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GHC 10.0.0.20260917 · lts/ghc-10.0.x · 8fef28d · 2026-11-02

Modulesdl2-gfx-0.3.0.0Haskell2010

SDL.Rotozoom

Bindings to SDL2_gfx's surface rotation and zoom functionality.

Synopsis

type Angle
type Zoom
data Smooth
value rotozoom
value rotozoomXY
type Size
value rotozoomSize
value rotozoomSizeXY
value zoom
value zoomXY
value zoomSize
value zoomSizeXY
value shrink
value rotate90

Packagesdl2-gfx-0.3.0.0
Exports14
LanguageHaskell2010
LicenceMIT
SourceRotozoom.hs

typetype Angle = Double

Desired rotation in degrees.

typetype Zoom = Double

A dimension scaling factor.

datadata Smooth

Whether resulting Surfaces are anti-aliased or not.

Instances8Bounded, Enum, Eq, Ord, Read, Show, …

Bounded SmoothDefined in sdl2-gfx-0.3.0.0 · SDL.Rotozoom
Enum SmoothDefined in sdl2-gfx-0.3.0.0 · SDL.Rotozoom
Eq SmoothDefined in sdl2-gfx-0.3.0.0 · SDL.Rotozoom
Ord SmoothDefined in sdl2-gfx-0.3.0.0 · SDL.Rotozoom
Read SmoothDefined in sdl2-gfx-0.3.0.0 · SDL.Rotozoom
Show SmoothDefined in sdl2-gfx-0.3.0.0 · SDL.Rotozoom
Generic SmoothDefined in sdl2-gfx-0.3.0.0 · SDL.Rotozoom
type Rep Smooth = D1 ('MetaData "Smooth" "SDL.Rotozoom" "sdl2-gfx-0.3.0.0-EzAkfbaJBKLL7N0K1faj3s" 'False) (C1 ('MetaCons "Smooth" 'PrefixI 'False) U1 :+: C1 ('MetaCons "Rough" 'PrefixI 'False) U1)Defined in sdl2-gfx-0.3.0.0 · SDL.Rotozoom

valuerotozoom :: MonadIO m => Surface -> Angle -> Zoom -> Smooth -> m Surface

Rotates and zooms a 32 or 8-bit Surface.

If the Surface isn't 8-bit or 32-bit RGBA/ABGR, it will be converted into 32-bit RGBA.

valuerotozoomXY

:: MonadIO m
=> Surface
-> Angle
-> Zoom
-> Zoom
-> Smooth
-> m Surface

Same as rotozoom, but applies different horizontal and vertical scaling factors.

The Zoom arguments are the horizontal and vertical zoom, respectively.

typetype Size = V2 CInt

A surface size, packing width and height.

valuerotozoomSize :: MonadIO m => Size -> Angle -> Zoom -> m Size

Given the Size of an input Surface, returns the Size of a Surface resulting from a rotozoom call.

valuerotozoomSizeXY :: MonadIO m => Size -> Angle -> Zoom -> Zoom -> m Size

Same as rotozoomSize, but for different horizontal and vertical scaling factors.

valuezoom :: MonadIO m => Surface -> Zoom -> Smooth -> m Surface

Same as rotozoom, but only performs the zoom.

If a Zoom factor is negative, it flips the image on both axes.

valuezoomXY :: MonadIO m => Surface -> Zoom -> Zoom -> Smooth -> m Surface

Same as zoom, but applies different horizontal and vertical scaling factors.

If a Zoom factor is negative, it flips the image on its corresponding axis.

valuezoomSize :: MonadIO m => Size -> Zoom -> m Size

Calculates the Size of a resulting Surface for a zoom call.

valuezoomSizeXY :: MonadIO m => Size -> Angle -> Zoom -> m Size

Same as zoomSize, but for different horizontal and vertical scaling factors.

valueshrink :: MonadIO m => Surface -> CInt -> CInt -> m Surface

Shrink a surface by an integer ratio.

The two CInt arguments are the horizontal and vertical shrinking ratios: 2 halves a dimension, 5 makes it a fifth of its original size etc.

The resulting Surface is anti-aliased and, if the input wasn't 8-bit or 32-bit, converted to a 32-bit RGBA format.

valuerotate90 :: MonadIO m => Surface -> Int -> m Surface

Given a number of clockwise rotations to perform, rotates Surface in increments of 90 degrees.

Since no interpolation is done, this is faster than rotozoomer.