thread safety: It is safe to call this function from any thread.
C declaration: SDL_GetRectEnclosingPoints, defined at SDL3/SDL_rect.h 283:34

Since: 3.2.0

sDL_GetRectAndLineIntersection Source #

Arguments

:: PtrConst SDL_Rect	`rect` an `SDL_Rect` structure representing the rectangle to intersect.
-> Ptr CInt	`X1` a pointer to the starting X-coordinate of the line.
-> Ptr CInt	`Y1` a pointer to the starting Y-coordinate of the line.
-> Ptr CInt	`X2` a pointer to the ending X-coordinate of the line.
-> Ptr CInt	`Y2` a pointer to the ending Y-coordinate of the line.
-> IO CBool

Calculate the intersection of a rectangle and line segment.

This function is used to clip a line segment to a rectangle. A line segment contained entirely within the rectangle or that does not intersect will remain unchanged. A line segment that crosses the rectangle at either or both ends will be clipped to the boundary of the rectangle and the new coordinates saved in X1, Y1, X2, and/or Y2 as necessary.

Returns: true if there is an intersection, false otherwise.
Thread safety: It is safe to call this function from any thread.
C declaration: SDL_GetRectAndLineIntersection, defined at SDL3/SDL_rect.h 305:34

Since: 3.2.0

sDL_PointInRectFloat Source #

Arguments

:: PtrConst SDL_FPoint	`p` the point to test.
-> PtrConst SDL_FRect	`r` the rectangle to test.
-> IO CBool

Determine whether a point resides inside a floating point rectangle.

A point is considered part of a rectangle if both p and r are not NULL, and p 's x and y coordinates are >= to the rectangle's top left corner, and <= the rectangle's x+w and y+h. So a 1x1 rectangle considers point (0,0) and (0,1) as "inside" and (0,2) as not.

Note that this is a forced-inline function in a header, and not a public API function available in the SDL library (which is to say, the code is embedded in the calling program and the linker and dynamic loader will not be able to find this function inside SDL itself).

Returns: true if p is contained by r, false otherwise.
Thread safety: It is safe to call this function from any thread.
C declaration: SDL_PointInRectFloat, defined at SDL3/SDL_rect.h 331:23

Since: 3.2.0

sDL_RectEmptyFloat Source #

Arguments

:: PtrConst SDL_FRect	`r` the rectangle to test.
-> IO CBool

Determine whether a floating point rectangle takes no space.

A rectangle is considered "empty" for this function if r is NULL, or if r 's width and/or height are < 0.0f.

Note that this is a forced-inline function in a header, and not a public API function available in the SDL library (which is to say, the code is embedded in the calling program and the linker and dynamic loader will not be able to find this function inside SDL itself).

Returns: true if the rectangle is "empty", false otherwise.
Thread safety: It is safe to call this function from any thread.
C declaration: SDL_RectEmptyFloat, defined at SDL3/SDL_rect.h 355:23

Since: 3.2.0

sDL_RectsEqualEpsilon Source #

Arguments

:: PtrConst SDL_FRect	`a` the first rectangle to test.
-> PtrConst SDL_FRect	`b` the second rectangle to test.
-> CFloat	`epsilon` the epsilon value for comparison.
-> IO CBool

Determine whether two floating point rectangles are equal, within some given epsilon.

Rectangles are considered equal if both are not NULL and each of their x, y, width and height are within epsilon of each other. If you don't know what value to use for epsilon, you should call the SDL_RectsEqualFloat function instead.

Note that this is a forced-inline function in a header, and not a public API function available in the SDL library (which is to say, the code is embedded in the calling program and the linker and dynamic loader will not be able to find this function inside SDL itself).

Returns: true if the rectangles are equal, false otherwise.
Thread safety: It is safe to call this function from any thread.
See also: sDL_RectsEqualFloat
C declaration: SDL_RectsEqualEpsilon, defined at SDL3/SDL_rect.h 385:23

Since: 3.2.0

sDL_RectsEqualFloat Source #

Arguments

:: PtrConst SDL_FRect	`a` the first rectangle to test.
-> PtrConst SDL_FRect	`b` the second rectangle to test.
-> IO CBool

Determine whether two floating point rectangles are equal, within a default epsilon.

Rectangles are considered equal if both are not NULL and each of their x, y, width and height are within SDL_FLT_EPSILON of each other. This is often a reasonable way to compare two floating point rectangles and deal with the slight precision variations in floating point calculations that tend to pop up.

