Encontré esta solución, ya la compile y va 100%:
Código Delphi
[-]
unit uPrincipal;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ExtCtrls, DelphiZXingQRCode,
Vcl.StdCtrls;
type
TForm1 = class(TForm)
btnGenerarQR: TButton;
Image1: TImage;
procedure btnGenerarQRClick(Sender: TObject);
private
public
end;
type
TQrImage_ErrCorrLevel=(L,M,Q,H);
var
Form1: TForm1;
implementation
uses jpeg, PngImage, HTTPApp, WinInet;
const
UrlGoogleQrCode='http://chart.apis.google.com/chart?chs=%dx%d&cht=qr&chld=%s&chl=%s';
QrImgCorrStr : array [TQrImage_ErrCorrLevel] of string=('L','M','Q','H');
{$R *.dfm}
procedure WinInet_HttpGet(const Url: string;Stream:TStream);
const
BuffSize = 1024*1024;
var
hInter : HINTERNET;
UrlHandle: HINTERNET;
BytesRead: DWORD;
Buffer : Pointer;
begin
hInter := InternetOpen('', INTERNET_OPEN_TYPE_PRECONFIG, nil, nil, 0);
if Assigned(hInter) then
begin
Stream.Seek(0,0);
GetMem(Buffer,BuffSize);
try
UrlHandle := InternetOpenUrl(hInter, PChar(Url), nil, 0, INTERNET_FLAG_RELOAD, 0);
if Assigned(UrlHandle) then
begin
repeat
InternetReadFile(UrlHandle, Buffer, BuffSize, BytesRead);
if BytesRead>0 then
Stream.WriteBuffer(Buffer^,BytesRead);
until BytesRead = 0;
InternetCloseHandle(UrlHandle);
end;
finally
FreeMem(Buffer);
end;
InternetCloseHandle(hInter);
end
end;
procedure GetQrCode(Width,Height:Word;Correction_Level:TQrImage_ErrCorrLevel;const Data:string;StreamImage: TMemoryStream);
Var
EncodedURL: string;
begin
EncodedURL:=Format(UrlGoogleQrCode,[Width,Height,QrImgCorrStr[Correction_Level],HTTPEncode(Data)]);
WinInet_HttpGet(EncodedURL,StreamImage);
end;
procedure TForm1.btnGenerarQRClick(Sender: TObject);
var
ImageStream: TMemoryStream;
PngImage: TPngImage;
begin
Image1.Picture:=nil;
ImageStream:=TMemoryStream.Create;
PngImage :=TPngImage.Create;
try
try
GetQrCode(169,169,TQrImage_ErrCorrLevel(1),'atg',ImageStream);
if ImageStream.Size>0 then
begin
ImageStream.Position:=0;
PngImage.LoadFromStream(ImageStream);
Image1.Picture.Assign(PngImage);
end;
except
on E: exception do
ShowMessage(E.Message);
end;
finally
ImageStream.Free;
PngImage.Free;
end;
end;
end.
Sin embargo, depende de la API de Google, sigo pensando que un código standalone sigue siendo mejor.
Atte