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https://gitlab.com/freepascal.org/fpc/source.git
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261 lines
8.9 KiB
ObjectPascal
261 lines
8.9 KiB
ObjectPascal
{*
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* QR Code generator demo (Pascal)
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*
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* Run this command-line program with no arguments. The program
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* computes a demonstration QR Codes and print it to the console.
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*
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* Pascal Version: Copyright (c) Michael Van Canneyt (michael@freepascal.org)
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* Copyright (c) Project Nayuki. (MIT License)
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* https://www.nayuki.io/page/qr-code-generator-library
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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* - The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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* - The Software is provided "as is", without warranty of any kind, express or
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* implied, including but not limited to the warranties of merchantability,
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* fitness for a particular purpose and noninfringement. In no event shall the
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* authors or copyright holders be liable for any claim, damages or other
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* liability, whether in an action of contract, tort or otherwise, arising from,
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* out of or in connection with the Software or the use or other dealings in the
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* Software.
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*/
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}
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{$mode objfpc}
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{$h+}
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{$CODEPAGE UTF8}
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uses fpqrcodegen, sysutils;
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// Prints the given QR Code to the console.
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Procedure printqr (qrcode : TQRBuffer);
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var
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size : cardinal;
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border: byte;
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x,y : Integer;
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begin
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Size:=QRgetSize(qrcode);
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border:=4;
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For Y:=-Border to size+Border-1 do
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begin
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For x:=-Border to size+Border-1 do
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if (X>=0) and (Y>=0) and QRgetModule(qrcode, x, y) then
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write('##')
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else
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Write(' ');
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writeln;
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end;
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end;
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// Creates a single QR Code, then prints it to the console.
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procedure doBasicDemo;
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var
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aText : string;
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errCorLvl : TQRErrorLevelCorrection;
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tempbuffer,
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qrcode: TQRBuffer;
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begin
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SetLength(tempBuffer,QRBUFFER_LEN_MAX);
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SetLength(qrCode,QRBUFFER_LEN_MAX);
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aText:='Hello, world!'; // User-supplied text
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errCorLvl:=EccLOW; // Error correction level
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if QRencodeText(atext, tempBuffer, qrcode, errCorLvl, QRVERSIONMIN, QRVERSIONMAX, mpAUTO, true) then
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printQr(qrcode);
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end;
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// Creates a variety of QR Codes that exercise different features of the library, and prints each one to the console.
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procedure doVarietyDemo;
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const
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UTF8Encoded : Array[0..34] of byte =
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($E3,$81,$93,$E3,$82,$93,$E3,$81,$AB,$E3,$81,$A1,Ord('w'),Ord('a'),$E3,$80,$81,$E4,$B8,$96,$E7,$95,$8C,$EF,$BC,$81,$20,$CE,$B1,$CE,$B2,$CE,$B3,$CE,$B4);
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var
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atext : UTF8String;
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tempbuffer,
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qrcode: TQRBuffer;
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procedure ResetBuffer;
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begin
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FillChar(tempBuffer[0],QRBUFFER_LEN_MAX,0);
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FillChar(qrCode[0],QRBUFFER_LEN_MAX,0);
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end;
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begin
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// Project Nayuki URL
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SetLength(tempBuffer,QRBUFFER_LEN_MAX);
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SetLength(qrCode,QRBUFFER_LEN_MAX);
