Module Sdlttf

module Sdlttf: sig .. end

This module provides TTF (TrueType Font) support

exception SDLttf_exception of string

Exception for reporting errors

val init : unit -> unit

Initialise SDL_tff and freetype

val quit : unit -> unit

Quits the system

General operations on font datatype

type font

abstract font datatype

val open_font : string -> ?index:int -> int -> font

open a font file and create a font of the specified point size
Returns font datatype

Set and retrieve the font style This font style is implemented by modifying the font glyphs, and doesn't reflect any inherent properties of the truetype font file.

type font_style =

`\|`	`NORMAL`
`\|`	`BOLD`
`\|`	`ITALIC`
`\|`	`UNDERLINE`

val get_font_style : font -> font_style list

Retrieve the font style : either NORMAL or a combination of BOLD, ITALIC and UNDERLINE

val set_font_style : font -> font_style list -> unit

Font information

val font_height : font -> int

Returns the total height(int) of the font (usually equal to point size)

val font_ascent : font -> int

Returns the offset(int) from the baseline to the top of the font this is a positive value, relative to the baseline

val font_descent : font -> int

Returns the offset from the baseline to the bottom of the font this is a negative value, relative to the baseline

val font_lineskip : font -> int

Get the recommended spacing between lines of text for this font

val font_faces : font -> int

Get the number of faces of the font

Get some font face attributes, if any

val is_fixed_width : font -> bool

val family_name : font -> string

val style_name : font -> string

Text rendering functions

val size_text : font -> string -> int * int

Get the dimensions of a rendered string of text

val glyph_metrics : font -> char -> int * int * int * int

Returns the metrics (minx,maxx,miny,maxy) of a glyph

type render_kind =

`\|`	`SOLID of Sdlvideo.color`
`\|`	`SHADED of Sdlvideo.color * Sdlvideo.color`
`\|`	`BLENDED of Sdlvideo.color`

Variant type for the generic rendering functions

Text rendering functions

val render_text_solid : font -> string -> fg:Sdlvideo.color -> Sdlvideo.surface

val render_text_shaded : font ->
       string -> fg:Sdlvideo.color -> bg:Sdlvideo.color -> Sdlvideo.surface

val render_text_blended : font -> string -> fg:Sdlvideo.color -> Sdlvideo.surface

val render_text : font -> render_kind -> string -> Sdlvideo.surface

Glyph rendering functions

val render_glyph_solid : font -> char -> fg:Sdlvideo.color -> Sdlvideo.surface

val render_glyph_shaded : font ->
       char -> fg:Sdlvideo.color -> bg:Sdlvideo.color -> Sdlvideo.surface

val render_glyph_blended : font -> char -> fg:Sdlvideo.color -> Sdlvideo.surface

val render_glyph : font -> render_kind -> char -> Sdlvideo.surface