Note that this is a forced-inline function in a header, and not a public API function available in the SDL library (which is to say, the code is embedded in the calling program and the linker and dynamic loader will not be able to find this function inside SDL itself).

Returns: true if the rectangles are equal, false otherwise.
Thread safety: It is safe to call this function from any thread.
See also: sDL_RectsEqualEpsilon
C declaration: SDL_RectsEqualFloat, defined at SDL3/SDL_rect.h 420:23

Since: 3.2.0

sDL_HasRectIntersectionFloat Source #

Arguments

:: PtrConst SDL_FRect	`A` an `SDL_FRect` structure representing the first rectangle.
-> PtrConst SDL_FRect	`B` an `SDL_FRect` structure representing the second rectangle.
-> IO CBool

Determine whether two rectangles intersect with float precision.

If either pointer is NULL the function will return false.

Returns: true if there is an intersection, false otherwise.
Thread safety: It is safe to call this function from any thread.
See also: sDL_GetRectIntersectionFloat
C declaration: SDL_HasRectIntersectionFloat, defined at SDL3/SDL_rect.h 440:34

Since: 3.2.0

sDL_GetRectIntersectionFloat Source #

Arguments

:: PtrConst SDL_FRect	`A` an `SDL_FRect` structure representing the first rectangle.
-> PtrConst SDL_FRect	`B` an `SDL_FRect` structure representing the second rectangle.
-> Ptr SDL_FRect	`result` an `SDL_FRect` structure filled in with the intersection of rectangles `A` and `B`.
-> IO CBool

Calculate the intersection of two rectangles with float precision.

If result is NULL then this function will return false.

Returns: true if there is an intersection, false otherwise.
Thread safety: It is safe to call this function from any thread.
See also: sDL_HasRectIntersectionFloat
C declaration: SDL_GetRectIntersectionFloat, defined at SDL3/SDL_rect.h 459:34

Since: 3.2.0

sDL_GetRectUnionFloat Source #

Arguments

:: PtrConst SDL_FRect	`A` an `SDL_FRect` structure representing the first rectangle.
-> PtrConst SDL_FRect	`B` an `SDL_FRect` structure representing the second rectangle.
-> Ptr SDL_FRect	`result` an `SDL_FRect` structure filled in with the union of rectangles `A` and `B`.
-> IO CBool

Calculate the union of two rectangles with float precision.

Returns: true on success or false on failure; call SDL_GetError() for more information.
Thread safety: It is safe to call this function from any thread.
C declaration: SDL_GetRectUnionFloat, defined at SDL3/SDL_rect.h 475:34

Since: 3.2.0

sDL_GetRectEnclosingPointsFloat Source #

Arguments

:: PtrConst SDL_FPoint	`points` an array of `SDL_FPoint` structures representing points to be enclosed.
-> CInt	`count` the number of structures in the `points` array.
-> PtrConst SDL_FRect	`clip` an `SDL_FRect` used for clipping or NULL to enclose all points.
-> Ptr SDL_FRect	`result` an `SDL_FRect` structure filled in with the minimal enclosing rectangle.
-> IO CBool

Calculate a minimal rectangle enclosing a set of points with float precision.

If clip is not NULL then only points inside of the clipping rectangle are considered.

Returns: true if any points were enclosed or false if all the points were outside of the clipping rectangle.
Thread safety: It is safe to call this function from any thread.
C declaration: SDL_GetRectEnclosingPointsFloat, defined at SDL3/SDL_rect.h 497:34

Since: 3.2.0

sDL_GetRectAndLineIntersectionFloat Source #

Arguments

:: PtrConst SDL_FRect	`rect` an `SDL_FRect` structure representing the rectangle to intersect.
-> Ptr CFloat	`X1` a pointer to the starting X-coordinate of the line.
-> Ptr CFloat	`Y1` a pointer to the starting Y-coordinate of the line.
-> Ptr CFloat	`X2` a pointer to the ending X-coordinate of the line.
-> Ptr CFloat	`Y2` a pointer to the ending Y-coordinate of the line.
-> IO CBool

Calculate the intersection of a rectangle and line segment with float precision.

This function is used to clip a line segment to a rectangle. A line segment contained entirely within the rectangle or that does not intersect will remain unchanged. A line segment that crosses the rectangle at either or both ends will be clipped to the boundary of the rectangle and the new coordinates saved in X1, Y1, X2, and/or Y2 as necessary.

Returns: true if there is an intersection, false otherwise.
Thread safety: It is safe to call this function from any thread.
C declaration: SDL_GetRectAndLineIntersectionFloat, defined at SDL3/SDL_rect.h 520:34

Since: 3.2.0