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if QRencodeText('https://www.nayuki.io/', tempBuffer, qrcode,
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EccHIGH, QRVERSIONMIN, QRVERSIONMAX, mp3, true) then
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PrintQr(qrCode);
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// Numeric mode encoding (3.33 bits per digit)
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ResetBuffer;
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if QRencodeText('314159265358979323846264338327950288419716939937510', tempBuffer, qrcode,
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EccMEDIUM, QRVERSIONMIN, QRVERSIONMAX, mpAUTO, true) then
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printQr(qrcode);
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// Alphanumeric mode encoding (5.5 bits per character)
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ResetBuffer;
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if QRencodeText('DOLLAR-AMOUNT:$39.87 PERCENTAGE:100.00% OPERATIONS:+-*/', tempBuffer, qrcode,
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eccHIGH, QRVERSIONMIN, QRVERSIONMAX, mpAUTO, true) then
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printQr(qrcode);
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ResetBuffer;
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// Unicode text as UTF-8, and different masks
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SetLength(aText,Length(UTF8Encoded));
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Move(UTF8Encoded[0],atext[1],Length(UTF8Encoded));
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if QRencodeText(atext, tempBuffer, qrcode,
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eccQUARTILE, QRVERSIONMIN, QRVERSIONMAX, mp0, true) then
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printQr(qrcode);
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ResetBuffer;
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if QRencodeText(atext, tempBuffer, qrcode,
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eccQUARTILE, QRVERSIONMIN, QRVERSIONMAX, mp1, true) then
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printQr(qrcode);
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ResetBuffer;
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if QRencodeText(atext, tempBuffer, qrcode,
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eccQUARTILE, QRVERSIONMIN, QRVERSIONMAX, mp5, true) then
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printQr(qrcode);
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ResetBuffer;
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if QRencodeText(atext, tempBuffer, qrcode,
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eccQUARTILE, QRVERSIONMIN, QRVERSIONMAX, mp7, true) then
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printQr(qrcode);
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ResetBuffer;
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// Moderately large QR Code using longer text (from Lewis Carroll's Alice in Wonderland)
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atext :=
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'Alice was beginning to get very tired of sitting by her sister on the bank, '
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+'and of having nothing to do: once or twice she had peeped into the book her sister was reading, '
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+'but it had no pictures or conversations in it, ''and what is the use of a book,'' thought Alice '
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+'''without pictures or conversations?'' So she was considering in her own mind (as well as she could, '
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+'for the hot day made her feel very sleepy and stupid), whether the pleasure of making a '
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+'daisy-chain would be worth the trouble of getting up and picking the daisies, when suddenly '
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+'a White Rabbit with pink eyes ran close by her.';
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Writeln(atext);
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if QRencodeText(atext, tempBuffer, qrcode, eccHIGH, QRVERSIONMIN, QRVERSIONMAX, mpAUTO, true) then
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printQr(qrcode);
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end;
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procedure doSegmentDemo;
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const
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kanjiChars : Array[0..28] of word = ( // Kanji mode encoding (13 bits per character)
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$0035, $1002, $0FC0, $0AED, $0AD7,
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$015C, $0147, $0129, $0059, $01BD,
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$018D, $018A, $0036, $0141, $0144,
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$0001, $0000, $0249, $0240, $0249,
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$0000, $0104, $0105, $0113, $0115,
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$0000, $0208, $01FF, $0008);
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var
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aText,silver0,silver1,golden0,golden1,golden2 : String;
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tempbuffer,
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qrcode: TQRBuffer;
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bytes,
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segbuf0,
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segbuf1,
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segbuf2 : TQRBuffer;
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seg : TQRSegment;
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segs : TQRSegmentArray;
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segs2 : TQRSegmentArray;
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len, I,j : integer;
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begin
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SetLength(tempBuffer,QRBUFFER_LEN_MAX);
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SetLength(qrCode,QRBUFFER_LEN_MAX);
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// Illustration 'silver'
