Converting RTF (Contents of RichEdit) to Bitmap

How can I convert the contents of RichEdit to a Bitmap in an efficient manner? The ideal situation would be to read a rich text file from memory and then convert to a Bitmap.
Rick_SAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

kangadruCommented:
Though I haven't tried this, I imagine the easiest way would be to print the RTF to a TBitmap.Canvas manually using TextOut and manually setting the properties.  I don't think there is a way to just designate the RTF Print Canvas short of rewriting your own TRichEdit based on the TcustomRichEdit and overriding the Print routine there to output to a TBitmap.Canvas instead of the Default PRinter DC (if you have the VCL Source, lookup TRichEdit.Print to see how they do it). I know it's an ugly solution but it is the only way I am aware of to do a bitmap from a RichEdit as the PainTo call does nothing more than display a bitmap of the control itself not the contents therofAndy
0
erajojCommented:
This is NOT beautiful, but it copies the TRichEdit image
to a TImage:

procedure TMainForm.Button6Click(Sender: TObject);
var
  img: HDC;
begin
  img := GetDC(RichEdit1.Handle);
  BitBlt(
    Image1.Canvas.Handle,      // handle of destination device context
    0,                    // x-coordinate of destination rectangle's upper-left corner
    0,                    // y-coordinate of destination rectangle's upper-left corner
    RichEdit1.Width,  // width of destination rectangle
    RichEdit1.Height, // height of destination rectangle
    img,            // handle of source device context
    0,                    // x-coordinate of source rectangle's upper-left corner
    0,                    // y-coordinate of source rectangle's upper-left corner
    SRCCOPY             // raster operation code
   );
   Image1.Refresh;
end;

Hope this helps!

/// John

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Rick_SAuthor Commented:
That works good but maybe is wasn't very clear...  I need to do this without the RichEdit component visable the example above didn't work when the 'RichEdit1.Visible := False' for obvious reasons.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Fonts Typography

From novice to tech pro — start learning today.