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...save a Webbrowser page to a bitmap?
Autor: Donall Burns
[ Print tip ]  

Tip Rating (10):  
     


uses
  
MSHTML_TLB, JPEG, ActiveX, ComObj;

procedure generateJPEGfromBrowser(browser: iWebBrowser2; jpegFQFilename: string;
  srcHeight: Integer; srcWidth: Integer; tarHeight: Integer; tarWidth: Integer);
var
  
sourceDrawRect: TRect;
  targetDrawRect: TRect;
  sourceBitmap: TBitmap;
  targetBitmap: TBitmap;
  jpeg: TJPEGImage;
  viewObject: IViewObject;
begin
  
sourceBitmap := TBitmap.Create;
  targetBitmap := TBitmap.Create;
  jpeg := TJPEGImage.Create;
  try
    try
      
sourceDrawRect := Rect(0, 0, srcWidth, srcHeight);
      sourceBitmap.Width  := srcWidth;
      sourceBitmap.Height := srcHeight;

      viewObject := browser as IViewObject;

      if viewObject = nil then
        
Exit;

      OleCheck(viewObject.Draw(DVASPECT_CONTENT, 1, nilnil, Form1.Handle,
        sourceBitmap.Canvas.Handle, @sourceDrawRect, nilnil, 0));

      // Resize the src bitmap to the target bitmap
      
targetDrawRect := Rect(0, 0, tarWidth, tarHeight);
      targetBitmap.Height := tarHeight;
      targetBitmap.Width  := tarWidth;
      targetBitmap.Canvas.StretchDraw(targetDrawRect, sourceBitmap);

      // Create a JPEG from the Bitmap and save it
      
jpeg.Assign(targetBitmap);

      jpeg.SaveToFile(jpegFQFilename);
    finally
      
jpeg.Free;
      sourceBitmap.Free;
      targetBitmap.Free;
    end;
  except
    
// Error Code
  
end;
end;

procedure TForm1.btnButton1Click(Sender: TObject);
var
  
IDoc1: IHTMLDocument2;
  Web: ShDocVW_TLB.IWebBrowser2;
  tmpX, tmpY: Integer;
begin
  with 
WebBrowser1 do
  begin
    
Document.QueryInterface(IHTMLDocument2, iDoc1);
    Web := ControlInterface;
    tmpX := Height;
    tmpY := Width;
    TControl(WebBrowser1).Visible := Boolean(0);
    Height := OleObject.Document.ParentWindow.Screen.Height;
    Width := OleObject.Document.ParentWindow.Screen.Width;
    generateJPEGfromBrowser(Web,'c:\test.jpg',Height, Width, Height, Width);
    Height := tmpX;
    Width := tmpY;
    TControl(WebBrowser1).Visible := Boolean(1);
  end;
end;

 

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