nanovg-0.2.0.0: Haskell bindings for nanovg

Safe HaskellSafe
LanguageHaskell2010

NanoVG.Internal.Text

Synopsis

Documentation

data Align

Constructors

AlignLeft 
AlignCenter 
AlignRight 
AlignTop 
AlignMiddle 
AlignBottom 
AlignBaseline 

Instances

newtype Font

Newtype to avoid accidental use of ints

Constructors

Font 

Fields

fontHandle :: CInt
 

Instances

data TextRow

Constructors

TextRow 

Fields

start :: !(Ptr CChar)

Pointer to the input text where the row starts.

end :: !(Ptr CChar)

Pointer to the input text where the row ends (one past the last character).

next :: !(Ptr CChar)

Pointer to the beginning of the next row.

width :: !CFloat

Logical width of the row.

textRowMinX :: !CFloat

Actual bounds of the row. Logical with and bounds can differ because of kerning and some parts over extending.

textRowMaxX :: !CFloat
 

Instances

type TextRowPtr = Ptr TextRow

data GlyphPosition

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.

Instances

type GlyphPositionPtr = Ptr GlyphPosition

safeFont :: CInt -> Maybe Font

createFont :: Context -> Text -> FileName -> IO (Maybe Font)

Creates font by loading it from the disk from specified file name. Returns handle to the font.

createFontMem :: Context -> Text -> ByteString -> IO (Maybe Font)

Creates image by loading it from the specified memory chunk. Returns handle to the font.

findFont :: Context -> Text -> IO (Maybe Font)

Finds a loaded font of specified name, and returns handle to it, or -1 if the font is not found.

fontSize :: Context -> CFloat -> IO ()

Sets the font size of current text style.

fontBlur :: Context -> CFloat -> IO ()

Sets the blur of current text style.

textLetterSpacing :: Context -> CFloat -> IO ()

Sets the letter spacing of current text style.

textLineHeight :: Context -> CFloat -> IO ()

Sets the proportional line height of current text style. The line height is specified as multiple of font size.

textAlign :: Context -> Set Align -> IO ()

Sets the text align of current text style, see NVGalign for options.

fontFaceId :: Context -> Font -> IO ()

Sets the font face based on specified id of current text style.

fontFace :: Context -> Text -> IO ()

Sets the font face based on specified name of current text styl

text :: Context -> CFloat -> CFloat -> Ptr CChar -> Ptr CChar -> IO ()

Draws text string at specified location. If end is specified only the sub-string up to the end is drawn.

textBox :: Context -> CFloat -> CFloat -> CFloat -> Text -> IO ()

Draws multi-line text string at specified location wrapped at the specified width. If end is specified only the sub-string up to the end is drawn. | White space is stripped at the beginning of the rows, the text is split at word boundaries or when new-line characters are encountered. | Words longer than the max width are slit at nearest character (i.e. no hyphenation).

newtype Bounds

Constructors

Bounds (V4 CFloat) 

Instances

peekBounds :: Ptr CFloat -> IO Bounds

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

textBounds :: Context -> CFloat -> CFloat -> Text -> IO Bounds

Measures the specified text string. Parameter bounds should be a pointer to float[4], if the bounding box of the text should be returned. The bounds value are [xmin,ymin, xmax,ymax] Returns the horizontal advance of the measured text (i.e. where the next character should drawn). Measured values are returned in local coordinate space.

textBoxBounds :: Context -> CFloat -> CFloat -> CFloat -> Text -> IO Bounds

Measures the specified multi-text string. Parameter bounds should be a pointer to float[4], if the bounding box of the text should be returned. The bounds value are [xmin,ymin, xmax,ymax] Measured values are returned in local coordinate space.

textGlyphPositions :: Context -> CFloat -> CFloat -> Ptr CChar -> Ptr CChar -> GlyphPositionPtr -> CInt -> IO CInt

Calculates the glyph x positions of the specified text. If end is specified only the sub-string will be used. Measured values are returned in local coordinate space.

textMetrics :: Context -> IO (CFloat, CFloat, CFloat)

Returns the vertical metrics based on the current text style. Measured values are returned in local coordinate space.

textBreakLines :: Context -> Ptr CChar -> Ptr CChar -> CFloat -> TextRowPtr -> CInt -> IO CInt

Breaks the specified text into lines. If end is specified only the sub-string will be used. White space is stripped at the beginning of the rows, the text is split at word boundaries or when new-line characters are encountered. Words longer than the max width are slit at nearest character (i.e. no hyphenation).

createFont'_ :: Context -> Ptr CChar -> Ptr CChar -> IO CInt

createFontMem'_ :: Context -> Ptr CChar -> Ptr CUChar -> CInt -> CInt -> IO CInt

findFont'_ :: Context -> Ptr CChar -> IO CInt

fontSize'_ :: Context -> CFloat -> IO ()

fontBlur'_ :: Context -> CFloat -> IO ()

textLetterSpacing'_ :: Context -> CFloat -> IO ()

textLineHeight'_ :: Context -> CFloat -> IO ()

textAlign'_ :: Context -> CInt -> IO ()

fontFaceId'_ :: Context -> CInt -> IO ()

fontFace'_ :: Context -> Ptr CChar -> IO ()

text'_ :: Context -> CFloat -> CFloat -> Ptr CChar -> Ptr CChar -> IO CFloat

textBox'_ :: Context -> CFloat -> CFloat -> CFloat -> Ptr CChar -> Ptr CChar -> IO ()

textBounds'_ :: Context -> CFloat -> CFloat -> Ptr CChar -> Ptr CChar -> Ptr CFloat -> IO CFloat

textBoxBounds'_ :: Context -> CFloat -> CFloat -> CFloat -> Ptr CChar -> Ptr CChar -> Ptr CFloat -> IO ()

textGlyphPositions'_ :: Context -> CFloat -> CFloat -> Ptr CChar -> Ptr CChar -> GlyphPositionPtr -> CInt -> IO CInt

textMetrics'_ :: Context -> Ptr CFloat -> Ptr CFloat -> Ptr CFloat -> IO ()

textBreakLines'_ :: Context -> Ptr CChar -> Ptr CChar -> CFloat -> TextRowPtr -> CInt -> IO CInt