Showing posts with label color conversion function. Show all posts
Showing posts with label color conversion function. Show all posts

Thursday, May 31, 2018

Delphi Color values to HTML Color


function ColorToHtml(const Color: Integer): AnsiString;
const
  Hex = '0123456789ABCDEF';
var
  b, s: Byte;
begin
  Result := '#';
  s := 0;
  repeat
    b := (Color shr s) and $FF;
    Result := Result + Hex[b div 16 + 1] + Hex[b mod 16 + 1];
    Inc(s, 8);
  until s = 24;
end;

function HtmlToColor(const Html: AnsiString): Integer;
const
  Hex = '0123456789ABCDEF';
var
  p, s: Byte;
begin
  Result := 0;
  s := 0;
  p := 1;
  if Html[1] = '#' then
    Inc(p);
  repeat
    Result := Result or (((Pos(Html[p], Hex) - 1) * 16 +
      Pos(Html[p + 1], Hex) - 1) shl s);
    Inc(p, 2);
    Inc(s, 8);
  until s = 24;
end;

Sample code:

  c := StringToColor(Trim(<COLOR>));
       //ColorToString(<COLOR>)
  Panel1.Caption := ColorToHtml(c);
  Panel1.Color := HtmlToColor(ColorToHtml(c));

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