Safe Haskell	None
Language	Haskell2010

FreeType.FontConfig

Synopsis

ftCharIndex :: FT_Face -> Char -> Word
ftCharSet :: FT_Face -> CharSet
ftCharSetAndSpacing :: FT_Face -> (CharSet, Spacing)
ftQuery :: FilePath -> Int -> IO (Pattern, Int)
ftQueryAll :: FilePath -> Int -> IO (FontSet, Int)
ftQueryFace :: FT_Face -> FilePath -> Int -> IO Pattern
data FTFC_Instance = Instance {
- fontName :: Maybe String
- fontPath :: Maybe String
- fontFace :: FT_Face
- fontLoadFlags :: Int
- fontAntialias :: Bool
- fontEmbolden :: Bool
- fontIsColor :: Bool
- fontRenderFlags :: Int
- fontRenderFlagsSubpixel :: Int
- fontPixelSizeFixup :: Double
- fontPixelFixupEstimated :: Bool
- fontBGR :: Bool
- fontLCDFilter :: FT_LcdFilter
- fontFeats :: [String]
- fontMetrics :: FTFC_Metrics
}
data FTFC_Metrics = Metrics {
- height :: Int
- descent :: Int
- ascent :: Int
- maxAdvance :: (Int, Int)
- metricsAntialias :: Bool
- metricsSubpixel :: FTFC_Subpixel
- metricsName :: Maybe String
}
data FTFC_Subpixel
instantiatePattern :: FT_Library -> Pattern -> (Double, Double) -> IO FTFC_Instance
data FTFC_Glyph a = Glyph {
- glyphFontName :: Maybe String
- glyphImage :: a
- glyphAdvance :: (Double, Double)
- glyphSubpixel :: FTFC_Subpixel
- glyphMetrics :: FT_Glyph_Metrics
}
glyphForIndex :: FTFC_Instance -> Word32 -> FTFC_Subpixel -> (FT_Bitmap -> IO a) -> IO (FTFC_Glyph a)
bmpAndMetricsForIndex :: FTFC_Instance -> FTFC_Subpixel -> Word32 -> IO (FT_Bitmap, FT_Glyph_Metrics)

Documentation

ftCharIndex :: FT_Face -> Char -> Word Source #

Maps a Unicode char to a glyph index. This function uses information from several possible underlying encoding tables to work around broken fonts. As a result, this function isn't designed to be used in performance sensitive areas; results from this function are intended to be cached by higher level functions.

ftCharSet :: FT_Face -> CharSet Source #

Scans a FreeType face and returns the set of encoded Unicode chars.

ftCharSetAndSpacing :: FT_Face -> (CharSet, Spacing) Source #

ftQuery :: FilePath -> Int -> IO (Pattern, Int) Source #

Constructs a pattern representing the idth face in fst. The number of faces in file is returned in snd.

ftQueryAll :: FilePath -> Int -> IO (FontSet, Int) Source #

Constructs patterns found in filename. If id is -1, then all patterns found in filename are added to fst. Otherwise, this function works exactly like ftQuery. The number of faces in filename is returned in snd.

ftQueryFace :: FT_Face -> FilePath -> Int -> IO Pattern Source #

Constructs a pattern representing face. filename and id are used solely as data for pattern elements.

data FTFC_Instance Source #

A FT_Face queried from FontConfig with glyph-loading parameters.

Constructors

Instance
Fields fontName :: Maybe String fontPath :: Maybe String fontFace :: FT_Face fontLoadFlags :: Int fontAntialias :: Bool fontEmbolden :: Bool fontIsColor :: Bool fontRenderFlags :: Int fontRenderFlagsSubpixel :: Int fontPixelSizeFixup :: Double fontPixelFixupEstimated :: Bool fontBGR :: Bool fontLCDFilter :: FT_LcdFilter fontFeats :: [String] fontMetrics :: FTFC_Metrics

data FTFC_Metrics Source #

Results queried from FontConfig with caller-relevant properties, notably relating to layout.

Constructors

Metrics
Fields height :: Int descent :: Int ascent :: Int maxAdvance :: (Int, Int) metricsAntialias :: Bool metricsSubpixel :: FTFC_Subpixel metricsName :: Maybe String

data FTFC_Subpixel Source #

Defines subpixel order to use. Note that this is *ignored* if antialiasing has been disabled.

Constructors

SubpixelNone	From FontConfig.
SubpixelHorizontalRGB
SubpixelHorizontalBGR
SubpixelVerticalRGB
SubpixelVerticalBGR
SubpixelDefault	Disable subpixel antialiasing.

instantiatePattern :: FT_Library -> Pattern -> (Double, Double) -> IO FTFC_Instance Source #

Converts the results of a FontConfig query requesting a specific size into a FT_Face & related properties. Throw exceptions.

data FTFC_Glyph a Source #

Results from glyphForIndex.

Constructors

Glyph
Fields glyphFontName :: Maybe String glyphImage :: a glyphAdvance :: (Double, Double) glyphSubpixel :: FTFC_Subpixel glyphMetrics :: FT_Glyph_Metrics

glyphForIndex :: FTFC_Instance -> Word32 -> FTFC_Subpixel -> (FT_Bitmap -> IO a) -> IO (FTFC_Glyph a) Source #

Looks up a given glyph in a FTFC_Instance & its underlying FT_Face Taking into account additional properties from FontConfig. Runs a provided callback to render the glyph into a reusable datastructure. The FT_Bitmap given to this callback must not be used outside it. Throws exceptions.

bmpAndMetricsForIndex :: FTFC_Instance -> FTFC_Subpixel -> Word32 -> IO (FT_Bitmap, FT_Glyph_Metrics) Source #