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silver0 := 'THE SQUARE ROOT OF 2 IS 1.';
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silver1 := '41421356237309504880168872420969807856967187537694807317667973799';
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aText:=silver0+Silver1;
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if QRencodeText(aText, tempBuffer, qrcode, EccLOW, QRVERSIONMIN, QRVERSIONMAX, mpAUTO, true) then
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printQr(qrcode);
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SetLength(segBuf0,QRcalcSegmentBufferSize(mALPHANUMERIC, length(silver0)));
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SetLength(segBuf1,QRcalcSegmentBufferSize(mNUMERIC, length(silver1)));
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SetLength(Segs,2);
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segs[0]:=QRmakeAlphanumeric(silver0, segBuf0);
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segs[1]:=QRmakeNumeric(silver1, segBuf1);
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if QRencodeSegments(segs, eccLOW, tempBuffer, qrcode) then
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printQr(qrcode);
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// Illustration "golden"
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SetLength(Segbuf0,0);
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SetLength(Segbuf1,0);
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golden0 := 'Golden ratio '#$CF#$86' = 1.';
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golden1 := '6180339887498948482045868343656381177203091798057628621354486227052604628189024497072072041893911374';
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golden2 := '......';
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atext:=Golden0+Golden1+Golden2;
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if QRencodeText(aText, tempBuffer, qrcode, EccLOW, QRVERSIONMIN, QRVERSIONMAX, mpAUTO, true) then
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printQr(qrcode);
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SetLength(bytes,Length(golden0));
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for I:=1 to Length(golden0) do
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bytes[i-1]:=Ord(golden0[i]);
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SetLength(segBuf0,QRcalcSegmentBufferSize(mBYTE, length(golden0)));
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SetLength(segBuf1,QRcalcSegmentBufferSize(mNUMERIC, length(golden1)));
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SetLength(segBuf2,QRcalcSegmentBufferSize(mALPHANUMERIC, length(golden2)));
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SetLength(Segs2,3);
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segs2[0]:=QRmakeBytes(bytes, segBuf0);
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segs2[1]:=QRmakeNumeric(golden1, segBuf1);
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segs2[2]:=QRmakeAlphanumeric(golden2, segBuf2);
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SetLength(bytes,0);
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if QRencodeSegments(segs2,EccLOW, tempBuffer, qrcode) then
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PrintQR(qrCode);
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// Illustration "Madoka": kanji, kana, Greek, Cyrillic, full-width Latin characters
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SetLength(segBuf0,0);
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SetLength(segBuf1,0);
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SetLength(segBuf2,0);
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atext:= // Encoded in UTF-8
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#$E3#$80#$8C#$E9#$AD#$94#$E6#$B3#$95#$E5+
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#$B0#$91#$E5#$A5#$B3#$E3#$81#$BE#$E3#$81+
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#$A9#$E3#$81#$8B#$E2#$98#$86#$E3#$83#$9E+
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#$E3#$82#$AE#$E3#$82#$AB#$E3#$80#$8D#$E3+
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#$81#$A3#$E3#$81#$A6#$E3#$80#$81#$E3#$80+
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#$80#$D0#$98#$D0#$90#$D0#$98#$E3#$80#$80+
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#$EF#$BD#$84#$EF#$BD#$85#$EF#$BD#$93#$EF+
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#$BD#$95#$E3#$80#$80#$CE#$BA#$CE#$B1#$EF+
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#$BC#$9F;
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if QRencodeText(aText, tempBuffer, qrcode, eccLOW, QRVERSIONMIN, QRVERSIONMAX, mpAUTO, true) then
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printQr(qrcode);
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len:= SizeOf(kanjiChars) div sizeof(Word);
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SetLength(segBuf0,QRcalcSegmentBufferSize(mKANJI, len));
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seg.mode := mKANJI;
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seg.numChars := len;
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seg.bitLength := 0;
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for I:=0 to Len-1 do
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for j:=12 downto 0 do
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begin
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segBuf0[seg.bitLength shr 3]:=segBuf0[seg.bitLength shr 3] or ((kanjiChars[i] shr j) and 1) shl (7 - (seg.bitLength and 7));
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inc(seg.bitLength);
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end;
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seg.data:=segBuf0;
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SetLength(segs,1);
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segs[0]:=Seg;
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if QRencodeSegments(segs,eccLOW, tempBuffer, qrcode) then
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printQr(qrcode);
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end;
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begin
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doBasicDemo();
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doVarietyDemo();
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doSegmentDemo();
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end.
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