Monomer.Graphics.FFI

Provides functions for getting text dimensions and metrics.

Based on code from cocreature's https://github.com/cocreature/nanovg-hs

Documentation

data V4 a

Vector of 4 strict elements.

Constructors

V4 !a !a !a !a

Instances

Read a => Read (V4 a)

Defined in Monomer.Graphics.FFI

Methods

readsPrec :: Int -> ReadS (V4 a)

readList :: ReadS [V4 a]

readPrec :: ReadPrec (V4 a)

readListPrec :: ReadPrec [V4 a]

Show a => Show (V4 a)

Defined in Monomer.Graphics.FFI

Methods

showsPrec :: Int -> V4 a -> ShowS

show :: V4 a -> String

showList :: [V4 a] -> ShowS

Eq a => Eq (V4 a)

Defined in Monomer.Graphics.FFI

Methods

(==) :: V4 a -> V4 a -> Bool

(/=) :: V4 a -> V4 a -> Bool

Ord a => Ord (V4 a)

Defined in Monomer.Graphics.FFI

Methods

compare :: V4 a -> V4 a -> Ordering

(<) :: V4 a -> V4 a -> Bool

(<=) :: V4 a -> V4 a -> Bool

(>) :: V4 a -> V4 a -> Bool

(>=) :: V4 a -> V4 a -> Bool

max :: V4 a -> V4 a -> V4 a

min :: V4 a -> V4 a -> V4 a

newtype Bounds

Bounds of a block of text.

Constructors

Bounds (V4 CFloat)

Instances

Storable Bounds

Defined in Monomer.Graphics.FFI

Methods

sizeOf :: Bounds -> Int

alignment :: Bounds -> Int

peekElemOff :: Ptr Bounds -> Int -> IO Bounds

pokeElemOff :: Ptr Bounds -> Int -> Bounds -> IO ()

peekByteOff :: Ptr b -> Int -> IO Bounds

pokeByteOff :: Ptr b -> Int -> Bounds -> IO ()

peek :: Ptr Bounds -> IO Bounds

poke :: Ptr Bounds -> Bounds -> IO ()

Read Bounds

Defined in Monomer.Graphics.FFI

Methods

readsPrec :: Int -> ReadS Bounds

readList :: ReadS [Bounds]

readPrec :: ReadPrec Bounds

readListPrec :: ReadPrec [Bounds]

Show Bounds

Defined in Monomer.Graphics.FFI

Methods

showsPrec :: Int -> Bounds -> ShowS

show :: Bounds -> String

showList :: [Bounds] -> ShowS

Eq Bounds

Defined in Monomer.Graphics.FFI

Methods

(==) :: Bounds -> Bounds -> Bool

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

Ord Bounds

Defined in Monomer.Graphics.FFI

Methods

compare :: Bounds -> Bounds -> Ordering

(<) :: Bounds -> Bounds -> Bool

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

(>) :: Bounds -> Bounds -> Bool

(>=) :: Bounds -> Bounds -> Bool

max :: Bounds -> Bounds -> Bounds

min :: Bounds -> Bounds -> Bounds

data GlyphPosition

Position of a glyph in a text string.

Constructors

GlyphPosition

Fields

• str :: !(Ptr CChar)

  Pointer of the glyph in the input string.

• glyphX :: !CFloat

  The x-coordinate of the logical glyph position.

• glyphPosMinX :: !CFloat

  The left bound of the glyph shape.

• glyphPosMaxX :: !CFloat

  The right bound of the glyph shape.

• glyphPosMinY :: !CFloat

  The lower bound of the glyph shape.

• glyphPosMaxY :: !CFloat

  The upper bound of the glyph shape.

Instances

Storable GlyphPosition

Defined in Monomer.Graphics.FFI

Methods

sizeOf :: GlyphPosition -> Int

alignment :: GlyphPosition -> Int

peekElemOff :: Ptr GlyphPosition -> Int -> IO GlyphPosition

pokeElemOff :: Ptr GlyphPosition -> Int -> GlyphPosition -> IO ()

peekByteOff :: Ptr b -> Int -> IO GlyphPosition

pokeByteOff :: Ptr b -> Int -> GlyphPosition -> IO ()

peek :: Ptr GlyphPosition -> IO GlyphPosition

poke :: Ptr GlyphPosition -> GlyphPosition -> IO ()

