(*
Copyright 2016, 2018 Anton Krotov
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*)
MODULE kfonts;
IMPORT sys := SYSTEM, File, KOSAPI;
CONST
MIN_FONT_SIZE = 8;
MAX_FONT_SIZE = 46;
bold *= 1;
italic *= 2;
underline *= 4;
strike_through *= 8;
smoothing *= 16;
bpp32 *= 32;
TYPE
Glyph = RECORD
base: INTEGER;
xsize, ysize: INTEGER;
width: INTEGER
END;
TFont_desc = RECORD
data, size, font, char_size, width, height, font_size, mem, mempos: INTEGER;
glyphs: ARRAY 4, 256 OF Glyph
END;
TFont* = POINTER TO TFont_desc;
PROCEDURE [stdcall] zeromem(size, adr: INTEGER);
BEGIN
sys.CODE(057H, 08BH, 07DH, 00CH, 08BH, 04DH, 008H, 033H, 0C0H, 09CH, 0FCH, 0F3H, 0ABH, 09DH, 05FH)
END zeromem;
PROCEDURE pset(buf, x, y, color: INTEGER; bpp32: BOOLEAN);
VAR xsize, ysize: INTEGER;
BEGIN
sys.GET(buf, xsize);
sys.GET(buf + 4, ysize);
INC(buf, 8);
IF (0 <= x) & (x < xsize) & (0 <= y) & (y < ysize) THEN
IF bpp32 THEN
sys.PUT(buf + 4 * (xsize * y + x), color)
ELSE
sys.MOVE(sys.ADR(color), buf + 3 * (xsize * y + x), 3)
END
END
END pset;
PROCEDURE pget(buf, x, y: INTEGER; bpp32: BOOLEAN): INTEGER;
VAR xsize, ysize, color: INTEGER;
BEGIN
sys.GET(buf, xsize);
sys.GET(buf + 4, ysize);
INC(buf, 8);
IF (0 <= x) & (x < xsize) & (0 <= y) & (y < ysize) THEN
IF bpp32 THEN
sys.GET(buf + 4 * (xsize * y + x), color)
ELSE
sys.MOVE(buf + 3 * (xsize * y + x), sys.ADR(color), 3)
END
END
RETURN color
END pget;
PROCEDURE getrgb(color: INTEGER; VAR r, g, b: INTEGER);
BEGIN
b := LSR(LSL(color, 24), 24);
g := LSR(LSL(color, 16), 24);
r := LSR(LSL(color, 8), 24);
END getrgb;
PROCEDURE rgb(r, g, b: INTEGER): INTEGER;
RETURN b + LSL(g, 8) + LSL(r, 16)
END rgb;
PROCEDURE create_glyph(VAR Font: TFont_desc; VAR glyph: Glyph; xsize, ysize: INTEGER);
BEGIN
glyph.base := Font.mempos;
glyph.xsize := xsize;
glyph.ysize := ysize;
Font.mempos := Font.mempos + xsize * ysize
END create_glyph;
PROCEDURE getpix(Font: TFont_desc; n, x, y, xsize: INTEGER): CHAR;
VAR res: CHAR;
BEGIN
sys.GET(Font.mem + n + x + y * xsize, res)
RETURN res
END getpix;
PROCEDURE setpix(VAR Font: TFont_desc; n, x, y, xsize: INTEGER; c: CHAR);
BEGIN
sys.PUT(Font.mem + n + x + y * xsize, c)
END setpix;
PROCEDURE smooth(VAR Font: TFont_desc; n, xsize, ysize: INTEGER);
VAR x, y: INTEGER;
BEGIN
FOR y := 1 TO ysize - 1 DO
FOR x := 1 TO xsize - 1 DO
IF (getpix(Font, n, x, y, xsize) = 1X) & (getpix(Font, n, x - 1, y - 1, xsize) = 1X) &
(getpix(Font, n, x - 1, y, xsize) = 0X) & (getpix(Font, n, x, y - 1, xsize) = 0X) THEN
setpix(Font, n, x - 1, y, xsize, 2X);
setpix(Font, n, x, y - 1, xsize, 2X)
END;
IF (getpix(Font, n, x, y, xsize) = 0X) & (getpix(Font, n, x - 1, y - 1, xsize) = 0X) &
