(*
    Copyright 2021, 2022 Anton Krotov

    This file is part of CEdit.

    CEdit is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    CEdit is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with CEdit. If not, see <http://www.gnu.org/licenses/>.
*)

MODULE Icons;

IMPORT
    LibImg, K := KolibriOS, Graph, SYSTEM;

CONST
    fileName = "/sys/Icons16.png";
    SIZE* = 18;

VAR
    source: INTEGER;


PROCEDURE copy (src, dst: INTEGER);
VAR
    src_sizeX, src_sizeY, dst_sizeX, dst_sizeY,
    src_data, dst_data: INTEGER;
BEGIN
    LibImg.GetInf(src, src_sizeX, src_sizeY, src_data);
    LibImg.GetInf(dst, dst_sizeX, dst_sizeY, dst_data);
    ASSERT(src_sizeX = dst_sizeX);
    ASSERT(src_sizeY = dst_sizeY);
    SYSTEM.MOVE(src_data, dst_data, src_sizeX*src_sizeY*3)
END copy;


PROCEDURE load (): INTEGER;
VAR
    y: INTEGER;
BEGIN
    RETURN LibImg.LoadFromFile(fileName, SIZE, y)
END load;


PROCEDURE draw* (icons, n, x, y: INTEGER);
VAR
    sizeX, sizeY, data: INTEGER;
BEGIN
    LibImg.GetInf(icons, sizeX, sizeY, data);
    K.DrawImage(data + SIZE*SIZE*3*n, SIZE, SIZE, x, y)
END draw;


PROCEDURE gray (icons: INTEGER);
VAR
    sizeX, sizeY, data, x, y: INTEGER;
    b, g, r, gr: BYTE;
BEGIN
    LibImg.GetInf(icons, sizeX, sizeY, data);
    FOR y := 0 TO sizeY - 1 DO
        FOR x := 0 TO sizeX - 1 DO
            SYSTEM.GET8(data, b);
            SYSTEM.GET8(data + 1, g);
            SYSTEM.GET8(data + 2, r);
            gr := (r + g + b) DIV 3;
            SYSTEM.PUT8(data, gr);
            SYSTEM.PUT8(data + 1, gr);
            SYSTEM.PUT8(data + 2, gr);
            INC(data, 3);
        END
    END
END gray;


PROCEDURE iconsBackColor (icons: INTEGER; BackColor: INTEGER);
VAR
    sizeX, sizeY, data, x, y: INTEGER;
    b, g, r: BYTE;
BEGIN
    LibImg.GetInf(icons, sizeX, sizeY, data);
    FOR y := 0 TO sizeY - 1 DO
        FOR x := 0 TO sizeX - 1 DO
            SYSTEM.GET8(data, b);
            SYSTEM.GET8(data + 1, g);
            SYSTEM.GET8(data + 2, r);
            IF b + g + r = 765 THEN
            	Graph.getRGB(BackColor, r, g, b)
            END;
            SYSTEM.PUT8(data, b);
            SYSTEM.PUT8(data + 1, g);
            SYSTEM.PUT8(data + 2, r);
            INC(data, 3);
        END
    END
END iconsBackColor;


PROCEDURE get* (VAR icons, grayIcons: INTEGER; BackColor: INTEGER);
BEGIN
    IF source = 0 THEN
        source := load();
        icons := load();
        grayIcons := load()
    ELSE
        copy(source, icons);
        copy(source, grayIcons)
    END;
    gray(grayIcons);
    iconsBackColor(icons, BackColor);
    iconsBackColor(grayIcons, BackColor)
END get;


BEGIN
    source := 0
END Icons.