Subversion Repositories Kolibri OS

(*

    Copyright 2021 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 .

*)

MODULE Graph;

IMPORT SYSTEM, K := KOSAPI;

CONST

    modeCOPY = 0;

    modeNOT  = 1;

    modeXOR  = 2;

TYPE

    tFont* = POINTER TO RECORD

        handle*: INTEGER;

        height*: INTEGER;

        width*:  INTEGER;

        size:    INTEGER;

        name*:   ARRAY 256 OF WCHAR

    END;

    tCanvas* = POINTER TO RECORD

        bitmap: INTEGER;

        width*, height*: INTEGER;

        color, backColor, textColor: INTEGER;

        font*: tFont;

        mode: INTEGER

    END;

PROCEDURE DrawCanvas* (canvas: tCanvas; x, y: INTEGER);

BEGIN

    K.sysfunc7(65, canvas.bitmap, canvas.width*65536 + canvas.height, x*65536 + y, 32, 0, 0);

END DrawCanvas;

PROCEDURE SetColor* (canvas: tCanvas; color: INTEGER);

BEGIN

    canvas.color := color

END SetColor;

PROCEDURE SetTextColor* (canvas: tCanvas; color: INTEGER);

BEGIN

    canvas.textColor := color

END SetTextColor;

PROCEDURE SetBkColor* (canvas: tCanvas; color: INTEGER);

BEGIN

    canvas.backColor := color

END SetBkColor;

PROCEDURE CreateFont* (height: INTEGER; name: ARRAY OF WCHAR; attr: SET): tFont;

VAR

    font: tFont;

BEGIN

    NEW(font);

    font.size := MAX(MIN(height, 8), 1);

    font.width := font.size*8;

    font.height := font.size*16;

    DEC(font.size);

    font.name := name

    RETURN font

END CreateFont;

PROCEDURE SetFont* (canvas: tCanvas; font: tFont);

BEGIN

    canvas.font := font

END SetFont;

PROCEDURE HLine* (canvas: tCanvas; y, x1, x2: INTEGER);

VAR

    X1, X2, i: INTEGER;

    ptr: INTEGER;

    color: INTEGER;

BEGIN

    X1 := MAX(MIN(x1, x2), 0);

    X2 := MIN(MAX(x1, x2), canvas.width - 1);

    IF (0 <= y) & (y < canvas.height) THEN

        color := canvas.color;

        ptr := canvas.bitmap + y*canvas.width*4 + X1*4;

        FOR i := X1 TO X2 DO

            SYSTEM.PUT32(ptr, color);

            INC(ptr, 4)

        END

    END

END HLine;

PROCEDURE VLine* (canvas: tCanvas; x, y1, y2: INTEGER);

VAR

    Y1, Y2, i: INTEGER;

    ptr: INTEGER;

    color: INTEGER;

BEGIN

    Y1 := MAX(MIN(y1, y2), 0);

    Y2 := MIN(MAX(y1, y2), canvas.height - 1);

    IF (0 <= x) & (x < canvas.width) THEN

        color := canvas.color;

        ptr := canvas.bitmap + Y1*canvas.width*4 + x*4;

        FOR i := Y1 TO Y2 DO

            IF canvas.mode = modeNOT THEN

                SYSTEM.GET32(ptr, color);

                color := ORD(-BITS(color)*{0..23})

            ELSIF canvas.mode = modeXOR THEN

                SYSTEM.GET32(ptr, color);

                color := ORD((BITS(color)/BITS(canvas.color))*{0..23})

            END;

            SYSTEM.PUT32(ptr, color);

            INC(ptr, canvas.width*4)

        END

    END

END VLine;

PROCEDURE notVLine* (canvas: tCanvas; x, y1, y2: INTEGER);

BEGIN

    IF (0 <= y1) & (y1 < canvas.height) & (0 <= y2) & (y2 < canvas.height) THEN

        canvas.mode := modeNOT;

        VLine(canvas, x, y1, y2);

        canvas.mode := modeCOPY

    END

END notVLine;

PROCEDURE xorVLine* (canvas: tCanvas; x, y1, y2: INTEGER);

BEGIN

    IF (0 <= y1) & (y1 < canvas.height) & (0 <= y2) & (y2 < canvas.height) THEN

        canvas.mode := modeXOR;

