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type t = {
width : int;
height : int;
scale : int;
mutable palette : Palette.t;
font : Font.t;
mutable dirty : bool;
pictures : Picture.t array;
}
let create ?font ?(image_filenames = []) (width : int) (height : int)
(scale : int) (palette : Palette.t) : t =
if scale <= 0 then raise (Invalid_argument "Invalid scale");
if width <= 0 then raise (Invalid_argument "Invalid width");
if height <= 0 then raise (Invalid_argument "Invalid height");
let font =
match font with
| Some f -> f
| None -> (
let default_font_data =
match Builtins.read "TamzenForPowerline10x20.psf" with
| Some font -> font
| None ->
failwith
(Printf.sprintf "Default font file not found in builtins.")
in
match Font.of_bytes (Bytes.of_string default_font_data) with
| Ok f -> f
| Error e ->
failwith (Printf.sprintf "Failed to load default font: %s" e))
in
let pictures, all_palettes =
let init_offset = Palette.size palette in
let init_acc = ([], init_offset, [ palette ]) in
let pics_rev, _, palettes_rev =
List.fold_left
(fun (pics_acc, offset_acc, palettes_acc) filename ->
let pic = Picture.load filename in
let shifted = Picture.with_palette_offset pic offset_acc in
let next_offset = offset_acc + Palette.size (Picture.palette pic) in
(shifted :: pics_acc, next_offset, Picture.palette pic :: palettes_acc))
init_acc image_filenames
in
(List.rev pics_rev |> Array.of_list, List.rev palettes_rev)
in
let final_palette = Palette.concat all_palettes in
{
width;
height;
scale;
palette = final_palette;
font;
dirty = true;
pictures;
}
let update_palette (screen : t) (new_palette : Palette.t) : unit =
screen.palette <- new_palette;
screen.dirty <- true
let create_with_font (width : int) (height : int) (scale : int) (font : Font.t)
(palette : Palette.t) : t =
create ~font width height scale palette
let dimensions (screen : t) : int * int = (screen.width, screen.height)
let palette (screen : t) : Palette.t = screen.palette
let font (screen : t) : Font.t = screen.font
let scale (screen : t) : int = screen.scale
let is_dirty (screen : t) : bool = screen.dirty
let clear_dirty (screen : t) : unit = screen.dirty <- false
let pictures (screen : t) : Picture.t array = screen.pictures