Since version V2.10 wPDF can export the output of the Developer Express(tm) EXPRESS PrintingSuite (www.devexpress.com) in a high quality.
This is the code to do it:
procedure TEQGridRLMainForm.PDFExportClick(Sender: TObject);
var i,w,h,res : Integer;
begin
dxComponentPrinter1.RebuildReport(nil);
WPPDFPrinter1.Modes := [wpClipRectSupport,wpAlwaysHighResPDF];
WPPDFPrinter1.BeginDoc;
try
for I := 0 To dxComponentPrinter1.GetPageCount - 1 Do
begin
with dxComponentPrinter1.CurrentLink.RealPrinterPage Do
begin
res := Screen.PixelsPerInch;
w := MulDiv(PageSizePixels.X,res,100);
h := MulDiv(PageSizePixels.Y,res,100);
WPPDFPrinter1.StartPage(w,h,res,res,0);
dxComponentPrinter1.PaintPage(WPPDFPrinter1.Canvas,I,
Rect(0,0,w,h),
PaintRectPixels);
end;
WPPDFPrinter1.EndPage;
end;
finally
WPPDFPrinter1.EndDoc;
end;
end;