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unit svgzvectorialreader;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils,
zstream,
svgvectorialreader, fpvectorial, fpvutils, lazutf8;
type
{ TvSVGZVectorialReader }
TvSVGZVectorialReader = class(TvSVGVectorialReader)
public
{ General reading methods }
procedure InflateGZ(AGZFilename: string; ADest: TStream);
procedure ReadFromFile(AFileName: string; AData: TvVectorialDocument); override;
procedure ReadFromStream(AStream: TStream; AData: TvVectorialDocument); override;
end;
implementation
{ TvSVGZVectorialReader }
procedure TvSVGZVectorialReader.InflateGZ(AGZFilename: string; ADest: TStream);
var
GZStream: TGZFileStream;
chunk:string;
cnt:integer;
const
CHUNKSIZE=4096;
begin
GZStream := TGZFileStream.Create(AGZFilename, gzopenread);
try
setlength(chunk,CHUNKSIZE);
repeat
cnt := GZStream.read(chunk[1],CHUNKSIZE);
if cnt<CHUNKSIZE then
setlength(chunk,cnt);
ADest.Write(chunk[1], Length(chunk));
until cnt<CHUNKSIZE;
finally
GZStream.Free;
end;
end;
procedure TvSVGZVectorialReader.ReadFromFile(AFileName: string;
AData: TvVectorialDocument);
var
DataStream: TMemoryStream;
begin
DataStream := TMemoryStream.Create;
try
InflateGZ(AFileName, DataStream);
DataStream.Position := 0;
ReadFromStream(DataStream, AData);
//DataStream.SaveToFile('/tmp/foo.svg');
finally
DataStream.Free;
end;
end;
procedure TvSVGZVectorialReader.ReadFromStream(AStream: TStream;
AData: TvVectorialDocument);
begin
inherited ReadFromStream(AStream, AData);
end;
initialization
RegisterVectorialReader(TvSVGZVectorialReader, vfSVGZ);
end.
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