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(***********************************************************************)
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(* Jun Furuse, projet Cristal, INRIA Rocquencourt *)
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(* Copyright 1999-2004 *)
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(* Institut National de Recherche en Informatique et en Automatique. *)
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(* Distributed only by permission. *)
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(***********************************************************************)
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(* $Id: fttext.ml,v 1.1 2007/01/18 10:29:57 rousse Exp $ *)
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type 'a drawer = 'a -> int -> 'a;;
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let func_darken_only org level =
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let level = 255 - level in
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{ r = if org.r > level then level else org.r;
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g = if org.g > level then level else org.g;
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b = if org.b > level then level else org.b };;
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let func_red_only org level = { r = 255; g = 0; b = 0 };;
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let unicode_of_latin s =
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let ary = Array.create (String.length s) 0 in
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for i = 0 to String.length s - 1 do
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ary.(i) <- Char.code s.[i]
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let unicode_of_euc_japan s = Jis_unicode.encode s;;
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let draw_gen render_mode renderf rot func face px py string =
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let matrix = matrix_rotate rot in
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let curx = ref (0.0) and cury = ref (0.0) in
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for i = 0 to Array.length string - 1 do
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set_transform face matrix {ft_x = !curx; ft_y = !cury};
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let advx, advy = renderf face string.(i) [] render_mode in
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let binfo = get_bitmap_info face in
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for y = 0 to binfo.bitmap_height - 1 do
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for x = 0 to binfo.bitmap_width - 1 do
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let z = read_bitmap face x y in
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if z > 255 then 255 else z
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let px = px + binfo.bitmap_left + x
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and py = py - (binfo.bitmap_top - binfo.bitmap_height + y)
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and py = py + (binfo.bitmap_top + binfo.bitmap_height - y)
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curx := !curx +. advx;
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cury := !cury +. advy;
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let draw_rotated_text = draw_gen Render_Normal render_char;;
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let draw_rotated_glyphs = draw_gen Render_Normal render_glyph;;
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let draw_text = draw_rotated_text 0.0;;
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let draw_glyphs = draw_rotated_glyphs 0.0;;
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let draw_mono_rotated_text = draw_gen Render_Mono render_char;;
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let draw_mono_rotated_glyphs = draw_gen Render_Mono render_glyph;;
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let draw_mono_text = draw_mono_rotated_text 0.0;;
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let draw_mono_glyphs = draw_mono_rotated_glyphs 0.0;;
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val create : int -> int -> t
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val destroy : t -> unit
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val get : t -> int -> int -> elt
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val set : t -> int -> int -> elt -> unit
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val unsafe_get : t -> int -> int -> elt
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val unsafe_set : t -> int -> int -> elt -> unit
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module Make(T : T) = struct
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let putpixel f bitmap = fun px py level ->
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let orgcolor = T.get bitmap px py in
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T.set bitmap px py (f orgcolor level)
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let draw_rotated_text face func bitmap px py rot string =
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draw_rotated_text rot (putpixel func bitmap) face px py string
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let draw_rotated_glyphs face func bitmap px py rot string =
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draw_rotated_glyphs rot (putpixel func bitmap) face px py string
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let draw_text face func bitmap px py string =
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draw_text (putpixel func bitmap) face px py string
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let draw_glyphs face func bitmap px py string =
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draw_glyphs (putpixel func bitmap) face px py string
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let draw_mono_rotated_text face func bitmap px py rot string =
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draw_mono_rotated_text rot (putpixel func bitmap) face px py string
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let draw_mono_rotated_glyphs face func bitmap px py rot string =
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draw_mono_rotated_glyphs rot (putpixel func bitmap) face px py string
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let draw_mono_text face func bitmap px py string =
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draw_mono_text (putpixel func bitmap) face px py string
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let draw_mono_glyphs face func bitmap px py string =
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draw_mono_glyphs (putpixel func bitmap) face px py string
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let size_gen face loadf string =
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and leftmost = ref None
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and rightmost = ref None
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and upmost = ref None
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and downmost = ref None
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for i = 0 to Array.length string - 1 do
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let _advx, _advy = loadf face string.(i) [] in
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let metrics = get_glyph_metrics face in
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let left = metrics.gm_hori.bearingx +. !curx
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and right = metrics.gm_hori.bearingx +. metrics.gm_width +. !curx
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and up = metrics.gm_hori.bearingy
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and down = metrics.gm_hori.bearingy -. metrics.gm_height
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begin match !leftmost with
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| None -> leftmost := Some left
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| Some x when x > left -> leftmost := Some left
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begin match !rightmost with
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| None -> rightmost := Some right
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| Some x when x < right -> rightmost := Some right
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begin match !upmost with
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| None -> upmost := Some up
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| Some x when x < up -> upmost := Some up
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begin match !downmost with
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| None -> downmost := Some down
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| Some x when x > down -> downmost := Some down
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curx := !curx +. metrics.gm_hori.advance
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match !leftmost, !downmost, !rightmost, !upmost with
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Some l, Some d, Some r, Some u -> l,d,r,u
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| _ -> assert false;;
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let size face string = size_gen face load_char string;;
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let size_of_glyphs face string = size_gen face load_glyph string;;
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let vector_gen loadf turn_y rot func face px py string =
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let matrix = matrix_rotate rot in
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{ matrix with ft_xy = -. matrix.ft_xy;
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ft_yy = -. matrix.ft_yy; }
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let curx = ref px and cury = ref py in
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for i = 0 to Array.length string - 1 do
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set_transform face matrix {ft_x = !curx; ft_y = !cury};
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let advx, advy = loadf face string.(i) [] in
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func (get_outline_contents face);
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curx := !curx +. advx;
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cury := !cury +. advy
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let vector_text turn_y func face px py rot string =
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vector_gen load_char turn_y rot func face px py string;;
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let vector_glyphs turn_y func face px py rot string =
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vector_gen load_glyph turn_y rot func face px py string;;
added
removed
src/fttext.ml
