![\"\"](\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2019\/03\/watermark.jpg\")
<\/figcaption><\/figure>\n\n\n\n
function CreateWatermark(const AText, AFontName: String;
\n AFontSize, Alpha: Integer; AFontStyles: TFontStyles): TPngImage; overload;
\nvar
\n Y: Integer;
\n ASize: TSize;
\n ABitmap: TBitmap;
\n X: Integer;
\n pAlpha: pByteArray;
\n AIsHole: Boolean;
\nbegin
\n Result := TPngImage.Create;
\n ABitmap := TBitmap.Create;
\n try
\n ABitmap.SetSize(1, 1);
\n ABitmap.PixelFormat := TPixelFormat.pf24bit;
\n ABitmap.Canvas.Font.Name := AFontName;
\n ABitmap.Canvas.Font.Size := AFontSize;
\n ABitmap.Canvas.Font.Style := AFontStyles;
\n ASize := ABitmap.Canvas.TextExtent(AText);
\n ABitmap.SetSize(ASize.cx, ASize.cy);
\n ABitmap.Canvas.TextOut(0, 0, AText);
\n Result.Assign(ABitmap);
\n Result.CreateAlpha;
\n for Y := 0 to Result.Height – 1 do
\n begin
\n pAlpha := Result.AlphaScanline[Y];
\n for X := 0 to Result.Width – 1 do
\n begin
\n if Result.Pixels[X, Y] = clWhite then
\n pAlpha[X] := Byte(0)
\n else
\n begin
\n pAlpha[X] := Alpha;
\n end;
\n end;
\n end;
\n finally
\n FreeAndNil(ABitmap);
\n end;
\nend;<\/p>\n","protected":false},"excerpt":{"rendered":"
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