Safe Haskell | None |
---|
- data ImageInfo = ImageInfo {}
- swsInit :: ImageInfo -> ImageInfo -> SwsAlgorithm -> IO SwsContext
- swsReset :: SwsContext -> ImageInfo -> ImageInfo -> SwsAlgorithm -> IO SwsContext
- class SwsCompatible a where
- withSws :: SwsCompatible a => a -> (Ptr (Ptr CUChar) -> Ptr CInt -> CInt -> IO r) -> IO r
- swsScale :: (SwsCompatible src, SwsCompatible dst) => SwsContext -> src -> dst -> IO CInt
Documentation
swsInit :: ImageInfo -> ImageInfo -> SwsAlgorithm -> IO SwsContextSource
swsInit srcInfo dstInfo alg
initializations an SwsContext
to
scale and convert from srcInfo
to dstInfo
using the algorithm
alg
when scaling.
swsReset :: SwsContext -> ImageInfo -> ImageInfo -> SwsAlgorithm -> IO SwsContextSource
Obtain a context for converting the source to destination
format. If the given context is already configured for the required
conversion, it is returned. Otherwise, the given context is freed
and a new, configured context is returned. See swsInit
for a
description of the arguments.
class SwsCompatible a whereSource
A common interface required of arguments to swsScale
(a higher
level wrapper for the sws_scale
function from libswscale
).
swsPlanes :: a -> (Ptr (Ptr CUChar) -> IO r) -> IO rSource
swsStrides :: a -> (Ptr CInt -> IO r) -> IO rSource
sliceHeight :: a -> (CInt -> IO r) -> IO rSource
SwsCompatible AVFrame | |
(Pixel a, Storable (PixelBaseComponent a)) => SwsCompatible (Image a) | |
SwsCompatible (AVPixelFormat, V2 CInt, Vector CUChar) |
withSws :: SwsCompatible a => a -> (Ptr (Ptr CUChar) -> Ptr CInt -> CInt -> IO r) -> IO rSource
Supplies a continuation with all components provided by the
SwsCompatible
class.
swsScale :: (SwsCompatible src, SwsCompatible dst) => SwsContext -> src -> dst -> IO CIntSource
swsScale ctx src dst
scales the entire src
image to dst
using the previously initialized ctx
.