Subversion Repositories Kolibri OS

(*

    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 .

*)

MODULE Graph;

IMPORT SYSTEM, KOSAPI, Lines, Languages, E := Encodings;

CONST

    modeCOPY = 0;

    modeNOT  = 1;

    modeXOR  = 2;

    triUp* = FALSE;

    triDown* = TRUE;

    triLeft* = FALSE;

    triRight* = TRUE;

TYPE

    tFont* = POINTER TO RECORD

        handle*: INTEGER;

        height*: INTEGER;

        width*:  INTEGER;

        size:    INTEGER;

        flags:   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;

VAR

	font0*, font1*, font2*: tFont;

PROCEDURE getRGB* (color: INTEGER; VAR r, g, b: BYTE);

BEGIN

	b := color MOD 256;

	g := color DIV 256 MOD 256;

	r := color DIV 65536 MOD 256

END getRGB;

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

BEGIN

    KOSAPI.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 (size: INTEGER; name: ARRAY OF WCHAR; attr: SET): tFont;

VAR

    font: tFont;

BEGIN

	ASSERT(size IN {0, 1, 2});

    NEW(font);

    font.size := size;

    IF size = 0 THEN

	    font.width := 6;

	    font.height := 9;

	    font.flags := 08000000H

    ELSE

	    font.width := size*8;

	    font.height := size*16;

	    IF size = 1 THEN

	    	font.flags := 28000000H

	    ELSIF size = 2 THEN

	    	font.flags := 29000000H

	    END

    END;

    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 + 4*(y*canvas.width + X1);

        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 + 4*(Y1*canvas.width + x);

        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

	ASSERT(ABS(k) = 1);

    color := canvas.color;

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

    d := 4*(1 - canvas.width*k);

    WHILE x1 <= x2 DO

        SYSTEM.PUT32(ptr, color);

        INC(ptr, d);

        INC(x1)

    END

END DLine;

PROCEDURE Triangle* (canvas: tCanvas; x1, y1, x2, y2: INTEGER; orientation: BOOLEAN);

VAR

	i, a, b, d: INTEGER;

	line: PROCEDURE (canvas: tCanvas; c, c1, c2: INTEGER);

BEGIN

	line := NIL;

	d := ORD(orientation)*2 - 1;

	IF y1 = y2 THEN

		i := y1;

		a := MIN(x1, x2);

		b := MAX(x1, x2);

		line := HLine

	ELSIF x1 = x2 THEN

		i := x1;

		a := MIN(y1, y2);

		b := MAX(y1, y2);

		line := VLine

	END;

	IF line # NIL THEN

		WHILE a <= b DO

			line(canvas, i, a, b);

			INC(i, d);

			INC(a);

			DEC(b)

		END

	END

END Triangle;

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; delimColor: INTEGER);

CONST

    WCHAR_SIZE = 2;

VAR

    color, i, ch: INTEGER;

    font: tFont;

    c: WCHAR;

BEGIN

	font := canvas.font;

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

        IF x < 0 THEN

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

            INC(x, i*font.width);

            DEC(n, i)

        ELSE

            i := 0

        END;

        IF n > 0 THEN

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

            color := canvas.color;

            canvas.color := canvas.backColor;

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

            canvas.color := color;

            WHILE n > 0 DO

                SYSTEM.GET(text + i*WCHAR_SIZE, c);

                IF ~Lines.isSpace(c) THEN

                	IF Languages.isDelim(c) THEN

                		color := delimColor

                	ELSE

                		color := canvas.textColor

                	END;

					IF c = Lines.NUL THEN

                		c := 0X

					END;

					IF font = font0 THEN

						ch := E.UNI[ORD(c), E.CP866];

						IF ch = E.UNDEF THEN

							c := "?"

						ELSE

							c := WCHR(ch)

						END

					END;

                    KOSAPI.sysfunc6(4, x*65536 + y, font.flags + color, SYSTEM.ADR(c), 1, canvas.bitmap - 8)

                END;

                INC(x, font.width);

                INC(i);

                DEC(n)

            END

        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, canvas.textColor)

END TextOut2;

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

VAR

    canvas: tCanvas;

BEGIN

    NEW(canvas);

    canvas.bitmap := KOSAPI.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 := KOSAPI.free(canvas.bitmap - 8);

        DISPOSE(canvas)

    END

END destroy;

BEGIN

    font0 := CreateFont(0, "", {});

    font1 := CreateFont(1, "", {});

    font2 := CreateFont(2, "", {});

END Graph.