        SetColor(canvas, 0FF0000H);

        VLine(canvas, x, y1, y2);

        canvas.mode := modeCOPY

    END

END xorVLine;

PROCEDURE DLine* (canvas: tCanvas; x1, x2, y: INTEGER; k: INTEGER);

VAR

    ptr: INTEGER;

    color: INTEGER;

    d: INTEGER;

BEGIN

    color := canvas.color;

    ptr := canvas.bitmap + y*canvas.width*4 + x1*4;

    IF k = -1 THEN

        d := canvas.width*4 + 4

    ELSIF k = 1 THEN

        d := 4 - canvas.width*4

    END;

    WHILE x1 <= x2 DO

        SYSTEM.PUT32(ptr, color);

        INC(ptr, d);

        INC(x1)

    END

END DLine;

PROCEDURE FillRect* (canvas: tCanvas; left, top, right, bottom: INTEGER);

VAR

    y: INTEGER;

BEGIN

    FOR y := top TO bottom DO

        HLine(canvas, y, left, right)

    END

END FillRect;

PROCEDURE Rect* (canvas: tCanvas; left, top, right, bottom: INTEGER);

BEGIN

    HLine(canvas, top, left, right);

    HLine(canvas, bottom, left, right);

    VLine(canvas, left, top, bottom);

    VLine(canvas, right, top, bottom)

END Rect;

PROCEDURE clear* (canvas: tCanvas);

VAR

    ptr, ptr2, w, i: INTEGER;

BEGIN

    HLine(canvas, 0, 0, canvas.width - 1);

    w := canvas.width*4;

    ptr := canvas.bitmap;

    ptr2 := ptr;

    i := canvas.height - 1;

    WHILE i > 0 DO

        INC(ptr2, w);

        SYSTEM.MOVE(ptr, ptr2, w);

        DEC(i)

    END

END clear;

PROCEDURE TextOut* (canvas: tCanvas; x, y: INTEGER; text: INTEGER; n: INTEGER);

CONST

    WCHAR_SIZE = 2;

VAR

    color, i: INTEGER;

BEGIN

    IF (0 <= y) & (y <= canvas.height - canvas.font.height - 1) THEN

        IF x < 0 THEN

            i := -(x DIV canvas.font.width);

            INC(x, i*canvas.font.width);

            DEC(n, i)

        ELSE

            i := 0

        END;

        IF n > 0 THEN

            n := MAX(MIN(n, (canvas.width - x) DIV canvas.font.width), 0);

            color := canvas.color;

            canvas.color := canvas.backColor;

            FillRect(canvas, x, y, x + n*canvas.font.width, y + canvas.font.height);

            canvas.color := color;

(*            WHILE n > 0 DO

                K.sysfunc6(4, x*65536 + y, LSL(28H + canvas.font.size, 24) + canvas.textColor, text + i*WCHAR_SIZE, 1, canvas.bitmap - 8);

                INC(x, canvas.font.width);

                INC(i);

                DEC(n)

            END*)

            K.sysfunc6(4, x*65536 + y, LSL(28H + canvas.font.size, 24) + canvas.textColor, text + i*WCHAR_SIZE, n, canvas.bitmap - 8)

        END

    END

END TextOut;

PROCEDURE TextOut2* (canvas: tCanvas; x, y: INTEGER; text: ARRAY OF WCHAR; n: INTEGER);

BEGIN

    TextOut(canvas, x, y, SYSTEM.ADR(text[0]), n)

END TextOut2;

PROCEDURE CreateCanvas* (width, height: INTEGER): tCanvas;

VAR

    canvas: tCanvas;

BEGIN

    NEW(canvas);

    canvas.bitmap := K.malloc(width*height*4 + 8);

    ASSERT(canvas.bitmap # 0);

    SYSTEM.PUT32(canvas.bitmap, width);

    SYSTEM.PUT32(canvas.bitmap + 4, height);

    INC(canvas.bitmap, 8);

    canvas.width := width;

    canvas.height := height;

    canvas.mode := modeCOPY

    RETURN canvas

END CreateCanvas;

PROCEDURE destroy* (VAR canvas: tCanvas);

BEGIN

    IF canvas # NIL THEN

        canvas.bitmap := K.free(canvas.bitmap);

        DISPOSE(canvas)

    END

END destroy;

END Graph.