(getpix(Font, n, x - 1, y, xsize) = 1X) & (getpix(Font, n, x, y - 1, xsize) = 1X) THEN
setpix(Font, n, x, y, xsize, 2X);
setpix(Font, n, x - 1, y - 1, xsize, 2X)
END
END
END
END smooth;
PROCEDURE _bold(VAR Font: TFont_desc; src, dst, src_xsize, dst_xsize, n: INTEGER);
VAR i, j, k: INTEGER; pix: CHAR;
BEGIN
FOR i := 0 TO src_xsize - 1 DO
FOR j := 0 TO Font.height - 1 DO
pix := getpix(Font, src, i, j, src_xsize);
IF pix = 1X THEN
FOR k := 0 TO n DO
setpix(Font, dst, i + k, j, dst_xsize, pix)
END
END
END
END
END _bold;
PROCEDURE make_glyph(VAR Font: TFont_desc; c: INTEGER);
VAR ptr, i, j, max, x, y: INTEGER; s: SET; eoc: BOOLEAN;
glyph: Glyph; pix: CHAR; bold_width: INTEGER;
BEGIN
create_glyph(Font, glyph, Font.width, Font.height);
x := 0;
y := 0;
max := 0;
ptr := Font.font + Font.char_size * c;
eoc := FALSE;
REPEAT
sys.GET(ptr, s);
INC(ptr, 4);
FOR i := 0 TO 31 DO
IF ~eoc THEN
IF i IN s THEN
setpix(Font, glyph.base, x, y, Font.width, 1X);
IF x > max THEN
max := x
END
ELSE
setpix(Font, glyph.base, x, y, Font.width, 0X)
END
END;
INC(x);
IF x = Font.width THEN
x := 0;
INC(y);
eoc := eoc OR (y = Font.height)
END
END
UNTIL eoc;
IF max = 0 THEN
max := Font.width DIV 3
END;
glyph.width := max;
smooth(Font, glyph.base, glyph.xsize, glyph.ysize);
Font.glyphs[0, c] := glyph;
bold_width := 1;
create_glyph(Font, glyph, Font.width + bold_width, Font.height);
_bold(Font, Font.glyphs[0, c].base, glyph.base, Font.glyphs[0, c].xsize, glyph.xsize, bold_width);
smooth(Font, glyph.base, glyph.xsize, glyph.ysize);
glyph.width := max + bold_width;
Font.glyphs[1, c] := glyph;
create_glyph(Font, glyph, Font.width + (Font.height - 1) DIV 3, Font.height);
FOR i := 0 TO Font.glyphs[0, c].xsize - 1 DO
FOR j := 0 TO Font.height - 1 DO
pix := getpix(Font, Font.glyphs[0, c].base, i, j, Font.glyphs[0, c].xsize);
IF pix = 1X THEN
setpix(Font, glyph.base, i + (Font.height - 1 - j) DIV 3, j, glyph.xsize, pix)
END
END
END;
smooth(Font, glyph.base, glyph.xsize, glyph.ysize);
glyph.width := max;
Font.glyphs[2, c] := glyph;
create_glyph(Font, glyph, Font.width + (Font.height - 1) DIV 3 + bold_width, Font.height);
_bold(Font, Font.glyphs[2, c].base, glyph.base, Font.glyphs[2, c].xsize, glyph.xsize, bold_width);
smooth(Font, glyph.base, glyph.xsize, glyph.ysize);
glyph.width := max + bold_width;
Font.glyphs[3, c] := glyph;
END make_glyph;
PROCEDURE OutChar(Font: TFont_desc; c: INTEGER; x, y: INTEGER; buf: INTEGER; bpp32, smoothing: BOOLEAN; color, style: INTEGER): INTEGER;
VAR i, x0, y0, xsize, mem, xmax: INTEGER; r, g, b, r0, g0, b0: INTEGER; ch: CHAR; glyph: Glyph;
BEGIN
x0 := x;
y0 := y;
style := style MOD 4;
glyph := Font.glyphs[style, c];
xsize := glyph.xsize;
xmax := x0 + xsize;
