BABL.FFI.Format

Documentation

data BablFormatPtr

Constructors

BablFormatPtr

Fields

• unwrap :: BablFormatDummy

type BablFormatDummy = Ptr ()

The dummy Pointer behind BablFormatPtr. Do not peek or poke

data ComponentModel

List of component models af babl formats.

Constructors

RGB

RGBA

RaGaBaA

R'G'B'

R'G'B'A

R'aG'aB'aA

Y

YA

YaA

Y'

Y'A

Y'aA

Y'CbCr

Y'CbCrA

HSVA

HSV

CMYK

CMY

CIELab

CIELabAlpha

CIELCHab

CIELCHabAlpha

HSLA

HSL

Y'CbCr709

Y'CbCrA709

Cairo

Instances

Show ComponentModel

Methods

showsPrec :: Int -> ComponentModel -> ShowS

show :: ComponentModel -> String

showList :: [ComponentModel] -> ShowS

data ComponentFormat

Byte format of a colour component.

Constructors

CFhalf

CFfloat

CFdouble

CFu8

CFu15

CFu16

CFu32

A8

RGB24

ARGB32

Instances

Show ComponentFormat

Methods

showsPrec :: Int -> ComponentFormat -> ShowS

show :: ComponentFormat -> String

showList :: [ComponentFormat] -> ShowS

data PixelFormat

Constructors

PixelFormat

Fields

• pfComponents :: ComponentModel
• pfType :: ComponentFormat

c_babl_format

Arguments

:: CString

Format name

-> IO BablFormatDummy

create a new predefined BABL format

c_babl_get_bpp

Arguments

:: BablFormatDummy

Format to be drawn from

-> IO CInt

create and define your own BABL format foreign import ccall unsafe "babl.h babl_format_new"

Get the number of bytes per pixel from a format.

c_babl_format_get_n_components :: BablFormatDummy -> IO CInt