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Copyright 2016 KolibriOS team |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public License |
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along with this program. If not, see . |
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*) |
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MODULE RasterWorks; |
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IMPORT sys := SYSTEM, KOSAPI; |
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CONST |
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(* flags *) |
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bold *= 1; |
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italic *= 2; |
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underline *= 4; |
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strike_through *= 8; |
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align_right *= 16; |
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align_center *= 32; |
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bpp32 *= 128; |
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(* encoding *) |
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cp866 *= 1; |
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utf16le *= 2; |
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utf8 *= 3; |
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VAR |
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// draw text on 24bpp or 32bpp image |
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// autofits text between 'x' and 'xSize' |
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drawText *: PROCEDURE (canvas, x, y, string, charQuantity, fontColor, params: INTEGER): INTEGER; |
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(* |
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[canvas]: |
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xSize dd ? |
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ySize dd ? |
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picture rb xSize * ySize * bpp |
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fontColor dd AARRGGBB |
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AA = alpha channel ; 0 = transparent, FF = non transparent |
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params dd ffeewwhh |
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hh = char height |
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ww = char width ; 0 = auto (proportional) |
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ee = encoding ; 1 = cp866, 2 = UTF-16LE, 3 = UTF-8 |
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ff = flags ; 0001 = bold, 0010 = italic |
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; 0100 = underline, 1000 = strike-through |
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00010000 = align right, 00100000 = align center |
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01000000 = set text area between higher and lower halfs of 'x' |
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10000000 = 32bpp canvas insted of 24bpp |
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all flags combinable, except align right + align center |
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returns: char width (0 = error) |
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*) |
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// calculate amount of valid chars in UTF-8 string |
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// supports zero terminated string (set byteQuantity = -1) |
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cntUTF_8 *: PROCEDURE (string, byteQuantity: INTEGER): INTEGER; |
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// calculate amount of chars that fits given width |
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charsFit *: PROCEDURE (areaWidth, charHeight: INTEGER): INTEGER; |
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// calculate string width in pixels |
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strWidth *: PROCEDURE (charQuantity, charHeight: INTEGER): INTEGER; |
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PROCEDURE params* (charHeight, charWidth, encoding, flags: INTEGER): INTEGER; |
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(* |
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hh = char height |
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ww = char width ; 0 = auto (proportional) |
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ee = encoding ; 1 = cp866, 2 = UTF-16LE, 3 = UTF-8 |
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ff = flags ; 0001 = bold, 0010 = italic |
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; 0100 = underline, 1000 = strike-through |
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00010000 = align right, 00100000 = align center |
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01000000 = set text area between higher and lower halfs of 'x' |
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10000000 = 32bpp canvas insted of 24bpp |
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all flags combinable, except align right + align center |
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*) |
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RETURN charHeight + LSL(charWidth, 8) + LSL(encoding, 16) + LSL(flags, 24) |
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END params; |
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PROCEDURE main; |
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VAR Lib: INTEGER; |
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PROCEDURE GetProc(v: INTEGER; name: ARRAY OF CHAR); |
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VAR a: INTEGER; |
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BEGIN |
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a := KOSAPI.GetProcAdr(name, Lib); |
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ASSERT(a # 0); |
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sys.PUT(v, a) |
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END GetProc; |
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BEGIN |
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Lib := KOSAPI.LoadLib("/rd/1/lib/RasterWorks.obj"); |
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ASSERT(Lib # 0); |
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GetProc(sys.ADR(drawText), "drawText"); |
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GetProc(sys.ADR(cntUTF_8), "cntUTF-8"); |
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GetProc(sys.ADR(charsFit), "charsFit"); |
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GetProc(sys.ADR(strWidth), "strWidth"); |
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END main; |
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BEGIN |
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main |
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END RasterWorks. |