mem := Font.mem + glyph.base;
getrgb(color, r0, g0, b0);
FOR i := mem TO mem + xsize * Font.height - 1 DO
sys.GET(i, ch);
IF ch = 1X THEN
pset(buf, x, y, color, bpp32);
ELSIF (ch = 2X) & smoothing THEN
getrgb(pget(buf, x, y, bpp32), r, g, b);
r := (r * 3 + r0) DIV 4;
g := (g * 3 + g0) DIV 4;
b := (b * 3 + b0) DIV 4;
pset(buf, x, y, rgb(r, g, b), bpp32)
END;
INC(x);
IF x = xmax THEN
x := x0;
INC(y)
END
END
RETURN glyph.width
END OutChar;
PROCEDURE hline(buf, x, y, width, color: INTEGER; bpp32: BOOLEAN);
VAR i: INTEGER;
BEGIN
FOR i := x TO x + width - 1 DO
pset(buf, i, y, color, bpp32)
END
END hline;
PROCEDURE TextWidth*(Font: TFont; str, length, params: INTEGER): INTEGER;
VAR res: INTEGER; c: CHAR;
BEGIN
res := 0;
params := params MOD 4;
IF Font # NIL THEN
sys.GET(str, c);
WHILE (length > 0) OR (length = -1) & (c # 0X) DO
INC(str);
res := res + Font.glyphs[params, ORD(c)].width;
IF length > 0 THEN
DEC(length)
END;
IF length # 0 THEN
sys.GET(str, c)
END
END
END
RETURN res
END TextWidth;
PROCEDURE TextHeight*(Font: TFont): INTEGER;
VAR res: INTEGER;
BEGIN
IF Font # NIL THEN
res := Font.height
ELSE
res := 0
END
RETURN res
END TextHeight;
PROCEDURE TextClipLeft(Font: TFont; str, length, params: INTEGER; VAR x: INTEGER): INTEGER;
VAR x1: INTEGER; c: CHAR;
BEGIN
params := params MOD 4;
sys.GET(str, c);
WHILE (length > 0) OR (length = -1) & (c # 0X) DO
INC(str);
x1 := x;
x := x + Font.glyphs[params, ORD(c)].width;
IF x > 0 THEN
length := 0;
END;
IF length > 0 THEN
DEC(length)
END;
IF length # 0 THEN
sys.GET(str, c)
END
END;
x := x1
RETURN str - 1
END TextClipLeft;
PROCEDURE TextOut*(Font: TFont; canvas, x, y, str, length, color, params: INTEGER);
VAR width, xsize, ysize, str1, n: INTEGER; c: CHAR; bpp32, smoothing, underline, strike: BOOLEAN;
BEGIN
IF Font # NIL THEN
sys.GET(canvas, xsize);
sys.GET(canvas + 4, ysize);
IF (y <= -TextHeight(Font)) OR (y >= ysize) THEN
length := 0
END;
IF length # 0 THEN
smoothing := 4 IN BITS(params);
bpp32 := 5 IN BITS(params);
underline := 2 IN BITS(params);
strike := 3 IN BITS(params);
str1 := TextClipLeft(Font, str, length, params, x);
n := str1 - str;
str := str1;
IF length >= n THEN
length := length - n
END;
sys.GET(str, c)
END;
WHILE (length > 0) OR (length = -1) & (c # 0X) DO
INC(str);
width := OutChar(Font^, ORD(c), x, y, canvas, bpp32, smoothing, color, params);
IF strike THEN
hline(canvas, x + ORD(1 IN BITS(params)) * ((Font.height DIV 2) DIV 3), y + Font.height DIV 2, width + 2, color, bpp32)
END;
IF underline THEN
hline(canvas, x, y + Font.height - 1, width + 2, color, bpp32)
END;
x := x + width;
IF x > xsize THEN
length := 0
END;
IF length > 0 THEN
DEC(length)
END;
IF length # 0 THEN
sys.GET(str, c)