Show GlyphPosition

Defined in Monomer.Graphics.FFI

Methods

showsPrec :: Int -> GlyphPosition -> ShowS

show :: GlyphPosition -> String

showList :: [GlyphPosition] -> ShowS

Eq GlyphPosition

Defined in Monomer.Graphics.FFI

Methods

(==) :: GlyphPosition -> GlyphPosition -> Bool

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

Ord GlyphPosition

Defined in Monomer.Graphics.FFI

Methods

compare :: GlyphPosition -> GlyphPosition -> Ordering

(<) :: GlyphPosition -> GlyphPosition -> Bool

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

(>) :: GlyphPosition -> GlyphPosition -> Bool

(>=) :: GlyphPosition -> GlyphPosition -> Bool

max :: GlyphPosition -> GlyphPosition -> GlyphPosition

min :: GlyphPosition -> GlyphPosition -> GlyphPosition

type GlyphPositionPtr = Ptr GlyphPosition

peekBounds :: Ptr CFloat -> IO Bounds

Reads Bounds from a pointer.

allocaBounds :: (Ptr CFloat -> IO b) -> IO b

Allocates space for Bounds.

withCString :: Text -> (CString -> IO b) -> IO b

withText :: Text -> (CString -> IO b) -> IO b

withNull :: (Ptr a -> b) -> b

Marshalling helper for a constant nullPtr

type CUStringLen = (Ptr CUChar, CInt)

Same as CStringLen, but for strings of unsigned char* array type.

useAsCUStringLen :: ByteString -> (CUStringLen -> IO a) -> IO a

Same as useAsCStringLen, but works with unsigned char* arrays.

allocCUStringLen :: ByteString -> (CUStringLen -> IO a) -> IO a

Same as useAsCUStringLen, but copies the underlying memory, leaving freeing it to the C code.

copyCUStringLenMemory :: CUStringLen -> IO CUStringLen

Copy memory under given pointer to a new address. The allocated memory is not garbage-collected and needs to be freed manually later.

newtype FMContext

Constructors

FMContext (Ptr FMContext)

Instances

Storable FMContext

Defined in Monomer.Graphics.FFI

Methods

sizeOf :: FMContext -> Int

alignment :: FMContext -> Int

peekElemOff :: Ptr FMContext -> Int -> IO FMContext

pokeElemOff :: Ptr FMContext -> Int -> FMContext -> IO ()

peekByteOff :: Ptr b -> Int -> IO FMContext

pokeByteOff :: Ptr b -> Int -> FMContext -> IO ()

peek :: Ptr FMContext -> IO FMContext

poke :: Ptr FMContext -> FMContext -> IO ()

fmInit :: Double -> IO FMContext

fmCreateFont :: FMContext -> Text -> Text -> IO Int

fmCreateFontMem :: FMContext -> Text -> ByteString -> IO Int

fmSetScale :: FMContext -> Double -> IO ()

fmFontFace :: FMContext -> Text -> IO ()

fmFontSize :: FMContext -> Double -> IO ()

fmFontBlur :: FMContext -> Double -> IO ()

fmTextLetterSpacing :: FMContext -> Double -> IO ()

fmTextLineHeight :: FMContext -> Double -> IO ()

fmTextMetrics_ :: FMContext -> IO (CFloat, CFloat, CFloat)

fmTextMetrics :: FMContext -> IO (Double, Double, Double)

fmTextBounds_ :: FMContext -> Double -> Double -> Text -> IO (Double, Bounds)

fmTextBounds :: FMContext -> Double -> Double -> Text -> IO (Double, Double, Double, Double)

fmTextGlyphPositions_ :: FMContext -> Double -> Double -> Ptr CChar -> Ptr CChar -> GlyphPositionPtr -> CInt -> IO CInt

fmTextGlyphPositions :: FMContext -> Double -> Double -> Text -> IO (Seq GlyphPosition)

fmInit'_ :: CFloat -> IO FMContext

fmCreateFont'_ :: FMContext -> Ptr CChar -> Ptr CChar -> IO CInt

fmCreateFontMem'_ :: FMContext -> Ptr CChar -> Ptr CUChar -> CInt -> IO CInt

fmSetScale'_ :: FMContext -> CFloat -> IO ()

fmFontFace'_ :: FMContext -> Ptr CChar -> IO ()

fmFontSize'_ :: FMContext -> CFloat -> IO ()

fmFontBlur'_ :: FMContext -> CFloat -> IO ()

fmTextLetterSpacing'_ :: FMContext -> CFloat -> IO ()

fmTextLineHeight'_ :: FMContext -> CFloat -> IO ()

fmTextMetrics_'_ :: FMContext -> Ptr CFloat -> Ptr CFloat -> Ptr CFloat -> IO ()

fmTextBounds_'_ :: FMContext -> CFloat -> CFloat -> Ptr CChar -> Ptr CChar -> Ptr CFloat -> IO CFloat

fmTextGlyphPositions_'_ :: FMContext -> CFloat -> CFloat -> Ptr CChar -> Ptr CChar -> GlyphPositionPtr -> CInt -> IO CInt