SDL.Rotozoom

Bindings to SDL2_gfx's surface rotation and zoom functionality.

Documentation

type Angle = Double

Desired rotation in degrees.

type Zoom = Double

A dimension scaling factor.

data Smooth

Whether resulting Surfaces are anti-aliased or not.

Constructors

Smooth

Rough

Instances

Bounded Smooth

Methods

minBound :: Smooth

maxBound :: Smooth

Enum Smooth

Methods

succ :: Smooth -> Smooth

pred :: Smooth -> Smooth

toEnum :: Int -> Smooth

fromEnum :: Smooth -> Int

enumFrom :: Smooth -> [Smooth]

enumFromThen :: Smooth -> Smooth -> [Smooth]

enumFromTo :: Smooth -> Smooth -> [Smooth]

enumFromThenTo :: Smooth -> Smooth -> Smooth -> [Smooth]

Eq Smooth

Methods

(==) :: Smooth -> Smooth -> Bool

(/=) :: Smooth -> Smooth -> Bool

Ord Smooth

Methods

compare :: Smooth -> Smooth -> Ordering

(<) :: Smooth -> Smooth -> Bool

(<=) :: Smooth -> Smooth -> Bool

(>) :: Smooth -> Smooth -> Bool

(>=) :: Smooth -> Smooth -> Bool

max :: Smooth -> Smooth -> Smooth

min :: Smooth -> Smooth -> Smooth

Read Smooth

Methods

readsPrec :: Int -> ReadS Smooth

readList :: ReadS [Smooth]

readPrec :: ReadPrec Smooth

readListPrec :: ReadPrec [Smooth]

Show Smooth

Methods

showsPrec :: Int -> Smooth -> ShowS

show :: Smooth -> String

showList :: [Smooth] -> ShowS

Generic Smooth

Associated Types

type Rep Smooth :: * -> *

Methods

from :: Smooth -> Rep Smooth x

to :: Rep Smooth x -> Smooth

type Rep Smooth

type Rep Smooth = D1 (MetaData "Smooth" "SDL.Rotozoom" "sdl2-gfx-0.2-95ZOnzPyXUwG8CF7AeiFul" False) ((:+:) (C1 (MetaCons "Smooth" PrefixI False) U1) (C1 (MetaCons "Rough" PrefixI False) U1))

rotozoom :: 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.

rotozoomXY :: 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.

type Size = V2 CInt

A surface size, packing width and height.

rotozoomSize :: 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.

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

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

zoom :: 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.

zoomXY :: 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.

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

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

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

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

shrink :: 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.

rotate90 :: 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.