END
END
END
END TextOut;
PROCEDURE SetSize*(_Font: TFont; font_size: INTEGER): BOOLEAN;
VAR temp, offset, fsize, i, memsize, mem: INTEGER;
c: CHAR; Font, Font2: TFont_desc;
BEGIN
offset := -1;
IF (MIN_FONT_SIZE <= font_size) & (font_size <= MAX_FONT_SIZE) & (_Font # NIL) THEN
Font := _Font^;
Font2 := Font;
temp := Font.data + (font_size - 8) * 4;
IF (Font.data <= temp) & (temp <= Font.size + Font.data - 4) THEN
sys.GET(temp, offset);
IF offset # -1 THEN
Font.font_size := font_size;
INC(offset, 156);
offset := offset + Font.data;
IF (Font.data <= offset) & (offset <= Font.size + Font.data - 4) THEN
sys.GET(offset, fsize);
IF fsize > 256 + 6 THEN
temp := offset + fsize - 1;
IF (Font.data <= temp) & (temp <= Font.size + Font.data - 1) THEN
sys.GET(temp, c);
IF c # 0X THEN
Font.height := ORD(c);
DEC(temp);
sys.GET(temp, c);
IF c # 0X THEN
Font.width := ORD(c);
DEC(fsize, 6);
Font.char_size := fsize DIV 256;
IF fsize MOD 256 # 0 THEN
INC(Font.char_size)
END;
IF Font.char_size > 0 THEN
Font.font := offset + 4;
Font.mempos := 0;
memsize := (Font.width + 10) * Font.height * 1024;
mem := Font.mem;
Font.mem := KOSAPI.sysfunc3(68, 12, memsize);
IF Font.mem # 0 THEN
IF mem # 0 THEN
mem := KOSAPI.sysfunc3(68, 13, mem)
END;
zeromem(memsize DIV 4, Font.mem);
FOR i := 0 TO 255 DO
make_glyph(Font, i)
END
ELSE
offset := -1
END
ELSE
offset := -1
END
ELSE
offset := -1
END
ELSE
offset := -1
END
ELSE
offset := -1
END
ELSE
offset := -1
END
ELSE
offset := -1
END
END;
ELSE
offset := -1
END;
IF offset # -1 THEN
_Font^ := Font
ELSE
_Font^ := Font2
END
END
RETURN offset # -1
END SetSize;
PROCEDURE Enabled*(Font: TFont; font_size: INTEGER): BOOLEAN;
VAR offset, temp: INTEGER;
BEGIN
offset := -1;
IF (MIN_FONT_SIZE <= font_size) & (font_size <= MAX_FONT_SIZE) & (Font # NIL) THEN
temp := Font.data + (font_size - 8) * 4;
IF (Font.data <= temp) & (temp <= Font.size + Font.data - 4) THEN
sys.GET(temp, offset)
END
END
RETURN offset # -1
END Enabled;
PROCEDURE Destroy*(VAR Font: TFont);
BEGIN
IF Font # NIL THEN
IF Font.mem # 0 THEN
Font.mem := KOSAPI.sysfunc3(68, 13, Font.mem)
END;
IF Font.data # 0 THEN
Font.data := KOSAPI.sysfunc3(68, 13, Font.data)
END;
DISPOSE(Font)
END
END Destroy;
PROCEDURE LoadFont*(file_name: ARRAY OF CHAR): TFont;
VAR Font: TFont; data, size, n: INTEGER;
BEGIN
data := File.Load(file_name, size);
IF (data # 0) & (size > 156) THEN
NEW(Font);
Font.data := data;
Font.size := size;
Font.font_size := 0;
n := MIN_FONT_SIZE;
WHILE ~SetSize(Font, n) & (n <= MAX_FONT_SIZE) DO
INC(n)
END;
IF Font.font_size = 0 THEN
Destroy(Font)
END
ELSE
IF data # 0 THEN
data := KOSAPI.sysfunc3(68, 13, data)
END;
Font := NIL
END
RETURN Font
END LoadFont;
END kfonts.